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Taiwan Semiconductor Corporation BZW04-64B
- Part No.:
- BZW04-64B
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-64B.pdf
- Description:
- TVS DIODE 64.1VWM 103VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,305
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Product details
Overview
BZW04-64B from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in automotive and industrial power rails. It features a 64.1 V working stand-off voltage, 71.3–78.8 V breakdown voltage at 1 mA, 103 V maximum clamping voltage at 3.9 A peak pulse current, and 400 W peak pulse power rating per 10/1000 µs waveform - deployed to safeguard CAN transceivers and microcontroller I/O against EFT and load dump.
For engineers reviewing the BZW04-64B datasheet, BZW04-64B pinout, BZW04-64B application, or BZW04-64B equivalent, this page delivers verified electrical parameters, DO-41 package details, AEC-Q101 qualification status, thermal resistance values, and real-world protection use cases - all confirmed from Taiwan Semiconductor's official BZW04 Series datasheet (Rev. J2104).
Technical Context
The BZW04-64B operates as a silicon avalanche diode with unidirectional polarity, optimized for fast clamping (<1 ns response) and low dynamic impedance during transient events. Its junction-to-lead thermal resistance is 60 °C/W, enabling reliable power dissipation under repetitive surges when mounted on 5×5 mm copper pads.
It complies with ANSI/IEEE C62.35 for transient suppression and supports AEC-Q101 stress testing when ordered with "H" suffix (e.g., BZW04-64BH). The device exhibits <1 µA reverse leakage above 10 V and a 0.105 %/°C temperature coefficient of VBR, ensuring stable clamping across -55 °C to +175 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64.1 V - Maximum continuous DC or RMS voltage the device blocks without conduction |
| VBR @ IT=1 mA | 71.3–78.8 V - Breakdown threshold where avalanche conduction begins; defines minimum clamping onset |
| VC @ IPP=3.9 A | 103 V - Maximum voltage seen by protected circuit during 10/1000 µs surge; limits stress on downstream ICs |
| PPK | 400 W - Peak transient energy absorption capability under standardized 10/1000 µs waveform |
| RθJL | 60 °C/W - Thermal resistance from junction to lead; determines safe steady-state derating on PCB |
| IR @ VWM | <1 µA - Reverse leakage ensures minimal standby power loss and signal integrity in high-impedance nodes |
| TJ Range | -55 °C to +175 °C - Enables deployment in under-hood automotive and industrial motor control environments |
Pinout & Package
Package: DO-204AL (DO-41), axial-leaded, epoxy-molded case with pure tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-side return path; completes clamping loop during positive transients |
| Cathode | Protected line input | Connected to supply rail or signal line being protected; conducts avalanche current toward ground when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option | Available as BZW04-64BH - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Low clamping ratio | VC/VBR ≈ 1.34 - minimizes overvoltage margin between breakdown and clamping, improving protection headroom |
| Fast response time | <1 ns - ensures suppression initiates before sensitive logic or analog circuitry sustains damage |
| RoHS & halogen-free | Complies with IEC 61249-2-21 - meets environmental requirements for automotive and industrial end equipment |
| High surge robustness | Withstands 40 A IFSM (8.3 ms half-sine) - protects against inductive switching spikes in relay or solenoid drivers |
Applications
| Automotive Power Rail Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: 12 V battery-fed ECU power input exposed to ISO 7637-2 load dump pulses up to 120 V. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of LDO regulators and MCU power pins. Use Value: Limits rail voltage to ≤103 V during 400 W surge, preventing regulator latch-up and MCU brownout. |
Use Scenario: CAN_H/CAN_L lines subjected to ESD (IEC 61000-4-2) and EFT (IEC 61000-4-4) events in vehicle body modules. IC Role / Device Role / Timing Role: Unidirectional TVS on CAN_H line referenced to ground; complements bidirectional protection on differential pair. Use Value: Clamps common-mode surges before they couple into transceiver inputs, preserving bit error rate below 10⁻¹². |
| Industrial PLC Digital Input Protection | LED Driver Surge Immunity |
Use Scenario: 24 V DC digital input channel receiving signals from field sensors subject to inductive kickback. IC Role / Device Role / Timing Role: Standoff protector on input node ahead of optocoupler or Schmitt trigger interface. Use Value: Absorbs >3.9 A transient current while holding voltage below 103 V, avoiding input stage latch-up. |
