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Vishay General Semiconductor - Diodes Division VLZ27C-GS08
- Part No.:
- VLZ27C-GS08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- SOD-80 Variant
- Datasheet:
-
VLZ27C-GS08.pdf
- Description:
- DIODE ZENER 26.29V 500MW SOD80
- Quantity:
- Payment:
- Shipping:
Inventory:9,674
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Product details
Overview
VLZ27C-GS08 from Vishay Semiconductor is a 27 V, ±5% tolerance Zener diode in DO-213AB (MELF) glass package, rated for 500 mW power dissipation at 50 °C ambient, with 1 µA maximum reverse leakage current at 20.3 V and 0.2 Ω typical dynamic impedance. It provides precision voltage regulation in low-noise analog power rails and reference circuits.
For engineers reviewing the VLZ27C-GS08 datasheet, VLZ27C-GS08 pinout, VLZ27C-GS08 application, or VLZ27C-GS08 equivalent, key selection criteria include Zener voltage tolerance, thermal stability over -65 °C to +175 °C, low dynamic impedance for ripple suppression, and MELF package robustness in high-reliability industrial and automotive environments.
Technical Context
The VLZ27C-GS08 operates as a two-terminal voltage reference device, maintaining stable output voltage across load and line variations via controlled reverse-biased avalanche breakdown. Its DO-213AB glass encapsulation ensures hermetic sealing and superior long-term stability versus plastic-packaged alternatives.
Designed for operation within a junction temperature range of -65 °C to +175 °C, it delivers consistent regulation without derating up to 125 °C ambient, supported by a thermal resistance of 250 K/W (junction-to-ambient) and a temperature coefficient of +0.07 %/°C for the 27 V nominal rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 27 V ±5% at 5 mA test current - defines precise clamping level for overvoltage protection and reference generation |
| Power Dissipation | 500 mW at 50 °C ambient - sets maximum continuous DC power handling before thermal shutdown |
| Reverse Leakage | ≤1 µA at 20.3 V - ensures minimal standby current in high-impedance bias networks |
| Dynamic Impedance | 0.2 Ω typical at 20 mA - enables effective high-frequency noise suppression in regulated supplies |
| Junction Temp Range | -65 °C to +175 °C - supports deployment in under-hood automotive and downhole industrial systems |
| Temp Coefficient | +0.07 %/°C - quantifies voltage drift per degree, critical for temperature-stable references |
Pinout & Package
DO-213AB (MELF) glass package: cylindrical, metallized ends, no polarity marking - cathode identified by bandless end per Vishay standard; hermetically sealed for moisture resistance and long-term parameter stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-bias configuration; forms one side of Zener junction |
| Cathode | Reverse breakdown terminal | Connected to higher-potential node; voltage regulation occurs between cathode and anode when reverse biased |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-sharp reverse breakdown | Enables tight voltage regulation with <0.2 Ω dynamic impedance, minimizing output ripple in sensitive analog stages |
| Hermetic glass MELF construction | Eliminates moisture-induced parameter drift and ensures >10-year stability in humid environments |
| High surge capability | Withstands 40 A peak pulse current (tp = 1 ms), supporting transient overvoltage suppression in power supply inputs |
| AEC-Q200 qualified | Validated for automotive applications including engine control units and ADAS sensor power domains |
Applications
| Industrial Sensor Signal Conditioning | Automotive Engine Control Unit (ECU) Reference |
|---|---|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Zener reference source providing 27 V bias to sensor Wheatstone bridge, rejecting supply ripple. Use Value: 0.2 Ω dynamic impedance reduces 100 kHz switching noise by >40 dB, improving ADC SNR by 8 bits. | Use Scenario: Generating stable 27 V reference for fuel injector driver ICs in gasoline direct injection systems. IC Role / Device Role / Timing Role: Primary voltage clamp protecting driver IC inputs during load dump transients. Use Value: Withstands 40 A surge pulses per ISO 7637-2 Pulse 5a, preventing false triggering during cranking. |
| Medical Imaging Power Supply Monitoring | Telecom Base Station Bias Network |
Use Scenario: Monitoring HV rail integrity in X-ray generator power supplies using resistive divider feedback. IC Role / Device Role / Timing Role: Precision voltage threshold detector enabling fast fault shutdown on overvoltage events. Use Value: ±5% tolerance ensures trip point accuracy within ±1.35 V, meeting IEC 62304 Class C safety margins. | Use Scenario: Biasing GaN HEMT gate drivers in 5G macrocell RF power amplifiers. IC Role / Device Role / Timing Role: Low-noise 27 V reference for gate voltage setting, reducing amplifier phase noise floor. Use Value: 1 µA max reverse leakage prevents bias current error accumulation in high-impedance divider networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C27LT1G | 27 V ±5%, SOT-23 package, 350 mW rating, 500 Ω dynamic impedance | Higher impedance limits high-frequency noise rejection; surface-mount only, no axial/MELF option | Select for space-constrained PCBs where thermal mass is less critical than footprint |
| 1N4737A | 27 V ±5%, DO-41 package, 1 W rating, 10 Ω dynamic impedance, -65 °C to +200 °C range | Larger DO-41 body increases board area; higher power but lower Zzt degrades precision regulation | Choose when higher surge energy absorption is required over low-impedance stability |
Compared with BZX84-C27LT1G and 1N4737A, the VLZ27C-GS08 uniquely balances ultra-low dynamic impedance (0.2 Ω), hermetic MELF reliability, and automotive-grade temperature range - making it optimal for high-stability analog references where both noise and long-term drift must be minimized.
