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Taiwan Semiconductor Corporation BZW04-128
- Part No.:
- BZW04-128
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-128.pdf
- Description:
- TVS DIODE 128VWM 207VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,412
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Product details
Overview
BZW04-128 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 128 V working stand-off voltage (VWM), 143–158 V breakdown voltage (VBR) at 1 mA, 2.0 A peak pulse current (IPP), 207 V clamping voltage (VC) at IPP, and 400 W peak pulse power rating at 10/1000 µs waveform - deployed in automotive lighting control and industrial sensor interface circuits.
For engineers reviewing the BZW04-128 datasheet, BZW04-128 pinout, BZW04-128 application, or BZW04-128 equivalent, key selection criteria include verified clamping performance under 10/1000 µs transients, DO-41 package thermal derating behavior, unidirectional polarity marking, and AEC-Q101 qualification status for automotive-grade reliability validation.
Technical Context
The BZW04-128 operates as a silicon avalanche diode with sharp reverse-breakdown characteristics, enabling sub-nanosecond response to ESD and electrical fast transients. Its low dynamic impedance ensures stable clamping during 400 W surges, while the 0.108 %/°C VBR temperature coefficient supports predictable voltage margining across –55 °C to +175 °C junction operation.
Designed for single-polarity DC protection, it exhibits <1 µA reverse leakage at 128 V and maintains clamping integrity up to 207 V at 2.0 A impulse - validated per ANSI/IEEE C62.35 standards. The device uses pure tin-plated leads compliant with J-STD-002 and meets UL 94V-0 flammability requirements in its DO-204AL molded package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 128 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR @ 1 mA | 143–158 V - guaranteed avalanche onset range defining minimum overvoltage threshold |
| VC @ IPP | 207 V - clamped voltage at 2.0 A peak pulse, limiting downstream stress during surge events |
| PPK | 400 W - peak pulse power handling at 10/1000 µs waveform, critical for IEC 61000-4-5 compliance |
| TJ max | +175 °C - maximum junction temperature enabling use in under-hood automotive environments |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on PCB, guiding heatsinking and layout decisions |
| ID @ VWM | 1 µA - reverse leakage at rated stand-off, minimizing 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. Dimensions conform to JEDEC DO-41 standard; weight ≈ 0.300 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or lowest potential node during TVS operation |
| Cathode | High-side surge input terminal | Connected to protected line; avalanche conduction occurs from cathode to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant available | Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD |
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 3/4 surges without external series impedance |
| Clamping voltage ≤ 207 V at 2.0 A | Ensures protected ICs experience no more than 207 V during worst-case transient, preserving 200 V+ system margins |
| Reverse leakage ≤ 1 µA at 128 V | Minimizes quiescent current draw in always-on 12 V/24 V vehicle subsystems |
| DO-41 package with UL 94V-0 molding | Supports manual and automated through-hole assembly while meeting flame-retardant safety standards |
Applications
| Automotive LED Headlamp Driver Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects MOSFET gate drivers and current-sense amplifiers in 12 V/24 V LED headlamp modules from load-dump and inductive switching transients. IC Role / Device Role: Unidirectional TVS placed between supply rail and ground, clamping transients before they reach sensitive analog front-end components. Use Value: Maintains system uptime by preventing latch-up or permanent damage during ISO 7637-2 Pulse 5a (load dump) events up to 120 V. | Use Scenario: Shields 24 V digital input channels of programmable logic controllers from field-wiring induced surges and EFT bursts. IC Role / Device Role: Standoff-rated TVS on each input line, absorbing fast transients before reaching optocoupler or Schmitt-trigger input stages. Use Value: Enables reliable operation in factory-floor environments where >1 kV EFT immunity (IEC 61000-4-4) is required without adding RC filters. |
| DC Power Supply Rail Protection | ESD-Sensitive Sensor Interface Protection |
Use Scenario: Installed on 48 V telecom or industrial DC distribution rails to suppress coupling from adjacent switching converters or relay coils. IC Role / Device Role: Primary overvoltage clamp on main power bus, coordinated with upstream fuses or poly-switches for fault containment. Use Value: Limits rail overshoot to ≤207 V during 400 W surges, preventing overvoltage shutdown or capacitor degradation in downstream DC-DC stages. | Use Scenario: Placed at the connector entry point of RS-485 or CAN transceivers interfacing with outdoor environmental sensors. IC Role / Device Role: First-line defense against human-body-model (HBM) ESD and cable discharge events entering via shielded twisted pair. Use Value: Clamps 8 kV contact ESD pulses within nanoseconds while adding <1 pF parasitic capacitance, preserving signal integrity up to 10 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120A | DO-214AA package, 120 V VWM, 133–147 V VBR, 200 W PPK, lower IPP (13.7 A) | Lower power rating limits use to lighter-duty 10/1000 µs surges; surface-mount only | Select when board space is constrained and surge energy is ≤200 W |
| P6KE130A | DO-15 package, 130 V VWM, 144–159 V VBR, 600 W PPK, higher VC (219 V), larger RθJA (125 °C/W) | Higher clamping voltage increases risk to 200 V-rated ICs; requires larger copper area for thermal management | Select when higher peak power is needed but thermal design accommodates higher RθJA |
Compared with SMBJ120A and P6KE130A, the BZW04-128 delivers balanced 400 W surge capability in a through-hole DO-41 package with tighter clamping (207 V) and lower thermal resistance (100 °C/W), making it optimal for cost-sensitive, medium-energy automotive and industrial protection where manual assembly or legacy footprint compatibility matters.
