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Vishay General Semiconductor - Diodes Division BZW04-40HE3/54
- Part No.:
- BZW04-40HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-40HE3/54.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,618
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Product details
Overview
BZW04-40HE3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed for robust overvoltage protection of signal and power lines. It features a 40.2 V standoff voltage (VWM), 44.7–49.4 V breakdown range (VBR at 1 mA), 64.8 V clamping voltage (VC) at 6.2 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the BZW04-40HE3/54 datasheet, BZW04-40HE3/54 pinout, BZW04-40HE3/54 application, or BZW04-40HE3/54 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, DO-41 mechanical dimensions, clamping performance under surge conditions, and direct alternatives for ESD/surge-critical designs requiring RoHS-compliant, automotive-grade transient suppression.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, delivering consistent clamping behavior across positive and negative transients without polarity marking. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and low incremental surge resistance, enabling precise voltage limiting during fast-rising ESD or inductive-switching events.
Rated for 175 °C maximum junction temperature and qualified to AEC-Q101, the device sustains repetitive 400 W surges at 0.01 % duty cycle while maintaining thermal stability on standard PCB copper. The 10/1000 μs waveform compliance aligns with IEC 61000-4-5 Level 3/4 surge immunity requirements for industrial and automotive electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM Standoff Voltage | 40.2 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR Breakdown Voltage | 44.7–49.4 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering within specified tolerance band. |
| VC Clamping Voltage | 64.8 V at 6.2 A IPPM - Peak voltage seen by protected circuit during full-rated 10/1000 μs surge; determines downstream component stress. |
| PPPM Peak Pulse Power | 400 W - Sustained transient energy handling capability per single 10/1000 μs event; enables protection against lightning-induced surges. |
| IPPM Peak Pulse Current | 6.2 A - Maximum non-repetitive surge current supported at rated waveform; directly tied to PCB trace and layout current-handling design. |
| TJ Max Operating Temperature | 175 °C - Junction temperature limit supporting operation in under-hood automotive or high-ambient industrial environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronic systems per stress test requirements including HTOL, TC, HAST, and UHAST. |
Pinout & Package
DO-41 (DO-204AL) molded epoxy package with matte tin-plated leads; bidirectional symmetry means no cathode marking - both terminals are electrically identical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals serve as bidirectional avalanche junction endpoints; no polarity dependency simplifies PCB layout and orientation. |
| Case (body) | Mechanical mounting / thermal path | Epoxy-molded DO-41 body provides mechanical rigidity and limited thermal dissipation; requires adequate copper pour for sustained pulse handling. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enables stable, low-leakage (<1.0 μA) operation across -55 °C to +175 °C and ensures long-term reliability under humidity and thermal cycling. |
| 400 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 surge immunity up to 1 kV open-circuit / 0.5 kV source impedance in industrial control applications. |
| AEC-Q101 qualification (HE3 suffix) | Validates suitability for automotive powertrain, body electronics, and ADAS sensor interfaces where field failure is unacceptable. |
| UL 94 V-0 compliant molding compound | Meets flammability safety standards for enclosed industrial equipment and automotive ECUs requiring fire-retardant encapsulation. |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal stress, critical for long-life deployments in aerospace and medical-grade systems. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and inductive switching transients in engine control units. IC Role / Device Role: Bidirectional clamping element placed between signal line and ground, absorbing ±200 V transients without forward conduction. Use Value: Maintains signal integrity below 64.8 V clamping threshold while surviving >1000 surges per AEC-Q101 lifetime testing. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and motor drive noise in factory automation. IC Role / Device Role: Primary surge shunt across 24 V DC input terminals, diverting energy away from optocoupler and microcontroller input stages. Use Value: Enables >400 W transient absorption without derating at 75 °C ambient, reducing need for external heatsinking or redundancy. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in network edge devices from ESD and lightning-induced surges on outdoor cabling. IC Role / Device Role: Secondary-level TVS placed after gas discharge tube (GDT) front-end, providing fast-response clamping for residual transients. Use Value: Sub-1 ns response time limits voltage overshoot to <65 V, preventing latch-up in 3.3 V or 5 V interface ICs. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers connected to microcontroller GPIOs. IC Role / Device Role: Low-capacitance (typ. 100 pF at 0 V) bidirectional clamp across motor terminals and MCU sense lines. Use Value: Prevents false triggering of overvoltage interrupts while sustaining 40 A IFSM surge current during stall conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40CA | DO-214AA package (larger footprint), 400 W rating, 64.5 V VC at 6.2 A - identical clamping but higher thermal mass and 1.5× board area. | Preferred where PCB space allows and higher thermal inertia improves multi-pulse robustness; not AEC-Q101 qualified. | Select SMBJ40CA only if DO-41 footprint constraint is relaxed and automotive qualification is not required. |
| 1.5KE40CA | DO-201AD package, 1500 W rating, 64.3 V VC at 23.3 A - significantly higher power but slower response (>1 ns) and larger size. | Suitable for primary-level AC/DC input protection; over-specified for signal-line use and incompatible with fine-pitch layouts. | Choose 1.5KE40CA only for bulk power rail protection where surge energy exceeds 400 W and response speed is secondary. |
Compared with BZW04-40HE3/54, SMBJ40CA offers greater thermal margin but lacks AEC-Q101 validation and increases PCB real estate, while 1.5KE40CA delivers higher surge capacity at the cost of response time and layout compatibility - making BZW04-40HE3/54 optimal for space-constrained, automotive-grade signal-line protection.
