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Vishay BZD27B91P-HE3_A08
- Part No.:
- BZD27B91P-HE3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
BZD27B91P-HE3_A08.pdf
- Description:
- ZENER DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,695
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Product details
Overview
BZD27B91P-HE3_A08 from Vishay Semiconductors is a surface-mount, AEC-Q101 qualified Zener diode with nominal breakdown voltage of 91 V, ±2 % tolerance, 5 mA test current, and 150 W peak surge power rating (10/1000 μs). It operates from −65 °C to +175 °C and is used for overvoltage protection in automotive power supply rails and industrial DC bus monitoring.
For engineers reviewing the BZD27B91P-HE3_A08 datasheet, BZD27B91P-HE3_A08 pinout, BZD27B91P-HE3_A08 application, or BZD27B91P-HE3_A08 equivalent, key selection criteria include its 91 V Zener voltage, 122 V clamping voltage at 75 A, 0.09 %/°C temperature coefficient, DO-219AB (SMF) package, and AEC-Q101 qualification for automotive reliability.
Technical Context
This unidirectional Zener diode functions as a precision voltage reference and transient voltage suppressor. Its 91 V nominal Zener voltage is specified at 5 mA test current, with dynamic resistance of 60 Ω and clamping voltage of 122 V under 75 A 10/1000 μs surge conditions.
Designed for high-reliability automotive applications, it meets JESD201 Class 2 whisker testing, MSL Level 1 per J-STD-020 (260 °C peak reflow), and ESD ratings >8 kV HBM / >800 V MM. Its thermal resistance is 30 K/W junction-to-lead and 180 K/W junction-to-ambient on 3 mm × 3 mm Cu pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 89.18 V min. to 92.82 V max. at 5 mA - ensures stable 91 V regulation within ±2 % tolerance |
| Clamping Voltage (VC) | 122 V at IRSM = 75 A (10/1000 μs) - defines maximum voltage seen by protected circuit during surge |
| Peak Surge Power (PRSM) | 150 W - supports robust transient suppression in 12 V/24 V/48 V automotive systems |
| Temperature Coefficient (αVZ) | +0.09 %/°C max. - enables predictable voltage drift across −65 °C to +175 °C operating range |
| Junction-to-Lead Thermal Resistance | 30 K/W - allows efficient heat transfer to PCB copper pad for sustained power handling |
| Package | DO-219AB (SMF) - low-profile 2.7 × 3.9 mm SMD footprint compatible with automated assembly |
| AEC-Q101 Qualified | Yes - validated for automotive under-hood and powertrain applications requiring zero-defect reliability |
Pinout & Package
DO-219AB (SMF) package: 2.7 mm × 3.9 mm body, 0.85 mm height, cathode marked by band on top surface. Mounting requires 1.3 mm × 1.3 mm solder pad with 1.4 mm center-to-center spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to lower-potential node in Zener operation | Must be routed to system ground or return path; determines polarity of clamping action |
| Cathode | Current exit point in forward bias; connected to higher-potential node in Zener operation | Marked by band; connects to protected line (e.g., battery rail); carries full surge current during clamping |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables precise voltage threshold setting without post-production trimming in safety-critical circuits |
| 150 W peak surge power (10/1000 μs) | Withstands ISO 7637-2 Pulse 1/2a/3a transients in 12 V automotive networks without failure |
| MSL Level 1 moisture sensitivity | Eliminates bake-out requirement before reflow, reducing manufacturing cost and cycle time |
| Low dynamic resistance (60 Ω) | Minimizes voltage overshoot during fast-rising transients, improving protection margin for downstream ICs |
| −65 °C to +175 °C operating range | Supports placement near power converters, motors, or engine compartments without derating |
Applications
| Automotive Battery Rail Protection | Industrial DC Bus Monitoring |
|---|---|
Use Scenario: Protecting 12 V/24 V vehicle battery lines against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional Zener clamp placed between battery rail and ground. Use Value: Limits voltage to ≤122 V during 75 A surges, preventing damage to MCU power supplies and CAN transceivers. | Use Scenario: Guarding PLC analog input modules against field-wiring induced transients on 24–48 V DC buses. IC Role / Device Role / Timing Role: Standoff protector mounted at connector entry point. Use Value: Absorbs 150 W surges without degradation, maintaining signal integrity for 16-bit ADC references. |
| Telecom Power Supply Clamp | Renewable Energy Inverter Gate Drive Protection |
Use Scenario: Safeguarding PoE-powered equipment front-end regulators from Ethernet cable ESD events. IC Role / Device Role / Timing Role: Secondary clamp after primary TVS, fine-tuning voltage threshold. Use Value: Tight 91 V tolerance ensures coordination with upstream 100 V TVS, avoiding premature conduction. | Use Scenario: Shielding IGBT gate drivers in solar inverters from Miller-induced spikes during switching. IC Role / Device Role / Timing Role: Zener reference tied between gate and emitter to clamp VGE. Use Value: 0.09 %/°C TC maintains <±0.5 V error over −40 °C to +125 °C junction temp, ensuring safe gate drive. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ91A | Higher clamping voltage (126 V vs. 122 V), same 150 W PRSM, but ±5 % VZ tolerance | Less precise voltage threshold; suitable where 91 V accuracy is non-critical | Select when cost priority outweighs tight regulation need and AEC-Q101 is not required |
| P6SMB91A-13-F | Same DO-214AA package, 126 V clamping, ±5 % VZ, no AEC-Q101 qualification | Limited to commercial/industrial use; not validated for automotive temperature cycling or whisker resistance | Choose for non-automotive designs needing legacy SMB footprint compatibility |
Compared with SMBJ91A and P6SMB91A-13-F, BZD27B91P-HE3_A08 offers tighter ±2 % voltage tolerance, lower clamping voltage, and AEC-Q101 qualification-making it the only option suitable for automotive-grade 91 V Zener reference and surge suppression where precision and reliability are mandatory.
