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Vishay General Semiconductor - Diodes Division P4SMA250AHM3_A/I
- Part No.:
- P4SMA250AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA250AHM3_A/I.pdf
- Description:
- TVS DIODE 214VWM 344VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,503
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Product details
Overview
P4SMA250AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 250 V standoff voltage (VWM), 263 V minimum breakdown voltage (VBR), and 400 W peak pulse power (10/1000 µs). It delivers 0.87 A peak pulse current (IPPM) and clamps transients to 344 V at that current, serving as primary overvoltage protection for DC power rails and signal lines in industrial and automotive electronics.
For engineers reviewing the P4SMA250AHM3_A/I datasheet, P4SMA250AHM3_A/I pinout, P4SMA250AHM3_A/I application, or P4SMA250AHM3_A/I equivalent, this page provides verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, clamping behavior, and direct alternative options for robust circuit protection design.
Technical Context
The P4SMA250AHM3_A/I operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to transient events and low incremental surge resistance. Its 250 V stand-off voltage supports use on 200–240 VDC systems, while its 344 V clamping voltage at 0.87 A ensures safe margin below typical 350–400 V system insulation limits.
Rated for 150 °C maximum junction temperature and qualified to AEC-Q101, it sustains repetitive surge duty cycles up to 0.01 % under 10/1000 µs waveform conditions. Thermal resistance of 120 °C/W (junction-to-ambient, on recommended 5.0 mm × 5.0 mm copper pads) defines derating above 25 °C ambient per Figure 2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 250 V - Maximum continuous reverse working voltage before conduction begins; sets operating margin for 200–240 VDC bus protection. |
| VBR (Breakdown Voltage) | 237–263 V at 1 mA - Confirmed avalanche initiation range; ensures reliable triggering within ±5 % tolerance at test current. |
| VC (Clamping Voltage) | 344 V at IPPM = 0.87 A - Measured peak voltage during 10/1000 µs transient; defines worst-case stress on downstream components. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability under standard 10/1000 µs waveform; derates to 300 W above 91 V per spec. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on 0.2" × 0.2" copper pads; determines required board copper area for thermal management. |
| TJ max | 150 °C - Maximum allowable junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suffix HM3 denotes halogen-free RoHS + AEC-Q101. |
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 current entry / Reverse voltage reference | Connected to system ground or lower-potential node; defines directionality of clamping action. |
| Cathode | Transient current sink / Clamping output | Connected to protected line (e.g., 240 VDC rail); conducts surge current to ground during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 3 (1 kV/2 kA) surges when combined with appropriate series impedance. |
| Glass passivated chip junction | Ensures stable leakage performance and long-term reliability under humidity and thermal cycling stress. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units, body electronics, and ADAS power supplies. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving clamping precision. |
Applications
| Industrial Motor Drives | Automotive Power Supplies |
|---|---|
Use Scenario: Protection of 240 VDC intermediate bus in variable-frequency drives against switching transients and load dump. IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC bus to clamp inductive kickback and regenerative spikes. Use Value: Limits voltage excursions to ≤344 V, preventing damage to IGBT gate drivers and DC-link capacitors rated at 400 V. |
Use Scenario: Overvoltage suppression on 24 V auxiliary supply rail in engine control modules exposed to load dump per ISO 16750-2. IC Role / Device Role / Timing Role: Primary clamping device parallel to input filter capacitor, triggered within nanoseconds of transient onset. Use Value: Withstands 35 V/100 ms load dump events by diverting surge current away from LDO regulators and microcontrollers. |
| Telecom Power Rectifiers | Renewable Energy Inverters |
Use Scenario: Secondary-side surge protection on -48 V DC telecom rectifier outputs subject to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted at rectifier output connector to absorb coupled common-mode transients. Use Value: Maintains 250 V stand-off while clamping to 344 V, preserving compatibility with -48 V system logic and monitoring ICs. |
Use Scenario: DC link protection in solar string inverters where PV array open-circuit voltage reaches 600–1000 VDC. IC Role / Device Role / Timing Role: Cascaded TVS stage (with higher-voltage devices) providing fine-grained clamping near sensitive gate drivers. Use Value: Provides precise 250 V threshold and low-leakage (<1 µA) behavior, minimizing standby power loss in high-impedance sensing paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ250AHE3/A | Same VWM (250 V), same SMA package, but rated for 400 W only up to 220 V; 300 W above 91 V applies - matches P4SMA250AHM3_A/I's 400 W rating only at lower voltages. | Not AEC-Q101 qualified; suitable for commercial/industrial, not automotive. | Select when AEC-Q101 is not required and cost optimization is prioritized over automotive qualification. |
| 1.5SMC250A | Higher package thermal mass (SMC/DO-214AB), 1.5 kW peak power rating, but larger footprint and 150 °C TJ max - same clamping (344 V) and VBR range. | Used where PCB space allows larger package and higher single-pulse energy handling is needed (e.g., utility meter surge protection). | Choose for applications requiring >400 W single-event capability or improved thermal dissipation without layout change to SMA. |
Compared with SMAJ250AHE3/A, P4SMA250AHM3_A/I offers AEC-Q101 qualification and consistent 400 W rating at 250 V; versus 1.5SMC250A, it trades peak power for compact SMA footprint and automotive compliance - making it optimal for space-constrained, automotive-grade 240 VDC protection.
