My Inquiry
My Account
Taiwan Semiconductor Corporation BZW04-14B
- Part No.:
- BZW04-14B
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-14B.pdf
- Description:
- TVS DIODE 13.6VWM 22.5VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZW04-14B from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in automotive and industrial power rails. It features a 13.6 V working stand-off voltage (VWM), 15.2–16.8 V breakdown voltage (VBR @ 1 mA), 22.5 V maximum clamping voltage (VC @ 17.8 A), 400 W peak pulse power (10/1000 µs), and operates across –55 °C to +175 °C junction temperature range - deployed in ESD-critical lighting control modules and inductive load drivers.
For engineers reviewing the BZW04-14B datasheet, BZW04-14B pinout, BZW04-14B application, or BZW04-14B equivalent, this page delivers verified electrical parameters, DO-41 package integration guidance, clamping performance under 10/1000 µs transients, thermal resistance data (RθJA = 100 °C/W), and AEC-Q101-qualified alternatives for automotive-grade design validation.
Technical Context
The BZW04-14B is a silicon avalanche diode optimized for unidirectional clamping of fast-rising transients up to 400 W. Its low dynamic impedance ensures stable clamping at 22.5 V under 17.8 A peak impulse current (IPP), with <1 µA reverse leakage at 13.6 V (VWM) and 0.083 %/°C VBR temperature coefficient.
It complies with ANSI/IEEE C62.35 surge waveform standards and is rated for non-repetitive 10/1000 µs pulses. The device uses a DO-204AL (DO-41) axial package with pure tin-plated leads, UL 94V-0 molding compound, and meets JESD201 Class 2 whisker resistance - enabling direct replacement in legacy through-hole TVS designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13.6 V - Maximum continuous DC or RMS voltage the device blocks without conduction; sets system operating margin before clamping onset. |
| VBR @ IT = 1 mA | 15.2–16.8 V - Measured breakdown threshold defining reliable avalanche initiation; tight 10.5% tolerance enables precise overvoltage trip setting. |
| VC @ IPP = 17.8 A | 22.5 V - Clamped voltage during 400 W transient; limits downstream IC stress to safe levels under worst-case 10/1000 µs surges. |
| PPK | 400 W - Peak pulse power handling per 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surge immunity compliance. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on PCB with 10 mm lead length; informs derating above 25 °C ambient for sustained reliability. |
| IR @ VWM | <1 µA - Reverse leakage at stand-off voltage; minimizes quiescent power loss in battery-backed or low-power sensor circuits. |
Pinout & Package
Package: DO-204AL (DO-41), axial-leaded, epoxy-molded case with cathode band marking for unidirectional polarity. Lead finish: pure tin, solderable per J-STD-002. Weight: 0.300 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction; grounded or connected to low-side return path in clamping configuration. | Provides reference node for unidirectional clamping to ground; must be routed with low-inductance trace to minimize overshoot. |
| Cathode | Protected line connection; connects to supply rail (e.g., 12 V battery line) requiring transient suppression. | Carries full surge current during avalanche; requires adequate copper area and thermal relief for 175 °C max junction temperature handling. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option available | Validated for automotive under-hood applications including engine control units and body electronics with extended temperature cycling and humidity testing. |
| 400 W peak pulse rating (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 Combination Wave surges up to 4 kV (open-circuit)/2 kA (short-circuit). |
| Clamping ratio VC/VBR ≈ 1.42 | Indicates high surge energy absorption efficiency - lower ratio than typical Zener-based protectors improves system voltage margin. |
| 0.083 %/°C VBR tempco | Ensures predictable breakdown shift across –55 °C to +175 °C; critical for engine bay or industrial enclosure deployments. |
| RoHS & halogen-free (IEC 61249-2-21) | Meets global environmental compliance requirements for automotive OEMs and industrial equipment manufacturers without compromising surge performance. |
Applications
| Automotive Lighting Control | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting LED driver ICs and MOSFET gate drivers from load-dump transients in 12 V vehicle lighting systems. IC Role / Device Role: Unidirectional TVS placed between supply rail and ground to clamp positive-going spikes up to 400 W. Use Value: Limits clamped voltage to 22.5 V, preventing damage to 30 V-rated logic-level MOSFETs and 24 V-input buck controllers. |
Use Scenario: Safeguarding digital input terminals of programmable logic controllers exposed to inductive kickback from solenoid valves. IC Role / Device Role: Standoff protection device mounted at terminal block entry point to absorb 10/1000 µs switching surges. Use Value: Withstands 17.8 A peak impulse while maintaining <1 µA leakage at 13.6 V, preserving signal integrity in 24 V DC input circuits. |
| ESD-Sensitive Sensor Interface | Power Supply Rail Clamp |
Use Scenario: Shielding analog front-end ICs (e.g., Hall-effect sensors) from contact ESD events in automotive cabin modules. IC Role / Device Role: Low-leakage TVS on VDD line upstream of LDO regulator to shunt ±8 kV HBM ESD pulses. Use Value: Sub-1 µA leakage at 13.6 V avoids loading precision bias networks; 22.5 V clamping prevents latch-up in 16 V-tolerant op-amps. |
Use Scenario: Secondary overvoltage clamp on 12 V DC-DC converter output feeding microcontroller power domains. IC Role / Device Role: Redundant protection stage after primary input TVS to handle residual transients escaping upstream filtering. Use Value: 400 W rating absorbs coupled noise from adjacent switching regulators; DO-41 footprint allows retrofit into existing through-hole layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14A | Same 14 V nominal VWM, but SMC (DO-214AB) surface-mount package; 1.5x higher IPP (23.7 A), slightly higher VC (23.2 V). | Requires PCB redesign for SMT placement; better suited for high-volume automated assembly vs. through-hole prototyping. | Select SMBJ14A when migrating to SMT platforms and needing higher surge margin; verify thermal pad layout for RθJA = 50 °C/W. |
| P6KE15A | Legacy 600 W PPK rating, larger DO-15 package; VWM = 12.8 V, VC = 24.4 V @ 24.6 A; no AEC-Q101 variant. | Higher clamping voltage reduces system margin; used in cost-sensitive industrial power supplies where AEC-Q101 not required. | Choose P6KE15A only for non-automotive applications needing higher peak power; avoid where space or automotive qualification is critical. |
Compared with SMBJ14A and P6KE15A, the BZW04-14B offers optimal balance of through-hole compatibility, AEC-Q101 readiness, and tightly controlled 22.5 V clamping - making it preferred for automotive lighting and industrial control upgrades where board real estate and qualification alignment matter.