Availability
BZD27B91P-HE3_A08 is available at Aetrix Electronics and suitable for automotive battery protection, industrial DC bus monitoring, telecom power clamping, and renewable energy inverter gate drive protection requiring stable component supply and long-term lifecycle support.
Supply support for BZD27B91P-HE3_A08 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 automotive, industrial, and computing markets.
The BZD27B Series belongs to Vishay's AEC-Q101 qualified Zener portfolio, engineered specifically for precision voltage regulation and transient suppression in harsh-environment automotive power systems.
FAQ
What is the Zener voltage tolerance of BZD27B91P-HE3_A08?
BZD27B91P-HE3_A08 has a Zener voltage tolerance of ±2 %, with a specified range of 89.18 V to 92.82 V at 5 mA test current. This tight tolerance ensures consistent voltage clamping performance across production lots and temperature extremes, critical for automotive safety systems where regulatory compliance depends on predictable threshold behavior. The BZD27B91P-HE3_A08 achieves this via process-controlled silicon planar junction technology.
Is BZD27B91P-HE3_A08 qualified for automotive applications?
Yes, BZD27B91P-HE3_A08 is AEC-Q101 qualified, meaning it has passed stress tests for temperature cycling, humidity, mechanical shock, and whisker growth per JESD201 Class 2. It also meets MSL Level 1 for reflow compatibility and exceeds 8 kV HBM ESD immunity-key requirements for under-hood and powertrain applications. The "HE3" suffix explicitly denotes AEC-Q101 qualification, distinguishing it from commercial-grade "E3" variants. BZD27B91P-HE3_A08 is therefore approved for use in automotive ECUs, battery management systems, and ADAS power domains.
What is the clamping voltage of BZD27B91P-HE3_A08 under surge conditions?
The clamping voltage of BZD27B91P-HE3_A08 is 122 V at a peak reverse surge current (IRSM) of 75 A with a 10/1000 μs waveform. This value is measured per IEC 60-1 and defines the maximum voltage imposed on the protected circuit during standardized automotive transients like ISO 7637-2 Pulse 5a (load dump). The low clamping ratio (122 V / 91 V ≈ 1.34) reflects its optimized junction design, enabling effective protection of 100 V-rated downstream components. BZD27B91P-HE3_A08 maintains this clamping performance across its full operating temperature range.
Which package does BZD27B91P-HE3_A08 use, and what are its dimensions?
BZD27B91P-HE3_A08 uses the DO-219AB (SMF) surface-mount package: 2.7 mm × 3.9 mm body length, 0.85 mm maximum height, and cathode identified by a band on the top surface. Its footprint requires 1.3 mm × 1.3 mm solder pads with 1.4 mm center-to-center spacing. This low-profile, high-power package provides superior thermal performance (RthJL = 30 K/W) versus legacy SOD-123 variants while remaining compatible with standard 8 mm tape-and-reel automation. BZD27B91P-HE3_A08's SMF package supports wave and reflow soldering up to 260 °C peak temperature.
How does the temperature coefficient affect BZD27B91P-HE3_A08's performance?
The temperature coefficient of BZD27B91P-HE3_A08 is +0.09 %/°C maximum, meaning its Zener voltage increases by no more than 0.082 V per 10 °C rise in junction temperature. This positive, tightly controlled drift ensures predictable voltage reference stability across −65 °C to +175 °C operation-critical for engine control units and battery monitors exposed to wide ambient swings. Unlike older Zeners with higher coefficients, BZD27B91P-HE3_A08 avoids excessive overvoltage at high temperatures or undervoltage at cold starts. Its coefficient is verified per JEDEC JESD22-A104 temperature cycling tests, and BZD27B91P-HE3_A08 data sheets specify it at 5 mA test current.
BZD27B91P-HE3_A08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay
- Package/Case:
- DO-219AB
- Series:
- BZD27B, eSMP®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 75V (Max)
- Voltage - Breakdown (Min):
- 89.18V
- Voltage - Clamping (Max) @ Ipp:
- 122V
- Current - Peak Pulse (10/1000µs):
- 1.2A
- Power - Peak Pulse:
- 150W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
BZD27B91P-HE3_A08 FAQ
1.How can I place an order for BZD27B91P-HE3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27B91P-HE3_A08 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 BZD27B91P-HE3_A08 reliable?
The price and inventory of BZD27B91P-HE3_A08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZD27B91P-HE3_A08 is usually 5 days.
3.What payment methods are accepted for BZD27B91P-HE3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27B91P-HE3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27B91P-HE3_A08?
BZD27B91P-HE3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27B91P-HE3_A08 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 BZD27B91P-HE3_A08?
For technical support, including BZD27B91P-HE3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27B91P-HE3_A08 requirements.
6.How does Aetrix verify that BZD27B91P-HE3_A08 is sourced from the original manufacturer or authorized distributors?
All BZD27B91P-HE3_A08 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 BZD27B91P-HE3_A08 meets industry standards.
7.What is the process for return or replacement of BZD27B91P-HE3_A08?
All BZD27B91P-HE3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with BZD27B91P-HE3_A08, 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 BZD27B91P-HE3_A08 part is unused and in its original packaging.
Return procedure for BZD27B91P-HE3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZD27B91P-HE3_A08 Tags
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