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Taiwan Semiconductor Corporation P4SMA47C
- Part No.:
- P4SMA47C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA47C.pdf
- Description:
- 400W, 47V, 10%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:7,454
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Product details
Overview
P4SMA47C from Taiwan Semiconductor is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode with a 47V breakdown voltage (VBR = 42.3–51.7V), 38.1V working stand-off voltage (VWM), and 67.8V clamping voltage (VC) at 6.2A peak pulse current - designed to protect DC/DC converters, SMPS outputs, and industrial I/O interfaces against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P4SMA47C datasheet, P4SMA47C pinout, P4SMA47C application, or P4SMA47C equivalent, key selection criteria include its DO-214AC (SMA) package compatibility, sub-1ps response time, <1µA leakage at VWM, 150°C junction rating, and bidirectional-capable variant options (P4SMA47CA) for AC-coupled signal lines.
Technical Context
The P4SMA47C employs a glass-passivated silicon junction optimized for fast transient suppression in low-inductance surface-mount layouts. Its clamping behavior follows the 10/1000µs standard waveform per ANSI/IEEE C62.35, delivering 67.8V maximum clamping at 6.2A while maintaining <1µA reverse leakage above 38.1V.
Thermal derating begins above 25°C ambient per Fig.2, with full 400W peak power rated only at TA = 25°C. The device operates across –55°C to +150°C junction temperature range and meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 38.1 V - Maximum continuous reverse voltage before significant leakage; sets upper limit for protected circuit DC bias. |
| VBR @ IT=1mA | 42.3–51.7 V - Breakdown voltage tolerance band defining turn-on threshold under standardized 1mA test current. |
| VC @ IPPM=6.2A | 67.8 V - Clamped voltage during 10/1000µs surge; determines maximum stress on downstream ICs. |
| PPPM | 400 W - Peak pulse power handling per single non-repetitive event; defines transient energy absorption capacity. |
| IR @ VWM | <1 µA - Reverse leakage current at stand-off voltage; ensures minimal standby power loss and signal integrity. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in high-ambient industrial environments without thermal shutdown. |
| Response time | <1.0 ps - Junction switching speed; ensures suppression occurs before sensitive logic or analog circuitry is damaged. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-diode configuration with cathode band marking. Matte tin-plated leads meet J-STD-002 solderability; molding compound complies with UL 94V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input reference node for unidirectional clamping | Connected to protected line; conducts surge current to cathode when voltage exceeds VBR. |
| Cathode | Clamp return path / ground reference | Connected to system ground or lower-potential rail; completes transient current path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR performance and long-term reliability under thermal cycling and humidity exposure. |
| ISO 7637-2 compliance | Validated protection against automotive load-dump and inductive-switching transients (Pulse 1/2a/2b/3a/3b). |
| DO-214AC (SMA) footprint | Standardized 2-pin SMT package enabling automated placement and compatibility with existing PCB assembly lines. |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive; supports environmentally compliant industrial and automotive production. |
Applications
| Industrial DC/DC Converters | Automotive Body Control Modules |
|---|---|
Use Scenario: Protecting 48V-to-12V buck converter outputs from load dump and back-EMF spikes in factory automation systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between output rail and ground to clamp transients before they reach downstream PMICs or microcontrollers. Use Value: Limits voltage excursion to ≤67.8V during 400W surges, preventing latch-up or gate oxide damage in 12V-rated power management ICs. |
Use Scenario: Safeguarding LIN bus interface inputs in door module ECUs exposed to battery disconnect transients. IC Role / Device Role / Timing Role: Standoff protection device on LIN RX line, leveraging 38.1V VWM to avoid interference with 12V nominal signaling. Use Value: Sub-1ps response ensures clamping initiates before LIN transceiver input stages experience overstress during ISO 7637-2 Pulse 2b events. |
| LED Driver Power Inputs | Industrial PLC Digital I/O Channels |
Use Scenario: Suppressing inductive kickback from relay coils driving high-brightness LED strings in streetlight controllers. IC Role / Device Role / Timing Role: Parallel-connected TVS across relay coil supply rail to absorb stored magnetic energy during turn-off. Use Value: 400W peak power rating handles repetitive 8.3ms half-sine surges up to 40A without degradation, per JESD201 Class 2 whisker testing. |
Use Scenario: Protecting 24V digital input channels in programmable logic controllers from field-wiring ESD and surge coupling. IC Role / Device Role / Timing Role: Front-end transient suppressor on each isolated input channel, placed before optocoupler or Schmitt trigger input stage. Use Value: 1µA leakage at 38.1V ensures no false triggering of 24V logic thresholds while providing robust 67.8V clamping during 1kV/500A surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ47A (Bourns) | DO-214AA (SMB) package; 400W rating; VWM = 40.2V; VC = 64.8V at 6.4A | Slightly lower clamping voltage but larger footprint; requires PCB pad revision | Select when lower clamping voltage is prioritized and SMB layout space is available. |
| 1.5SMC47A (ON Semiconductor) | DO-214AB (SMC) package; 1500W rating; VWM = 40.2V; VC = 77.0V at 19.5A | Higher power handling but 3× larger footprint and higher clamping; suited for primary-side surge | Choose for front-end AC/DC input protection where higher energy absorption is required. |
Compared with P4SMA47C, SMBJ47A offers tighter clamping but demands board rework for DO-214AA pads, while 1.5SMC47A provides greater surge margin at the cost of size and clamping voltage - making P4SMA47C optimal for space-constrained secondary-side DC rail protection.
