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Vishay General Semiconductor - Diodes Division 1.5SMC400A-M3/57T
- Part No.:
- 1.5SMC400A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC400A-M3/57T.pdf
- Description:
- TVS DIODE 342VWM 548VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,971
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Product details
Overview
1.5SMC400A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 400 V standoff voltage (VWM), 459 V maximum breakdown voltage (VBR), and 1500 W peak pulse power (10/1000 μs). It provides robust overvoltage protection for high-voltage DC rails in industrial power supplies and telecom infrastructure.
For engineers reviewing the 1.5SMC400A-M3/57T datasheet, 1.5SMC400A-M3/57T pinout, 1.5SMC400A-M3/57T application, or 1.5SMC400A-M3/57T equivalent, key selection criteria include clamping voltage (548 V at IPPM), low leakage (<1.0 μA at VWM), AEC-Q101 qualification eligibility via HM3 suffix, halogen-free RoHS compliance, and MSL Level 1 moisture sensitivity rating.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, designed to shunt transient energy away from sensitive downstream circuitry during lightning-induced surges or inductive switching events. Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1.0 ns).
The 1.5SMC400A-M3/57T delivers 2.7 A peak pulse current (IPPM) at its 548 V clamping voltage under 10/1000 μs waveform conditions, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads), enabling reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 342 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 400 V nominal systems. |
| VBR (Breakdown Voltage) | 380–420 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on behavior under transients. |
| VC (Clamping Voltage) | 548 V at 2.7 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs surge; critical for MOSFET/IC voltage margining. |
| PPPM (Peak Pulse Power) | 1500 W - Energy-handling capability per IEEE C62.35 10/1000 μs waveform; supports repeated surge events at 0.01% duty cycle. |
| ID (Reverse Leakage) | <1.0 μA at 342 V - Minimal standby power loss and signal integrity impact in high-impedance sensing or bias networks. |
| TJ max | 150 °C - Maximum allowable junction temperature; enables use in enclosed, convection-limited industrial enclosures. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement; compatible with automated reflow assembly. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile 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 | Current entry terminal during forward conduction | Connected to system ground or low-side reference; must be routed with low-inductance path for effective surge shunting. |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line (e.g., 400 V DC bus); cathode band identifies this terminal on physical device. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-ground) without derating in standard PCB layouts. |
| Glass passivated chip junction | Ensures long-term stability of breakdown voltage and leakage performance across temperature and lifetime stress conditions. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements and eliminates corrosive halogen emissions during board rework or end-of-life processing. |
| MSL Level 1 (260 °C peak reflow) | Allows single-pass lead-free reflow without baking or special handling; reduces manufacturing complexity and cost. |
| AEC-Q101 qualification path (HM3 variant) | Supports automotive-grade reliability validation for high-voltage subsystems such as battery management or DC-DC converters. |
Applications
| Industrial Power Supply Protection | Telecom DC Feeder Line Protection |
|---|---|
|
Use Scenario: Protecting 380–400 V DC output rails in switch-mode power supplies against load dump and capacitor discharge transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between output rail and chassis ground to limit voltage excursions during fault conditions. Use Value: Clamps to 548 V at 2.7 A, preserving MOSFET and controller ICs rated for 600 V breakdown while maintaining >50 V design margin. |
Use Scenario: Safeguarding -48 V or +400 V telecom DC distribution lines from lightning-induced surges entering via outdoor cable runs. IC Role / Device Role / Timing Role: Primary overvoltage clamp on feed line input stage, coordinated with upstream gas discharge tubes (GDTs) for staged protection. Use Value: Fast <1 ns response captures initial surge edge; low 1.0 μA leakage avoids loading sensitive monitoring circuits on remote power feeds. |
| High-Voltage Motor Drive DC Link | Renewable Energy Inverter DC Bus |
|
Use Scenario: Suppressing commutation spikes on 400 V DC link capacitors in variable-frequency drives controlling HVAC or pump motors. IC Role / Device Role / Timing Role: Parallel-mounted TVS across DC bus terminals to absorb regenerative energy spikes during IGBT turn-off. Use Value: 1500 W rating handles repetitive 10/1000 μs transients common in PWM-driven inductive loads without thermal runaway. |
Use Scenario: Protecting photovoltaic string inverters' 400 V DC input stage from grid-switching transients and nearby lightning coupling. IC Role / Device Role / Timing Role: First-line transient suppressor on PV input terminals, preceding fuse and EMI filter stages. Use Value: 342 V VWM allows full utilization of 400 V-rated electrolytic capacitors while providing 106 V headroom to VC = 548 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ400A-M3/57T | Lower PPPM (600 W), same VWM/VBR range, SMB package (smaller footprint, higher RθJA = 100 °C/W) | Not suitable for 1500 W surge events; limited to lower-energy transients in space-constrained designs | Select only when board area is critical and surge threat level is ≤IEC 61000-4-5 Level 2. |
| 1.5KE400A-T | Through-hole DO-201 package, identical electrical specs but higher mounting inductance and no MSL rating | Requires wave soldering; incompatible with fully SMT production; less reliable for high-frequency surge capture | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMBJ400A-M3/57T and 1.5KE400A-T, the 1.5SMC400A-M3/57T uniquely balances 1500 W surge capacity, SMC surface-mount compatibility, MSL Level 1 process readiness, and halogen-free compliance-making it optimal for high-reliability industrial and telecom SMT production.
