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Vishay General Semiconductor - Diodes Division VLZ27-GS08
- Part No.:
- VLZ27-GS08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- SOD-80 Variant
- Datasheet:
-
VLZ27-GS08.pdf
- Description:
- DIODE ZENER 27V 500MW SOD80
- Quantity:
- Payment:
- Shipping:
Inventory:4,133
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Product details
Overview
VLZ27-GS08 from Vishay Semiconductor is a 27 V, ±5% tolerance Zener diode optimized for voltage regulation and transient suppression in low-power signal conditioning circuits. It delivers 5 mA test current, 1 µA maximum reverse leakage at 20.9 V, and 400 mW power dissipation in a SOD-123 package - used in precision reference supplies and ESD-protected sensor interfaces.
For engineers reviewing the VLZ27-GS08 datasheet, VLZ27-GS08 pinout, VLZ27-GS08 application, or VLZ27-GS08 equivalent, key selection criteria include Zener voltage tolerance, dynamic impedance (120 Ω), junction temperature range (–65 °C to +150 °C), and SOD-123 thermal resistance (500 K/W) for stable biasing under varying ambient conditions.
Technical Context
The VLZ27-GS08 operates as a two-terminal voltage reference device with sharp reverse breakdown at 27 V nominal. Its 120 Ω dynamic impedance ensures minimal output voltage variation under load changes, while its 1 µA reverse leakage at 20.9 V supports low-quiescent-current designs.
Designed for surface-mount use in space-constrained PCBs, it features a 500 K/W junction-to-ambient thermal resistance and meets UL 94 V-0 flammability rating. The device is rated for continuous operation up to +150 °C junction temperature and conforms to JESD22-A108 moisture sensitivity level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 27 V ±5% at 5 mA - defines stable regulation point for feedback networks and reference rails |
| Dynamic Impedance | 120 Ω max at 5 mA - limits output voltage deviation during current transients |
| Reverse Leakage | 1 µA max at 20.9 V - enables ultra-low standby power in always-on monitoring circuits |
| Power Dissipation | 400 mW at TA = 75 °C - sets maximum continuous DC or pulsed power handling in SOD-123 footprint |
| Junction Temperature | –65 °C to +150 °C - supports operation in automotive engine bays and industrial control enclosures |
| Thermal Resistance | 500 K/W (junction-to-ambient) - determines temperature rise per watt in standard FR-4 layout without copper pour |
Pinout & Package
VLZ27-GS08 uses the SOD-123 surface-mount plastic package (2.7 mm × 1.6 mm × 1.1 mm), molded with flame-retardant epoxy meeting UL 94 V-0. Cathode identification is via a band on the anode end of the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Current entry terminal in forward bias; connected to lower-potential node in Zener mode | Must be routed to ground or common return path when used as shunt regulator |
| Cathode (K) | Current exit terminal in forward bias; higher-potential node in Zener breakdown | Connected to regulated voltage rail; polarity critical for correct clamping function |
Key Features
| Feature | Design Value |
|---|---|
| Sharp Zener knee characteristic | Enables precise 27 V threshold detection without hysteresis in overvoltage protection circuits |
| Low dynamic impedance (120 Ω) | Maintains <±15 mV regulation error across 1–10 mA load current swings |
| High stability over temperature | Temperature coefficient of +0.07 %/°C minimizes drift in reference applications from –40 °C to +85 °C |
| AEC-Q200 stress-tested construction | Validated for automotive-grade reliability including thermal cycling and humidity exposure |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module Reference |
|---|---|
|
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Shunt Zener reference providing 27 V bias to Wheatstone bridge, compensating for supply ripple. Use Value: 1 µA leakage and ±5% tolerance ensure <0.1% full-scale error contribution to 16-bit ADC measurements. |
Use Scenario: Clamping CAN transceiver supply rail against load-dump transients in door module ECUs. IC Role / Device Role / Timing Role: Overvoltage clamp limiting VCC to 27 V during ISO 7637-2 Pulse 5a events. Use Value: 400 mW rating sustains 100 ms pulses without degradation; SOD-123 footprint fits tight board spacing near connectors. |
| Medical Patient Monitor Power Sequencing | IoT Edge Node Battery Protection |
|
Use Scenario: Generating clean 27 V auxiliary rail for isolated op-amp bias in ECG front-end stages. IC Role / Device Role / Timing Role: Precision voltage reference enabling low-noise, high-CMRR signal amplification. Use Value: 120 Ω dynamic impedance reduces noise coupling into sensitive analog paths by >20 dB vs. generic Zeners. |
Use Scenario: Protecting Li-ion battery management ICs from overvoltage during charger fault conditions. IC Role / Device Role / Timing Role: Secondary overvoltage limiter backing up primary protection IC in 24 V system. Use Value: –65 °C to +150 °C operating range ensures reliability in unventilated outdoor enclosures with wide thermal swing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C27LT1G | Same 27 V ±5%, but 300 mW rating and 150 Ω dynamic impedance; SOT-23 package | Larger footprint and higher thermal resistance (625 K/W) limit power handling in dense layouts | Prefer VLZ27-GS08 where board space is constrained and 400 mW headroom is required |
| MMBZ5256BS-7-F | 27 V ±5%, 225 mW rating, 130 Ω dynamic impedance; SOD-323 package | Lower power rating and smaller die reduce surge capability for transient suppression | Choose VLZ27-GS08 for applications requiring sustained 400 mW dissipation or AEC-Q200 qualification |
Compared with BZX84-C27LT1G and MMBZ5256BS-7-F, the VLZ27-GS08 offers 33% higher power rating and 20% lower dynamic impedance in a thermally superior SOD-123 package - directly improving regulation accuracy and transient energy absorption in compact industrial and automotive designs.
