My Inquiry
My Account
Taiwan Semiconductor Corporation BZW04-171
- Part No.:
- BZW04-171
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-171.pdf
- Description:
- TVS DIODE 171VWM 274VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,129
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZW04-171 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 171 V working stand-off voltage (VWM), 190–210 V breakdown voltage (VBR) at 1 mA, 400 W peak pulse power (10/1000 µs), clamping voltage of 274 V at 1.5 A peak impulse current, and operates across –55 °C to +175 °C junction temperature - deployed in automotive lighting control modules and industrial sensor interfaces.
For engineers reviewing the BZW04-171 datasheet, BZW04-171 pinout, BZW04-171 application, or BZW04-171 equivalent, key selection criteria include verified clamping performance under 10/1000 µs transients, DO-41 package thermal derating behavior, unidirectional polarity marking, and AEC-Q101 qualification status for automotive-grade reliability validation.
Technical Context
The BZW04-171 functions as a silicon avalanche diode that enters controlled breakdown above its VWM to shunt transient energy away from downstream circuitry. Its low dynamic impedance ensures stable clamping during fast-rising EFT or lightning-induced surges, with typical reverse leakage <1 µA at 171 V.
It complies with ANSI/IEEE C62.35 for transient suppression and is rated for non-repetitive 400 W pulses per 10/1000 µs waveform. Thermal performance is defined by RθJL = 60 °C/W and RθJA = 100 °C/W on PCB, supporting operation up to 175 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 171 V - Maximum continuous DC or RMS voltage the device blocks without clamping |
| VBR @ IT=1 mA | 190–210 V - Confirmed avalanche onset range ensuring predictable turn-on margin above VWM |
| VC @ IPP=1.5 A | 274 V - Clamped voltage during 10/1000 µs surge, defining maximum stress on protected IC |
| PPK | 400 W - Peak pulse power handling capability per standard 10/1000 µs waveform |
| TJ max | +175 °C - Enables use in under-hood automotive environments and high-temperature industrial enclosures |
| Package | DO-204AL (DO-41) - Standard axial-leaded through-hole package with tin-plated leads per J-STD-002 |
| IR @ VWM | <1 µA - Minimal leakage current preserves system standby power integrity |
Pinout & Package
DO-204AL (DO-41) package: axial-leaded, glass-passivated silicon junction, cathode band marked on one end for unidirectional polarity identification. Leads are pure tin-plated and solderable per J-STD-002; weight ≈ 0.300 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or return path; defines current flow direction during clamping |
| Cathode | High-side surge input terminal | Connected to protected line; avalanche conduction occurs from cathode to anode when V > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option available | Validated for automotive applications including engine control units and body electronics requiring stress-tested reliability |
| 400 W surge rating (10/1000 µs) | Provides robust immunity against ISO 7637-2 Pulse 1, 2a, 3a/b and IEC 61000-4-5 Level 3 surges |
| Clamping voltage ≤274 V at 1.5 A | Ensures downstream 300 V-rated components remain within safe operating limits during transient events |
| Reverse leakage <1 µA at 171 V | Minimizes quiescent power loss in battery-backed or low-power sensor circuits |
| DO-41 mechanical compatibility | Supports legacy board layouts and automated through-hole assembly with standard lead spacing and bend profiles |
Applications
| Automotive Lighting Control | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LED driver ICs and microcontrollers in headlamp modules subjected to load dump and inductive switching transients. IC Role / Device Role: Unidirectional TVS placed between supply rail and ground to clamp positive-going surges. Use Value: Limits voltage excursion to ≤274 V, preventing latch-up or gate oxide damage in 200 V-rated MOSFETs and logic ICs. | Use Scenario: Safeguarding 4–20 mA transmitter front-ends and ADC inputs in process automation transmitters exposed to EFT bursts. IC Role / Device Role: Standoff protection element on analog input lines, absorbing fast transients before signal conditioning stages. Use Value: Maintains signal integrity by suppressing >1 kV EFT events while contributing <1 µA leakage at 171 V system bias. |
| Power Supply Input Stage | Motor Drive Gate Driver Protection |
Use Scenario: Secondary-side overvoltage suppression in 24 V DC-DC converters powering PLC I/O modules. IC Role / Device Role: Parallel-connected TVS across output capacitor to clamp flyback spikes and cross-regulation overshoot. Use Value: Delivers 400 W pulse handling without degradation, enabling compliance with EN 61000-4-5 surge immunity requirements. | Use Scenario: Protecting high-side gate drivers in BLDC motor inverters from Miller-induced voltage spikes during switching transitions. IC Role / Device Role: Localized clamping device referenced to driver ground, limiting gate-source voltage excursions. Use Value: Fast response time and low clamping impedance prevent false turn-on of SiC MOSFETs rated for 650 V blocking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170A | DO-214AA (SMB) package; 170 V VWM; 400 W rating; slightly lower VC (275 V @ 1.5 A) | Surface-mount alternative requiring PCB redesign; better thermal dissipation in compact layouts | Select SMBJ170A when space-constrained SMT assembly is required and reflow profile supports SMB footprint |
| P6KE180A | DO-15 package; 180 V VWM; 600 W rating; higher clamping voltage (287 V @ 2.1 A) | Higher power rating but larger body; less precise VWM match to 171 V system nominal | Choose P6KE180A only if 600 W surge margin is mandatory and 180 V VWM aligns with system tolerance stack-up |
Compared with SMBJ170A and P6KE180A, the BZW04-171 offers exact 171 V VWM alignment for 200 V-class systems, proven DO-41 through-hole reliability, and optimal clamping efficiency (274 V) - making it preferred for cost-sensitive, high-volume automotive and industrial replacements where leaded assembly remains standard.
