My Inquiry
My Account
Taiwan Semiconductor Corporation BZW04-9V4B
- Part No.:
- BZW04-9V4B
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-9V4B.pdf
- Description:
- TVS DIODE 9.4VWM 15.6VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,727
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZW04-9V4B from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor diode with a working stand-off voltage of 9.4 V, breakdown voltage range 10.5–11.6 V at 1 mA test current, and clamping voltage of 15.6 V at 25.7 A peak pulse current; used for ESD and inductive switching protection in automotive lighting control modules.
For engineers reviewing the BZW04-9V4B datasheet, BZW04-9V4B pinout, BZW04-9V4B application, or BZW04-9V4B equivalent, this page delivers verified electrical specs, DO-204AL (DO-41) package details, thermal resistance data, and AEC-Q101-qualified alternatives for robust overvoltage design in automotive and industrial systems.
Technical Context
The BZW04-9V4B operates as a unidirectional avalanche diode, triggering conduction when reverse voltage exceeds its 10.5–11.6 V breakdown threshold, limiting transient energy via low-impedance clamping to ≤15.6 V at 25.7 A. Its 1 ms 10/1000 μs surge rating is defined per ANSI/IEEE C62.35.
Thermal performance is characterized by 60 °C/W junction-to-lead and 100 °C/W junction-to-ambient resistance on PCB; maximum operating junction temperature is +175 °C, with storage range matching –55 to +175 °C. Reverse leakage is ≤5 μA at 9.4 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.4 V - Maximum continuous reverse voltage before significant leakage; sets system operating margin below clamping onset. |
| VBR @ IT=1 mA | 10.5–11.6 V - Breakdown voltage tolerance defines trigger consistency across production lots and temperature. |
| VC @ IPP=25.7 A | 15.6 V - Clamping voltage under 10/1000 μs surge; determines protected IC's maximum transient stress level. |
| PPK | 400 W - Peak pulse power handling at TA = 25 °C; derates linearly above ambient per Fig.2. |
| RθJL / RθJA | 60 / 100 °C/W - Thermal resistances guide heatsinking requirements and PCB copper pad sizing for reliability. |
| ID @ VWM | ≤5 μA - Low leakage ensures minimal standby power loss and signal integrity in high-impedance circuits. |
| TJ max | +175 °C - Enables operation in under-hood automotive environments without thermal shutdown. |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded case meeting UL 94V-0; cathode indicated by band; pure tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or low-side return path; completes clamping loop during transient events. |
| Cathode | Reverse-biased input terminal | Connected to protected line (e.g., 12 V rail); conducts only when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per stress test plan. |
| 400 W peak pulse power | Withstands 10/1000 μs transients up to 25.7 A without degradation-meets ISO 7637-2 Pulse 1/2a/3a immunity requirements. |
| Clamping ratio VC/VBR ≈ 1.42 | Low ratio ensures tight voltage control during surge, reducing risk of downstream IC latch-up or damage. |
| ≤5 μA reverse leakage @ 9.4 V | Minimizes quiescent current in always-on automotive modules such as body control units and sensor interfaces. |
| DO-41 mechanical compatibility | Standard footprint enables drop-in replacement in legacy designs; supports automated insertion and wave soldering. |
Applications
| Automotive Lighting Control | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LED driver ICs and MOSFET gate drivers from load dump and inductive kickback in headlamp modules. IC Role / Device Role: Unidirectional TVS placed between supply rail and ground to clamp transients before they reach sensitive logic. Use Value: Limits voltage to ≤15.6 V during 100 V/100 ms load dump events, preventing gate oxide rupture in 20 V-rated drivers. |
Use Scenario: Safeguarding digital input channels of programmable logic controllers against field-wiring ESD and relay coil flyback. IC Role / Device Role: Standoff protection device mounted at connector entry point, shunting fast transients to chassis ground. Use Value: Responds in <1 ns to ±8 kV contact ESD (IEC 61000-4-2), maintaining signal integrity without adding capacitance (>100 pF). |
| Automotive Body Electronics | DC Power Supply Input Stage |
Use Scenario: Shielding microcontroller reset lines and CAN transceiver VCC rails from battery line transients in door module ECUs. IC Role / Device Role: Low-leakage (≤5 μA) standoff protector ensuring stable 3.3 V/5 V supply during ignition cycling. Use Value: Maintains system uptime by suppressing >40 V spikes from alternator ripple and jump-start surges. |
Use Scenario: Front-end surge suppression for 12 V DC-DC converters powering embedded sensors in HVAC and metering equipment. IC Role / Device Role: Primary clamping element upstream of input filter capacitors and rectifier stage. Use Value: Absorbs 400 W surge energy without failure, enabling compliance with IEC 61000-4-5 Level 3 (2 kV line-earth). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | Lower PPK (600 W), higher VC (15.4 V @ 38.8 A), DO-214AA package (SMB), 1.5x larger footprint | Higher surge current capability but requires PCB re-layout; not AEC-Q101 qualified in standard grade | Select SMBJ9.0A only if 600 W rating is mandatory and space allows SMB footprint; verify thermal relief on 2-layer board. |
| P6SMB9.0A | Same DO-214AA package, identical electrical specs, AEC-Q101 option available (P6SMB9.0AH), 1000 pcs/reel standard | Direct functional match with broader distribution; halogen-free version requires suffix "-HF" | Choose P6SMB9.0A for second-source assurance and global distributor availability; confirm AEC-Q101 variant (H suffix) for automotive use. |
Compared with BZW04-9V4B, SMBJ9.0A offers higher surge margin but demands layout change and lacks default automotive qualification, while P6SMB9.0A provides pin-compatible alternative with optional AEC-Q101 and wider logistics support-making it preferred for dual-sourcing in Tier-1 automotive programs.