Availability
BZW04-14B is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC input protection, ESD-sensitive sensor interface, and power supply rail clamp applications requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for BZW04-14B 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 - serving automotive, industrial, and consumer markets since 1979.
The BZW04 series was developed specifically for high-reliability transient suppression in harsh environments, emphasizing AEC-Q101 qualification, tight parametric tolerances, and robust thermal performance in axial packages.
FAQ
What is the maximum clamping voltage of the BZW04-14B under standard test conditions?
The BZW04-14B has a maximum clamping voltage (VC) of 22.5 V when subjected to a 17.8 A peak impulse current (IPP) using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings. The BZW04-14B maintains this clamping performance across its full operating temperature range.
Is the BZW04-14B suitable for automotive applications?
Yes - the BZW04-14B is offered in an AEC-Q101-qualified version (marked with suffix "H", e.g., BZW04-14BH), validated for automotive use including temperature cycling, humidity testing, and mechanical shock. Even the standard BZW04-14B shares identical electrical specs and DO-41 packaging, making it widely adopted in non-safety-critical automotive subsystems like interior lighting and body control modules. Always verify qualification status via ordering code when sourcing for automotive programs.
What is the reverse leakage current specification for the BZW04-14B at its working stand-off voltage?
The BZW04-14B exhibits a maximum reverse leakage current (ID) of 1 µA at its working stand-off voltage (VWM) of 13.6 V, tested at TA = 25 °C. This ultra-low leakage preserves power efficiency in always-on circuits such as battery-backed sensors or low-quiescent-current power supplies. The spec remains valid across the full –55 °C to +175 °C junction temperature range, with minimal increase up to 10 µA at maximum TJ.
How does the BZW04-14B differ from bidirectional variants like BZW04-14BB?
The BZW04-14B is unidirectional and features a cathode band marking for polarity-sensitive placement, while BZW04-14BB is bidirectional with symmetrical clamping for AC or floating-line protection. Both share identical VWM (13.6 V), VBR (15.2–16.8 V), and VC (22.5 V) specs, but the unidirectional BZW04-14B provides lower leakage (<1 µA) and tighter VBR tolerance in DC-biased applications - making it preferred for 12 V automotive rails and regulated DC supplies where polarity is fixed.
What thermal derating applies to the BZW04-14B at elevated ambient temperatures?
The BZW04-14B follows a linear derating curve starting at 25 °C ambient: peak pulse power decreases by ~0.5% per °C above 25 °C, per Figure 2 in the datasheet. At 75 °C ambient, its 400 W rating drops to ~200 W. For steady-state dissipation, its 1 W rating at TL = 75 °C (lead temperature) implies RθJL = 60 °C/W - meaning junction temperature rise is 60 °C per watt. Proper PCB copper area and lead length control are essential to maintain TJ ≤ 175 °C.
BZW04-14B 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):
- 13.6V
- Voltage - Breakdown (Min):
- 15.2V
- Voltage - Clamping (Max) @ Ipp:
- 22.5V
- Current - Peak Pulse (10/1000µs):
- 17.8A
- 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)
BZW04-14B FAQ
1.How can I place an order for BZW04-14B through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-14B 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 BZW04-14B reliable?
The price and inventory of BZW04-14B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-14B is usually 5 days.
3.What payment methods are accepted for BZW04-14B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-14B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-14B?
BZW04-14B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-14B 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 BZW04-14B?
For technical support, including BZW04-14B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-14B requirements.
6.How does Aetrix verify that BZW04-14B is sourced from the original manufacturer or authorized distributors?
All BZW04-14B 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 BZW04-14B meets industry standards.
7.What is the process for return or replacement of BZW04-14B?
All BZW04-14B units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-14B, 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 BZW04-14B part is unused and in its original packaging.
Return procedure for BZW04-14B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-14B 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…
