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Vishay General Semiconductor - Diodes Division P4SMA440A-E3/5A
- Part No.:
- P4SMA440A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA440A-E3/5A.pdf
- Description:
- TVS DIODE 376VWM 602VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,111
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Product details
Overview
P4SMA440A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-voltage surge protection in power rails and signal lines. It features a 440 V standoff voltage (VWM), 418–462 V breakdown voltage (VBR) at 1 mA, 602 V maximum clamping voltage (VC) at 0.5 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting industrial power supplies and telecom rectifier stages against lightning-induced transients.
For engineers reviewing the P4SMA440A-E3/5A datasheet, P4SMA440A-E3/5A pinout, P4SMA440A-E3/5A application, or P4SMA440A-E3/5A equivalent, key selection criteria include its unidirectional polarity, SMA (DO-214AC) package, 150 °C max junction temperature, low leakage (<1 µA at VWM), and AEC-Q101 qualification status for automotive-grade reliability in harsh environments.
Technical Context
The P4SMA440A-E3/5A operates as a clamping-type TVS diode that enters avalanche conduction above its specified breakdown voltage to divert transient energy away from protected circuitry. Its glass-passivated junction ensures stable electrical characteristics and long-term reliability under repetitive surge stress.
It delivers 400 W peak pulse power (10/1000 µs) with a clamping ratio of ~1.45 (VC/VBR min), exhibits <1 µA reverse leakage at 376 V, and maintains thermal resistance of 120 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads - enabling robust transient suppression without active thermal management in most board-level deployments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 376 V - maximum continuous reverse operating voltage before significant leakage begins; defines safe DC/AC rail margin for protection design |
| VBR (Breakdown Voltage) | 418–462 V at 1 mA - precise voltage threshold at which avalanche conduction initiates; ensures predictable clamping onset |
| VC (Clamping Voltage) | 602 V at IPPM = 0.5 A - maximum voltage seen by protected circuit during worst-case transient; critical for downstream component voltage rating |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - energy-handling capacity for standardized lightning/surge waveforms; supports IEC 61000-4-5 Level 4 compliance |
| ID (Reverse Leakage) | <1 µA at VWM - negligible standby power loss and minimal impact on high-impedance sensing or bias networks |
| TJ max | 150 °C - enables operation in under-hood automotive, industrial motor drives, and outdoor telecom enclosures without derating |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height; compatible with automated pick-and-place |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL level 1 (260 °C reflow peak), RoHS-compliant (E3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts avalanche current to ground during overvoltage events |
| Anode | Reference / return path | Typically tied to system ground or low-impedance return plane; completes clamping current path |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Supports high-energy surge immunity per IEC 61000-4-5 without external heat sinking |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability across temperature and lifetime |
| AEC-Q101 qualified (P4SMA440A variant with B revision) | Validated for automotive power electronics including battery management and DC-DC converters |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD, inductive switching) |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; reduces manufacturing complexity and cost |
Applications
| Industrial Power Supply Protection | Telecom Rectifier Stage Clamping |
|---|---|
Use Scenario: Protecting 400 V DC output rails in switch-mode power supplies against load dump and lightning surges. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between output rail and chassis ground. Use Value: Limits transient voltage to ≤602 V, preventing damage to downstream MOSFETs and controllers rated for 650 V. |
Use Scenario: Safeguarding AC/DC rectifier outputs in base station power systems exposed to induced surges on long cable runs. IC Role / Device Role / Timing Role: High-voltage TVS mounted directly at rectifier output terminals. Use Value: Absorbs 400 W pulses without degradation, maintaining system uptime in outdoor telecom infrastructure. |
| Automotive Battery Management Input | High-Voltage Sensor Signal Line Protection |
Use Scenario: Guarding BMS front-end inputs connected to 400 V traction battery packs during fault conditions. IC Role / Device Role / Timing Role: Primary overvoltage clamp on HV sense and communication lines. Use Value: AEC-Q101 qualification ensures reliability under thermal cycling and vibration; clamps within nanoseconds. |
Use Scenario: Shielding isolated analog sensor interfaces (e.g., current shunt monitors) in EV charging stations. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS on differential signal paths upstream of isolation barriers. Use Value: Prevents latch-up or damage to precision amplifiers while preserving signal integrity via minimal capacitance impact. |
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 - 30 % larger footprint, higher thermal mass | Better suited for manual repair or lower-density layouts where space permits larger pad area | Select when board layout allows larger package and higher thermal inertia is beneficial for repetitive surge duty |
| SMCJ440A | Same electrical specs but SMC (DO-214AB) package - 2× footprint area, 500 W PPPM rating | Targeted at higher-reliability industrial systems requiring extended surge endurance beyond 400 W | Choose when system-level testing demands >400 W margin or legacy SMC footprints are fixed |
Compared with P4SMA440A-E3/5A, SMBJ440A offers identical clamping performance in a physically larger package for easier handling and better thermal dissipation, while SMCJ440A provides higher pulse power headroom and mechanical robustness - both require PCB layout changes due to different outlines and pad dimensions.
