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Vishay General Semiconductor - Diodes Division 1.5SMC400A-E3/57T
- Part No.:
- 1.5SMC400A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC400A-E3/57T.pdf
- Description:
- TVS DIODE 342VWM 548VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:9,760
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Product details
Overview
1.5SMC400A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 400 V standoff voltage (VWM), 459 V minimum breakdown voltage (VBR), 1500 W peak pulse power (10/1000 µs), and clamps transients to ≤548 V at 2.7 A peak pulse current - deployed in industrial motor drives, telecom power supplies, and automotive ECUs.
For engineers reviewing the 1.5SMC400A-E3/57T datasheet, 1.5SMC400A-E3/57T pinout, 1.5SMC400A-E3/57T application, or 1.5SMC400A-E3/57T equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package thermal performance, clamping voltage margin vs. protected IC VDS(max), and AEC-Q101 qualification status for automotive use cases.
Technical Context
This TVS operates as a voltage-clamped crowbar device triggered by reverse-biased avalanche breakdown above VBR. Its glass-passivated junction ensures stable leakage (<1 µA at 342 V) and fast response (<1.0 ns), enabling protection against ESD (IEC 61000-4-2), lightning-induced surges (IEC 61000-4-5), and inductive switching transients.
The 1.5SMC400A-E3/57T is rated for 150 °C maximum junction temperature, with thermal resistance RθJA = 75 °C/W (on 8.0 mm × 8.0 mm copper pads) and RθJL = 15 °C/W. It meets J-STD-020 MSL Level 1 and is RoHS-compliant (E3 suffix), but not AEC-Q101 qualified - the HE3/HM3 variants are required for automotive-grade compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 342 V - maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected circuit DC rail stability |
| VBR (min) | 380 V - guaranteed avalanche initiation threshold at 1 mA test current; defines minimum overvoltage trip point |
| VC @ IPPM | 548 V - clamped voltage at 2.7 A peak pulse current (10/1000 µs); determines worst-case stress on downstream components |
| PPPM | 1500 W - peak transient power handling capability; enables robust protection against 10/1000 µs surges per IEC 61000-4-5 |
| IPPM | 2.7 A - maximum non-repetitive surge current it can shunt without failure; used to size upstream fusing or current limiting |
| TJ(max) | +150 °C - maximum junction temperature; supports operation in under-hood automotive or high-ambient industrial environments |
| RθJA | 75 °C/W - thermal resistance to ambient on standard 8 mm × 8 mm copper pads; informs PCB copper area requirements for thermal management |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with matte tin-plated leads. Cathode indicated by a band on one end; anode is unmarked. Meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased avalanche terminal | Connected to protected line; conducts during overvoltage events to clamp voltage to VC |
| Anode (unmarked end) | Reference/ground return path | Typically tied to system ground or lower-potential rail; completes current path during clamping |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-ground) in properly designed layouts |
| Glass-passivated junction | Ensures stable VBR tolerance (±5 %), low leakage (<1 µA), and long-term reliability under thermal cycling |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive 400 V-rated MOSFETs |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with automated placement and lead-free assembly (260 °C peak) |
| RoHS-compliant (E3 suffix) | Fulfills EU RoHS Directive 2011/65/EU and China RoHS; no exemptions required for lead, cadmium, or halogens |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of 400 V DC bus inputs against inductive kickback from IGBT gate drivers and contactor switching. IC Role / Device Role: Unidirectional TVS placed between DC+ and chassis ground to clamp transients exceeding 342 V. Use Value: Limits voltage stress on 600 V IGBTs to ≤548 V, preserving safe operating area and preventing cumulative degradation. |
Use Scenario: Input-stage surge suppression on -48 V or +54 V telecom rectifier outputs exposed to lightning-induced surges. IC Role / Device Role: Standoff-rated TVS connected across output rails to absorb 10/1000 µs surges up to 1500 W. Use Value: Maintains regulated output integrity during 2 kV common-mode surges per GR-1089-CORE, avoiding brownouts or latch-up. |
| Automotive Body Control Modules | Renewable Energy Inverters |
Use Scenario: Protection of LIN/CAN transceiver power rails in BCMs subjected to load dump (ISO 7637-2 Pulse 5a). IC Role / Device Role: High-VWM TVS on 12 V supply input to suppress 35 V–40 V transients lasting up to 400 ms. Use Value: Clamps sustained overvoltages below 548 V while surviving 1500 W pulses, extending transceiver lifetime beyond OEM requirements. |
Use Scenario: DC-link overvoltage suppression in solar string inverters where PV array open-circuit voltage reaches 400 V. IC Role / Device Role: Unidirectional TVS on DC+ to ground to protect IGBT modules during grid fault recovery. Use Value: Provides fail-safe clamping at 342 V standoff, ensuring compliance with UL 1741 SA Category III surge testing (6 kV line-to-ground). |