Availability
1.5SMC400A-M3/57T is available at Aetrix Electronics and suitable for industrial power supplies, telecom DC feeder protection, motor drive DC links, and renewable energy inverter DC buses requiring stable component supply, long-term lifecycle support, and halogen-free compliance.
Supply support for 1.5SMC400A-M3/57T 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 1.5SMC Series was developed for high-power, surface-mount transient suppression in harsh environments-including industrial, telecom, and automotive systems-where consistent clamping performance and assembly compatibility are essential.
FAQ
What is the clamping voltage of the 1.5SMC400A-M3/57T under standard test conditions?
The 1.5SMC400A-M3/57T has a maximum clamping voltage (VC) of 548 V when subjected to its rated peak pulse current (IPPM) of 2.7 A using the 10/1000 μs waveform. This value is measured at TJ = 25 °C with specified PCB pad layout (0.31" × 0.31" copper), and represents the upper voltage limit imposed on protected circuitry during surge events.
Is the 1.5SMC400A-M3/57T suitable for automotive applications?
The 1.5SMC400A-M3/57T itself is commercial-grade; however, the HM3 variant (e.g., 1.5SMC400AHM3_B/H) is AEC-Q101 qualified for automotive use. The 1.5SMC400A-M3/57T shares identical electrical and thermal specifications but lacks formal automotive qualification-so it may be used in non-safety-critical automotive subsystems pending internal validation.
What does the "M3" suffix indicate in 1.5SMC400A-M3/57T?
The "M3" suffix in 1.5SMC400A-M3/57T denotes halogen-free, RoHS-compliant construction meeting IPC-1752A material declaration standards. It also confirms compliance with JESD 201 Class 2 whisker resistance and MSL Level 1 rating for lead-free reflow, distinguishing it from E3 (RoHS, non-halogen-free) and HE3/HM3 (AEC-Q101 qualified) variants.
How does the 1.5SMC400A-M3/57T compare to bidirectional TVS diodes like 1.5SMC400CA?
The 1.5SMC400A-M3/57T is unidirectional and intended for DC line protection with defined polarity (cathode band), whereas 1.5SMC400CA is bidirectional and suited for AC or floating signal lines. Their VWM (342 V vs. 342 V), VBR (380–420 V vs. 380–420 V), and VC (548 V vs. 548 V) match closely, but the unidirectional version offers lower leakage and better DC blocking integrity.
What is the recommended PCB layout for optimal thermal and electrical performance of the 1.5SMC400A-M3/57T?
Vishay specifies minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for the 1.5SMC400A-M3/57T to achieve rated 1500 W pulse power and thermal resistance (RθJA = 75 °C/W). Traces should be short and wide, with direct connection to internal ground/power planes; avoid thermal reliefs on pads to maximize heat dissipation during surge events.
1.5SMC400A-M3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 2.7A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
1.5SMC400A-M3/57T FAQ
1.How can I place an order for 1.5SMC400A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC400A-M3/57T 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 1.5SMC400A-M3/57T reliable?
The price and inventory of 1.5SMC400A-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC400A-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC400A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC400A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC400A-M3/57T?
1.5SMC400A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC400A-M3/57T 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 1.5SMC400A-M3/57T?
For technical support, including 1.5SMC400A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC400A-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC400A-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC400A-M3/57T 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 1.5SMC400A-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC400A-M3/57T?
All 1.5SMC400A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC400A-M3/57T, 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 1.5SMC400A-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC400A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC400A-M3/57T Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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