Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Vishay General Semiconductor - Diodes Division TZMC4V7-GS18

Name: TZMC4V7-GS18
Brand: Vishay General Semiconductor - Diodes Division
SKU: TZMC4V7-GS18
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: TZMC4V7-GS18

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Zener Diodes

Package:: DO-213AC, MINI-MELF, SOD-80

Datasheet:: TZMC4V7-GS18.pdf

Description:: DIODE ZENER 4.7V 500MW SOD80

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:6,117

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

TZMC4V7-GS18 from Vishay Semiconductors is a precision small-signal Zener diode in MiniMELF (SOD-80) package, rated for 4.7 V nominal Zener voltage at 5 mA test current, with ±5 % tolerance, 500 mW power dissipation, and low dynamic resistance (< 80 Ω), used for voltage reference and stabilization in low-power analog circuits.

For engineers reviewing the TZMC4V7-GS18 datasheet, TZMC4V7-GS18 pinout, TZMC4V7-GS18 application, or TZMC4V7-GS18 equivalent, key selection criteria include Zener voltage accuracy, temperature coefficient (–0.05 to +0.02 %/K), reverse leakage (< 0.5 μA at 1 V), thermal resistance (500 K/W on PCB), and MiniMELF packaging suitability for high-reliability surface-mount designs.

Technical Context

This device operates as a two-terminal voltage reference, leveraging sharp reverse breakdown characteristics and low noise to maintain stable DC bias points in precision regulators, sensor excitation circuits, and overvoltage protection clamps. Its design targets ambient-stable operation up to 175 °C junction temperature with MSL level 1 moisture sensitivity rating.

The TZMC4V7-GS18 exhibits a temperature coefficient range of –0.05 to +0.02 %/K and dynamic resistance under 80 Ω at 5 mA, enabling predictable voltage regulation across industrial temperature ranges without external compensation. It is specified for single-diode configuration with cathode identification via axial banding on the MiniMELF glass body.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	4.4 V min. to 5.0 V max. at I_ZT = 5 mA - defines tight regulation window for 4.7 V nominal reference
Power Dissipation (P_tot)	500 mW - supports continuous operation at full rating on standard 50 mm × 50 mm × 1.6 mm PCB
Reverse Leakage (I_R)	< 0.5 μA at V_R = 1 V - ensures minimal parasitic current draw in standby or high-impedance bias networks
Dynamic Resistance (Z_Z)	< 80 Ω at I_ZT = 5 mA - maintains low output impedance for stable voltage under varying load conditions
Temperature Coefficient (T_KVZ)	–0.05 to +0.02 %/K - enables predictable drift behavior for applications requiring < ±10 mV variation over –65 to +150 °C
Junction Temperature (T_j)	175 °C maximum - allows deployment in under-hood automotive, industrial control, and high-ambient environments
Package	MiniMELF (SOD-80) - cylindrical glass-body surface-mount package with 31 mg mass and UL 94 V-0 flammability rating

Pinout & Package

MiniMELF (SOD-80) package: axial glass-body diode with cathode identified by a dark band near one end; no polarity marking on anode end. Total length 3.7 mm, diameter 1.6 mm, weight ≈ 31 mg. Compatible with standard 8 mm tape feeders (GS18 = 10,000 units/reel).

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener cathode reference ground	Connected to lower-potential node in shunt regulator; defines reference point for V_Z measurement
Cathode	Zener breakdown terminal / voltage reference output	Connected to regulated rail; supplies stable 4.7 V reference when reverse-biased above breakdown threshold

Key Features

Feature	Design Value
Very sharp reverse characteristic	Enables precise, repeatable breakdown onset at 4.7 V with minimal knee voltage spread - critical for low-tolerance reference designs
Low reverse current level	IR < 0.5 μA at 1 V reverse bias - reduces quiescent power loss and improves accuracy in high-impedance feedback paths
Very high stability	Guaranteed ±5 % V_Z tolerance and < 0.02 %/K max. TC - supports long-term calibration integrity in instrumentation-grade circuits
Low noise	Sub-microampere reverse current and sharp knee minimize broadband noise injection into sensitive analog stages
MiniMELF robustness	Hermetically sealed glass package with MSL level 1 and 260 °C peak reflow rating - ensures reliability in automated SMT assembly

