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Vishay General Semiconductor - Diodes Division P4SMA30AHM3/I
- Part No.:
- P4SMA30AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA30AHM3/I.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA30AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 30 V standoff voltage (VWM), 31.5 V maximum breakdown voltage (VBR), and 400 W peak pulse power (10/1000 µs). It clamps transients to 41.4 V at 9.7 A peak pulse current and is halogen-free, RoHS-compliant, and AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the P4SMA30AHM3/I datasheet, P4SMA30AHM3/I pinout, P4SMA30AHM3/I application, or P4SMA30AHM3/I equivalent, this device is selected for robust overvoltage protection on DC power rails and signal lines where fast response (<1 ns), low clamping ratio (1.38×VWM), and high surge reliability under repetitive transient stress are required.
Technical Context
The P4SMA30AHM3/I operates as a unidirectional avalanche diode with cathode-banded polarity, leveraging glass-passivated junction technology for stable breakdown and low incremental surge resistance. Its thermal resistance (RθJA = 120 °C/W) and 150 °C max junction temperature support operation in compact PCB layouts with minimal copper area.
Designed for 10/1000 µs waveform compliance, it delivers 400 W peak pulse power up to 91 V and derates to 300 W above that threshold. The device meets J-STD-020 MSL Level 1 and passes JESD201 Class 2 whisker testing, confirming suitability for automated SMT assembly and automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 25.6 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin. |
| VBR (Breakdown Voltage) | 28.5–31.5 V at 1 mA - Tight 10.5% tolerance ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 41.4 V at 9.7 A IPPM - Limits downstream IC voltage stress during 400 W surge events. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - Withstands automotive load-dump and inductive switching surges without degradation. |
| ID (Reverse Leakage) | 1.0 µA at 25.6 V - Negligible standby power loss and minimal impact on high-impedance sensor bias networks. |
| TJ max | 150 °C - Enables use in under-hood automotive modules and industrial power supplies with elevated ambient temperatures. |
| Package | SMA (DO-214AC) - Standardized 2-pin surface-mount footprint compatible with JEDEC MS-013AC, supports automated placement and reflow. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, 0.208" × 0.157" (5.28 mm × 3.99 mm) outline, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or low-side reference in TVS configuration. | Provides low-impedance path to ground during reverse transient clamping; must be routed with low-inductance trace to minimize overshoot. |
| Cathode | Current exit terminal in forward bias; connected to protected line (e.g., 24 V rail or CAN_H). | Band-marked end; reverse-biased during normal operation; avalanche conduction initiates here during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics per stress test requirements. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets EU Directive 2011/65/EU and IPC-1752A material declarations; suitable for green manufacturing programs. |
| 400 W peak pulse power (10/1000 µs) | Withstands ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surge waveforms without failure. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes overvoltage exposure to downstream MOSFETs, microcontrollers, and analog front-ends. |
| MSL Level 1 moisture sensitivity | Zero bake requirement prior to reflow; supports standard SMT assembly without special handling. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in automotive ECUs against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp transients before LDOs or DC-DC converters. Use Value: Clamps 120 V/200 ms load dump to ≤41.4 V, preserving downstream regulator integrity and meeting ISO 16750-2 requirements. |
Use Scenario: Safeguarding analog output lines of pressure or temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: TVS mounted at connector interface to shunt ESD and cable discharge events before signal conditioning op-amps. Use Value: Sub-1 ns response limits voltage excursion to <45 V during ±8 kV contact ESD (IEC 61000-4-2), preventing ADC saturation or latch-up. |
| Telecom DC Feeder Protection | Consumer Power Adapter Input Stage |
Use Scenario: Shielding 48 V PoE-powered equipment inputs from induced lightning surges on Ethernet cables. IC Role / Device Role / Timing Role: Primary TVS on DC input before isolation transformer or hot-swap controller. Use Value: Absorbs 400 W 10/1000 µs surges (IEC 61000-4-5 Level 3) while maintaining <1 µA leakage at 39 V nominal PoE voltage. |
Use Scenario: Secondary-side overvoltage suppression on 5–20 V USB-C PD adapter outputs. IC Role / Device Role / Timing Role: Unidirectional TVS across output terminals to prevent damage from feedback loop faults or Zener failure. Use Value: 31.5 V VBR ensures no conduction during normal 20 V PD operation; 41.4 V VC prevents downstream USB-PD controller latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30AHE3/A | Same VWM (25.6 V), VBR (28.5–31.5 V), and VC (41.4 V), but rated for 400 W only up to 91 V; not AEC-Q101 qualified. | Limited to commercial/industrial use; lacks automotive qualification and halogen-free certification. | Select when AEC-Q101 and halogen-free compliance are not required, and cost optimization is prioritized. |
| 1.5SMC30A | Same electrical specs but in larger SMC (DO-214AB) package (0.260" × 0.230"); higher RθJA (90 °C/W) and 1.5 kW peak power rating. | Better thermal performance under sustained surge duty cycles; requires larger PCB real estate. | Choose when board space permits and higher thermal margin or legacy SMC footprint compatibility is needed. |
Compared with SMAJ30AHE3/A, P4SMA30AHM3/I adds AEC-Q101 qualification and halogen-free compliance without sacrificing clamping performance; versus 1.5SMC30A, it trades package size and thermal headroom for space-constrained automotive SMT designs.
