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Taiwan Semiconductor Corporation BZW04-10B
- Part No.:
- BZW04-10B
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-10B.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,092
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Product details
Overview
BZW04-10B from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor diode with a working stand-off voltage of 10.2 V, breakdown voltage range 11.4–12.6 V at 1 mA test current, and clamping voltage of 16.7 V at 24.0 A peak impulse current. It protects automotive and industrial power rails against ESD and inductive switching transients.
For engineers reviewing the BZW04-10B datasheet, BZW04-10B pinout, BZW04-10B application, or BZW04-10B equivalent, key selection criteria include its DO-41 package compatibility, 175°C junction temperature rating, low 5 μA reverse leakage at VWM, and AEC-Q101 qualification option (BZW04-10BH).
Technical Context
The BZW04-10B operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 11.4–12.6 V breakdown threshold. Its low dynamic impedance enables rapid clamping to 16.7 V under 10/1000 μs surge conditions, limiting energy dissipation in protected ICs.
Designed for high-reliability environments, it features a 0.078 %/°C temperature coefficient of VBR, 60 °C/W junction-to-lead thermal resistance, and meets JESD201 Class 2 whisker resistance - critical for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10.2 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR @ IT=1 mA | 11.4–12.6 V - Avalanche onset voltage tolerance band defining turn-on consistency |
| VC @ IPP=24.0 A | 16.7 V - Clamped voltage during 400 W 10/1000 μs surge, limiting downstream stress |
| ID @ VWM | 5 μA - Low leakage ensures minimal standby power loss in battery-powered systems |
| PPK | 400 W - Peak pulse power handling per 10/1000 μs waveform, per IEC 61000-4-5 |
| TJ max | 175 °C - Enables operation in high-ambient under-hood or industrial motor-control environments |
| RθJL | 60 °C/W - Supports thermal design with short lead soldering to copper pads |
Pinout & Package
Package: DO-204AL (DO-41), axial-leaded, epoxy-molded case with cathode band marking for unidirectional polarity. Meets UL 94V-0 flammability and J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path in unidirectional TVS configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 12 V rail); conducts during overvoltage to shunt surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant available | BZW04-10BH meets automotive stress-test requirements for temperature cycling, HTRB, and ESD robustness |
| Low clamping ratio (VC/VBR) | 1.47 typical - Ensures tight voltage margin between breakdown and clamping, minimizing overshoot risk |
| Fast response time | <1 ns - Limits transient propagation before protection activates, preserving signal integrity |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU Directive 2011/65/EU - Required for automotive and industrial export compliance |
| High surge current capability | 24.0 A peak impulse current - Sustains repeated 400 W surges without degradation in 12 V automotive load-dump scenarios |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Suppresses load-dump transients on 12 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground, clamping spikes within 1 ns. Use Value: Limits rail voltage to ≤16.7 V during 400 W surges, preventing damage to MCU power supplies and CAN transceivers. | Use Scenario: Shields 24 V digital input modules from inductive kickback in factory automation solenoids. IC Role / Device Role / Timing Role: Standoff-rated TVS across input terminals, absorbing repetitive 10/1000 μs transients. Use Value: Withstands ≥1000 surges at rated PPK, ensuring long-term reliability without derating in harsh EMI environments. |
| LED Driver Overvoltage Clamp | ESD Protection for Sensor Interfaces |
Use Scenario: Guards constant-current LED driver ICs against supply-line transients in streetlight controllers. IC Role / Device Role / Timing Role: Primary overvoltage clamp on driver VCC pin, activated before internal LDO fails. Use Value: 5 μA leakage at 10.2 V minimizes quiescent current impact, extending battery life in solar-powered units. | Use Scenario: Protects analog front-end inputs of temperature/humidity sensors exposed to human-body-model ESD. IC Role / Device Role / Timing Role: Fast-response TVS on signal line, shunting >8 kV HBM events to ground. Use Value: Sub-1 ns response and 16.7 V clamping prevent latch-up in precision ADCs with 3.3 V supply rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ10A | DO-214AA package, 600 W rating, 17.0 V clamping at 34.4 A, 1 mA IT | Higher power handling but larger footprint; requires PCB re-layout | Select when higher surge margin is needed and space allows SMB footprint |
| P6KE10A | DO-15 package, 600 W rating, 17.0 V clamping at 35.1 A, 1 mA IT | Same VWM/VC but lower thermal performance (RθJA = 125 °C/W vs. 100 °C/W) | Prefer for cost-sensitive non-automotive designs where thermal derating is acceptable |
Compared with SMBJ10A and P6KE10A, the BZW04-10B offers tighter DO-41 footprint compatibility, superior thermal resistance (60 °C/W junction-to-lead), and AEC-Q101 qualification path - making it optimal for space-constrained automotive modules requiring validated reliability.
