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Vishay General Semiconductor - Diodes Division P4SMA400A-E3/61
- Part No.:
- P4SMA400A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA400A-E3/61.pdf
- Description:
- TVS DIODE 342VWM 548VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,494
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Product details
Overview
P4SMA400A-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 400 W peak pulse power (10/1000 µs), 342 V standoff voltage (VWM), and 548 V clamping voltage (VC) at 0.55 A peak pulse current. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning surges in industrial power supplies and telecom interfaces.
For engineers reviewing the P4SMA400A-E3/61 datasheet, P4SMA400A-E3/61 pinout, P4SMA400A-E3/61 application, or P4SMA400A-E3/61 equivalent, this device delivers verified clamping performance, AEC-Q101 qualification (B-grade), RoHS-compliant matte tin terminations, and MSL Level 1 moisture sensitivity - critical for automotive-grade surge protection design-in and high-reliability board-level ESD/transient immunity validation.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: when reverse voltage exceeds its 380–420 V breakdown range (VBR at 1.0 mA), it avalanches to limit transient energy across protected circuit nodes. Its low incremental surge resistance ensures minimal voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a).
Thermal design relies on RθJA = 120 °C/W (typ.) and RθJL = 30 °C/W (typ.), requiring minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for full 400 W rating. The glass-passivated junction and J-STD-020-compliant lead finish support reflow compatibility up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 342 V - Maximum continuous reverse operating voltage before leakage exceeds 1.0 µA; defines upper DC bias limit for safe placement across protected lines. |
| VBR (min/max) | 380 V / 420 V at 1.0 mA - Confirmed avalanche onset range; ensures predictable turn-on within ±5 % tolerance under standardized test conditions. |
| VC @ IPPM | 548 V at 0.55 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream components during worst-case transient. |
| PPPM | 400 W - Peak pulse power handling capability; validated with 10/1000 µs waveform and derated above TA = 25 °C per Fig. 2. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports robustness against accidental polarity reversal events. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| Package | SMA (DO-214AC) - Surface-mount outline with cathode band marking; compatible with automated pick-and-place and standard reflow profiles (MSL Level 1). |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case with matte tin-plated leads, cathode indicated by a band on the body. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), lead pitch 2.54 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to lower-potential side of protected line; establishes reference for unidirectional clamping action. |
| Cathode | Clamping output / Surge current sink | Connected to higher-potential side (e.g., VIN, signal line); conducts avalanche current to ground or return path during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables protection against severe ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Combination Wave surges without derating. |
| Glass-passivated junction | Ensures stable VBR and low leakage (<1.0 µA at VWM) over temperature and lifetime, critical for long-term reliability in sealed enclosures. |
| AEC-Q101 qualified (B-grade) | Validated for automotive applications including engine control modules and body electronics where transient immunity must meet OEM requirements. |
| MSL Level 1, 260 °C peak reflow | Eliminates pre-baking requirement and supports single-pass assembly with standard lead-free reflow profiles. |
| UL Recognized (QVGQ2, E136766) | Meets UL 497B for telecom/data line protectors, simplifying safety certification for industrial gateways and PoE-powered devices. |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) Signal Lines |
|---|---|
Use Scenario: Protecting 400 V DC input rails in DIN-rail mounted PLC power supplies against inductive kickback from contactor coils and relay switching. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly across input terminals to clamp voltage spikes before they reach upstream rectifiers and bulk capacitors. Use Value: Limits transient overshoot to ≤548 V, preventing dielectric breakdown in 630 V-rated electrolytic capacitors and ensuring >100,000-cycle reliability under repetitive 400 V surges. |
Use Scenario: Safeguarding LIN bus and sensor analog inputs (e.g., ambient temperature, door position) in BCMs exposed to battery load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS connected between signal line and chassis ground, triggered only during positive-going transients exceeding 342 V. Use Value: Maintains signal integrity below 548 V clamping level while surviving AEC-Q101 stress tests (HTOL, TC, UHAST), enabling zero-field returns in Tier-1 production. |
| Telecom Central Office Line Card Protection | Renewable Energy Inverter DC Link Monitoring |
Use Scenario: Shielding Ethernet PHY interface and management MCU I/O pins on carrier-grade DSLAM line cards from lightning-induced surges on copper pairs. IC Role / Device Role / Timing Role: Primary protection device placed at connector entry point, coordinated with secondary GDT or polymer PTC for multi-stage suppression. Use Value: Responds in <1 ps to sub-nanosecond transients, limiting let-through energy to <10 mJ - sufficient to prevent latch-up in 3.3 V logic and PHY transceivers. |
Use Scenario: Guarding isolated voltage sense inputs monitoring 400 V DC link in solar string inverters during grid fault recovery and rapid MPPT transients. IC Role / Device Role / Timing Role: High-VWM TVS placed across differential sense resistor network to absorb common-mode spikes without affecting measurement accuracy. Use Value: Withstands repeated 400 W pulses at 0.01 % duty cycle, preserving ADC reference stability and avoiding false overvoltage trips during normal inverter switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ400A-E3/52 | Same VWM/VC specs but SMB (DO-214AA) package; 600 W PPPM, larger footprint (4.57 mm × 3.94 mm), higher IPPM (0.67 A). | Better suited for space-tolerant designs needing higher surge margin; not drop-in due to larger pad layout and 1.5 mm greater width. | Select when system-level testing requires ≥600 W surge headroom and PCB real estate permits larger outline. |
| 1.5KE400A | Through-hole DO-201AE package; identical electrical specs but 1.5 kW PPPM, higher thermal mass, no MSL rating. | Used in legacy industrial controls and repair scenarios where wave soldering remains standard; incompatible with SMT-only lines. | Choose for cost-sensitive, non-automated assembly or field-replaceable modules where rework accessibility outweighs density constraints. |
Compared with P4SMA400A-E3/61, SMBJ400A-E3/52 offers higher surge capacity in a slightly larger SMT package, while 1.5KE400A provides through-hole robustness and legacy compatibility - neither is pin-compatible, but both serve overlapping high-voltage transient protection roles with distinct mechanical and process trade-offs.