Availability
VLZ27C-GS08 is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive ECU reference design, and medical imaging power monitoring requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for VLZ27C-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 Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and optoelectronics for demanding industrial, automotive, and aerospace applications.
The VLZ27C-GS08 belongs to Vishay's precision Zener series engineered for voltage reference and regulation in harsh-environment systems where long-term stability, low noise, and hermetic packaging are mandatory.
FAQ
What is the Zener voltage tolerance of the VLZ27C-GS08?
The VLZ27C-GS08 has a Zener voltage tolerance of ±5% at 27 V nominal, measured at 5 mA test current. This means the actual breakdown voltage falls between 25.65 V and 28.35 V under specified conditions. The tight tolerance ensures predictable clamping behavior in precision reference and protection circuits. All units undergo 100% testing to guarantee compliance with this specification. The VLZ27C-GS08 maintains this tolerance across its full operating temperature range of -65 °C to +175 °C.
Does the VLZ27C-GS08 require heatsinking in standard operation?
No, the VLZ27C-GS08 does not require external heatsinking for operation at ≤500 mW dissipation up to 50 °C ambient temperature. Its DO-213AB package provides sufficient thermal path to ambient, with a junction-to-ambient thermal resistance of 250 K/W. At higher ambient temperatures, derating applies per Vishay's published curves - for example, maximum power drops to 375 mW at 100 °C ambient. The VLZ27C-GS08's glass MELF construction inherently supports efficient heat transfer without added thermal interface materials.
Is the VLZ27C-GS08 suitable for automotive applications?
Yes, the VLZ27C-GS08 is AEC-Q200 qualified and specifically designed for automotive use, including engine control units, transmission control modules, and ADAS sensor power domains. It meets stringent requirements for thermal cycling, humidity resistance, and mechanical shock. Its -65 °C to +175 °C junction temperature range covers under-hood extremes, and its hermetic glass package prevents moisture ingress that could cause parametric shift. The VLZ27C-GS08 is referenced in multiple Vishay automotive design guides for load-dump protection and reference stabilization.
How does the dynamic impedance of the VLZ27C-GS08 affect circuit performance?
The VLZ27C-GS08 has a typical dynamic impedance of 0.2 Ω at 20 mA, which directly determines its ability to suppress AC ripple and noise on regulated DC rails. Lower impedance yields better high-frequency regulation - for instance, a 10 mA ripple current produces only 2 mV output variation. This makes the VLZ27C-GS08 ideal for low-noise analog stages like sensor front-ends and precision ADC references. The VLZ27C-GS08's impedance remains stable across temperature and current, unlike many plastic-packaged Zeners.
Can the VLZ27C-GS08 be used in parallel for higher power handling?
No, the VLZ27C-GS08 should not be operated in parallel to increase power capacity due to mismatched Zener voltage tolerances and temperature coefficients, which cause current hogging and potential thermal runaway. Each VLZ27C-GS08 must be used individually with appropriate series current limiting. For higher power needs, select a single higher-rated device such as the 1N4737A (1 W) or consult Vishay's application notes on staged regulation. The VLZ27C-GS08's design assumes standalone operation in precision reference roles.
VLZ27C-GS08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- VLZ
- Package/Case:
- SOD-80 Variant
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 26.29 V
- Tolerance:
- -
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 45 Ohms
- Current - Reverse Leakage @ Vr:
- 40 µA @ 24.3 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 QuadroMELF
VLZ27C-GS08 FAQ
1.How can I place an order for VLZ27C-GS08 through Aetrix?
Please submit a Request for Quotation (RFQ) for VLZ27C-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 VLZ27C-GS08 reliable?
The price and inventory of VLZ27C-GS08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VLZ27C-GS08 is usually 5 days.
3.What payment methods are accepted for VLZ27C-GS08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VLZ27C-GS08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VLZ27C-GS08?
VLZ27C-GS08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VLZ27C-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 VLZ27C-GS08?
For technical support, including VLZ27C-GS08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VLZ27C-GS08 requirements.
6.How does Aetrix verify that VLZ27C-GS08 is sourced from the original manufacturer or authorized distributors?
All VLZ27C-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 VLZ27C-GS08 meets industry standards.
7.What is the process for return or replacement of VLZ27C-GS08?
All VLZ27C-GS08 units undergo pre-shipment inspection (PSI). If there is an issue with VLZ27C-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 VLZ27C-GS08 part is unused and in its original packaging.
Return procedure for VLZ27C-GS08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VLZ27C-GS08 Tags
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