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Taiwan Semiconductor Corporation BZW04-8V5B
- Part No.:
- BZW04-8V5B
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-8V5B.pdf
- Description:
- TVS DIODE 8.55VWM 14.5VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,094
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Product details
Overview
BZW04-8V5B from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-204AL (DO-41) package, rated for 400W peak pulse power at 10/1000μs, with 8.55V working stand-off voltage, 9.50–10.5V breakdown voltage at 1mA, and 14.5V maximum clamping voltage at 27.6A peak current. It protects automotive and industrial power rails against ESD and inductive switching transients.
For engineers reviewing the BZW04-8V5B datasheet, BZW04-8V5B pinout, BZW04-8V5B application, or BZW04-8V5B equivalent, this page delivers verified electrical specs, thermal performance data, AEC-Q101 qualification status, DO-41 mechanical dimensions, and real-world protection use cases - all confirmed for the exact BZW04-8V5B variant.
Technical Context
The BZW04-8V5B operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 9.50–10.5V breakdown range at 1mA test current. Its low 14.5V clamping voltage at 27.6A ensures downstream ICs see minimal overvoltage during 400W transients.
With 60°C/W junction-to-lead thermal resistance and 175°C max junction temperature, it sustains repeated surge events under PCB-constrained thermal conditions. Reverse leakage remains ≤10μA at 8.55V, enabling low-power system compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.55 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 9.50 / 10.5 V @ 1 mA - Confirmed avalanche threshold range for reliable turn-on timing |
| VC @ IPP | 14.5 V @ 27.6 A - Clamped voltage during full 400W 10/1000μs surge, limiting stress on protected ICs |
| PPK | 400 W - Peak pulse power handling per single non-repetitive 10/1000μs waveform |
| TJ max | +175 °C - Enables operation in under-hood automotive environments and high-ambient industrial settings |
| RθJL | 60 °C/W - Junction-to-lead thermal resistance supports stable surge recovery with standard lead soldering |
| ID @ VWM | ≤10 μA - Ultra-low leakage preserves battery life and signal integrity in always-on circuits |
Pinout & Package
Package: DO-204AL (DO-41), axial-leaded, cathode band marked on body. RoHS-compliant, halogen-free molding compound; pure tin-plated leads meet J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or low-side return path in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12V rail); conducts during overvoltage to shunt energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| 400W peak pulse rating | Handles ISO 7637-2 Pulse 1, 2a, 3a/b and IEC 61000-4-5 Level 4 surges without degradation |
| 14.5V clamping at 27.6A | Ensures protected MCU I/O or power management IC stays within absolute maximum ratings during transients |
| ≤10μA leakage @ 8.55V | Minimizes standby current draw in battery-powered telematics and sensor modules |
| DO-41 package with 0.300g mass | Enables manual assembly and rework while meeting IPC-7351B footprint standards |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery line in engine control unit exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between rail and ground to clamp transients before they reach PMIC or microcontroller. Use Value: 14.5V clamping prevents latch-up or oxide breakdown in 5V/3.3V domain regulators downstream of the protected rail. |
Use Scenario: 4–20mA current loop input of PLC analog module subjected to field wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: TVS connected across input terminals to divert fast transients before reaching precision op-amp or ADC front-end. Use Value: Sub-10μA leakage avoids offset error in µA-level loop current measurement; DO-41 fits compact DIN-rail module layouts. |
| LED Driver Overvoltage Suppression | ESD-Sensitive Communication Port Protection |
Use Scenario: Constant-current LED driver output in automotive lighting subjected to inductive switching spikes from relay coils. IC Role / Device Role / Timing Role: TVS placed across LED string output to absorb energy from back-EMF during switch-off. Use Value: 400W rating handles repetitive 100V/10ms spikes; 175°C TJ max supports sealed headlamp thermal environments. |
Use Scenario: CAN transceiver VCC pin in vehicle infotainment gateway exposed to ESD per ISO 10605 ±8kV contact discharge. IC Role / Device Role / Timing Role: Secondary TVS on supply rail to complement internal transceiver ESD structure and prevent latch-up. Use Value: Fast response time and low clamping voltage reduce risk of supply rail collapse during ESD event, maintaining CAN bus arbitration integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5A | DO-214AA package; 8.5V VWM, 13.6V VC @ 30.2A; same 400W rating but higher thermal resistance (RθJA = 110°C/W) | Surface-mount only; requires reflow-compatible layout; less suitable for through-hole legacy designs or high-vibration mounting | Select SMBJ8.5A only when board space constraints mandate SMD and thermal design accommodates higher ambient rise. |
| P6KE8.5A | DO-15 package; 8.5V VWM, 13.6V VC @ 29.1A; 600W rating but larger footprint and higher leakage (50μA @ VWM) | Higher surge margin but incompatible with DO-41 footprint; not AEC-Q101 qualified | Choose P6KE8.5A only for non-automotive industrial applications where AEC-Q101 is unnecessary and 600W headroom justifies larger size. |
Compared with SMBJ8.5A and P6KE8.5A, the BZW04-8V5B uniquely combines AEC-Q101 qualification, DO-41 through-hole compatibility, ultra-low 10μA leakage, and validated 400W clamping performance - making it optimal for automotive and space-constrained industrial designs requiring proven reliability and serviceability.
