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Taiwan Semiconductor Corporation P4SMA47
- Part No.:
- P4SMA47
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA47.pdf
- Description:
- 400W, 47V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:6,128
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Product details
Overview
P4SMA47 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power (10/1000μs), with a working stand-off voltage of 38.1V, breakdown voltage range 42.3–51.7V at 1mA, and clamping voltage of 67.8V at 6.2A. It protects DC/DC converters and SMPS input stages against ESD and surge events per ISO 7637-2.
For engineers reviewing the P4SMA47 datasheet, P4SMA47 pinout, P4SMA47 application, or P4SMA47 equivalent, key selection criteria include clamping voltage margin relative to protected IC VMAX, leakage current (<1μA at 38.1V), junction temperature rating (−55°C to +150°C), and compliance with automotive surge standards Pulse 1/2a/2b/3a/3b.
Technical Context
The P4SMA47 operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR (min 42.3V, max 51.7V at 1mA). Its glass-passivated junction ensures stable breakdown and low leakage (<1μA at VWM = 38.1V), while fast response (<1.0ps) enables effective suppression of ESD transients and load-dump spikes.
Designed for surface-mount automation, it uses matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. The DO-214AC case meets UL 94V-0 flammability and moisture sensitivity level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 38.1 V - Maximum continuous reverse operating voltage before conduction begins; sets upper limit for circuit operating voltage. |
| VBR @ IT=1mA | 42.3–51.7 V - Breakdown voltage range defining turn-on threshold; tight tolerance supports predictable protection timing. |
| VC @ IPPM=6.2A | 67.8 V - Clamped voltage during 10/1000μs surge; determines maximum stress on downstream components. |
| PPPM | 400 W - Peak pulse power handling (10/1000μs waveform); defines surge energy absorption capability. |
| IR @ VWM | <1 μA - Reverse leakage at stand-off voltage; ensures minimal standby power loss and signal integrity. |
| TJ Range | −55°C to +150°C - Operating junction temperature range; supports under-hood and industrial ambient conditions. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-diode configuration with cathode band marking. Case meets UL 94V-0; terminals are matte tin-plated, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in unidirectional TVS configuration. |
| Cathode | Reverse-biased protection terminal | Connected to protected line (e.g., 48V rail); conducts only when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR over temperature and lifetime, with <1μA leakage at VWM. |
| Fast response time | <1.0 ps - Enables suppression of sub-nanosecond ESD events before sensitive ICs are damaged. |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling), critical for automotive ECUs. |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement before reflow; simplifies SMT manufacturing flow. |
Applications
| Switching Mode Power Supply (SMPS) | On-board DC/DC Converter |
|---|---|
Use Scenario: Input stage of 36–48V industrial SMPS subjected to load dump and ESD. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient overvoltage on primary-side bus before rectifier and controller IC. Use Value: Limits peak voltage to 67.8V during 400W surges, protecting MOSFETs and PWM controllers rated ≤80V. | Use Scenario: 48V-to-12V buck converter in telecom shelf management unit. IC Role / Device Role / Timing Role: Standoff protection on high-side input rail, activated within <1ps to clamp ISO 7637-2 Pulse 1 (100V/100ms). Use Value: Maintains VWM = 38.1V margin below nominal 48V rail, ensuring no false triggering during normal operation. |
| Automotive Body Control Module | LED Driver Power Input |
Use Scenario: LIN bus power rail (12V) in BCM exposed to battery disconnect transients. IC Role / Device Role / Timing Role: Primary surge clamp on fused 12V supply feeding LIN transceivers and microcontrollers. Use Value: Withstands 40A IFSM (8.3ms half-sine) and clamps to ≤67.8V, preserving 16V-rated MCU I/O pins. | Use Scenario: Constant-current LED driver input in streetlight fixture with long cable runs. IC Role / Device Role / Timing Role: First-line defense against induced lightning surges on 36–48V DC input lines. Use Value: 400W PPPM rating absorbs multi-joule transients; RoHS/halogen-free construction meets outdoor lighting environmental requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | DO-214AA package, 43V VWM, 69.4V VC @ 5.8A, same 400W rating | Slightly higher clamping voltage (+1.6V) and lower IPPM (5.8A vs. 6.2A); identical surge standard coverage | Select SMBJ43A if board layout accommodates larger DO-214AA footprint and tighter VC margin is acceptable. |
| 1.5SMC47A | DO-214AB package, 47V VWM, 77.0V VC @ 5.2A, 1500W rating (10/1000μs) | Higher clamping voltage (+9.2V) but greater energy handling; not drop-in due to larger body and different thermal profile | Choose 1.5SMC47A only when system-level surge energy exceeds 400W and PCB space allows DO-214AB mounting. |
Compared with P4SMA47, SMBJ43A offers near-identical electrical performance in a slightly larger package, while 1.5SMC47A trades higher clamping for significantly greater surge capacity-neither is pin-compatible, but both serve overlapping protection roles in 36–48V systems.
