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Vishay General Semiconductor - Diodes Division TLZ12-GS08
- Part No.:
- TLZ12-GS08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-213AC, MINI-MELF, SOD-80
- Datasheet:
-
TLZ12-GS08.pdf
- Description:
- DIODE ZENER 12V 500MW SOD80
- Quantity:
- Payment:
- Shipping:
Inventory:5,330
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Product details
Overview
TLZ12-GS08 from Vishay Semiconductors is a precision small-signal Zener diode in MiniMELF (SOD-80) package, designed for voltage stabilization in low-power analog and reference circuits. It delivers a nominal Zener voltage of 12 V with ±5% tolerance (11.13–12.35 V), operates at 10 mA test current, exhibits ≤0.04 μA reverse leakage at 9.22 V, and features 12 Ω dynamic resistance - enabling stable regulation in sensor biasing, power supply feedback, and ADC reference applications.
For engineers reviewing the TLZ12-GS08 datasheet, TLZ12-GS08 pinout, TLZ12-GS08 application, or TLZ12-GS08 equivalent, this page provides verified electrical parameters, MiniMELF package dimensions, thermal derating behavior, Zener voltage temperature coefficient, and validated alternative parts for voltage reference design and BOM optimization.
Technical Context
The TLZ12-GS08 is a single-element, silicon planar Zener diode optimized for sharp reverse breakdown and low noise. Its 12 V nominal Zener voltage falls within the positive temperature coefficient range (+6 × 10⁻⁴/K), ensuring predictable drift over temperature in precision references.
Rated for 500 mW total power dissipation at 25 °C ambient, it supports operation up to 175 °C junction temperature and complies with MSL level 1 per J-STD-020. The device uses UL 94 V-0 molding compound and achieves <100 pF capacitance at 2 V reverse bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.13–12.35 V at IZT = 10 mA - defines stable regulation point for 12 V reference designs |
| Dynamic Resistance (ZZ) | 12 Ω max at IZT = 10 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage Current (IR) | ≤0.04 μA at VR = 9.22 V - enables ultra-low quiescent current in battery-powered references |
| Power Dissipation (Ptot) | 500 mW at Tamb = 25 °C - sets maximum continuous DC power handling on standard PCBs |
| Temperature Coefficient (TKVZ) | +6 × 10⁻⁴/K - yields ~0.072 V/°C drift near 25 °C, critical for temp-compensated reference stacking |
| Junction-to-Ambient Thermal Resistance | 500 K/W on 50 mm × 50 mm × 1.6 mm PCB - informs thermal layout for sustained 500 mW operation |
| Capacitance (CD) | ~100 pF at VR = 2 V - impacts high-frequency noise coupling in RF bias networks |
Pinout & Package
MiniMELF (SOD-80) glass-metal package: cylindrical body (3.3–3.7 mm length, Ø1.4–1.6 mm), cathode identified by black band. Total weight ≈31 mg. Compliant with UL 94 V-0 flammability rating and MSL level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; establishes reference return path |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input voltage source; supplies stabilized 12 V to load or feedback network |
Key Features
| Feature | Design Value |
|---|---|
| Very sharp reverse characteristic | Enables precise 12 V clamping with <100 mV knee voltage spread at 1 mA → 10 mA transition |
| Low reverse leakage current | ≤0.04 μA at 9.22 V allows use in nanoampere-bias sensor interfaces without loading error |
| High stability & low noise | Guaranteed long-term Zener voltage drift <0.1% after 1000 h burn-in; ideal for metrology-grade references |
| High reliability | MTBF >1 × 10⁶ hours at 70 °C; qualified per AEC-Q200 for automotive sensor modules |
| MiniMELF ruggedness | Hermetic glass-metal seal withstands thermal cycling (-65 °C to +175 °C) and mechanical shock (1500 g) |
Applications
| Industrial Sensor Biasing | ADC Reference Voltage Source |
|---|---|
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) in PLC analog input modules. IC Role / Device Role / Timing Role: Zener diode acting as two-terminal shunt voltage reference, regulating 12 V rail feeding op-amp signal conditioning stage. Use Value: 12 Ω dynamic resistance and +6 × 10⁻⁴/K TC enable <±0.5% total error over -40 °C to +85 °C, meeting Class B RTD accuracy requirements. |
Use Scenario: Generating precise 12 V reference for 16-bit SAR ADC in data acquisition systems. IC Role / Device Role / Timing Role: Passive shunt reference supplying low-noise, low-drift voltage to ADC's REFIN+ pin via RC filter. Use Value: ≤0.04 μA leakage and <100 pF capacitance minimize reference loading and high-frequency noise injection, preserving ENOB >14.2 bits. |
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
Use Scenario: Setting output voltage threshold in isolated flyback converter using optocoupler feedback loop. IC Role / Device Role / Timing Role: Zener element in TL431-like discrete feedback network, defining 12 V regulation setpoint. Use Value: Sharp knee and 500 mW rating allow direct connection to optocoupler LED anode without series resistor, simplifying BOM. |
Use Scenario: Clamping transient surges on 12 V CAN bus power line in automotive ECUs. IC Role / Device Role / Timing Role: Fast-acting shunt protector diverting ESD/ISO 7637-2 pulses above 12.35 V to ground. Use Value: 12 V nominal Zener voltage aligns with CAN physical layer supply tolerance; MiniMELF package withstands 30 kV HBM ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C12-TR | Same 12 V nominal Zener, but DO-35 package (larger footprint, higher RthJA = 550 K/W), 100 Ω ZZ, ±5% tolerance | Higher thermal resistance limits power handling in compact layouts; less suitable for high-stability references due to higher ZZ | Select when legacy DO-35 footprint compatibility is required and 12 Ω ZZ is not critical |
| MMSZ4688T1G | SOD-123 package, 12 V nominal, 10 mA IZT, ZZ = 30 Ω, ±5%, 500 mW rating | Surface-mount plastic package offers lower cost but reduced thermal performance (RthJA = 350 K/W) and higher leakage (≤1 μA) | Prefer for cost-sensitive consumer applications where MiniMELF ruggedness and sub-μA leakage are unnecessary |
Compared with BZX55C12-TR and MMSZ4688T1G, TLZ12-GS08 delivers superior voltage stability (12 Ω vs. 100 Ω/30 Ω ZZ), lower leakage (0.04 μA vs. 5 μA/1 μA), and better thermal robustness in MiniMELF - making it optimal for industrial and automotive reference designs demanding long-term accuracy.
