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Vishay General Semiconductor - Diodes Division P4SMA82AHM3/H
- Part No.:
- P4SMA82AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA82AHM3/H.pdf
- Description:
- TVS DIODE 70.1VWM 113VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,338
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Product details
Overview
P4SMA82AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 82 V breakdown voltage (VBR = 77.9–86.1 V at IT = 1.0 mA), 70.1 V standoff voltage (VWM), and 113 V clamping voltage (VC) at 3.5 A peak pulse current (IPPM). It delivers 400 W peak pulse power (10/1000 µs waveform) and is AEC-Q101 qualified for automotive applications including sensor line protection and ECU power rail surge suppression.
For engineers reviewing the P4SMA82AHM3/H datasheet, P4SMA82AHM3/H pinout, P4SMA82AHM3/H application, or P4SMA82AHM3/H equivalent, this device is selected for high-reliability transient suppression where low clamping ratio (VC/VBR ≈ 1.42), halogen-free RoHS compliance, MSL Level 1 moisture sensitivity, and automotive-grade qualification are required.
Technical Context
The P4SMA82AHM3/H operates as a unidirectional avalanche-clamping TVS diode with glass-passivated junction, enabling sub-nanosecond response to transients induced by inductive switching or ESD. Its thermal resistance (RθJA = 120 °C/W) and junction temperature limit (TJ = 150 °C) support operation on standard 0.2" × 0.2" copper pads without heatsinking.
It features low incremental surge resistance and excellent clamping capability, with a maximum reverse leakage of 1.0 µA at VWM and a temperature coefficient of VBR at +0.105 %/°C - critical for stable performance across automotive ambient ranges (−65 °C to +150 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 77.9 V / 86.1 V at 1.0 mA test current - defines precise avalanche onset window for predictable clamping behavior |
| VWM | 70.1 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 113 V at 3.5 A - clamped voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 400 W - peak transient energy absorption capacity under standardized surge waveform |
| IFSM | 40 A - single half-sine surge current rating (8.3 ms), supporting inrush and load-dump immunity |
| TJ max | +150 °C - enables use in under-hood automotive environments without derating penalties |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 0.208" length, compatible with automated placement |
Pinout & Package
Package: SMA (DO-214AC), molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102; cathode indicated by band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected circuit ground or low-side reference | Provides low-forward-voltage path during surge conduction; must be routed with minimal inductance to avoid voltage overshoot |
| Cathode | Current exit terminal in reverse-biased clamping mode; connected to protected line (e.g., CAN_H, LIN, sensor supply) | Defines polarity-sensitive connection point - incorrect orientation disables transient suppression |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics per stress test requirements - supports PPAP and long-term reliability in vehicle ECUs |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental regulations and eliminates corrosive halogen emissions during reflow or failure |
| MSL Level 1 (260 °C peak) | Enables standard lead-free reflow without prebake - reduces manufacturing complexity and cost |
| 400 W peak pulse power (10/1000 µs) | Withstands ISO 7637-2 Pulse 1/2a/5a surges and IEC 61000-4-5 Line-to-Line surges up to 1 kV |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage exposure to downstream MOSFETs, MCUs, and analog front-ends during clamping |
Applications
| Automotive Sensor Protection | Industrial Power Rail Clamping |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine control modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and ground to clamp negative transients and suppress positive spikes above VWM. Use Value: Prevents sensor IC latch-up or damage from ±100 V transients while maintaining <1 µA leakage at 70.1 V operating voltage. |
Use Scenario: Safeguarding 24 V DC input rails of PLC I/O modules against switching surges from relay coils and motor drives. IC Role / Device Role / Timing Role: Standoff-connected TVS across rail-to-ground, conducting only during >70.1 V events with <1 ns response. Use Value: Limits rail voltage to ≤113 V during 400 W surges, preserving upstream DC-DC converter and downstream logic ICs. |
| Telecom Interface Surge Suppression | Consumer Device ESD Protection |
|
Use Scenario: Shielding RS-485 transceiver data lines in base station remote units subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; this unidirectional part used on VCC-to-ground path of transceiver supply. Use Value: Absorbs repetitive 10/1000 µs surges up to 300 W (derated above 91 V) without degradation, ensuring 15+ year field life. |
Use Scenario: Guarding USB VBUS and HDMI hot-plug detection lines in smart TVs against human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF at 0 V) placed inline to shunt ESD current before reaching port controller. Use Value: Clamps 8 kV contact discharge to <113 V within nanoseconds, preventing interface IC reset or permanent gate oxide damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ82A | Same VBR range (77.9–86.1 V), but rated for 400 W only up to 82 V; no AEC-Q101 qualification; MSL Level 1 confirmed | Commercial-grade industrial use only; not approved for automotive production | Select when AEC-Q101 is not required and cost is prioritized over automotive traceability |
| 1.5SMC82A | Higher package thermal mass (SMC/DO-214AB); same VBR, VC, and PPPM; AEC-Q101 available only in HE3/HM3 variants (not standard SMC) | Requires larger PCB footprint (7.11 mm × 6.22 mm vs. SMA's 4.93 mm × 3.99 mm); better thermal dissipation for sustained surges | Choose when board space allows and higher IPPM margin (>5 A) or extended thermal endurance is needed |
Compared with SMAJ82A and 1.5SMC82A, the P4SMA82AHM3/H uniquely combines AEC-Q101 qualification, halogen-free construction, and compact SMA footprint - making it the only option among the three qualified for automotive Tier-1 production with zero material compliance trade-offs.
