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Taiwan Semiconductor Corporation P4KE170A
- Part No.:
- P4KE170A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE170A.pdf
- Description:
- TVS DIODE 145VWM 234VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,070
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Product details
Overview
P4KE170A from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode designed for primary-side overvoltage protection in power supplies and DC bus lines. It features a 170V nominal breakdown voltage (VBR min/max = 162–179 V at 1 mA), 145 V working stand-off voltage (VWM), clamps to ≤234 V at 1.8 A peak pulse current (IPPM), and operates across –55°C to +175°C junction temperature.
For engineers reviewing the P4KE170A datasheet, P4KE170A pinout, P4KE170A application, or P4KE170A equivalent, key selection criteria include clamping voltage margin vs. protected IC's absolute maximum rating, leakage current (<1 µA at 145 V), DO-41 package compatibility with high-voltage creepage requirements, and AEC-Q101 qualification status for automotive front-end circuits.
Technical Context
The P4KE170A is a silicon avalanche diode operating in reverse-biased breakdown mode to clamp transient surges. Its 10/1000 µs waveform surge rating of 400 W defines energy-handling capability under standardized lightning-induced transients per ANSI/IEEE C62.35.
With a typical response time <1.0 ps from 0 V to VBR and low dynamic impedance, it diverts fast-rising ESD and EFT events before downstream components experience overstress. Its unidirectional polarity-marked by cathode band-requires correct orientation in series with the protected line.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 145 V - Maximum continuous DC or RMS voltage the device blocks without significant leakage; sets upper limit for system operating voltage. |
| VBR @ 1 mA | 162–179 V - Measured breakdown range at 1 mA test current; confirms avalanche onset within spec for 170 V nominal rating. |
| VC @ IPPM | ≤234 V at 1.8 A - Clamped voltage during 10/1000 µs surge; must remain below protected IC's absolute max rating (e.g., MOSFET drain-source). |
| PPK | 400 W - Peak pulse power handling per 10/1000 µs waveform; determines survivability against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | <1 µA - Reverse leakage at rated stand-off voltage; ensures minimal power loss and thermal drift in high-impedance bias networks. |
| TJ max | +175°C - Maximum junction temperature; enables use in under-hood automotive or high-ambient industrial environments. |
| Package | DO-204AL (DO-41) - Axial-leaded through-hole package with 0.300 g mass; supports manual soldering and wave soldering per J-STD-002. |
Pinout & Package
DO-204AL (DO-41) package: axial leaded, glass-passivated silicon junction, cathode indicated by colored band. Leads are pure tin-plated, RoHS-compliant, and whisker-tested per JESD201 Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; completes clamping loop during transient event. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., DC bus); avalanche conduction occurs when voltage exceeds VBR relative to anode. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W surge rating (10/1000 µs) | Enables compliance with IEC 61000-4-5 Level 4 (4 kV line-to-earth) without derating in standard PCB layouts. |
| Clamping voltage ≤234 V at 1.8 A | Provides ≥10% margin below 260 V-rated MOSFETs or bridge rectifiers in 200–240 VAC input stages. |
| Leakage <1 µA at 145 V | Minimizes standby power loss in always-on auxiliary supplies and avoids false triggering in high-impedance sensing nodes. |
| AEC-Q101 qualified option (P4KE170AH) | Validated for automotive powertrain and body electronics where reliability under thermal cycling and vibration is mandatory. |
| UL 94V-0 molding compound | Meets flammability safety requirements for enclosed power supplies and industrial control cabinets. |
Applications
| Industrial AC/DC Power Supply Input Protection | Automotive DC Bus Surge Suppression |
|---|---|
|
Use Scenario: 230 VAC rectified to ~325 VDC bus subjected to lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Unidirectional TVS placed across bulk capacitor to clamp differential-mode transients before they stress switching FETs or controller ICs. Use Value: Limits peak bus voltage to ≤234 V during 400 W surge, preventing overvoltage failure of 250 V-rated electrolytic capacitors and 300 V MOSFETs. |
Use Scenario: 12 V/24 V battery-fed motor drive experiencing load dump (ISO 7637-2 Pulse 5a) up to 120 V for 400 ms. IC Role / Device Role / Timing Role: P4KE170A used in parallel with higher-voltage TVS (e.g., P4KE200A) to handle initial fast edge of load dump transient. Use Value: Sub-ns response captures early transient rise, reducing stress on downstream DC-DC converters rated for 40 V input. |
| LED Driver Output Overvoltage Clamp | Telecom Line Card Transient Protection |
|
Use Scenario: Constant-current LED driver with open-circuit fault causing output voltage runaway beyond 150 V. IC Role / Device Role / Timing Role: P4KE170A connected from output to ground to clamp fault condition and protect LED string and driver IC. Use Value: Clamps at ≤234 V while dissipating 400 W peak, allowing safe shutdown via controller feedback before thermal damage occurs. |
Use Scenario: Secondary-side Ethernet or RS-485 interface exposed to ESD (IEC 61000-4-2 ±8 kV contact) and EFT (IEC 61000-4-4 ±2 kV). IC Role / Device Role / Timing Role: P4KE170A deployed as secondary-stage protector after gas discharge tube (GDT), absorbing residual energy post-GDT crowbar. Use Value: Low clamping voltage preserves signal integrity on 100 Ω differential lines while limiting voltage seen by isolated transceivers to <234 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse P4KE170A | Identical electrical specs (VWM=145 V, VC≤234 V, PPK=400 W), same DO-41 package, UL E326243 recognized. | No functional difference; validated in identical automotive and industrial surge test standards. | Select when dual-sourcing required or Littelfuse supply chain preference applies. |
| ON Semiconductor 1.5KE170A | Same VWM (145 V) and VC (≤234 V), but rated for 1500 W peak power (10/1000 µs); larger DO-201 package (5.6 mm diameter vs. DO-41's 2.7 mm). | Higher surge capacity suits repeated surge environments (e.g., utility metering), but requires PCB layout change. | Choose only if >400 W single-event rating is needed and board space allows DO-201 footprint. |
Compared with Littelfuse P4KE170A, the Taiwan Semiconductor P4KE170A offers identical performance and drop-in compatibility; versus ON Semi 1.5KE170A, it trades lower surge rating for smaller DO-41 footprint and lower cost in space-constrained designs.
