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

Vishay General Semiconductor - Diodes Division TZMC3V0-GS18

Name: TZMC3V0-GS18
Brand: Vishay General Semiconductor - Diodes Division
SKU: TZMC3V0-GS18
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TZMC3V0-GS18

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Zener Diodes

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

Datasheet:: TZMC3V0-GS18.pdf

Description:: DIODE ZENER 3V 500MW SOD80

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Inventory:7,090

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Product details

Overview

TZMC3V0-GS18 from Vishay Semiconductors is a precision 3.0 V ±5 % Zener diode in MiniMELF (SOD-80) package, designed for voltage reference and stabilization in low-power analog circuits, power supply feedback loops, and overvoltage protection. It delivers 5 mA test current, <4 μA reverse leakage at 1 V, <90 Ω dynamic resistance, and temperature coefficient of –0.08 to –0.05 %/K.

For engineers reviewing the TZMC3V0-GS18 datasheet, TZMC3V0-GS18 pinout, TZMC3V0-GS18 application, or TZMC3V0-GS18 equivalent, this device serves as a stable, low-noise, high-stability voltage reference with sharp reverse breakdown and minimal thermal drift in space-constrained PCB layouts.

Technical Context

The TZMC3V0-GS18 operates as a single-element, silicon planar Zener diode with controlled avalanche breakdown at nominal 3.0 V. Its design emphasizes low noise, high stability under pulse and DC bias, and tight ±5 % V_Z tolerance at I_ZT = 5 mA.

It exhibits a negative temperature coefficient (–0.08 to –0.05 %/K), confirming its suitability for low-voltage reference applications where predictable thermal behavior is required. The device is rated for P_tot = 500 mW and operates across T_stg = –65 to +175 °C with MSL level 1 handling.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	2.8 V min. to 3.2 V max. at I_ZT = 5 mA - ensures precise 3.0 V regulation within ±5 % tolerance for feedback and reference use.
Reverse Leakage (I_R)	<4 μA at V_R = 1 V - minimizes standby current loss in battery-powered or low-quiescent circuits.
Dynamic Resistance (Z_Z)	<90 Ω at I_ZT = 5 mA - provides low impedance voltage source for stable regulation under load variation.
Power Dissipation (P_tot)	500 mW - supports continuous operation in compact SOD-80 packages without forced cooling on standard FR-4 PCBs.
Temperature Coefficient (T_KVZ)	–0.08 to –0.05 %/K - enables predictable, monotonic V_Z drift for calibration-critical references below 5 V.
Junction Temperature (T_j)	175 °C maximum - allows reliable operation in industrial and automotive under-hood environments.
Package	MiniMELF (SOD-80) - cylindrical glass-body surface-mount package with cathode band marking, optimized for automated placement and thermal performance.

Pinout & Package

MiniMELF (SOD-80) package: cylindrical glass body with axial cathode band marking; no polarity-specific pins-cathode identified by band, anode is unmarked end. Designed for reflow soldering per J-STD-020 MSL level 1 (peak 260 °C).

Pin/Terminal	Circuit Role	Design Meaning
Cathode (banded end)	Zener breakdown terminal	Connected to regulated output node; reverse-biased during normal operation to maintain fixed V_Z.
Anode (unmarked end)	Reference ground/reference return	Typically tied to system ground or feedback divider low-side; completes Zener conduction path.

Key Features

Feature	Design Value
Very sharp reverse characteristic	Enables clean, well-defined breakdown onset - critical for precision clamping and reference accuracy.
Low reverse current level (<4 μA @ 1 V)	Reduces quiescent power draw in always-on monitoring circuits and extends battery life in portable systems.
Very high stability (±5 % V_Z tolerance)	Eliminates need for post-assembly trimming in production-grade voltage references and feedback networks.
Low noise performance	Minimizes voltage perturbation in sensitive analog signal chains, ADC references, and sensor excitation circuits.
UL 94 V-0 molding compound	Ensures flame-retardant reliability in safety-critical industrial and power supply applications.