Availability
BZW04-10B is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC input conditioning, and LED driver overvoltage clamping requiring stable component supply and traceable sourcing.
Supply support for BZW04-10B 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 for automotive, industrial, and consumer markets.
The BZW04 series is part of TSC's AEC-Q101-qualified transient suppression portfolio, engineered specifically for robust, high-energy clamping in 12 V/24 V automotive and industrial power systems.
FAQ
What is the maximum clamping voltage of the BZW04-10B under standard surge conditions?
The BZW04-10B clamps to a maximum of 16.7 V when subjected to a 10/1000 μs surge waveform at 24.0 A peak impulse current. This value is measured per IEC 61000-4-5 and defines the upper voltage limit imposed on protected circuitry during transient events. The BZW04-10B maintains this clamping performance across its full operating temperature range of –55 °C to +175 °C.
Is the BZW04-10B suitable for automotive applications?
Yes - the BZW04-10B is offered in an AEC-Q101-qualified variant (BZW04-10BH) that passes rigorous automotive stress tests including temperature cycling, high-temperature reverse bias, and ESD. Its 175 °C maximum junction temperature, low leakage, and DO-41 mechanical robustness make the BZW04-10B appropriate for engine control units, body electronics, and infotainment power rails.
How does the BZW04-10B differ from bidirectional versions like BZW04-10BB?
The BZW04-10B is unidirectional and features a cathode band for polarity-specific placement, while BZW04-10BB is bidirectional with symmetrical breakdown in both directions and no polarity marking. The BZW04-10B has lower leakage (<5 μA at 10.2 V) and is optimized for DC rail protection; BZW04-10BB suits AC-coupled or floating signal lines where polarity reversal may occur.
What is the thermal resistance profile of the BZW04-10B?
The BZW04-10B exhibits a junction-to-lead thermal resistance (RθJL) of 60 °C/W and a junction-to-ambient resistance (RθJA) of 100 °C/W when mounted on 10 mm leads per standard JEDEC test conditions. These values enable reliable operation up to 175 °C junction temperature and inform heatsinking decisions in high-power-density layouts.
Can the BZW04-10B replace older P6KE10A devices in existing designs?
The BZW04-10B is not a direct pin-compatible replacement for P6KE10A due to differing DO-41 vs. DO-15 footprints and thermal characteristics. While both share similar VWM (10.2 V vs. 10 V) and clamping (16.7 V vs. 17.0 V), the BZW04-10B offers better thermal resistance and AEC-Q101 qualification - but requires PCB layout revision for DO-41 mounting.
BZW04-10B 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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 24A
- 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)
BZW04-10B FAQ
1.How can I place an order for BZW04-10B through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-10B 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 BZW04-10B reliable?
The price and inventory of BZW04-10B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-10B is usually 5 days.
3.What payment methods are accepted for BZW04-10B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-10B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-10B?
BZW04-10B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-10B 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 BZW04-10B?
For technical support, including BZW04-10B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-10B requirements.
6.How does Aetrix verify that BZW04-10B is sourced from the original manufacturer or authorized distributors?
All BZW04-10B 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 BZW04-10B meets industry standards.
7.What is the process for return or replacement of BZW04-10B?
All BZW04-10B units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-10B, 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 BZW04-10B part is unused and in its original packaging.
Return procedure for BZW04-10B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-10B Tags
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