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Taiwan Semiconductor Corporation BZW04-17
- Part No.:
- BZW04-17
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-17.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,394
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Product details
Overview
BZW04-17 from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 17.1 V working stand-off voltage (VWM), 19.0–21.0 V breakdown voltage (VBR) at 1 mA, 400 W peak pulse power (10/1000 µs), clamping voltage of 27.7 V at 14.5 A, and operates across –55 °C to +175 °C junction temperature range - deployed in automotive lighting control modules and industrial sensor interfaces.
For engineers reviewing the BZW04-17 datasheet, BZW04-17 pinout, BZW04-17 application, or BZW04-17 equivalent, key selection criteria include its DO-41 package compatibility, low leakage (<1 µA @ VWM), fast response time, AEC-Q101 qualification eligibility (via BZW04-17H variant), and precise clamping performance under IEC 61000-4-5 surge conditions.
Technical Context
The BZW04-17 is a silicon avalanche diode optimized for unidirectional clamping in high-energy transient environments. Its 400 W surge rating at 10/1000 µs waveform and 27.7 V clamping voltage at 14.5 A ensure reliable suppression of EFT and lightning-induced surges without latch-up or thermal runaway.
It exhibits a 0.090 %/°C temperature coefficient of VBR and junction-to-lead thermal resistance of 60 °C/W, enabling stable operation under sustained ambient temperatures up to 125 °C when mounted on 5 × 5 mm copper pads - critical for under-hood automotive electronics and industrial PLC I/O protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17.1 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 12 V systems. |
| VBR @ IT=1 mA | 19.0–21.0 V - guaranteed avalanche onset range; ensures consistent turn-on across production lots and temperature. |
| VC @ IPP=14.5 A | 27.7 V - maximum clamped voltage during 400 W surge; limits stress on downstream ICs like microcontrollers or CAN transceivers. |
| 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 - ultra-low reverse leakage; preserves battery life in always-on automotive modules and avoids false triggering. |
| TJ max | +175 °C - extended junction temperature rating supports placement near heat sources (e.g., power MOSFETs, motor drivers). |
| Package | DO-204AL (DO-41) - industry-standard axial leaded package with tin-plated leads, UL 94V-0 molding, and JESD201 Class 2 whisker resistance. |
Pinout & Package
DO-204AL (DO-41) package: axial-leaded, glass-passivated silicon junction, cathode band marked on one end. Leads are pure tin-plated, solderable per J-STD-002, with polarity indicated by cathode band for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential node; enables clamping when cathode voltage exceeds VBR relative to anode. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail); conducts avalanche current to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification option | BZW04-17H variant available - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing. |
| Low clamping ratio (VC/VBR) | ~1.42 - tight ratio between clamping and breakdown voltages minimizes overvoltage overshoot during fast transients. |
| High surge current capability | 14.5 A peak impulse current (IPP) - sustains repeated 400 W surges without degradation when derated per Fig.2. |
| Ultra-low leakage current | <1 µA @ 17.1 V - eliminates parasitic loading on low-power sensor bias networks and battery-backed circuits. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive - suitable for environmentally regulated industrial and automotive supply chains. |
Applications
| Automotive Lighting Control | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LED driver ICs and microcontrollers in headlamp control units subjected to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role: Primary clamping device on 12 V supply rail, placed upstream of DC-DC converters and gate drivers. Use Value: Clamps transients to ≤27.7 V while sustaining 400 W surges - prevents latch-up and permanent damage to sensitive 3.3 V logic. |
Use Scenario: Safeguarding 4–20 mA current-loop transmitters and analog front-ends in factory automation sensors exposed to EFT bursts (IEC 61000-4-4). IC Role / Device Role: Bidirectional-capable (via BZW04-17B variant) or unidirectional rail clamp on signal/power inputs. Use Value: Sub-1 µA leakage avoids offset errors in precision current sensing; DO-41 footprint allows easy retrofit into legacy PCB layouts. |
| Power Supply Input Stage | Motor Drive Gate Driver Protection |
Use Scenario: Front-end surge suppression for AC/DC adapters and DC input stages in medical auxiliary power supplies. IC Role / Device Role: First-line defense against line-side surges (IEC 61000-4-5) before primary switching FETs and controllers. Use Value: 175 °C TJ max and 60 °C/W RθJL enable direct mounting near heatsinks - reduces thermal derating penalties in compact enclosures. |
Use Scenario: Protecting high-side/low-side gate drivers in BLDC motor inverters from inductive kickback during PWM switching. IC Role / Device Role: Clamp across gate-source or drain-source nodes to limit dv/dt-induced Miller turn-on and voltage spikes. Use Value: Fast response time and low impedance suppress >100 V/ns transients before driver ICs exceed absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17A | DO-214AA (SMB) package; 17 V VWM, 27.6 V VC @ 14.3 A; 600 W PPK rating. | Surface-mount only; higher surge rating but larger footprint and different thermal path. | Prefer SMBJ17A for new SMT designs requiring higher surge margin; BZW04-17 remains optimal for through-hole cost-sensitive or legacy-replacement use. |
| P6KE18A | DO-15 package; 18 V VWM, 27.7 V VC @ 14.5 A; 600 W PPK; wider VBR tolerance (19.0–23.3 V). | Higher leakage (~5 µA), no AEC-Q101 option, older platform with less stringent halogen-free compliance. | Choose P6KE18A only if DO-15 footprint is fixed and AEC-Q101 is not required; BZW04-17 offers tighter VBR, lower ID, and modern environmental specs. |
Compared with SMBJ17A and P6KE18A, the BZW04-17 delivers superior leakage performance (<1 µA), AEC-Q101 qualification path, halogen-free construction, and tighter VBR tolerance - making it the preferred choice for automotive and high-reliability industrial applications where long-term stability and regulatory compliance are mandatory.