Applications

Power Supply Feedback	Overvoltage Protection
Use Scenario: Regulating output voltage in isolated flyback or buck converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference element setting error amplifier threshold; replaces TL431 in ultra-low-current designs. Use Value: Delivers stable 3.0 V reference with <90 Ω Z_Z, enabling accurate feedback without external biasing resistors.	Use Scenario: Clamping transient surges on 3.3 V I/O lines in microcontroller peripherals or sensor interfaces. IC Role / Device Role / Timing Role: Standby-mode shunt protector activated only above 3.2 V, diverting excess energy to ground. Use Value: Sub-4 μA leakage preserves signal integrity during normal operation while responding rapidly to >3.2 V events.
Low-Power Reference	Calibration Standard
Use Scenario: Providing reference voltage for 12-bit SAR ADCs in battery-operated data loggers. IC Role / Device Role / Timing Role: Primary voltage reference source for ADC internal comparator and DAC-based offset correction. Use Value: –0.08 %/K TC and <500 mW rating ensure <0.5 % full-scale drift over –40 to +85 °C ambient range.	Use Scenario: Factory-trimmed reference in handheld multimeters and portable test equipment. IC Role / Device Role / Timing Role: Stable 3.0 V anchor point for digital-to-analog conversion and auto-zero circuitry. Use Value: ±5 % initial tolerance and high long-term stability reduce calibration frequency and improve measurement repeatability.

Power Supply Feedback

Overvoltage Protection

Use Scenario: Regulating output voltage in isolated flyback or buck converters via optocoupler-coupled feedback loop.

IC Role / Device Role / Timing Role: Zener reference element setting error amplifier threshold; replaces TL431 in ultra-low-current designs.

Use Value: Delivers stable 3.0 V reference with <90 Ω Z_Z, enabling accurate feedback without external biasing resistors.

Use Scenario: Clamping transient surges on 3.3 V I/O lines in microcontroller peripherals or sensor interfaces.

IC Role / Device Role / Timing Role: Standby-mode shunt protector activated only above 3.2 V, diverting excess energy to ground.

Use Value: Sub-4 μA leakage preserves signal integrity during normal operation while responding rapidly to >3.2 V events.

Low-Power Reference

Calibration Standard

Use Scenario: Providing reference voltage for 12-bit SAR ADCs in battery-operated data loggers.

IC Role / Device Role / Timing Role: Primary voltage reference source for ADC internal comparator and DAC-based offset correction.

Use Value: –0.08 %/K TC and <500 mW rating ensure <0.5 % full-scale drift over –40 to +85 °C ambient range.

Use Scenario: Factory-trimmed reference in handheld multimeters and portable test equipment.

IC Role / Device Role / Timing Role: Stable 3.0 V anchor point for digital-to-analog conversion and auto-zero circuitry.

Use Value: ±5 % initial tolerance and high long-term stability reduce calibration frequency and improve measurement repeatability.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX55C3V0 (ON Semiconductor)	Same 3.0 V ±5 %, but DO-35 package (larger, axial lead); higher R_thJA (600 K/W) and lower P_tot (500 mW same, but derates faster).	Requires through-hole assembly; less suitable for high-density SMT layouts or automated pick-and-place.	Select when legacy DO-35 footprint compatibility or manual prototyping is prioritized over miniaturization.
MMSZ4684 (Diodes Inc.)	SOD-123 package; same 3.0 V ±5 %, but higher I_R (≤10 μA @ 1 V) and wider Z_Z range (≤100 Ω).	Higher leakage limits use in ultra-low-power sleep modes; slightly reduced regulation precision under load variation.	Choose for cost-sensitive, high-volume consumer designs where SOD-123 footprint and RoHS compliance are mandatory.

Compared with BZX55C3V0 and MMSZ4684, TZMC3V0-GS18 offers superior thermal performance in MiniMELF (R_thJA = 500 K/W), tighter leakage (<4 μA), and sharper knee - making it optimal for precision SMT reference and protection roles where board space and regulation fidelity are constrained.

