My Inquiry
My Account
Vishay BZD27B43P-HE3_A08
- Part No.:
- BZD27B43P-HE3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
BZD27B43P-HE3_A08.pdf
- Description:
- ZENER DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,929
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZD27B43P-HE3_A08 from Vishay Semiconductors is a surface-mount, AEC-Q101-qualified Zener diode with nominal 43 V breakdown voltage (±2 % tolerance), 10 mA test current, 36 V clamping voltage at 5 A surge, and 150 W peak surge power rating. It serves as a precision voltage reference and transient overvoltage protector in automotive power rails and industrial DC bus monitoring circuits.
For engineers reviewing the BZD27B43P-HE3_A08 datasheet, BZD27B43P-HE3_A08 pinout, BZD27B43P-HE3_A08 application, or BZD27B43P-HE3_A08 equivalent, key selection criteria include its ±2 % VZ tolerance, 0.07 to 0.12 %/°C temperature coefficient, DO-219AB (SMF) package compatibility, and AEC-Q101 qualification for under-hood automotive use.
Technical Context
This unidirectional Zener diode operates in reverse-bias breakdown mode to regulate or clamp voltage with low dynamic resistance (24 Ω typical at 10 mA) and tight voltage tolerance. Its thermal design supports junction temperatures up to 175 °C and uses a copper-pad–optimized layout (3 mm × 3 mm) for RthJA = 180 K/W.
The device delivers 150 W non-repetitive surge power under 10/1000 μs waveform conditions and exhibits low leakage (≤5 μA at 36 V), enabling reliable operation in high-temperature automotive environments and industrial power supply protection stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 42.14 V min. / 43 V nom. / 43.86 V max. - enables precise 43 V regulation with ±2 % tolerance for stable reference or clamping. |
| Test Current (IZT) | 10 mA - defines operating point for specified VZ; ensures stable regulation under typical bias conditions. |
| Clamping Voltage (VC) | 57.9 V at IRSM = 5 A - limits transient overvoltage to safe levels during 10/1000 μs surges in power rail protection. |
| Peak Surge Power (PRSM) | 150 W - sustains short-duration energy transients without failure, critical for ISO 7637-2 pulse suppression. |
| Temperature Coefficient (αVZ) | 0.07 %/°C min. / 0.12 %/°C max. - ensures predictable VZ drift across -65 °C to +175 °C operating range. |
| Package | DO-219AB (SMF) - low-profile SMD outline (2.7 × 3.5 × 0.85 mm) compatible with automated reflow assembly and space-constrained layouts. |
| AEC-Q101 Qualified | Yes - validated for automotive applications including engine control units, body electronics, and ADAS power domains. |
Pinout & Package
DO-219AB (SMF) surface-mount package: 2.7 mm × 3.5 mm × 0.85 mm body, cathode marked by band on top surface, designed for wave and reflow soldering per J-STD-020 MSL level 1 (peak 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / surge return path | Connected to system ground or low-side reference; carries reverse surge current during clamping events. |
| Cathode | Zener breakdown terminal / voltage reference node | Connected to protected line (e.g., 48 V rail); establishes regulated 43 V reference or clamps above that threshold. |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables accurate voltage setting without post-production trimming in automotive sensor supplies and ECU references. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity testing, and whisker resistance (JESD 201 Class 2). |
| 150 W 10/1000 μs surge rating | Meets ISO 7637-2 Pulse 1, 2a, 3a/b requirements for load dump and inductive switching suppression in 48 V systems. |
| Low leakage (≤5 μA at 36 V) | Minimizes standby power loss in always-on modules such as telematics and gateway ECUs. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life before reflow; eliminates baking requirement and simplifies manufacturing logistics. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial 48 V DC Power Distribution |
|---|---|
Use Scenario: Protecting microcontroller I/O and sensor interface lines from load-dump transients in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Unidirectional voltage clamp placed between 12 V/48 V rail and protected node, conducting only during overvoltage events. Use Value: Limits transient voltage to ≤57.9 V at 5 A, preventing damage to 3.3 V or 5 V logic while maintaining AEC-Q101 compliance. |
Use Scenario: Stabilizing reference voltage for isolated DC-DC converter feedback loops in factory automation power supplies. IC Role / Device Role / Timing Role: Precision Zener reference providing 43 V setpoint for optocoupler-based error amplification. Use Value: ±2 % VZ tolerance and 0.07–0.12 %/°C TC ensure <±1.5 % output regulation over -40 °C to +125 °C ambient. |
| On-Board Charger (OBC) Input Stage | Renewable Energy Battery Management System |
Use Scenario: Clamping induced spikes on AC/DC front-end rectifier outputs during grid fault conditions. IC Role / Device Role / Timing Role: Fast-response surge suppressor placed across bulk capacitor terminals to absorb repetitive 10/1000 μs pulses. Use Value: 150 W PRSM rating and 175 °C TJ max. sustain repeated surges without derating in high-power OBC designs. |
Use Scenario: Overvoltage protection for cell-string monitoring ICs in 400–800 V EV battery packs during charging faults. IC Role / Device Role / Timing Role: Cascaded Zener string element providing graded clamping at 43 V per stage for scalable protection architecture. Use Value: Tight 42.14–43.86 V range and low ZZ (24 Ω) ensure consistent voltage division across series-connected devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A-E3/52 | TVS diode (not Zener); higher clamping ratio (69.4 V at 5.8 A), lower VBR (47.8 V min.), no ±2 % VZ tolerance. | Designed for fast transient suppression only; lacks precision regulation capability. | Select when primary need is surge immunity rather than stable DC reference. |
| BZX84-C43-HE3-08 | SOT-23 package; lower PRSM (100 W), wider VZ tolerance (±5 %), same AEC-Q101 qualification. | Limited to low-power signal-level protection due to smaller thermal mass and lower surge rating. | Choose for space-constrained PCBs where 43 V reference is needed but 150 W surge is not required. |
Compared with SMBJ43A-E3/52 and BZX84-C43-HE3-08, BZD27B43P-HE3_A08 uniquely combines ±2 % Zener tolerance, 150 W surge rating, and DO-219AB thermal performance-making it optimal for automotive power rail regulation where both precision and ruggedness are mandatory.
