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Vishay General Semiconductor - Diodes Division P4SMA440AHM3_A/I
- Part No.:
- P4SMA440AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA440AHM3_A/I.pdf
- Description:
- TVS DIODE 376VWM 602VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,116
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Product details
Overview
P4SMA440AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 440 V standoff voltage (VWM), 462 V maximum breakdown voltage (VBR), and 602 V clamping voltage (VC) at 0.5 A peak pulse current (IPPM), designed to protect power rails and signal lines in industrial power supplies and automotive ECUs against lightning-induced surges and inductive switching transients.
For engineers reviewing the P4SMA440AHM3_A/I datasheet, P4SMA440AHM3_A/I pinout, P4SMA440AHM3_A/I application, or P4SMA440AHM3_A/I equivalent, this device delivers verified 400 W peak pulse power (10/1000 µs), AEC-Q101 qualification for automotive use, halogen-free RoHS compliance, and MSL Level 1 moisture sensitivity - critical for high-reliability board-level surge protection design and BOM continuity planning.
Technical Context
The P4SMA440AHM3_A/I operates as a unidirectional clamping TVS diode with glass-passivated junction, enabling fast response (<1 ns) to transient overvoltages while maintaining low incremental surge resistance. Its 440 V VWM ensures compatibility with 400 V DC bus systems, and its 602 V VC limits downstream voltage stress during 0.5 A 10/1000 µs surges.
Thermally, it features RθJA = 120 °C/W and RθJL = 30 °C/W, requiring minimum 5.0 mm × 5.0 mm copper pads per terminal for full 400 W rating. It supports repetitive surge duty cycle ≤0.01% and is qualified to AEC-Q101, confirming robustness for automotive under-hood environments up to TJ = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 440 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected circuit DC rail. |
| VBR (Breakdown Voltage) | 418–462 V at IT = 1 mA - Confirmed voltage range where device transitions from high-impedance to low-impedance clamping state. |
| VC (Clamping Voltage) | 602 V at IPPM = 0.5 A (10/1000 µs) - Peak voltage seen by protected IC/MOSFET during specified surge event. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability under standardized 10/1000 µs waveform; derates above TA = 25 °C. |
| ID (Reverse Leakage) | 1.0 µA max at VWM = 440 V - Ensures negligible standby current draw in high-impedance circuits. |
| TJ max | 150 °C - Maximum junction temperature; enables operation in under-hood automotive and industrial ambient conditions. |
| Package | SMA (DO-214AC) - Surface-mount package with 5.28 mm × 4.50 mm footprint, compatible with automated placement and reflow. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-voltage reference; completes clamping path during positive transients. |
| Cathode | High-side connection point | Connected to protected line (e.g., 400 V DC bus); conducts during overvoltage events to shunt current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and battery management systems under temperature cycling, humidity, and mechanical stress. |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-020 MSL Level 1, supporting lead-free reflow and environmental compliance programs. |
| 400 W peak pulse power (10/1000 µs) | Provides robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) when mounted on recommended 5.0 mm × 5.0 mm copper pads. |
| Low clamping ratio (VC/VBR ≈ 1.30) | Minimizes overvoltage overshoot during clamping, reducing stress on downstream MOSFETs and controllers in high-voltage power stages. |
| Glass passivated junction | Ensures stable leakage and breakdown characteristics across temperature and long-term operation, critical for field reliability. |
Applications
| Industrial Power Supply Protection | Automotive ECU Input Protection |
|---|---|
Use Scenario: Surge suppression on 400 V DC input stage of industrial AC/DC converters exposed to load dump and lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between DC bus and ground to limit transient voltage spikes. Use Value: Limits peak voltage to 602 V during 0.5 A 10/1000 µs transients, preventing damage to primary-side MOSFETs and controller ICs. |
Use Scenario: Protection of 12 V/24 V auxiliary supply inputs in automotive engine control units subjected to ISO 7637-2 pulse 5a/b (load dump). IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing high-energy transients before they reach LDOs and microcontrollers. Use Value: Withstands 400 W pulses and operates up to 150 °C junction temperature, meeting AEC-Q101 requirements for under-hood deployment. |
| Telecom Rectifier Output Clamping | Motor Drive DC Link Snubbing |
Use Scenario: Clamping overvoltage on +48 V telecom rectifier outputs during hot-swap or short-circuit recovery events. IC Role / Device Role / Timing Role: Fast-response unidirectional suppressor placed across output terminals to clamp voltage excursions. Use Value: 1.0 µA leakage at 440 V ensures minimal impact on regulation accuracy; 602 V VC prevents latch-up in downstream PMICs. |
Use Scenario: Suppressing inductive kickback from IGBT gate drivers and snubber networks in 400 V motor inverters. IC Role / Device Role / Timing Role: High-voltage TVS connected across DC link capacitors to absorb commutation spikes. Use Value: 440 V VWM matches nominal DC link voltage; 400 W rating handles repetitive switching surges without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ440A | Same VWM (440 V), but SMB package (DO-214AA); 600 W PPPM rating; higher RθJA (150 °C/W). | Better power handling but larger footprint; less suitable for space-constrained automotive modules. | Select when higher pulse power margin is required and PCB area allows SMB footprint. |
| SMCJ440A | Same VWM (440 V), SMC package (DO-214AB); 1500 W PPPM; RθJA = 100 °C/W; larger body size. | Designed for higher-energy transients (e.g., IEC 61000-4-5 Level 5); not AEC-Q101 qualified in standard grade. | Choose for industrial mains-connected equipment needing >1 kW surge immunity; verify automotive qualification separately. |
Compared with P4SMA440AHM3_A/I, SMBJ440A offers higher pulse power but requires more PCB area and lacks AEC-Q101 certification in base variants, while SMCJ440A delivers superior energy handling at the cost of footprint and automotive qualification - making P4SMA440AHM3_A/I the optimal balance of compactness, qualification, and 400 V system compatibility.
