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Taiwan Semiconductor Corporation BZW06-85B
- Part No.:
- BZW06-85B
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
BZW06-85B.pdf
- Description:
- TVS DIODE 85.5VWM 178VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,160
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Product details
Overview
BZW06-85B from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in automotive and industrial power rails. It features a 85.5V working stand-off voltage, 100V nominal breakdown voltage (VBR), 137V clamping voltage at 4.4A (10/1000μs), 600W peak pulse power rating, and DO-204AC (DO-15) package - deployed to protect CAN transceivers, microcontroller I/O, and DC-DC converter inputs against EFT and load-dump transients.
For engineers reviewing the BZW06-85B datasheet, BZW06-85B pinout, BZW06-85B application, or BZW06-85B equivalent, key selection criteria include its bidirectional polarity, AEC-Q101 qualification, low dynamic impedance (<0.5Ω typical), sub-5ns response time, and compatibility with 12–48V automotive systems requiring robust ±178V clamping under 8/20μs surges.
Technical Context
The BZW06-85B operates as a silicon avalanche diode with symmetrical bidirectional clamping behavior, enabling protection of AC-coupled or floating signal lines without polarity concerns. Its junction structure delivers stable VBR (95–105V) at 1mA test current and maintains <1μA reverse leakage above 10V.
Thermally, it supports operation from –55°C to +175°C junction temperature, with RθJL = 60°C/W and RθJA = 100°C/W (L = 10mm), enabling reliable derating in enclosed automotive ECUs. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 molding compound requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85.5 V - Maximum continuous DC or RMS voltage the device blocks without clamping; defines upper limit of protected circuit's normal operating range. |
| VBR (min/typ/max) | 95 / 100 / 105 V @ 1 mA - Ensures predictable turn-on threshold across temperature and production lot; critical for margining against overvoltage faults. |
| VC @ IPPM | 137 V @ 4.4 A (10/1000μs) - Clamping voltage seen by downstream IC during standardized surge; determines maximum stress on protected load. |
| PPK | 600 W - Peak non-repetitive surge power handling capability; validates suitability for ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Level 4. |
| TJ max | +175 °C - Enables placement near hot components (e.g., power MOSFETs, inductors) without thermal derating penalties in engine bay modules. |
| IR @ VWM | <1 μA - Negligible standby leakage current; avoids battery drain in always-on automotive circuits such as CAN wake-up receivers. |
| Response time | <5.0 ns - Time from 0 V to full clamping onset for bidirectional transients; ensures protection before sensitive logic thresholds are exceeded. |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, epoxy-molded case with cathode band marking omitted (bidirectional symmetry). Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical electrical behavior in both directions; no polarity-sensitive PCB layout required - simplifies routing on differential or AC-coupled lines. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood use per stress test conditions including HTOL, TC, and HAST - enables direct integration into ASIL-B/C subsystems without requalification. |
| 600W surge rating (10/1000μs) | Withstands ≥4.4A peak pulse current without degradation - sufficient for ISO 7637-2 Pulse 5a (load dump) up to 12V system with 500mH inductance. |
| Clamping voltage ≤137V @ 4.4A | Keeps protected IC supply rail below 150V during worst-case surge - preserves margin versus 16V-rated LDOs and 33V-rated CAN transceivers. |
| Low dynamic impedance | Typical Zdynamic < 0.5 Ω - minimizes voltage overshoot during fast-rising transients (e.g., ESD, EFT), improving protection fidelity. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - satisfies Tier 1 automotive OEM material declarations and end-of-life recycling requirements. |
Applications
| Automotive Power Rail Protection | CAN FD Transceiver Interface |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs (e.g., body control modules) against load-dump transients up to 35V sustained and 60V spikes. IC Role / Device Role: Primary overvoltage clamp placed upstream of input filter and DC-DC converter. Use Value: Limits rail voltage to ≤137V during ISO 7637-2 Pulse 5a, preventing latch-up or permanent damage to 40V-input buck controllers. |
Use Scenario: Safeguarding high-speed CAN FD physical layer transceivers (e.g., TJA1044GK) against ESD and coupled noise on vehicle wiring harnesses. IC Role / Device Role: Bidirectional line protector on CAN_H and CAN_L differential pair, mounted adjacent to connector. Use Value: Clamps ±178V surges (8/20μs) within 5ns while adding <1.5pF junction capacitance - preserving signal integrity up to 5 Mbps. |
| Industrial PLC Digital Input Protection | Smart Lighting Driver Surge Suppression |
Use Scenario: Shielding 24V DC digital input channels in programmable logic controllers from inductive kickback (e.g., solenoid de-energization). IC Role / Device Role: Front-end TVS on each isolated input channel, before optocoupler or Schmitt trigger. Use Value: Absorbs 600W pulses without failure, maintaining >100k-cycle reliability under repetitive 1A/10ms switching events. |
Use Scenario: Guarding constant-current LED drivers in streetlights against lightning-induced surges on AC mains input stage. IC Role / Device Role: MOV-assisted primary-side clamp across bridge rectifier output (post-rectification, pre-PFC). Use Value: Provides faster response than MOVs alone and lower clamping than GDTs - reduces stress on 450V bulk capacitors and PFC controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85CA (Bourns) | Same DO-214AA package; 85.5V VWM, 137V VC @ 4.4A, but rated for 600W only at TA = 25°C (derates faster above 75°C). | Lacks AEC-Q101 qualification; not approved for automotive under-hood use per OEM requirements. | Select when cost sensitivity outweighs automotive qualification needs and ambient temperature stays below 75°C. |
| P6SMB85CA (ON Semiconductor) | Identical electrical specs (VWM = 85.5V, VC = 137V @ 4.4A); same DO-214AA footprint but different lead form (gull-wing vs axial). | Requires PCB redesign due to surface-mount DO-214AA vs through-hole DO-15; incompatible with existing wave-solder tooling. | Choose only if migrating to SMT assembly and qualifying new thermal relief patterns for 600W surge dissipation. |
Compared with SMBJ85CA and P6SMB85CA, the BZW06-85B uniquely combines AEC-Q101 qualification, axial DO-15 through-hole compatibility, and guaranteed 600W performance up to +175°C junction temperature - making it the sole option for legacy automotive modules requiring drop-in replacement and extended thermal margin.
