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Taiwan Semiconductor Corporation P4SMA47H
- Part No.:
- P4SMA47H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA47H.pdf
- Description:
- 400W, 47V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,827
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Product details
Overview
P4SMA47H from Taiwan Semiconductor is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode with a breakdown voltage range of 42.3–51.7V, clamping voltage of 67.8V at 6.2A peak pulse current, and DO-214AC (SMA) package. It protects DC/DC converters, automotive power supplies, and industrial adapters against ESD and lightning-induced surges per ISO 7637-2 Pulse 1/2a/2b/3a/3b.
For engineers reviewing the P4SMA47H datasheet, P4SMA47H pinout, P4SMA47H application, or P4SMA47H equivalent, key selection criteria include its 38.1V working stand-off voltage, <1μA reverse leakage at VWM, 150°C junction rating, AEC-Q101 qualification, and fast sub-1ps response time in surge suppression circuits.
Technical Context
The P4SMA47H operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve stable breakdown and low capacitance. Its clamping behavior follows the 10/1000μs standard waveform, delivering 67.8V maximum clamping voltage at 6.2A peak impulse current while maintaining <1μA leakage above 38.1V.
Designed for automotive-grade reliability, it meets AEC-Q101 stress tests and ISO 7637-2 transients across all five pulse types. The device's thermal derating curve supports continuous operation up to 150°C junction temperature, with moisture sensitivity level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 42.3V / 51.7V - Ensures reliable avalanche initiation within defined tolerance band at 1mA test current |
| VWM | 38.1V - Maximum continuous reverse operating voltage before significant leakage begins |
| IPPM | 6.2A - Peak surge current handled under 10/1000μs waveform without failure |
| VC@IPPM | 67.8V - Clamped voltage seen by protected circuit during worst-case surge event |
| PPPM | 400W - Peak pulse power dissipation capability at TA = 25°C |
| TJ max | 150°C - Maximum allowable junction temperature for sustained reliability |
| IR@VWM | <1μA - Ultra-low leakage preserves system standby power integrity |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability; weight ≈0.060g; UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side of protected line; conducts during forward surge or bias |
| Cathode | Avalanche clamping node | Connected to higher-potential side; initiates controlled breakdown when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive power electronics including engine control units and body modules |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and leakage under thermal cycling and humidity |
| Fast response time <1ps | Clamps ESD events before sensitive downstream ICs experience overstress |
| ISO 7637-2 compliance | Withstands automotive load dump and switching transients without degradation |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking or special handling |
Applications
| Automotive Power Supply Protection | Industrial DC/DC Converter Input |
|---|---|
Use Scenario: Protecting 48V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping node placed between input rail and ground. Use Value: Limits voltage to ≤67.8V during 10/1000μs pulses, preventing MOSFET gate oxide rupture and controller latch-up. | Use Scenario: Safeguarding isolated flyback converter primary-side rectifier from reflected surge energy. IC Role / Device Role / Timing Role: Standoff protector on high-voltage DC bus prior to transformer input. Use Value: Maintains 38.1V working voltage margin while absorbing 400W peak surges without thermal runaway. |
| LED Driver Overvoltage Clamp | Telecom Adapter Surge Suppression |
Use Scenario: Preventing overvoltage damage to constant-current LED drivers during hot-swap or cable discharge events. IC Role / Device Role / Timing Role: Reverse-biased clamp across driver output terminals. Use Value: Sub-1ps response ensures clamping occurs before driver IC internal protection triggers, reducing failure rate. | Use Scenario: Shielding AC/DC adapter secondary-side outputs from conducted surges entering via mains or data lines. IC Role / Device Role / Timing Role: Final-stage TVS on regulated 12V/24V output rail. Use Value: <1μA leakage at 38.1V prevents standby current increase; RoHS/halogen-free construction meets global safety 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 | 600W rating, SMB package (larger footprint), 64.8V clamping at 9.3A | Better suited for higher-energy surges; requires PCB layout change due to larger package | Select when system-level surge testing exceeds IEC 61000-4-5 Level 4 and DO-214AC thermal limits are insufficient |
| 1.5SMC47A | 1500W rating, SMC package, 67.2V clamping at 22.3A, higher VWM (40.2V) | Designed for front-end AC input stages; not AEC-Q101 qualified | Choose for non-automotive industrial mains input protection where space allows larger SMC footprint |
Compared with SMBJ47A and 1.5SMC47A, the P4SMA47H offers optimal balance of AEC-Q101 compliance, compact DO-214AC footprint, and precise 38.1V standoff for mid-power automotive and industrial DC rails-without requiring PCB redesign or sacrificing reliability.
Availability
P4SMA47H is available at Aetrix Electronics and suitable for automotive power modules, industrial DC/DC converters, and LED lighting systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for P4SMA47H 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, serving automotive, industrial, and consumer markets since 1979.
The P4SMA47H belongs to TSC's AEC-Q101-qualified P4SMAxH series of surface-mount TVS diodes, engineered specifically for robust transient suppression in harsh automotive and industrial environments where reliability and standardized surge immunity are mandatory.
FAQ
What is the breakdown voltage range of the P4SMA47H?
The P4SMA47H has a guaranteed breakdown voltage range of 42.3V to 51.7V at 1mA test current (VBR), measured per ANSI/IEEE C62.35 standards. This range reflects manufacturing tolerance and ensures consistent clamping performance across production lots. The P4SMA47H maintains this specification under ambient temperatures from –55°C to +150°C.
Is the P4SMA47H suitable for automotive applications?
Yes, the P4SMA47H is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements. Its glass-passivated junction, 150°C maximum junction temperature, and moisture sensitivity level 1 make it appropriate for under-hood and body-control module applications. The P4SMA47H is designed for automotive-grade durability without derating.
What is the clamping voltage of the P4SMA47H under surge conditions?
The P4SMA47H delivers a maximum clamping voltage (VC) of 67.8V at 6.2A peak pulse current using the standardized 10/1000μs waveform. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during surge events. The P4SMA47H maintains this clamping performance across its full operating temperature range.
Does the P4SMA47H have polarity markings, and how is it oriented on the PCB?
Yes, the P4SMA47H features a cathode band marking on the DO-214AC (SMA) package body, indicating the cathode terminal. During PCB layout, the cathode must be connected to the higher-potential side of the protected line (e.g., VIN), while the anode connects to ground or lower potential. Incorrect orientation renders the P4SMA47H ineffective for reverse-transient suppression.
What packaging and reel quantity is available for the P4SMA47H?
The P4SMA47H is supplied in tape-and-reel format with 7,500 units per reel, compatible with standard high-speed SMT pick-and-place equipment. The DO-214AC (SMA) package uses matte tin-plated leads meeting J-STD-002 solderability requirements, and the reel labeling includes full part number, date code, and factory code per TSC's ordering specification.
P4SMA47H 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA47H FAQ
1.How can I place an order for P4SMA47H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA47H 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 P4SMA47H reliable?
The price and inventory of P4SMA47H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA47H is usually 5 days.
3.What payment methods are accepted for P4SMA47H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA47H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA47H?
P4SMA47H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA47H 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 P4SMA47H?
For technical support, including P4SMA47H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA47H requirements.
6.How does Aetrix verify that P4SMA47H is sourced from the original manufacturer or authorized distributors?
All P4SMA47H 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 P4SMA47H meets industry standards.
7.What is the process for return or replacement of P4SMA47H?
All P4SMA47H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA47H, 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 P4SMA47H part is unused and in its original packaging.
Return procedure for P4SMA47H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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