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Taiwan Semiconductor Corporation P4SMA51CA
- Part No.:
- P4SMA51CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA51CA.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,320
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Product details
Overview
P4SMA51CA from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 51V breakdown voltage (min 48.5V, max 53.6V), and clamping voltage of 70.1V at 6.0A peak impulse current under 10/1000μs waveform. It protects DC/DC converters and industrial power supplies against ESD and surge events per ISO 7637-2.
For engineers reviewing the P4SMA51CA datasheet, P4SMA51CA pinout, P4SMA51CA application, or P4SMA51CA equivalent, key selection factors include bidirectional clamping capability, 1μA max reverse leakage at 43.6V working stand-off voltage, -55°C to +150°C operating junction temperature, and compliance with J-STD-020 level 1 moisture sensitivity.
Technical Context
The P4SMA51CA implements a glass-passivated silicon avalanche junction optimized for fast transient suppression with sub-1ps response time. Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating signal paths without polarity constraints.
Designed for automotive and industrial environments, it meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements and supports operation up to 150°C junction temperature with derating above 25°C ambient per Fig.2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 48.5V / 53.6V at 1mA test current - defines guaranteed clamping onset range under standardized avalanche condition |
| VWM | 43.6V - maximum continuous reverse voltage before significant leakage; sets system operating margin below breakdown |
| IR @ VWM | <1μA - ensures negligible standby power loss and signal integrity in high-impedance circuits |
| VC @ IPPM | 70.1V at 6.0A (10/1000μs) - peak clamped voltage during worst-case surge; determines protected circuit's voltage stress limit |
| PPPM | 400W - peak pulse power handling capacity; defines survivability against defined transient waveforms |
| TJ max | +150°C - maximum junction temperature; enables use in thermally demanding environments like engine control units |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline with matte tin-plated leads compliant to J-STD-002 solderability |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with cathode band marking; dual axial leads suitable for automated placement; weight ≈ 0.060g; UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Transient current entry point in negative half-cycle | Provides symmetrical conduction path during bidirectional surges; no polarity dependency in layout |
| Cathode (banded end) | Transient current entry point in positive half-cycle | Band identifies terminal orientation; required for visual verification but irrelevant for functional connection in CA variants |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines or floating nodes without external polarity management |
| Sub-1ps response time | Ensures suppression activation before transient energy couples into sensitive downstream circuitry |
| ISO 7637-2 compliance | Validates robustness against automotive-level load dump and inductive switching transients |
| J-STD-020 Level 1 moisture sensitivity | Permits unlimited floor life and standard reflow without baking preconditioning |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS directives for environmentally constrained applications |
Applications
| Automotive Infotainment Power Rails | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting 12V/24V power inputs of head unit MCUs and display drivers from battery line transients. IC Role / Device Role / Timing Role: Bidirectional TVS device absorbing ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 3b (ESD-like spikes). Use Value: Clamps transients to ≤70.1V, preventing latch-up or damage to 3.3V/5V logic powered via buck regulators. | Use Scenario: Safeguarding 24V digital input channels on programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Standoff protector maintaining <1μA leakage at 43.6V while clamping 400W pulses within 1ps. Use Value: Enables reliable operation in factory environments with frequent relay switching and motor drive noise. |
| LED Driver Secondary-Side Output | Telecom DC/DC Converter Input |
Use Scenario: Suppressing turn-off spikes from inductive LED strings connected to constant-current drivers. IC Role / Device Role / Timing Role: Fast-acting voltage clamp placed across output terminals to prevent overvoltage failure of MOSFET switches. Use Value: Limits voltage excursion to 70.1V during 6A transients, preserving driver FET SOA and optical module reliability. | Use Scenario: Protecting isolated 48V-to-3.3V DC/DC converter inputs in base station power modules. IC Role / Device Role / Timing Role: Primary-side surge limiter meeting IEC 61000-4-5 Level 4 immunity requirements. Use Value: Withstands 400W pulses without degradation, ensuring uninterrupted operation during lightning-induced grid disturbances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA (Bourns) | Same DO-214AA package; 600W rating; higher clamping voltage (77.0V @ 7.8A) | Better suited for higher-energy surges where board space allows larger SMB footprint | Select SMBJ51CA when surge energy exceeds 400W but PCB layout accommodates DO-214AA |
| 1.5KE51CA (ON Semiconductor) | Through-hole DO-15 package; 1500W rating; higher VC (84.5V @ 17.7A) | Used in legacy designs or high-reliability through-hole assemblies requiring manual inspection | Choose 1.5KE51CA only for through-hole manufacturing or when >600W surge margin is mandatory |
Compared with SMBJ51CA and 1.5KE51CA, the P4SMA51CA offers optimal balance of 400W surge handling, DO-214AC compactness, and low-leakage performance for modern SMT power rail protection-without requiring PCB redesign or sacrificing thermal derating margin.