Availability
TLZ12-GS08 is available at Aetrix Electronics and suitable for industrial sensor biasing, precision ADC reference generation, and switch-mode power supply feedback requiring stable component supply, tight Zener voltage tolerance, and low-noise regulation.
Supply support for TLZ12-GS08 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 TLZ-Series targets precision voltage reference applications where stability, low noise, and thermal predictability are critical - engineered specifically for analog signal chains, sensor excitation, and feedback control loops.
FAQ
What is the exact Zener voltage range for TLZ12-GS08 at 10 mA test current?
The TLZ12-GS08 has a guaranteed Zener voltage range of 11.13 V to 12.35 V when tested at IZT = 10 mA and Tamb = 25 °C. This 5% tolerance band is specified per Vishay document 85635 Rev. 2.6 and applies to all TLZ12-GS08 units shipped in 8 mm tape on 7" reels. The TLZ12-GS08 maintains this specification across its full operating temperature range.
Does TLZ12-GS08 have a defined temperature coefficient, and how does it affect circuit design?
Yes, the TLZ12-GS08 exhibits a positive temperature coefficient of +6 × 10⁻⁴/K near 25 °C, meaning its Zener voltage increases by approximately 0.072 V per 10 °C rise in junction temperature. This value is confirmed in Figure 3 of the TLZ-Series datasheet (85635). Designers must account for this drift when using TLZ12-GS08 in wide-temperature applications such as automotive engine control units.
What is the maximum reverse leakage current for TLZ12-GS08, and under what conditions is it measured?
The maximum reverse leakage current for TLZ12-GS08 is 0.04 μA, measured at VR = 9.22 V and Tamb = 25 °C. This ultra-low leakage is critical for battery-powered instrumentation and high-impedance sensor interfaces. The TLZ12-GS08 maintains this specification across its storage temperature range of -65 °C to +175 °C, as verified in Vishay's electrical characteristics table.
Can TLZ12-GS08 be used in surface-mount automated assembly, and what is its moisture sensitivity level?
Yes, TLZ12-GS08 is supplied in 8 mm tape on 7" reels (GS08 packaging) and is compatible with standard SMT pick-and-place equipment. It carries MSL level 1 per J-STD-020, meaning it is not moisture-sensitive and requires no dry-pack or baking prior to reflow. Peak reflow temperature is rated at 260 °C, matching IPC/JEDEC J-STD-020 profile G.
How does the MiniMELF (SOD-80) package of TLZ12-GS08 compare thermally to DO-35 or SOD-123 alternatives?
The MiniMELF package of TLZ12-GS08 achieves a junction-to-ambient thermal resistance (RthJA) of 500 K/W on a 50 mm × 50 mm × 1.6 mm PCB - significantly better than DO-35 (550 K/W) and comparable to SOD-123 (350–400 K/W). Its hermetic glass-metal construction also provides superior long-term stability versus plastic SOD-123 packages. This makes TLZ12-GS08 ideal for thermally constrained industrial environments where the TLZ12-GS08 must sustain 500 mW continuously.
TLZ12-GS08 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):
- 12 V
- Tolerance:
- -
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 12 Ohms
- Current - Reverse Leakage @ Vr:
- -
- 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
TLZ12-GS08 FAQ
1.How can I place an order for TLZ12-GS08 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLZ12-GS08 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 TLZ12-GS08 reliable?
The price and inventory of TLZ12-GS08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLZ12-GS08 is usually 5 days.
3.What payment methods are accepted for TLZ12-GS08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLZ12-GS08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLZ12-GS08?
TLZ12-GS08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLZ12-GS08 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 TLZ12-GS08?
For technical support, including TLZ12-GS08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLZ12-GS08 requirements.
6.How does Aetrix verify that TLZ12-GS08 is sourced from the original manufacturer or authorized distributors?
All TLZ12-GS08 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 TLZ12-GS08 meets industry standards.
7.What is the process for return or replacement of TLZ12-GS08?
All TLZ12-GS08 units undergo pre-shipment inspection (PSI). If there is an issue with TLZ12-GS08, 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 TLZ12-GS08 part is unused and in its original packaging.
Return procedure for TLZ12-GS08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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