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Taiwan Semiconductor Corporation P4SMA170CA
- Part No.:
- P4SMA170CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA170CA.pdf
- Description:
- TVS DIODE 145VWM 234VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,898
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Product details
Overview
P4SMA170CA from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power lines and signal paths. It features a 153–187 V breakdown voltage (VBR), 138 V working stand-off voltage (VWM), 244 V maximum clamping voltage (VC) at 1.7 A peak pulse current, and 400 W peak pulse power rating under 10/1000 µs waveform - deployed in switching mode power supplies and automotive electronics.
For engineers reviewing the P4SMA170CA datasheet, P4SMA170CA pinout, P4SMA170CA application, or P4SMA170CA equivalent, key selection criteria include bidirectional clamping capability, DO-214AC (SMA) package compatibility, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, low leakage (<1 µA at VWM), and junction temperature range of –55°C to +150°C.
Technical Context
The P4SMA170CA implements a glass-passivated silicon avalanche junction optimized for fast transient suppression with sub-1 ps response time. Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating bus applications without polarity sensitivity.
It operates within a –55°C to +150°C junction temperature range and is rated for 400 W non-repetitive peak pulse power (10/1000 µs), derated linearly above 25°C ambient per manufacturer's curve. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 153 V / 187 V at 1.0 mA test current - defines reliable avalanche initiation threshold across production lot |
| VWM | 138 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 244 V at 1.7 A (10/1000 µs) - clamping voltage seen by protected circuit during worst-case surge |
| PPPM | 400 W - peak transient energy absorption capacity without failure |
| IR @ VWM | <1 µA - ensures minimal standby power loss and signal integrity in high-impedance nodes |
| TJ range | –55°C to +150°C - supports operation in under-hood automotive and industrial environments |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline with 0.060 g mass and UL 94V-0 molding compound |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, cathode band marking for unidirectional variants; P4SMA170CA is bidirectional and marked with "RNJ" code - no polarity designation required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction terminals | Either terminal accepts reverse or forward surge - no PCB orientation constraint |
| Case | Non-connected plastic body | No thermal or electrical connection to PCB pad; mechanical mounting only |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated surges |
| ISO 7637-2 compliance | Validated for automotive load-dump and inductive-switching transients (Pulse 1/2a/2b/3a/3b) |
| Sub-1 ps response time | Clamps transients before sensitive downstream ICs experience overstress |
| Moisture Sensitivity Level 1 | Zero bake requirement prior to reflow - compatible with standard SMT assembly lines |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for eco-compliant designs |
Applications
| Automotive Power Distribution | Industrial DC/DC Converters |
|---|---|
Use Scenario: Protection of 24 V and 48 V battery-fed ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power rail upstream of DC/DC controller and LDOs. Use Value: Withstands 400 W pulses and clamps to ≤244 V, preventing damage to 36 V-rated MOSFETs and controllers. | Use Scenario: Input-side surge suppression in isolated 48 V-to-12 V DC/DC modules used in factory automation. IC Role / Device Role / Timing Role: Bidirectional TVS placed across primary-side bulk capacitor to absorb reflected switching noise and external EFT. Use Value: 138 V VWM allows safe operation with 48 V nominal input (derated 2.8×), while 244 V VC protects secondary-side regulation circuitry. |
| LED Driver Power Inputs | Telecom Power Feeds |
Use Scenario: Overvoltage protection on constant-current LED driver inputs exposed to outdoor lightning-induced surges. IC Role / Device Role / Timing Role: First-line defense parallel to bulk electrolytic capacitor on AC/DC or DC/DC front-end. Use Value: 400 W rating handles multi-kV induced transients; DO-214AC footprint enables compact layout adjacent to connector entry point. | Use Scenario: Surge protection on -48 V telecom power feeds entering base station equipment cabinets. IC Role / Device Role / Timing Role: Bidirectional clamp on centralized power distribution board before hot-swap controllers. Use Value: Symmetrical clamping eliminates need for dual unidirectional devices; 1.7 A IPPM aligns with ITU-T K.20/21 surge test profiles. |
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 VWM/VC specs but 600 W PPPM; DO-214AA (SMB) package - 1.6 mm wider than DO-214AC | Higher power handling suits higher-energy surge environments; larger footprint requires PCB redesign | Select when >400 W margin is needed and board space permits SMB outline |
| 1.5KE170CA (ON Semiconductor) | Through-hole TO-204AE (DO-41); same VBR/VC but 1500 W PPPM; leaded construction limits high-frequency response | Used in legacy or high-reliability through-hole assemblies; not suitable for automated SMT lines | Select only for repair, retrofit, or non-SMT production where leaded mounting is mandated |
Compared with SMBJ170CA and 1.5KE170CA, the P4SMA170CA offers optimal balance of 400 W surge capability, DO-214AC compactness, and full SMT manufacturability - making it preferred for space-constrained, high-volume automotive and industrial PCBs requiring ISO 7637-2 compliance.
