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Vishay BZD27B27P-HE3_A18
- Part No.:
- BZD27B27P-HE3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
BZD27B27P-HE3_A18.pdf
- Description:
- ZENER DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,876
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Product details
Overview
BZD27B27P-HE3_A18 from Vishay Semiconductors is a surface-mount silicon planar Zener diode rated for 27 V nominal Zener voltage (26.46–27.54 V), 25 mA test current, and 150 W non-repetitive peak surge power (10/1000 μs). It features ±2 % voltage tolerance, low dynamic resistance (20 Ω max at IZT), and AEC-Q101 qualification for automotive-grade reliability in overvoltage protection circuits.
For engineers reviewing the BZD27B27P-HE3_A18 datasheet, BZD27B27P-HE3_A18 pinout, BZD27B27P-HE3_A18 application, or BZD27B27P-HE3_A18 equivalent, key selection criteria include its 150 W surge rating, 3.9 V clamping voltage at 22 A, temperature coefficient of +0.06 to +0.11 %/°C, and DO-219AB (SMF) package compatibility with high-density PCB layouts.
Technical Context
This unidirectional Zener diode operates as a precision voltage reference and transient voltage suppressor in DC bias and surge protection applications. Its design integrates low leakage current (<5 μA at VR = 22 V), stable Zener impedance (20 Ω max), and robust thermal performance (RthJA = 180 K/W on 3 mm × 3 mm Cu pads).
The device meets JESD201 Class 2 whisker testing, MSL Level 1 per J-STD-020 (peak reflow ≤260 °C), and AEC-Q101 qualification-enabling use in automotive power supply rails, industrial sensor interfaces, and telecom front-end protection where long-term parametric stability and surge resilience are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener voltage (VZ) | 26.46–27.54 V at 25 mA - tight ±2 % tolerance enables accurate voltage regulation in feedback loops and reference circuits. |
| Clamping voltage (VC) | 36.3 V at 22 A (10/1000 μs) - defines maximum voltage seen by protected circuit during surge events. |
| Peak surge power (PRSM) | 150 W (10/1000 μs) - supports high-energy transient suppression without failure in automotive load-dump or ESD scenarios. |
| Dynamic resistance (ZZ) | 20 Ω max at IZT = 25 mA - ensures minimal voltage shift under varying load current, critical for stable reference performance. |
| Temperature coefficient (αVZ) | +0.06 to +0.11 %/°C - positive drift allows predictable voltage increase with junction temperature, aiding thermal compensation design. |
| Junction temperature (Tj) | 175 °C max - enables operation in under-hood automotive environments and high-ambient industrial enclosures. |
| Package | DO-219AB (SMF) - low-profile 2.7 × 3.5 mm surface-mount outline with cathode marking, optimized for automated assembly and space-constrained layouts. |
Pinout & Package
DO-219AB (SMF) package: 2-terminal, unidirectional, cathode-marked surface-mount device with 2.7 mm × 3.5 mm footprint and 1.08 mm height. Compliant with IPC-7351B standard for SMD placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction; connected to lower-potential node in Zener mode. | Must be held at least 0.7 V below cathode to avoid forward conduction; determines polarity of protection path. |
| Cathode | Current exit terminal during forward conduction; connected to higher-potential node in Zener mode. | Marked side of package; ties to rail being protected (e.g., 24 V supply); defines clamping direction for transients. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS power domains, with extended temperature cycling and humidity testing. |
| 150 W surge rating (10/1000 μs) | Withstands high-energy transients per ISO 7637-2 Pulse 5a without degradation-critical for 24 V vehicle systems. |
| ±2 % VZ tolerance | Reduces need for post-production trimming in voltage reference designs and improves batch consistency in production calibration. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture-induced popcorn failure or delamination risk. |
| Low leakage (<5 μA at 22 V) | Minimizes standby power loss in always-on circuits such as battery-backed sensors and telematics modules. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Suppressing load-dump transients on 24 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional Zener clamp placed across input rail to shunt excess energy into ground during ISO 7637-2 Pulse 5a events. Use Value: Limits rail voltage to ≤36.3 V during 22 A surges, preventing damage to downstream DC-DC converters and microcontrollers. |
Use Scenario: Stabilizing reference voltage for 4–20 mA current-loop transmitters in process automation. IC Role / Device Role / Timing Role: Precision Zener element providing 27 V bias to op-amp feedback network and current-sense amplifier. Use Value: Maintains ±2 % regulation over temperature and life, ensuring <0.1 % full-scale error in analog output accuracy. |
| Telecom Line Interface Protection | Medical Equipment Power Sequencing |
|
Use Scenario: Guarding Ethernet PHY power pins against ESD and lightning-induced surges in outdoor base stations. IC Role / Device Role / Timing Role: Fast-response transient voltage suppressor placed between isolated DC supply and PHY IC VDD pin. Use Value: Clamps 8 kV HBM ESD events within nanoseconds while adding <1 pF capacitance-preserving signal integrity up to 100 MHz. |
Use Scenario: Enabling controlled power-up sequencing in diagnostic imaging subsystems with multiple voltage rails. IC Role / Device Role / Timing Role: Voltage-reference diode triggering enable logic when main 27 V supply reaches regulation threshold. Use Value: Provides deterministic 27 V turn-on point with <0.1 V hysteresis, eliminating race conditions during cold-start initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27A | TVS diode (not Zener); 27 V standoff, 300 W peak power, bidirectional capability. | Designed for fast-rising ESD/lightning; lacks precision regulation and ±2 % tolerance. | Select SMBJ27A when surge speed (tr < 1 ns) and bidirectional protection dominate over voltage accuracy. |
| BZX84-C27 | SOT-23 Zener; 27 V nominal, ±5 % tolerance, 300 mW PD, no AEC-Q101 or surge rating. | Intended for low-power bias/reference only-not suitable for automotive surge suppression. | Select BZX84-C27 only for cost-sensitive consumer electronics where 150 W surge immunity is unnecessary. |
Compared with SMBJ27A and BZX84-C27, the BZD27B27P-HE3_A18 uniquely combines AEC-Q101 qualification, ±2 % Zener tolerance, and 150 W surge capability in a low-profile DO-219AB package-making it the only option among the three suitable for regulated 27 V reference + automotive-grade transient suppression in a single device.
