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Vishay BZD27B39P-HE3_A18
- Part No.:
- BZD27B39P-HE3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
BZD27B39P-HE3_A18.pdf
- Description:
- ZENER DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,585
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Product details
Overview
BZD27B39P-HE3_A18 from Vishay Semiconductors is an AEC-Q101-qualified, unidirectional silicon planar Zener diode in SMF (DO-219AB) package, rated for 39 V nominal Zener voltage at 10 mA test current, 52.5 V clamping voltage at 5 A surge current, and 150 W non-repetitive peak surge power, used for overvoltage protection in automotive power rails and industrial DC supplies.
For engineers reviewing the BZD27B39P-HE3_A18 datasheet, BZD27B39P-HE3_A18 pinout, BZD27B39P-HE3_A18 application, or BZD27B39P-HE3_A18 equivalent, key selection criteria include its ±2 % VZ tolerance, -65 °C to +175 °C operating temperature range, MSL level 1 moisture sensitivity, and 2.8 %/°C temperature coefficient - all critical for robust transient suppression in high-reliability systems.
Technical Context
This device operates as a unidirectional voltage clamp with single-diode configuration, leveraging silicon planar junction technology to deliver stable reverse breakdown behavior under both steady-state regulation and transient surge conditions. Its design supports dual-mode operation: precision voltage reference (IZT = 10 mA) and high-energy transient suppression (IRSM = 5 A, 10/1000 μs waveform).
The BZD27B39P-HE3_A18 integrates low dynamic impedance (21 Ω typical at IZT), low leakage (<5 μA at VR = 33 V), and high surge robustness (150 W PRSM) within a thermally optimized SOD-123W-compatible SMF package. It meets JESD201 Class 2 whisker resistance and AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener voltage (VZ) | 38.22 V min. to 39.78 V max. at 10 mA - ensures tight ±2 % tolerance for accurate clamping in safety-critical circuits |
| Clamping voltage (VC) | 52.5 V at 5 A (10/1000 μs) - defines maximum voltage seen by protected IC during surge events |
| Surge power (PRSM) | 150 W - enables handling of high-energy transients per IEC 61000-4-5 without degradation |
| Junction temperature (TJ) | 175 °C max. - supports operation in under-hood automotive environments and industrial enclosures |
| Dynamic resistance (ZZ) | 21 Ω typical at 10 mA - minimizes voltage shift under varying load current, improving regulation stability |
| Temperature coefficient (αVZ) | +0.06 %/°C to +0.11 %/°C - enables predictable VZ drift across wide thermal ranges |
| Leakage current (IR) | <5 μA at 33 V reverse - reduces standby power loss and avoids false triggering in low-power systems |
Pinout & Package
Package: SMF (DO-219AB), low-profile surface-mount case compatible with SOD-123W footprint; dimensions 2.7 mm × 1.9 mm × 0.85 mm; cathode marked by band on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential node in protection circuit; must be routed with adequate copper area for thermal dissipation |
| Cathode | Current exit terminal during reverse breakdown | Marked by band; connected to protected line (e.g., 39 V rail); determines clamping polarity and direction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS power domains |
| MSL Level 1 rating | Enables standard reflow soldering without baking; peak temperature up to 260 °C supported |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth in long-life deployments, critical for aerospace and medical systems |
| ESD robustness | HBM > 8 kV / MM > 800 V - protects against assembly- and field-level electrostatic discharge |
| Low-profile SMF package | 0.85 mm height enables use in space-constrained modules such as battery management systems |
Applications
| Automotive Power Rail Protection | Industrial DC Supply Clamping |
|---|---|
Use Scenario: Protecting 36 V–42 V battery-fed ECUs from load-dump transients (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional voltage clamp placed between supply rail and ground, conducting only during overvoltage events. Use Value: Limits peak rail voltage to ≤52.5 V, preventing damage to downstream 40 V-rated regulators and microcontrollers. | Use Scenario: Safeguarding programmable logic controllers (PLCs) powered from 48 V industrial supplies against switching surges. IC Role / Device Role / Timing Role: Standby protection element that remains non-conductive until transient exceeds 39 V threshold. Use Value: Absorbs 150 W surge energy without failure, maintaining system uptime and eliminating need for redundant fusing. |
| Telecom DC-DC Converter Output Protection | Renewable Energy Charge Controller Regulation |
Use Scenario: Secondary-side overvoltage suppression on isolated 39 V telecom power modules subject to feedback loop faults. IC Role / Device Role / Timing Role: Precision Zener reference and clamp combined - sets regulation point while limiting fault excursions. Use Value: Maintains ±2 % output accuracy during normal operation and clamps to 52.5 V within nanoseconds during failure modes. | Use Scenario: Voltage stabilization in solar charge controllers managing LiFePO4 battery banks with nominal 36 V charging profiles. IC Role / Device Role / Timing Role: Temperature-stable shunt regulator ensuring consistent float voltage despite ambient swings from -40 °C to +85 °C. Use Value: +0.06 %/°C αVZ minimizes drift across operating range, preserving battery health and cycle life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ39A | TVS diode with 39 V standoff, 63.6 V clamping at 10 A, higher capacitance (150 pF) | Designed for faster ESD/EMP transients; less precise DC regulation | Select when surge speed matters more than DC voltage accuracy |
| BZX84-C39 | SOT-23 package, ±5 % VZ tolerance, 250 mW Ptot, no AEC-Q101 qualification | Limited to low-energy consumer electronics; unsuitable for automotive or industrial surge duty | Choose only for cost-sensitive, non-safety-critical board-level protection |
Compared with SMBJ39A and BZX84-C39, the BZD27B39P-HE3_A18 uniquely balances ±2 % precision, 150 W surge capability, AEC-Q101 qualification, and low-profile SMF packaging - making it the only option qualified for automotive-grade transient suppression where both accuracy and ruggedness are mandatory.
