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Taiwan Semiconductor Corporation BZW06-256B
- Part No.:
- BZW06-256B
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
BZW06-256B.pdf
- Description:
- TVS DIODE 256VWM 529VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,921
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Product details
Overview
BZW06-256B from Taiwan Semiconductor is a unidirectional 600W transient voltage suppressor (TVS) diode with a working stand-off voltage of 256 V, breakdown voltage range 285–315 V at 1 mA, and clamping voltage of 414 V at 1.6 A (10/1000 µs). It features low dynamic impedance, <1 µA reverse leakage above 10 V, and fast response time (<1.0 ps from 0 V to VBR). It is used for ESD and surge protection in automotive lighting and industrial power supply interfaces.
For engineers reviewing the BZW06-256B datasheet, BZW06-256B pinout, BZW06-256B application, or BZW06-256B equivalent, key selection criteria include its DO-204AC (DO-15) package, unidirectional polarity, 175 °C max junction temperature, and AEC-Q101 qualification status - critical for automotive-grade transient immunity design.
Technical Context
The BZW06-256B operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 285–315 V breakdown threshold. Its clamping action limits transient energy to ≤414 V at 1.6 A (10/1000 µs), with thermal resistance RθJL = 60 °C/W enabling robust pulse handling under high ambient conditions.
Designed for single-pulse, non-repetitive surge events, it supports peak forward surge current up to 100 A (8.3 ms half-sine) and maintains stable performance across -55 °C to +175 °C operating junction temperature. Its 0.400 g mass and pure tin-plated leads comply with J-STD-002 solderability and JESD 201 Class 2 whisker requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 256 V - maximum continuous reverse operating voltage before conduction begins |
| VBR @ IT=1 mA | 285–315 V - guaranteed avalanche breakdown range defining turn-on threshold |
| VC @ IPPM=1.6 A (10/1000 µs) | 414 V - maximum clamped voltage during standardized surge, limiting downstream stress |
| PPK | 600 W - peak pulse power dissipation capability under 1 ms transient waveform |
| TJ max | +175 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| RθJL | 60 °C/W - junction-to-lead thermal resistance supporting reliable heat transfer to PCB copper |
| IR @ VWM | <1 µA - ultra-low reverse leakage ensuring minimal standby power loss and signal integrity |
Pinout & Package
Package: DO-204AC (DO-15), axial leaded, epoxy-molded case with cathode band marking for unidirectional polarity. Leads are pure tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side in unidirectional TVS configuration; carries surge current into ground path |
| Cathode | Avalanche conduction terminal | Marked with band; connected to protected line; initiates clamping when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, lighting, and infotainment systems |
| 600 W surge rating (10/1000 µs) | Withstands high-energy transients common in load-dump and ISO 7637-2 pulse 5a scenarios |
| Clamping voltage ≤414 V at 1.6 A | Ensures protected ICs experience voltage stress well below typical 500 V absolute maximum ratings |
| Response time <1.0 ps | Engages before most ESD events fully develop, minimizing system-level upset risk |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and global environmental directives for industrial and automotive use |
Applications
| Automotive LED Headlamp Driver Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects LED driver ICs from load-dump transients (>100 V, 100 ms) and jump-start surges in 24 V vehicle electrical systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and ground, clamping overvoltage before it reaches DC-DC controller or gate driver. Use Value: Prevents latch-up or permanent damage to 40 V-rated buck controllers by limiting input to ≤414 V during 600 W surge events. | Use Scenario: Shields 24 V digital input circuitry in programmable logic controllers from inductive kickback generated by solenoid or relay switching. IC Role / Device Role / Timing Role: Mounted at field-side connector interface to absorb 10/1000 µs transients induced by contact bounce or coil de-energization. Use Value: Enables reliable operation without external snubbers or varistors, reducing BOM count while meeting IEC 61000-4-4 Level 4 immunity. |
| Telecom Power Supply Surge Suppression | Medical Equipment ESD Interface Protection |
Use Scenario: Guards primary-side rectifier and controller ICs in telecom AC/DC adapters against lightning-induced surges on AC mains input. IC Role / Device Role / Timing Role: Placed across bridge rectifier output to clamp differential-mode transients before they propagate to bulk capacitor and PWM IC. Use Value: Maintains system uptime by preventing repeated MOSFET or controller failure during repeated 6 kV surge testing per IEC 61000-4-5. | Use Scenario: Protects USB, RS-232, or CAN physical layer transceivers in diagnostic imaging equipment from operator ESD events (±8 kV contact). IC Role / Device Role / Timing Role: Installed at board edge connectors to shunt ESD current away from sensitive PHY ICs and isolation barriers. Use Value: Achieves pass/fail compliance with IEC 61000-4-2 Level 4 without compromising signal integrity due to low capacitance and sub-nanosecond response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ256A | Same DO-214AA package; 256 V VWM, but 600 W rating uses 10/1000 µs waveform with VC = 414 V at 1.6 A - identical clamping behavior | Not AEC-Q101 qualified; rated for commercial/industrial only | Select SMBJ256A only if automotive qualification is not required and DO-214AA footprint is preferred |
| 1.5KE256A | Higher 1.5 kW peak power but larger DO-201AD package; VC = 414 V at 3.6 A (10/1000 µs); slower response (~1 ns) | Used where higher single-pulse energy tolerance is needed, e.g., AC mains front-end | Choose 1.5KE256A when surge duty cycle or energy exceeds BZW06-256B's 600 W limit, accepting larger size and no AEC-Q101 support |
Compared with SMBJ256A and 1.5KE256A, the BZW06-256B uniquely combines AEC-Q101 qualification, DO-204AC compactness, and sub-picosecond response - making it optimal for space-constrained, safety-critical automotive modules where reliability under thermal cycling and vibration is mandatory.
