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Taiwan Semiconductor Corporation BZW04-94
- Part No.:
- BZW04-94
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-94.pdf
- Description:
- TVS DIODE 94VWM 152VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,430
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Product details
Overview
BZW04-94 from Taiwan Semiconductor is a unidirectional transient voltage suppressor diode (TVS) designed for primary overvoltage protection in DC power rails and signal lines. It features a 94.0 V working stand-off voltage (VWM), 105–116 V breakdown voltage (VBR) at 1 mA test current, 400 W peak pulse power (10/1000 µs), clamping voltage of 152 V at 2.6 A peak impulse current, and operates across –55 °C to +175 °C junction temperature range - deployed in automotive lighting control modules.
For engineers reviewing the BZW04-94 datasheet, BZW04-94 pinout, BZW04-94 application, or BZW04-94 equivalent, key selection criteria include clamping performance under 10/1000 µs surge, low leakage (<1 µA @ 94 V), DO-41 package compatibility with high-reliability PCB layouts, and AEC-Q101 qualification status for automotive-grade deployment.
Technical Context
The BZW04-94 operates as a silicon avalanche diode, leveraging controlled reverse-biased breakdown to clamp transient overvoltages before they reach downstream ICs. Its low dynamic impedance ensures stable clamping during fast-rising EFT or inductive-switching events, while its 60 °C/W junction-to-lead thermal resistance supports reliable power dissipation on standard copper pads.
Rated for 400 W non-repetitive peak pulse power per IEC 61000-4-5 and ANSI/IEEE C62.35, it delivers sub-nanosecond response time and maintains <1 µA reverse leakage above VWM - critical for low-power sensor interfaces and always-on automotive subsystems where quiescent current must remain minimal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 94.0 V - Maximum continuous DC operating voltage before conduction begins; defines safe operating margin for 96 V nominal systems. |
| VBR @ IT=1 mA | 105–116 V - Breakdown threshold tolerance band; ensures consistent clamping onset across production lots. |
| VC @ IPP=2.6 A | 152 V - Clamped voltage during 10/1000 µs surge; limits stress on protected 120 V-rated MOSFETs or microcontrollers. |
| PPK | 400 W - Peak pulse power handling per 10/1000 µs waveform; meets IEC 61000-4-5 Level 4 immunity requirements. |
| ID @ VWM | <1 µA - Reverse leakage at rated stand-off voltage; preserves battery life in always-on vehicle modules. |
| TJ max | +175 °C - Maximum junction temperature; enables placement near heat-generating components in engine bay applications. |
| RθJL | 60 °C/W - Junction-to-lead thermal resistance; allows direct solder-mount thermal path to PCB copper for sustained surge recovery. |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded case with cathode band marking for unidirectional polarity. Meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-side return path; completes clamping loop during transient events. |
| Cathode | Protected line input | Connected to supply rail or signal line being safeguarded; avalanche conduction initiates here during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option available | BZW04-94H variant meets automotive reliability stress testing for under-hood use. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during transients, reducing risk of latch-up in 3.3 V or 5 V logic interfaces. |
| 10/1000 µs surge rating | Validated for lightning-induced surges and load-dump events per ISO 7637-2 Pulse 5a. |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and EU Directive 2011/65/EU for environmentally constrained industrial deployments. |
| 0.300 g mass | Enables lightweight design in portable and aerospace-grade power management assemblies. |
Applications
| Automotive Lighting Control | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protects LED driver ICs from inductive kickback when switching 24 V solenoid loads in headlamp leveling systems. IC Role / Device Role: Primary overvoltage clamp on 24 V supply rail upstream of buck controller and gate drivers. Use Value: Limits transient voltage to ≤152 V during 2.6 A load dump, preventing damage to 150 V-rated MOSFETs and enabling single-stage protection architecture. |
Use Scenario: Shields 24 V digital input channels from EFT bursts in factory automation controllers exposed to relay coil switching noise. IC Role / Device Role: Front-end TVS on isolated input optocoupler supply rail. Use Value: Sub-1 µA leakage preserves input threshold accuracy; 152 V clamping prevents false triggering during 4 kV EFT (IEC 61000-4-4). |
| DC Power Supply Input Stage | Telecom Power Feeds |
Use Scenario: Guards AC/DC adapter output against surges induced by nearby motor drives in shared building wiring. IC Role / Device Role: Secondary-side surge suppression on regulated 48 V output bus feeding PoE injectors. Use Value: 400 W rating handles repetitive 10/1000 µs pulses without degradation; DO-41 footprint allows manual rework in field-serviceable units. |
Use Scenario: Safeguards remote radio unit (RRU) power inputs from induced lightning surges on outdoor telecom cables. IC Role / Device Role: First-line protection on -48 V DC feed before DC-DC converters and monitoring ICs. Use Value: 175 °C max junction temperature supports operation in sealed outdoor enclosures; 94 V VWM matches telecom nominal voltage derating margins. |
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 | DO-214AA package; 90 V VWM; 100 V VBR min; 600 W PPK; higher capacitance (~150 pF) | Higher surge rating but larger footprint; less suitable for space-constrained automotive PCBs | Prefer when >400 W surge margin is required and board area permits SMB package |
| P6KE91A | DO-15 package; 91 V VWM; 101 V VBR min; 600 W PPK; 100 °C/W RθJA | Lower thermal performance; not AEC-Q101 qualified; legacy industrial use only | Select only for cost-sensitive non-automotive applications where AEC-Q101 is not mandated |
Compared with SMBJ90A and P6KE91A, the BZW04-94 offers optimal balance of DO-41 manufacturability, AEC-Q101 readiness, and precise 94 V stand-off matching common 96 V battery systems - making it preferred for new automotive designs requiring validated reliability and compact through-hole integration.
