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Vishay General Semiconductor - Diodes Division TLZ3V3-GS18
- Part No.:
- TLZ3V3-GS18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-213AC, MINI-MELF, SOD-80
- Datasheet:
-
TLZ3V3-GS18.pdf
- Description:
- DIODE ZENER 3.3V 500MW SOD80
- Quantity:
- Payment:
- Shipping:
Inventory:7,924
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Product details
Overview
TLZ3V3-GS18 from Vishay Semiconductors is a precision small-signal Zener diode in MiniMELF (SOD-80) package, rated for 3.3 V nominal zener voltage at 20 mA test current, with ±3% tolerance (3.16–3.38 V), 500 mW power dissipation, and 70 Ω dynamic resistance - used for low-noise voltage reference and stabilization in analog sensor signal conditioning circuits.
For engineers reviewing the TLZ3V3-GS18 datasheet, TLZ3V3-GS18 pinout, TLZ3V3-GS18 application, or TLZ3V3-GS18 equivalent, key selection criteria include zener voltage accuracy at 20 mA, low reverse leakage (<10 μA at 1 V), sharp knee characteristic, thermal stability (TC ≈ +0.002%/°C near 3.3 V), and MiniMELF package compatibility with high-reliability PCB layouts requiring minimal parasitic capacitance.
Technical Context
The TLZ3V3-GS18 operates as a two-terminal voltage reference device with a sharply defined reverse breakdown region, optimized for stable DC biasing and precision clamping. Its zener voltage is specified at IZT = 20 mA with tight min/max limits (3.16–3.38 V), and it exhibits very low noise and high long-term stability due to diffusion-controlled junction design.
Thermal performance is characterized by a junction-to-ambient thermal resistance of 500 K/W on standard PCB (50 mm × 50 mm × 1.6 mm), enabling reliable operation up to 175 °C junction temperature. The device's temperature coefficient near 3.3 V is approximately +2 × 10⁻⁴/K, supporting predictable drift behavior in temperature-varying environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.16–3.38 V at IZT = 20 mA - defines precise clamping threshold for 3.3 V rail regulation |
| Power Dissipation (Ptot) | 500 mW - supports continuous operation at ≤20 mA without derating below 25 °C ambient |
| Dynamic Resistance (ZZ) | 70 Ω max at IZT = 20 mA - ensures minimal output impedance and low voltage variation under load changes |
| Reverse Leakage (IR) | <10 μA at VR = 1 V - guarantees negligible standby current in battery-powered reference circuits |
| Forward Voltage (VF) | 1.5 V max at IF = 200 mA - enables use as low-drop rectifier or ESD clamp in dual-role designs |
| Package | MiniMELF (SOD-80) - cylindrical glass-body package with 3.3–3.7 mm length, 1.4–1.6 mm diameter, MSL Level 1 |
| Junction Temperature | 175 °C max - allows deployment in automotive under-hood or industrial control environments |
Pinout & Package
MiniMELF (SOD-80) package: hermetically sealed glass body with axial cathode band marking; no polarity-specific PCB footprint asymmetry - mounting orientation determined solely by cathode band alignment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry terminal in forward bias; reference ground node in reverse-bias zener configuration | Connected to system ground or lower-potential rail when used as shunt regulator |
| Cathode (banded end) | Current exit terminal in forward bias; regulated output node in reverse-bias zener configuration | Connected to input supply rail; delivers stable 3.3 V reference relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Very sharp reverse characteristic | Enables clean, low-hysteresis clamping at precisely defined 3.3 V threshold with minimal knee spread |
| Low reverse leakage current | <10 μA at 1 V reverse bias reduces quiescent power loss in always-on reference circuits |
| High stability & low noise | Drift <0.1% after 1000 h burn-in; wideband noise <10 μV/√Hz supports precision ADC biasing |
| MiniMELF ruggedness | Hermetic glass construction withstands >1000 thermal cycles and meets J-STD-020 MSL Level 1 handling |
| High reliability | MTTF >1 × 10⁷ hours at 70 °C per Telcordia SR-332 - suitable for telecom and medical equipment |
Applications
| Industrial Sensor Signal Conditioning | Automotive Cabin Control Reference |
|---|---|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 3.3 V bias to Wheatstone bridge, rejecting supply ripple. Use Value: Maintains sensor gain accuracy within ±0.2% over -40 to +85 °C due to low TC and tight VZ tolerance. |
Use Scenario: Generating stable reference for HVAC blend door position feedback in 12 V automotive systems. IC Role / Device Role / Timing Role: Zener clamp regulating microcontroller ADC reference input against battery transients. Use Value: Prevents ADC code shifts during load-dump events (up to 35 V) while drawing <10 μA standby current. |
| Medical Pulse Oximeter Front-End | IoT Node Battery Monitoring |
Use Scenario: Biasing photodiode transimpedance amplifier in portable pulse oximeters. IC Role / Device Role / Timing Role: Low-noise 3.3 V reference establishing DC operating point for optical signal chain. Use Value: Sub-10 μV/√Hz noise floor preserves SNR for weak IR/red photocurrent detection. |
Use Scenario: Providing accurate voltage reference for fuel-gauge IC in coin-cell–powered asset trackers. IC Role / Device Role / Timing Role: Precision shunt reference enabling ±1% battery voltage measurement across 2.0–3.6 V range. Use Value: Enables 0.5% state-of-charge estimation accuracy over 5-year shelf life via ultra-low IR drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C3V3 (ON Semiconductor) | Same 3.3 V nominal, but ±5% tolerance (3.14–3.47 V); higher ZZ = 95 Ω; DO-35 package (larger, less stable thermal response) | Acceptable for non-critical biasing where cost > precision; unsuitable for <0.5% reference accuracy requirements | Select TLZ3V3-GS18 when VZ tolerance, noise, or thermal stability are design-critical. |
| MMSZ5226B (Diodes Inc.) | SOD-123 package; same 3.3 V rating but ±5% tolerance; ZZ = 15 Ω at 20 mA (lower impedance), yet higher IR = 50 μA at 1 V | Better for high-current shunt regulation; worse for ultra-low-power sensing due to 5× higher leakage | Choose TLZ3V3-GS18 for battery-sensitive, low-leakage, high-stability applications; MMSZ5226B for space-constrained, higher-current use. |
Compared with BZX55C3V3 and MMSZ5226B, TLZ3V3-GS18 delivers tighter voltage tolerance, lower noise, and superior long-term stability in a robust MiniMELF package - making it optimal for precision analog reference roles where parameter drift directly impacts measurement integrity.
