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Vishay BZD27B91P-HE3_A18
- Part No.:
- BZD27B91P-HE3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
BZD27B91P-HE3_A18.pdf
- Description:
- ZENER DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,395
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Product details
Overview
BZD27B91P-HE3_A18 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 122 V clamping voltage at 75 A surge current. It delivers 150 W non-repetitive peak surge power (10/1000 μs) and operates across -65 °C to +175 °C for automotive power rail protection.
For engineers reviewing the BZD27B91P-HE3_A18 datasheet, BZD27B91P-HE3_A18 pinout, BZD27B91P-HE3_A18 application, or BZD27B91P-HE3_A18 equivalent, key selection criteria include its DO-219AB (SMF) package, low dynamic resistance (60 Ω), positive temperature coefficient (+0.09 to +0.13 %/°C), and compliance with JESD201 Class 2 whisker testing and MSL Level 1 reflow requirements.
Technical Context
This unidirectional Zener diode functions as a precision voltage reference and transient voltage suppressor in high-reliability DC power systems. Its design integrates low leakage (<5 μA at VR = 75 V), stable 91 V regulation under 5 mA bias, and robust surge handling per IEC 60-1 (10/1000 μs waveform).
The device uses silicon planar technology in an eSMP® SMF (DO-219AB) package with 1.9 mm × 1.7 mm footprint and 0.85 mm height. Thermal resistance is 30 K/W junction-to-lead and 180 K/W junction-to-ambient on 3 mm × 3 mm Cu pads, enabling operation up to TJ = 175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 89.18 V min. / 91 V nom. / 92.82 V max. - tight ±2 % tolerance ensures stable regulation in feedback loops and reference circuits. |
| Test Current (IZT) | 5 mA - defines operating point for specified VZ; enables low-power biasing in sensor supply rails. |
| Clamping Voltage (VC) | 122 V at IRSM = 75 A - limits transient overvoltage during load dump or inductive switching events. |
| Surge Power (PRSM) | 150 W (10/1000 μs) - sustains automotive ISO 7637-2 pulse 5a without degradation. |
| Dynamic Resistance (ZZ) | 60 Ω max. at IZT = 5 mA - minimizes voltage shift under varying load currents in precision references. |
| Temperature Coefficient (αVZ) | +0.09 to +0.13 %/°C - predictable positive drift supports thermal compensation in wide-temperature designs. |
| Junction Temperature (TJ) | 175 °C max. - enables placement near hot components in engine control units and battery management systems. |
Pinout & Package
Package: DO-219AB (SMF), low-profile surface-mount case with cathode marking on top surface; dimensions 2.9 mm × 1.7 mm × 0.85 mm; compatible with standard SOD-123W footprint layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; grounded node in reverse-biased clamp configuration | Connected to system ground or low-side return path; must handle full surge current during transients. |
| Cathode | Current exit terminal in forward bias; high-voltage input node in Zener regulation/clamp mode | Connected to protected rail (e.g., 12 V or 48 V bus); marked with band on top surface per JEDEC DO-219AB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, ADAS power supplies, and body electronics requiring zero-failure reliability. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking-reduces manufacturing overhead in high-volume SMT lines. |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth in long-life deployments, critical for under-hood modules operating >15 years. |
| 150 W surge rating (10/1000 μs) | Meets ISO 7637-2 Pulse 5a for 12 V systems and Pulse 5b for 48 V architectures without external series impedance. |
| Low leakage current | <5 μA at 75 V reverse bias-minimizes standby power loss in always-on vehicle networks (e.g., CAN FD wake-up circuits). |
Applications
| Automotive Load Dump Protection | Industrial DC Bus Clamping |
|---|---|
Use Scenario: Suppresses 120 V transients induced by alternator load dump in 12 V automotive electrical systems. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed across main battery rail upstream of DC/DC converters. Use Value: Limits peak voltage to 122 V at 75 A, preventing damage to downstream 100 V-rated MOSFETs and controllers without derating. |
Use Scenario: Protects 48 V mild-hybrid power distribution units from inductive kickback during contactor switching. IC Role / Device Role / Timing Role: Standoff Zener clamp absorbing energy from 200 mJ inductive spikes in <100 ns. Use Value: Maintains clamping stability at 175 °C junction temperature, eliminating thermal runaway risk in sealed enclosures. |
| High-Temperature Sensor Reference | Telecom Power Supply Regulation |
Use Scenario: Provides stable 91 V reference for pressure sensor excitation in exhaust gas recirculation (EGR) valves. IC Role / Device Role / Timing Role: Precision Zener voltage source in ratiometric bridge bias circuit with integrated ADC. Use Value: ±2 % VZ tolerance and +0.11 %/°C TC ensure <0.5 % total error over -40 °C to +150 °C operating range. |
Use Scenario: Regulates auxiliary 91 V bias rail for optical transceiver laser drivers in outdoor base stations. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant voltage despite 10–100 mA load variation and 8 kV HBM ESD events. Use Value: >8 kV HBM ESD rating and 180 K/W RthJA enable direct integration without shielding or derating in compact RF modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A-E3/52 (Vishay) | TVS diode, 90 V standoff, 100 W peak power (10/1000 μs), bidirectional | Designed for fast transient suppression only-not for precision regulation due to wider VBR tolerance (±5 %) | Select when primary need is surge immunity rather than stable DC reference; not suitable for feedback loops. |
| P6SMB91A (ON Semiconductor) | 600 W peak power TVS, 91 V breakdown, ±5 % tolerance, DO-214AA package | Larger footprint (4.6 mm × 3.9 mm) and higher clamping ratio (132 V at 43.5 A) reduce board density and increase stress on protected ICs | Choose only if legacy DO-214AA layout exists; requires PCB redesign to fit BZD27B91P-HE3_A18's DO-219AB footprint. |
Compared with SMBJ90A-E3/52 and P6SMB91A, BZD27B91P-HE3_A18 offers tighter voltage tolerance, lower clamping voltage, smaller DO-219AB package, and AEC-Q101 qualification-making it optimal for space-constrained, high-precision automotive and industrial regulation where both stability and surge resilience are required.
