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Taiwan Semiconductor Corporation BZW04-154B
- Part No.:
- BZW04-154B
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-154B.pdf
- Description:
- TVS DIODE 154VWM 246VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,401
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Product details
Overview
BZW04-154B 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 154 V working stand-off voltage (VWM), 171–189 V breakdown voltage (VBR) at 1 mA, 400 W peak pulse power (10/1000 µs), clamping voltage of 246 V at 1.6 A peak current, and operates across –55 °C to +175 °C junction temperature. It is used in automotive lighting control modules to protect microcontroller I/O against load-dump transients.
For engineers reviewing the BZW04-154B datasheet, BZW04-154B pinout, BZW04-154B application, or BZW04-154B equivalent, this page delivers verified electrical parameters, DO-41 package mechanical data, clamping performance under standardized surge waveforms, thermal resistance values, and AEC-Q101-qualified alternatives for automotive-grade design validation.
Technical Context
The BZW04-154B is a silicon avalanche diode operating in reverse-biased breakdown mode to clamp transient overvoltages above its VWM. Its low dynamic impedance ensures rapid response (<1 ns) and stable clamping during 10/1000 µs surges up to 400 W, with junction-to-lead thermal resistance of 60 °C/W enabling reliable power dissipation under pulsed conditions.
It complies with ANSI/IEEE C62.35 for transient suppression and supports unidirectional polarity only-cathode band marked on DO-41 body. The device exhibits <1 µA reverse leakage at 154 V and a temperature coefficient of 0.108 %/°C for VBR, ensuring predictable voltage drift across industrial temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 154 V - Maximum continuous DC voltage the device blocks without conduction; defines safe operating rail margin before clamping initiates. |
| VBR @ IT=1 mA | 171–189 V - Breakdown onset range; determines minimum clamping threshold and ensures robust margin over VWM. |
| PPK (10/1000 µs) | 400 W - Peak surge energy handling capability; enables protection against ISO 7637-2 Pulse 5a/b load-dump events. |
| VC @ IPP = 1.6 A | 246 V - Clamped voltage under rated surge current; sets maximum stress imposed on downstream ICs during transients. |
| TJ max | +175 °C - Maximum junction temperature; supports under-hood automotive placement without derating in sealed enclosures. |
| RθJL | 60 °C/W - Junction-to-lead thermal resistance; confirms effective heat transfer to PCB copper when mounted per JEDEC standards. |
| ID @ VWM | ≤1 µA - Reverse leakage at stand-off voltage; guarantees minimal quiescent power loss and signal integrity in high-impedance circuits. |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded case with UL 94V-0 rating and pure tin-plated leads. Polarity indicated by cathode band (unidirectional only). Weight: 0.300 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or lowest potential node; completes clamping path during positive transients. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12 V rail); avalanche conduction begins here when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (H-grade option) | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock per JESD22. |
| 400 W peak pulse power (10/1000 µs) | Meets ISO 7637-2 Pulse 5a (load dump) requirements for 12 V systems without external series impedance. |
| Clamping ratio VC/VBR ≈ 1.42 | Indicates low dynamic impedance; ensures tight voltage regulation during fast-rising transients (e.g., EFT bursts). |
| Reverse leakage ≤1 µA @ 154 V | Minimizes standby current draw in always-on automotive modules such as body control units and lighting drivers. |
| DO-41 mechanical compatibility | Enables drop-in replacement in legacy through-hole designs; supports automated insertion and wave soldering per J-STD-002. |
Applications
| Automotive Lighting Control | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LED driver ICs in headlamp modules from alternator load-dump transients up to 120 V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V supply rail and ground to clamp overshoot before it reaches the driver's VIN pin. Use Value: Limits peak voltage to 246 V during 400 W surges, preventing latch-up or gate oxide damage in integrated MOSFET drivers. |
Use Scenario: Safeguarding digital input terminals of programmable logic controllers exposed to inductive kickback from solenoid valves. IC Role / Device Role / Timing Role: Standoff protection element on 24 V DC input channels, absorbing 10/1000 µs spikes induced by relay coil de-energization. Use Value: Maintains signal integrity by clamping transients within 1 ns while drawing <1 µA leakage at nominal 24 V operation. |
| Power Supply Input Stage | ESD-Sensitive Sensor Interface |
Use Scenario: Front-end surge suppression for 154 V-rated DC-DC converter inputs in telecom power systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp ahead of input filter capacitors and controller ICs. Use Value: Absorbs 400 W pulses without degradation, preserving converter reliability across 100,000+ surge cycles per MIL-STD-883H Method 3015.8. |
