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Vishay General Semiconductor - Diodes Division P4SMA440AHE3_A/H
- Part No.:
- P4SMA440AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA440AHE3_A/H.pdf
- Description:
- TVS DIODE 376VWM 602VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA440AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the P4SMA series, designed for high-energy surge protection on DC power rails 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 (IPPM), and 400 W peak pulse power rating with a 10/1000 µs waveform - suitable for automotive-grade overvoltage protection in engine control units and battery management systems.
For engineers reviewing the P4SMA440AHE3_A/H datasheet, P4SMA440AHE3_A/H pinout, P4SMA440AHE3_A/H application, or P4SMA440AHE3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, SMA (DO-214AC) package compatibility, unidirectional polarity with cathode band marking, and thermal resistance (RθJA = 120 °C/W) for board-level thermal design validation.
Technical Context
The P4SMA440AHE3_A/H operates as a clamping-type TVS diode, leveraging an avalanche breakdown mechanism to limit transient voltages above its VBR threshold. Its glass-passivated junction ensures stable reverse leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), critical for suppressing ESD and inductive switching spikes.
Rated for 150 °C maximum junction temperature and compliant with J-STD-020 MSL Level 1 (peak reflow 260 °C), it supports automated SMT assembly. The device delivers 400 W peak pulse power under 10/1000 µs waveform conditions when mounted on 5.0 mm × 5.0 mm copper pads - derating applies above 25 °C ambient per Fig. 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 376 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 400 V nominal systems. |
| VBR (Breakdown Voltage) | 418–462 V at 1.0 mA - Voltage range at which avalanche conduction initiates; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 602 V at IPPM = 0.5 A - Maximum voltage seen by protected circuit during full-rated surge; determines downstream component voltage stress. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - Energy-handling capability for single-event surges; validates robustness against ISO 7637-2 Pulse 1/2a/5a in automotive applications. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance; informs minimum PCB copper area (0.2" × 0.2") required for thermal reliability at rated power. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronic modules requiring extended temperature cycling, humidity resistance, and mechanical shock endurance. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side of protected line; defines directionality for unidirectional clamping. |
| Cathode | Clamping output / Surge current sink | Connected to higher-potential side (e.g., VIN); conducts surge current to ground during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables protection against high-energy transients like load dump (ISO 16750-2) without derating in standard layouts. |
| AEC-Q101 qualified | Validates reliability for automotive under-hood and powertrain applications where temperature, vibration, and lifetime are critical. |
| Glass passivated junction | Ensures stable leakage current (<1 µA at VWM) and long-term parameter stability across 150 °C operation. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without moisture-induced popcorning, eliminating pre-bake requirements in production. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD >15 kV), improving system immunity. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial DC Power Input Stage |
|---|---|
Use Scenario: Protection of 12 V/24 V supply inputs against load dump pulses (up to 120 V for 400 ms) and alternator transients in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and LDO/regulator input. Use Value: Clamps transients to ≤602 V while sustaining 400 W surge energy, preventing regulator latch-up or MOSFET gate oxide failure. |
Use Scenario: Safeguarding 400 V DC bus inputs in industrial motor drives from switching surges and lightning-induced ring waves. IC Role / Device Role / Timing Role: Primary overvoltage clamp on rectified AC input prior to bulk capacitor and PFC stage. Use Value: Withstands repetitive 10/1000 µs surges up to 0.01% duty cycle, maintaining <1 µA leakage at 376 V for low standby loss. |
| Telecom Base Station Power Supply | Onboard Charger (OBC) DC Link |
Use Scenario: Secondary surge suppression on -48 V telecom power distribution boards exposed to induced lightning surges. IC Role / Device Role / Timing Role: Standoff-rated TVS in parallel with DC/DC converter input to limit voltage excursions during surge testing (IEC 61000-4-5). Use Value: 602 V clamping voltage ensures downstream converters remain within absolute maximum ratings during 2 kV/1 kA surge events. |
Use Scenario: Transient protection on high-voltage DC link (350–450 V) of electric vehicle onboard chargers during grid switching events. IC Role / Device Role / Timing Role: Unidirectional TVS connected between DC+ and chassis ground to shunt common-mode surges. Use Value: AEC-Q101 qualification guarantees performance stability across -40 °C to +150 °C ambient, matching OBC thermal profiles. |
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/VBR/VC specs but SMB (DO-214AA) package; 10% larger footprint and 10% higher RθJA (130 °C/W). | Less suitable for ultra-dense automotive PCBs; requires larger pad layout for equivalent thermal performance. | Select when existing layout uses SMB footprint or when higher surge margin (600 W PPPM) is needed at lower voltage grades. |
| 1.5KE440A | Through-hole TO-204AA (DO-41); 1.5 kW PPPM rating but 5× larger size and no AEC-Q101 qualification. | Not viable for SMT production or automotive qualification; limited to prototyping or legacy through-hole designs. | Choose only for manual assembly or cost-sensitive non-automotive applications where board space and qualification are not constraints. |
Compared with SMBJ440A and 1.5KE440A, the P4SMA440AHE3_A/H offers the smallest footprint among 440 V-class TVS diodes with automotive qualification, enabling compact, high-reliability surge protection without layout redesign or thermal derating penalties.