Availability
BZW04-17 is available at Aetrix Electronics and suitable for automotive lighting control, industrial sensor interface protection, and power supply input stage applications requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for BZW04-17 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 MOSFETs - headquartered in Hsinchu, Taiwan, with global distribution and AEC-Q101-qualified production lines.
The BZW04 series was engineered specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing tight parametric control, extended temperature operation, and compliance with evolving environmental standards.
FAQ
What is the maximum clamping voltage of the BZW04-17 under standard surge conditions?
The BZW04-17 has a maximum clamping voltage (VC) of 27.7 V when subjected to a 14.5 A peak impulse current (IPP), measured using the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and ensures downstream ICs remain within safe voltage limits during IEC 61000-4-5-compliant surges. The BZW04-17 maintains this clamping performance with minimal variation due to its low dynamic impedance and tight VBR tolerance.
Is the BZW04-17 suitable for automotive applications?
Yes - the BZW04-17 is qualified for automotive use via its BZW04-17H variant, which meets AEC-Q101 stress test requirements including HTGB, TCT, and ESD. Its –55 °C to +175 °C operating range, low leakage, and robust 400 W surge capability make it appropriate for engine control units, body electronics, and lighting modules. While the base BZW04-17 is not AEC-Q101 certified, its design foundation and process controls align with automotive-grade manufacturing practices.
What is the difference between BZW04-17 and BZW04-17B?
The BZW04-17 is unidirectional, with cathode marking indicating polarity for DC rail protection; the BZW04-17B is its bidirectional counterpart, featuring symmetrical breakdown in both directions and no polarity marking. Both share identical VWM (17.1 V), VBR (19.0–21.0 V), and VC (27.7 V) specs, but BZW04-17B is used where AC-coupled signals or dual-polarity transients require symmetric clamping - such as in RS-485 data lines or transformer-coupled power supplies.
Does the BZW04-17 require a heatsink for 400 W surge handling?
No - the 400 W rating applies to non-repetitive 10/1000 µs pulses, not steady-state dissipation. The BZW04-17's 1 W steady-state power rating (PD) and 100 °C/W junction-to-ambient thermal resistance mean it relies on PCB copper area (e.g., 5 × 5 mm pads) for transient energy dissipation, not external heatsinks. For repetitive surges, derating per Figure 2 in the datasheet is required, and thermal design must prioritize low-inductance layout and adequate copper pour rather than mechanical heatsinking.
Can the BZW04-17 replace older P6KE series TVS diodes in existing designs?
Yes - the BZW04-17 is a direct form-fit replacement for P6KE17A/P6KE18A in DO-41 sockets, sharing identical package dimensions, lead spacing, and polarity marking. It improves upon legacy P6KE parts with tighter VBR tolerance (±5% vs ±10%), lower leakage (<1 µA vs ~5 µA), halogen-free construction, and AEC-Q101 qualification path. No PCB changes are needed, but verify clamping voltage alignment with downstream IC absolute maximum ratings in the final design.
BZW04-17 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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 14.5A
- 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)
BZW04-17 FAQ
1.How can I place an order for BZW04-17 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-17 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 BZW04-17 reliable?
The price and inventory of BZW04-17 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-17 is usually 5 days.
3.What payment methods are accepted for BZW04-17?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-17 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-17?
BZW04-17 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-17 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 BZW04-17?
For technical support, including BZW04-17 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-17 requirements.
6.How does Aetrix verify that BZW04-17 is sourced from the original manufacturer or authorized distributors?
All BZW04-17 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 BZW04-17 meets industry standards.
7.What is the process for return or replacement of BZW04-17?
All BZW04-17 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-17, 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 BZW04-17 part is unused and in its original packaging.
Return procedure for BZW04-17:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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