Availability
BZW04-40HE3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer appliance motor control requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZW04-40HE3/54 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 General Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The BZW04 series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments where AEC-Q101 qualification, stable clamping, and bidirectional symmetry are mandatory.
FAQ
What is the clamping voltage of BZW04-40HE3/54 at its rated peak pulse current?
The BZW04-40HE3/54 has a maximum clamping voltage (VC) of 64.8 V at 6.2 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per IEC 61000-4-5 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings. The BZW04-40HE3/54 maintains this clamping performance across its full operating temperature range (-55 °C to +175 °C).
Is BZW04-40HE3/54 unidirectional or bidirectional?
BZW04-40HE3/54 is a bidirectional Transient Voltage Suppressor, as confirmed by its "B"-suffixed family designation and absence of polarity marking on the DO-41 package. Its electrical characteristics - including symmetrical breakdown (44.7–49.4 V) and clamping behavior - apply identically in both directions, making it ideal for AC-coupled signal lines, differential buses like RS-485, and any application where voltage transients may occur with either polarity. The BZW04-40HE3/54 does not require orientation during placement.
Does BZW04-40HE3/54 meet automotive qualification standards?
Yes, BZW04-40HE3/54 is AEC-Q101 qualified, as indicated by the "HE3" suffix per Vishay's ordering nomenclature. This certification covers stress tests including high-temperature operating life (HTOL), temperature cycling (TC), highly accelerated stress test (HAST), and unbiased highly accelerated stress test (UHAST). The BZW04-40HE3/54 is approved for use in automotive powertrain, chassis, and body electronics where reliability under thermal, mechanical, and electrical stress is mission-critical.
What is the standoff voltage (VWM) of BZW04-40HE3/54, and why does it matter?
The standoff voltage (VWM) of BZW04-40HE3/54 is 40.2 V - the maximum DC or RMS voltage that can be continuously applied without triggering avalanche conduction. This parameter establishes the design margin between normal operating voltage and transient clamping onset; selecting a VWM ≥10–15 % above system nominal voltage (e.g., 36 V for a 33 V automotive rail) prevents nuisance conduction while preserving headroom for ripple and tolerance. The BZW04-40HE3/54's 40.2 V VWM supports 24 V and 36 V systems with robust margin.
Can BZW04-40HE3/54 replace older BZW04-40 variants in existing designs?
Yes, BZW04-40HE3/54 is a direct replacement for legacy BZW04-40 parts with HE3 suffix compliance, retaining identical electrical specs (VWM, VBR, VC, PPPM), DO-41 mechanical outline, and solderability per J-STD-002. The "HE3" denotes AEC-Q101 qualification and JESD201 Class 2 whisker resistance - enhancements that improve reliability without altering form, fit, or function. No PCB or schematic changes are needed when upgrading to BZW04-40HE3/54 in validated designs.
BZW04-40HE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 6.2A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
BZW04-40HE3/54 FAQ
1.How can I place an order for BZW04-40HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-40HE3/54 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 BZW04-40HE3/54 reliable?
The price and inventory of BZW04-40HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-40HE3/54 is usually 5 days.
3.What payment methods are accepted for BZW04-40HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-40HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-40HE3/54?
BZW04-40HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-40HE3/54 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 BZW04-40HE3/54?
For technical support, including BZW04-40HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-40HE3/54 requirements.
6.How does Aetrix verify that BZW04-40HE3/54 is sourced from the original manufacturer or authorized distributors?
All BZW04-40HE3/54 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 BZW04-40HE3/54 meets industry standards.
7.What is the process for return or replacement of BZW04-40HE3/54?
All BZW04-40HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-40HE3/54, 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 BZW04-40HE3/54 part is unused and in its original packaging.
Return procedure for BZW04-40HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-40HE3/54 Tags
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