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Taiwan Semiconductor Corporation BZW04-154
- Part No.:
- BZW04-154
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-154.pdf
- Description:
- TVS DIODE 154VWM 246VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,062
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Product details
Overview
BZW04-154 from Taiwan Semiconductor is a unidirectional transient voltage suppressor diode (TVS) designed for high-energy surge protection in DC power rails and signal lines. It features a 154 V working stand-off voltage, 171–189 V breakdown voltage at 1 mA, 1.6 A peak impulse current, 246 V maximum clamping voltage at IPP, and 400 W peak pulse power rating per 10/1000 μs waveform - deployed in automotive lighting control modules to safeguard microcontrollers against load-dump transients.
For engineers reviewing the BZW04-154 datasheet, BZW04-154 pinout, BZW04-154 application, or BZW04-154 equivalent, key selection criteria include clamping voltage margin relative to system rail, junction temperature derating above 25°C, unidirectional polarity marking, DO-41 mechanical compatibility, and AEC-Q101 qualification status for automotive-grade reliability validation.
Technical Context
The BZW04-154 operates as a silicon avalanche diode with precise Zener-like breakdown behavior under transient overvoltage conditions. Its low dynamic impedance ensures rapid voltage clamping during 10/1000 μs surges, while its <1 μA reverse leakage at 154 V supports low-power standby integrity in always-on circuits.
Thermal performance is defined by 60°C/W junction-to-lead resistance and 100°C/W junction-to-ambient resistance on standard PCB pads. The device sustains operation from –55°C to +175°C junction temperature and complies with JESD201 Class 2 whisker resistance and UL 94V-0 flammability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 154 V - Maximum continuous DC operating voltage before conduction begins; sets upper limit for protected circuit rail. |
| VBR min/max | 171–189 V @ 1 mA - Confirmed breakdown range ensures reliable turn-on margin above VWM. |
| VC @ IPP | 246 V @ 1.6 A - Clamping voltage defines worst-case voltage seen by downstream ICs during surge. |
| PPK | 400 W - Peak pulse power handling per 10/1000 μs waveform; determines survivability of ISO 7637-2 Pulse 5a/b events. |
| TJ max | +175°C - Enables placement near heat sources (e.g., power MOSFETs) without thermal shutdown risk. |
| RθJL | 60°C/W - Low thermal resistance allows effective heat transfer to PCB leads, supporting sustained 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 and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path | Connected to ground or low-impedance reference; completes clamping loop during transient. |
| Cathode | Protected line input | Connected to positive rail or signal line; blocks normal operation but conducts during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option available | Validated for automotive underhood applications including temperature cycling, humidity bias, and mechanical shock. |
| 400 W surge capability at 10/1000 μs | Meets ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Level 4 immunity requirements. |
| Clamping voltage ≤246 V at 1.6 A | Provides ≥10% margin below 275 V absolute maximum rating of common 16-bit automotive MCUs. |
| Reverse leakage <1 μA at 154 V | Minimizes quiescent current drain in battery-backed systems and enables use in low-power wake-up circuits. |
Applications
| Automotive Lighting Control | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting LED driver ICs and CAN transceivers in headlamp ECU against alternator load dump transients up to 120 V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V rail and chassis ground to clamp surges before they reach sensitive analog front-ends. Use Value: Limits rail voltage excursion to ≤246 V during 400 W pulses, preventing latch-up or gate oxide damage in 3.3 V/5 V logic interfaces. | Use Scenario: Safeguarding 24 V digital input terminals of programmable logic controllers exposed to relay coil flyback and EFT bursts. IC Role / Device Role / Timing Role: Standoff protection element across input optocoupler supply pins to absorb repetitive 5 kV EFT noise without degradation. Use Value: Maintains <1 μA leakage at 24 V nominal, preserving input threshold accuracy while surviving >100,000 surge events per IEC 61000-4-4. |
| DC Power Supply Rail Protection | ESD-Sensitive Sensor Interface |
Use Scenario: Secondary overvoltage protection on 150 V intermediate bus in telecom power supplies after primary MOV stage. IC Role / Device Role / Timing Role: Precision clamping device triggered only when upstream protection fails or slow-rising transients exceed MOV response time. Use Value: Delivers 246 V clamping at 1.6 A with 10 ns response, enabling coordination with slower primary protectors without false triggering. | Use Scenario: Front-end protection for automotive ambient light sensors connected to 3.3 V MCU ADC inputs. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) unidirectional TVS placed directly at connector entry point to shunt HBM ±8 kV ESD strikes. Use Value: Prevents sensor offset drift and ADC saturation by limiting transient voltage to <250 V while adding negligible signal path capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ150A | DO-214AA package; 150 V VWM; 243 V VC @ 1.65 A; 600 W PPK rating | Higher surge rating but larger footprint; requires PCB re-layout for surface-mount integration | Select when higher energy absorption is required and SMT assembly is available. |
| P6KE150A | DO-15 package; 150 V VWM; 243 V VC @ 1.65 A; 600 W PPK; higher RθJA (105°C/W) | Same axial form factor but lower thermal efficiency; not AEC-Q101 qualified | Choose for cost-sensitive industrial designs where automotive qualification is unnecessary. |
Compared with SMBJ150A and P6KE150A, the BZW04-154 offers identical clamping performance in a smaller DO-41 outline, AEC-Q101 qualification for automotive use, and superior thermal resistance - making it optimal for space-constrained, high-reliability 12–24 V DC systems requiring long-term surge endurance.
