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Vishay General Semiconductor - Diodes Division P4SMA47A-E3/5A
- Part No.:
- P4SMA47A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA47A-E3/5A.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,316
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Product details
Overview
P4SMA47A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMA (DO-214AC) package, designed for clamping transient overvoltages on power and signal lines. It features a 47 V breakdown voltage (VBR = 44.7–49.4 V at IT = 1.0 mA), 40.2 V maximum standoff voltage (VWM), 64.8 V clamping voltage (VC) at 6.2 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and telecom systems.
For engineers reviewing the P4SMA47A-E3/5A datasheet, P4SMA47A-E3/5A pinout, P4SMA47A-E3/5A application, or P4SMA47A-E3/5A equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, RoHS-compliant commercial-grade construction, and direct alternatives for ESD and lightning-induced transient protection design.
Technical Context
The P4SMA47A-E3/5A operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling precise clamping during fast transients (response time < 1 ns). The device is rated for repetitive 400 W pulses at TA = 25 °C, derating linearly above 25 °C per Fig. 2 in the datasheet.
Mounted on 0.2" × 0.2" copper pads, it achieves 120 °C/W junction-to-ambient thermal resistance (RθJA) and supports 40 A non-repetitive forward surge current (IFSM). Its cathode-band polarity marking aligns with standard SMA (DO-214AC) orientation, and it meets J-STD-020 MSL Level 1 with 260 °C reflow peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 44.7 V / 49.4 V at IT = 1.0 mA - defines reliable conduction onset under transient stress |
| VWM | 40.2 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 64.8 V at 6.2 A - clamped voltage during 10/1000 µs surge, limiting downstream component stress |
| PPPM | 400 W - peak pulse power handling capability, critical for lightning and inductive-switching surge immunity |
| IFSM | 40 A - single half-sine surge current rating (8.3 ms), supporting high-energy fault events |
| TJ max | +150 °C - maximum junction temperature, enabling operation in harsh ambient environments |
| RθJA | 120 °C/W - thermal resistance defining required PCB copper area for sustained power dissipation |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by black band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to protected line ground or low-side return path in unidirectional clamp configuration |
| Cathode | Clamping output / Surge current sink | Connected to protected IC input or power rail; conducts surge current to ground when VREV > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without failure |
| Glass-passivated junction | Ensures stable VBR over temperature and lifetime, minimizing parameter drift in automotive/industrial use |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow assembly without preconditioning or special handling |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental compliance requirements without halogen restrictions or AEC-Q101 overhead |
| Low incremental surge resistance | Reduces clamping overshoot during fast-rising transients (< 1 ns response), improving system-level ESD immunity |
Applications
| Industrial Motor Control | Automotive Sensor Interface |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O pins from inductive kickback during relay or solenoid switching in PLCs and drives. IC Role / Device Role / Timing Role: Unidirectional TVS placed between MOSFET gate and source, clamping voltage spikes before they exceed gate oxide breakdown limits. Use Value: Limits VGS to ≤64.8 V during 400 W surges, preventing permanent gate oxide damage and ensuring long-term reliability under repeated switching cycles. |
Use Scenario: Shielding analog front-end inputs of pressure, temperature, or position sensors from load-dump and jump-start transients in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Standoff-clamp element on sensor supply rail (VSUPPLY), activated only during overvoltage events exceeding 40.2 V. Use Value: Maintains sensor functionality during 100 V/50 ms load-dump events by clamping rail voltage to 64.8 V, avoiding brownout resets or ADC saturation. |
| Telecom Power Input | Consumer USB Port Protection |
Use Scenario: Secondary-stage surge suppression on AC/DC adapter outputs feeding base station RF modules or Ethernet PHYs. IC Role / Device Role / Timing Role: Final-line defense after bulk MOV or GDT, absorbing residual energy that passes through primary protection. Use Value: Handles up to 6.2 A transient current while holding output voltage below 65 V, preserving sensitive RF IC bias rails and clock buffers. |
Use Scenario: Overvoltage guard on VBUS line of USB 2.0 host ports exposed to accidental 12 V adapter misconnection or ESD events. IC Role / Device Role / Timing Role: Fast-acting clamp between VBUS and GND, triggered within nanoseconds of overvoltage onset. Use Value: Clamps 15 kV contact ESD (IEC 61000-4-2) to <65 V in <1 ns, preventing latch-up or damage to USB transceivers and PMICs. |
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 | Same VBR range (44.7–49.4 V), but SMB (DO-214AA) package - 2.5 mm wider body, higher RθJA (100 °C/W), 600 W PPPM | Better suited for higher-power board-level protection where space allows larger footprint and enhanced thermal mass | Select SMBJ47A when PCB layout permits larger pad area and system-level surge requirements exceed 400 W |
| 1.5SMC47A | Same VBR, but SMC (DO-214AB) package - 3.5 mm wide, RθJA = 60 °C/W, 1500 W PPPM, higher IPPM (32.3 A) | Targeted at primary-level protection in power supplies or DC distribution networks requiring higher energy absorption | Choose 1.5SMC47A for front-end AC/DC input stages or battery-fed systems needing >1 kW surge headroom |
Compared with P4SMA47A-E3/5A, SMBJ47A offers higher pulse power in a slightly larger footprint, while 1.5SMC47A provides threefold energy capacity in a significantly larger package - making P4SMA47A-E3/5A optimal for space-constrained secondary-side protection where 400 W suffices and thermal management relies on minimal copper area.
