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Vishay General Semiconductor - Diodes Division P4SMA250AHM3_B/H
- Part No.:
- P4SMA250AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA250AHM3_B/H.pdf
- Description:
- TVS DIODE 214VWM 344VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,635
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Product details
Overview
P4SMA250AHM3_B/H 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 clamping protection for high-voltage DC rails in automotive power modules and industrial motor drives.
For engineers reviewing the P4SMA250AHM3_B/H datasheet, P4SMA250AHM3_B/H pinout, P4SMA250AHM3_B/H application, or P4SMA250AHM3_B/H equivalent, key selection criteria include its AEC-Q101 qualification, 344 V maximum clamping voltage at peak current, -65 °C to +150 °C operating junction temperature range, and halogen-free RoHS-compliant construction under HM3 suffix.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging glass-passivated junction technology for stable avalanche behavior under repetitive transient stress. Its thermal resistance (RθJA = 120 °C/W) and low incremental surge resistance enable reliable energy absorption without thermal runaway during 10/1000 µs surges up to 0.87 A peak pulse current.
The device meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow compatibility and is qualified to AEC-Q101 for automotive underhood applications. Its 214 V standoff voltage and 263 V breakdown threshold are specified at 1.0 mA test current, with temperature coefficient of VBR at +0.110 %/°C - critical for high-temperature stability in engine control units.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 214 V - maximum continuous reverse voltage before conduction begins; defines safe operating DC rail margin |
| VBR (Breakdown Voltage) | 237–263 V at 1.0 mA - precise avalanche onset range ensures predictable clamping initiation |
| VC (Clamping Voltage) | 344 V at IPPM - limits transient voltage seen by protected downstream ICs or MOSFETs |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - sustains high-energy transients common in automotive load-dump events |
| IPPM (Peak Pulse Current) | 0.87 A - peak surge current capability under standardized waveform; determines PCB trace sizing |
| TJ max. | +150 °C - enables use in under-hood environments without derating below ambient 125 °C |
| AEC-Q101 Qualified | Yes - validated for automotive reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002. Cathode identified by black band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to ground or low-impedance reference; must be routed with minimal inductance |
| Cathode | Protected line connection point | Connected to the line being protected (e.g., 24 V battery rail); marked with band |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Supports ISO 7637-2 Pulse 5a load-dump protection in 24 V automotive systems |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive under-hood deployment including thermal shock and humidity testing |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-20E environmental compliance requirements |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without moisture sensitivity concerns |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift |
Applications
| Automotive Engine Control Unit (ECU) | Industrial DC Motor Drive |
|---|---|
Use Scenario: Protection against load-dump transients on 24 V supply rail during alternator disconnection. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤344 V, preventing damage to 40 V-rated input MOSFETs and controller ICs. |
Use Scenario: Suppressing inductive kickback from brushed DC motor commutation in factory automation drives. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected across motor terminals to absorb stored inductive energy. Use Value: Absorbs 400 W pulses without degradation, maintaining system uptime in high-cycle-duty environments. |
| Telecom Power Supply Input | Renewable Energy Inverter DC Link |
Use Scenario: Guarding primary-side rectifier output against lightning-induced surges on outdoor telecom cabinet inputs. IC Role / Device Role / Timing Role: High-VWM TVS placed after bulk filter capacitor to clamp fast-rising line transients. Use Value: Withstands 214 V continuous operation while clamping 1 kV surges to safe levels for downstream regulators. |
Use Scenario: Protecting IGBT gate drivers from voltage spikes caused by stray inductance in high-current PV inverter DC bus connections. IC Role / Device Role / Timing Role: Localized clamping device mounted directly at DC link capacitor terminals. Use Value: Fast response time and low clamping ratio (VC/VBR ≈ 1.3) prevent false triggering of driver protection circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ250A-E3/5A | Same VWM/VBR/VC specs, but commercial-grade (E3), not AEC-Q101 qualified; RθJA = 125 °C/W | Lacks automotive qualification; suitable for industrial/commercial power supplies only | Select when AEC-Q101 is not required and cost optimization is prioritized |
| 1.5SMC250AHE3_A | Higher package thermal mass (SMC vs SMA); same electrical specs; 1.5 kW rating but derated to 400 W at 250 V | Bulkier footprint (7.11 × 6.22 mm vs SMA's 4.5 × 2.79 mm); better heat dissipation in high-ambient designs | Choose when board space allows and higher thermal margin is needed for sustained surge duty |
Compared with P4SMA250AHM3_B/H, SMAJ250A-E3/5A offers identical clamping performance without automotive qualification, while 1.5SMC250AHE3_A trades compactness for improved thermal handling - making P4SMA250AHM3_B/H optimal for space-constrained AEC-Q101 designs.
