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Taiwan Semiconductor Corporation P4SMA82
- Part No.:
- P4SMA82
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA82.pdf
- Description:
- 400W, 82V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,120
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Product details
Overview
P4SMA82 from Taiwan Semiconductor is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for overvoltage protection of DC power rails and signal lines. It features a breakdown voltage range of 73.8–90.2 V at 1 mA test current, clamps transients to ≤118 V at 3.5 A peak impulse current (10/1000 µs), and operates across –55°C to +150°C junction temperature - used in onboard DC/DC converters and industrial SMPS inputs.
For engineers reviewing the P4SMA82 datasheet, P4SMA82 pinout, P4SMA82 application, or P4SMA82 equivalent, key selection criteria include its 66.4 V working stand-off voltage, <1 µA reverse leakage at VWM, ±0.105 %/°C VBR temperature coefficient, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and UL 94V-0 molded compound - all critical for automotive and industrial surge immunity design.
Technical Context
The P4SMA82 employs a glass-passivated silicon junction optimized for fast transient response (<1.0 ps typical), low capacitance, and stable clamping under repetitive surge stress. Its unidirectional configuration provides asymmetric protection with cathode-anode polarity marking and forward voltage ≤3.5 V at 25 A surge.
It is rated for 400 W peak pulse power (10/1000 µs waveform), derates linearly above 25°C ambient per Fig.2, and supports 40 A non-repetitive forward surge (8.3 ms half-sine). The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 66.4 V - maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected circuit DC rail. |
| VBR min/max | 73.8 V / 90.2 V at 1 mA - guaranteed breakdown window ensures reliable triggering across process and temperature variation. |
| VC@IPPM | 118 V at 3.5 A (10/1000 µs) - clamping voltage defines worst-case overvoltage seen by downstream ICs during surge events. |
| IR@VWM | <1 µA - ultra-low leakage preserves efficiency in high-impedance bias networks and battery-powered systems. |
| TJ max | +150°C - enables operation in under-hood automotive, industrial motor drives, and enclosed power supplies without thermal derating. |
| Package | DO-214AC (SMA) - industry-standard SMD outline with 0.060 g mass, matte tin-plated leads, and UL 94V-0 flammability rating. |
Pinout & Package
DO-214AC (SMA) surface-mount package with axial lead configuration: Cathode marked by band on body; anode and cathode terminals aligned along package centerline. Leads are matte tin-plated per J-STD-002 for reliable solder wetting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VLINE exceeds VBR. |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping loop during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR and low leakage over lifetime, even under humidity and thermal cycling stress. |
| Fast response time <1.0 ps | Clamps ESD and lightning-induced transients before sensitive downstream logic or analog circuits are damaged. |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive load-dump and supply-line transient immunity per OEM requirements. |
| Moisture Sensitivity Level 1 | Zero bake requirement before reflow; compatible with standard SMT assembly processes without floor-life constraints. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally restricted materials. |
Applications
| On-board DC/DC Converter Protection | Industrial Switching Power Supply Input |
|---|---|
Use Scenario: Protects primary-side MOSFET gate drivers and controller ICs from switching-induced voltage spikes in isolated flyback or forward converters. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and ground, clamping overshoots exceeding 66.4 V within sub-nanosecond response window. Use Value: Prevents cumulative gate oxide damage and latch-up in PWM controllers by limiting transient voltage to ≤118 V at 3.5 A surge. |
Use Scenario: Shields rectified AC/DC front-end stages against line surges, load dump, and inductive kickback in factory automation PSUs. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted across bulk capacitor input, absorbing 400 W pulses without degradation over >10,000 cycles. Use Value: Maintains system uptime by preventing fuse blowing or capacitor rupture during 10/1000 µs transients up to 3.5 A peak current. |
| Automotive Body Control Module (BCM) Power Rail | LED Driver Power Input Protection |
Use Scenario: Secures 12 V supply to microcontrollers and CAN transceivers in BCMs exposed to ISO 7637-2 Pulse 2b (battery disconnect) and Pulse 5a (load dump). IC Role / Device Role / Timing Role: Unidirectional clamping device referenced to chassis ground, activated only during positive transients above 73.8 V. Use Value: Ensures functional safety compliance by holding MCU VDD below absolute maximum rating during 100 V/100 ms load dump events. |
Use Scenario: Guards constant-current LED driver ICs from inrush and hot-swap transients in architectural lighting systems. IC Role / Device Role / Timing Role: Mounted at DC input stage to absorb energy from cable discharge events and inductive turn-off spikes. Use Value: Extends LED system lifetime by eliminating premature failure of driver FETs and current-sense resistors via sub-118 V clamping ceiling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ80A (Bourns) | 80 V standoff, bidirectional, DO-214AA package, 600 W rating | Supports AC-coupled or dual-polarity protection; larger footprint than SMA | Select when bidirectional clamping or higher power margin is required; verify PCB pad compatibility with DO-214AA. |
| 1.5SMC82A (ON Semiconductor) | 82 V standoff, unidirectional, DO-214AB package, 1500 W rating | Higher surge capacity but larger case size and higher leakage (~5 µA @ VWM) | Choose for extreme surge environments (e.g., outdoor telecom); requires layout revision due to SMC outline. |
Compared with SMBJ80A and 1.5SMC82A, the P4SMA82 offers optimal balance of compact DO-214AC footprint, precise 66.4 V stand-off, and 400 W capability - making it ideal for space-constrained industrial DC/DC modules where unidirectional protection suffices and thermal budget is limited.