Availability
P4SMA47A-E3/5A is available at Aetrix Electronics and suitable for industrial motor control, automotive sensor interface, telecom power input, and consumer USB port protection requiring stable component supply, RoHS-compliant commercial-grade sourcing, and consistent tape-and-reel delivery in 7500-unit reels (13" diameter).
Supply support for P4SMA47A-E3/5A 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific optimization.
The P4SMA Series is engineered for cost-effective, surface-mount transient suppression in commercial-grade power and signal line protection - balancing clamping accuracy, surge robustness, and automated assembly compatibility across consumer, industrial, and telecom end equipment.
FAQ
What is the breakdown voltage tolerance of the P4SMA47A-E3/5A?
The P4SMA47A-E3/5A has a specified breakdown voltage range of 44.7 V to 49.4 V at test current IT = 1.0 mA, corresponding to a ±5% tolerance around the nominal 47 V rating. This tight VBR spread ensures predictable clamping onset across production lots and enables accurate system-level overvoltage margining in designs using the P4SMA47A-E3/5A.
Does the P4SMA47A-E3/5A meet automotive qualification standards?
No, the P4SMA47A-E3/5A is a commercial-grade part with E3 suffix (RoHS-compliant, non-halogen, MSL Level 1). For AEC-Q101 qualification, Vishay offers the P4SMA47AHE3_A variant - the P4SMA47A-E3/5A itself lacks automotive qualification and must not be used in safety-critical vehicle subsystems without additional validation.
What is the maximum clamping voltage of the P4SMA47A-E3/5A under surge conditions?
The P4SMA47A-E3/5A exhibits a maximum clamping voltage (VC) of 64.8 V at peak pulse current IPPM = 6.2 A, measured with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during standardized surge events and is critical for verifying compatibility with downstream IC absolute maximum ratings in designs using the P4SMA47A-E3/5A.
Can the P4SMA47A-E3/5A be used in bidirectional configurations?
No - the P4SMA47A-E3/5A is strictly unidirectional, indicated by the "A" suffix and cathode band marking. Bidirectional variants use the "CA" suffix (e.g., P4SMA47CA). Using the P4SMA47A-E3/5A in reverse-biased signal paths risks permanent conduction or failure; correct polarity alignment is mandatory for proper transient suppression function.
What is the thermal resistance of the P4SMA47A-E3/5A, and how does it affect PCB layout?
The P4SMA47A-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value requires designers to allocate sufficient copper area to dissipate 3.3 W continuous power (PD) without exceeding +150 °C junction temperature - undersized pads will cause thermal runaway during sustained overvoltage events involving the P4SMA47A-E3/5A.
P4SMA47A-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA, TransZorb®
- 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):
- 6.2A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA47A-E3/5A FAQ
1.How can I place an order for P4SMA47A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA47A-E3/5A 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-E3/5A reliable?
The price and inventory of P4SMA47A-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA47A-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA47A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA47A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA47A-E3/5A?
P4SMA47A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA47A-E3/5A 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-E3/5A?
For technical support, including P4SMA47A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA47A-E3/5A requirements.
6.How does Aetrix verify that P4SMA47A-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA47A-E3/5A 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-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA47A-E3/5A?
All P4SMA47A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA47A-E3/5A, 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-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA47A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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