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Vishay General Semiconductor - Diodes Division P4SMA36AHM3_A/I
- Part No.:
- P4SMA36AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA36AHM3_A/I.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,798
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Product details
Overview
P4SMA36AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping fast voltage transients on power and signal lines. It features a 36 V standoff voltage (VWM), 49.9 V maximum clamping voltage (VC) at 8.0 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting automotive-grade sensor interfaces and industrial I/O circuits.
For engineers reviewing the P4SMA36AHM3_A/I datasheet, P4SMA36AHM3_A/I pinout, P4SMA36AHM3_A/I application, or P4SMA36AHM3_A/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, junction capacitance behavior, and real-world protection use cases - all confirmed against Vishay Document #88367 (Rev. 09-Jan-2024).
Technical Context
The P4SMA36AHM3_A/I operates as a unidirectional avalanche-clamping device, triggered when reverse voltage exceeds its 34.2–37.8 V breakdown range (VBR at 1 mA). Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and low incremental surge resistance, enabling sub-nanosecond response to ESD and inductive switching events.
Thermally, it exhibits RθJA = 120 °C/W (junction-to-ambient) and RθJL = 30 °C/W (junction-to-lead), with derating above 25 °C per Figure 2. It is halogen-free, RoHS-compliant, and AEC-Q101 qualified (HM3 suffix), supporting automotive under-hood and infotainment system deployments requiring long-term reliability at TJ up to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30.8 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR (Breakdown Voltage) | 34.2–37.8 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 49.9 V at 8.0 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 400 W - Sustains single 10/1000 µs surges without failure; derates to 300 W above 91 V per spec. |
| IPPM (Peak Pulse Current) | 8.0 A - Maximum non-repetitive surge current handled at rated clamping voltage; validated per Fig. 3 waveform. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in high-ambient environments like engine control units. |
| Leakage (ID) | <1.0 µA at VWM - Minimal standby power loss and signal integrity impact in always-on sensor lines. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band; polarity critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge (IFSM = 40 A). |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 36 V supply rail); initiates avalanche clamping when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant | Meets global environmental compliance requirements (HM3 suffix); supports green manufacturing and end-of-life recycling. |
| MSL Level 1 (260 °C peak) | Compatible with standard reflow profiles; no moisture sensitivity handling required prior to assembly. |
| 400 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) on 12 V/24 V systems without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage overshoot during clamping; preserves margin for 3.3 V/5 V logic-level receivers downstream. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor supply line and ground to clamp transients before they reach precision ADCs or microcontroller GPIOs. Use Value: Limits clamped voltage to ≤49.9 V during 8 A surges, preventing latch-up or gate oxide damage in 36 V-rated automotive microcontrollers. |
Use Scenario: Safeguarding 24 V DC input channels of programmable logic controllers against inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted directly at connector entry point to absorb repetitive 10/1000 µs surges without thermal runaway. Use Value: Maintains <1 µA leakage at 30.8 V, avoiding false triggering in high-impedance voltage-sense circuits while surviving 400 W pulses. |
| Telecom Power Rail Protection | Consumer Device USB Port Clamping |
Use Scenario: Guarding 36 V bias rails in optical transceiver modules and PoE-powered network switches against lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on DC-DC converter output, coordinated with upstream fuses and secondary filtering. Use Value: Achieves 120 °C/W thermal resistance with minimal PCB copper, enabling compact layout in space-constrained telecom modules. |
Use Scenario: Secondary-level transient suppression on 5 V USB VBUS lines in smart home hubs and portable media devices exposed to ESD and hot-plug events. IC Role / Device Role / Timing Role: Fast-response TVS placed after USB connector but before USB controller IC to limit ESD-induced voltage spikes. Use Value: Sub-nanosecond response time and 49.9 V clamping ensure USB PHY ICs remain within absolute maximum ratings during ±8 kV contact discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/5A | Same VWM (30.8 V), identical SMA package, but rated for 400 W with 10/1000 µs waveform and not AEC-Q101 qualified. | Lacks automotive qualification; suitable for commercial/industrial use only where AEC-Q101 is not mandated. | Select SMAJ36A-E3/5A for cost-sensitive non-automotive designs requiring same clamping performance without qualification overhead. |
| 1.5SMC36A | Higher package thermal resistance (RθJA ≈ 150 °C/W), larger SMC (DO-214AB) footprint, and 1.5 kW peak power rating - over-specified for most 400 W needs. | Requires larger PCB area and offers excessive surge capacity; less optimal for space-constrained automotive modules. | Choose 1.5SMC36A only if legacy board design uses SMC pads or if multi-kW surge immunity is explicitly required beyond IEC 61000-4-5 Level 4. |
Compared with SMAJ36A-E3/5A, P4SMA36AHM3_A/I adds AEC-Q101 qualification and halogen-free construction without sacrificing clamping performance or package size; versus 1.5SMC36A, it delivers equivalent protection in 30% smaller footprint and superior thermal efficiency for automotive and dense industrial layouts.
