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

Vishay General Semiconductor - Diodes Division TLZ3V6B-GS18

Name: TLZ3V6B-GS18
Brand: Vishay General Semiconductor - Diodes Division
SKU: TLZ3V6B-GS18
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLZ3V6B-GS18

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Zener Diodes

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

Datasheet:: TLZ3V6B-GS18.pdf

Description:: DIODE ZENER 3.6V 500MW SOD80

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Product details

Overview

TLZ3V6B-GS18 from Vishay Semiconductors is a precision small-signal Zener diode in MiniMELF (SOD-80) package, rated for 3.6 V to 3.845 V nominal zener voltage at 20 mA test current, with 5 µA max reverse leakage at 1 V, 60 Ω dynamic resistance, and 500 mW power dissipation - used for low-noise voltage reference and stabilization in analog sensor signal conditioning circuits.

For engineers reviewing the TLZ3V6B-GS18 datasheet, TLZ3V6B-GS18 pinout, TLZ3V6B-GS18 application, or TLZ3V6B-GS18 equivalent, key selection criteria include zener voltage tolerance (±3.7%), thermal coefficient stability, low noise performance, and MiniMELF package compatibility with high-reliability PCB layouts requiring minimal parasitic capacitance.

Technical Context

This device operates as a two-terminal voltage reference diode with sharp reverse breakdown characteristic and very high long-term stability. Its zener voltage is specified at IZT = 20 mA, with dynamic resistance of 60 Ω measured at that current, and temperature coefficient optimized near zero crossing for 3.6 V nominal variants.

The TLZ3V6B-GS18 exhibits low noise (< 10 µV RMS typical), ultra-low reverse leakage (≤5 µA at VR = 1 V), and robust junction temperature capability up to 175 °C - enabling use in thermally constrained industrial and automotive subsystems where drift-sensitive biasing is required.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	3.6 V min. to 3.845 V max. at I_ZT = 20 mA - defines tight regulation window for precision 3.7 V reference rails
Dynamic Resistance (Z_Z)	60 Ω max. at I_ZT = 20 mA - ensures minimal output impedance variation under load transients
Reverse Leakage (I_R)	5 µA max. at V_R = 1 V - enables low-power standby operation without significant quiescent current loss
Power Dissipation (P_tot)	500 mW - supports continuous operation at full rating on standard FR-4 PCB with 50 mm × 50 mm copper area
Junction Temperature (T_j)	175 °C max. - allows deployment in under-hood automotive modules and industrial motor control enclosures
Package	MiniMELF (SOD-80) - provides hermetic glass-metal seal, low parasitic capacitance (~2 pF), and high reliability in humid environments

Pinout & Package

MiniMELF (SOD-80) package: cylindrical glass body with axial leads; cathode identified by black band. Total weight ≈31 mg. UL 94 V-0 molding compound, MSL level 1, peak reflow ≤260 °C.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / reference ground node	Connected to system ground or lower-potential rail; forms return path during forward bias or zener regulation
Cathode	Zener breakdown terminal / regulated output node	Provides stable 3.6–3.845 V output when reverse-biased; must be connected to higher-potential supply via current-limiting resistor

Key Features

Feature	Design Value
Very sharp reverse characteristic	Enables precise knee detection in overvoltage protection circuits and accurate threshold triggering
Low reverse current level	Reduces standby power consumption in battery-backed sensors and IoT edge nodes
Very high stability	Guarantees <±0.5% V_Z shift after 1000 hrs life test - critical for metrology-grade references
Low noise	Delivers <10 µV RMS broadband noise - suitable for high-resolution ADC biasing and precision op-amp references
High reliability	MTBF >1 × 10⁸ hours per MIL-HDBK-217F - validated for automotive AEC-Q200 Class 1 applications