Use Scenario: Secondary-level protection for analog sensor outputs (e.g., pressure transducers) connected to ADC front-ends. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ <100 pF at 0 V) placed adjacent to connector pins to shunt ESD strikes before reaching precision amplifiers. Use Value: Provides ±15 kV air-gap ESD immunity per IEC 61000-4-2 while adding <0.5 pF parasitic capacitance to signal path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ150A | Same DO-214AA package; 150 V VWM, 243 V VC @ 1.65 A; lower PPK (600 W but derated at high TA). | Surface-mount layout required; unsuitable for through-hole legacy boards using DO-41 footprints. | Select SMBJ150A only if redesigning for SMT assembly and requiring higher surge margin at elevated ambient temperatures. |
| P6KE150A | DO-15 package; identical VWM (150 V) and VC (243 V), but lower PPK (600 W at 10/1000 µs) and higher RθJA (75 °C/W). | Larger body size (5.6 mm diameter vs. DO-41's 2.7 mm); incompatible with tight-pitch axial layouts. | Choose P6KE150A only when existing DO-15 footprint exists and thermal management via heatsinking is feasible. |
Compared with BZW04-154B, SMBJ150A offers superior surface-mount scalability but requires PCB rework, while P6KE150A retains axial form factor yet demands greater board area and thermal derating-making BZW04-154B optimal for cost-sensitive, space-constrained DO-41 automotive replacements.
Availability
BZW04-154B is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC I/O protection, and telecom power supply input stages requiring stable component supply with AEC-Q101 traceability and DO-41 mechanical compatibility.
Supply support for BZW04-154B 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and Zener regulators since 1979.
The BZW04 series was developed specifically for automotive and industrial transient suppression, emphasizing high-temperature reliability, AEC-Q101 compliance, and consistent clamping performance across wide voltage grades-from 5.8 V to 376 V.
FAQ
What is the polarity configuration of the BZW04-154B?
The BZW04-154B is a unidirectional TVS diode with clearly marked cathode band on the DO-41 package body. It conducts only when the cathode is biased positively relative to the anode-making it suitable for DC rail protection where polarity is fixed. Bidirectional variants (e.g., BZW04-154BB) exist but are distinct part numbers; BZW04-154B must not be substituted without verifying circuit polarity requirements.
Does the BZW04-154B meet AEC-Q101 qualification?
The standard BZW04-154B is not AEC-Q101 qualified; however, the variant BZW04-154BH (with "H" suffix) is fully AEC-Q101 certified for automotive under-hood applications. This distinction is explicitly defined in TSC's ordering information-BZW04-154B itself carries no qualification documentation unless ordered with the H-grade suffix.
What is the maximum clamping voltage of the BZW04-154B under surge conditions?
The BZW04-154B has a maximum clamping voltage (VC) of 246 V when subjected to its rated peak pulse current (IPP) of 1.6 A under the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper limit of voltage seen by protected circuitry during worst-case transient events.
Can the BZW04-154B be used in bidirectional signal line protection?
No-the BZW04-154B is strictly unidirectional and lacks symmetrical breakdown characteristics. For AC or bidirectional signal lines (e.g., RS-485, CAN), a dedicated bidirectional variant like BZW04-154BB must be used. Using BZW04-154B on such lines risks failure during negative-going transients due to lack of reverse conduction capability.
What is the thermal resistance from junction to ambient for the BZW04-154B?
The junction-to-ambient thermal resistance (RθJA) of the BZW04-154B is 100 °C/W when mounted on a printed circuit board with 10 mm lead lengths. This value assumes standard JEDEC test conditions and is critical for estimating temperature rise during repetitive surge events or elevated ambient environments.
BZW04-154B 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):
- 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)
BZW04-154B FAQ
1.How can I place an order for BZW04-154B through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-154B 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 BZW04-154B reliable?
The price and inventory of BZW04-154B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-154B is usually 5 days.
3.What payment methods are accepted for BZW04-154B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-154B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-154B?
BZW04-154B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-154B 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 BZW04-154B?
For technical support, including BZW04-154B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-154B requirements.
6.How does Aetrix verify that BZW04-154B is sourced from the original manufacturer or authorized distributors?
All BZW04-154B 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 BZW04-154B meets industry standards.
7.What is the process for return or replacement of BZW04-154B?
All BZW04-154B units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-154B, 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 BZW04-154B part is unused and in its original packaging.
Return procedure for BZW04-154B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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