Availability
P4SMA440AHM3_A/I is available at Aetrix Electronics and suitable for industrial power supplies, automotive electronic control units, telecom rectifiers, and motor drive DC link protection requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for P4SMA440AHM3_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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The P4SMA Series targets high-voltage transient suppression in space-constrained applications, combining AEC-Q101 qualification, low-profile SMA packaging, and precise clamping performance for automotive, industrial, and telecom power systems.
FAQ
What is the clamping voltage of the P4SMA440AHM3_A/I at its rated peak pulse current?
The P4SMA440AHM3_A/I has a maximum clamping voltage (VC) of 602 V at 0.5 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The P4SMA440AHM3_A/I maintains this clamping performance across its operational temperature range and is validated per JEDEC standards.
Is the P4SMA440AHM3_A/I qualified for automotive applications?
Yes, the P4SMA440AHM3_A/I is AEC-Q101 qualified, as confirmed by Vishay's documentation and ordering code suffix "HM3_A/I", where "HM3" denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction. This qualification covers stress tests including temperature cycling, humidity bias, and mechanical shock, making the P4SMA440AHM3_A/I suitable for under-hood automotive ECUs and battery management systems.
What is the standoff voltage rating of the P4SMA440AHM3_A/I, and how does it relate to system design?
The P4SMA440AHM3_A/I has a standoff voltage (VWM) of 440 V, meaning it remains non-conductive up to this DC or RMS voltage level. This rating directly determines compatibility with 400 V nominal DC bus systems - such as those found in industrial inverters and telecom rectifiers - ensuring reliable operation without leakage or premature conduction. The P4SMA440AHM3_A/I's 440 V VWM provides sufficient margin above typical 400 V rails while enabling effective transient clamping.
Does the P4SMA440AHM3_A/I require special PCB layout considerations?
Yes, the P4SMA440AHM3_A/I must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve its full 400 W peak pulse power rating. Smaller pads reduce thermal dissipation and cause premature failure under surge conditions. The P4SMA440AHM3_A/I also requires short, low-inductance traces to the protected node and ground plane to preserve sub-nanosecond response time and minimize voltage overshoot during fast transients.
What is the maximum junction temperature and thermal resistance of the P4SMA440AHM3_A/I?
The P4SMA440AHM3_A/I has a maximum junction temperature (TJ max) of +150 °C and typical thermal resistance from junction to ambient (RθJA) of 120 °C/W. Its junction-to-lead resistance (RθJL) is 30 °C/W, indicating efficient heat transfer to PCB copper when properly soldered. These values enable reliable operation in high-ambient environments such as automotive engine compartments and industrial enclosures, provided thermal pad layout meets Vishay's specifications.
P4SMA440AHM3_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):
- 376V
- Voltage - Breakdown (Min):
- 418V
- Voltage - Clamping (Max) @ Ipp:
- 602V
- Current - Peak Pulse (10/1000µs):
- 500mA
- 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)
P4SMA440AHM3_A/I FAQ
1.How can I place an order for P4SMA440AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA440AHM3_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 P4SMA440AHM3_A/I reliable?
The price and inventory of P4SMA440AHM3_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 P4SMA440AHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA440AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA440AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA440AHM3_A/I?
P4SMA440AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA440AHM3_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 P4SMA440AHM3_A/I?
For technical support, including P4SMA440AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA440AHM3_A/I requirements.
6.How does Aetrix verify that P4SMA440AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA440AHM3_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 P4SMA440AHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA440AHM3_A/I?
All P4SMA440AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA440AHM3_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 P4SMA440AHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA440AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA440AHM3_A/I Tags
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