Availability
P4SMA440A-E3/5A is available at Aetrix Electronics and suitable for industrial power supplies, telecom rectifier modules, and automotive battery management systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA440A-E3/5A 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is engineered for high-voltage transient suppression in demanding environments - targeting automotive, industrial, and telecom applications where consistent clamping behavior and AEC-Q101 validation are mandatory.
FAQ
What is the maximum clamping voltage of the P4SMA440A-E3/5A under peak pulse conditions?
The P4SMA440A-E3/5A 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 standard test conditions and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring compatibility with 650 V-rated downstream components in the P4SMA440A-E3/5A application chain.
Is the P4SMA440A-E3/5A RoHS-compliant and halogen-free?
Yes, the P4SMA440A-E3/5A carries the "E3" suffix, indicating it is RoHS-compliant and meets commercial-grade environmental requirements. It is not halogen-free; for halogen-free compliance, the "M3" suffix variant (e.g., P4SMA440A-M3/5A) must be selected - both share identical electrical specifications and SMA packaging, but differ in material composition per Vishay's categorization in document 99912.
Does the P4SMA440A-E3/5A meet AEC-Q101 qualification standards?
The base P4SMA440A-E3/5A is not AEC-Q101 qualified; however, the P4SMA440AHE3_B variant (with "HE3" and "B" revision suffix) is explicitly AEC-Q101 qualified per the datasheet note on page 3. For automotive applications requiring qualification, designers must specify the HE3_B version - the P4SMA440A-E3/5A itself remains commercial-grade and suitable for industrial and telecom use.
What is the thermal resistance of the P4SMA440A-E3/5A in standard mounting conditions?
The P4SMA440A-E3/5A 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, as defined in the Vishay datasheet. This value assumes no additional heatsinking and guides thermal design for continuous power dissipation up to 3.3 W - essential for validating safe operation in enclosed or high-ambient-temperature P4SMA440A-E3/5A deployments.
How does the P4SMA440A-E3/5A compare to bidirectional TVS diodes like P4SMA440CA?
The P4SMA440A-E3/5A is unidirectional and intended for DC rail protection with polarity-sensitive placement (cathode toward protected line), whereas P4SMA440CA is bidirectional and symmetric - suitable for AC lines or differential signals. Their VBR and VC values differ: P4SMA440CA has lower VBR (418–462 V) but same VC (602 V); however, bidirectional variants above 185 V VWM are not offered, so P4SMA440CA does not exist - only unidirectional P4SMA440A variants are available per the datasheet table.
P4SMA440A-E3/5A 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:
- 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-E3/5A FAQ
1.How can I place an order for P4SMA440A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA440A-E3/5A 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-E3/5A reliable?
The price and inventory of P4SMA440A-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA440A-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA440A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA440A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA440A-E3/5A?
P4SMA440A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA440A-E3/5A 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-E3/5A?
For technical support, including P4SMA440A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA440A-E3/5A requirements.
6.How does Aetrix verify that P4SMA440A-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA440A-E3/5A 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-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA440A-E3/5A?
All P4SMA440A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA440A-E3/5A, 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-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA440A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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