Availability
P4SMA82AHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial power rail clamping, telecom interface surge suppression, and consumer device ESD protection requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for P4SMA82AHM3/H 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 was designed specifically for surface-mount transient suppression in automotive, industrial, and telecom systems where compact size, high surge robustness, and qualification-grade consistency are mandatory.
FAQ
What is the maximum clamping voltage of the P4SMA82AHM3/H under a 10/1000 µs surge?
The P4SMA82AHM3/H has a maximum clamping voltage (VC) of 113 V at 3.5 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet (Document Number: 88367) and reflects worst-case clamping performance at TA = 25 °C on recommended 0.2" × 0.2" copper pads. The P4SMA82AHM3/H maintains this clamping level across its full operating temperature range.
Is the P4SMA82AHM3/H suitable for automotive applications?
Yes, the P4SMA82AHM3/H is AEC-Q101 qualified and explicitly designated for automotive use via the HM3 suffix (halogen-free, RoHS-compliant, and AEC-Q101 qualified). It meets stress test requirements for temperature cycling, humidity, mechanical shock, and surge endurance - validated for deployment in engine control units, body control modules, and ADAS sensor interfaces. The P4SMA82AHM3/H carries full PPAP documentation support through Vishay.
What does the "HM3" suffix indicate in P4SMA82AHM3/H?
The "HM3" suffix in P4SMA82AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. "H" specifies the packaging format (7" tape-and-reel, 1800 pcs/reel), "M3" confirms halogen-free molding compound and compliance with JESD201 Class 2 whisker resistance. The trailing "/H" is a revision identifier per Vishay's ordering convention. The P4SMA82AHM3/H is not interchangeable with non-HM3 variants due to material and qualification differences.
How does the P4SMA82AHM3/H compare to bidirectional TVS diodes like P4SMA82CA?
The P4SMA82AHM3/H is unidirectional and intended for DC rail or signal-line protection where polarity is fixed (e.g., VCC-to-ground). In contrast, P4SMA82CA is bidirectional and suited for AC-coupled or differential lines (e.g., RS-485, CAN). The P4SMA82AHM3/H offers lower leakage (<1 µA at 70.1 V) and tighter VBR tolerance than its bidirectional counterpart, but cannot suppress negative-going transients on positive rails without external biasing.
What is the thermal resistance and maximum junction temperature of the P4SMA82AHM3/H?
The P4SMA82AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads, and a maximum junction temperature (TJ) of +150 °C. Its junction-to-lead resistance (RθJL) is 30 °C/W. These values enable reliable operation in under-hood automotive environments and industrial enclosures without forced airflow, provided PCB layout adheres to Vishay's pad recommendations. The P4SMA82AHM3/H derates linearly above 25 °C ambient per Figure 2 in the datasheet.
P4SMA82AHM3/H 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:
- 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:
- 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)
P4SMA82AHM3/H FAQ
1.How can I place an order for P4SMA82AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA82AHM3/H 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 P4SMA82AHM3/H reliable?
The price and inventory of P4SMA82AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA82AHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA82AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA82AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA82AHM3/H?
P4SMA82AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA82AHM3/H 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 P4SMA82AHM3/H?
For technical support, including P4SMA82AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA82AHM3/H requirements.
6.How does Aetrix verify that P4SMA82AHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA82AHM3/H 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 P4SMA82AHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA82AHM3/H?
All P4SMA82AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA82AHM3/H, 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 P4SMA82AHM3/H part is unused and in its original packaging.
Return procedure for P4SMA82AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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