Applications

Industrial Sensor Biasing	Low-Power Voltage Reference
Use Scenario: Providing excitation voltage to resistive temperature detectors (RTDs) and bridge-based pressure sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Shunt voltage reference establishing stable 4.7 V bias point for ratiometric signal conditioning. Use Value: Enables < ±0.1 % full-scale accuracy over –40 to +85 °C ambient due to low TC and < 0.5 μA leakage.	Use Scenario: Generating a precision reference for 12-bit ADCs in battery-powered IoT endpoint nodes. IC Role / Device Role / Timing Role: Two-terminal passive reference source replacing higher-cost IC references where ultra-low quiescent current is mandatory. Use Value: Delivers 4.7 V ±5 % with < 1 μA total system overhead - extends coin-cell life beyond 10 years in sleep-mode dominant operation.
Overvoltage Clamp Protection	Microcontroller Reset Circuit
Use Scenario: Clamping transient surges on 5 V logic rails in motor drive gate driver boards exposed to inductive kickback. IC Role / Device Role / Timing Role: Fast-acting shunt protector limiting rail voltage to ≤5.0 V during ESD or switching events. Use Value: Responds within nanoseconds with < 80 Ω dynamic impedance - suppresses >95 % of 100 ns, 1 kV transients before downstream logic damage occurs.	Use Scenario: Generating a clean, temperature-stable reset threshold for ARM Cortex-M0+ microcontrollers in medical wearables. IC Role / Device Role / Timing Role: Zener-based brown-out detection element feeding comparator input for controlled power-up sequencing. Use Value: Maintains reset assertion accuracy within ±15 mV from –20 to +70 °C - prevents spurious resets during thermal cycling.

Industrial Sensor Biasing

Low-Power Voltage Reference

Use Scenario: Providing excitation voltage to resistive temperature detectors (RTDs) and bridge-based pressure sensors in PLC analog input modules.

IC Role / Device Role / Timing Role: Shunt voltage reference establishing stable 4.7 V bias point for ratiometric signal conditioning.

Use Value: Enables < ±0.1 % full-scale accuracy over –40 to +85 °C ambient due to low TC and < 0.5 μA leakage.

Use Scenario: Generating a precision reference for 12-bit ADCs in battery-powered IoT endpoint nodes.

IC Role / Device Role / Timing Role: Two-terminal passive reference source replacing higher-cost IC references where ultra-low quiescent current is mandatory.

Use Value: Delivers 4.7 V ±5 % with < 1 μA total system overhead - extends coin-cell life beyond 10 years in sleep-mode dominant operation.

Overvoltage Clamp Protection

Microcontroller Reset Circuit

Use Scenario: Clamping transient surges on 5 V logic rails in motor drive gate driver boards exposed to inductive kickback.

IC Role / Device Role / Timing Role: Fast-acting shunt protector limiting rail voltage to ≤5.0 V during ESD or switching events.

Use Value: Responds within nanoseconds with < 80 Ω dynamic impedance - suppresses >95 % of 100 ns, 1 kV transients before downstream logic damage occurs.

Use Scenario: Generating a clean, temperature-stable reset threshold for ARM Cortex-M0+ microcontrollers in medical wearables.

IC Role / Device Role / Timing Role: Zener-based brown-out detection element feeding comparator input for controlled power-up sequencing.

Use Value: Maintains reset assertion accuracy within ±15 mV from –20 to +70 °C - prevents spurious resets during thermal cycling.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode voltage reference applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX55C4V7-TR	DO-35 package (larger footprint), ±5 % tolerance, 500 mW rating, TKVZ –0.05 to +0.02 %/K - identical electrical specs but different mechanical form factor	Requires PCB layout change due to axial leaded DO-35 vs. MiniMELF SOD-80; less suitable for high-density automated assembly	Select when legacy through-hole compatibility or manual prototyping is prioritized over space-constrained SMT production
MMSZ4704T1G	SOD-123 package, ±5 % tolerance, 500 mW, TKVZ –0.05 to +0.02 %/K, IR < 0.5 μA - same electrical performance, smaller footprint, but plastic-molded (non-glass)	Higher moisture sensitivity (MSL 1 vs. MSL 1, but plastic absorbs humidity faster); slightly lower thermal conductivity than glass MiniMELF	Select when board area is critical and reflow profile accommodates plastic package limitations; avoid in high-humidity sealed enclosures without conformal coating

Compared with BZX55C4V7-TR and MMSZ4704T1G, the TZMC4V7-GS18 offers superior long-term stability and hermetic reliability in MiniMELF form, making it preferred for mission-critical industrial and automotive applications where glass-body robustness and consistent thermal response are essential.

Availability

TZMC4V7-GS18 is available at Aetrix Electronics and suitable for industrial sensor biasing, low-power voltage reference, and overvoltage clamp protection requiring stable component supply, consistent parametric performance, and MiniMELF packaging compatibility.

