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Taiwan Semiconductor Corporation P4SMA170C
- Part No.:
- P4SMA170C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA170C.pdf
- Description:
- 400W, 170V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:4,294
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Product details
Overview
P4SMA170C from Taiwan Semiconductor is a bidirectional 400W surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, with a working stand-off voltage of 138 V, breakdown voltage range 153–187 V at 1 mA, and clamping voltage of 244 V at 1.7 A under 10/1000 μs surge. It protects DC power rails in industrial SMPS and on-board DC/DC converters against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P4SMA170C datasheet, P4SMA170C pinout, P4SMA170C application, or P4SMA170C equivalent, key selection criteria include bidirectional clamping capability, 150°C junction rating, J-STD-020 Level 1 moisture sensitivity, UL 94V-0 molding compound, and compliance with ANSI/IEEE C62.35 surge standards.
Technical Context
The P4SMA170C is a unidirectional/bidirectional TVS diode configured as a single die in a DO-214AC package, designed for fast transient suppression on DC lines. Its glass-passivated junction enables sub-1 ps response time and low leakage (<1 µA at VWM), while meeting ISO 7637-2 immunity requirements for automotive and industrial electronics.
It operates across –55°C to +150°C junction temperature range, supports 40 A peak forward surge current (8.3 ms half-sine), and exhibits a temperature coefficient of VBR at 0.108 %/°C - critical for stable clamping performance over thermal excursions in high-reliability power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 138 V - maximum continuous reverse operating voltage before significant leakage |
| VBR min/max | 153 V / 187 V at 1 mA - ensures reliable breakdown initiation within defined tolerance band |
| VC @ IPPM | 244 V at 1.7 A (10/1000 μs) - peak clamped voltage limiting downstream component stress |
| PPPM | 400 W - peak pulse power handling per non-repetitive 10/1000 μs waveform |
| IR @ VWM | <1 µA - minimal standby power loss and signal integrity impact in high-impedance circuits |
| TJ max | +150°C - enables operation in thermally demanding environments like enclosed power supplies |
| Package | DO-214AC (SMA) - industry-standard SMT footprint compatible with automated placement and reflow |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (bidirectional version P4SMA170C omits cathode marking per family design), weight ≈ 0.060 g, UL 94V-0 rated compound, JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (reverse bias) | Accepts surge energy during positive polarity transients when used bidirectionally |
| Cathode | Transient current exit (reverse bias) | Routes clamped current to ground or return path; symmetric terminal function in bidirectional configuration |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating DC lines without polarity constraints |
| Sub-1 ps response time | Ensures suppression of fast ESD and switching noise before sensitive ICs experience overstress |
| ISO 7637-2 compliance | Validated for automotive-grade load dump and inductive switching immunity (Pulse 1/2a/2b/3a/3b) |
| J-STD-020 Level 1 | Eliminates bake preconditioning requirement for PCB assembly, reducing manufacturing cost and risk |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS directives for environmentally compliant end-product certification |
Applications
| Switching Mode Power Supply (SMPS) | On-board DC/DC Converter |
|---|---|
Use Scenario: Input rectified bus in offline AC/DC adapters subject to line surges and load dump transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp protecting bridge rectifier output and primary-side controller ICs. Use Value: Limits transient voltage to ≤244 V, preventing damage to 200 V-rated MOSFETs and enabling use of lower-cost input capacitors. | Use Scenario: 12 V to 3.3 V point-of-load converter in industrial PLC modules exposed to back-EMF from relay coils. IC Role / Device Role / Timing Role: Bidirectional transient suppressor across input terminals to absorb both positive and negative polarity spikes. Use Value: Clamps 1.7 A surges within 244 V, preserving regulator IC reliability without requiring dual unidirectional devices. |
| Automotive Lighting Module | Industrial Motor Drive Control Board |
Use Scenario: LED driver input in headlamp ECU subjected to ISO 7637-2 Pulse 2b (battery disconnect) events. IC Role / Device Role / Timing Role: Standoff protector maintaining 138 V operating margin while clamping 100 V+ transients. Use Value: Enables direct integration into compact lighting modules without derating due to its 150°C TJ rating and low IR. | Use Scenario: Logic supply rail protection in gate driver section where MOSFET switching induces coupled transients. IC Role / Device Role / Timing Role: Fast-reacting shunt device diverting nanosecond-scale coupling spikes away from isolated gate drivers. Use Value: Sub-1 ps response prevents false triggering or latch-up in digital isolators and level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CA | 600 W PPPM rating, SMB package (larger footprint), 253 V VC @ 2.4 A | Higher power handling but requires PCB area increase; not drop-in due to different pad layout | Select when system-level surge testing exceeds 400 W or board space allows larger package |
| 1.5KE170CA | 1500 W PPPM, DO-201 package (through-hole), 274 V VC @ 5.5 A | Designed for legacy through-hole assembly; unsuitable for automated SMT lines | Choose only for repair/refurbishment of existing through-hole designs or prototyping with breadboard compatibility |
Compared with SMBJ170CA and 1.5KE170CA, the P4SMA170C offers optimal balance of 400 W surge capacity, DO-214AC SMT compatibility, and 244 V clamping in space-constrained industrial and automotive modules - making it preferred for new SMT-based designs requiring ISO 7637-2 compliance without footprint penalty.