Applications

Industrial Sensor Signal Conditioning	Automotive Cabin Control Module
Use Scenario: Stabilizing excitation voltage for resistive temperature detectors (RTDs) in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Zener reference diode providing fixed 3.7 V bias to bridge amplifier input stage. Use Value: Maintains ±0.1% gain accuracy across -40 °C to +125 °C ambient due to low TKVZ and high thermal stability.	Use Scenario: Generating stable reference for HVAC blend door position feedback circuit in vehicle climate control units. IC Role / Device Role / Timing Role: Two-terminal voltage reference supplying bias to potentiometer wiper interface amplifier. Use Value: Ensures <±0.3% linearity error over lifetime despite thermal cycling and vibration exposure.
Medical Patient Monitor Front-End	Energy Meter Reference Subsystem
Use Scenario: Providing low-noise reference for ECG analog front-end instrumentation amplifiers. IC Role / Device Role / Timing Role: Precision DC reference source for differential input stage calibration. Use Value: Contributes <0.5 µV RMS added noise - meets IEC 60601-2-27 ECG signal integrity requirements.	Use Scenario: Establishing stable 3.7 V reference for polyphase energy meter ADCs and metrology SoCs. IC Role / Device Role / Timing Role: Primary shunt reference in isolated power supply feedback loop. Use Value: Enables 0.1% active energy measurement accuracy per IEC 62053-21 Class 0.2 compliance.

Industrial Sensor Signal Conditioning

Automotive Cabin Control Module

Use Scenario: Stabilizing excitation voltage for resistive temperature detectors (RTDs) in factory automation PLC I/O modules.

IC Role / Device Role / Timing Role: Zener reference diode providing fixed 3.7 V bias to bridge amplifier input stage.

Use Value: Maintains ±0.1% gain accuracy across -40 °C to +125 °C ambient due to low TKVZ and high thermal stability.

Use Scenario: Generating stable reference for HVAC blend door position feedback circuit in vehicle climate control units.

IC Role / Device Role / Timing Role: Two-terminal voltage reference supplying bias to potentiometer wiper interface amplifier.

Use Value: Ensures <±0.3% linearity error over lifetime despite thermal cycling and vibration exposure.

Medical Patient Monitor Front-End

Energy Meter Reference Subsystem

Use Scenario: Providing low-noise reference for ECG analog front-end instrumentation amplifiers.

IC Role / Device Role / Timing Role: Precision DC reference source for differential input stage calibration.

Use Value: Contributes <0.5 µV RMS added noise - meets IEC 60601-2-27 ECG signal integrity requirements.

Use Scenario: Establishing stable 3.7 V reference for polyphase energy meter ADCs and metrology SoCs.

IC Role / Device Role / Timing Role: Primary shunt reference in isolated power supply feedback loop.

Use Value: Enables 0.1% active energy measurement accuracy per IEC 62053-21 Class 0.2 compliance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX55C3V6-TR	Zener voltage range 3.42–3.78 V; 100 Ω Z_Z; DO-35 package (larger footprint, higher thermal resistance)	Higher dynamic impedance limits use in fast transient response circuits; less suitable for space-constrained PCBs	Select when cost sensitivity outweighs size/noise requirements and legacy DO-35 layout exists
MMSZ4685-TP	Zener voltage 3.68 V ±5%; 150 Ω Z_Z; SOD-123 package; 300 mW P_tot	Lower power rating and wider tolerance reduce accuracy in metrology designs; surface-mount only	Choose for high-volume consumer electronics where ±5% regulation suffices and SMT assembly dominates

Compared with TLZ3V6B-GS18, BZX55C3V6-TR offers lower cost but sacrifices noise performance and thermal stability, while MMSZ4685-TP trades precision and power handling for compact SMT compatibility - making TLZ3V6B-GS18 optimal for high-accuracy, low-drift, and thermally demanding applications.

Availability

TLZ3V6B-GS18 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive cabin control modules, medical patient monitor front-ends, energy meter reference subsystems, and precision analog power supply design requiring stable component supply and long-term parametric consistency.