Availability
BZW04-154 is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC input protection, and DC power supply rail protection requiring stable component supply and consistent surge performance across production batches.
Supply support for BZW04-154 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 for automotive, industrial, and consumer markets.
The BZW04 series was developed specifically for high-reliability transient suppression in harsh-environment applications - emphasizing tight parameter distribution, extended temperature operation, and AEC-Q101 compliance for under-hood automotive electronics.
FAQ
What is the polarity configuration of the BZW04-154?
The BZW04-154 is a unidirectional TVS diode with cathode band marking indicating the cathode terminal. It conducts only during positive transients on the cathode side relative to anode, making it suitable for DC rail protection where polarity is fixed. This differs from bidirectional variants like BZW04-154B, which suppress both polarities without regard to orientation.
Does the BZW04-154 meet automotive qualification standards?
Yes, the BZW04-154H variant is AEC-Q101 qualified, having passed stress tests including temperature cycling, high-temperature operating life, and mechanical shock. Standard BZW04-154 units are not pre-qualified but share identical die and packaging; qualification status is indicated by the "H" suffix in the ordering code.
What is the maximum clamping voltage of the BZW04-154 under surge conditions?
The BZW04-154 has a maximum clamping voltage (VC) of 246 V at 1.6 A peak impulse current (IPP), measured per 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and defines the highest voltage imposed on protected circuitry during standardized surge events.
How does thermal derating affect the BZW04-154's surge capability above 25°C?
The BZW04-154's peak pulse power rating decreases linearly above 25°C ambient, following the derating curve in Figure 2 of the datasheet. At 75°C, its 400 W rating drops to approximately 280 W; at 125°C, it falls to ~160 W - requiring system-level thermal design to maintain surge margin in high-temperature enclosures.
Can the BZW04-154 be used in bidirectional signal line protection?
No - the BZW04-154 is unidirectional and must be oriented with cathode toward the protected positive rail. For bidirectional signal lines (e.g., RS-485, CAN), the BZW04-154B variant is required. Using BZW04-154 on AC or reversible signals risks forward conduction and permanent damage during negative half-cycles.
BZW04-154 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):
- 154V
- Voltage - Breakdown (Min):
- 171V
- Voltage - Clamping (Max) @ Ipp:
- 246V
- Current - Peak Pulse (10/1000µs):
- 1.6A
- 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)
BZW04-154 FAQ
1.How can I place an order for BZW04-154 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-154 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 BZW04-154 reliable?
The price and inventory of BZW04-154 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-154 is usually 5 days.
3.What payment methods are accepted for BZW04-154?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-154 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-154?
BZW04-154 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-154 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 BZW04-154?
For technical support, including BZW04-154 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-154 requirements.
6.How does Aetrix verify that BZW04-154 is sourced from the original manufacturer or authorized distributors?
All BZW04-154 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 BZW04-154 meets industry standards.
7.What is the process for return or replacement of BZW04-154?
All BZW04-154 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-154, 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 BZW04-154 part is unused and in its original packaging.
Return procedure for BZW04-154:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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