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Taiwan Semiconductor Corporation P4KE170CA
- Part No.:
- P4KE170CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE170CA.pdf
- Description:
- TVS DIODE 145VWM 234VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,741
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Product details
Overview
P4KE170CA from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in DO-204AL (DO-41) package, designed for high-energy surge protection in DC power rails and signal lines. It features a 170V nominal breakdown voltage (VBR min/max: 153V/187V), 138V working stand-off voltage (VWM), 1.7A peak pulse current (IPPM), and clamps transients to ≤234V at IPPM - suitable for protecting automotive body control modules against ISO 7637-2 pulses.
For engineers reviewing the P4KE170CA datasheet, P4KE170CA pinout, P4KE170CA application, or P4KE170CA equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification (H-grade variant), low leakage (<1μA at VWM), and compatibility with 10/1000μs surge waveforms up to 400W.
Technical Context
The P4KE170CA operates as a voltage-clamped avalanche diode, responding to overvoltage events with sub-nanosecond turn-on (≤5.0ns for bidirectional mode) and maintaining low dynamic impedance during clamping. Its bidirectional symmetry ensures identical electrical characteristics in both polarities, eliminating polarity-dependent design constraints.
Rated for 400W peak pulse power at 10/1000μs waveform and operating across –55°C to +175°C junction temperature range, it supports robust protection in under-hood automotive environments and industrial power supplies where thermal derating and long-term reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Voltage | 170V - defines primary clamping threshold for bidirectional surge suppression |
| Breakdown Voltage (VBR) | 153V–187V @ 1mA - verified avalanche onset range ensuring predictable turn-on margin above VWM |
| Working Stand-off Voltage (VWM) | 138V - maximum continuous reverse voltage before leakage exceeds 1μA, defining safe operating DC bias |
| Peak Pulse Current (IPPM) | 1.7A @ 10/1000μs - quantifies maximum transient energy absorption without failure |
| Clamping Voltage (VC) | 234V @ IPPM - actual voltage seen by protected circuit during worst-case surge, limiting stress on downstream ICs |
| Junction Temperature Range | –55°C to +175°C - enables deployment in engine compartments and industrial enclosures without thermal derating penalties |
| Package | DO-204AL (DO-41) - industry-standard axial leaded package with tin-plated leads compliant with J-STD-002 solderability |
Pinout & Package
DO-204AL (DO-41) axial-leaded package with cathode band marking omitted for bidirectional operation; terminals are non-polarized and function identically in either orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | No polarity dependency - either lead serves as input/output for transient conduction in both directions |
| Lead 1 / Lead 2 | Current path for surge diversion | Low-inductance axial path capable of handling 40A single-half-sine forward surge (IFSM) without bond wire failure |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (H-grade) | Validated for automotive applications including engine control units and lighting modules per stress test requirements |
| 400W peak pulse rating | Withstands repetitive 10/1000μs surges up to 400W without parameter shift or degradation |
| Fast response time | ≤5.0ns turn-on for bidirectional mode ensures protection before sensitive logic or analog circuits experience overvoltage |
| Low reverse leakage | <1μA at 138V VWM minimizes standby power loss and avoids false triggering in high-impedance sensor interfaces |
| UL 94V-0 molding compound | Flame-retardant encapsulation meets safety standards for enclosed industrial and automotive assemblies |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load dump and jump-start transients in vehicle body electronics. IC Role / Device Role / Timing Role: Bidirectional clamping device placed between power rail and ground, shunting surge energy away from protected ICs. Use Value: Clamps 12V system transients to ≤234V, preventing latch-up or gate oxide damage in 3.3V/5V logic devices downstream. |
Use Scenario: Safeguarding 4–20mA current loop transmitters in factory automation against ESD and inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Standoff protector across loop supply terminals, activated only during >138V excursions. Use Value: Maintains <1μA leakage at 24V nominal rail, avoiding measurement error while suppressing ±1kV EFT bursts per IEC 61000-4-4. |
| LED Driver Overvoltage Suppression | AC-DC Adapter Input Stage Protection |
Use Scenario: Shielding constant-current LED driver ICs from mains-borne surges and lightning-induced spikes in outdoor signage systems. IC Role / Device Role / Timing Role: Primary surge clamp at DC input stage, coordinated with upstream MOVs for staged energy handling. Use Value: Limits transient voltage to 234V, preventing overvoltage failure of internal FETs rated for 200V drain-source breakdown. |
Use Scenario: Secondary-side transient suppression in universal-input AC-DC adapters to protect rectifier output and PFC controller inputs. IC Role / Device Role / Timing Role: Fast-acting bidirectional clamp across bulk capacitor terminals, absorbing residual surges after primary-stage filtering. Use Value: Responds within 5ns to clamp 10/1000μs transients, reducing stress on electrolytic capacitor ripple current rating and controller UVLO thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CA (Bourns) | Same 170V nominal, DO-214AA package, 1.5A IPPM, 243V VC - lower surge rating but surface-mount compatible | Requires PCB rework for SMT vs. through-hole; better suited for space-constrained consumer power supplies | Select when board real estate is limited and thermal management allows lower 600W peak rating |
| 1.5KE170CA (ON Semiconductor) | Same DO-204AL package, 170V nominal, but 1.5A IPPM and 243V VC - slightly higher clamping voltage and lower surge capacity | Legacy industrial designs with existing 1.5KE footprint; same mounting and solder process | Choose for drop-in replacement where legacy BOM reuse and qualification continuity are prioritized over marginal performance gain |
Compared with P4KE170CA, SMBJ170CA trades axial through-hole robustness for SMT compactness and lower surge handling, while 1.5KE170CA offers identical packaging but reduced peak pulse current and higher clamping - making P4KE170CA optimal for new automotive and high-reliability industrial designs demanding maximum surge margin.