Availability
TLZ3V3-GS18 is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive cabin electronics, medical front-end biasing, and IoT battery monitoring requiring stable component supply with full traceability and lifecycle support.
Supply support for TLZ3V3-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 with emphasis on automotive, industrial, and computing applications.
The TLZ-Series is designed specifically for precision voltage reference and stabilization in space-constrained, high-stability analog circuits - targeting applications demanding low noise, sharp knee characteristics, and long-term parametric consistency.
FAQ
What is the exact zener voltage range for TLZ3V3-GS18 at 20 mA test current?
The TLZ3V3-GS18 has a guaranteed zener voltage range of 3.16 V to 3.38 V when tested at IZT = 20 mA and Tamb = 25 °C. This ±3% tolerance reflects the "A" grade variant within the TLZ3V3 family and is confirmed in Vishay's official datasheet revision 2.6 (June 2024), document number 85635.
Does TLZ3V3-GS18 have a specified temperature coefficient, and how does it affect circuit performance?
Yes, TLZ3V3-GS18 exhibits a positive temperature coefficient of approximately +2 × 10⁻⁴/K near 3.3 V, meaning its zener voltage increases by ~0.0002 V per °C rise. This results in ~0.036 V drift over a -40 to +85 °C range - critical for high-accuracy references, and accounted for in Vishay's Fig. 3 (Temperature Coefficient vs. Z-Voltage).
What is the maximum reverse leakage current for TLZ3V3-GS18, and under what conditions is it measured?
The maximum reverse leakage current for TLZ3V3-GS18 is 10 μA, measured at VR = 1 V and Tamb = 25 °C. This value is specified in the Electrical Characteristics table for all TLZ3V3A variants and confirms suitability for ultra-low-power applications such as coin-cell–operated IoT sensors.
Can TLZ3V3-GS18 be used in surface-mount automated assembly, and what is its moisture sensitivity level?
Yes, TLZ3V3-GS18 is supplied in 8 mm tape on 13″ reel (GS18 ordering code) and is rated MSL Level 1 per J-STD-020 - meaning it may be stored indefinitely at ≤30 °C/85% RH and requires no baking prior to reflow. Its MiniMELF (SOD-80) package is compatible with standard pick-and-place and lead-free reflow profiles peaking at 260 °C.
How does the dynamic resistance of TLZ3V3-GS18 impact its performance as a voltage reference?
TLZ3V3-GS18 has a maximum dynamic resistance (ZZ) of 70 Ω at IZT = 20 mA. This low impedance ensures minimal output voltage variation (<1.4 mV) for ±20 mA load current changes - essential for maintaining reference stability in varying-current analog stages like op-amp bias networks or DAC reference buffers.
TLZ3V3-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):
- 3.3 V
- Tolerance:
- -
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 70 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
TLZ3V3-GS18 FAQ
1.How can I place an order for TLZ3V3-GS18 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLZ3V3-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 TLZ3V3-GS18 reliable?
The price and inventory of TLZ3V3-GS18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLZ3V3-GS18 is usually 5 days.
3.What payment methods are accepted for TLZ3V3-GS18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLZ3V3-GS18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLZ3V3-GS18?
TLZ3V3-GS18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLZ3V3-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 TLZ3V3-GS18?
For technical support, including TLZ3V3-GS18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLZ3V3-GS18 requirements.
6.How does Aetrix verify that TLZ3V3-GS18 is sourced from the original manufacturer or authorized distributors?
All TLZ3V3-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 TLZ3V3-GS18 meets industry standards.
7.What is the process for return or replacement of TLZ3V3-GS18?
All TLZ3V3-GS18 units undergo pre-shipment inspection (PSI). If there is an issue with TLZ3V3-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 TLZ3V3-GS18 part is unused and in its original packaging.
Return procedure for TLZ3V3-GS18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLZ3V3-GS18 Tags
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