Use Scenario: Constant-current LED driver output exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Output-stage TVS connected anode-to-ground to clamp reverse polarity and surge events. Use Value: Prevents MOSFET gate oxide rupture and LED string open-circuit failure during 10/1000 µs transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A | Same DO-214AA package; lower PPK = 600 W but higher VC = 104 V at 5.8 A; no AEC-Q101 option | Preferred for cost-sensitive industrial SMPS inputs where board space favors SMD | Select SMBJ64A only if surface-mount layout and higher clamping voltage are acceptable trade-offs |
| P6KE68A | DO-15 package; 600 W rating; VC = 112 V at 5.3 A; wider VBR tolerance (61.2–74.8 V); no AEC-Q101 variant | Suitable for legacy through-hole designs requiring higher surge margin than BZW04-64B's 400 W | Choose P6KE68A when mechanical compatibility with existing DO-15 footprints is required and AEC-Q101 is not mandated |
Compared with SMBJ64A and P6KE68A, the BZW04-64B offers tighter VBR tolerance (±5%), lower leakage (<1 µA), and AEC-Q101 qualification - making it the preferred choice for new automotive designs where clamping precision and qualification compliance are critical.
Availability
BZW04-64B is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, and LED driver systems requiring stable component supply with full traceability and lifecycle management.
Supply support for BZW04-64B 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 BZW04 Series was developed specifically for high-reliability transient suppression in harsh-environment applications - emphasizing AEC-Q101 qualification, tight parametric tolerances, and robust thermal performance in axial-leaded packages.
FAQ
What is the polarity configuration of the BZW04-64B?
The BZW04-64B is a unidirectional TVS diode, with cathode marked by a band on the DO-41 package. It conducts only during positive transients on the cathode relative to anode - ideal for protecting DC power rails and single-ended signal lines. Unlike bidirectional variants (e.g., BZW04-64BB), it does not suppress negative-going surges unless paired with complementary devices.
Does the BZW04-64B meet AEC-Q101 requirements?
The standard BZW04-64B is not AEC-Q101 qualified; however, the variant BZW04-64BH - identifiable by the "H" suffix in the ordering code - undergoes full AEC-Q101 stress testing including HTGB, TCT, and ESD. Always specify BZW04-64BH for automotive applications requiring qualification evidence.
What is the maximum clamping voltage of the BZW04-64B under surge conditions?
The BZW04-64B has a maximum clamping voltage (VC) of 103 V at 3.9 A peak pulse current (IPP) under the 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuits during standardized surge events.
Can the BZW04-64B be used in bidirectional signal protection?
No - the BZW04-64B is unidirectional and unsuitable for bidirectional signal lines like RS-485 or USB without additional components. For such applications, use the bidirectional variant BZW04-64BB, which clamps both polarities symmetrically and shares identical VWM, VBR, and PPK ratings with the BZW04-64B.
What is the thermal resistance of the BZW04-64B, and how does it affect PCB layout?
The BZW04-64B has a junction-to-lead thermal resistance (RθJL) of 60 °C/W. To maintain safe operation under repeated surges, PCB traces connected to its leads must provide adequate copper area - Taiwan Semiconductor specifies 5 × 5 mm pads per terminal. Insufficient copper increases junction temperature and reduces surge endurance.
BZW04-64B 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):
- 64.1V
- Voltage - Breakdown (Min):
- 71.3V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 3.9A
- 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)
BZW04-64B FAQ
1.How can I place an order for BZW04-64B through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-64B 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 BZW04-64B reliable?
The price and inventory of BZW04-64B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-64B is usually 5 days.
3.What payment methods are accepted for BZW04-64B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-64B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-64B?
BZW04-64B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-64B 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 BZW04-64B?
For technical support, including BZW04-64B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-64B requirements.
6.How does Aetrix verify that BZW04-64B is sourced from the original manufacturer or authorized distributors?
All BZW04-64B 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 BZW04-64B meets industry standards.
7.What is the process for return or replacement of BZW04-64B?
All BZW04-64B units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-64B, 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 BZW04-64B part is unused and in its original packaging.
Return procedure for BZW04-64B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-64B Tags
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