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Vishay BZD27B36P-HE3_A18
- Part No.:
- BZD27B36P-HE3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
BZD27B36P-HE3_A18.pdf
- Description:
- ZENER DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,964
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Product details
Overview
BZD27B36P-HE3_A18 from Vishay Semiconductors is a surface-mount, AEC-Q101 qualified Zener diode with nominal breakdown voltage of 36 V, ±2 % tolerance, 10 mA test current, and 48.4 V clamping voltage at 30 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 BZD27B36P-HE3_A18 datasheet, BZD27B36P-HE3_A18 pinout, BZD27B36P-HE3_A18 application, or BZD27B36P-HE3_A18 equivalent, key selection criteria include its DO-219AB (SMF) package, low dynamic resistance (27 Ω), temperature coefficient (+0.06 to +0.11 %/°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 DC power systems. Its silicon planar construction ensures stable reverse breakdown under pulse stress, with thermal impedance optimized for high-energy surge handling via low RthJL (30 K/W) and validated junction-to-ambient performance on 3 mm × 3 mm Cu pads.
The device supports both regulation and protection modes: at 10 mA it maintains 35.28–36.72 V Zener voltage with 27 Ω dynamic resistance, while under 30 A 10/1000 μs surge it clamps to ≤48.4 V - enabling robust overvoltage defense in 12 V/24 V automotive subsystems without derating at elevated ambient temperatures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 35.28 V min. to 36.72 V max. at 10 mA - enables precise 36 V rail stabilization with ±2 % tolerance for ECU voltage monitoring circuits |
| Clamping Voltage (VC) | 48.4 V at IRSM = 30 A (10/1000 μs) - limits transient overvoltage to safe levels during load dump events in automotive power networks |
| Peak Surge Power (PRSM) | 150 W (10/1000 μs waveform) - sustains high-energy transients without failure per ISO 7637-2 Pulse 5a requirements |
| Dynamic Resistance (ZZ) | 21 Ω typ., 40 Ω max. at 10 mA - ensures minimal voltage deviation under varying load current for stable reference applications |
| Temperature Coefficient (αVZ) | +0.06 %/°C min. to +0.11 %/°C max. - provides predictable, positive drift for compensation in wide-temperature-range designs |
| Package | DO-219AB (SMF) - 2.7 × 1.9 × 0.88 mm low-profile SMD footprint compatible with automated reflow assembly and space-constrained PCB layouts |
| AEC-Q101 Qualification | Qualified per AEC-Q101 Rev. E - certified for use in automotive electronic control units requiring zero-defect reliability and extended temperature operation |
Pinout & Package
DO-219AB (SMF) package: 2-terminal unidirectional configuration with cathode marked by polarity band. Dimensions: 2.7 mm × 1.9 mm × 0.88 mm (L × W × H); recommended footprint: 1.3 mm × 2.9 mm pad with 1.4 mm center spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential node in protection configuration | Enables standard cathode-to-rail placement for clamping; requires no external series resistor when used with controlled source impedance |
| Cathode | Current exit terminal in forward bias; connected to protected rail or voltage reference point | Provides defined breakdown path to ground or supply; polarity marking aligns with industry-standard DO-219AB orientation in tape-and-reel delivery |
Key Features
| Feature | Design Value |
|---|---|
| Surge-rated Zener architecture | Validated 150 W peak surge power (10/1000 μs) with 48.4 V clamping - eliminates need for supplemental TVS in mid-power automotive protection stages |
| AEC-Q101 qualification | Full qualification including HTGB, TCT, UHAST, and mechanical shock testing - meets OEM requirements for engine control, body electronics, and ADAS power domains |
| Low-profile SMF package | 0.88 mm height and MSL Level 1 rating - supports high-density layout and single-pass reflow without moisture sensitivity concerns |
| Stable temperature coefficient | +0.06 to +0.11 %/°C range - enables predictable voltage drift compensation in battery management and sensor excitation circuits |
| Low leakage & high stability | 1 μA max. reverse current at rated VWM; <1 % parametric shift after 1000 h life test - ensures long-term accuracy in voltage reference applications |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Voltage Reference |
|---|---|
|
Use Scenario: Suppresses ISO 7637-2 Pulse 5a transients (up to 120 V, 400 ms) induced by alternator load dump in 12 V/24 V vehicle electrical systems. IC Role / Device Role / Timing Role: Unidirectional Zener clamp placed between battery rail and protected IC inputs. Use Value: Limits voltage excursion to ≤48.4 V at 30 A surge, preventing damage to microcontrollers and analog front-ends without adding bulk capacitance or active circuitry. |
Use Scenario: Provides stable 36 V reference for ADC biasing and sensor excitation in engine control modules operating from variable battery voltage. IC Role / Device Role / Timing Role: Precision Zener voltage source in feedback loop of isolated DC-DC converter or analog signal conditioning stage. Use Value: Delivers ±2 % tolerance and +0.06/+0.11 %/°C TC across -40 °C to +125 °C, reducing calibration drift and improving fuel injection timing accuracy. |
| On-Board Charger (OBC) Input Stage Clamp | Industrial PLC Power Rail Stabilization |
|
Use Scenario: Protects AC-DC PFC controller inputs against line surges and switching transients in EV on-board chargers with 400 V nominal input. IC Role / Device Role / Timing Role: Secondary-stage Zener clamp downstream of primary MOV/TVS, absorbing residual energy not handled by front-end protection. Use Value: Withstands 150 W surge power and maintains clamping below 48.4 V, extending lifetime of gate drivers and current sense amplifiers in high-reliability charging systems. |
Use Scenario: Stabilizes 24 V DC auxiliary rails in programmable logic controllers exposed to industrial switching noise and inductive kickback. IC Role / Device Role / Timing Role: Shunt regulator maintaining clean reference for digital I/O supervision and analog input scaling circuits. Use Value: Low 27 Ω dynamic resistance minimizes output voltage variation under load steps, ensuring consistent watchdog timer reset thresholds and analog measurement integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | Higher clamping voltage (60.5 V at 30 A), larger SMB package (4.6 × 3.9 mm), 600 W peak power | Better suited for higher-energy transients but less precise regulation due to wider VBR tolerance (±5 %) | Select SMBJ36A only when higher surge margin outweighs need for tight voltage control and board space constraints allow larger footprint |
| BZX84-C36 | SOT-23 package (3.0 × 1.4 mm), ±5 % VZ tolerance, 300 mW power rating, no AEC-Q101 qualification | Limited to low-energy signal-level protection; unsuitable for automotive power rail clamping or sustained surge duty | Choose BZX84-C36 only for cost-sensitive consumer electronics where AEC-Q101 and 150 W surge capability are not required |
Compared with SMBJ36A and BZX84-C36, the BZD27B36P-HE3_A18 uniquely combines AEC-Q101 qualification, ±2 % voltage tolerance, DO-219AB compactness, and 150 W surge rating - making it the only option suitable for space-constrained, high-reliability automotive power rail protection where both precision and ruggedness are mandatory.
