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Taiwan Semiconductor Corporation BZW04-11
- Part No.:
- BZW04-11
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-11.pdf
- Description:
- TVS DIODE 11.1VWM 18.2VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,123
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Product details
Overview
BZW04-11 from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power rails and signal lines. It features a 11.1 V working stand-off voltage (VWM), 12.4–13.7 V breakdown voltage (VBR) at 1 mA, 18.2 V maximum clamping voltage (VC) at 22.0 A peak pulse current, and 400 W peak pulse power rating per 10/1000 μs waveform - deployed in automotive lighting control, industrial sensor interfaces, and ESD-sensitive microcontroller I/O protection.
For engineers reviewing the BZW04-11 datasheet, BZW04-11 pinout, BZW04-11 application, or BZW04-11 equivalent, key selection criteria include clamping performance under 22 A surge, thermal resistance (RθJA = 100 °C/W), unidirectional polarity marking, DO-41 package compatibility with through-hole PCB layouts, and AEC-Q101 qualification availability in B-suffix variants.
Technical Context
The BZW04-11 operates as a silicon avalanche diode optimized for fast-response transient suppression. Its junction exhibits low dynamic impedance during surge events, enabling stable clamping at 18.2 V while limiting energy dissipation to safe levels for downstream ICs. The device complies with ANSI/IEEE C62.35 for peak impulse current testing and maintains <5 μA reverse leakage at rated VWM.
Thermal design relies on its DO-41 package's 60 °C/W junction-to-lead (RθJL) and 100 °C/W junction-to-ambient (RθJA) ratings. Operation is specified across –55 °C to +175 °C junction temperature, supporting under-hood automotive and industrial environments where sustained thermal stress occurs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11.1 V - Maximum continuous DC or RMS voltage the device blocks without conduction. |
| VBR @ IT=1 mA | 12.4–13.7 V - Voltage at which avalanche breakdown begins; defines minimum trigger threshold for surge clamping. |
| VC @ IPP=22.0 A | 18.2 V - Maximum voltage seen by protected circuit during 10/1000 μs surge; determines safe operating margin for downstream ICs. |
| PPK | 400 W - Peak pulse power handling capability per standard 10/1000 μs waveform; validates robustness against lightning-induced transients. |
| ID @ VWM | ≤5 μA - Reverse leakage current at stand-off voltage; ensures minimal standby power loss and signal integrity in high-impedance circuits. |
| TJ max | +175 °C - Maximum junction temperature; enables use in high-ambient environments like engine control units and motor drives. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard PCB; informs heatsinking requirements for repeated surge duty cycles. |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded case with cathode band marking for unidirectional polarity. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-potential node; completes conduction path during reverse-biased surge event. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12 V rail); avalanche conduction initiates here when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Validated per 10/1000 μs waveform - protects against ISO 7637-2 Pulse 1/2a/5a surges in automotive 12 V systems. |
| Clamping voltage ≤18.2 V at 22 A | Ensures protected ICs (e.g., CAN transceivers, MCU GPIOs) remain below absolute maximum ratings during surge events. |
| Reverse leakage ≤5 μA at 11.1 V | Minimizes quiescent current draw in battery-powered or always-on circuits without compromising protection integrity. |
| AEC-Q101 qualified option (B-suffix) | Validated for automotive-grade reliability including temperature cycling, humidity bias HAST, and mechanical shock testing. |
| DO-41 mechanical compatibility | Enables drop-in replacement in legacy designs using industry-standard axial-leaded TVS footprints and assembly processes. |
Applications
| Automotive Lighting Control | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting LED driver ICs and MOSFET gate drivers from load-dump transients in headlamp and tail lamp modules. IC Role / Device Role: Unidirectional TVS placed between 12 V supply rail and ground, clamping spikes up to 120 V. Use Value: Prevents latch-up or permanent damage to driver ICs during alternator load dump events (ISO 7637-2 Pulse 5a), extending module lifetime. |
Use Scenario: Shielding 4–20 mA current-loop transmitter outputs from ESD and inductive kickback in factory automation sensors. IC Role / Device Role: TVS connected across output terminals to clamp fast transients before they reach precision op-amps or DACs. Use Value: Maintains analog signal accuracy by limiting transient-induced offset shifts and preventing output stage saturation during field wiring faults. |
| Microcontroller I/O Protection | Power Supply Rail Clamping |
Use Scenario: Safeguarding UART, SPI, and GPIO pins of automotive MCUs against ESD (IEC 61000-4-2 ±8 kV contact) and EFT (IEC 61000-4-4 ±2 kV). IC Role / Device Role: Low-capacitance unidirectional TVS placed inline with each I/O trace, referenced to local ground. Use Value: Enables reliable communication under harsh EMC conditions without degrading signal rise/fall times due to excessive junction capacitance. |
