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Vishay General Semiconductor - Diodes Division 1.5SMC440A-E3/57T
- Part No.:
- 1.5SMC440A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC440A-E3/57T.pdf
- Description:
- TVS DIODE 376VWM 602VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,868
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Product details
Overview
1.5SMC440A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 440 V standoff voltage (VWM), 462 V maximum breakdown voltage (VBR), 1500 W peak pulse power rating (10/1000 μs), and clamps transients to 602 V at 2.5 A peak pulse current - deployed in automotive power supply rails, industrial motor drive I/O protection, and telecom DC feed circuits.
For engineers reviewing the 1.5SMC440A-E3/57T datasheet, 1.5SMC440A-E3/57T pinout, 1.5SMC440A-E3/57T application, or 1.5SMC440A-E3/57T equivalent, key selection criteria include its 440 V working voltage, unidirectional polarity, SMC (DO-214AB) package thermal performance (RθJA = 75 °C/W), and AEC-Q101 qualification eligibility via HE3/HM3 variants.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when reverse voltage exceeds its VBR (418–462 V), limiting transient energy by diverting surge current away from protected circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 μA at VWM).
The 1.5SMC440A-E3/57T is rated for 1500 W peak pulse power under standardized 10/1000 μs waveform conditions, with derating above 25 °C ambient per Fig. 2, and supports repetitive surge duty cycles up to 0.01 %. Its 150 °C maximum junction temperature and MSL Level 1 moisture sensitivity support reflow-compatible assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 440 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC line operating margin. |
| VBR (Breakdown Voltage) | 418–462 V at 1 mA - Voltage range at which avalanche conduction initiates; tight tolerance enables precise overvoltage threshold setting. |
| VC (Clamping Voltage) | 602 V at IPPM = 2.5 A - Peak voltage seen by protected circuit during full-rated surge; determines downstream component voltage stress. |
| PPPM (Peak Pulse Power) | 1500 W (10/1000 μs) - Energy-handling capacity for lightning/inductive-switching transients; validated on 8.0 mm × 8.0 mm copper pads. |
| ID (Reverse Leakage) | <1 μA at 440 V - Minimal standby power loss and signal integrity impact in high-impedance sensing or bias networks. |
| TJ max. | 150 °C - Maximum allowable junction temperature; sets thermal design limits for PCB copper area and airflow requirements. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance; used to calculate temperature rise under sustained power dissipation (e.g., 6.5 W PD). |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking; unidirectional polarity only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential side of protected line. | Provides path for surge current to ground when cathode is held at higher potential; must be routed with low-inductance trace. |
| Cathode | Current exit terminal in forward bias; marked with band; connected to higher-potential side or VCC rail. | Serves as reference node for clamping action; ties directly to protected IC power pin or bus rail to minimize voltage overshoot. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without derating in standard layouts. |
| Glass-passivated junction | Ensures long-term stability of VBR and low parametric drift across temperature and lifetime stress conditions. |
| MSL Level 1 (260 °C peak) | Supports single-reflow assembly without moisture-related popcorning; eliminates pre-bake requirement for production lines. |
| AEC-Q101 qualification option | Available in HE3/HM3 variants for automotive power modules requiring validated reliability in harsh environments. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD or switching noise), improving system immunity. |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs and ADAS sensors from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and LDO input to clamp spikes up to 602 V. Use Value: Prevents latch-up or permanent damage to voltage regulators and microcontrollers during ISO 7637-2 Pulse 5a events. |
Use Scenario: Shielding PLC analog input channels from inductive kickback when controlling solenoids or contactors. IC Role / Device Role / Timing Role: TVS mounted at connector interface to shunt surge energy before it reaches precision op-amp front-end. Use Value: Maintains signal integrity and avoids ADC saturation or offset shift caused by sub-100 ns transients. |
| Telecom DC Feed Protection | Renewable Energy Inverter DC Link |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC feed lines. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; this unidirectional part used on positive rail with grounded return. Use Value: Limits voltage excursion to ≤602 V during lightning-induced surges on outdoor cabling, preserving PHY ICs. |
Use Scenario: Clamping switching transients on 400–600 V DC link buses in solar inverters during IGBT commutation. IC Role / Device Role / Timing Role: Mounted across DC bus capacitors to absorb dV/dt spikes and reduce EMI filter stress. Use Value: Extends capacitor lifetime by reducing RMS ripple current and prevents overvoltage trips in gate drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ440A | Same VWM/VBR/VC specs but in smaller SMB (DO-214AA) package; 600 W PPPM rating vs. 1500 W. | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for load dump or high-power industrial surges. | Select SMBJ440A only when board space is constrained and surge threat level is ≤600 W. |
| 1.5KE440A | Through-hole TO-204AE (DO-201AE) package; identical electrical specs but higher RθJA (~50 °C/W) and no MSL rating. | Not compatible with automated SMT lines; requires wave soldering; less suitable for high-volume automotive production. | Choose 1.5KE440A only for prototyping, legacy through-hole designs, or where thermal mass of leadframe suffices. |
Compared with SMBJ440A and 1.5KE440A, the 1.5SMC440A-E3/57T delivers superior surge handling (1500 W), SMT process compatibility, and MSL Level 1 reliability - making it optimal for high-reliability, volume-manufactured 440 V rail protection where both power density and assembly yield matter.
