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Vishay BZD27B20P-HE3_A18
- Part No.:
- BZD27B20P-HE3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
BZD27B20P-HE3_A18.pdf
- Description:
- ZENER DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,580
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Product details
Overview
BZD27B20P-HE3_A18 from Vishay Semiconductors is an AEC-Q101 qualified unidirectional silicon planar Zener diode in SOD-123W-compatible SMF (DO-219AB) package, rated for 20 V nominal Zener voltage at 25 mA test current, 150 W peak surge power (10/1000 μs), and 175 °C maximum junction temperature. It delivers stable voltage regulation and transient overvoltage protection in automotive power rail conditioning circuits.
For engineers reviewing the BZD27B20P-HE3_A18 datasheet, BZD27B20P-HE3_A18 pinout, BZD27B20P-HE3_A18 application, or BZD27B20P-HE3_A18 equivalent, key selection criteria include its ±2 % VZ tolerance, 5.3 V clamping voltage at 27.3 A peak pulse current, low 15 Ω dynamic resistance, and MSL level 1 reflow compatibility up to 260 °C.
Technical Context
This device operates as a precision voltage reference and transient voltage suppressor in unidirectional configuration, with Zener breakdown mechanism and specified clamping behavior under IEC 60-1 10/1000 μs surge conditions. Its thermal design supports 180 K/W junction-to-ambient resistance on standard 3 mm × 3 mm Cu pads.
The BZD27B20P-HE3_A18 exhibits a positive temperature coefficient of +0.06 to +0.11 %/°C and maintains ≤1 μA reverse leakage at 16 V, enabling stable performance across -65 °C to +175 °C operating range without derating penalties typical of lower-grade Zeners.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19.6 V min. to 20.4 V max. at IZT = 25 mA - ensures tight 20 V regulation with ±2 % tolerance for precision biasing |
| Clamping Voltage (VC) | 27.3 V at IRSM = 27.3 A (10/1000 μs) - defines maximum voltage seen by protected circuit during surge events |
| Peak Surge Power (PRSM) | 150 W - enables robust handling of automotive load-dump transients per ISO 7637-2 |
| Dynamic Resistance (ZZ) | 15 Ω max. at IZT = 25 mA - minimizes output voltage deviation under varying load current |
| Junction Temperature (Tj) | 175 °C max. - supports operation in under-hood automotive environments without thermal shutdown |
| ESD Rating | HBM > 8 kV, MM > 800 V - meets AEC-Q101 requirements for electrostatic robustness in assembly and field use |
| Moisture Sensitivity | MSL level 1 (J-STD-020) - allows unlimited floor life and standard reflow without baking |
Pinout & Package
Package: SMF (DO-219AB), low-profile surface-mount case compatible with SOD-123W footprint; dimensions 2.9 mm × 1.4 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; must be routed with adequate copper area for thermal dissipation |
| Cathode | Zener breakdown terminal; voltage reference node | Marked with band; connects to regulated rail or protected line; determines polarity of clamping action |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics requiring zero-defect reliability |
| ±2 % Zener voltage tolerance | Reduces need for post-production trimming and improves system-level voltage margin predictability |
| 150 W 10/1000 μs surge rating | Withstands repeated load-dump pulses without parameter shift or catastrophic failure |
| MSL level 1 and 260 °C reflow compatibility | Eliminates pre-bake steps and supports high-throughput automated assembly |
| Low 15 Ω dynamic impedance | Maintains regulation accuracy under fast transient load changes in DC-DC feedback paths |
Applications
| Automotive Power Rail Protection | Industrial Sensor Biasing |
|---|---|
|
Use Scenario: Protecting 12 V battery-supplied ECUs from ISO 7637-2 Pulse 5a load-dump transients. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed between VBAT and ground. Use Value: Clamps surge to ≤27.3 V while dissipating 150 W, preventing damage to downstream regulators and microcontrollers. |
Use Scenario: Providing stable 20 V reference for analog front-end amplifiers in factory automation sensors. IC Role / Device Role / Timing Role: Precision Zener voltage reference in op-amp bias network. Use Value: Delivers ±2 % tolerance and <1 μA leakage at 16 V, ensuring sensor offset stability over temperature and lifetime. |
| Telecom DC-DC Feedback | Medical Equipment Overvoltage Clamp |
|
Use Scenario: Regulating output voltage in isolated flyback converters for telecom base station power supplies. IC Role / Device Role / Timing Role: Secondary-side Zener reference in optocoupler feedback loop. Use Value: 15 Ω dynamic resistance minimizes output voltage ripple under dynamic load steps, improving PSRR. |
Use Scenario: Safeguarding patient-connected monitoring circuits against accidental 24 V supply misconnection. IC Role / Device Role / Timing Role: Primary overvoltage clamp on isolated power input stage. Use Value: AEC-Q101 qualification and 175 °C Tj rating ensure safety-critical reliability in Class II medical devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A | TVS diode, 20 V standoff, 300 W peak power, bidirectional | Designed for fast transient suppression (clamping time <1 ns), not precision regulation | Select when surge response speed is critical and regulation tolerance is secondary |
| BZX84-C20 | SOT-23 Zener, 20 V, ±5 % tolerance, 300 mW PD, no AEC-Q101 | Limited to low-power signal-level applications; unsuitable for automotive power rails | Select only for cost-sensitive consumer PCBs where AEC-Q101 and surge rating are not required |
Compared with SMBJ20A and BZX84-C20, the BZD27B20P-HE3_A18 uniquely combines AEC-Q101 qualification, ±2 % VZ tolerance, and 150 W surge capability in a miniature SMF package-making it the only option suitable for high-reliability automotive voltage regulation and clamping where both precision and ruggedness are mandatory.