Availability
P4SMA30AHM3/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power interfaces, and consumer USB-C PD adapters requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for P4SMA30AHM3/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 passive components with emphasis on reliability, efficiency, and application-specific design.
The P4SMA Series targets high-reliability transient suppression in automotive, industrial, and telecom systems, delivering standardized TVS performance in compact surface-mount packages with rigorous qualification and material compliance.
FAQ
What is the maximum clamping voltage of the P4SMA30AHM3/I at its rated peak pulse current?
The P4SMA30AHM3/I has a maximum clamping voltage (VC) of 41.4 V at 9.7 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88367 and defines the upper voltage limit imposed on protected circuitry during surge events. The P4SMA30AHM3/I maintains this clamping performance across its qualified temperature range and after repeated surge exposures when operated within derating guidelines.
Is the P4SMA30AHM3/I suitable for automotive applications, and what qualifications does it hold?
Yes, the P4SMA30AHM3/I is explicitly qualified to AEC-Q101 for automotive use, as confirmed by the "HM3" suffix and documentation in Vishay's P4SMA series datasheet (Rev. 09-Jan-2024, Doc. #88367). It also meets JESD201 Class 2 whisker resistance, J-STD-020 MSL Level 1, and UL 497B recognition. These certifications validate the P4SMA30AHM3/I for under-hood and chassis-mounted modules where reliability under thermal cycling, vibration, and electrical stress is critical.
What is the meaning of the "HM3" suffix in P4SMA30AHM3/I?
The "HM3" suffix in P4SMA30AHM3/I indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering information table, "HM3" denotes both environmental compliance (no brominated flame retardants, antimony trioxide, or other restricted halogens) and automotive-grade reliability testing. The "/I" denotes 7500-piece tape-and-reel packaging on 13-inch reels, enabling high-volume SMT assembly.
How does the P4SMA30AHM3/I compare to bidirectional TVS diodes in terms of circuit implementation?
The P4SMA30AHM3/I is unidirectional and requires correct polarity placement: cathode to the protected line, anode to ground. Unlike bidirectional variants (e.g., P4SMA30CA), it cannot suppress symmetrical AC transients or floating-line surges without additional circuitry. Its advantage lies in lower leakage (<1 µA at VWM) and tighter VBR tolerance-critical for DC power rail protection where reverse conduction must be strictly avoided during normal operation. The P4SMA30AHM3/I is not interchangeable with bidirectional types without schematic revision.
What thermal derating applies to the P4SMA30AHM3/I above 25 °C ambient temperature?
The P4SMA30AHM3/I follows the derating curve in Figure 2 of Vishay document 88367: peak pulse power decreases linearly from 400 W at 25 °C to zero at 150 °C junction temperature. At 85 °C ambient with typical PCB copper pad layout (0.2" × 0.2"), the usable PPPM drops to approximately 260 W. Designers must calculate actual TJ using RθJA = 120 °C/W and ensure transient duty cycle remains below 0.01% to avoid thermal runaway. This derating behavior is intrinsic to the P4SMA30AHM3/I's silicon and package construction.
P4SMA30AHM3/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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 9.7A
- 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)
P4SMA30AHM3/I FAQ
1.How can I place an order for P4SMA30AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA30AHM3/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 P4SMA30AHM3/I reliable?
The price and inventory of P4SMA30AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA30AHM3/I is usually 5 days.
3.What payment methods are accepted for P4SMA30AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA30AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA30AHM3/I?
P4SMA30AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA30AHM3/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 P4SMA30AHM3/I?
For technical support, including P4SMA30AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA30AHM3/I requirements.
6.How does Aetrix verify that P4SMA30AHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA30AHM3/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 P4SMA30AHM3/I meets industry standards.
7.What is the process for return or replacement of P4SMA30AHM3/I?
All P4SMA30AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA30AHM3/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 P4SMA30AHM3/I part is unused and in its original packaging.
Return procedure for P4SMA30AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA30AHM3/I Tags
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