Availability
P4SMA170CA is available at Aetrix Electronics and suitable for automotive power distribution, industrial DC/DC converters, and LED driver power inputs requiring stable component supply across extended temperature and surge conditions.
Supply support for P4SMA170CA 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 Company (TSC) is a vertically integrated Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs since 1979.
The P4SMA series belongs to TSC's surface-mount TVS portfolio engineered specifically for automotive-grade transient immunity and industrial power rail protection - emphasizing reliability, AEC-Q200 alignment, and high-volume SMT compatibility.
FAQ
What does the "CA" suffix indicate in P4SMA170CA?
The "CA" suffix in P4SMA170CA denotes a bidirectional configuration - meaning the device provides symmetrical transient clamping in both polarities. Unlike unidirectional "A" variants (e.g., P4SMA170A), the P4SMA170CA has no anode/cathode distinction and is marked with "RNJ" only. This makes it ideal for AC-coupled lines or floating buses where polarity reversal may occur.
What is the maximum clamping voltage of P4SMA170CA under standard test conditions?
The maximum clamping voltage (VC) of P4SMA170CA is 244 V when subjected to a 10/1000 µs surge waveform at 1.7 A peak pulse current (IPPM). This value is measured per ANSI/IEEE C62.35 and represents the upper limit voltage imposed on the protected circuit during worst-case transient events - critical for ensuring downstream components remain within their absolute maximum ratings.
Is P4SMA170CA compliant with automotive transient standards?
Yes, P4SMA170CA meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b - covering typical automotive electrical disturbances including load dump, supply interruption, and coupled transients. Its 400 W peak pulse power rating, –55°C to +150°C operating range, and JESD201 Class 2 whisker resistance further support deployment in engine control units and body electronics.
What is the working stand-off voltage (VWM) of P4SMA170CA, and why does it matter?
The working stand-off voltage (VWM) of P4SMA170CA is 138 V - the maximum continuous DC or RMS voltage the device can withstand without entering avalanche conduction. This parameter ensures minimal leakage current (<1 µA) during normal operation while providing sufficient margin below the 153–187 V breakdown range. It directly determines compatibility with 110 V or 120 V nominal systems and prevents false triggering during voltage ripple.
Does P4SMA170CA require special handling or baking before reflow soldering?
No, P4SMA170CA has Moisture Sensitivity Level (MSL) 1 per J-STD-020 - meaning it may be stored indefinitely at ≤30°C/60% RH and placed directly into reflow without pre-baking. Its DO-214AC (SMA) package uses UL 94V-0 molding compound and matte tin-plated leads compliant with J-STD-002, supporting standard lead-free reflow profiles without popcorn or delamination risk.
P4SMA170CA 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):
- 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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA170CA FAQ
1.How can I place an order for P4SMA170CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA170CA 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 P4SMA170CA reliable?
The price and inventory of P4SMA170CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA170CA is usually 5 days.
3.What payment methods are accepted for P4SMA170CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA170CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA170CA?
P4SMA170CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA170CA 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 P4SMA170CA?
For technical support, including P4SMA170CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA170CA requirements.
6.How does Aetrix verify that P4SMA170CA is sourced from the original manufacturer or authorized distributors?
All P4SMA170CA 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 P4SMA170CA meets industry standards.
7.What is the process for return or replacement of P4SMA170CA?
All P4SMA170CA units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA170CA, 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 P4SMA170CA part is unused and in its original packaging.
Return procedure for P4SMA170CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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