Availability
BZW04-94 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, long-term lifecycle support, and traceable sourcing.
Supply support for BZW04-94 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 global automotive, industrial, and consumer markets since 1979.
The BZW04 series belongs to TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for robust transient suppression in harsh-environment automotive electronics - including body control modules, lighting systems, and power distribution units.
FAQ
What is the maximum clamping voltage of the BZW04-94 under standard surge conditions?
The BZW04-94 exhibits a maximum clamping voltage (VC) of 152 V when subjected to a 2.6 A peak impulse current with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable overvoltage limiting for downstream components such as 150 V-rated MOSFETs or automotive microcontrollers. The BZW04-94 maintains this clamping performance across its full operating temperature range of –55 °C to +175 °C.
Is the BZW04-94 suitable for automotive applications requiring AEC-Q101 qualification?
Yes - the BZW04-94H variant is explicitly AEC-Q101 qualified and listed in Taiwan Semiconductor's official automotive product documentation. While the base BZW04-94 part number does not carry the 'H' suffix, the underlying die and assembly process are identical; qualification applies to the same construction. For automotive production, specify BZW04-94H to ensure certified compliance and full PPAP documentation support.
What is the reverse leakage current specification for the BZW04-94 at its working stand-off voltage?
The BZW04-94 specifies a maximum reverse leakage current (ID) of 1 µA at its 94.0 V working stand-off voltage (VWM), tested at TA = 25 °C. This ultra-low leakage ensures minimal power loss in always-on circuits such as vehicle intrusion detection sensors or CAN node wake-up receivers. Leakage remains below 5 µA up to +125 °C ambient, supporting extended temperature operation without compromising system quiescent current budgets.
How does the DO-41 package of the BZW04-94 compare thermally to surface-mount alternatives?
The DO-41 package of the BZW04-94 provides a junction-to-lead thermal resistance (RθJL) of 60 °C/W, significantly lower than typical SMD packages like SMA or SMB (often >100 °C/W). When mounted on 5 × 5 mm copper pads per lead, it achieves efficient heat transfer directly into the PCB plane - enabling reliable 400 W surge handling without external heatsinking. This makes the BZW04-94 especially effective in through-hole power rail protection where thermal mass and mechanical robustness are prioritized.
Can the BZW04-94 be used in bidirectional configurations?
No - the BZW04-94 is a unidirectional TVS diode, intended for DC rail protection with defined polarity. For bidirectional transient suppression, the designated variant is BZW04-94B, which features symmetrical breakdown characteristics and no cathode marking. Using BZW04-94 in AC or floating signal paths risks asymmetric clamping and potential device failure; always select BZW04-94B for bidirectional applications such as RS-485 data lines or AC-coupled sensor interfaces.
BZW04-94 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):
- 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)
BZW04-94 FAQ
1.How can I place an order for BZW04-94 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-94 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 BZW04-94 reliable?
The price and inventory of BZW04-94 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-94 is usually 5 days.
3.What payment methods are accepted for BZW04-94?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-94 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-94?
BZW04-94 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-94 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 BZW04-94?
For technical support, including BZW04-94 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-94 requirements.
6.How does Aetrix verify that BZW04-94 is sourced from the original manufacturer or authorized distributors?
All BZW04-94 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 BZW04-94 meets industry standards.
7.What is the process for return or replacement of BZW04-94?
All BZW04-94 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-94, 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 BZW04-94 part is unused and in its original packaging.
Return procedure for BZW04-94:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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