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Vishay General Semiconductor - Diodes Division P4SMA82CAHM3/I
- Part No.:
- P4SMA82CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA82CAHM3/I.pdf
- Description:
- TVS DIODE 70.1VWM 113VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,804
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Product details
Overview
P4SMA82CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for clamping voltage transients on signal and power lines. It features a 82 V breakdown voltage (VBR = 77.9–86.1 V at 1 mA), 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 - suitable for protecting automotive sensor interfaces and industrial I/O circuits against ESD and inductive switching surges.
For engineers reviewing the P4SMA82CAHM3/I datasheet, P4SMA82CAHM3/I pinout, P4SMA82CAHM3/I application, or P4SMA82CAHM3/I equivalent, this device delivers AEC-Q101-qualified transient protection in SMA (DO-214AC) package with halogen-free RoHS compliance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive and industrial PCB designs requiring validated surge immunity.
Technical Context
The P4SMA82CAHM3/I operates as a bidirectional avalanche diode, symmetrically clamping both positive and negative transients without polarity marking. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 µA at 70.1 V), while thermal resistance RθJA = 120 °C/W supports operation up to TJ = 150 °C under defined pad layout conditions.
It meets UL 497B recognition (QVGQ2) and JESD201 Class 2 whisker resistance. The device is rated for 300 W peak pulse power above 91 V per note (1), and derates linearly above TA = 25 °C per Figure 2 - confirming suitability for under-hood automotive environments where ambient temperature exceeds 85 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 77.9 V / 86.1 V at 1 mA - defines precise clamping onset threshold for bidirectional surge events |
| VWM | 70.1 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 113 V at 3.5 A - clamped voltage during 10/1000 µs transient, limiting stress on downstream ICs |
| PPPM | 400 W (≤91 V), 300 W (>91 V) - peak surge energy absorption capability under standard waveform |
| IFSM | Not applicable - bidirectional device has no forward surge rating (unidirectional only) |
| TJ max. | 150 °C - enables use in engine control units and industrial motor drives with elevated ambient temps |
| Package | SMA (DO-214AC) - 5.28 mm × 4.50 mm footprint compatible with automated SMT placement |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional - no polarity marking; symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Connects to protected line; conducts during negative transients |
| Cathode | Transient return path (bidirectional) | Connects to protected line; conducts during positive transients |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-020 MSL Level 1 (260 °C peak reflow) |
| 400 W peak pulse power | Withstands 10/1000 µs surges up to 3.5 A without degradation in standard PCB layout |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on protected ICs compared to higher-ratio TVS devices |
| UL 497B recognized (QVGQ2) | Approved for telecom and industrial signal line protection per safety standard |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus nodes and temperature/pressure sensors in engine compartments exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential signal pair or supply rail to limit transient excursions. Use Value: Maintains signal integrity below 113 V during 3.5 A surges, preventing latch-up or damage to 3.3 V/5 V sensor interface ICs. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers subjected to field wiring induced transients. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing fast-rising common-mode surges before they reach precision op-amps or ADC front-ends. Use Value: Clamps within 1 ns response time to <113 V, preserving measurement accuracy and avoiding input stage saturation. |
| Telecom Line Card Protection | Consumer Appliance Motor Control |
Use Scenario: Shielding Ethernet PHY or DSL line drivers from lightning-induced surges on outdoor-facing ports. IC Role / Device Role / Timing Role: First-stage transient suppressor mounted at connector entry point, shunting energy to chassis ground. Use Value: Handles repetitive 400 W surges per UL 497B requirements while maintaining <1 µA leakage at 70.1 V standby voltage. |
Use Scenario: Guarding microcontroller GPIOs and gate drivers in washing machine motor inverters against back-EMF spikes. IC Role / Device Role / Timing Role: Localized clamp across MOSFET gate-source or MCU reset line to prevent false triggering. Use Value: Withstands 8.3 ms half-sine surges up to 40 A (unidirectional reference) and provides robust 150 °C junction operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85CA | Higher VBR (80.8–89.2 V), same SMA package, 600 W PPPM | Better suited for systems requiring higher standoff but same clamping margin | Select when design needs ≥85 V VWM and higher surge margin without changing layout |
| 1.5KE82CA | Through-hole DO-201 package, 1500 W PPPM, larger footprint | Used in legacy industrial power supplies where board space allows through-hole mounting | Choose only if retrofitting existing through-hole designs; not drop-in for SMT production |
Compared with SMBJ85CA and 1.5KE82CA, the P4SMA82CAHM3/I offers optimized balance of AEC-Q101 qualification, halogen-free compliance, and compact SMA footprint - making it preferred for new automotive and high-density industrial PCBs where reliability, regulatory alignment, and assembly automation are mandatory.