Availability
BZD27B27P-HE3_A18 is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interfaces, telecom line protection, and medical equipment power sequencing requiring stable component supply and AEC-Q101 compliance.
Supply support for BZD27B27P-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 applications demanding precision voltage regulation and robust surge immunity-designed specifically for automotive electronics and mission-critical industrial systems.
FAQ
What is the Zener voltage tolerance of BZD27B27P-HE3_A18?
The BZD27B27P-HE3_A18 has a nominal Zener voltage of 27 V with a guaranteed range of 26.46 V to 27.54 V at 25 mA test current, corresponding to ±2 % tolerance per the Vishay BZD27B Series specification. This tight tolerance is maintained across the full operating temperature range of -65 °C to +175 °C and supports high-accuracy voltage reference designs without external trimming.
Is BZD27B27P-HE3_A18 qualified for automotive applications?
Yes, BZD27B27P-HE3_A18 is AEC-Q101 qualified, as indicated by the "-HE3" suffix in its ordering code. It undergoes rigorous stress testing-including temperature cycling, humidity bias, and mechanical shock-to meet automotive reliability requirements for use in engine control, body electronics, and ADAS subsystems.
What is the maximum clamping voltage of BZD27B27P-HE3_A18 during a surge event?
The BZD27B27P-HE3_A18 clamps to a maximum of 36.3 V at 22 A under the 10/1000 μs waveform (per IEC 61000-4-5), as specified in the Vishay datasheet. This clamping voltage defines the upper limit imposed on protected circuitry during standardized surge events and is measured with the device mounted on a 3 mm × 3 mm copper pad.
Which package does BZD27B27P-HE3_A18 use, and what are its key dimensions?
BZD27B27P-HE3_A18 uses the DO-219AB (SMF) package: a low-profile surface-mount outline measuring 2.7 mm × 3.5 mm × 1.08 mm with cathode marking. Its footprint matches IPC-7351B standard SMD-2 terminals and supports wave and reflow soldering per J-STD-020 MSL Level 1 (260 °C peak).
Does BZD27B27P-HE3_A18 have a specified dynamic resistance?
Yes, the BZD27B27P-HE3_A18 has a maximum dynamic resistance (ZZ) of 20 Ω at IZT = 25 mA, as confirmed in the Vishay BZD27B Series datasheet. This value reflects the slope of the Zener knee region and directly impacts voltage regulation stability under varying load currents in precision reference applications.
BZD27B27P-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):
- 22V (Max)
- Voltage - Breakdown (Min):
- 26.46V
- Voltage - Clamping (Max) @ Ipp:
- 36.3V
- Current - Peak Pulse (10/1000µs):
- 3.9A
- 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)
BZD27B27P-HE3_A18 FAQ
1.How can I place an order for BZD27B27P-HE3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27B27P-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 BZD27B27P-HE3_A18 reliable?
The price and inventory of BZD27B27P-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 BZD27B27P-HE3_A18 is usually 5 days.
3.What payment methods are accepted for BZD27B27P-HE3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27B27P-HE3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27B27P-HE3_A18?
BZD27B27P-HE3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27B27P-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 BZD27B27P-HE3_A18?
For technical support, including BZD27B27P-HE3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27B27P-HE3_A18 requirements.
6.How does Aetrix verify that BZD27B27P-HE3_A18 is sourced from the original manufacturer or authorized distributors?
All BZD27B27P-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 BZD27B27P-HE3_A18 meets industry standards.
7.What is the process for return or replacement of BZD27B27P-HE3_A18?
All BZD27B27P-HE3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with BZD27B27P-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 BZD27B27P-HE3_A18 part is unused and in its original packaging.
Return procedure for BZD27B27P-HE3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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