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Vishay General Semiconductor - Diodes Division P4SMA82A-E3/5A
- Part No.:
- P4SMA82A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA82A-E3/5A.pdf
- Description:
- TVS DIODE 70.1VWM 113VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,425
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Product details
Overview
P4SMA82A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 77.9 V minimum breakdown voltage (VBR), 70.1 V standoff voltage (VWM), 113 V maximum clamping voltage (VC) at 3.5 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 power supplies.
For engineers reviewing the P4SMA82A-E3/5A datasheet, P4SMA82A-E3/5A pinout, P4SMA82A-E3/5A application, or P4SMA82A-E3/5A equivalent, key selection criteria include clamping voltage margin relative to protected circuit's absolute maximum rating, thermal resistance (120 °C/W junction-to-ambient), RoHS-compliant matte tin plating, and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
This unidirectional TVS operates by avalanche breakdown above its standoff voltage, providing low-impedance shunt path during transient events. Its glass-passivated junction ensures stable leakage (<1 µA at 70.1 V) and fast response time (<1 ns), while MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
The device delivers 400 W peak pulse power (derated to 300 W above 91 V) under 10/1000 µs waveform, with 0.105 %/°C temperature coefficient of VBR and 30 °C/W junction-to-lead thermal resistance - enabling reliable operation up to 150 °C junction temperature in compact layouts with minimal copper pad area (0.2" × 0.2").
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70.1 V - maximum continuous reverse operating voltage before conduction begins; sets upper limit for normal circuit operation. |
| VBR (min/max) | 77.9 V / 86.1 V at 1 mA - defines guaranteed avalanche initiation range; critical for margining against overvoltage thresholds. |
| VC @ IPPM | 113 V at 3.5 A - clamped voltage during 10/1000 µs surge; determines worst-case stress on downstream components. |
| PPPM | 400 W - peak pulse power handling capability; defines transient energy absorption capacity under standardized waveform. |
| IFSM | 40 A - non-repetitive forward surge current rating (8.3 ms half-sine); relevant for fault-current limiting in DC power rails. |
| TJ max | 150 °C - maximum junction temperature; constrains thermal design when mounted on minimal copper pads. |
| RθJA | 120 °C/W - junction-to-ambient thermal resistance; dictates required board-level 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; polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to lower-potential side of protected line; forms shunt path to ground during reverse overvoltage. |
| Cathode | Avalanche conduction terminal | Marked end; connected to higher-potential side (e.g., VCC, signal line); conducts when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 3 surges (1 kV/2 Ω) without derating on standard PCB pads. |
| Glass-passivated junction | Ensures stable leakage current (<1 µA at VWM) and long-term reliability under thermal cycling and humidity exposure. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free assembly without popcorn cracking or delamination in high-volume SMT lines. |
| AEC-Q101 qualified option available | HE3/HM3 variants meet automotive-grade stress testing; P4SMA82A-E3/5A is commercial-grade but shares identical die and package. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD, inductive switch-off), improving system immunity margin. |
Applications
| Industrial Power Supply Protection | Automotive Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppresses load-dump and alternator ripple transients on 24 V DC input rails of PLC modules and motor drives. IC Role / Device Role: Unidirectional shunt clamp placed between VIN and GND, absorbing energy from >100 V spikes. Use Value: Limits voltage seen by downstream DC-DC controllers to ≤113 V, preventing latch-up or gate oxide damage in 36 V-rated ICs. |
Use Scenario: Shields LIN bus transceivers and Hall-effect sensors from ESD and cable discharge events in engine control units. IC Role / Device Role: Connected anode-to-ground, cathode-to-signal line; clamps negative transients and positive surges. Use Value: Maintains signal integrity below ±30 V common-mode range while surviving 8 kV contact ESD per ISO 10605. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Control |
|
Use Scenario: Guards Ethernet PHY power pins and auxiliary bias rails against lightning-induced surges in outdoor base stations. IC Role / Device Role: Mounted adjacent to PoE controller ICs; absorbs 10/1000 µs surges coupled via transformer windings. Use Value: Achieves <113 V clamping at 3.5 A, ensuring protected ASICs remain within 12 V absolute maximum rating with safety margin. |
Use Scenario: Protects microcontroller GPIOs and H-bridge gate drivers from back-EMF spikes generated by brushed DC motors in washing machines. IC Role / Device Role: Placed across motor terminals and across driver supply rails to clamp bidirectional inductive kickback. Use Value: Withstands 40 A single-half-sine surge (8.3 ms), preventing destructive latch-up in 5 V logic circuits during stall conditions. |
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) | Same 80 V VWM, but SMB package (DO-214AA); 600 W PPPM, 125 °C/W RθJA, 118 V VC @ 3.4 A | Larger footprint; better power handling but higher thermal resistance limits use in dense layouts | Select when higher surge margin is needed and board space allows larger SMB package |
| 1.5SMC82A (ON Semiconductor) | Identical VWM/VBR/VC specs; same SMA package; 400 W PPPM; 125 °C/W RθJA; RoHS-compliant but not AEC-Q101 qualified | Same board footprint and electrical behavior; slightly higher thermal resistance affects sustained duty-cycle performance | Choose for cost-sensitive industrial designs where AEC-Q101 qualification is unnecessary |
Compared with P4SMA82A-E3/5A, SMBJ80A offers higher surge power but requires more PCB area and has inferior thermal performance, while 1.5SMC82A matches electrical specs and footprint but lacks Vishay's MSL Level 1 process assurance and tighter VBR tolerance.
