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Vishay General Semiconductor - Diodes Division P4SMA440A-E3/61
- Part No.:
- P4SMA440A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA440A-E3/61.pdf
- Description:
- TVS DIODE 376VWM 602VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,752
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Product details
Overview
P4SMA440A-E3/61 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 high-voltage power rails and industrial sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the P4SMA440A-E3/61 datasheet, P4SMA440A-E3/61 pinout, P4SMA440A-E3/61 application, or P4SMA440A-E3/61 equivalent, this device delivers verified 400 W peak pulse power (10/1000 µs), AEC-Q101 qualification (via HE3/HM3 variants), RoHS-compliant matte tin terminals, and MSL Level 1 moisture sensitivity - critical for automotive-grade power supply protection and high-reliability industrial control systems.
Technical Context
The P4SMA440A-E3/61 operates as a unidirectional avalanche diode with cathode-band polarity marking, leveraging glass-passivated junction technology for stable reverse breakdown and low incremental surge resistance. Its clamping behavior is defined by a 602 V VC at IPPM = 0.5 A under standardized 10/1000 µs waveform conditions.
Thermal performance is characterized by RθJA = 120 °C/W and RθJL = 30 °C/W, with maximum junction temperature of +150 °C and operating range from –65 °C to +150 °C. It supports repetitive surge duty cycle ≤ 0.01 % and meets UL 94 V-0 flammability rating per molding compound specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 376 V - Maximum continuous reverse working voltage before clamping activation; defines safe operating margin for 400–440 V DC bus protection. |
| VBR (Breakdown Voltage) | 418–462 V at IT = 1.0 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events above nominal rail. |
| VC (Clamping Voltage) | 602 V at IPPM = 0.5 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines downstream component voltage stress. |
| PPPM (Peak Pulse Power) | 400 W - Sustained transient energy absorption capability under standard waveform; validates robustness against IEC 61000-4-5 Level 4 surges. |
| IR (Reverse Leakage) | 1.0 µA at VWM - Ultra-low leakage ensures minimal standby power loss and signal integrity in high-impedance sensing paths. |
| TJ max | +150 °C - Enables operation in under-hood automotive or enclosed industrial enclosures without derating below ambient. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.0 mm × 5.0 mm copper pad thermal design; compatible with automated reflow assembly. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, polarity indicated by cathode band on unidirectional devices. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay thermal guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to system ground or low-side reference; enables unidirectional clamping from rail-to-ground. |
| Cathode | Current exit point during reverse breakdown | Connected to protected line (e.g., 400 V DC bus); defines clamping path to ground when overvoltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable avalanche characteristics over lifetime and temperature; eliminates parameter drift in harsh environments. |
| 400 W peak pulse power (10/1000 µs) | Validated energy-handling capacity for industrial surge immunity standards including IEC 61000-4-5, enabling single-device protection without external series impedance. |
| AEC-Q101 qualified variant available | HE3/HM3 suffix versions meet automotive reliability requirements for powertrain and body electronics - P4SMA440A-E3/61 itself is commercial-grade but shares identical die and package construction. |
| MSL Level 1, peak reflow 260 °C | Supports lead-free soldering without preconditioning; eliminates moisture-related popcorning risk during standard SMT assembly. |
| UL 94 V-0 compliant molding compound | Provides flame-retardant housing essential for safety-critical industrial and transportation equipment meeting EN 60950/EN 62368. |
Applications
| Industrial Motor Drive DC Bus Protection | High-Voltage Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting 400 V DC link in variable-frequency drives from regenerative braking spikes and contactor bounce transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between DC+ rail and chassis ground to clamp positive-going surges exceeding 440 V. Use Value: Limits transient voltage to ≤602 V, preventing gate oxide damage to IGBT modules and maintaining SIL-2 functional safety compliance. |
Use Scenario: Shielding analog front-end inputs of isolated voltage sensors monitoring HV battery stacks in energy storage systems. IC Role / Device Role / Timing Role: Rail-to-ground clamping element on secondary-side signal lines referenced to floating 300–500 V domains. Use Value: Maintains <1.0 µA leakage at 376 V, preserving measurement accuracy while surviving 4 kV ESD and 2 kV surge events. |
| Telecom Power Feeding Equipment | Renewable Energy Inverter DC Input Stage |
Use Scenario: Safeguarding -48 V to -60 V telecom rectifier outputs feeding remote radio units, where lightning-induced common-mode surges couple onto DC feed lines. IC Role / Device Role / Timing Role: Cathode-connected to negative output rail, anode to earth ground - clamps negative surges relative to ground reference. Use Value: Withstands 400 W pulses without degradation, meeting Telcordia GR-1089-CORE Level 3 surge immunity for outdoor base station infrastructure. |
Use Scenario: Protecting MPPT controller inputs connected to photovoltaic string outputs reaching up to 1500 VDC in utility-scale solar farms. IC Role / Device Role / Timing Role: Used in stacked configuration (e.g., two P4SMA440A in series) to extend clamping range to ~880 V while retaining fast response. Use Value: Enables modular, cost-effective overvoltage protection architecture with validated 602 V clamping per device and <1 ns response time. |
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-E3/5A | Same VWM/VBR/VC specs, identical SMA package, but rated for 400 W with tighter VC tolerance (±5 % vs ±10 % for P4SMA series) and lower RθJA (100 °C/W). | Better thermal performance suits higher ambient temperature PCB layouts; preferred for space-constrained designs requiring marginally improved clamping consistency. | Select SMAJ440A-E3/5A when board-level thermal management is limited and tighter VC spec is required for downstream IC voltage margining. |
| 1.5SMC440A | Higher PPPM (1500 W), larger SMC (DO-214AB) package, same VWM/VBR/VC, but 3× footprint area and 2.5× weight. | Used where surge energy exceeds 400 W or where mechanical robustness against vibration is prioritized over board space. | Choose 1.5SMC440A only when tested surge profiles exceed 400 W or when legacy SMC footprint compatibility is mandatory. |
Compared with SMAJ440A-E3/5A, P4SMA440A-E3/61 offers lower cost and identical electrical protection in compact SMA layout but trades off thermal efficiency and VC precision; versus 1.5SMC440A, it sacrifices surge headroom for 60 % smaller PCB area and full compatibility with high-speed pick-and-place systems.