Availability
BZD27B20P-HE3_A18 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor biasing, telecom DC-DC feedback, medical equipment overvoltage clamping, and industrial power supply regulation requiring stable component supply and long-term lifecycle continuity.
Supply support for BZD27B20P-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 regulation and transient suppression, designed specifically to meet AEC-Q101 stress testing and ISO 7637-2 surge immunity requirements in harsh environments.
FAQ
What is the Zener voltage tolerance of BZD27B20P-HE3_A18?
The BZD27B20P-HE3_A18 has a Zener voltage tolerance of ±2 %, with a nominal value of 20 V and a guaranteed range of 19.6 V to 20.4 V at 25 mA test current. This tight tolerance is specified per the BZD27B Series datasheet revision 2.1 and applies directly to the BZD27B20P-HE3_A18 variant, enabling precise voltage reference design without external trimming.
Is BZD27B20P-HE3_A18 qualified for automotive applications?
Yes, BZD27B20P-HE3_A18 is AEC-Q101 qualified, as confirmed by its "-HE3" suffix and documentation in Vishay's BZD27B Series datasheet. It passes stress tests including high-temperature operating life, temperature cycling, and ESD (HBM > 8 kV), making it suitable for under-hood and chassis-mounted automotive electronics.
What package does BZD27B20P-HE3_A18 use, and is it RoHS-compliant?
BZD27B20P-HE3_A18 uses the SMF (DO-219AB) package - a low-profile surface-mount case compatible with SOD-123W footprints. It is RoHS-compliant per the "-HE3" designation and meets UL 94 V-0 flammability rating, with MSL level 1 moisture sensitivity per J-STD-020.
What is the maximum clamping voltage of BZD27B20P-HE3_A18 during surge events?
The BZD27B20P-HE3_A18 clamps to a maximum of 27.3 V at 27.3 A peak pulse current under the standardized 10/1000 μs waveform defined in IEC 60-1. This value is explicitly listed in the Electrical Characteristics table for BZD27B20P on page 3 of the Vishay datasheet and is a key parameter for overvoltage protection design.
Can BZD27B20P-HE3_A18 be used in reflow soldering processes?
Yes, BZD27B20P-HE3_A18 is fully compatible with standard lead-free reflow soldering, with a maximum peak temperature rating of 260 °C and MSL level 1 classification. No pre-baking is required, and it meets J-STD-020 requirements for wave and reflow assembly, as stated in the Vishay BZD27B Series datasheet section "SOLDERING CONDITIONS".
BZD27B20P-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):
- 16V (Max)
- Voltage - Breakdown (Min):
- 19.6V
- Voltage - Clamping (Max) @ Ipp:
- 27.3V
- Current - Peak Pulse (10/1000µs):
- 5.3A
- 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)
BZD27B20P-HE3_A18 FAQ
1.How can I place an order for BZD27B20P-HE3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27B20P-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 BZD27B20P-HE3_A18 reliable?
The price and inventory of BZD27B20P-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 BZD27B20P-HE3_A18 is usually 5 days.
3.What payment methods are accepted for BZD27B20P-HE3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27B20P-HE3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27B20P-HE3_A18?
BZD27B20P-HE3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27B20P-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 BZD27B20P-HE3_A18?
For technical support, including BZD27B20P-HE3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27B20P-HE3_A18 requirements.
6.How does Aetrix verify that BZD27B20P-HE3_A18 is sourced from the original manufacturer or authorized distributors?
All BZD27B20P-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 BZD27B20P-HE3_A18 meets industry standards.
7.What is the process for return or replacement of BZD27B20P-HE3_A18?
All BZD27B20P-HE3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with BZD27B20P-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 BZD27B20P-HE3_A18 part is unused and in its original packaging.
Return procedure for BZD27B20P-HE3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZD27B20P-HE3_A18 Tags
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