Availability
BZW04-171 is available at Aetrix Electronics and suitable for automotive lighting control, industrial sensor interface protection, and DC power supply input stage applications requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant variants.
Supply support for BZW04-171 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 thyristors - serving automotive, industrial, and consumer markets since 1979.
The BZW04 series was developed to deliver high-reliability, high-power transient suppression in standard axial packages, targeting cost-effective replacement of legacy TVS families in automotive and industrial power systems.
FAQ
What is the breakdown voltage range of the BZW04-171?
The BZW04-171 has a specified breakdown voltage (VBR) range of 190 V to 210 V at 1 mA test current, measured per ANSI/IEEE C62.35. This range ensures consistent avalanche initiation above its 171 V working stand-off voltage, providing design margin against manufacturing variation and temperature drift. The BZW04-171 maintains this specification across its full operating temperature range of –55 °C to +175 °C.
Is the BZW04-171 suitable for automotive applications?
Yes - an AEC-Q101 qualified version of the BZW04-171 is available (order code BZW04-171H). It undergoes stress testing including temperature cycling, humidity bias, and high-temperature operating life per AEC-Q101 Rev D. The BZW04-171's 175 °C maximum junction temperature and robust clamping performance make it appropriate for under-hood and body-control module deployments where the BZW04-171 replaces older TVS families.
What is the clamping voltage of the BZW04-171 at its rated peak pulse current?
The BZW04-171 clamps to a maximum of 274 V at 1.5 A peak impulse current (IPP), tested using the standard 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring compatibility with 300 V-rated downstream components. The BZW04-171 achieves this with low dynamic impedance and minimal voltage overshoot.
Does the BZW04-171 have bidirectional capability?
No - the BZW04-171 is a unidirectional TVS diode, intended for DC line protection where polarity is fixed. Its cathode band marking indicates the high-side terminal. For AC or bipolar signal line protection, the complementary bidirectional variant BZW04-171B must be used. The BZW04-171 does not conduct in reverse bias below VBR and exhibits <1 µA leakage at 171 V, confirming strict unidirectional behavior.
What packaging options are available for the BZW04-171?
The BZW04-171 is supplied in DO-204AL (DO-41) package with two standard packing formats: 5,000 units per tape-and-reel (standard order code BZW04-171) and 3,000 units per ammo box (order code BZW04-171A0G). Lead finish is pure tin per J-STD-002, and the molding compound meets UL 94V-0 flammability rating. The BZW04-171's axial form factor supports both manual and automated through-hole assembly.
BZW04-171 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):
- 171V
- Voltage - Breakdown (Min):
- 190V
- Voltage - Clamping (Max) @ Ipp:
- 274V
- Current - Peak Pulse (10/1000µs):
- 1.5A
- 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)
BZW04-171 FAQ
1.How can I place an order for BZW04-171 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-171 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 BZW04-171 reliable?
The price and inventory of BZW04-171 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-171 is usually 5 days.
3.What payment methods are accepted for BZW04-171?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-171 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-171?
BZW04-171 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-171 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 BZW04-171?
For technical support, including BZW04-171 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-171 requirements.
6.How does Aetrix verify that BZW04-171 is sourced from the original manufacturer or authorized distributors?
All BZW04-171 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 BZW04-171 meets industry standards.
7.What is the process for return or replacement of BZW04-171?
All BZW04-171 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-171, 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 BZW04-171 part is unused and in its original packaging.
Return procedure for BZW04-171:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-171 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