Availability
P4SMA47 is available at Aetrix Electronics and suitable for switching mode power supplies, automotive body control modules, and LED driver power inputs requiring stable component supply across industrial and transportation OEM programs.
Supply support for P4SMA47 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 since 1979.
The P4SMA series targets cost-sensitive, high-volume surge protection applications in automotive, industrial, and consumer power systems, emphasizing AEC-Q200 readiness, automated assembly compatibility, and ISO 7637-2 compliance.
FAQ
What is the maximum clamping voltage of the P4SMA47 under standard 10/1000μs surge conditions?
The P4SMA47 has a maximum clamping voltage (VC) of 67.8 V when subjected to its rated peak pulse current of 6.2 A using the 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events. The P4SMA47 maintains this clamping performance across its full operating temperature range.
Is the P4SMA47 suitable for bidirectional transient suppression?
No, the P4SMA47 is a unidirectional TVS diode intended for DC line protection with defined anode-cathode polarity. For bidirectional applications such as AC lines or data buses, the P4SMA47A variant or dedicated bipolar parts like P4SMA47CA must be used. The P4SMA47 datasheet explicitly specifies cathode band marking and forward voltage (VF = 3.5 V at 25 A), confirming its unidirectional design.
What is the leakage current specification for the P4SMA47 at its working stand-off voltage?
The P4SMA47 exhibits a maximum reverse leakage current (IR) of 1 μA when biased at its working stand-off voltage (VWM) of 38.1 V, tested at TA = 25°C. This ultra-low leakage ensures minimal power loss in always-on systems and prevents unintended biasing of downstream circuitry, making the P4SMA47 appropriate for battery-backed and energy-sensitive designs.
Does the P4SMA47 meet automotive surge immunity standards?
Yes, the P4SMA47 is specified to meet ISO 7637-2 for automotive transient immunity, covering Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling). Its 400W peak pulse power rating, −55°C to +150°C operating range, and glass-passivated junction support deployment in engine control units, body control modules, and infotainment power rails without derating.
What packaging and reel quantity is offered for the P4SMA47?
The P4SMA47 is supplied in DO-214AC (SMA) package on tape-and-reel format, with 7,500 units per reel. This packaging supports high-speed pick-and-place assembly and complies with J-STD-020 moisture sensitivity level 1, eliminating bake requirements prior to reflow. The cathode band marking and matte tin-plated leads ensure reliable solder joint formation per J-STD-002.
P4SMA47 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):
- 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)
P4SMA47 FAQ
1.How can I place an order for P4SMA47 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA47 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 P4SMA47 reliable?
The price and inventory of P4SMA47 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA47 is usually 5 days.
3.What payment methods are accepted for P4SMA47?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA47 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA47?
P4SMA47 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA47 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 P4SMA47?
For technical support, including P4SMA47 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA47 requirements.
6.How does Aetrix verify that P4SMA47 is sourced from the original manufacturer or authorized distributors?
All P4SMA47 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 P4SMA47 meets industry standards.
7.What is the process for return or replacement of P4SMA47?
All P4SMA47 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA47, 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 P4SMA47 part is unused and in its original packaging.
Return procedure for P4SMA47:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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