Availability
P4SMA250AHM3_B/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial motor drives, telecom power inputs, and renewable energy inverters requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA250AHM3_B/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The P4SMA Series is designed for robust transient suppression in harsh environments - particularly targeting automotive, industrial, and telecom systems where high-voltage clamping, AEC-Q101 compliance, and surface-mount manufacturability are essential.
FAQ
What is the maximum clamping voltage of the P4SMA250AHM3_B/H under standard test conditions?
The P4SMA250AHM3_B/H has a maximum clamping voltage (VC) of 344 V when subjected to its rated peak pulse current (IPPM = 0.87 A) using a 10/1000 µs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream components like 40 V MOSFETs remain within safe operating area. The P4SMA250AHM3_B/H maintains this clamping performance across its full operating temperature range.
Is the P4SMA250AHM3_B/H suitable for automotive applications?
Yes, the P4SMA250AHM3_B/H is explicitly AEC-Q101 qualified, as confirmed by its HM3 suffix and Vishay documentation. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias (HTRB), and ESD qualification - making it suitable for under-hood automotive applications such as engine control units, body control modules, and ADAS power supplies. The P4SMA250AHM3_B/H also meets MSL Level 1 and supports lead-free reflow up to 260 °C.
What does the "HM3" suffix indicate in P4SMA250AHM3_B/H?
The "HM3" suffix in P4SMA250AHM3_B/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Specifically, "H" indicates the tape-and-reel packaging format (1800 units per 7-inch reel), and "M3" confirms halogen-free molding compound and plating meeting JEDEC standards. This distinguishes it from commercial-grade variants (e.g., E3) and non-automotive HM3 versions - ensuring the P4SMA250AHM3_B/H meets both environmental and automotive reliability mandates.
How does the P4SMA250AHM3_B/H compare to bidirectional TVS diodes in the same series?
The P4SMA250AHM3_B/H is unidirectional, meaning it conducts only during reverse-biased transients and blocks forward current - ideal for DC rail protection where polarity is fixed. Bidirectional variants (e.g., P4SMA250CA) offer symmetrical clamping for AC or floating lines but exhibit higher leakage and reduced VWM headroom. For 24 V automotive battery inputs, the P4SMA250AHM3_B/H delivers superior standoff margin (214 V vs. ~185 V max for bidirectional) and lower capacitance, making it the preferred choice for polarized DC systems.
What is the thermal resistance and power derating behavior of the P4SMA250AHM3_B/H?
The P4SMA250AHM3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" copper pads. Its peak pulse power rating of 400 W applies only at TA = 25 °C; above that, derating follows Fig. 2 in the datasheet - e.g., at 85 °C ambient, usable PPPM drops to ~280 W. Continuous power dissipation (PD) remains 3.3 W regardless of temperature. This behavior is integral to thermal design of the P4SMA250AHM3_B/H in enclosed enclosures or high-ambient environments.
P4SMA250AHM3_B/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):
- 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/H FAQ
1.How can I place an order for P4SMA250AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA250AHM3_B/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 P4SMA250AHM3_B/H reliable?
The price and inventory of P4SMA250AHM3_B/H 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/H is usually 5 days.
3.What payment methods are accepted for P4SMA250AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA250AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA250AHM3_B/H?
P4SMA250AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA250AHM3_B/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 P4SMA250AHM3_B/H?
For technical support, including P4SMA250AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA250AHM3_B/H requirements.
6.How does Aetrix verify that P4SMA250AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All P4SMA250AHM3_B/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 P4SMA250AHM3_B/H meets industry standards.
7.What is the process for return or replacement of P4SMA250AHM3_B/H?
All P4SMA250AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA250AHM3_B/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 P4SMA250AHM3_B/H part is unused and in its original packaging.
Return procedure for P4SMA250AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA250AHM3_B/H Tags
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