Availability
P4SMA51CA is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC I/O modules, and telecom DC/DC converters requiring stable component supply across extended production lifecycles.
Supply support for P4SMA51CA 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 devices since 1979.
The P4SMA series belongs to TSC's surface-mount TVS portfolio engineered specifically for ISO 7637-2-compliant automotive and harsh-environment industrial surge protection with emphasis on consistency, JEDEC-compliant packaging, and AEC-Q200 readiness.
FAQ
What is the breakdown voltage tolerance for P4SMA51CA?
The P4SMA51CA has a specified breakdown voltage range of 48.5V to 53.6V at 1mA test current, corresponding to ±5% tolerance around the nominal 51V rating. This range is measured per ANSI/IEEE C62.35 standards using a 300μs square-wave pulse, ensuring consistent avalanche initiation across production lots.
Is P4SMA51CA unidirectional or bidirectional?
P4SMA51CA is a bidirectional TVS diode, indicated by the "CA" suffix. It provides symmetrical clamping in both polarities, making it suitable for AC signal lines, floating grounds, or any application where voltage transients may swing positive or negative relative to reference. The cathode band serves only as a mechanical orientation marker-not a polarity indicator.
What is the maximum clamping voltage of P4SMA51CA under standard test conditions?
The maximum clamping voltage of P4SMA51CA is 70.1V at 6.0A peak impulse current with a 10/1000μs waveform. This value is guaranteed across temperature and process variation and defines the upper voltage limit imposed on protected circuitry during a defined surge event, directly informing system-level overvoltage design margins.
Does P4SMA51CA meet automotive surge immunity standards?
Yes, P4SMA51CA meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for automotive electrical transient immunity. Its 400W peak pulse power rating, fast sub-1ps response, and stable clamping behavior under temperature variation make it suitable for protecting ECUs, body control modules, and infotainment power rails in 12V and 24V vehicle architectures.
What is the moisture sensitivity level (MSL) of P4SMA51CA?
P4SMA51CA is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life at ≤30°C/60% RH and requires no baking prior to reflow soldering. This simplifies manufacturing logistics and eliminates yield risk from moisture-induced popcorning during standard lead-free reflow profiles.
P4SMA51CA 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):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 6A
- 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)
P4SMA51CA FAQ
1.How can I place an order for P4SMA51CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA51CA 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 P4SMA51CA reliable?
The price and inventory of P4SMA51CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA51CA is usually 5 days.
3.What payment methods are accepted for P4SMA51CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA51CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA51CA?
P4SMA51CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA51CA 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 P4SMA51CA?
For technical support, including P4SMA51CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA51CA requirements.
6.How does Aetrix verify that P4SMA51CA is sourced from the original manufacturer or authorized distributors?
All P4SMA51CA 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 P4SMA51CA meets industry standards.
7.What is the process for return or replacement of P4SMA51CA?
All P4SMA51CA units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA51CA, 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 P4SMA51CA part is unused and in its original packaging.
Return procedure for P4SMA51CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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