Availability
BZW04-8V5B is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and LED driver overvoltage suppression requiring stable component supply and long-term lifecycle support.
Supply support for BZW04-8V5B 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q101 validation capability.
The BZW04 series was engineered specifically for automotive and industrial transient suppression, emphasizing robust clamping, low leakage, and mechanical reliability in harsh environments - with BZW04-8V5B targeting 12V system rail protection.
FAQ
What is the polarity configuration of the BZW04-8V5B?
The BZW04-8V5B is a unidirectional TVS diode, with cathode indicated by a band on the DO-41 body. It conducts in reverse bias above its breakdown voltage and blocks forward current up to its rated IFSM of 40A. This polarity enables precise placement on positive rails where clamping to ground is required - a key distinction from bidirectional variants like BZW04-8V5BB.
Is the BZW04-8V5B AEC-Q101 qualified?
Yes, the BZW04-8V5B is AEC-Q101 qualified, as confirmed in the official Taiwan Semiconductor datasheet (Version J2104). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD - validating its suitability for automotive powertrain and body electronics applications where reliability is mission-critical.
What is the maximum clamping voltage of the BZW04-8V5B and at what current is it specified?
The BZW04-8V5B has a maximum clamping voltage (VC) of 14.5V, measured at a peak impulse current (IPP) of 27.6A using the 10/1000μs waveform. This value is guaranteed across temperature and represents the upper limit of voltage seen by protected circuitry during a full-rated 400W transient event.
Can the BZW04-8V5B be used in bidirectional configurations?
No - the BZW04-8V5B is strictly unidirectional. For bidirectional protection, Taiwan Semiconductor offers the BZW04-8V5BB variant. Using BZW04-8V5B in a bidirectional arrangement would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.
What is the thermal resistance from junction to ambient for the BZW04-8V5B on a standard PCB?
The junction-to-ambient thermal resistance (RθJA) of the BZW04-8V5B is 100°C/W when mounted on a printed circuit board with 10mm lead length. This value assumes standard FR-4 material and defines the temperature rise above ambient per watt of steady-state power dissipation - critical for evaluating derating in enclosed or high-temperature enclosures.
BZW04-8V5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- BZW04
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 8.55V
- Voltage - Breakdown (Min):
- 9.5V
- Voltage - Clamping (Max) @ Ipp:
- 14.5V
- Current - Peak Pulse (10/1000µs):
- 27.6A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
BZW04-8V5B FAQ
1.How can I place an order for BZW04-8V5B through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-8V5B 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 BZW04-8V5B reliable?
The price and inventory of BZW04-8V5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-8V5B is usually 5 days.
3.What payment methods are accepted for BZW04-8V5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-8V5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-8V5B?
BZW04-8V5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-8V5B 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 BZW04-8V5B?
For technical support, including BZW04-8V5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-8V5B requirements.
6.How does Aetrix verify that BZW04-8V5B is sourced from the original manufacturer or authorized distributors?
All BZW04-8V5B 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 BZW04-8V5B meets industry standards.
7.What is the process for return or replacement of BZW04-8V5B?
All BZW04-8V5B units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-8V5B, 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 BZW04-8V5B part is unused and in its original packaging.
Return procedure for BZW04-8V5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-8V5B Tags
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