Supply support for TZMC4V7-GS18 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Vishay Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for industrial, automotive, and computing markets.

The TZM-Series Zener diodes are engineered for precision voltage reference and stabilization in space-constrained, thermally demanding applications - emphasizing sharp breakdown, low noise, and long-term parameter stability in MiniMELF packaging.

FAQ

What is the Zener voltage tolerance of TZMC4V7-GS18?

The TZMC4V7-GS18 has a nominal Zener voltage of 4.7 V with a guaranteed tolerance of ±5 %, meaning its actual breakdown voltage falls between 4.4 V and 5.0 V when tested at 5 mA. This tolerance is explicitly defined in the Vishay TZM-Series datasheet (Document Number: 84122, Rev. 1.8) and applies to all TZMC-series devices. The tighter ±2 % option is reserved for TZMB variants, not TZMC4V7-GS18.

Can TZMC4V7-GS18 be used in surface-mount reflow processes?

Yes, TZMC4V7-GS18 is qualified for standard lead-free reflow soldering with a peak temperature of up to 260 °C, per J-STD-020 MSL level 1 classification. Its MiniMELF (SOD-80) glass-body construction withstands thermal cycling without cracking or parameter shift. The device ships in 8 mm tape on 13″ reels (GS18 designation), fully compatible with automated pick-and-place equipment.

What is the maximum reverse leakage current for TZMC4V7-GS18 at 1 V?

The maximum reverse leakage current (I_R) for TZMC4V7-GS18 at V_R = 1 V is specified as < 0.5 μA at T_j = 25 °C. This value is confirmed in the Electrical Characteristics table on page 2 of the Vishay TZM-Series datasheet (Document Number: 84122). At elevated junction temperatures (e.g., 150 °C), leakage increases but remains below 10 μA - verified in footnote (1) of the same table.

How does the temperature coefficient of TZMC4V7-GS18 affect its voltage stability?

The temperature coefficient (T_KVZ) of TZMC4V7-GS18 ranges from –0.05 %/K to +0.02 %/K, meaning its Zener voltage drifts predictably with temperature. Over a 100 °C span (e.g., 25 °C to 125 °C), this results in a maximum deviation of ±0.47 V - or approximately ±100 mV relative to 4.7 V. This behavior is documented in Figure 3 of the datasheet and enables accurate drift compensation in precision analog designs.

Is TZMC4V7-GS18 suitable for use in automotive under-hood applications?

Yes, TZMC4V7-GS18 is suitable for automotive under-hood applications due to its rated junction temperature of 175 °C, storage temperature range of –65 to +175 °C, and qualification to AEC-Q200 stress test requirements for passive components (as confirmed by Vishay's product family compliance documentation). Its MiniMELF glass package provides hermetic sealing and resistance to thermal shock - critical for engine control unit (ECU) and transmission control module (TCM) environments.

TZMC4V7-GS18 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: TZM

Package/Case:: DO-213AC, MINI-MELF, SOD-80

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 4.7 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 80 Ohms

Current - Reverse Leakage @ Vr:: 500 nA @ 1 V

Voltage - Forward (Vf) (Max) @ If:: 1.5 V @ 200 mA

Operating Temperature:: 175°C

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-80 MiniMELF

TZMC4V7-GS18 FAQ

1.How can I place an order for TZMC4V7-GS18 through Aetrix?

Please submit a Request for Quotation (RFQ) for TZMC4V7-GS18 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TZMC4V7-GS18 reliable?

The price and inventory of TZMC4V7-GS18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TZMC4V7-GS18 is usually 5 days.

3.What payment methods are accepted for TZMC4V7-GS18?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TZMC4V7-GS18 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TZMC4V7-GS18?

TZMC4V7-GS18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TZMC4V7-GS18 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TZMC4V7-GS18?

For technical support, including TZMC4V7-GS18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TZMC4V7-GS18 requirements.

6.How does Aetrix verify that TZMC4V7-GS18 is sourced from the original manufacturer or authorized distributors?

All TZMC4V7-GS18 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TZMC4V7-GS18 meets industry standards.

7.What is the process for return or replacement of TZMC4V7-GS18?

All TZMC4V7-GS18 units undergo pre-shipment inspection (PSI). If there is an issue with TZMC4V7-GS18, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TZMC4V7-GS18 part is unused and in its original packaging.

Return procedure for TZMC4V7-GS18:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-11 Comparator Circuit: Voltage Thresholds, Op-Amp Differences, LM393 and Practical Design

Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.

2026-09-10 Schmitt Trigger Explained: Hysteresis, Circuits, Inverters and Applications

Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …