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Vishay General Semiconductor - Diodes Division P4SMA250AHM3_B/I
- Part No.:
- P4SMA250AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA250AHM3_B/I.pdf
- Description:
- TVS DIODE 214VWM 344VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,245
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Product details
Overview
P4SMA250AHM3_B/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 provides robust overvoltage protection for high-voltage DC rails in automotive power electronics and industrial motor drives.
For engineers reviewing the P4SMA250AHM3_B/I datasheet, P4SMA250AHM3_B/I pinout, P4SMA250AHM3_B/I application, or P4SMA250AHM3_B/I equivalent, key selection criteria include clamping voltage at rated surge current, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), and halogen-free RoHS compliance per M3 suffix.
Technical Context
This device operates as a unidirectional clamping TVS diode with avalanche breakdown behavior, designed to shunt transient energy above its VBR threshold while maintaining low clamping voltage (VC = 344 V at IPPM). Its glass-passivated junction ensures stable leakage performance and fast response time (<1 ns).
Rated for 150 °C maximum junction temperature and qualified to AEC-Q101, the P4SMA250AHM3_B/I supports automotive-grade reliability under repetitive surge conditions (0.01% duty cycle) and meets J-STD-020 MSL Level 1 reflow requirements with 260 °C peak soldering profile.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 214 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (Breakdown Voltage) | 237–263 V at 1 mA - Confirmed avalanche onset range defining reliable triggering threshold |
| VC (Clamping Voltage) | 344 V at IPPM - Peak voltage seen by protected circuit during 400 W transient event |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - Surge energy handling capacity on standard 5.0 mm × 5.0 mm copper pads |
| ID (Reverse Leakage) | 1.0 µA at VWM - Low leakage preserves system efficiency in high-impedance bias networks |
| TJ max | 150 °C - Enables operation in under-hood automotive environments and enclosed industrial enclosures |
| RθJA | 120 °C/W - Thermal resistance informs heatsinking requirements for sustained power dissipation |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity indicated by cathode band. Matte tin-plated leads, compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point for reverse-biased clamping | Connected to protected line; conducts when transient exceeds VBR, shunting current to ground |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes clamping current path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and battery management systems |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance mandates for global OEM supply chains without compromising surge robustness |
| 400 W peak pulse power (10/1000 µs) | Handles IEC 61000-4-5 Level 4 surges (4 kV) on 24 V/48 V/110 V DC systems with margin |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., inductive switch-off in solenoid drivers) |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture-related defects or parametric shift |
Applications
| Automotive Engine Control Unit (ECU) | Industrial DC Motor Drive Input Stage |
|---|---|
Use Scenario: Protection of microcontroller I/O and CAN transceiver power rails against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between 24 V supply rail and chassis ground. Use Value: Limits transient voltage to ≤344 V during 400 W surges, preventing latch-up or gate oxide damage in downstream PMICs and interface ICs. | Use Scenario: Safeguarding rectified 300–400 V DC bus inputs in variable-frequency drives from switching-induced voltage spikes. IC Role / Device Role / Timing Role: High-voltage standoff TVS connected across input terminals to clamp fast-rising transients from IGBT commutation. Use Value: Withstands repeated 214 V continuous operation and clamps 10/1000 µs surges to 344 V, preserving IGBT gate driver integrity and reducing snubber losses. |
| Telecom Power Supply Output | Renewable Energy Inverter DC Link |
Use Scenario: Secondary-side overvoltage suppression on +48 V telecom power distribution boards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on output rail, coordinated with upstream MOVs and fuses. Use Value: Provides precise 214 V clamping threshold and sub-µA leakage, enabling stable regulation without loading feedback networks. | Use Scenario: DC link protection in solar string inverters where PV array open-circuit voltage reaches 600–1000 V under cold conditions. IC Role / Device Role / Timing Role: Auxiliary clamping stage for transient suppression between high-voltage DC bus and ground reference. Use Value: Operates reliably up to 150 °C ambient and delivers repeatable 344 V clamping, supporting long-term field reliability in desert installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ250A | Same VWM/VBR/VC ratings but SMB (DO-214AA) package; 10% larger footprint; RθJA = 110 °C/W | Better thermal performance but requires PCB layout change; not drop-in compatible | Select when board space allows larger pad layout and higher continuous power derating is needed |
| 1.5KE250A | Through-hole TO-204AE (DO-41); 1500 W rating but slower response; no AEC-Q101 qualification | Higher peak power but unsuitable for automated SMT lines or automotive vibration environments | Choose only for legacy through-hole designs where rework is acceptable and AEC-Q101 is not required |
Compared with SMBJ250A and 1.5KE250A, the P4SMA250AHM3_B/I offers optimal balance of AEC-Q101 qualification, SMT compatibility, and compact SMA footprint-critical for space-constrained automotive modules and high-density industrial PCBs.