Availability
P4SMA82A-E3/5A is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, telecom line cards, and consumer appliance motor controls requiring stable component supply with full traceability and volume scalability.
Supply support for P4SMA82A-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, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The P4SMA Series targets cost-effective, high-volume transient suppression in space-constrained applications - engineered for automated SMT assembly, consistent clamping performance, and compliance with commercial and automotive environmental standards.
FAQ
What is the maximum clamping voltage of the P4SMA82A-E3/5A under a 10/1000 µs surge?
The P4SMA82A-E3/5A exhibits a maximum clamping voltage (VC) of 113 V when subjected to its rated peak pulse current of 3.5 A under the standardized 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88367 and represents the worst-case voltage imposed on protected circuitry during transient events. Engineers must verify that this clamping level remains safely below the absolute maximum ratings of downstream components such as MOSFETs or interface ICs. The P4SMA82A-E3/5A maintains this performance across its specified operating temperature range.
Is the P4SMA82A-E3/5A suitable for automotive applications?
The P4SMA82A-E3/5A itself is a commercial-grade part (E3 suffix), not AEC-Q101 qualified. However, Vishay offers the functionally identical P4SMA82AHE3_A variant (HE3 suffix) which is AEC-Q101 qualified for automotive use. The P4SMA82A-E3/5A shares the same die, SMA package, and electrical characteristics but lacks the extended stress testing required for automotive qualification. For non-safety-critical subsystems like infotainment power rails, P4SMA82A-E3/5A may be used with customer validation; for engine control or ADAS systems, the HE3 version is mandatory. Both parts use the same P4SMA82A-E3/5A marking code on the device body.
What does the "/5A" suffix indicate in P4SMA82A-E3/5A?
The "/5A" suffix in P4SMA82A-E3/5A specifies the packaging configuration: 13-inch diameter plastic tape and reel containing 7500 units. This contrasts with "/61", which denotes 7-inch reels of 1800 units. The "E3" portion confirms RoHS-compliant, commercial-grade construction with matte tin plating. The "/5A" format is optimized for high-volume SMT production lines requiring extended reel life and reduced changeover frequency. All electrical and thermal specifications of the P4SMA82A-E3/5A remain identical regardless of reel size - only logistics and handling differ.
How does the thermal resistance of the P4SMA82A-E3/5A affect PCB layout?
The P4SMA82A-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This means each watt of sustained power dissipation raises the junction temperature by 120 °C above ambient - limiting continuous power handling to ~27 mW at 25 °C ambient to stay within the 150 °C TJ max. For transient-only applications, layout can follow standard SMA footprints, but for repetitive surges, increasing copper area or adding thermal vias is essential. The P4SMA82A-E3/5A's RθJL of 30 °C/W enables effective heat transfer to leads if connected to internal ground/power planes.
Can the P4SMA82A-E3/5A replace a P4SMA82CA in a bidirectional design?
No - the P4SMA82A-E3/5A is unidirectional (anode-cathode polarity), whereas P4SMA82CA is bidirectional (symmetrical breakdown). Substituting P4SMA82A-E3/5A in a bidirectional circuit would result in forward conduction during negative transients, causing failure. Bidirectional protection requires matched avalanche characteristics in both directions, which unidirectional devices lack. If bidirectional behavior is needed, use P4SMA82CA-E3/5A or equivalent. The P4SMA82A-E3/5A's cathode band must align with the higher-potential node; reversing it creates a short circuit under normal bias. Always verify polarity during schematic capture and layout for P4SMA82A-E3/5A.
P4SMA82A-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):
- 70.1V
- Voltage - Breakdown (Min):
- 77.9V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 3.5A
- 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)
P4SMA82A-E3/5A FAQ
1.How can I place an order for P4SMA82A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA82A-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 P4SMA82A-E3/5A reliable?
The price and inventory of P4SMA82A-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 P4SMA82A-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA82A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA82A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA82A-E3/5A?
P4SMA82A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA82A-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 P4SMA82A-E3/5A?
For technical support, including P4SMA82A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA82A-E3/5A requirements.
6.How does Aetrix verify that P4SMA82A-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA82A-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 P4SMA82A-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA82A-E3/5A?
All P4SMA82A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA82A-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 P4SMA82A-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA82A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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