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Vishay General Semiconductor - Diodes Division P4SMA36AHM3_A/H
- Part No.:
- P4SMA36AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA36AHM3_A/H.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA36AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 36 V standoff voltage (VWM), 49.9 V clamping voltage (VC) at 8.0 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 µs waveform. It provides robust ESD and surge protection for power rails and signal lines in automotive and industrial control modules.
For engineers reviewing the P4SMA36AHM3_A/H datasheet, P4SMA36AHM3_A/H pinout, P4SMA36AHM3_A/H application, or P4SMA36AHM3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant construction (HM3 suffix), low thermal resistance (RθJL = 30 °C/W), and verified clamping performance under repetitive transients.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging an avalanche breakdown mechanism to divert transient energy away from sensitive downstream circuitry. Its glass-passivated junction ensures stable reverse leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), critical for protecting MOSFET gates and microcontroller I/O pins.
The device is rated for continuous operation up to TJ = 150 °C and features MSL Level 1 moisture sensitivity per J-STD-020, supporting lead-free reflow up to 260 °C peak. Its 3.3 W steady-state power dissipation (PD) and 40 A non-repetitive forward surge rating (IFSM) support high-reliability placement in DC power input stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30.8 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 3.3 V/5 V/12 V rail protection. |
| VBR (Breakdown Voltage) | 34.2–37.8 V at 1.0 mA - Tight 10% tolerance ensures predictable turn-on during overvoltage events without premature conduction. |
| VC (Clamping Voltage) | 49.9 V at 8.0 A IPPM - Limits transient voltage seen by protected ICs; enables compatibility with 48 V system interfaces. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - Sustains high-energy surges per ISO 7637-2 Pulse 1/2a/5a; derated to 300 W above 91 V. |
| ID (Reverse Leakage) | <1.0 µA at VWM - Minimizes standby power loss and avoids false triggering in low-current sensor circuits. |
| TJ max. | 150 °C - Supports operation in under-hood automotive environments and enclosed industrial enclosures. |
| RθJL | 30 °C/W - Enables effective heat transfer to PCB copper pads; supports reliable operation without external heatsinking. |
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 marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or lower-potential node; completes clamping loop during positive transients. |
| Cathode | Protected line connection / transient sink | Connected to line being protected (e.g., 12 V supply); conducts avalanche current when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance requirements for Tier-1 automotive suppliers and EU industrial equipment. |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and leakage current across 15-year service life. |
| MSL Level 1 | Allows unlimited floor life and single-reflow processing at 260 °C peak without baking. |
| 400 W peak pulse power | Withstands multiple ISO 16750-2 load-dump surges (up to 35 V, 100 ms) without degradation. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects 12 V power rail against load dump and alternator ripple in BCM microcontroller power supply. IC Role / Device Role / Timing Role: Unidirectional TVS clamps positive transients on VCC line upstream of LDO regulator. Use Value: Prevents latch-up or permanent damage to MCU during battery disconnect/reconnect events per ISO 7637-2 Pulse 5a. |
Use Scenario: Shields 24 V digital input optocoupler interface from field-wiring induced surges in factory automation. IC Role / Device Role / Timing Role: Standoff-rated clamping device placed between terminal block and input conditioning circuit. Use Value: Maintains <1 µA leakage to avoid false triggering while clamping 400 W transients within 1 ns. |
| Automotive Infotainment USB Power Rail | Smart Sensor Node Battery Protection |
Use Scenario: Guards +5 V USB VBUS line against ESD and hot-swap transients in head unit power distribution. IC Role / Device Role / Timing Role: Fast-response TVS placed immediately after USB connector, before polyfuse and DC-DC converter. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) to <50 V, preserving USB PHY integrity without affecting data timing. |
Use Scenario: Safeguards lithium-ion battery management IC from inductive switching noise in portable medical sensors. IC Role / Device Role / Timing Role: Low-leakage unidirectional suppressor on battery feed line to BQ series fuel gauge IC. Use Value: Delivers <1 µA ID at 30.8 V VWM to prevent battery drain while enabling 49.9 V clamping for motor driver back-EMF suppression. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/5A | Same VWM (30.8 V), VC (49.9 V), and package; lower PPPM (400 W vs. SMAJ's 400 W), but not AEC-Q101 qualified. | Commercial-grade only; unsuitable for automotive production where AEC-Q101 is mandated. | Select P4SMA36AHM3_A/H when automotive qualification, halogen-free content, or traceable sourcing is required. |
| 1.5SMC36A | Higher package thermal resistance (RθJA ≈ 150 °C/W vs. 120 °C/W), same electrical specs; DO-214AB (SMB) package, larger footprint. | Requires PCB layout change; less suitable for space-constrained automotive modules. | Choose P4SMA36AHM3_A/H for SMA footprint compatibility, tighter thermal performance, and automotive compliance. |
Compared with SMAJ36A-E3/5A and 1.5SMC36A, the P4SMA36AHM3_A/H uniquely combines AEC-Q101 qualification, halogen-free construction, and SMA package with validated 30 °C/W junction-to-lead thermal resistance-enabling higher reliability in thermally dense automotive ECUs without layout revision.
