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Vishay General Semiconductor - Diodes Division P4SMA24AHM3/H
- Part No.:
- P4SMA24AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA24AHM3/H.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,415
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Product details
Overview
P4SMA24AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 24 V standoff voltage (VWM), 25.2 V maximum breakdown voltage (VBR), 33.2 V clamping voltage at 12 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the P4SMA24AHM3/H datasheet, P4SMA24AHM3/H pinout, P4SMA24AHM3/H application, or P4SMA24AHM3/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), junction temperature range (–65 to +150 °C), and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker test.
Technical Context
The P4SMA24AHM3/H operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (22.8–25.2 V at 1 mA). Its glass-passivated junction ensures stable leakage performance (<1.0 µA at 20.5 V) and fast response time (<1.0 ps), enabling protection against ESD, lightning-induced surges, and inductive switching transients.
Rated for 400 W peak pulse power (derated to 300 W above 91 V), it delivers 12 A peak pulse current under 10/1000 µs waveform when mounted on 5.0 mm × 5.0 mm copper pads. Its 30 °C/W junction-to-lead thermal resistance supports reliable operation up to 150 °C junction temperature, with MSL Level 1 moisture sensitivity and 260 °C reflow peak compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20.5 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR (Breakdown Voltage) | 22.8–25.2 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transient events. |
| VC (Clamping Voltage) | 33.2 V at 12 A IPPM - Peak voltage seen by protected circuit during 10/1000 µs surge; critical for downstream IC survival. |
| PPPM (Peak Pulse Power) | 400 W - Sustains single 10/1000 µs surge without failure; derates linearly above 25 °C ambient. |
| ID (Reverse Leakage) | <1.0 µA at VWM - Minimal standby power loss and signal integrity impact in high-impedance circuits. |
| TJ max. | +150 °C - Enables use in under-hood automotive environments and enclosed industrial enclosures. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to lower-potential side (e.g., GND or return path); defines directionality of clamping action. |
| Cathode | Clamping output / Surge current sink | Connected to protected line (e.g., 24 V rail); conducts surge current to anode during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Supports robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24 V systems without derating. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body electronics where long-term reliability under thermal stress is mandatory. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JESD201 Class 2 whisker resistance - suitable for green manufacturing and export compliance. |
| MSL Level 1, 260 °C reflow compatible | Enables standard SMT assembly without pre-baking; eliminates moisture-related popcorning risk during reflow. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving system immunity. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus power rails and microcontroller I/O pins from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between 24 V supply and ground, triggered within picoseconds of overvoltage. Use Value: Limits transient voltage to ≤33.2 V, preventing latch-up or gate oxide damage in 3.3 V/5 V logic and CAN transceivers. |
Use Scenario: Shielding 24 V digital input channels of programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Primary front-end surge suppressor on dry-contact or optocoupler input stages. Use Value: Absorbs 400 W pulses without degradation, maintaining signal integrity across 10⁵+ switching cycles in factory automation. |
| Telecom Power Supply Output Stage | Consumer Appliance Motor Driver Protection |
Use Scenario: Safeguarding secondary-side 24 V outputs of AC/DC adapters powering base station control boards. IC Role / Device Role / Timing Role: Final-stage overvoltage clamp after DC-DC regulation, before connector interface. Use Value: Withstands repetitive 10/1000 µs surges per IEC 61000-4-5, ensuring uptime in outdoor telecom cabinets. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in smart home appliances (e.g., washing machine control boards). IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals or H-bridge power FETs. Use Value: Clamps inductive kick to 33.2 V, preventing MOSFET avalanche failure and reducing need for snubber networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Same SMA package, 24 V VWM, but rated for 400 W with 1.5 kW peak surge capability; higher IPPM (22.5 A) and VC (38.9 V). | Higher clamping voltage reduces margin for 3.3 V logic; better suited for 24 V-only analog/sensor lines. | Select SMAJ24A when higher single-pulse energy handling is required and clamping voltage margin allows. |
| 1.5SMC24A | DO-214AB (SMC) package, same 24 V VWM, 400 W rating, but larger footprint (7.11 × 6.22 mm vs. SMA's 4.93 × 3.99 mm) and higher RθJA (70 °C/W). | Lower thermal resistance enables higher average power dissipation; unsuitable for space-constrained layouts. | Choose 1.5SMC24A for high-reliability industrial designs where board area permits and thermal management prioritizes. |
Compared with SMAJ24A and 1.5SMC24A, the P4SMA24AHM3/H offers optimal balance of compact SMA footprint, AEC-Q101 qualification, halogen-free compliance, and precise 33.2 V clamping - making it preferred for automotive and space-limited industrial PCBs requiring certified reliability.
Availability
P4SMA24AHM3/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC inputs, telecom power supplies, and consumer appliance motor drivers requiring stable component supply with full traceability and lifecycle continuity.
Supply support for P4SMA24AHM3/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 developed for high-volume, surface-mount transient suppression in automotive, industrial, and telecom systems - emphasizing AEC-Q101 qualification, low-profile packaging, and consistent clamping performance across temperature.
FAQ
What is the clamping voltage of the P4SMA24AHM3/H at its rated peak pulse current?
The P4SMA24AHM3/H has a maximum clamping voltage (VC) of 33.2 V at 12 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured with the device mounted on 5.0 mm × 5.0 mm copper pads and represents the upper limit of voltage imposed on the protected circuit during surge events - critical for ensuring downstream 3.3 V or 5 V ICs remain within absolute maximum ratings.
Is the P4SMA24AHM3/H qualified for automotive applications?
Yes, the P4SMA24AHM3/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's P4SMA Series datasheet (Document Number 88367, Revision 09-Jan-2024). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD, validating its suitability for automotive body electronics, infotainment power rails, and sensor interface protection.
What does the "HM3" suffix indicate in P4SMA24AHM3/H?
The "HM3" suffix in P4SMA24AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from commercial-grade M3 (halogen-free, non-automotive) and E3 (RoHS-compliant, non-automotive) variants. The "H" indicates 7-inch tape-and-reel packaging (1800 units/reel), and "/H" confirms the revision code per Vishay's ordering nomenclature.
Can the P4SMA24AHM3/H be used in bidirectional configurations?
No, the P4SMA24AHM3/H is a unidirectional TVS diode, as indicated by its "A" suffix and absence of "CA" in the part number. Bidirectional operation requires the CA variant (e.g., P4SMA24CA). Using P4SMA24AHM3/H in bidirectional circuits would result in forward conduction during negative transients, potentially damaging the device or failing to protect the line.
What is the thermal resistance and maximum junction temperature of the P4SMA24AHM3/H?
The P4SMA24AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and a maximum junction temperature (TJ max.) of +150 °C. These values assume mounting on minimum recommended pad layout (0.2" × 0.2" copper pads); actual thermal performance improves with larger copper areas or internal layer heatsinking - essential for sustained surge duty cycles in enclosed industrial enclosures.
P4SMA24AHM3/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):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 12A
- 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)
P4SMA24AHM3/H FAQ
1.How can I place an order for P4SMA24AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA24AHM3/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 P4SMA24AHM3/H reliable?
The price and inventory of P4SMA24AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA24AHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA24AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA24AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA24AHM3/H?
P4SMA24AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA24AHM3/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 P4SMA24AHM3/H?
For technical support, including P4SMA24AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA24AHM3/H requirements.
6.How does Aetrix verify that P4SMA24AHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA24AHM3/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 P4SMA24AHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA24AHM3/H?
All P4SMA24AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA24AHM3/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 P4SMA24AHM3/H part is unused and in its original packaging.
Return procedure for P4SMA24AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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