Availability
P4SMA440A-E3/61 is available at Aetrix Electronics and suitable for industrial motor drives, renewable energy inverters, telecom power systems, and high-voltage sensor interfaces requiring stable component supply across multi-year production cycles.
Supply support for P4SMA440A-E3/61 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, power handling, and automotive-grade qualification.
The P4SMA Series targets cost-sensitive, high-volume transient protection needs in consumer, industrial, and telecom markets, delivering standardized TVS performance in compact surface-mount packages with scalable voltage coverage from 6.8 V to 540 V.
FAQ
What is the maximum clamping voltage of the P4SMA440A-E3/61 under standard surge conditions?
The P4SMA440A-E3/61 has a maximum clamping voltage (VC) of 602 V at 0.5 A peak pulse current (IPPM) using the industry-standard 10/1000 µs double-exponential waveform. This value is measured per Figure 1 in Vishay document 88367 and defines the upper voltage limit imposed on protected circuits during transient events. The P4SMA440A-E3/61 maintains this clamping performance across its specified operating temperature range.
Is the P4SMA440A-E3/61 suitable for automotive applications?
The P4SMA440A-E3/61 itself is a commercial-grade part (E3 suffix), but Vishay offers AEC-Q101 qualified versions under HE3 and HM3 suffixes (e.g., P4SMA440AHE3_B). These variants share identical electrical specs and SMA package, differing only in enhanced process controls and test screening. For automotive use, specify the HE3/HM3 version; the P4SMA440A-E3/61 remains appropriate for non-automotive industrial or telecom systems.
What is the thermal resistance of the P4SMA440A-E3/61, and how does it affect PCB layout?
The P4SMA440A-E3/61 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. This value assumes minimum recommended pad layout per Vishay's mechanical drawings. To avoid thermal derating, PCB layout must replicate these pad dimensions and ensure adequate copper pour connectivity. The P4SMA440A-E3/61's RθJL of 30 °C/W further emphasizes the need for short, wide traces to thermal planes.
Does the P4SMA440A-E3/61 have bidirectional capability?
No - the P4SMA440A-E3/61 is a unidirectional TVS diode, indicated by the "A" suffix (as opposed to "CA" for bidirectional). It conducts only in reverse breakdown mode (cathode to anode) and blocks forward current like a standard rectifier. For bidirectional protection, Vishay offers P4SMA440CA variants. The P4SMA440A-E3/61 must be oriented with cathode toward the protected line and anode to ground to function correctly.
What is the reverse leakage current of the P4SMA440A-E3/61 at its rated standoff voltage?
The P4SMA440A-E3/61 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its rated standoff voltage (VWM) of 376 V, measured at TA = 25 °C. This ultra-low leakage preserves signal integrity in high-impedance monitoring circuits and minimizes standby power loss in always-on systems. The P4SMA440A-E3/61 maintains leakage below 5 µA up to TJ = 125 °C per Vishay's derating curves.
P4SMA440A-E3/61 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:
- Obsolete
- 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-E3/61 FAQ
1.How can I place an order for P4SMA440A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA440A-E3/61 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-E3/61 reliable?
The price and inventory of P4SMA440A-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA440A-E3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA440A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA440A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA440A-E3/61?
P4SMA440A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA440A-E3/61 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-E3/61?
For technical support, including P4SMA440A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA440A-E3/61 requirements.
6.How does Aetrix verify that P4SMA440A-E3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA440A-E3/61 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-E3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA440A-E3/61?
All P4SMA440A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA440A-E3/61, 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-E3/61 part is unused and in its original packaging.
Return procedure for P4SMA440A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA440A-E3/61 Tags
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