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Taiwan Semiconductor Corporation BZW04-94B
- Part No.:
- BZW04-94B
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-94B.pdf
- Description:
- TVS DIODE 94VWM 152VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,030
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Product details
Overview
BZW04-94B 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 94 V working stand-off voltage (VWM), 105–116 V breakdown voltage (VBR @ 1 mA), 152 V maximum clamping voltage (VC @ 2.6 A), and 400 W peak pulse power rating at 10/1000 µs waveform - deployed in automotive lighting control, industrial sensor interfaces, and ESD-sensitive microcontroller I/O protection.
For engineers reviewing the BZW04-94B datasheet, BZW04-94B pinout, BZW04-94B application, or BZW04-94B equivalent, key selection criteria include clamping performance under 2.6 A surge current, thermal derating above 25°C ambient, DO-41 package lead-to-junction thermal resistance (60 °C/W), and AEC-Q101 qualification status for automotive-grade reliability validation.
Technical Context
The BZW04-94B operates as a silicon avalanche diode with unidirectional polarity, triggered when reverse voltage exceeds its 105–116 V breakdown threshold. Its low dynamic impedance enables rapid clamping response (<1 ns), limiting transient-induced overvoltage to ≤152 V during 2.6 A 10/1000 µs surges.
Thermally, it sustains 400 W non-repetitive peak power at TA = 25°C but requires linear derating above that temperature (per Fig.2), with junction-to-lead thermal resistance of 60 °C/W and steady-state power dissipation limited to 1 W at TL = 75°C on 5×5 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 94.0 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC rail margin. |
| VBR @ IT | 105–116 V @ 1 mA - Breakdown voltage range confirming reliable turn-on threshold for overvoltage events. |
| VC @ IPP | 152 V @ 2.6 A - Clamped voltage during full-rated 10/1000 µs surge; determines protected circuit's worst-case stress level. |
| PPK | 400 W - Peak pulse power handling capability; validates suitability for IEC 61000-4-5 Level 3/4 surge immunity. |
| TJ max | +175 °C - Maximum junction temperature; supports operation in under-hood automotive environments. |
| RθJL | 60 °C/W - Junction-to-lead thermal resistance; informs heatsinking requirements for sustained surge duty cycles. |
| ID @ VWM | ≤1 µA - Reverse leakage at 94 V; ensures minimal standby power loss in battery-powered systems. |
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 | Forward conduction terminal | Connected to system ground or low-side return path; conducts during forward-biased transients or fault conditions. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail); avalanches into conduction when voltage exceeds VBR, shunting surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test requirements. |
| 400 W surge rating (10/1000 µs) | Meets IEC 61000-4-5 surge immunity standards for industrial and automotive subsystems. |
| Clamping voltage ≤152 V @ 2.6 A | Ensures downstream ICs rated for ≤160 V absolute maximum survive worst-case transients without latch-up or damage. |
| Low leakage ≤1 µA @ 94 V | Minimizes quiescent current draw in always-on circuits such as CAN bus nodes or remote sensors. |
| DO-41 package with UL 94V-0 molding | Enables manual or automated through-hole assembly while meeting flammability safety compliance for end equipment. |
Applications
| Automotive Lighting Control | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LED driver ICs and MOSFET gate drivers from load-dump and inductive kickback in headlamp modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V supply rail and ground to clamp transients up to ±100 V. Use Value: Limits voltage excursion to ≤152 V during 2.6 A surges, preventing gate oxide rupture in driver FETs and latch-up in PWM controllers. |
Use Scenario: Safeguarding 4–20 mA current-loop transmitters and analog front-ends from ESD and fast transients in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional clamping not applicable; BZW04-94B used unidirectionally across supply rail to absorb positive-going spikes only. Use Value: Sub-1 ns response time ensures clamping occurs before sensitive op-amps or ADC inputs exceed absolute maximum ratings. |
| Microcontroller I/O Line Protection | DC Power Rail Surge Suppression |
Use Scenario: Shielding UART, SPI, or GPIO pins of automotive microcontrollers (e.g., RH850, S32K) from ESD and coupled noise. IC Role / Device Role / Timing Role: Placed in series with current-limiting resistor and parallel to I/O pin, referenced to ground. Use Value: 1 µA leakage preserves signal integrity and battery life in low-power wake-on-RX modes without loading the pin. |
Use Scenario: Guarding 24 V industrial power supplies against switching transients from relay coils and motor drives. IC Role / Device Role / Timing Role: Mounted directly across input terminals to divert surge energy before reaching DC/DC converters or LDOs. Use Value: 400 W rating accommodates repetitive 10/1000 µs surges per IEC 61000-4-4, extending system uptime in harsh EFT environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A (Bourns) | DO-214AA package; 90 V VWM; 100 V VBR min; 170 V VC @ 2.8 A; 600 W PPK | Higher surge rating but larger footprint; lower clamping voltage at comparable current | Select SMBJ90A when PCB space allows SMC/SMB package and higher 600 W surge margin is required. |
| P6KE91A (ON Semiconductor) | DO-15 package; 91 V VWM; 101 V VBR min; 150 V VC @ 2.7 A; 600 W PPK | Same clamping performance at slightly lower VWM; legacy DO-15 leads require longer hole spacing | Choose P6KE91A for cost-sensitive industrial designs where DO-15 compatibility with existing tooling is prioritized. |
Compared with BZW04-94B, SMBJ90A offers higher surge capacity in a surface-mount package but requires re-layout, while P6KE91A matches clamping performance in a through-hole variant with different mechanical dimensions - neither is pin-compatible, but both serve analogous 90–94 V rail protection roles with verified IEC 61000-4-5 compliance.
