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Taiwan Semiconductor Corporation P4KE170
- Part No.:
- P4KE170
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE170.pdf
- Description:
- 400W, 170V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,794
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Product details
Overview
P4KE170 from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode designed for primary-side overvoltage protection in power supplies, automotive electronics, and industrial control systems. It features a nominal breakdown voltage of 170 V, clamping voltage of 244 V at 1.7 A peak pulse current, and a working stand-off voltage of 138 V - enabling robust ESD and lightning surge immunity in DC bus lines and input stages.
For engineers reviewing the P4KE170 datasheet, P4KE170 pinout, P4KE170 application, or P4KE170 equivalent, key selection criteria include its DO-41 package compatibility, 175°C maximum junction temperature, low 1 μA reverse leakage at 138 V, and AEC-Q101 qualification option - critical for automotive-grade transient suppression where reliability under thermal stress and fast response (<1 ps) are mandatory.
Technical Context
The P4KE170 operates as a unidirectional avalanche diode with precise voltage thresholding defined by its 153–187 V breakdown range at 1 mA test current. Its clamping action limits transient energy to ≤244 V at 1.7 A (10/1000 μs waveform), delivering 400 W peak pulse power dissipation without degradation.
Thermal design relies on its 175°C max junction temperature and 1 W steady-state power rating at 75°C lead temperature. The device exhibits a +0.108 %/°C temperature coefficient of VBR, ensuring predictable voltage drift across operating ranges - essential for stable protection margins in wide-temperature environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR Min/Max | 153 V / 187 V at 1 mA - defines reliable turn-on threshold for overvoltage events above 138 V system operating voltage |
| VWM | 138 V - maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VC @ IPPM | 244 V at 1.7 A (10/1000 μs) - peak clamped voltage seen by protected circuit during worst-case surge |
| IPPM | 1.7 A - maximum non-repetitive surge current the device safely shunts without failure |
| PPK | 400 W - peak transient power handling capability per single 1 ms pulse |
| TJ Max | 175 °C - enables operation in under-hood automotive or high-ambient industrial environments |
| Leakage @ VWM | ≤1 μA - ensures minimal standby power loss and no interference with high-impedance sensing circuits |
Pinout & Package
Package: DO-204AL (DO-41) - axial-leaded, epoxy-molded case with tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side reference in unidirectional TVS configuration |
| Cathode | Avalanche breakdown terminal | Connected to protected line (e.g., DC input rail); clamps transients to anode when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 48 V DC lines without derating |
| Clamping voltage ≤244 V | Ensures downstream 300 V-rated MOSFETs and capacitors remain within safe operating area during transients |
| Response time <1.0 ps | Activates before nanosecond-scale ESD pulses (IEC 61000-4-2) propagate into IC inputs |
| AEC-Q101 qualified option | Validated for automotive powertrain and body electronics requiring zero defect reliability over 15-year service life |
| UL 94V-0 flammability rating | Prevents fire propagation in enclosed enclosures during catastrophic overvoltage fault conditions |
Applications
| Automotive Power Input Protection | Industrial DC Power Rail Clamping |
|---|---|
Use Scenario: 12 V/24 V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input to clamp spikes up to 120 V. Use Value: P4KE170's 244 V clamping voltage protects 300 V input-rated buck controllers while surviving repeated 100 V/100 ms load dump events. |
Use Scenario: 48 V telecom rectifier output subjected to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary-stage TVS on DC output bus to limit transient overvoltage before distribution to PoE injectors and baseband processors. Use Value: With 400 W rating and 175°C TJ, P4KE170 sustains multiple 10/1000 μs surges without thermal runaway in sealed outdoor cabinets. |
| LED Driver Overvoltage Suppression | Motor Drive Snubber Protection |
Use Scenario: Constant-current LED drivers in street lighting facing AC line transients coupled via EMI filters. IC Role / Device Role / Timing Role: TVS mounted across driver input terminals to absorb 6 kV ring waves (IEC 61000-4-12) before they reach PWM controller ICs. Use Value: 138 V VWM allows full 120 VAC RMS operation while 244 V VC prevents LED string overvoltage beyond 250 V absolute max rating. |
Use Scenario: H-bridge gate drivers in BLDC inverters subjected to inductive kickback from motor windings. IC Role / Device Role / Timing Role: Unidirectional TVS across DC bus to clamp flyback voltage spikes generated during MOSFET turn-off. Use Value: Fast <1 ps response captures sub-nanosecond switching transients, preventing gate oxide damage to 200 V-rated half-bridge drivers. |
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 | 162–179 V VBR range (tighter tolerance), 234 V clamping at 1.8 A, same DO-41 package | Slightly lower clamping voltage improves margin for 200 V-rated downstream components | Preferred where tighter VBR tolerance and reduced clamping are prioritized over cost |
| ON Semiconductor 1.5KE170A | Same 170 V nominal rating but 1.5 kW peak power (1.5KE series), larger DO-201AD package | Higher surge capacity suits infrequent but extreme lightning strikes; requires PCB layout change | Select when system-level surge testing exceeds 400 W requirements and board space permits larger footprint |
Compared with P4KE170, the P4KE170A offers improved VBR consistency and lower clamping, while the 1.5KE170A trades compact DO-41 packaging for higher 1.5 kW surge headroom - making P4KE170 optimal for space-constrained, cost-sensitive 400 W-class protection where AEC-Q101 compliance is required.
