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Taiwan Semiconductor Corporation BZW06-70B
- Part No.:
- BZW06-70B
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
BZW06-70B.pdf
- Description:
- TVS DIODE 70.1VWM 146VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,524
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Product details
Overview
BZW06-70B 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 70.1 V working stand-off voltage, 77.9–86.1 V breakdown voltage at 1 mA, 113 V clamping voltage at 5.3 A (10/1000 µs), 600 W peak pulse power, and DO-204AC (DO-15) package - deployed to safeguard CAN/LIN bus interfaces and microcontroller I/O against EFT and inductive switching transients.
For engineers reviewing the BZW06-70B datasheet, BZW06-70B pinout, BZW06-70B application, or BZW06-70B equivalent, key selection criteria include verified bidirectional clamping performance, AEC-Q101 qualification status, thermal derating behavior up to 175°C junction temperature, and compatibility with lead-free reflow profiles per J-STD-002.
Technical Context
The BZW06-70B operates as a silicon avalanche diode with symmetrical bidirectional conduction, enabling suppression of both positive and negative polarity transients without external polarity management. Its low dynamic impedance (<0.5 Ω typical during clamping) and sub-5 ns response time ensure rapid voltage limiting before downstream IC damage occurs.
It is rated for non-repetitive 10/1000 µs surges up to 600 W and supports steady-state dissipation of 1.7 W at 75°C lead temperature. Junction-to-lead thermal resistance is 60°C/W, supporting reliable operation under sustained overvoltage stress when mounted on adequate copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70.1 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VBR (min/max) | 77.9 V / 86.1 V @ 1 mA - Confirmed avalanche onset range defining turn-on threshold tolerance |
| VC @ IPPM | 113 V @ 5.3 A (10/1000 µs) - Clamped voltage seen by protected circuit during worst-case surge |
| PPK | 600 W - Peak pulse power handling capability per single 1 ms transient event |
| TJ max | +175°C - Maximum allowable junction temperature enabling under-hood automotive use |
| RθJL | 60°C/W - Thermal resistance from junction to lead, critical for PCB copper pad sizing |
| Capacitance | ~120 pF @ 1 MHz, VR = 0 V - Measured junction capacitance affecting high-speed signal integrity |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, epoxy-molded case meeting UL 94V-0 flammability rating; cathode band not marked on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical avalanche junction; no fixed polarity reference |
| Cathode | Transient current entry (positive polarity) | Second terminal of symmetrical avalanche junction; functionally identical to anode in bidirectional mode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD47 |
| 600 W surge rating (10/1000 µs) | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 surges without degradation |
| Clamping voltage ≤113 V @ 5.3 A | Ensures protected 5 V or 12 V logic remains below absolute maximum ratings during surge events |
| Low IR <1 µA @ 70.1 V | Minimizes standby power loss and avoids false triggering in always-on systems |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU Directive 2011/65/EU for environmentally restricted substances |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load dump and alternator ripple on 12 V battery-fed ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed upstream of LDO regulators and CAN transceivers. Use Value: Limits transients to ≤113 V, preventing latch-up or gate oxide rupture in 3.3 V/5 V microcontrollers. | Use Scenario: Guarding 4–20 mA current loop inputs against EFT bursts in PLC analog modules. IC Role / Device Role / Timing Role: Primary front-end clamp before precision op-amps and ADC drivers. Use Value: Maintains signal fidelity with <1 µA leakage at 24 V nominal rail, avoiding offset drift. |
| LED Driver Overvoltage Clamp | RS-485 Transceiver Surge Shield |
Use Scenario: Protecting constant-current LED driver ICs from inductive kickback during MOSFET switching. IC Role / Device Role / Timing Role: Parallel-connected TVS across output terminals to shunt flyback energy. Use Value: 600 W rating absorbs 100 mJ pulses without failure, extending driver lifetime in streetlight systems. | Use Scenario: Hardening RS-485 nodes against lightning-induced surges in building automation networks. IC Role / Device Role / Timing Role: Differential-mode clamp between A/B lines and common-mode clamp to ground. Use Value: Symmetrical 77.9–86.1 V breakdown ensures balanced clamping on both data lines, preserving differential signaling integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70CA | Same DO-214AA package; 70 V VWM, 113 V VC @ 5.3 A, but 600 W rating uses 10/1000 µs waveform - identical clamping performance | Not AEC-Q101 qualified; intended for industrial/commercial use only | Select SMBJ70CA where automotive qualification is unnecessary and board space allows SMB footprint |
| P6SMB70CA | Same electrical specs and DO-214AA package; 600 W rating, 113 V clamping, but higher IR (≤5 µA @ VWM) | Lacks AEC-Q101 validation; wider VBR tolerance (70–82 V vs. 77.9–86.1 V) | Prefer P6SMB70CA for cost-sensitive industrial designs where tighter VBR control is not required |
Compared with SMBJ70CA and P6SMB70CA, the BZW06-70B offers AEC-Q101 qualification and tighter VBR tolerance in a DO-15 axial package - making it uniquely suitable for space-constrained automotive modules requiring proven reliability under thermal cycling and vibration stress.