Availability
P4SMA36AHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom power rails, and consumer USB port protection requiring stable component supply across production lifecycles.
Supply support for P4SMA36AHM3_A/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, low leakage, and precise clamping are mandatory.
FAQ
What is the clamping voltage of the P4SMA36AHM3_A/I under a 10/1000 µs surge?
The P4SMA36AHM3_A/I has a maximum clamping voltage (VC) of 49.9 V at 8.0 A peak pulse current with a 10/1000 µs waveform, as specified in Vishay Document #88367. This value represents the upper limit of voltage imposed on the protected circuit during standardized surge testing and is critical for ensuring downstream ICs remain within their absolute maximum ratings. The P4SMA36AHM3_A/I achieves this clamping with low incremental resistance, minimizing energy dissipation in the device itself.
Is the P4SMA36AHM3_A/I qualified for automotive applications?
Yes, the P4SMA36AHM3_A/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's P4SMA Series datasheet (Rev. 09-Jan-2024). This qualification validates its reliability under automotive temperature cycling, humidity, mechanical shock, and lifetime surge stress conditions. The P4SMA36AHM3_A/I is specifically intended for use in engine control units, body electronics, and ADAS sensor modules where such certification is mandatory.
What does the "HM3" suffix indicate in P4SMA36AHM3_A/I?
The "HM3" suffix in P4SMA36AHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering guide, HM3 parts meet JESD 201 Class 2 whisker resistance and UL 94 V-0 flammability standards. The "_A/I" further specifies revision A and 13-inch tape-and-reel packaging (7500 units per reel), distinguishing it from H-coded (1800-unit) variants. This full suffix confirms both environmental compliance and automotive suitability for the P4SMA36AHM3_A/I.
How does the thermal performance of P4SMA36AHM3_A/I compare to larger-package TVS diodes?
The P4SMA36AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W, significantly lower than comparable SMC-packaged devices like 1.5SMC36A (≈150 °C/W). This improved thermal efficiency allows the P4SMA36AHM3_A/I to sustain repeated 400 W surges with less temperature rise on standard 0.2" × 0.2" copper pads, making it better suited for compact automotive and industrial PCBs where heat spreading is limited. Its RθJL of 30 °C/W also supports effective conduction through leads to internal ground planes.
Can P4SMA36AHM3_A/I be used in bidirectional configurations?
No, the P4SMA36AHM3_A/I is a unidirectional TVS diode, as indicated by its "A" suffix and cathode band marking. Bidirectional variants in the P4SMA family use the "CA" suffix (e.g., P4SMA36CA). Using the P4SMA36AHM3_A/I in reverse-biased AC applications would result in forward conduction and potential failure. For bidirectional protection at 36 V standoff, select P4SMA36CAHE3_A/I or equivalent - the P4SMA36AHM3_A/I must be oriented with cathode toward the protected line.
P4SMA36AHM3_A/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30.8V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 49.9V
- Current - Peak Pulse (10/1000µs):
- 8A
- 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)
P4SMA36AHM3_A/I FAQ
1.How can I place an order for P4SMA36AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA36AHM3_A/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 P4SMA36AHM3_A/I reliable?
The price and inventory of P4SMA36AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA36AHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA36AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA36AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA36AHM3_A/I?
P4SMA36AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA36AHM3_A/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 P4SMA36AHM3_A/I?
For technical support, including P4SMA36AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA36AHM3_A/I requirements.
6.How does Aetrix verify that P4SMA36AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA36AHM3_A/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 P4SMA36AHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA36AHM3_A/I?
All P4SMA36AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA36AHM3_A/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 P4SMA36AHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA36AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA36AHM3_A/I Tags
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