Availability
P4SMA250AHM3_B/I is available at Aetrix Electronics and suitable for automotive ECU protection, industrial motor drive input stages, and telecom power supply outputs requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for P4SMA250AHM3_B/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The P4SMA Series is engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where consistent clamping behavior and long-term stability under thermal cycling are essential.
FAQ
What is the maximum clamping voltage of the P4SMA250AHM3_B/I under rated surge conditions?
The P4SMA250AHM3_B/I has a maximum clamping voltage (VC) of 344 V when subjected to its rated peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at the specified test current and reflects the actual voltage imposed on the protected circuit during transient suppression. The P4SMA250AHM3_B/I maintains this clamping performance across its full operating temperature range and after multiple surge events, provided derating guidelines from Figure 2 are followed.
Is the P4SMA250AHM3_B/I qualified for automotive applications?
Yes, the P4SMA250AHM3_B/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3_B", where "HM3" denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction. This qualification covers stress tests including high-temperature operating life, temperature cycling, and mechanical shock-making the P4SMA250AHM3_B/I suitable for under-hood and chassis-mounted automotive electronics such as body control modules and ADAS power supplies.
What does the "HM3_B/I" suffix indicate in P4SMA250AHM3_B/I?
The "HM3_B/I" suffix in P4SMA250AHM3_B/I specifies three critical attributes: "H" indicates halogen-free material composition; "M3" confirms RoHS compliance and AEC-Q101 qualification; "B" denotes the revision level for devices rated 250 V to 540 V; and "I" signifies packaging in 13-inch tape-and-reel format with 7500 units per reel. This full suffix ensures traceability to Vishay's certified manufacturing lot and environmental compliance documentation for the P4SMA250AHM3_B/I.
How does the thermal resistance of the P4SMA250AHM3_B/I affect its power handling capability?
The P4SMA250AHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads. This value directly limits its continuous power dissipation (PD = 3.3 W) and dictates derating above 25 °C ambient-per Figure 2 in the datasheet. For example, at 85 °C ambient, the P4SMA250AHM3_B/I must be derated to ~1.8 W continuous dissipation to maintain TJ ≤ 150 °C, though its 400 W pulse rating remains unaffected for short-duration transients.
Can the P4SMA250AHM3_B/I be used in bidirectional configurations?
No, the P4SMA250AHM3_B/I is a unidirectional TVS diode, as indicated by its "A" suffix and absence of "CA" in the part number. Bidirectional variants (e.g., P4SMA250CA) exist in the same series but feature symmetric breakdown in both polarities. Using the unidirectional P4SMA250AHM3_B/I in bidirectional signal lines would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit. Always verify polarity marking (cathode band) and match device type to system grounding architecture before deploying the P4SMA250AHM3_B/I.
P4SMA250AHM3_B/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):
- 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:
- -
- 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_B/I FAQ
1.How can I place an order for P4SMA250AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA250AHM3_B/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_B/I reliable?
The price and inventory of P4SMA250AHM3_B/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_B/I is usually 5 days.
3.What payment methods are accepted for P4SMA250AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA250AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA250AHM3_B/I?
P4SMA250AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA250AHM3_B/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_B/I?
For technical support, including P4SMA250AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA250AHM3_B/I requirements.
6.How does Aetrix verify that P4SMA250AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All P4SMA250AHM3_B/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_B/I meets industry standards.
7.What is the process for return or replacement of P4SMA250AHM3_B/I?
All P4SMA250AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA250AHM3_B/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_B/I part is unused and in its original packaging.
Return procedure for P4SMA250AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA250AHM3_B/I Tags
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