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Vishay General Semiconductor - Diodes Division P4SMA440A-M3/5A
- Part No.:
- P4SMA440A-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA440A-M3/5A.pdf
- Description:
- TVS DIODE 376VWM 602VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA440A-M3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 440 V standoff voltage (VWM), 462 V maximum breakdown voltage (VBR), 602 V clamping voltage (VC) at 0.5 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching spikes in industrial power supplies.
For engineers reviewing the P4SMA440A-M3/5A datasheet, P4SMA440A-M3/5A pinout, P4SMA440A-M3/5A application, or P4SMA440A-M3/5A equivalent, key selection criteria include clamping voltage margin relative to protected circuit's absolute maximum rating, thermal resistance (RθJA = 120 °C/W), unidirectional polarity marking, SMA (DO-214AC) package compatibility with automated placement, and halogen-free RoHS compliance per M3 suffix.
Technical Context
The P4SMA440A-M3/5A operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (418–462 V), thereby diverting transient energy to ground while maintaining low leakage (<1 µA at 376 V). Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
Designed for surface-mount assembly on standard 0.2" × 0.2" copper pads, it delivers 400 W peak pulse power (derated to 300 W above 91 V) with fast response time (<1.0 ns) and low incremental surge resistance - critical for protecting high-voltage DC bus lines and telecom power interfaces where voltage overshoot must be tightly constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 376 V - maximum continuous reverse operating voltage before conduction begins; sets upper limit for normal circuit operation without clamping. |
| VBR (Breakdown Voltage) | 418–462 V at 1.0 mA - guaranteed avalanche initiation range; defines minimum overvoltage level that triggers protection. |
| VC (Clamping Voltage) | 602 V at IPPM = 0.5 A - peak voltage seen by protected circuit during worst-case 10/1000 µs transient; determines safe margin vs. device absolute max rating. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - energy-handling capacity under standardized surge; confirms suitability for IEC 61000-4-5 Level 3/4 surges in industrial equipment. |
| ID (Reverse Leakage) | <1.0 µA at 376 V - negligible standby current; avoids power loss or false triggering in high-impedance sensing nodes. |
| RθJA | 120 °C/W - thermal resistance from junction to ambient; requires adequate PCB copper area (0.2" × 0.2") to maintain TJ ≤ 150 °C under sustained surge duty. |
| Polarity | Unidirectional - cathode marked by band; blocks forward current until VF ≈ 3.5 V at 25 A, enabling use in DC-biased lines only. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, M3 suffix. Cathode indicated by molded band on body. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward bias; tied to lower-potential side of protected line (e.g., GND or return path). | Not active during TVS operation; remains non-conducting unless forward voltage exceeds ~3.5 V - irrelevant in typical reverse-biased protection configuration. |
| Cathode | Current exit point during reverse avalanche; connected to higher-potential side (e.g., +HV rail or signal line). | Marked by visible band; must be routed to the node requiring overvoltage clamping - incorrect orientation disables protection. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 combination wave surges up to 2 kV/12 Ω in industrial power inputs without derating. |
| Low clamping ratio (VC/VBR ≈ 1.30) | Minimizes voltage overshoot during clamping - critical for preserving margin between VC and 650 V-rated MOSFETs or SiC devices. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT reflow profiles without moisture-related popcorning or delamination risk. |
| AEC-Q101 qualified (B-grade variant) | Validated for automotive under-hood applications including battery management and DC-DC converter input stages - though P4SMA440A-M3/5A itself is commercial grade. |
| Glass passivated junction | Ensures stable VBR over temperature (-65 to +150 °C) and long-term reliability under repeated surge stress in harsh environments. |
Applications
| Industrial HV DC Power Input | Telecom Rectifier Output Protection |
|---|---|
|
Use Scenario: Protecting 400 V DC bus in programmable logic controller (PLC) power supply against load dump and lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input terminals to clamp transients before they reach upstream EMI filter and downstream DC-DC converter. Use Value: Clamps 400 V transients to ≤602 V within nanoseconds, preserving 650 V rated MOSFETs and reducing need for oversized input capacitors. |
Use Scenario: Safeguarding output stage of -48 V telecom rectifier modules exposed to backfeed surges and hot-swap events. IC Role / Device Role / Timing Role: TVS mounted directly at rectifier output connector to suppress fast-rising common-mode transients before reaching distribution bus. Use Value: Sub-1 ns response and 602 V VC ensure sensitive telecom ASICs remain below their 650 V absolute maximum rating during 10/1000 µs surges. |
| Motor Drive DC Link Protection | High-Voltage Sensor Interface |
|
Use Scenario: Shielding IGBT gate drivers and current sense amplifiers in 400 V industrial motor drives from inductive kickback during rapid PWM switching. IC Role / Device Role / Timing Role: TVS placed across DC link capacitor terminals to absorb energy from parasitic inductance during short-circuit events. Use Value: 400 W PPPM handles repetitive 100 A+ current spikes without degradation, extending system MTBF in cyclic duty applications. |
Use Scenario: Protecting isolated voltage dividers and ADC front-ends in battery monitoring systems measuring 400 V battery stacks. IC Role / Device Role / Timing Role: TVS installed at sensor input connector to prevent ESD and cable discharge events from damaging precision resistive divider networks. Use Value: <1 µA leakage at 376 V prevents measurement drift; 602 V VC ensures ADC reference rails remain undamaged during 8 kV contact ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ440A | Same VWM (376 V), identical SMA package, but lower PPPM (400 W same), higher VC (648 V at 0.5 A) and wider VBR tolerance (418–484 V). | Higher clamping voltage reduces design margin for 650 V devices; suitable where layout allows tighter thermal management. | Select SMAJ440A only if VC margin permits; verify clamping headroom with actual protected device ratings. |
| 1.5SMC440A | Higher power rating (1500 W), larger SMC (DO-214AB) package, same VWM/VC specs, but incompatible footprint and higher RθJA (60 °C/W vs. 120 °C/W). | Requires PCB redesign; suited for infrequent high-energy surges where space allows larger package and better heat dissipation. | Choose 1.5SMC440A only when surge repetition rate or energy exceeds P4SMA440A-M3/5A capability - not a drop-in replacement. |
Compared with SMAJ440A, P4SMA440A-M3/5A offers tighter clamping (602 V vs. 648 V) and superior thermal performance in compact layouts; versus 1.5SMC440A, it trades peak energy handling for smaller size and automated placement compatibility - making it optimal for space-constrained industrial power modules.