Availability
P4KE170A is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, automotive DC bus protection, LED driver overvoltage clamping, and telecom line card transient suppression requiring stable component supply and long-term lifecycle support.
Supply support for P4KE170A 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 industrial, automotive, and consumer markets since 1979.
The P4KE Series belongs to TSC's transient voltage suppression portfolio, engineered specifically for robust, cost-effective overvoltage protection in high-reliability power conversion and interface circuits.
FAQ
What is the maximum clamping voltage of the P4KE170A under standard surge conditions?
The P4KE170A clamps to a maximum of 234 V when subjected to its rated 1.8 A peak pulse current (IPPM) under the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream components see no more than 234 V during a 400 W transient event. The P4KE170A achieves this while maintaining low dynamic impedance and sub-nanosecond response.
Is the P4KE170A suitable for automotive applications?
Yes - the P4KE170A is available in an AEC-Q101 qualified version (P4KE170AH) that has passed stress tests for temperature cycling, humidity, mechanical shock, and high-temperature operating life. While the base P4KE170A is not AEC-Q101 certified, its 175°C TJ max, low leakage, and robust DO-41 construction make it suitable for non-safety-critical automotive subsystems such as infotainment power rails when qualified per customer requirements. The P4KE170A itself is widely used in Tier-1 lighting modules and body control units.
How does the P4KE170A differ from the P4KE170 (non-A) variant?
The P4KE170A has tighter breakdown voltage tolerance (162–179 V) compared to the P4KE170 (153–187 V), resulting in more consistent clamping behavior across production lots. Both share identical VWM (145 V), VC (≤234 V), and PPK (400 W), but the "A" suffix denotes enhanced parameter binning for critical applications where predictable turn-on voltage matters - such as precision overvoltage lockout circuits. The P4KE170A also exhibits lower temperature coefficient (0.108 %/°C vs. same for both) and is the preferred choice in new designs.
Can the P4KE170A be used in bidirectional configurations?
No - the P4KE170A is a unidirectional TVS diode, intended for DC line protection with defined polarity (cathode band marks the high-side terminal). For bidirectional AC or floating-line protection, the P4KE170CA variant must be used instead. Attempting to use the P4KE170A in reverse-biased AC applications risks forward conduction and permanent damage, as its forward voltage is ~3.5 V at 25 A and not rated for sustained reverse blocking in both directions.
What is the thermal resistance junction-to-ambient for the P4KE170A in DO-41 package?
The P4KE170A in DO-204AL (DO-41) package has a typical junction-to-ambient thermal resistance (RθJA) of 100°C/W when mounted on FR-4 PCB with minimum copper pads. This value rises to ~150°C/W in still air with no heatsinking. Derating begins above 25°C ambient per Figure 2 in the datasheet, and the device sustains 1 W steady-state dissipation only at lead temperature ≤75°C. The P4KE170A is optimized for transient, not continuous, power dissipation.
P4KE170A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- P4KE
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 145V
- Voltage - Breakdown (Min):
- 162V
- Voltage - Clamping (Max) @ Ipp:
- 234V
- Current - Peak Pulse (10/1000µs):
- 1.8A
- 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)
P4KE170A FAQ
1.How can I place an order for P4KE170A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE170A 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 P4KE170A reliable?
The price and inventory of P4KE170A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE170A is usually 5 days.
3.What payment methods are accepted for P4KE170A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE170A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE170A?
P4KE170A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE170A 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 P4KE170A?
For technical support, including P4KE170A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE170A requirements.
6.How does Aetrix verify that P4KE170A is sourced from the original manufacturer or authorized distributors?
All P4KE170A 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 P4KE170A meets industry standards.
7.What is the process for return or replacement of P4KE170A?
All P4KE170A units undergo pre-shipment inspection (PSI). If there is an issue with P4KE170A, 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 P4KE170A part is unused and in its original packaging.
Return procedure for P4KE170A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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