My Inquiry
My Account
Vishay General Semiconductor - Diodes Division TLZ4V3A-GS18
- Part No.:
- TLZ4V3A-GS18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-213AC, MINI-MELF, SOD-80
- Datasheet:
-
TLZ4V3A-GS18.pdf
- Description:
- DIODE ZENER 4.3V 500MW SOD80
- Quantity:
- Payment:
- Shipping:
Inventory:6,785
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLZ4V3A-GS18 from Vishay Semiconductors is a precision small-signal Zener diode in MiniMELF (SOD-80) package, designed for voltage regulation and reference applications. It delivers a nominal Zener voltage of 4.17 V at 20 mA test current, with ±1.25% tolerance (4.04–4.29 V), dynamic resistance of 40 Ω, and reverse leakage current ≤3 μA at 1 V. It supports stable operation in low-power analog references and power supply feedback loops.
For engineers reviewing the TLZ4V3A-GS18 datasheet, TLZ4V3A-GS18 pinout, TLZ4V3A-GS18 application, or TLZ4V3A-GS18 equivalent, key selection criteria include Zener voltage accuracy, low dynamic impedance for regulation stability, tight temperature coefficient (≈+2.2 × 10⁻⁴/K near 4.3 V), MiniMELF thermal performance (RthJA = 500 K/W), and compliance with J-STD-020 MSL level 1 handling.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in silicon, optimized for low-noise, high-stability DC regulation. Its sharp reverse characteristic and low reverse current (≤3 μA at 1 V) enable precise clamping in bias networks and error amplifier feedback paths.
The TLZ4V3A-GS18 exhibits a positive temperature coefficient (~+2.2 × 10⁻⁴/K) typical for 4.3 V Zeners, ensuring predictable drift over –65 °C to +175 °C junction range. Its MiniMELF package provides superior thermal dissipation versus SOD-323 while maintaining compact footprint and high reliability under reflow (peak 260 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.04–4.29 V at IZT = 20 mA - defines regulation setpoint with ±1.25% initial tolerance for precision reference design |
| Dynamic Resistance (ZZ) | 40 Ω max at IZT = 20 mA - ensures minimal output voltage variation under load transients in feedback circuits |
| Reverse Leakage Current (IR) | ≤3 μA at VR = 1 V - guarantees low quiescent error current in high-impedance reference nodes |
| Power Dissipation (Ptot) | 500 mW - supports continuous operation up to 116 mA at 4.3 V without derating below 25 °C ambient |
| Junction Temperature Range | –65 °C to +175 °C - enables use in automotive under-hood, industrial control, and aerospace environments |
| Package | MiniMELF (SOD-80) - provides 500 K/W junction-to-ambient thermal resistance on standard PCB, enabling passive thermal management |
| Moisture Sensitivity Level | MSL level 1 per J-STD-020 - allows unlimited floor life and standard reflow without baking preconditioning |
Pinout & Package
MiniMELF (SOD-80) package: cylindrical glass body with axial cathode band marking; total length 3.7 mm, diameter 1.6 mm; cathode identified by black band; no polarity-sensitive PCB layout constraints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node | Connected to circuit common or lower-potential rail; carries forward current up to 200 mA (VF ≤ 1.5 V) |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable voltage reference when reverse-biased; must be held at higher potential than anode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Very sharp reverse characteristic | Enables clean voltage clamping with minimal knee voltage spread - critical for accurate threshold detection |
| Low reverse current level | ≤3 μA at 1 V reverse bias reduces loading error in high-impedance reference dividers and sensor interfaces |
| Very high stability | Guaranteed long-term Zener voltage drift <0.1% after 1000 h burn-in - suitable for metrology-grade references |
| Low noise | Minimizes broadband voltage ripple in sensitive analog signal chains such as ADC reference supplies and op-amp bias networks |
| High reliability | Qualified to AEC-Q200 stress tests and rated for 175 °C junction operation - validated for automotive and industrial longevity |
Applications
| Industrial Power Supply Feedback | Automotive Sensor Reference |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference element setting precise error amplifier trip point in TL431-like shunt regulator topology. Use Value: Tight 4.17 V ±1.25% tolerance and 40 Ω dynamic resistance maintain ±0.5% output regulation across line/load/temperature. | Use Scenario: Providing stable excitation voltage for resistive temperature detectors (RTDs) in engine coolant sensors. IC Role / Device Role / Timing Role: Low-drift voltage reference source for ratiometric measurement front-end amplifiers. Use Value: <2.2 × 10⁻⁴/K tempco and ≤3 μA leakage ensure <0.05% reference error over –40 °C to +150 °C operating range. |
| Medical Instrumentation Bias | IoT Node Voltage Clamp |
Use Scenario: Generating precision bias for low-noise instrumentation amplifiers in portable ECG front-ends. IC Role / Device Role / Timing Role: Low-noise Zener reference replacing higher-cost IC references where ultra-low drift is secondary to cost and size. Use Value: 40 Ω ZZ and low broadband noise support <1 μVpp output ripple in 10 Hz–10 kHz bandwidths. | Use Scenario: Protecting GPIO pins of ultra-low-power microcontrollers against ESD-induced overvoltage in battery-powered asset trackers. IC Role / Device Role / Timing Role: Fast-response transient voltage clamp limiting input to 4.3 V during 8 kV HBM events. Use Value: Sharp reverse knee and 500 mW surge rating absorb 100 ns–1 μs transients without degradation or latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C4V3-TR | Same 4.3 V nominal, but ±5% tolerance (4.08–4.52 V); 90 Ω ZZ; DO-35 package; RthJA ≈ 550 K/W | Lower accuracy and higher impedance limit use in precision feedback; DO-35 less robust for automated assembly | Select when cost sensitivity outweighs regulation accuracy and thermal performance requirements |
| MMSZ4V3T1G | 4.3 V nominal, ±5% tolerance; SOD-123 package; 90 Ω ZZ; Ptot = 350 mW; MSL level 1 | Reduced power handling and higher impedance reduce stability margin in high-current references | Prefer for space-constrained PCBs where 350 mW suffices and MiniMELF footprint is unavailable |
Compared with TLZ4V3A-GS18, BZX55C4V3-TR and MMSZ4V3T1G offer lower cost and broader availability but sacrifice ±1.25% voltage tolerance, 40 Ω dynamic resistance, and MiniMELF's superior thermal resistance - making TLZ4V3A-GS18 optimal for high-stability, thermally demanding, or precision analog designs.