Availability
BZD27B39P-HE3_A18 is available at Aetrix Electronics and suitable for automotive power management, industrial PLCs, telecom DC-DC converters, and renewable energy charge controllers requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZD27B39P-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 demanding industrial and automotive applications.
The BZD27B Series belongs to Vishay's eSMP® Zener portfolio, engineered specifically for high-surge, high-temperature environments where precision clamping and AEC-Q101 compliance are required - not general-purpose regulation.
FAQ
What is the Zener voltage tolerance of the BZD27B39P-HE3_A18?
The BZD27B39P-HE3_A18 has a nominal Zener voltage of 39 V with a guaranteed tolerance of ±2 %, meaning the actual breakdown voltage falls between 38.22 V and 39.78 V at 10 mA test current. This tight tolerance is confirmed in the Vishay datasheet (Document No. 85921, Rev. 2.1) and is maintained across the full operating temperature range of -65 °C to +175 °C. The BZD27B39P-HE3_A18 achieves this via silicon planar junction process control and post-trim screening.
Does the BZD27B39P-HE3_A18 support reflow soldering?
Yes, the BZD27B39P-HE3_A18 is fully compatible with standard lead-free reflow soldering processes, including peak temperatures up to 260 °C, as verified by its MSL Level 1 rating per J-STD-020. The SMF (DO-219AB) package uses UL 94 V-0 molding compound and is qualified for wave and reflow soldering without preconditioning. This makes the BZD27B39P-HE3_A18 suitable for high-volume automated assembly in automotive and industrial manufacturing lines.
What is the maximum clamping voltage of the BZD27B39P-HE3_A18 during a surge event?
The BZD27B39P-HE3_A18 clamps to a maximum of 52.5 V at 5 A under the 10/1000 μs surge waveform, as specified in the Vishay datasheet (page 3, "Electrical Characteristics" table). This value represents the peak voltage imposed on the protected circuit during standardized transient testing and is directly tied to the device's 150 W non-repetitive peak surge power rating. The BZD27B39P-HE3_A18 maintains this clamping performance across its full operating temperature range.
Is the BZD27B39P-HE3_A18 qualified for automotive applications?
Yes, the BZD27B39P-HE3_A18 is explicitly AEC-Q101 qualified, as indicated by the "-HE3" suffix in its ordering code and confirmed in the Vishay datasheet (page 1, "FEATURES"). It also meets JESD201 Class 2 whisker resistance and supports HBM ESD > 8 kV / MM > 800 V - all requirements for under-hood and chassis-mounted automotive electronics. The BZD27B39P-HE3_A18 is intended for use in engine control, body electronics, and ADAS power domains.
How does the temperature coefficient affect the BZD27B39P-HE3_A18 in real-world operation?
The BZD27B39P-HE3_A18 exhibits a positive temperature coefficient of +0.06 %/°C to +0.11 %/°C, meaning its Zener voltage increases slightly with rising junction temperature. At 39 V nominal, this translates to ~23 mV/°C drift - predictable and linear across -65 °C to +175 °C. This behavior is leveraged in temperature-compensated reference designs and ensures stable clamping in high-ambient environments. The BZD27B39P-HE3_A18's coefficient is tightly controlled and documented in the datasheet's electrical characteristics table.
BZD27B39P-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):
- 33V (Max)
- Voltage - Breakdown (Min):
- 38.22V
- Voltage - Clamping (Max) @ Ipp:
- 52.5V
- Current - Peak Pulse (10/1000µs):
- 2.8A
- 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)
BZD27B39P-HE3_A18 FAQ
1.How can I place an order for BZD27B39P-HE3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27B39P-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 BZD27B39P-HE3_A18 reliable?
The price and inventory of BZD27B39P-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 BZD27B39P-HE3_A18 is usually 5 days.
3.What payment methods are accepted for BZD27B39P-HE3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27B39P-HE3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27B39P-HE3_A18?
BZD27B39P-HE3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27B39P-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 BZD27B39P-HE3_A18?
For technical support, including BZD27B39P-HE3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27B39P-HE3_A18 requirements.
6.How does Aetrix verify that BZD27B39P-HE3_A18 is sourced from the original manufacturer or authorized distributors?
All BZD27B39P-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 BZD27B39P-HE3_A18 meets industry standards.
7.What is the process for return or replacement of BZD27B39P-HE3_A18?
All BZD27B39P-HE3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with BZD27B39P-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 BZD27B39P-HE3_A18 part is unused and in its original packaging.
Return procedure for BZD27B39P-HE3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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