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Taiwan Semiconductor Corporation P4KE170C
- Part No.:
- P4KE170C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE170C.pdf
- Description:
- 400W, 170V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,314
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Product details
Overview
P4KE170C from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power rails and signal lines. It features a nominal breakdown voltage of 170V, clamping voltage of 244V at 1.7A peak pulse current, and a working stand-off voltage of 138V - enabling robust surge immunity per IEC 61000-4-5 (10/1000μs waveform) in industrial power supplies and automotive ECUs.
For engineers reviewing the P4KE170C datasheet, P4KE170C pinout, P4KE170C application, or P4KE170C equivalent, key selection criteria include its DO-204AL (DO-41) package compatibility, 175°C maximum junction temperature, low leakage (<1μA at 138V), and AEC-Q101 qualification option - critical for reliability-critical 12V/24V/48V system designs.
Technical Context
The P4KE170C operates as a unidirectional avalanche diode with fast response time (<1.0ps from 0V to VBR) and low dynamic impedance, ensuring rapid clamping during ESD and lightning-induced transients. Its 400W peak pulse power rating is defined at the standardized 10/1000μs double-exponential waveform per ANSI/IEEE C62.35.
It exhibits a temperature coefficient of VBR of +0.108%/°C and maintains stable clamping performance across –55°C to +175°C operating junction range. Reverse leakage remains ≤1μA at rated VWM = 138V, supporting low-power standby circuit integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 138 V - Maximum continuous DC or RMS voltage the device blocks without significant leakage. |
| VBR @ IT=1mA | 153–187 V - Verified avalanche onset range; ensures predictable turn-on above normal operating voltage. |
| VC @ IPPM=1.7A | 244 V - Clamped voltage during 10/1000μs surge; defines maximum stress imposed on protected ICs. |
| PPK | 400 W - Peak pulse power handling capability under standard surge waveform; enables single-device protection for moderate-energy transients. |
| IR @ VWM | <1 μA - Ultra-low reverse leakage preserves efficiency in high-impedance sensing or battery-backed circuits. |
| TJMAX | 175 °C - High thermal tolerance supports operation in under-hood automotive or enclosed industrial enclosures. |
| 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 indicated by band marking. Leads are pure tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to lower-potential side of protected line. | Enables unidirectional clamping - conducts only when cathode-to-anode voltage exceeds VBR. |
| Cathode | Current exit point in forward bias; marked with band; connected to higher-potential side (e.g., VIN rail). | Defines polarity-sensitive placement; reverse connection renders device non-functional for surge suppression. |
Key Features
| Feature | Design Value |
|---|---|
| 400W surge rating (10/1000μs) | Supports IEC 61000-4-5 Level 3/4 surge immunity without external derating in PCB layouts with minimal trace inductance. |
| <1.0ps response time | Clamps transients before sensitive logic or analog circuitry experiences damaging overvoltage - critical for CAN, LIN, and sensor interfaces. |
| AEC-Q101 qualified variant available | Validated for automotive under-hood applications including engine control modules and body electronics requiring zero-failure reliability. |
| UL 94V-0 flammability rating | Ensures flame-retardant encapsulation meets safety standards for industrial and medical auxiliary power systems. |
| RoHS & halogen-free compliance | Fulfills environmental requirements for global OEMs and aligns with IEC 61249-2-21 for printed circuit board assembly. |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: 12V/24V supply lines in engine control units exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and ground to clamp surges up to 120V peak. Use Value: Limits voltage seen by downstream LDOs and microcontrollers to ≤244V, preventing latch-up or gate oxide damage. |
Use Scenario: Digital input channels of programmable logic controllers interfacing with 24V sensors in factory automation. IC Role / Device Role / Timing Role: Standoff protection device mounted at connector entry to absorb EFT bursts (IEC 61000-4-4) and cable discharge events. Use Value: Maintains <1μA leakage at 24V nominal, avoiding false triggering while clamping 4kV EFT to <250V within nanoseconds. |
| LED Driver Overvoltage Clamp | DC-DC Converter Input Stage |
|
Use Scenario: Constant-current LED drivers powered from unregulated 48V telecom or streetlight supplies subject to lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input rail upstream of buck controller IC. Use Value: Absorbs 400W transients without degradation, preserving driver IC lifetime and maintaining LED string continuity. |
Use Scenario: Input stage of isolated flyback or forward converters in industrial power supplies with wide-input ranges (e.g., 36–75V). IC Role / Device Role / Timing Role: Secondary-level surge limiter complementing primary MOV or GDT-based front-end protection. Use Value: Provides precise 138V standoff and 244V clamping to protect primary-side MOSFETs and controller ICs from reflected transients. |
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 SMAJ170A | Same DO-214AC (SMA) package; 170V VBR min/max tighter (162–179V); 400W rating; bidirectional variant also available. | Surface-mount alternative requiring PCB redesign; better thermal dissipation in high-density layouts but lacks axial lead flexibility. | Select when automated SMT assembly and space-constrained boards prioritize over through-hole serviceability. |
| ON Semiconductor 1.5KE170A | Higher 1500W rating; same VWM/VBR range; DO-201AD package; larger footprint and higher clamping voltage (258V). | Suitable for higher-energy threats (e.g., direct lightning coupling) but over-specified for typical 400W system-level transients. | Choose only if legacy 1.5KE footprint compatibility or >1kW surge margin is required - otherwise adds cost and board area. |
Compared with SMAJ170A and 1.5KE170A, the P4KE170C offers optimal balance of axial-leaded ease-of-use, AEC-Q101 qualification path, and precise 244V clamping - making it ideal for cost-sensitive, reliability-driven through-hole designs where 400W surge handling suffices.