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 | Same VWM (342 V) and VC (548 V), but lower PPPM = 600 W; SMB package (DO-214AA), smaller footprint and thermal mass | Lower energy handling limits use to sub-2 kV IEC 61000-4-5 applications; unsuitable for telecom primary-side or industrial drive bus protection | Select when board space is constrained and surge threat level is ≤Level 3; verify thermal derating on small pads |
| 1.5KE400A | Through-hole TO-204AE (DO-41); identical electrical specs (VWM, VBR, VC, PPPM) but higher RθJA (~100 °C/W) and no MSL rating | Requires wave soldering or hand assembly; incompatible with automated SMT lines and high-reliability reflow processes | Choose only for legacy through-hole designs or prototyping where SMT infrastructure is unavailable |
Compared with SMBJ400A and 1.5KE400A, the 1.5SMC400A-E3/57T delivers full 1500 W surge capacity in an MSL Level 1 SMT package - making it the preferred choice for production-grade industrial and telecom systems requiring automated assembly and high-energy transient resilience.
Availability
1.5SMC400A-E3/57T is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and renewable energy inverters requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for 1.5SMC400A-E3/57T 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, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific optimization.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in harsh environments - targeting industrial automation, telecom infrastructure, and automotive subsystems where compact size, repeatable clamping, and surge survivability are critical.
FAQ
What is the standoff voltage (VWM) of the 1.5SMC400A-E3/57T?
The 1.5SMC400A-E3/57T has a maximum reverse standoff voltage (VWM) of 342 V. This value represents the highest continuous DC or RMS voltage the device can block without entering avalanche conduction. It is derived from the 400 V nominal rating with a -14.5 % tolerance, ensuring reliable operation below the clamping threshold in 400 V-class systems.
Is the 1.5SMC400A-E3/57T AEC-Q101 qualified?
No, the 1.5SMC400A-E3/57T is not AEC-Q101 qualified. The E3 suffix denotes RoHS-compliant commercial-grade construction. For automotive applications requiring AEC-Q101 qualification, Vishay offers the 1.5SMC400AHE3_B variant (with HE3 suffix and revision code B), which undergoes additional stress testing per the AEC standard.
What is the clamping voltage (VC) of the 1.5SMC400A-E3/57T at its rated peak pulse current?
The 1.5SMC400A-E3/57T clamps to a maximum of 548 V at its rated peak pulse current (IPPM) of 2.7 A, measured using the standardized 10/1000 µs double-exponential waveform. This VC value defines the upper voltage limit imposed on protected circuitry during a full-rated surge event.
What package type does the 1.5SMC400A-E3/57T use, and what are its key mechanical features?
The 1.5SMC400A-E3/57T uses the SMC (DO-214AB) surface-mount package: a low-profile, rectangular plastic case measuring 7.11 mm × 6.22 mm × 2.62 mm. Key features include matte tin-plated leads compliant with J-STD-002, UL 94 V-0 flammability rating, and a visible cathode band for polarity identification.
How does the 1.5SMC400A-E3/57T compare to bidirectional TVS diodes like 1.5SMC400CA?
The 1.5SMC400A-E3/57T is unidirectional and intended for DC line protection with defined polarity, whereas 1.5SMC400CA is bidirectional and suited for AC or differential-signal protection. The 1.5SMC400A-E3/57T exhibits lower leakage (<1 µA at VWM) and higher VBR symmetry tolerance than its bidirectional counterpart, making it preferable for asymmetric DC rail clamping.
1.5SMC400A-E3/57T 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:
- 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):
- 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-E3/57T FAQ
1.How can I place an order for 1.5SMC400A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC400A-E3/57T 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-E3/57T reliable?
The price and inventory of 1.5SMC400A-E3/57T 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-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC400A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC400A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC400A-E3/57T?
1.5SMC400A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC400A-E3/57T 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-E3/57T?
For technical support, including 1.5SMC400A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC400A-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC400A-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC400A-E3/57T 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-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC400A-E3/57T?
All 1.5SMC400A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC400A-E3/57T, 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-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC400A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC400A-E3/57T Tags
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Diodes Incorporated
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