Availability
P4KE170CA is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, LED driver systems, and AC-DC adapter designs requiring stable component supply with AEC-Q101 compliance and long-lifecycle support.
Supply support for P4KE170CA 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 distribution and AEC-Q101 certification capabilities.
The P4KE series targets cost-sensitive yet reliability-critical surge protection applications in automotive, industrial, and consumer power systems - emphasizing robustness, standardized packaging, and broad voltage coverage from 6.8V to 440V.
FAQ
What is the clamping voltage of P4KE170CA at its rated peak pulse current?
The P4KE170CA clamps to a maximum of 234V when subjected to its rated 1.7A peak pulse current (IPPM) under the standard 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream components see no more than 234V during a defined surge event, enabling reliable protection of 200V-rated semiconductors.
Is P4KE170CA suitable for automotive applications?
Yes, the P4KE170CA is AEC-Q101 qualified when ordered with the "H" suffix (e.g., P4KE170CAH), confirming its suitability for automotive powertrain and body electronics. The base P4KE170CA meets all electrical and thermal specifications required for under-hood use, including operation from –55°C to +175°C and resistance to mechanical shock and vibration per AEC-Q101 test conditions.
How does the bidirectional configuration of P4KE170CA affect circuit layout?
The P4KE170CA has no polarity marking and functions identically in either orientation, simplifying PCB layout by eliminating orientation checks during assembly. Unlike unidirectional TVS diodes, it protects against both positive and negative transients without requiring external series components or dual-device configurations - reducing bill-of-materials count and board area in DC power line protection.
What is the maximum steady-state power dissipation of P4KE170CA?
The P4KE170CA has a steady-state power dissipation (PD) rating of 1W at lead temperature (TL) of 75°C, measured with 0.375" (9.5mm) lead lengths mounted on 5×5 mm copper pads. This rating applies only to continuous DC or low-frequency AC stress - not transient events - and must be thermally managed via adequate copper pour or heatsinking to avoid exceeding 175°C maximum junction temperature.
Does P4KE170CA meet RoHS and halogen-free requirements?
Yes, P4KE170CA complies with RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21, using molding compound and lead finishes free of brominated flame retardants, chlorine, fluorine, iodine, and bromine. This ensures environmental compliance for export to EU, China, and other regulated markets without compromising UL 94V-0 flammability performance.
P4KE170CA 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):
- 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)
P4KE170CA FAQ
1.How can I place an order for P4KE170CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE170CA 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 P4KE170CA reliable?
The price and inventory of P4KE170CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE170CA is usually 5 days.
3.What payment methods are accepted for P4KE170CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE170CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE170CA?
P4KE170CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE170CA 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 P4KE170CA?
For technical support, including P4KE170CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE170CA requirements.
6.How does Aetrix verify that P4KE170CA is sourced from the original manufacturer or authorized distributors?
All P4KE170CA 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 P4KE170CA meets industry standards.
7.What is the process for return or replacement of P4KE170CA?
All P4KE170CA units undergo pre-shipment inspection (PSI). If there is an issue with P4KE170CA, 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 P4KE170CA part is unused and in its original packaging.
Return procedure for P4KE170CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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