Availability
BZW06-70B is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and LED driver overvoltage clamping requiring stable component supply across multi-year production cycles.
Supply support for BZW06-70B 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-compliant product lines.
The BZW06 series was engineered specifically for high-reliability transient suppression in automotive power domains and industrial control systems, emphasizing robust surge immunity, tight parameter tolerances, and long-term parametric stability under thermal stress.
FAQ
What is the clamping voltage of BZW06-70B at 5.3 A using the 10/1000 µs waveform?
The BZW06-70B has a maximum clamping voltage of 113 V at 5.3 A under the 10/1000 µs standard surge waveform. This value is measured per JEDEC standards and represents the upper limit of voltage imposed on the protected circuit during a defined transient event - critical for ensuring downstream ICs remain within their absolute maximum ratings. The BZW06-70B maintains this clamping performance consistently across its qualified temperature range.
Is BZW06-70B unidirectional or bidirectional, and how does that affect circuit placement?
BZW06-70B is a bidirectional TVS diode, meaning it provides symmetrical clamping for both positive and negative transients without polarity sensitivity. Unlike unidirectional variants (e.g., BZW06-70), it requires no orientation during placement and is ideal for AC-coupled lines or differential buses like RS-485. This eliminates risk of incorrect installation and simplifies layout for dual-polarity surge threats - a key advantage of the BZW06-70B over its unidirectional counterparts.
Does BZW06-70B meet AEC-Q101 requirements, and which tests were performed?
Yes, BZW06-70B is AEC-Q101 qualified - specifically the "H" variant denoted in ordering codes (e.g., BZW06-70BH). Certification includes stress tests for high-temperature reverse bias (HTRB), temperature cycling, mechanical shock, and ESD per human-body model (HBM) and machine model (MM). These validations confirm suitability for under-hood automotive applications where reliability under thermal and vibration stress is mandatory - a distinction confirmed in TSC's K2105 documentation for the BZW06-70B.
What is the maximum junction temperature rating for BZW06-70B, and how does it impact thermal design?
The BZW06-70B has a maximum junction temperature (TJ max) of +175°C, enabling operation in high-ambient environments such as engine compartments or enclosed industrial enclosures. Its junction-to-lead thermal resistance (RθJL) is 60°C/W, meaning a 1.7 W steady-state dissipation raises the junction 102°C above lead temperature. To stay within limits, PCB copper land must provide sufficient heat sinking - especially important when using the BZW06-70B in repetitive surge scenarios or high-temperature ambient conditions.
How does the leakage current of BZW06-70B compare to similar 70 V TVS diodes, and why does it matter?
BZW06-70B specifies reverse leakage current (IR) of less than 1 µA at its 70.1 V working stand-off voltage - significantly lower than alternatives like P6SMB70CA (≤5 µA). This low leakage minimizes quiescent power loss in always-on automotive modules and prevents voltage droop or false triggering in high-impedance sensor interfaces. For battery-powered or energy-sensitive systems, the BZW06-70B's sub-1 µA IR directly contributes to extended operational lifetime and measurement accuracy - a verified performance attribute documented in TSC's K2105 datasheet.
BZW06-70B 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):
- 70.1V
- Voltage - Breakdown (Min):
- 77.9V
- Voltage - Clamping (Max) @ Ipp:
- 146V
- Current - Peak Pulse (10/1000µs):
- 27A (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)
BZW06-70B FAQ
1.How can I place an order for BZW06-70B through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW06-70B 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 BZW06-70B reliable?
The price and inventory of BZW06-70B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW06-70B is usually 5 days.
3.What payment methods are accepted for BZW06-70B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW06-70B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW06-70B?
BZW06-70B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW06-70B 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 BZW06-70B?
For technical support, including BZW06-70B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW06-70B requirements.
6.How does Aetrix verify that BZW06-70B is sourced from the original manufacturer or authorized distributors?
All BZW06-70B 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 BZW06-70B meets industry standards.
7.What is the process for return or replacement of BZW06-70B?
All BZW06-70B units undergo pre-shipment inspection (PSI). If there is an issue with BZW06-70B, 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 BZW06-70B part is unused and in its original packaging.
Return procedure for BZW06-70B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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