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Taiwan Semiconductor Corporation P4SMA47A
- Part No.:
- P4SMA47A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA47A.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,973
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Product details
Overview
P4SMA47A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power rails and signal lines. It features a 400W peak pulse power rating, 44.7–49.4V breakdown voltage at 1mA test current, 40.2V working stand-off voltage, <1μA reverse leakage at VWM, and clamps to 64.8V at 6.4A (10/1000μs waveform), making it suitable for protecting SMPS outputs and DC/DC converter inputs.
For engineers reviewing the P4SMA47A datasheet, P4SMA47A pinout, P4SMA47A application, or P4SMA47A equivalent, key selection criteria include its DO-214AC (SMA) package compatibility, unidirectional polarity marking, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and junction temperature range of –55°C to +150°C for automotive and industrial power supply designs.
Technical Context
The P4SMA47A operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1.0ps) to transient surges while maintaining low leakage. Its clamping behavior follows standardized 10/1000μs waveform testing per ANSI/IEEE C62.35, with thermal derating above 25°C ambient per Fig.2.
It is rated for 40A non-repetitive forward surge (8.3ms half-sine), supports matte tin-plated leads compliant with J-STD-002 solderability, and meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements in its DO-214AC molded package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 44.7V / 49.4V at 1mA - defines minimum and maximum guaranteed avalanche initiation voltage under standard test conditions |
| VWM | 40.2V - maximum continuous reverse operating voltage before significant leakage begins |
| IR @ VWM | <1μA - ensures negligible standby power loss and minimal loading on protected circuits |
| VC @ IPPM | 64.8V at 6.4A (10/1000μs) - peak clamped voltage limiting stress on downstream ICs during surge events |
| PPPM | 400W - peak pulse power handling capability under standardized surge waveform |
| TJ max | +150°C - maximum junction temperature allowing reliable operation in high-ambient environments like engine compartments |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline with cathode band marking and 0.060g mass |
Pinout & Package
DO-214AC (SMA) package: molded epoxy case with matte tin-plated leads, cathode band indicating terminal polarity, and JEDEC-compliant mechanical dimensions optimized for automated placement and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side (e.g., GND or return path) in unidirectional TVS configuration |
| Cathode (marked) | Avalanche clamping node | Connected to protected line (e.g., +VOUT); conducts during overvoltage to clamp to VC |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable breakdown characteristics and long-term reliability under repeated surge stress |
| Fast response time <1.0ps | Enables suppression of nanosecond-scale transients before sensitive components experience overstress |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validates suitability for automotive electronics subjected to load dump and inductive switching noise |
| Moisture sensitivity level 1 (J-STD-020) | Eliminates need for dry-pack or baking prior to SMT assembly, reducing manufacturing overhead |
| RoHS & halogen-free (IEC 61249-2-21) | Meets global environmental regulations without compromising electrical performance or thermal robustness |
Applications
| Switching Mode Power Supply (SMPS) Output Protection | On-Board DC/DC Converter Input Protection |
|---|---|
Use Scenario: Protecting regulated 48V output rail of an isolated flyback SMPS against load dump and ESD-induced transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between output and ground to clamp positive-going surges exceeding 40.2V. Use Value: Limits transient voltage to ≤64.8V, preventing damage to downstream regulators, controllers, or communication interfaces powered from the rail. | Use Scenario: Safeguarding input of a 48V-to-12V buck converter in industrial control module exposed to battery line transients. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing energy from ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2b (supply interruption). Use Value: Withstands 400W peak pulses and maintains <1μA leakage, preserving efficiency while ensuring immunity to 100V/50ms transients. |
| Lighting Application Surge Suppression | Adapter-Level Overvoltage Clamping |
Use Scenario: Protecting LED driver IC inputs in outdoor streetlight systems subject to lightning-induced surges on 48V DC distribution lines. IC Role / Device Role / Timing Role: Primary clamping device on DC bus, coordinated with upstream fusing and filtering. Use Value: Fast <1.0ps response captures initial surge edge; DO-214AC package enables compact layout near connector entry point. | Use Scenario: Clamping overvoltage on secondary-side output of AC/DC adapter powering IoT gateway equipment. IC Role / Device Role / Timing Role: Final-stage TVS on low-voltage output (e.g., 5V/12V/48V) to meet IEC/EN 61000-4-5 Level 3 immunity. Use Value: 400W rating handles repetitive surges; RoHS/halogen-free construction aligns with end-product environmental certifications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ47A (Bourns) | Same DO-214AA package, identical VBR (44.7–49.4V), but rated for 600W PPPM and higher IPPM (9.2A) | Higher surge margin suits harsher environments (e.g., heavy-duty vehicle ECUs) | Select SMBJ47A when system-level surge testing exceeds 400W or requires extended lifetime under repetitive transients |
| 1.5SMC47A (ON Semiconductor) | DO-214AB (SMC) package, same electrical specs, but larger footprint and 1.5kW PPPM rating | Requires PCB redesign due to larger body; used where board space allows and higher single-event energy absorption is needed | Choose 1.5SMC47A only if existing layout accommodates SMC outline and application demands >400W single-pulse capability |
Compared with SMBJ47A and 1.5SMC47A, the P4SMA47A offers optimal balance of compact DO-214AC footprint, certified ISO 7637-2 compliance, and sufficient 400W surge rating for cost-sensitive industrial and lighting applications without requiring layout changes or over-spec'ed power margins.