Availability
BZW04-128 is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC input protection, and DC power rail stabilization requiring stable component supply, long-term lifecycle support, and AEC-Q101-qualified variants.
Supply support for BZW04-128 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 - headquartered in Hsinchu, Taiwan, with global distribution and AEC-Q101 certification capabilities.
The BZW04 series was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing robust DO-41 packaging, tight VBR tolerances, and validated surge endurance per ISO 7637 and IEC 61000-4-x standards.
FAQ
What is the clamping voltage of the BZW04-128 under a 2.0 A transient?
The BZW04-128 has a maximum clamping voltage (VC) of 207 V when subjected to a 2.0 A peak pulse current (IPP) under the standardized 10/1000 µs waveform. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during surge events. The BZW04-128 maintains this clamping performance consistently across its specified operating temperature range, ensuring predictable protection behavior in real-world conditions.
Is the BZW04-128 unidirectional or bidirectional?
The BZW04-128 is a unidirectional TVS diode, indicated by its part number suffix absence of "B" (which denotes bidirectional variants like BZW04-128B). It conducts only in reverse bias above VBR and must be installed with correct polarity - cathode toward the protected line and anode to ground. The BZW04-128 does not conduct in forward bias beyond typical diode drop, making it unsuitable for AC line protection without external rectification.
Does the BZW04-128 meet AEC-Q101 qualification?
The base BZW04-128 is not automatically AEC-Q101 qualified; qualification applies only to variants marked with the "H" suffix (e.g., BZW04-128H). These AEC-Q101-compliant versions undergo extended stress testing including temperature cycling, high-temperature reverse bias, and ESD per automotive reliability standards. Always verify the full ordering code - BZW04-128H - when automotive-grade qualification is required for the BZW04-128.
What is the thermal resistance of the BZW04-128 in standard PCB mounting?
The BZW04-128 has a junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on a printed circuit board with 10 mm lead lengths, per manufacturer characterization. This value assumes standard FR-4 substrate and minimal copper pour; actual thermal performance improves with added copper area or thermal vias. For sustained power dissipation, the steady-state limit remains 1 W at TL = 75°C, governed by RθJL = 60 °C/W to the lead.
How does the BZW04-128 compare to the P6KE130A in terms of surge handling?
The BZW04-128 offers 400 W peak pulse power at 10/1000 µs versus 600 W for the P6KE130A, but achieves lower clamping voltage (207 V vs. 219 V) and better thermal resistance (100 vs. 125 °C/W). While the P6KE130A handles higher single-event energy, the BZW04-128 provides tighter voltage control and more efficient heat dissipation in compact layouts - making the BZW04-128 preferable where clamping precision and thermal margin outweigh raw power rating.
BZW04-128 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):
- 128V
- Voltage - Breakdown (Min):
- 143V
- Voltage - Clamping (Max) @ Ipp:
- 207V
- Current - Peak Pulse (10/1000µs):
- 2A
- 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)
BZW04-128 FAQ
1.How can I place an order for BZW04-128 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-128 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 BZW04-128 reliable?
The price and inventory of BZW04-128 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-128 is usually 5 days.
3.What payment methods are accepted for BZW04-128?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-128 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-128?
BZW04-128 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-128 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 BZW04-128?
For technical support, including BZW04-128 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-128 requirements.
6.How does Aetrix verify that BZW04-128 is sourced from the original manufacturer or authorized distributors?
All BZW04-128 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 BZW04-128 meets industry standards.
7.What is the process for return or replacement of BZW04-128?
All BZW04-128 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-128, 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 BZW04-128 part is unused and in its original packaging.
Return procedure for BZW04-128:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-128 Tags
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