Availability
P4SMA400A-E3/61 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom line cards, and renewable energy inverters requiring stable component supply, AEC-Q101 qualification, and RoHS-compliant manufacturing.
Supply support for P4SMA400A-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, efficiency, and application-specific optimization.
The P4SMA Series targets high-voltage transient suppression in compact SMT formats, designed specifically for automotive, industrial, and telecom systems where space-constrained layouts demand robust, standardized TVS solutions with certified qualifications.
FAQ
What is the maximum clamping voltage of P4SMA400A-E3/61 under a 10/1000 µs surge?
The P4SMA400A-E3/61 has a maximum clamping voltage (VC) of 548 V at 0.55 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88367 and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. Engineers use this parameter to verify that downstream components remain within their absolute maximum ratings during surge conditions.
Is P4SMA400A-E3/61 suitable for automotive applications?
Yes, P4SMA400A-E3/61 is AEC-Q101 qualified (B-grade revision), making it suitable for automotive applications including body control modules, powertrain sensors, and infotainment power rails. Its construction features glass-passivated junctions, matte tin terminations compliant with J-STD-002, and MSL Level 1 rating - all validated per AEC-Q101 stress test requirements. The "B" suffix in ordering codes (e.g., P4SMA400AHM3_B/H) explicitly denotes this qualification tier.
What does the "-E3/61" suffix indicate in P4SMA400A-E3/61?
The "-E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads, while "/61" specifies packaging in 7-inch diameter plastic tape and reel containing 1800 units. This configuration meets JESD201 Class 2 whisker resistance and J-STD-020 reflow standards, supporting high-volume automated assembly. The base part P4SMA400A is unqualified; only variants with HE3/HM3 or E3/M3 suffixes carry defined compliance status.
How does P4SMA400A-E3/61 differ from bidirectional TVS diodes like P4SMA400CA?
P4SMA400A-E3/61 is unidirectional and functions only during positive voltage transients relative to its cathode, whereas P4SMA400CA is bidirectional and clamps symmetrically in both polarities. The unidirectional version offers tighter VBR tolerance (±5 %) and lower leakage at VWM, making it preferable for DC-biased lines like power inputs. Bidirectional types are used on AC-coupled or floating signal paths where polarity reversal is possible.
What thermal derating applies to P4SMA400A-E3/61 above 25 °C ambient?
P4SMA400A-E3/61 follows the derating curve in Figure 2 of datasheet 88367: its 400 W peak pulse power rating decreases linearly above TA = 25 °C, reaching ~240 W at 75 °C and ~120 W at 125 °C. This reflects junction-to-ambient thermal resistance (RθJA = 120 °C/W) and requires appropriate copper pad area (0.2" × 0.2") to maintain specified performance. Continuous power dissipation remains limited to 3.3 W regardless of ambient.
P4SMA400A-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):
- 342V
- Voltage - Breakdown (Min):
- 380V
- Voltage - Clamping (Max) @ Ipp:
- 548V
- Current - Peak Pulse (10/1000µs):
- 550mA
- 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)
P4SMA400A-E3/61 FAQ
1.How can I place an order for P4SMA400A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA400A-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 P4SMA400A-E3/61 reliable?
The price and inventory of P4SMA400A-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 P4SMA400A-E3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA400A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA400A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA400A-E3/61?
P4SMA400A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA400A-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 P4SMA400A-E3/61?
For technical support, including P4SMA400A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA400A-E3/61 requirements.
6.How does Aetrix verify that P4SMA400A-E3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA400A-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 P4SMA400A-E3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA400A-E3/61?
All P4SMA400A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA400A-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 P4SMA400A-E3/61 part is unused and in its original packaging.
Return procedure for P4SMA400A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA400A-E3/61 Tags
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