Availability
P4SMA440A-M3/5A is available at Aetrix Electronics and suitable for industrial power supplies, telecom rectifiers, motor drive DC links, and high-voltage sensor interfaces requiring stable component supply, halogen-free compliance, and consistent surge performance across production batches.
Supply support for P4SMA440A-M3/5A 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, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and automotive-grade qualification.
The P4SMA series is engineered for surface-mount transient suppression in high-reliability industrial and telecom infrastructure, balancing high-voltage standoff, precise clamping, and automated assembly compatibility in the SMA footprint.
FAQ
What is the maximum clamping voltage of the P4SMA440A-M3/5A under standard test conditions?
The P4SMA440A-M3/5A 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 per JEDEC standards and represents the highest voltage the device allows across its terminals during a defined transient event - critical for ensuring protected components remain within their absolute maximum voltage ratings. The P4SMA440A-M3/5A achieves this while maintaining sub-1 ns response time and low leakage.
Is the P4SMA440A-M3/5A suitable for automotive applications?
The P4SMA440A-M3/5A is a commercial-grade device with M3 halogen-free RoHS compliance but is not AEC-Q101 qualified. While the P4SMA family includes AEC-Q101 variants (e.g., P4SMA440AHM3_B/I), the P4SMA440A-M3/5A itself is intended for industrial and telecom use. For automotive under-hood applications, engineers should select the HM3_B-suffixed version - the P4SMA440A-M3/5A lacks the required stress testing and traceability documentation for automotive qualification.
What does the "M3" suffix indicate in P4SMA440A-M3/5A?
The "M3" suffix in P4SMA440A-M3/5A denotes halogen-free, RoHS-compliant construction meeting JEDEC J-STD-020 MSL Level 1 requirements and JESD 201 Class 2 whisker resistance. It distinguishes the part from E3 (standard RoHS) and HM3 (AEC-Q101 + halogen-free) variants. The M3 designation confirms compatibility with lead-free reflow processes and environmental compliance for industrial end equipment - a key requirement for EU and Asian market deployments.
How does the P4SMA440A-M3/5A compare to bidirectional TVS diodes like P4SMA440CA?
The P4SMA440A-M3/5A is unidirectional and conducts only during reverse overvoltage, whereas P4SMA440CA is bidirectional and protects both polarities - making it suitable for AC lines or floating signal paths. The P4SMA440A-M3/5A offers tighter VBR tolerance (418–462 V vs. 418–504 V for CA version) and lower leakage in DC-biased applications. Use P4SMA440A-M3/5A where polarity is fixed and clamping precision matters; choose the CA variant only when symmetrical protection is required.
What PCB layout guidance applies to the P4SMA440A-M3/5A for optimal thermal performance?
For reliable operation, the P4SMA440A-M3/5A must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve its specified RθJA of 120 °C/W. Traces should be wide and short to minimize inductance during surge events, and adjacent thermal vias are recommended to enhance heat transfer to inner layers. Avoid placing the P4SMA440A-M3/5A near heat sources or in enclosed areas without airflow - thermal derating begins above 25 °C ambient.
P4SMA440A-M3/5A 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):
- 376V
- Voltage - Breakdown (Min):
- 418V
- Voltage - Clamping (Max) @ Ipp:
- 602V
- Current - Peak Pulse (10/1000µs):
- 500mA
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA440A-M3/5A FAQ
1.How can I place an order for P4SMA440A-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA440A-M3/5A 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 P4SMA440A-M3/5A reliable?
The price and inventory of P4SMA440A-M3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA440A-M3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA440A-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA440A-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA440A-M3/5A?
P4SMA440A-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA440A-M3/5A 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 P4SMA440A-M3/5A?
For technical support, including P4SMA440A-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA440A-M3/5A requirements.
6.How does Aetrix verify that P4SMA440A-M3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA440A-M3/5A 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 P4SMA440A-M3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA440A-M3/5A?
All P4SMA440A-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA440A-M3/5A, 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 P4SMA440A-M3/5A part is unused and in its original packaging.
Return procedure for P4SMA440A-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA440A-M3/5A Tags
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