Availability
BZW04-94B is available at Aetrix Electronics and suitable for automotive lighting control, industrial sensor interface protection, and DC power rail surge suppression requiring stable component supply, AEC-Q101 qualification, and DO-41 through-hole assembly compatibility.
Supply support for BZW04-94B 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 for automotive, industrial, and consumer markets.
The BZW04 series was developed specifically for high-reliability transient suppression in automotive electronics and industrial controls, emphasizing AEC-Q101 compliance, tight VBR tolerance, and robust thermal performance in legacy through-hole packages.
FAQ
What is the polarity configuration of the BZW04-94B?
The BZW04-94B is a unidirectional TVS diode, marked with a cathode band indicating the cathode terminal. It conducts in reverse bias during overvoltage events and blocks forward current like a standard rectifier. This configuration makes BZW04-94B suitable for protecting positive DC rails where only negative-going transients are suppressed - unlike bidirectional variants (e.g., BZW04-94B) which handle both polarities.
Does the BZW04-94B meet AEC-Q101 qualification?
Yes, the BZW04-94B is AEC-Q101 qualified when ordered with the "H" suffix (e.g., BZW04-94BH). The base part number BZW04-94B itself refers to the standard industrial version; qualification status must be confirmed via ordering code. AEC-Q101 testing covers temperature cycling, humidity bias, ESD, and mechanical shock - all validated for BZW04-94BH per TSC documentation.
What is the maximum clamping voltage of the BZW04-94B under surge conditions?
The BZW04-94B has a maximum clamping voltage (VC) of 152 V at a peak pulse current (IPP) of 2.6 A, tested with a 10/1000 µs waveform. This value represents the upper limit of voltage seen by downstream circuitry during a full-rated surge event and is critical for ensuring protected ICs remain within their absolute maximum voltage ratings.
Can the BZW04-94B be used in bidirectional protection applications?
No - the BZW04-94B is strictly unidirectional. For bidirectional transient suppression, the designated variant is BZW04-94BB (or BZW04-94B with "B" suffix), which uses a back-to-back diode configuration. Using BZW04-94B in bidirectional scenarios leaves positive transients unclamped and risks device failure; always verify suffix coding before layout integration.
What is the thermal resistance specification for the BZW04-94B?
The BZW04-94B has a junction-to-lead thermal resistance (RθJL) of 60 °C/W and a junction-to-ambient resistance (RθJA) of 100 °C/W when mounted on a printed circuit board with 10 mm lead lengths. These values inform thermal design margins during repetitive surge events and determine whether additional copper pour or airflow is needed to maintain TJ ≤ 175 °C.
BZW04-94B 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):
- 94V
- Voltage - Breakdown (Min):
- 105V
- Voltage - Clamping (Max) @ Ipp:
- 152V
- Current - Peak Pulse (10/1000µs):
- 2.6A
- 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)
BZW04-94B FAQ
1.How can I place an order for BZW04-94B through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-94B 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 BZW04-94B reliable?
The price and inventory of BZW04-94B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-94B is usually 5 days.
3.What payment methods are accepted for BZW04-94B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-94B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-94B?
BZW04-94B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-94B 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 BZW04-94B?
For technical support, including BZW04-94B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-94B requirements.
6.How does Aetrix verify that BZW04-94B is sourced from the original manufacturer or authorized distributors?
All BZW04-94B 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 BZW04-94B meets industry standards.
7.What is the process for return or replacement of BZW04-94B?
All BZW04-94B units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-94B, 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 BZW04-94B part is unused and in its original packaging.
Return procedure for BZW04-94B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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