Availability
P4KE170 is available at Aetrix Electronics and suitable for automotive power modules, industrial DC power supplies, LED lighting drivers, and motor control systems requiring stable component supply with long-term lifecycle support.
Supply support for P4KE170 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, and rectifiers with global AEC-Q101 certification capabilities.
The P4KE series targets cost-effective, high-reliability transient suppression in automotive, industrial, and consumer power systems - emphasizing robust surge handling, tight parametric control, and RoHS/halogen-free compliance.
FAQ
What is the maximum clamping voltage of the P4KE170 under standard test conditions?
The P4KE170 has a maximum clamping voltage (VC) of 244 V when subjected to a 10/1000 μs waveform at 1.7 A peak pulse current. This value is measured per ANSI/IEEE C62.35 and represents the highest voltage the protected circuit will experience during a standardized surge event. The P4KE170 maintains this clamping performance across its specified operating temperature range and is validated for repeatable operation without parameter shift.
Is the P4KE170 suitable for automotive applications requiring AEC-Q101 qualification?
Yes - the P4KE170H variant (with "H" suffix) is explicitly AEC-Q101 qualified by Taiwan Semiconductor, covering stress tests including high-temperature operating life, temperature cycling, and ESD. The standard P4KE170 is not AEC-Q101 certified; only P4KE170H meets automotive-grade reliability requirements. For automotive power input protection, P4KE170H is the recommended version of P4KE170.
How does the P4KE170 compare to bidirectional TVS diodes like P4KE170CA?
The P4KE170 is unidirectional and intended for DC line protection with polarity-sensitive placement (cathode to protected line). In contrast, P4KE170CA is bidirectional and symmetric - suitable for AC signal lines or floating DC buses where polarity reversal may occur. The P4KE170 offers lower capacitance and faster response in DC applications, while P4KE170CA provides equal clamping in both directions but with slightly higher leakage above 10 V.
What is the reverse leakage current specification for P4KE170 at its working voltage?
The P4KE170 exhibits a maximum reverse leakage current (ID) of 1 μA when biased at its working stand-off voltage (VWM) of 138 V. This ultra-low leakage ensures minimal power loss in always-on systems and avoids false triggering in high-impedance monitoring circuits. The value is guaranteed at 25°C and remains ≤5 μA up to 125°C per TSC characterization data.
Can the P4KE170 be used in parallel to increase surge current handling?
No - the P4KE170 is not designed for parallel operation due to VBR mismatch (153–187 V range) causing current imbalance and thermal runaway. Parallel use would result in one device absorbing >80% of the surge, exceeding its 1.7 A rating. For higher current needs, select a single higher-rated device such as 1.5KE170A or use staged protection with upstream fusing - never parallel P4KE170 units.
P4KE170 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):
- 138V
- Voltage - Breakdown (Min):
- 153V
- Voltage - Clamping (Max) @ Ipp:
- 244V
- Current - Peak Pulse (10/1000µs):
- 1.7A
- 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)
P4KE170 FAQ
1.How can I place an order for P4KE170 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE170 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 P4KE170 reliable?
The price and inventory of P4KE170 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE170 is usually 5 days.
3.What payment methods are accepted for P4KE170?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE170 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE170?
P4KE170 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE170 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 P4KE170?
For technical support, including P4KE170 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE170 requirements.
6.How does Aetrix verify that P4KE170 is sourced from the original manufacturer or authorized distributors?
All P4KE170 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 P4KE170 meets industry standards.
7.What is the process for return or replacement of P4KE170?
All P4KE170 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE170, 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 P4KE170 part is unused and in its original packaging.
Return procedure for P4KE170:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE170 Tags
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