Availability
BZD27B36P-HE3_A18 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC power stabilization, and on-board charger transient suppression requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for BZD27B36P-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 automotive-grade Zener protection with AEC-Q101 qualification, surge resilience, and low-profile packaging - designed specifically for next-generation power management in engine control, ADAS, and electrified vehicle systems.
FAQ
What is the maximum clamping voltage of the BZD27B36P-HE3_A18 under surge conditions?
The BZD27B36P-HE3_A18 clamps to a maximum of 48.4 V at 30 A peak surge current with a 10/1000 μs waveform, as specified in the Vishay datasheet revision 2.1. This value is measured under standardized non-repetitive pulse conditions and defines the upper voltage limit imposed on protected circuits during transient events. The BZD27B36P-HE3_A18 achieves this performance while maintaining its ±2 % Zener voltage tolerance and AEC-Q101 qualification.
Is the BZD27B36P-HE3_A18 suitable for use in automotive engine control units?
Yes, the BZD27B36P-HE3_A18 is explicitly AEC-Q101 qualified and rated for operation from -65 °C to +175 °C, making it suitable for under-hood engine control unit applications. Its DO-219AB package withstands automotive reflow profiles, and its 150 W surge rating meets ISO 7637-2 Pulse 5a requirements. The BZD27B36P-HE3_A18 also passes JESD201 Class 2 whisker testing and MSL Level 1 moisture sensitivity classification.
What is the Zener voltage tolerance and test current for the BZD27B36P-HE3_A18?
The BZD27B36P-HE3_A18 has a nominal Zener voltage of 36 V with a tight ±2 % tolerance, corresponding to a range of 35.28 V to 36.72 V at a test current (IZT) of 10 mA. This specification is guaranteed per the Vishay BZD27B Series datasheet and reflects the device's precision voltage regulation capability. The BZD27B36P-HE3_A18 maintains this tolerance across its qualified temperature range and lifetime.
Does the BZD27B36P-HE3_A18 have a defined polarity marking, and how is it oriented on the PCB?
Yes, the BZD27B36P-HE3_A18 uses the standard DO-219AB (SMF) package with a cathode band marking on the top surface. When mounted with the marking band facing left in top-view orientation, the left terminal is the cathode and the right terminal is the anode. This matches the carrier tape orientation shown in Vishay document S8-V-3717.02-003. The BZD27B36P-HE3_A18 must be placed with cathode toward the protected rail for proper clamping function.
What is the thermal resistance profile of the BZD27B36P-HE3_A18, and how does it affect power dissipation?
The BZD27B36P-HE3_A18 has a junction-to-lead thermal resistance (RthJL) of 30 K/W and a junction-to-ambient resistance (RthJA) of 180 K/W when mounted on a 3 mm × 3 mm Cu pad (≥40 μm thick). This allows 2300 mW power dissipation at lead temperature (TL) of 105 °C, but only 800 mW at ambient (TA) of 30 °C. The BZD27B36P-HE3_A18 leverages low RthJL for efficient heat transfer to the PCB, critical for sustained surge handling in automotive environments.
BZD27B36P-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):
- 30V (Max)
- Voltage - Breakdown (Min):
- 35.28V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 3A
- 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)
BZD27B36P-HE3_A18 FAQ
1.How can I place an order for BZD27B36P-HE3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27B36P-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 BZD27B36P-HE3_A18 reliable?
The price and inventory of BZD27B36P-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 BZD27B36P-HE3_A18 is usually 5 days.
3.What payment methods are accepted for BZD27B36P-HE3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27B36P-HE3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27B36P-HE3_A18?
BZD27B36P-HE3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27B36P-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 BZD27B36P-HE3_A18?
For technical support, including BZD27B36P-HE3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27B36P-HE3_A18 requirements.
6.How does Aetrix verify that BZD27B36P-HE3_A18 is sourced from the original manufacturer or authorized distributors?
All BZD27B36P-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 BZD27B36P-HE3_A18 meets industry standards.
7.What is the process for return or replacement of BZD27B36P-HE3_A18?
All BZD27B36P-HE3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with BZD27B36P-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 BZD27B36P-HE3_A18 part is unused and in its original packaging.
Return procedure for BZD27B36P-HE3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZD27B36P-HE3_A18 Tags
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