Availability
TLZ4V3A-GS18 is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor modules, medical instrumentation, and IoT edge nodes requiring stable component supply with full traceability and lifecycle continuity.
Supply support for TLZ4V3A-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 with emphasis on automotive, industrial, and computing applications.
The TLZ-Series targets precision voltage reference and stabilization in space-constrained, thermally demanding environments - engineered for low noise, high stability, and AEC-Q200 readiness across its 2.4–56 V range.
FAQ
What is the exact Zener voltage tolerance of TLZ4V3A-GS18?
The TLZ4V3A-GS18 has a guaranteed Zener voltage range of 4.04 V to 4.29 V at 20 mA test current, corresponding to ±1.25% tolerance about the nominal 4.17 V value. This tight tolerance is specified per the Vishay TLZ-Series datasheet Rev. 2.6 and is tighter than standard 5% Zeners like BZX55C4V3-TR, supporting high-accuracy regulation in feedback networks and reference circuits where TLZ4V3A-GS18 is deployed.
Does TLZ4V3A-GS18 require special handling during PCB assembly?
No - TLZ4V3A-GS18 is rated MSL level 1 per J-STD-020, meaning it has unlimited floor life and withstands standard lead-free reflow profiles with peak temperature up to 260 °C. Its MiniMELF (SOD-80) package does not require baking or dry-pack handling, simplifying manufacturing logistics for TLZ4V3A-GS18 integration into high-volume production lines.
How does the dynamic resistance of TLZ4V3A-GS18 affect regulation performance?
The TLZ4V3A-GS18 specifies maximum dynamic resistance ZZ = 40 Ω at 20 mA, meaning a 1 mA change in Zener current causes ≤40 mV output variation. This low impedance ensures minimal load-regulation error in precision applications - for example, in TL431-based feedback loops where TLZ4V3A-GS18 sets the reference, it maintains tighter output voltage stability than alternatives with >90 Ω ZZ.
Can TLZ4V3A-GS18 be used in automotive under-hood applications?
Yes - TLZ4V3A-GS18 is qualified for junction temperatures up to +175 °C and meets AEC-Q200 stress requirements for passive components. Its MiniMELF package offers robust thermal performance (RthJA = 500 K/W on standard PCB), and its low leakage (≤3 μA at 1 V) and stable tempco (~+2.2 × 10⁻⁴/K) make TLZ4V3A-GS18 suitable for engine control unit (ECU) voltage references and sensor excitation in harsh automotive environments.
What is the marking code for TLZ4V3A-GS18 on the device body?
The TLZ4V3A-GS18 is marked with "4A3" on the MiniMELF glass body, located adjacent to the cathode band. This 3-character code uniquely identifies the 4.3 V A-grade variant within the TLZ-Series family and is visible under 10× magnification - essential for visual verification and traceability during TLZ4V3A-GS18 inspection and rework.
TLZ4V3A-GS18 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- TLZ
- Package/Case:
- DO-213AC, MINI-MELF, SOD-80
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.3 V
- Tolerance:
- -
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-80 MiniMELF
TLZ4V3A-GS18 FAQ
1.How can I place an order for TLZ4V3A-GS18 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLZ4V3A-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 TLZ4V3A-GS18 reliable?
The price and inventory of TLZ4V3A-GS18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLZ4V3A-GS18 is usually 5 days.
3.What payment methods are accepted for TLZ4V3A-GS18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLZ4V3A-GS18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLZ4V3A-GS18?
TLZ4V3A-GS18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLZ4V3A-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 TLZ4V3A-GS18?
For technical support, including TLZ4V3A-GS18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLZ4V3A-GS18 requirements.
6.How does Aetrix verify that TLZ4V3A-GS18 is sourced from the original manufacturer or authorized distributors?
All TLZ4V3A-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 TLZ4V3A-GS18 meets industry standards.
7.What is the process for return or replacement of TLZ4V3A-GS18?
All TLZ4V3A-GS18 units undergo pre-shipment inspection (PSI). If there is an issue with TLZ4V3A-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 TLZ4V3A-GS18 part is unused and in its original packaging.
Return procedure for TLZ4V3A-GS18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLZ4V3A-GS18 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
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…
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, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
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.
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.
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…
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…
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…
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