Use Scenario: Suppressing switching noise and cross-talk on 3.3 V or 5 V logic rails in motor drive control boards. IC Role / Device Role: TVS mounted directly at regulator output capacitor to absorb high-frequency ringing and inductive spikes. Use Value: Stabilizes rail voltage during MOSFET switching transitions, reducing digital logic glitches and ADC measurement errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11A | DO-214AA (SMB) package; 11.1 V VWM; 18.2 V VC @ 21.5 A; 600 W PPK rating. | Higher surge rating but larger footprint; requires PCB re-layout for surface-mount assembly. | Select SMBJ11A only if higher peak power margin is required and SMT process is available. |
| P6KE11A | DO-15 package; identical VWM (11.1 V) and VC (18.2 V); 600 W PPK; slower response due to higher junction capacitance (~100 pF vs. ~50 pF). | Compatible axial footprint but lower thermal performance (RθJA ≈ 120 °C/W); less suitable for high-repetition surge environments. | Choose P6KE11A only for cost-sensitive, low-duty-cycle applications where thermal derating is acceptable. |
Compared with SMBJ11A and P6KE11A, the BZW04-11 offers optimal balance of DO-41 through-hole compatibility, 400 W surge capacity, and 100 °C/W thermal resistance - making it preferred for space-constrained automotive modules requiring proven mechanical robustness and legacy assembly support.
Availability
BZW04-11 is available at Aetrix Electronics and suitable for automotive lighting control, industrial sensor interfaces, microcontroller I/O protection, and power supply rail clamping requiring stable component supply and long-term production continuity.
Supply support for BZW04-11 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 qualification capabilities.
The BZW04 series was engineered specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing low clamping voltage, tight VBR tolerance, and extended temperature operation up to +175 °C.
FAQ
What is the polarity configuration of the BZW04-11?
The BZW04-11 is a unidirectional TVS diode with cathode-band marking indicating the high-side terminal. It conducts only when the cathode is at least ~12.4 V above the anode, making it suitable for DC rail protection where polarity is fixed. This differs from bidirectional variants like BZW04-11B, which suppress surges regardless of polarity.
Does the BZW04-11 meet AEC-Q101 qualification?
The base BZW04-11 is not AEC-Q101 qualified; however, the BZW04-11B variant - explicitly marked with "B" suffix in the ordering code - undergoes full AEC-Q101 stress testing including temperature cycling, HAST, and mechanical shock. Always specify BZW04-11B for automotive under-hood applications requiring qualification evidence.
What is the maximum allowable surge current for the BZW04-11?
The BZW04-11 supports a maximum peak impulse current (IPP) of 22.0 A under the standard 10/1000 μs double-exponential waveform. This value is derived from its 400 W peak pulse power rating and 18.2 V clamping voltage (IPP = PPK / VC). Exceeding this current risks parametric shift or catastrophic failure.
How does the BZW04-11 compare to the P6KE11A in thermal performance?
The BZW04-11 has a junction-to-ambient thermal resistance (RθJA) of 100 °C/W on standard PCB, versus ~120 °C/W for the P6KE11A. This 20 % improvement allows the BZW04-11 to sustain higher surge repetition rates or operate reliably in hotter ambient conditions without exceeding its +175 °C TJ max limit.
Can the BZW04-11 be used in bidirectional signal line protection?
No - the BZW04-11 is unidirectional and must be used with correct polarity alignment. For bidirectional protection (e.g., RS-485, USB D+/D−), the BZW04-11B variant or a dedicated bidirectional TVS such as SMAJ11A is required. Using BZW04-11 on AC-coupled or polarity-agnostic lines risks open-circuit failure during negative transients.
BZW04-11 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 11.1V
- Voltage - Breakdown (Min):
- 12.4V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 22A
- 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)
BZW04-11 FAQ
1.How can I place an order for BZW04-11 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-11 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 BZW04-11 reliable?
The price and inventory of BZW04-11 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-11 is usually 5 days.
3.What payment methods are accepted for BZW04-11?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-11 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-11?
BZW04-11 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-11 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 BZW04-11?
For technical support, including BZW04-11 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-11 requirements.
6.How does Aetrix verify that BZW04-11 is sourced from the original manufacturer or authorized distributors?
All BZW04-11 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 BZW04-11 meets industry standards.
7.What is the process for return or replacement of BZW04-11?
All BZW04-11 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-11, 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 BZW04-11 part is unused and in its original packaging.
Return procedure for BZW04-11:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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