Availability
P4SMA47C is available at Aetrix Electronics and suitable for industrial DC/DC converters, automotive body control modules, and LED driver power inputs requiring stable component supply with full traceability and lifecycle support.
Supply support for P4SMA47C 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 P4SMA47C belongs to TSC's P4SMAxx family of 400W surface-mount TVS diodes engineered for robust transient immunity in space-constrained, high-reliability power conversion and interface protection applications.
FAQ
What is the polarity configuration of the P4SMA47C?
The P4SMA47C is a unidirectional TVS diode with anode and cathode terminals clearly marked by a cathode band on the DO-214AC (SMA) package. It conducts only during reverse overvoltage events - i.e., when cathode voltage exceeds anode voltage by ≥VBR. This configuration makes P4SMA47C suitable for DC rail protection where polarity is fixed and reverse conduction must be blocked during normal operation.
Does the P4SMA47C meet automotive transient standards?
Yes, the P4SMA47C meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a (sudden load removal), Pulse 2b (supply interruption), Pulse 3a (capacitive coupled noise), and Pulse 3b (ground bounce). Its 67.8V clamping voltage at 6.2A and sub-1ps response ensure compliance with these waveforms when correctly applied in automotive body electronics and power distribution modules.
What is the maximum operating temperature for the P4SMA47C?
The P4SMA47C has a specified junction temperature range of –55°C to +150°C, with absolute maximum ratings defined at TA = 25°C. Derating curves (Fig.2 in the datasheet) show that peak pulse power decreases linearly above 25°C ambient, reaching ~200W at 100°C ambient. The +150°C TJ max allows reliable operation in enclosed industrial enclosures or under-hood automotive locations with proper thermal design.
How does the P4SMA47C differ from the P4SMA47CA variant?
The P4SMA47C is unidirectional, while the P4SMA47CA is bidirectional - meaning it clamps symmetrically in both polarities. The CA version has identical VWM (38.1V), VBR (42.3–51.7V), and VC (67.8V) ratings but supports AC-coupled signals like RS-485, CAN, or audio lines where voltage swings above and below ground occur. Pinout and package are identical; only marking code and internal die structure differ.
Is the P4SMA47C halogen-free and RoHS compliant?
Yes, the P4SMA47C is certified halogen-free per IEC 61249-2-21 and RoHS compliant per EU Directive 2011/65/EU. The molding compound contains no brominated flame retardants or chlorine-based additives, and lead content is below 1000 ppm. These certifications are confirmed in TSC's official product documentation (Version S2102) and supported by material declarations available upon request.
P4SMA47C 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):
- 38.1V
- Voltage - Breakdown (Min):
- 42.3V
- Voltage - Clamping (Max) @ Ipp:
- 67.8V
- Current - Peak Pulse (10/1000µs):
- 6.2A
- 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)
P4SMA47C FAQ
1.How can I place an order for P4SMA47C through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA47C 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 P4SMA47C reliable?
The price and inventory of P4SMA47C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA47C is usually 5 days.
3.What payment methods are accepted for P4SMA47C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA47C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA47C?
P4SMA47C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA47C 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 P4SMA47C?
For technical support, including P4SMA47C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA47C requirements.
6.How does Aetrix verify that P4SMA47C is sourced from the original manufacturer or authorized distributors?
All P4SMA47C 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 P4SMA47C meets industry standards.
7.What is the process for return or replacement of P4SMA47C?
All P4SMA47C units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA47C, 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 P4SMA47C part is unused and in its original packaging.
Return procedure for P4SMA47C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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