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Vishay General Semiconductor - Diodes Division P4SMA8.2CAHM3/I
- Part No.:
- P4SMA8.2CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA8.2CAHM3/I.pdf
- Description:
- TVS DIODE 7.02VWM 12.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,581
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Product details
Overview
P4SMA8.2CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 8.2 V breakdown voltage (VBR min/max = 7.79 V / 8.61 V at 10 mA), 7.02 V stand-off voltage (VWM), 12.1 V maximum clamping voltage (VC) at 33.1 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial systems.
For engineers reviewing the P4SMA8.2CAHM3/I datasheet, P4SMA8.2CAHM3/I pinout, P4SMA8.2CAHM3/I application, or P4SMA8.2CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio (VC/VBR ≈ 1.55), and compatibility with automated SMT placement on standard PCB pads.
Technical Context
This device operates as a voltage-clamped surge protector: when transient voltage exceeds VWM (7.02 V), it avalanches symmetrically in both directions due to its bidirectional construction, limiting downstream voltage to ≤12.1 V at 33.1 A. Its glass-passivated junction ensures stable breakdown and low leakage (<200 µA at VWM).
Thermally, it exhibits RθJA = 120 °C/W and RθJL = 30 °C/W, enabling reliable operation up to TJ = +150 °C. The SMA package supports MSL Level 1 handling and 260 °C reflow peak temperature, meeting J-STD-020 requirements for high-volume assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 7.79 V to 8.61 V at 10 mA - defines precise avalanche initiation threshold for bidirectional clamping |
| Stand-off Voltage VWM | 7.02 V - maximum continuous working voltage before conduction begins |
| Clamping Voltage VC | 12.1 V at 33.1 A (10/1000 µs) - limits protected circuit voltage during surge events |
| Peak Pulse Power PPPM | 400 W - sustains transient energy without failure under standardized surge conditions |
| Maximum Leakage ID | <200 µA at VWM - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| Operating Temperature | –65 °C to +150 °C - supports under-hood automotive and industrial ambient environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking - symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts during positive overvoltage; forms one side of bidirectional clamping path |
| Cathode | Transient current entry (negative half-cycle) | Conducts during negative overvoltage; completes symmetrical clamping behavior |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 400 W peak pulse power (10/1000 µs) | Handles typical ISO 7637-2 pulse 1/2/5a surges in automotive electronics without degradation |
| AEC-Q101 qualified & halogen-free | Meets automotive supply chain requirements for reliability and environmental compliance (P/N HM3 suffix) |
| MSL Level 1, 260 °C peak reflow | Supports lead-free SMT assembly without moisture-related popcorning or delamination |
| Low clamping ratio (VC/VBR ≈ 1.55) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices |
Applications
| Automotive Sensor Signal Protection | Industrial CAN Bus Line Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors exposed to load-dump and inductive switching noise in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential or single-ended sensor outputs to limit transients to safe levels. Use Value: Prevents latch-up or damage to 3.3 V/5 V ADC inputs while maintaining signal fidelity below VWM = 7.02 V. |
Use Scenario: Safeguarding CAN_H/CAN_L lines against ESD and fast transients in factory automation controllers and gateways. IC Role / Device Role / Timing Role: Low-capacitance TVS pair (one per line) suppressing ±8 kV contact ESD per IEC 61000-4-2 without distorting 1 Mbps CAN signaling. Use Value: Clamps surges to ≤12.1 V while adding <1 pF parasitic capacitance - preserving signal edge integrity and bus timing margins. |
| Consumer Power Adapter Input Protection | Telecom DSL Line Surge Suppression |
Use Scenario: Input-stage transient suppression on 12 V DC input rails of smart home hubs and set-top boxes subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS placed after fuse and before DC-DC converter to absorb 400 W surges before upstream components. Use Value: Withstands repetitive 300–400 W pulses per UL 497B and meets Underwriters Laboratory recognition QVGQ2. |
Use Scenario: Front-end protection of ADSL/VDSL line interface ICs against induced surges on twisted-pair telecom lines. IC Role / Device Role / Timing Role: Bidirectional clamp across line pairs to shunt common-mode transients while remaining transparent to 1–30 MHz DSL signals. Use Value: Low leakage (<200 µA) avoids loading high-impedance line drivers; VC = 12.1 V ensures receiver ICs stay within absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0CA | Higher VBR (7.6–8.4 V), same SMA package, 600 W PPPM rating | Better suited for systems requiring higher surge margin but tighter VWM tolerance | Select when 600 W pulse handling is required and board layout allows same footprint |
| 1.5SMC8.2CA | Same VBR/VWM, larger SMC (DO-214AB) package, 1500 W PPPM | Used where higher surge energy absorption is needed and PCB space permits larger body | Choose for industrial power supplies needing >400 W surge capacity without changing circuit topology |
Compared with P4SMA8.2CAHM3/I, SMBJ8.0CA offers higher surge power but slightly lower VWM; 1.5SMC8.2CA delivers triple the pulse power in a larger package - making P4SMA8.2CAHM3/I optimal for space-constrained AEC-Q101-compliant designs requiring balanced performance and manufacturability.