Availability
P4SMA36AHM3_A/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and smart sensor power protection requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for P4SMA36AHM3_A/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 automotive, industrial, and computing applications.
The P4SMA Series targets high-reliability transient suppression in harsh environments, designed specifically for AEC-Q101-compliant automotive subsystems and industrial control systems demanding stable clamping and long-term parametric stability.
FAQ
What is the clamping voltage of the P4SMA36AHM3_A/H at its rated peak pulse current?
The P4SMA36AHM3_A/H has a maximum clamping voltage (VC) of 49.9 V at 8.0 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The P4SMA36AHM3_A/H maintains this clamping performance across its operational temperature range and after repeated surge exposure, as confirmed in Vishay's qualification testing.
Is the P4SMA36AHM3_A/H suitable for automotive applications?
Yes, the P4SMA36AHM3_A/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction meeting automotive reliability standards. It is explicitly rated for operation from –65 °C to +150 °C junction temperature and validated for temperature cycling, highly accelerated life testing, and ESD immunity-making it appropriate for under-hood and cabin-mounted automotive modules. The P4SMA36AHM3_A/H meets these requirements without derating in standard mounting configurations.
What does the "HM3" suffix mean in P4SMA36AHM3_A/H?
The "HM3" suffix in P4SMA36AHM3_A/H denotes halogen-free, RoHS-compliant construction with whisker-resistant matte tin plating, qualified to JESD 201 Class 2. It also indicates compliance with Vishay's automotive-grade material categorization and supports MSL Level 1 handling. Unlike commercial-grade "E3" variants, the HM3 version is fully qualified for automotive production use and carries full AEC-Q101 certification-critical for P4SMA36AHM3_A/H deployment in Tier-1 supply chains.
How does the P4SMA36AHM3_A/H compare to bidirectional TVS diodes?
The P4SMA36AHM3_A/H is unidirectional and intended for DC line protection where polarity is fixed, such as 12 V or 24 V power rails. Unlike bidirectional types (e.g., P4SMA36CA), it blocks reverse voltage up to its VWM but conducts only in avalanche mode during positive transients. This gives it lower leakage and sharper clamping onset than bidirectional equivalents at the same voltage rating-making the P4SMA36AHM3_A/H preferable for asymmetric DC systems where reverse conduction is undesirable.
What is the thermal resistance from junction to lead (RθJL) for the P4SMA36AHM3_A/H?
The P4SMA36AHM3_A/H has a typical junction-to-lead thermal resistance (RθJL) of 30 °C/W, measured under standard test conditions. This low value enables efficient heat transfer from the silicon die to the PCB copper pads via the SMA package leads, supporting sustained power dissipation without external heatsinking. The RθJL value is integral to calculating safe operating area limits for repetitive surge conditions and is verified per Vishay's thermal characterization methodology for the P4SMA36AHM3_A/H.
P4SMA36AHM3_A/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:
- 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/H FAQ
1.How can I place an order for P4SMA36AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA36AHM3_A/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 P4SMA36AHM3_A/H reliable?
The price and inventory of P4SMA36AHM3_A/H 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/H is usually 5 days.
3.What payment methods are accepted for P4SMA36AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA36AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA36AHM3_A/H?
P4SMA36AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA36AHM3_A/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 P4SMA36AHM3_A/H?
For technical support, including P4SMA36AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA36AHM3_A/H requirements.
6.How does Aetrix verify that P4SMA36AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA36AHM3_A/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 P4SMA36AHM3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA36AHM3_A/H?
All P4SMA36AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA36AHM3_A/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 P4SMA36AHM3_A/H part is unused and in its original packaging.
Return procedure for P4SMA36AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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