Availability
P4SMA82CAHM3/I is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA82CAHM3/I 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, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The P4SMA Series targets high-volume, high-reliability transient suppression in automotive, industrial, and telecom applications - engineered for AEC-Q101 compliance, low clamping voltage, and robust surge handling in compact surface-mount packages.
FAQ
What is the breakdown voltage range for P4SMA82CAHM3/I?
The P4SMA82CAHM3/I has a specified breakdown voltage (VBR) range of 77.9 V to 86.1 V at 1 mA test current, per Vishay Document 88367. This ±5% tolerance ensures consistent clamping behavior across production lots and supports reliable overvoltage protection in 70–85 V system rails. The value is measured bidirectionally due to the CA suffix.
Is P4SMA82CAHM3/I suitable for automotive applications?
Yes, P4SMA82CAHM3/I is AEC-Q101 qualified (as indicated by the HM3 suffix) and rated for operation from −65 °C to +150 °C junction temperature. It meets JESD201 Class 2 whisker resistance and UL 497B recognition - making it appropriate for engine control modules, body electronics, and ADAS sensor interfaces where transient immunity and long-term reliability are required.
What does the "HM3" suffix mean in P4SMA82CAHM3/I?
The "HM3" suffix in P4SMA82CAHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The "H" indicates halogen-free molding compound, "M3" confirms RoHS compliance and JESD201 Class 2 whisker resistance, and the "I" specifies 7500-piece tape-and-reel packaging on 13-inch reels - all verified in Vishay's official ordering information table.
What is the maximum clamping voltage of P4SMA82CAHM3/I under surge conditions?
The P4SMA82CAHM3/I exhibits a maximum clamping voltage (VC) of 113 V at 3.5 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is guaranteed per the Electrical Characteristics table in Document 88367 and defines the upper voltage limit imposed on protected circuitry during standardized surge events.
Does P4SMA82CAHM3/I have polarity markings on the package?
No, P4SMA82CAHM3/I is a bidirectional TVS diode and carries no polarity marking on the SMA (DO-214AC) package. Unlike unidirectional variants (e.g., P4SMA82A), the CA version functions identically in both directions - eliminating orientation concerns during automated placement and simplifying PCB layout for differential or AC-coupled signal lines.
P4SMA82CAHM3/I 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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA82CAHM3/I FAQ
1.How can I place an order for P4SMA82CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA82CAHM3/I 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 P4SMA82CAHM3/I reliable?
The price and inventory of P4SMA82CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA82CAHM3/I is usually 5 days.
3.What payment methods are accepted for P4SMA82CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA82CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA82CAHM3/I?
P4SMA82CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA82CAHM3/I 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 P4SMA82CAHM3/I?
For technical support, including P4SMA82CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA82CAHM3/I requirements.
6.How does Aetrix verify that P4SMA82CAHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA82CAHM3/I 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 P4SMA82CAHM3/I meets industry standards.
7.What is the process for return or replacement of P4SMA82CAHM3/I?
All P4SMA82CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA82CAHM3/I, 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 P4SMA82CAHM3/I part is unused and in its original packaging.
Return procedure for P4SMA82CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA82CAHM3/I Tags
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