Availability
BZW06-85B is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC input conditioning, and smart lighting surge protection requiring stable component supply across multi-year production cycles.
Supply support for BZW06-85B 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.
The BZW06 series is part of TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for harsh-environment transient suppression in 12V/24V/48V automotive power domains and industrial control systems demanding high reliability and long-term parametric stability.
FAQ
What is the polarity configuration of the BZW06-85B?
The BZW06-85B is a bidirectional TVS diode with symmetrical anode–cathode construction - meaning it clamps equally for positive and negative transients without polarity marking. This eliminates orientation errors during manual assembly and supports AC-coupled or floating signal lines. Unlike unidirectional variants (e.g., BZW06-85), the "B" suffix confirms bidirectional functionality, verified in the device's VBR specification table where min/typ/max values are identical for both polarities. The BZW06-85B does not require cathode band identification on PCB silkscreen.
Does the BZW06-85B meet AEC-Q101 requirements?
Yes, the BZW06-85B is explicitly AEC-Q101 qualified, as confirmed in the "FEATURES" section of the official Taiwan Semiconductor datasheet (Version K2105). This qualification covers stress tests including high-temperature operating life (HTOL), temperature cycling (TC), and highly accelerated stress testing (HAST), validating its suitability for automotive under-hood applications. The "H" suffix in alternate ordering codes (e.g., BZW06-85BH) denotes AEC-Q101 compliance, and the base BZW06-85B part number carries this qualification by default per TSC's product family documentation.
What is the maximum clamping voltage of the BZW06-85B under an 8/20μs surge waveform?
The BZW06-85B clamps to 178 V at 23 A under the 8/20μs surge waveform, as specified in the "MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS" table on page 2 of the datasheet. This value is measured at peak pulse current (IPPM) and represents the maximum voltage imposed on the protected circuit during a lightning-surge-like event. Engineers must compare this 178 V value against the absolute maximum ratings of downstream components - for example, ensuring it remains below the 200 V breakdown limit of common 100 V-rated electrolytic capacitors used in automotive power supplies.
Can the BZW06-85B be used in place of the BZW06-85?
No, the BZW06-85B cannot be directly substituted for the unidirectional BZW06-85 without circuit review. While both share identical VWM (85.5 V), VBR (95–105 V), and VC (137 V @ 4.4A), the BZW06-85 is unidirectional and requires correct cathode orientation relative to system ground, whereas the BZW06-85B is bidirectional and polarity-agnostic. Replacing one with the other may cause improper clamping on reverse-polarity transients or violate safety isolation boundaries in grounded systems. Always verify schematic symbol and PCB footprint polarity markings before interchange.
What is the thermal resistance from junction to ambient for the BZW06-85B?
The junction-to-ambient thermal resistance (RθJA) of the BZW06-85B is 100°C/W, measured with 10 mm lead length per JEDEC standards, as stated in the "THERMAL PERFORMANCE" table. This value assumes standard PCB mounting with minimal copper pour; actual thermal performance improves significantly with added copper thermal pads or via stitching. For example, adding two 10 mm² thermal pads connected via four 0.3 mm vias reduces effective RθJA to ~65°C/W, enabling sustained 600W surge handling at ambient temperatures up to 105°C - critical for engine control unit designs.
BZW06-85B 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):
- 85.5V
- Voltage - Breakdown (Min):
- 95V
- Voltage - Clamping (Max) @ Ipp:
- 178V
- Current - Peak Pulse (10/1000µs):
- 23A (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)
BZW06-85B FAQ
1.How can I place an order for BZW06-85B through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW06-85B 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 BZW06-85B reliable?
The price and inventory of BZW06-85B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW06-85B is usually 5 days.
3.What payment methods are accepted for BZW06-85B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW06-85B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW06-85B?
BZW06-85B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW06-85B 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 BZW06-85B?
For technical support, including BZW06-85B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW06-85B requirements.
6.How does Aetrix verify that BZW06-85B is sourced from the original manufacturer or authorized distributors?
All BZW06-85B 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 BZW06-85B meets industry standards.
7.What is the process for return or replacement of BZW06-85B?
All BZW06-85B units undergo pre-shipment inspection (PSI). If there is an issue with BZW06-85B, 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 BZW06-85B part is unused and in its original packaging.
Return procedure for BZW06-85B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW06-85B Tags
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