Availability
P4SMA170C is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and automotive lighting modules requiring stable component supply across extended temperature and surge immunity specifications.
Supply support for P4SMA170C 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, specializing in TVS diodes, rectifiers, and power MOSFETs for industrial and automotive markets.
The P4SMA170C belongs to TSC's P4SMAx series of surface-mount TVS diodes, engineered specifically for robust transient suppression in space-limited, high-reliability DC power interfaces - emphasizing fast response, low leakage, and standardized SMT manufacturability.
FAQ
What is the polarity configuration of P4SMA170C?
The P4SMA170C is a bidirectional TVS diode, meaning it provides symmetrical clamping for both positive and negative polarity transients without requiring external polarity orientation. Unlike unidirectional variants (e.g., P4SMA170A), the "C" suffix denotes bidirectional functionality - confirmed by electrical characteristics applying in both directions and absence of cathode band marking per DO-214AC mechanical drawing. This makes P4SMA170C ideal for floating or AC-coupled signal/power lines.
Does P4SMA170C meet automotive transient immunity standards?
Yes, the P4SMA170C meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a (sudden load removal), Pulse 2b (supply line interruption), Pulse 3a (capacitive coupled noise), and Pulse 3b (ground noise). Its 400 W peak pulse power rating, 244 V clamping voltage, and sub-1 ps response time are validated under these waveforms - making it suitable for automotive body control modules, lighting ECUs, and infotainment power inputs per TSC documentation.
What is the maximum junction temperature rating for P4SMA170C?
The P4SMA170C has a maximum junction temperature (TJ MAX) rating of +150°C, verified per absolute maximum ratings table. This allows reliable operation in high-temperature environments such as enclosed power supplies, motor drive enclosures, and under-hood automotive electronics. Derating curves (Fig.2) specify power reduction above 25°C ambient, ensuring thermal safety margins are maintained across full industrial and automotive temperature ranges.
Is P4SMA170C compatible with lead-free reflow soldering processes?
Yes, the P4SMA170C is fully compatible with lead-free reflow soldering. Its matte tin-plated leads comply with J-STD-002 for solderability, and its DO-214AC package uses UL 94V-0 molding compound rated for peak reflow temperatures up to 260°C. Moisture sensitivity level is J-STD-020 Level 1 - meaning no floor life limitation or baking is required prior to assembly, simplifying SMT line integration.
How does the clamping voltage of P4SMA170C compare to its breakdown voltage?
The P4SMA170C has a minimum breakdown voltage (VBR) of 153 V at 1 mA and a maximum clamping voltage (VC) of 244 V at 1.7 A (10/1000 μs). This 91 V differential reflects the dynamic impedance of the silicon junction under surge conditions - a typical design margin ensuring downstream components (e.g., 200 V MOSFETs) remain within safe operating area during transient events. The ratio VC/VBR ≈ 1.60 falls within standard TVS performance expectations for this power class.
P4SMA170C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA
- 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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA170C FAQ
1.How can I place an order for P4SMA170C through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA170C 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 P4SMA170C reliable?
The price and inventory of P4SMA170C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA170C is usually 5 days.
3.What payment methods are accepted for P4SMA170C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA170C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA170C?
P4SMA170C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA170C 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 P4SMA170C?
For technical support, including P4SMA170C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA170C requirements.
6.How does Aetrix verify that P4SMA170C is sourced from the original manufacturer or authorized distributors?
All P4SMA170C 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 P4SMA170C meets industry standards.
7.What is the process for return or replacement of P4SMA170C?
All P4SMA170C units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA170C, 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 P4SMA170C part is unused and in its original packaging.
Return procedure for P4SMA170C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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