Availability
1.5SMC440A-E3/57T is available at Aetrix Electronics and suitable for automotive power modules, industrial motor control systems, and telecom DC feed circuits requiring stable component supply, RoHS-compliant sourcing, and consistent tape-and-reel delivery.
Supply support for 1.5SMC440A-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in demanding environments - targeting automotive, industrial, and telecom applications where compact size, repeatable clamping, and AEC-Q101 readiness are critical.
FAQ
What is the maximum clamping voltage of the 1.5SMC440A-E3/57T under full-rated surge conditions?
The 1.5SMC440A-E3/57T clamps to a maximum of 602 V when subjected to its rated peak pulse current of 2.5 A (10/1000 μs waveform). This value is measured per standard test conditions on 8.0 mm × 8.0 mm copper pads and defines the worst-case voltage imposed on downstream circuitry during surge events.
Is the 1.5SMC440A-E3/57T suitable for automotive applications requiring AEC-Q101 qualification?
The base 1.5SMC440A-E3/57T is RoHS-compliant and commercial-grade; however, Vishay offers AEC-Q101-qualified versions under ordering codes like 1.5SMC440AHE3_B/H. The 1.5SMC440A-E3/57T itself is not AEC-Q101 qualified, but serves as the electrical and mechanical baseline for those qualified variants.
What is the thermal resistance and how does it affect layout for the 1.5SMC440A-E3/57T?
The 1.5SMC440A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W. To maintain safe operation under sustained power dissipation (e.g., 6.5 W), PCB layout must provide adequate copper area - Vishay specifies 0.31" × 0.31" (8.0 mm × 8.0 mm) pads per terminal as the minimum for rated PPPM performance.
Does the 1.5SMC440A-E3/57T have bidirectional capability?
No, the 1.5SMC440A-E3/57T is a unidirectional TVS diode, indicated by the "A" suffix. Bidirectional variants use the "CA" suffix (e.g., 1.5SMC440CA). Polarity is marked by a cathode band; incorrect orientation will prevent proper clamping during reverse transients.
What is the reverse leakage current specification for the 1.5SMC440A-E3/57T at its rated standoff voltage?
At VWM = 440 V and TA = 25 °C, the 1.5SMC440A-E3/57T exhibits a maximum reverse leakage current (ID) of 1 μA. This ultra-low leakage ensures minimal power loss and negligible loading on high-impedance circuits such as sensor bias networks or precision reference paths.
1.5SMC440A-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):
- 376V
- Voltage - Breakdown (Min):
- 418V
- Voltage - Clamping (Max) @ Ipp:
- 602V
- Current - Peak Pulse (10/1000µs):
- 2.5A
- 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)
1.5SMC440A-E3/57T FAQ
1.How can I place an order for 1.5SMC440A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC440A-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 1.5SMC440A-E3/57T reliable?
The price and inventory of 1.5SMC440A-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 1.5SMC440A-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC440A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC440A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC440A-E3/57T?
1.5SMC440A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC440A-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 1.5SMC440A-E3/57T?
For technical support, including 1.5SMC440A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC440A-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC440A-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC440A-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 1.5SMC440A-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC440A-E3/57T?
All 1.5SMC440A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC440A-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 1.5SMC440A-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC440A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC440A-E3/57T Tags
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