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Taiwan Semiconductor Corporation BZW04-5V8B
- Part No.:
- BZW04-5V8B
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-5V8B.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,228
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Product details
Overview
BZW04-5V8B from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor diode with a 5.8V working stand-off voltage, 6.45–7.14V breakdown voltage at 10mA, and 10.5V clamping voltage at 38A peak pulse current-designed for ESD and inductive switching surge protection in automotive lighting and industrial control circuits.
For engineers reviewing the BZW04-5V8B datasheet, BZW04-5V8B pinout, BZW04-5V8B application, or BZW04-5V8B equivalent, this page delivers verified electrical parameters, DO-41 package details, AEC-Q101 qualification status, thermal resistance values, and real-world protection use cases aligned to IEC 61000-4-2/4-4/4-5 standards.
Technical Context
The BZW04-5V8B operates as a unidirectional avalanche diode with low dynamic impedance (typical <1Ω during clamping), enabling rapid voltage clamping within nanoseconds of transient onset. Its 10.5V clamping voltage at 38A ensures downstream ICs remain below absolute maximum ratings during 10/1000μs surges.
It features a junction-to-lead thermal resistance of 60°C/W and operates across –55°C to +175°C, supporting under-hood automotive environments. Reverse leakage is ≤1000μA at 5.8V, confirming stable stand-off behavior prior to conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.8 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin for 5V logic rails. |
| VBR @ IT=10mA | 6.45–7.14 V - Breakdown threshold range; guarantees reliable triggering above nominal supply while avoiding false trips. |
| VC @ IPP=38A | 10.5 V - Clamped voltage during 400W surge; limits stress on protected 5V microcontrollers or transceivers. |
| PPK | 400 W - Peak pulse power rating per 10/1000μs waveform; meets IEC 61000-4-5 Level 4 immunity requirements. |
| ID @ VWM | ≤1000 μA - Reverse leakage at stand-off voltage; ensures minimal quiescent power loss in battery-powered systems. |
| TJ max | +175 °C - Maximum junction temperature; supports placement near heat sources in engine control units. |
| RθJL | 60 °C/W - Junction-to-lead thermal resistance; enables effective heat transfer to PCB copper pads without heatsinks. |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded case with cathode band marking. RoHS-compliant, halogen-free, UL 94V-0 rated compound. Pure tin-plated leads, JESD 201 Class 2 whisker tested.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or low-side return path in unidirectional TVS configuration. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 5V rail); conducts avalanche current during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22-A114. |
| 400W surge capability | Withstands 10/1000μs transients up to 38A without degradation-enables single-device protection for CAN/LIN bus nodes. |
| Low clamping ratio (VC/VBR ≈ 1.55) | Minimizes voltage overshoot during fast transients, reducing risk of latch-up in adjacent CMOS ICs. |
| Fast response time | Sub-nanosecond turn-on ensures suppression before sensitive circuitry experiences damaging overvoltage. |
| Low IR (<1μA above 10V) | Eliminates false triggering and standby current concerns in high-impedance sensor interfaces. |
Applications
| Automotive LED Headlamp Driver Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects LED driver ICs from load-dump and inductive kickback surges generated by relay-controlled headlamp circuits. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 5V supply rail and ground, clamping transients before they reach buck controller and gate drivers. Use Value: Maintains system uptime by preventing repeated IC failures during vehicle ignition cycles and alternator regulation spikes. | Use Scenario: Shields 24V digital input optocouplers from EFT bursts and field-wiring induced transients in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff diode connected across input terminals, absorbing 4kV EFT pulses per IEC 61000-4-4 without signal distortion. Use Value: Eliminates spurious input toggling and firmware resets caused by transient coupling into isolated inputs. |
| USB-C Power Delivery Port Protection | Smart Meter Communication Interface Protection |
Use Scenario: Safeguards USB-C PD controller and level-shifters against ESD events during hot-plug insertion in automotive infotainment systems. IC Role / Device Role / Timing Role: Unidirectional clamp on VBUS line, triggered only during overvoltage-preserves normal 5–20V PD negotiation signaling. Use Value: Prevents permanent damage to USB-C PHYs while maintaining full USB-IF compliance for plug durability. | Use Scenario: Protects RS-485 transceivers and microcontroller GPIOs from lightning-induced surges on utility meter data lines. IC Role / Device Role / Timing Role: Bidirectional-capable variant (BZW04-5V8B supports uni/bi configurations) placed across differential pair and ground reference. Use Value: Ensures AMI/PLC communication continuity during outdoor grid transients without requiring external biasing networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ5.0A | Same DO-214AA package; 6.4V VBR min, 9.2V VC @ 43.5A; lower RθJA (50°C/W) but no AEC-Q101 option. | Preferred for cost-sensitive consumer electronics where automotive qualification is unnecessary. | Select SMBJ5.0A when board space allows SMC/SMB footprint and AEC-Q101 is not mandated. |
| P6KE6.8A | DO-15 package; 7.14V VBR min, 10.5V VC @ 38.2A; higher leakage (5000μA @ 5.5V); non-AEC-Q101. | Suitable for legacy industrial designs with existing DO-15 footprints and relaxed leakage budgets. | Choose P6KE6.8A only if DO-15 compatibility is required and thermal derating margins exceed 20%. |
Compared with SMBJ5.0A and P6KE6.8A, the BZW04-5V8B provides AEC-Q101 validation, tighter VBR tolerance (±5%), and lower leakage at VWM-making it the sole choice for new automotive designs requiring zero-defect reliability in harsh environments.