Availability
P4SMA440AHE3_A/H is available at Aetrix Electronics and suitable for automotive engine control units, industrial DC power supplies, telecom base station power distribution, and EV onboard charger designs requiring stable component supply with AEC-Q101 compliance and traceable sourcing.
Supply support for P4SMA440AHE3_A/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, rectifiers, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The P4SMA series targets high-energy transient suppression in space-constrained, thermally demanding environments - engineered specifically for automotive, industrial, and telecom applications requiring AEC-Q101 validation and robust 10/1000 µs surge handling.
FAQ
What is the maximum clamping voltage of the P4SMA440AHE3_A/H under rated surge conditions?
The P4SMA440AHE3_A/H has a maximum clamping voltage (VC) of 602 V at 0.5 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per Fig. 1 and Table on page 2 of the Vishay datasheet 88367, and defines the upper voltage limit imposed on protected circuits during full-rated transient events. Exceeding this current reduces clamping effectiveness and risks thermal runaway.
Is the P4SMA440AHE3_A/H suitable for automotive applications?
Yes, the P4SMA440AHE3_A/H is AEC-Q101 qualified, as confirmed in the "MECHANICAL DATA" section and ordering table footnote (1) of Vishay document 88367. Its qualification covers temperature cycling, humidity testing, and mechanical shock - making it appropriate for engine control units, battery management systems, and other automotive modules operating from -40 °C to +150 °C junction temperature.
What does the "HE3_A/H" suffix indicate in P4SMA440AHE3_A/H?
The "HE3" denotes RoHS-compliant and AEC-Q101 qualified construction; "A" indicates revision level A for the P4SMA440A variant; "H" specifies 7-inch tape-and-reel packaging with 1800 units per reel. This full suffix confirms the part meets automotive reliability standards and is supplied in SMT-ready format compatible with high-speed pick-and-place equipment.
How does the thermal resistance of the P4SMA440AHE3_A/H affect PCB layout?
The P4SMA440AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W, measured on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under 400 W surge loads, designers must allocate ≥25 mm² of 2-oz copper per pad and avoid thermal isolation - insufficient copper increases RθJA and risks permanent parametric shift after repeated surges.
Can the P4SMA440AHE3_A/H be used in bidirectional configurations?
No, the P4SMA440AHE3_A/H is a unidirectional TVS diode, as indicated by its "A" suffix (vs. "CA" for bidirectional). Its cathode band marking and asymmetric I-V curve prevent effective clamping of negative-going transients. For bidirectional protection at similar voltage levels, use P4SMA440CAHE3_A/H - which has identical VWM/VBR/VC but symmetrical breakdown in both polarities.
P4SMA440AHE3_A/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:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA440AHE3_A/H FAQ
1.How can I place an order for P4SMA440AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA440AHE3_A/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 P4SMA440AHE3_A/H reliable?
The price and inventory of P4SMA440AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA440AHE3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA440AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA440AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA440AHE3_A/H?
P4SMA440AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA440AHE3_A/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 P4SMA440AHE3_A/H?
For technical support, including P4SMA440AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA440AHE3_A/H requirements.
6.How does Aetrix verify that P4SMA440AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA440AHE3_A/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 P4SMA440AHE3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA440AHE3_A/H?
All P4SMA440AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA440AHE3_A/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 P4SMA440AHE3_A/H part is unused and in its original packaging.
Return procedure for P4SMA440AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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