Availability
P4SMA8.2CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN nodes, consumer power adapters, and telecom DSL interfaces requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for P4SMA8.2CAHM3/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 optimization.
The P4SMA Series targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and communications equipment - engineered for robust surge handling, automated assembly, and long-term stability under thermal stress.
FAQ
What is the breakdown voltage range of the P4SMA8.2CAHM3/I?
The P4SMA8.2CAHM3/I has a specified breakdown voltage (VBR) range of 7.79 V to 8.61 V at a test current of 10 mA. This range reflects manufacturing tolerance and ensures consistent clamping behavior across production lots. The value is measured under bidirectional conditions and applies equally to both polarities, confirming its suitability for AC or floating signal line protection. P4SMA8.2CAHM3/I maintains this specification across its full operating temperature range.
Is the P4SMA8.2CAHM3/I suitable for automotive applications?
Yes, the P4SMA8.2CAHM3/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction with automotive-grade reliability testing. It meets requirements for temperature cycling, high-temperature reverse bias, and ESD immunity. P4SMA8.2CAHM3/I is explicitly recommended for protecting sensor interfaces, infotainment power rails, and communication buses in passenger vehicles and commercial vehicles.
What does the "CA" suffix mean in P4SMA8.2CAHM3/I?
The "CA" suffix in P4SMA8.2CAHM3/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both forward and reverse directions. Unlike unidirectional variants (e.g., P4SMA8.2A), the CA version has no cathode band marking and functions identically regardless of voltage polarity. This makes P4SMA8.2CAHM3/I ideal for protecting AC-coupled or differential signal paths where polarity is undefined or alternating.
What is the maximum clamping voltage of the P4SMA8.2CAHM3/I under surge conditions?
The P4SMA8.2CAHM3/I has a maximum clamping voltage (VC) of 12.1 V when subjected to a 10/1000 µs surge waveform with a peak pulse current (IPPM) of 33.1 A. This value represents the upper limit of voltage seen by downstream circuitry during worst-case transient events. P4SMA8.2CAHM3/I achieves this clamping performance while maintaining low incremental surge resistance, ensuring predictable and repeatable protection behavior.
Does the P4SMA8.2CAHM3/I require a heatsink for standard operation?
No, the P4SMA8.2CAHM3/I is rated for 3.3 W power dissipation on an infinite heatsink at TA = 50 °C and relies on PCB copper pad thermal conduction rather than external heatsinks. Its RθJA of 120 °C/W assumes mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - a standard layout that suffices for intermittent surge duty cycles. P4SMA8.2CAHM3/I is not intended for continuous power dissipation but for transient suppression only.
P4SMA8.2CAHM3/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):
- 7.02V
- Voltage - Breakdown (Min):
- 7.79V
- Voltage - Clamping (Max) @ Ipp:
- 12.1V
- Current - Peak Pulse (10/1000µs):
- 33.1A
- 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)
P4SMA8.2CAHM3/I FAQ
1.How can I place an order for P4SMA8.2CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA8.2CAHM3/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 P4SMA8.2CAHM3/I reliable?
The price and inventory of P4SMA8.2CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA8.2CAHM3/I is usually 5 days.
3.What payment methods are accepted for P4SMA8.2CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA8.2CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA8.2CAHM3/I?
P4SMA8.2CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA8.2CAHM3/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 P4SMA8.2CAHM3/I?
For technical support, including P4SMA8.2CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA8.2CAHM3/I requirements.
6.How does Aetrix verify that P4SMA8.2CAHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA8.2CAHM3/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 P4SMA8.2CAHM3/I meets industry standards.
7.What is the process for return or replacement of P4SMA8.2CAHM3/I?
All P4SMA8.2CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA8.2CAHM3/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 P4SMA8.2CAHM3/I part is unused and in its original packaging.
Return procedure for P4SMA8.2CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA8.2CAHM3/I Tags
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