Availability
P4KE170C is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC input stages, LED driver overvoltage clamping, and DC-DC converter input protection requiring stable component supply across extended production lifecycles.
Supply support for P4KE170C 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 with ISO/TS 16949 and AEC-Q200 certified production lines.
The P4KE series was developed for cost-effective, high-reliability transient suppression in automotive, industrial, and lighting applications - emphasizing robust surge handling, tight parameter distribution, and long-term stability under thermal cycling.
FAQ
What is the maximum clamping voltage of the P4KE170C under standard surge conditions?
The P4KE170C has a maximum clamping voltage (VC) of 244 V when subjected to its rated peak pulse current of 1.7 A under the 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during a surge event. The P4KE170C maintains this clamping performance consistently across its specified operating temperature range of –55°C to +175°C.
Is the P4KE170C suitable for automotive applications?
Yes - the P4KE170C is offered in an AEC-Q101 qualified version (P4KE170CH), validated for use in automotive electronic control units, body electronics, and infotainment systems. Its 175°C maximum junction temperature, low leakage (<1 μA at 138 V), and robust 400W surge capability meet stringent requirements for under-hood and chassis-mounted modules. The base P4KE170C variant is not AEC-Q101 certified unless ordered with the "H" suffix.
How does the P4KE170C differ from the P4KE170A variant?
The P4KE170C is unidirectional, while the P4KE170A is also unidirectional but with tighter breakdown voltage tolerance (162–179 V vs. 153–187 V for P4KE170C) and slightly lower clamping voltage (234 V vs. 244 V). Both share identical package (DO-204AL), power rating (400 W), and thermal specs. The "C" suffix denotes standard tolerance; "A" indicates enhanced VBR uniformity - critical for designs requiring precise turn-on thresholds.
What is the reverse leakage current specification for the P4KE170C at its working voltage?
The P4KE170C specifies a maximum reverse leakage current (IR) of 1 μA when biased at its working stand-off voltage (VWM) of 138 V and tested at 25°C. This ultra-low leakage ensures minimal power loss in always-on circuits and prevents false triggering in high-impedance monitoring paths. Leakage remains well below 10 μA even at elevated temperatures up to 125°C, as confirmed by TSC's derating curves.
Can the P4KE170C be used in bidirectional protection configurations?
No - the P4KE170C is strictly unidirectional and must be installed with correct polarity (cathode toward the protected line's higher potential). For bidirectional protection, Taiwan Semiconductor offers the P4KE170CA variant, which uses a back-to-back diode configuration and is marked with "CA". Using P4KE170C in reverse-biased mode will not provide symmetrical clamping and may fail catastrophically during negative-going transients.
P4KE170C 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:
- -
- Bidirectional Channels:
- 1
- 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)
P4KE170C FAQ
1.How can I place an order for P4KE170C through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE170C 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 P4KE170C reliable?
The price and inventory of P4KE170C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE170C is usually 5 days.
3.What payment methods are accepted for P4KE170C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE170C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE170C?
P4KE170C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE170C 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 P4KE170C?
For technical support, including P4KE170C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE170C requirements.
6.How does Aetrix verify that P4KE170C is sourced from the original manufacturer or authorized distributors?
All P4KE170C 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 P4KE170C meets industry standards.
7.What is the process for return or replacement of P4KE170C?
All P4KE170C units undergo pre-shipment inspection (PSI). If there is an issue with P4KE170C, 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 P4KE170C part is unused and in its original packaging.
Return procedure for P4KE170C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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