Availability
BZD27B43P-HE3_A08 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial 48 V power distribution, and renewable energy battery management systems requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for BZD27B43P-HE3_A08 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 Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements with emphasis on reliability, power handling, and automotive qualification.
The BZD27B Series targets high-reliability voltage regulation and transient suppression in harsh-environment applications, particularly automotive power systems and industrial DC infrastructure where precision, surge robustness, and qualification rigor are essential.
FAQ
What is the Zener voltage tolerance of BZD27B43P-HE3_A08?
The BZD27B43P-HE3_A08 has a Zener voltage tolerance of ±2 %, specified as 42.14 V minimum to 43.86 V maximum at 10 mA test current. This tight tolerance enables accurate voltage referencing in automotive and industrial applications where regulation stability is critical. The value is measured and guaranteed per Vishay's Rev. 2.1 datasheet (Document Number: 85921).
Is BZD27B43P-HE3_A08 qualified for automotive use?
Yes, BZD27B43P-HE3_A08 is AEC-Q101 qualified, as indicated by the "-HE3" suffix in its ordering code. It meets stress tests including temperature cycling, humidity bias, mechanical shock, and whisker resistance (JESD 201 Class 2). This qualification confirms suitability for under-hood and chassis-mounted automotive electronics per Vishay's official documentation.
What package does BZD27B43P-HE3_A08 use, and what are its dimensions?
BZD27B43P-HE3_A08 uses the DO-219AB (SMF) package: 2.7 mm × 3.5 mm × 0.85 mm body size with cathode band marking. Its footprint requires 1.3 mm × 1.3 mm pad spacing and supports reflow soldering at peak 260 °C (MSL Level 1). Package dimensions are defined in Vishay document S8-V-3915.01-001.
What is the maximum clamping voltage of BZD27B43P-HE3_A08 during a surge event?
The maximum clamping voltage (VC) of BZD27B43P-HE3_A08 is 57.9 V at IRSM = 5 A for a 10/1000 μs waveform. This value is measured under standardized non-repetitive surge conditions and ensures protected circuitry remains below destructive thresholds during ISO 7637-2 compliant transients.
Does BZD27B43P-HE3_A08 have a specified temperature coefficient?
Yes, BZD27B43P-HE3_A08 has a temperature coefficient (αVZ) ranging from +0.07 %/°C minimum to +0.12 %/°C maximum at 10 mA. This positive coefficient indicates VZ increases slightly with junction temperature-a key parameter for designing stable references across wide ambient ranges in automotive and industrial environments.
BZD27B43P-HE3_A08 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):
- 36V (Max)
- Voltage - Breakdown (Min):
- 42.14V
- Voltage - Clamping (Max) @ Ipp:
- 57.9V
- Current - Peak Pulse (10/1000µs):
- 2.5A
- 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)
BZD27B43P-HE3_A08 FAQ
1.How can I place an order for BZD27B43P-HE3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZD27B43P-HE3_A08 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 BZD27B43P-HE3_A08 reliable?
The price and inventory of BZD27B43P-HE3_A08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZD27B43P-HE3_A08 is usually 5 days.
3.What payment methods are accepted for BZD27B43P-HE3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZD27B43P-HE3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZD27B43P-HE3_A08?
BZD27B43P-HE3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZD27B43P-HE3_A08 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 BZD27B43P-HE3_A08?
For technical support, including BZD27B43P-HE3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZD27B43P-HE3_A08 requirements.
6.How does Aetrix verify that BZD27B43P-HE3_A08 is sourced from the original manufacturer or authorized distributors?
All BZD27B43P-HE3_A08 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 BZD27B43P-HE3_A08 meets industry standards.
7.What is the process for return or replacement of BZD27B43P-HE3_A08?
All BZD27B43P-HE3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with BZD27B43P-HE3_A08, 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 BZD27B43P-HE3_A08 part is unused and in its original packaging.
Return procedure for BZD27B43P-HE3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZD27B43P-HE3_A08 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