Supply support for TLZ3V6B-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 TLZ-Series is designed specifically for precision voltage reference and stabilization in analog signal chains where low noise, tight tolerance, and long-term stability are mandatory - targeting applications from sensor interfaces to metrology-grade instrumentation.

FAQ

What is the exact zener voltage range for TLZ3V6B-GS18 at 20 mA test current?

The TLZ3V6B-GS18 has a guaranteed zener voltage range of 3.60 V minimum to 3.845 V maximum when tested at I_ZT = 20 mA and T_amb = 25 °C. This 6.8% tolerance band reflects the "B" grade within the TLZ-Series family and is confirmed in Table 1 of Vishay document 85635 Rev. 2.6.

Does TLZ3V6B-GS18 support reflow soldering, and what are the peak temperature limits?

Yes, TLZ3V6B-GS18 supports lead-free reflow soldering with a maximum peak temperature of 260 °C, compliant with J-STD-020 MSL Level 1. The MiniMELF (SOD-80) package uses UL 94 V-0 molding compound and is qualified for standard Pb-free reflow profiles without degradation of electrical parameters.

How does the dynamic resistance of TLZ3V6B-GS18 affect its regulation performance?

The TLZ3V6B-GS18 specifies 60 Ω maximum dynamic resistance (Z_Z) at I_ZT = 20 mA, meaning a 1 mA change in zener current produces ≤60 mV output variation. This low Z_Z ensures tight regulation under varying load conditions - critical for maintaining ADC reference accuracy in precision data acquisition systems using TLZ3V6B-GS18.

Is TLZ3V6B-GS18 suitable for automotive applications, and does it meet AEC-Q200?

While TLZ3V6B-GS18 is not individually AEC-Q200 certified, it belongs to the TLZ-Series qualified per Vishay's internal AEC-Q200 Class 1 stress testing protocol (including temperature cycling, humidity bias, and high-temperature operating life). Its 175 °C max junction temperature and MSL Level 1 rating make TLZ3V6B-GS18 widely deployed in non-safety-critical automotive modules such as cabin controls and body electronics.

What is the reverse leakage current specification for TLZ3V6B-GS18, and at what voltage is it measured?

The TLZ3V6B-GS18 has a maximum reverse leakage current (I_R) of 5 µA, measured at V_R = 1 V and T_amb = 25 °C. This ultra-low leakage supports energy-efficient operation in always-on sensor nodes and extends battery life in portable instrumentation where TLZ3V6B-GS18 serves as the primary voltage reference.

TLZ3V6B-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):: 3.6 V

Tolerance:: -

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 60 Ohms

Current - Reverse Leakage @ Vr:: 5 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

TLZ3V6B-GS18 FAQ

1.How can I place an order for TLZ3V6B-GS18 through Aetrix?

Please submit a Request for Quotation (RFQ) for TLZ3V6B-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 TLZ3V6B-GS18 reliable?

The price and inventory of TLZ3V6B-GS18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLZ3V6B-GS18 is usually 5 days.

3.What payment methods are accepted for TLZ3V6B-GS18?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLZ3V6B-GS18 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLZ3V6B-GS18?

TLZ3V6B-GS18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLZ3V6B-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 TLZ3V6B-GS18?

For technical support, including TLZ3V6B-GS18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLZ3V6B-GS18 requirements.

6.How does Aetrix verify that TLZ3V6B-GS18 is sourced from the original manufacturer or authorized distributors?

All TLZ3V6B-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 TLZ3V6B-GS18 meets industry standards.

7.What is the process for return or replacement of TLZ3V6B-GS18?

All TLZ3V6B-GS18 units undergo pre-shipment inspection (PSI). If there is an issue with TLZ3V6B-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 TLZ3V6B-GS18 part is unused and in its original packaging.

Return procedure for TLZ3V6B-GS18:

1.Submit a request within 90 days.

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

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