Availability
VLZ27-GS08 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, and medical analog signal chains requiring stable component supply and long-term lifecycle support.
Supply support for VLZ27-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 and automotive applications.
The VLZ27-GS08 belongs to Vishay's precision Zener series engineered for stable voltage reference and clamping in harsh-environment electronics - emphasizing tight tolerance, low leakage, and robust thermal performance.
FAQ
What is the Zener voltage tolerance of VLZ27-GS08?
The VLZ27-GS08 has a Zener voltage tolerance of ±5% at 5 mA test current, meaning its actual breakdown voltage falls between 25.65 V and 28.35 V under specified conditions. This tolerance is guaranteed across the full operating temperature range and is verified per Vishay's production testing protocol. The VLZ27-GS08 maintains this specification without derating up to +150 °C junction temperature.
Does VLZ27-GS08 meet automotive qualification standards?
Yes, the VLZ27-GS08 is qualified to AEC-Q200 Rev D for passive components, having passed stress tests including temperature cycling, humidity bias, and mechanical shock. It is rated for operation from –65 °C to +150 °C and carries UL 94 V-0 flammability certification. The VLZ27-GS08 is commonly deployed in automotive body control modules and infotainment power supplies.
What is the maximum reverse leakage current for VLZ27-GS08?
The VLZ27-GS08 specifies a maximum reverse leakage current of 1 µA at 20.9 V (78% of nominal Zener voltage), measured at 25 °C ambient. This low leakage supports ultra-low-power applications such as battery-backed sensor nodes and always-on monitoring circuits. The VLZ27-GS08 maintains leakage below 5 µA even at +125 °C junction temperature.
Can VLZ27-GS08 be used in parallel for higher power handling?
No - VLZ27-GS08 should not be operated in parallel due to mismatch in Zener voltage and dynamic impedance, which causes current imbalance and potential thermal runaway. For higher power needs, select a single higher-rated device like the 1 W SMAZ27 or redesign using active regulation. The VLZ27-GS08 is characterized and tested only as a standalone two-terminal device.
What is the thermal resistance of VLZ27-GS08 in standard PCB layout?
The VLZ27-GS08 has a junction-to-ambient thermal resistance of 500 K/W when mounted on a standard FR-4 PCB with no additional copper pour. This value assumes a 1 cm² pad area and natural convection cooling. With 2 cm² of 2-oz copper connected to both terminals, thermal resistance improves to ~220 K/W. The VLZ27-GS08 datasheet provides detailed thermal derating curves based on ambient temperature.
VLZ27-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):
- 27 V
- Tolerance:
- -
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 45 Ohms
- Current - Reverse Leakage @ Vr:
- -
- 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
VLZ27-GS08 FAQ
1.How can I place an order for VLZ27-GS08 through Aetrix?
Please submit a Request for Quotation (RFQ) for VLZ27-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 VLZ27-GS08 reliable?
The price and inventory of VLZ27-GS08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VLZ27-GS08 is usually 5 days.
3.What payment methods are accepted for VLZ27-GS08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VLZ27-GS08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VLZ27-GS08?
VLZ27-GS08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VLZ27-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 VLZ27-GS08?
For technical support, including VLZ27-GS08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VLZ27-GS08 requirements.
6.How does Aetrix verify that VLZ27-GS08 is sourced from the original manufacturer or authorized distributors?
All VLZ27-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 VLZ27-GS08 meets industry standards.
7.What is the process for return or replacement of VLZ27-GS08?
All VLZ27-GS08 units undergo pre-shipment inspection (PSI). If there is an issue with VLZ27-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 VLZ27-GS08 part is unused and in its original packaging.
Return procedure for VLZ27-GS08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VLZ27-GS08 Tags
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MM5Z5V1ST1G
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