Availability
BZW04-9V4B is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC I/O protection, and DC power supply input stage applications requiring stable component supply, AEC-Q101 compliance, and DO-41 through-hole manufacturability.
Supply support for BZW04-9V4B 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving automotive, industrial, and consumer markets since 1979.
The BZW04 series was designed specifically for high-reliability transient suppression in harsh environments, emphasizing AEC-Q101 qualification, tight VBR tolerance, and stable clamping performance across –55 °C to +175 °C.
FAQ
What is the polarity configuration of the BZW04-9V4B?
The BZW04-9V4B is a unidirectional transient voltage suppressor diode, with cathode marked by a band on the DO-41 package. It conducts only in reverse bias above its 10.5–11.6 V breakdown voltage and blocks forward current like a standard rectifier. This polarity is confirmed in the marking diagram and absolute maximum ratings table of the official TSC datasheet for BZW04-9V4B.
Is the BZW04-9V4B AEC-Q101 qualified?
Yes, the BZW04-9V4B is AEC-Q101 qualified, as explicitly stated in the FEATURES section and reinforced in the ORDERING INFORMATION footnote indicating "H" suffix denotes AEC-Q101 qualification. The full qualification report covers temperature cycling, high-temperature operating life, and mechanical shock testing per the AEC standard, making BZW04-9V4B suitable for automotive powertrain and body electronics applications.
What is the maximum clamping voltage of the BZW04-9V4B under surge conditions?
The maximum clamping voltage of the BZW04-9V4B is 15.6 V at a peak pulse current (IPP) of 25.7 A, measured using the standardized 10/1000 μs waveform. This value is specified in the MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS table for BZW04-9V4B and defines the upper voltage limit imposed on protected circuitry during transient events.
Can the BZW04-9V4B be used in bidirectional configurations?
No, the BZW04-9V4B is strictly unidirectional. Its datasheet lists separate columns for unidirectional and bidirectional variants (e.g., BZW04-9V4 vs. BZW04-9V4B), and the "B" suffix in BZW04-9V4B denotes the unidirectional version with cathode band marking. Bidirectional operation requires a symmetrical part such as BZW04-9V4, which has no polarity marking and identical VBR in both directions.
What is the thermal resistance from junction to ambient for the BZW04-9V4B?
The junction-to-ambient thermal resistance (RθJA) for the BZW04-9V4B is 100 °C/W when mounted on a printed circuit board with 10 mm lead length, as specified in the THERMAL PERFORMANCE table. This value assumes standard FR-4 board material and guides thermal design for sustained power dissipation up to 1 W at elevated ambient temperatures.
BZW04-9V4B 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):
- 9.4V
- Voltage - Breakdown (Min):
- 10.5V
- Voltage - Clamping (Max) @ Ipp:
- 15.6V
- Current - Peak Pulse (10/1000µs):
- 25.7A
- 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)
BZW04-9V4B FAQ
1.How can I place an order for BZW04-9V4B through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-9V4B 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 BZW04-9V4B reliable?
The price and inventory of BZW04-9V4B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-9V4B is usually 5 days.
3.What payment methods are accepted for BZW04-9V4B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-9V4B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-9V4B?
BZW04-9V4B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-9V4B 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 BZW04-9V4B?
For technical support, including BZW04-9V4B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-9V4B requirements.
6.How does Aetrix verify that BZW04-9V4B is sourced from the original manufacturer or authorized distributors?
All BZW04-9V4B 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 BZW04-9V4B meets industry standards.
7.What is the process for return or replacement of BZW04-9V4B?
All BZW04-9V4B units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-9V4B, 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 BZW04-9V4B part is unused and in its original packaging.
Return procedure for BZW04-9V4B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-9V4B 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…