Availability
P4SMA250AHM3_A/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive power supplies, telecom rectifiers, and renewable energy inverters requiring stable component supply, AEC-Q101 validation, and consistent 250 V standoff performance.
Supply support for P4SMA250AHM3_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 designs and manufactures discrete semiconductors including diodes, MOSFETs, and optoelectronics, with emphasis on high-reliability, high-efficiency, and application-specific solutions.
The P4SMA Series targets surface-mount transient suppression in space-constrained, high-reliability applications - especially automotive, industrial, and telecom systems requiring AEC-Q101 compliance and stable clamping performance across temperature.
FAQ
What is the clamping voltage of the P4SMA250AHM3_A/I at its rated peak pulse current?
The P4SMA250AHM3_A/I clamps to 344 V at its specified peak pulse current (IPPM) of 0.87 A under the standard 10/1000 µs waveform. This value is measured and guaranteed per the Vishay datasheet (Document Number 88367, Rev. 09-Jan-2024), and defines the maximum voltage seen by protected circuitry during a transient event. The P4SMA250AHM3_A/I maintains this clamping performance across its full operating temperature range when mounted on the recommended 5.0 mm × 5.0 mm copper pads.
Is the P4SMA250AHM3_A/I qualified for automotive applications?
Yes, the P4SMA250AHM3_A/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in the Vishay P4SMA Series datasheet. The HM3 designation indicates halogen-free, RoHS-compliant construction plus full AEC-Q101 stress testing - including temperature cycling, high-temperature reverse bias, and ESD. This makes the P4SMA250AHM3_A/I suitable for under-hood and chassis-mounted automotive electronics where reliability under thermal and mechanical stress is mandatory.
What does the "_A/I" suffix mean in P4SMA250AHM3_A/I?
The "_A/I" suffix in P4SMA250AHM3_A/I specifies two key attributes: "A" denotes the revision level (Revision A per ordering table footnote 2), and "I" indicates packaging in 13-inch diameter plastic tape and reel, with a base quantity of 7500 units. This format aligns with Vishay's standardized ordering nomenclature and ensures traceability, automated placement compatibility, and consistent reel-based logistics for high-volume manufacturing of the P4SMA250AHM3_A/I.
How does the thermal resistance of the P4SMA250AHM3_A/I affect PCB layout?
The P4SMA250AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under sustained power dissipation or repetitive surges, PCB layout must replicate this pad size and ensure adequate copper pour connectivity. Reducing pad area increases RθJA, risking thermal runaway during multiple transients - so the P4SMA250AHM3_A/I's layout guidance is non-negotiable for rated performance.
Can the P4SMA250AHM3_A/I be used in bidirectional configurations?
No, the P4SMA250AHM3_A/I is a unidirectional TVS diode, as indicated by its "A" suffix (not "CA") and absence of bidirectional VBR/VWM specifications in its row of the electrical characteristics table. Bidirectional variants in the P4SMA family use "CA" suffixes (e.g., P4SMA250CA) and exhibit symmetrical breakdown in both polarities. Using the unidirectional P4SMA250AHM3_A/I in reverse-biased AC or floating applications risks permanent failure - always verify polarity alignment in circuit design for the P4SMA250AHM3_A/I.
P4SMA250AHM3_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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 214V
- Voltage - Breakdown (Min):
- 237V
- Voltage - Clamping (Max) @ Ipp:
- 344V
- Current - Peak Pulse (10/1000µs):
- 870mA
- 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)
P4SMA250AHM3_A/I FAQ
1.How can I place an order for P4SMA250AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA250AHM3_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 P4SMA250AHM3_A/I reliable?
The price and inventory of P4SMA250AHM3_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 P4SMA250AHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA250AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA250AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA250AHM3_A/I?
P4SMA250AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA250AHM3_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 P4SMA250AHM3_A/I?
For technical support, including P4SMA250AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA250AHM3_A/I requirements.
6.How does Aetrix verify that P4SMA250AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA250AHM3_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 P4SMA250AHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA250AHM3_A/I?
All P4SMA250AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA250AHM3_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 P4SMA250AHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA250AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA250AHM3_A/I Tags
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