Availability
BZD27B91P-HE3_A18 is available at Aetrix Electronics and suitable for automotive power management, industrial DC bus protection, and high-temperature sensor reference designs requiring stable component supply, long-lifecycle support, and AEC-Q101 compliance.
Supply support for BZD27B91P-HE3_A18 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 targets high-stability Zener regulation and transient suppression in harsh-environment applications, with emphasis on AEC-Q101 qualification, low-profile packaging, and precise voltage control across extended temperature ranges.
FAQ
What is the maximum clamping voltage of BZD27B91P-HE3_A18 under surge conditions?
The BZD27B91P-HE3_A18 exhibits a maximum clamping voltage (VC) of 122 V at a peak surge current (IRSM) of 75 A using the 10/1000 μs waveform. This value is measured per IEC 60-1 and ensures reliable protection of downstream 100 V-rated components during automotive load dump events. The BZD27B91P-HE3_A18 maintains this performance across its full operating temperature range.
Is BZD27B91P-HE3_A18 qualified for automotive use?
Yes, BZD27B91P-HE3_A18 is explicitly AEC-Q101 qualified, as indicated by the "-HE3" suffix in its ordering code. It meets stress test requirements for temperature cycling, humidity, mechanical shock, and ESD (HBM >8 kV, MM >800 V). The BZD27B91P-HE3_A18 is approved for use in engine control units, battery management systems, and ADAS power supplies where automotive-grade reliability is mandatory.
What package type does BZD27B91P-HE3_A18 use, and what are its key mechanical dimensions?
BZD27B91P-HE3_A18 uses the DO-219AB (SMF) package, a low-profile surface-mount outline measuring 2.9 mm × 1.7 mm × 0.85 mm. Its footprint matches SOD-123W layouts, and it features a cathode band on the top surface. The BZD27B91P-HE3_A18 is rated MSL Level 1 and supports peak reflow temperatures up to 260 °C without preconditioning.
How does the temperature coefficient of BZD27B91P-HE3_A18 affect its regulation accuracy?
The BZD27B91P-HE3_A18 has a positive temperature coefficient of +0.09 to +0.13 %/°C, meaning its Zener voltage increases predictably with junction temperature. This allows designers to compensate for thermal drift in precision reference circuits. For example, over a 100 °C rise (25 °C to 125 °C), VZ shifts by ~9–13 V-information used in feedback network design to maintain system-level accuracy. The BZD27B91P-HE3_A18's stable TC supports operation up to 175 °C.
Can BZD27B91P-HE3_A18 be used as both a voltage reference and a transient suppressor?
Yes, BZD27B91P-HE3_A18 is engineered for dual functionality: as a precision shunt regulator (with ±2 % VZ tolerance and 60 Ω dynamic resistance) and as a transient voltage suppressor (with 150 W 10/1000 μs surge rating and 122 V clamping). Its low leakage (<5 μA) and stable TC make it suitable for reference roles, while its rugged construction and AEC-Q101 qualification support surge protection in automotive and industrial power rails. The BZD27B91P-HE3_A18 performs both functions without compromise.
BZD27B91P-HE3_A18 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_A18 FAQ
1.How can I place an order for BZD27B91P-HE3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27B91P-HE3_A18 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_A18 reliable?
The price and inventory of BZD27B91P-HE3_A18 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_A18 is usually 5 days.
3.What payment methods are accepted for BZD27B91P-HE3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27B91P-HE3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27B91P-HE3_A18?
BZD27B91P-HE3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27B91P-HE3_A18 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_A18?
For technical support, including BZD27B91P-HE3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27B91P-HE3_A18 requirements.
6.How does Aetrix verify that BZD27B91P-HE3_A18 is sourced from the original manufacturer or authorized distributors?
All BZD27B91P-HE3_A18 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_A18 meets industry standards.
7.What is the process for return or replacement of BZD27B91P-HE3_A18?
All BZD27B91P-HE3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with BZD27B91P-HE3_A18, 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_A18 part is unused and in its original packaging.
Return procedure for BZD27B91P-HE3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZD27B91P-HE3_A18 Tags
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