Availability
BZW04-5V8B is available at Aetrix Electronics and suitable for automotive lighting modules, industrial PLC input stages, and USB-C power delivery protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZW04-5V8B 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 computing markets since 1979.
The BZW04 series was engineered specifically for high-reliability transient suppression in automotive subsystems-emphasizing AEC-Q101 compliance, wide temperature operation, and robust surge handling in compact DO-41 packaging.
FAQ
What is the polarity configuration of the BZW04-5V8B?
The BZW04-5V8B is a unidirectional transient voltage suppressor diode, featuring a cathode band marking on the DO-41 package. It conducts in reverse bias during overvoltage events and blocks forward current like a standard rectifier diode. This polarity enables precise clamping on positive-going transients relative to ground-critical for protecting 5V logic rails and microcontroller I/O pins in automotive ECUs where ground-referenced surges dominate.
Is the BZW04-5V8B AEC-Q101 qualified?
Yes, the BZW04-5V8B is AEC-Q101 qualified. The "H" suffix in the ordering code (e.g., BZW04-5V8BH) denotes AEC-Q101 qualification, and the BZW04-5V8B part number itself is explicitly listed in TSC's AEC-Q101 certified product documentation. Testing includes temperature cycling, high-temperature reverse bias, and ESD per JESD22-A114, ensuring suitability for under-hood automotive applications.
What is the maximum clamping voltage of the BZW04-5V8B at its rated peak pulse current?
The maximum clamping voltage of the BZW04-5V8B is 10.5 V at a peak pulse current (IPP) of 38 A, measured using the standard 10/1000 μs double-exponential waveform. This value is guaranteed across the full operating temperature range and ensures protected circuits remain within safe voltage limits during worst-case surge events such as load dump or inductive switching.
Can the BZW04-5V8B be used in bidirectional configurations?
No-the BZW04-5V8B is specified and characterized as a unidirectional device. While the BZW04 series includes bidirectional variants (e.g., BZW04-5V8), the "B" suffix in BZW04-5V8B does not indicate bidirectionality; rather, it denotes the standard commercial version within the unidirectional family. For bidirectional protection, select BZW04-5V8 (no "B") or confirm device marking and datasheet section "Bidirectional Types" before implementation.
What is the thermal resistance from junction to ambient for the BZW04-5V8B on a standard PCB?
The junction-to-ambient thermal resistance (RθJA) of the BZW04-5V8B is 100°C/W when mounted on a printed circuit board with 10 mm lead length, per TSC datasheet specifications. This value assumes standard FR-4 substrate with no additional copper pour; adding 5×5 mm copper pads per lead reduces RθJA significantly and improves surge endurance-especially important in sustained transient environments like motor drive feedback loops.
BZW04-5V8B 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):
- 5.8V
- Voltage - Breakdown (Min):
- 6.45V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 38A
- 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)
BZW04-5V8B FAQ
1.How can I place an order for BZW04-5V8B through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-5V8B 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 BZW04-5V8B reliable?
The price and inventory of BZW04-5V8B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-5V8B is usually 5 days.
3.What payment methods are accepted for BZW04-5V8B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-5V8B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-5V8B?
BZW04-5V8B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-5V8B 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 BZW04-5V8B?
For technical support, including BZW04-5V8B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-5V8B requirements.
6.How does Aetrix verify that BZW04-5V8B is sourced from the original manufacturer or authorized distributors?
All BZW04-5V8B 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 BZW04-5V8B meets industry standards.
7.What is the process for return or replacement of BZW04-5V8B?
All BZW04-5V8B units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-5V8B, 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 BZW04-5V8B part is unused and in its original packaging.
Return procedure for BZW04-5V8B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-5V8B Tags
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