Availability
P4SMA47A is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and lighting applications requiring stable component supply across automotive, industrial, and infrastructure programs.
Supply support for P4SMA47A 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 MOSFETs for industrial and automotive markets.
The P4SMA series belongs to TSC's surface-mount TVS portfolio engineered specifically for high-reliability transient suppression in space-constrained, high-temperature environments with stringent automotive EMC requirements.
FAQ
What is the breakdown voltage range of the P4SMA47A?
The P4SMA47A has a guaranteed breakdown voltage (VBR) range of 44.7V to 49.4V at 1mA test current, measured per ANSI/IEEE C62.35 standards. This range ensures consistent avalanche initiation across production lots and supports robust design margining against overvoltage thresholds in 48V systems. The P4SMA47A's specified VBR tolerance directly informs clamping window calculations in protection circuit design.
Is the P4SMA47A suitable for automotive applications?
Yes, the P4SMA47A meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements and operates across –55°C to +150°C junction temperature range-key qualifications for automotive power net protection. Its glass-passivated junction and JESD201 Class 2 whisker resistance further validate suitability for under-hood and chassis-mounted modules. The P4SMA47A is explicitly referenced in TSC's automotive-grade TVS documentation.
What does the "A" suffix indicate in P4SMA47A?
The "A" suffix in P4SMA47A denotes a tighter VBR tolerance (±5% typical) versus the non-A variant (±10%), resulting in a narrower 44.7–49.4V breakdown range compared to P4SMA47's 42.3–51.7V. This improves predictability in clamping voltage and reduces design margin uncertainty. The P4SMA47A's tighter spec supports precision protection in regulated 48V architectures where overvoltage headroom is constrained.
Can the P4SMA47A be used in bidirectional configurations?
No-the P4SMA47A is a unidirectional TVS diode, marked with a cathode band and specified only for single-polarity surge suppression. For bidirectional use, TSC recommends the P4SMA47CA variant (with "CA" suffix), which provides symmetrical clamping in both directions. Using P4SMA47A in reverse-biased AC applications would result in forward conduction and failure; always verify polarity alignment in the P4SMA47A schematic symbol and layout.
What is the maximum clamping voltage of the P4SMA47A during a surge event?
The P4SMA47A clamps to a maximum of 64.8V at 6.4A peak pulse current under the standardized 10/1000μs waveform. This value is measured at the device terminals and represents worst-case voltage seen by downstream components during surge conditions. Designers must ensure that the protected IC's absolute maximum ratings exceed 64.8V, and that the P4SMA47A's VC is coordinated with upstream impedance to limit let-through energy.
P4SMA47A 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 6.4A
- 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)
P4SMA47A FAQ
1.How can I place an order for P4SMA47A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA47A 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 P4SMA47A reliable?
The price and inventory of P4SMA47A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA47A is usually 5 days.
3.What payment methods are accepted for P4SMA47A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA47A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA47A?
P4SMA47A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA47A 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 P4SMA47A?
For technical support, including P4SMA47A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA47A requirements.
6.How does Aetrix verify that P4SMA47A is sourced from the original manufacturer or authorized distributors?
All P4SMA47A 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 P4SMA47A meets industry standards.
7.What is the process for return or replacement of P4SMA47A?
All P4SMA47A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA47A, 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 P4SMA47A part is unused and in its original packaging.
Return procedure for P4SMA47A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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