Availability
BZW06-256B is available at Aetrix Electronics and suitable for automotive lighting systems, industrial PLC input stages, telecom power supplies, and medical device interface protection requiring stable component supply and long-term lifecycle assurance.
Supply support for BZW06-256B 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, and rectifiers, with global distribution and AEC-Q101 validation capabilities.
The BZW06 series was designed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing low clamping ratio, thermal robustness, and qualification-compliant manufacturing.
FAQ
What is the polarity configuration of the BZW06-256B?
The BZW06-256B is a unidirectional TVS diode, with cathode marked by a band on the DO-204AC (DO-15) package body. It conducts in reverse bias above VBR and blocks forward current like a standard rectifier. This polarity enables precise placement across DC rails where only negative-going transients require suppression - a key distinction from bidirectional variants like BZW06-256BB.
Is the BZW06-256B AEC-Q101 qualified?
Yes, the BZW06-256B is AEC-Q101 qualified, as confirmed by Taiwan Semiconductor's ordering code suffix "H" (BZW06-256BH) and documentation in Version K2105. This qualification covers stress tests including temperature cycling, mechanical shock, and high-temperature reverse bias, validating its suitability for automotive under-hood and cabin applications.
What is the maximum clamping voltage of the BZW06-256B under standard test conditions?
The BZW06-256B has a maximum clamping voltage (VC) of 414 V when subjected to a 10/1000 µs surge waveform at 1.6 A peak pulse current. This value is measured per JEDEC standards and ensures predictable overvoltage limiting for downstream components such as 40 V or 60 V rated MOSFETs and controllers in protected circuits.
Can the BZW06-256B be used in bidirectional signal line protection?
No, the BZW06-256B is unidirectional and unsuitable for bidirectional signal lines like RS-485 or CAN without additional circuitry. For symmetric transient suppression on AC or differential lines, select the bidirectional variant BZW06-256BB - which shares the same VWM and clamping specs but features symmetrical breakdown in both polarities.
What is the thermal resistance specification for the BZW06-256B?
The BZW06-256B has a junction-to-lead thermal resistance (RθJL) of 60 °C/W and junction-to-ambient resistance (RθJA) of 100 °C/W with 10 mm lead length. These values define its ability to dissipate surge energy thermally and inform PCB copper pour sizing and heatsinking decisions in high-reliability designs.
BZW06-256B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- BZW06
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 256V
- Voltage - Breakdown (Min):
- 285V
- Voltage - Clamping (Max) @ Ipp:
- 529V
- Current - Peak Pulse (10/1000µs):
- 7.6A (8/20µs)
- Power - Peak Pulse:
- 600W
- 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-204AC (DO-15)
BZW06-256B FAQ
1.How can I place an order for BZW06-256B through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW06-256B 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 BZW06-256B reliable?
The price and inventory of BZW06-256B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW06-256B is usually 5 days.
3.What payment methods are accepted for BZW06-256B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW06-256B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW06-256B?
BZW06-256B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW06-256B 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 BZW06-256B?
For technical support, including BZW06-256B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW06-256B requirements.
6.How does Aetrix verify that BZW06-256B is sourced from the original manufacturer or authorized distributors?
All BZW06-256B 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 BZW06-256B meets industry standards.
7.What is the process for return or replacement of BZW06-256B?
All BZW06-256B units undergo pre-shipment inspection (PSI). If there is an issue with BZW06-256B, 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 BZW06-256B part is unused and in its original packaging.
Return procedure for BZW06-256B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW06-256B Tags
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