Availability

TZMC3V0-GS18 is available at Aetrix Electronics and suitable for voltage reference, power supply feedback, and overvoltage protection applications requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for TZMC3V0-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, and optoelectronics for industrial, automotive, and computing markets.

The TZM-Series Zener diodes are engineered for precision voltage reference and stabilization in compact, high-stability applications - emphasizing low noise, sharp breakdown, and extended temperature operation.

FAQ

What is the exact Zener voltage tolerance for TZMC3V0-GS18?

The TZMC3V0-GS18 has a nominal Zener voltage of 3.0 V with a guaranteed tolerance of ±5 %, meaning the actual V_Z falls between 2.8 V and 3.2 V when measured at I_ZT = 5 mA and T_A = 25 °C. This tolerance is specified per the TZMC series designation and confirmed in Vishay document 84122, Table on page 2.

Does TZMC3V0-GS18 support reflow soldering, and what are the peak temperature limits?

Yes, TZMC3V0-GS18 is qualified for lead-free reflow soldering per J-STD-020. Its MiniMELF (SOD-80) package has a maximum peak temperature rating of 260 °C, with MSL level 1 classification - meaning it can be stored indefinitely at ≤30 °C/60 % RH without baking prior to assembly.

What is the maximum reverse leakage current for TZMC3V0-GS18 at 1 V reverse bias?

The maximum reverse leakage current (I_R) for TZMC3V0-GS18 is <4 μA when measured at V_R = 1 V and T_j = 25 °C. This value is specified in the Electrical Characteristics table (page 2 of doc 84122) and reflects its suitability for ultra-low-power standby circuits.

How does the temperature coefficient of TZMC3V0-GS18 affect its performance in a 0–70 °C operating range?

The TZMC3V0-GS18 has a temperature coefficient (T_KVZ) of –0.08 to –0.05 %/K. Over 0–70 °C (ΔT = 70 K), this results in a maximum V_Z shift of approximately –0.112 V to –0.07 V - i.e., from ~3.0 V down to ~2.89–2.93 V - enabling predictable, monotonic drift for calibration-aware designs.

Is TZMC3V0-GS18 suitable for use as a replacement for TL431 in low-current feedback applications?

Yes, TZMC3V0-GS18 can serve as a passive, two-terminal alternative to TL431 in ultra-low-current feedback paths (e.g., <100 μA total bias), where its 3.0 V reference, <4 μA leakage, and <90 Ω Z_Z provide sufficient accuracy without requiring external bias or compensation components - though it lacks active regulation or adjustable output.

TZMC3V0-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):: 3 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 90 Ohms

Current - Reverse Leakage @ Vr:: 4 µA @ 1 V

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

Operating Temperature:: -65°C ~ 175°C

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-80 MiniMELF

TZMC3V0-GS18 FAQ

1.How can I place an order for TZMC3V0-GS18 through Aetrix?

Please submit a Request for Quotation (RFQ) for TZMC3V0-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 TZMC3V0-GS18 reliable?

The price and inventory of TZMC3V0-GS18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TZMC3V0-GS18 is usually 5 days.

3.What payment methods are accepted for TZMC3V0-GS18?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TZMC3V0-GS18 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TZMC3V0-GS18?

TZMC3V0-GS18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TZMC3V0-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 TZMC3V0-GS18?

For technical support, including TZMC3V0-GS18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TZMC3V0-GS18 requirements.

6.How does Aetrix verify that TZMC3V0-GS18 is sourced from the original manufacturer or authorized distributors?

All TZMC3V0-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 TZMC3V0-GS18 meets industry standards.

7.What is the process for return or replacement of TZMC3V0-GS18?

All TZMC3V0-GS18 units undergo pre-shipment inspection (PSI). If there is an issue with TZMC3V0-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 TZMC3V0-GS18 part is unused and in its original packaging.

Return procedure for TZMC3V0-GS18:

1.Submit a request within 90 days.

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

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