Availability
P4SMA82 is available at Aetrix Electronics and suitable for switching mode power supplies, onboard DC/DC converters, and lighting applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for P4SMA82 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs since 1979.
The P4SMA82 belongs to TSC's P4SMAx series of 400 W surface-mount TVS diodes, engineered for robust transient immunity in automotive, industrial, and consumer power systems where reliability under surge stress is critical.
FAQ
What is the polarity configuration of the P4SMA82?
The P4SMA82 is a unidirectional TVS diode with cathode indicated by a band on the DO-214AC (SMA) package body. It conducts only during positive transients relative to its anode terminal and must be oriented with cathode toward the protected line and anode to ground. This configuration ensures low leakage and precise clamping behavior consistent with its 66.4 V working stand-off voltage specification.
Does the P4SMA82 meet automotive surge immunity standards?
Yes, the P4SMA82 meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for electrical disturbances in road vehicles. Its 400 W peak pulse power rating, 118 V clamping voltage at 3.5 A, and –55°C to +150°C operating range make it suitable for protecting ECUs, BCMs, and infotainment power rails against load dump and supply transients in 12 V automotive systems.
What is the maximum clamping voltage of the P4SMA82 under standard test conditions?
The maximum clamping voltage of the P4SMA82 is 118 V when subjected to a 10/1000 µs impulse current waveform at 3.5 A peak amplitude. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Can the P4SMA82 be used in bidirectional protection applications?
No, the P4SMA82 is strictly unidirectional and not rated for reverse conduction. For bidirectional protection, select the P4SMA82A variant (which shares the same VWM and VC but is specified for symmetrical clamping) or dedicated bidirectional parts like SMBJ80A. Using P4SMA82 in reverse-biased configurations risks excessive leakage and unreliable clamping.
What is the moisture sensitivity level (MSL) and reflow profile compatibility of the P4SMA82?
The P4SMA82 has a Moisture Sensitivity Level (MSL) of 1 per J-STD-020, meaning it is not moisture-sensitive and requires no baking prior to reflow soldering. It is compatible with standard lead-free reflow profiles (peak temperature ≤260°C), and its matte tin-plated leads comply with J-STD-002 for solderability assurance in automated SMT assembly lines.
P4SMA82 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):
- 66.4V
- Voltage - Breakdown (Min):
- 73.8V
- Voltage - Clamping (Max) @ Ipp:
- 118V
- Current - Peak Pulse (10/1000µs):
- 3.5A
- 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)
P4SMA82 FAQ
1.How can I place an order for P4SMA82 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA82 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 P4SMA82 reliable?
The price and inventory of P4SMA82 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA82 is usually 5 days.
3.What payment methods are accepted for P4SMA82?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA82 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA82?
P4SMA82 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA82 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 P4SMA82?
For technical support, including P4SMA82 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA82 requirements.
6.How does Aetrix verify that P4SMA82 is sourced from the original manufacturer or authorized distributors?
All P4SMA82 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 P4SMA82 meets industry standards.
7.What is the process for return or replacement of P4SMA82?
All P4SMA82 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA82, 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 P4SMA82 part is unused and in its original packaging.
Return procedure for P4SMA82:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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