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Vishay General Semiconductor - Diodes Division 1.5SMC440A-M3/57T
- Part No.:
- 1.5SMC440A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC440A-M3/57T.pdf
- Description:
- TVS DIODE 376VWM 602VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,550
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Product details
Overview
1.5SMC440A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, designed for high-energy surge protection. It features a 440 V breakdown voltage (VBR = 418–462 V at IT = 1.0 mA), 376 V maximum clamping voltage (VC) at 2.5 A peak pulse current (IPPM), and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard power rails and signal lines in industrial motor drives and telecom infrastructure.
For engineers reviewing the 1.5SMC440A-M3/57T datasheet, 1.5SMC440A-M3/57T pinout, 1.5SMC440A-M3/57T application, or 1.5SMC440A-M3/57T equivalent, key selection criteria include standoff voltage (VWM = 376 V), clamping performance under repetitive surges, halogen-free RoHS compliance (M3 suffix), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its specified breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling consistent clamping during fast transients such as lightning-induced surges or inductive switching spikes.
The device is rated for 150 °C maximum junction temperature and derates linearly above 25 °C ambient per Fig. 2 of the datasheet. With RθJA = 75 °C/W and RθJL = 15 °C/W, thermal performance depends critically on PCB copper pad area - minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) per terminal is required to sustain full 1500 W pulse rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 418 V / 462 V at IT = 1.0 mA - defines precise avalanche onset range for reliable overvoltage triggering |
| VWM | 376 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 602 V at IPPM = 2.5 A (10/1000 µs) - clamping voltage seen by protected circuit during worst-case surge |
| PPPM | 1500 W - peak transient power dissipation capability under standardized surge waveform |
| IFSM | 200 A - single half-sine surge current rating (8.3 ms), critical for AC line input protection |
| Junction Temp | -65 °C to +150 °C - enables deployment in under-hood automotive or outdoor telecom enclosures |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with cathode band marking and 0.220"–0.246" body width |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band; polarity critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential side (e.g., ground or return path); must be routed with low-inductance trace in surge path |
| Cathode | Current exit point during reverse avalanche clamping | Connected to protected line (e.g., 48 V DC bus); band-marked end determines orientation during pick-and-place |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Sustains IEEE C62.41-compliant lightning surges without degradation when mounted on 8 mm × 8 mm copper pads |
| Glass-passivated junction | Ensures ±5% VBR tolerance and long-term stability under thermal cycling and humidity stress |
| Halogen-free & RoHS-compliant (M3) | Meets IPC-1752A material declaration requirements and supports environmentally regulated industrial OEM programs |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning or baking |
| AEC-Q101 qualified option | Available in HM3 variant (e.g., 1.5SMC440AHM3_B/H) for automotive powertrain and body electronics |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
|
Use Scenario: Protection of 48 V DC input stage against load dump and back-EMF spikes from brushed DC motors. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input terminals to clamp transients before they reach DC-DC controllers and gate drivers. Use Value: Limits voltage excursion to ≤602 V during 2.5 A surge, preventing latch-up or permanent damage to downstream Si MOSFETs rated at 650 V. |
Use Scenario: Surge suppression on -48 V telecom rectifier outputs exposed to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between output rail and chassis ground to shunt induced energy away from line cards. Use Value: Maintains system uptime by absorbing 1500 W pulses without failure, meeting Telcordia GR-1089-CORE immunity requirements. |
| Renewable Energy Inverters | Railway Signaling Systems |
|
Use Scenario: DC-link overvoltage protection in solar string inverters subject to rapid PV array disconnection events. IC Role / Device Role / Timing Role: Fast-response avalanche diode placed across DC-link capacitors to clamp voltage overshoot during fault clearing. Use Value: Clamps within <1 ns to protect IGBT modules rated at 1200 V, reducing need for oversized snubbers and lowering BOM cost. |
Use Scenario: Protection of 110 V DC signaling circuits in trackside equipment against EMI from passing trains and traction currents. IC Role / Device Role / Timing Role: High-VWM TVS installed at interface connectors to suppress coupled surges entering control logic boards. Use Value: Enables EN 50121-3-2 compliance with no additional filtering, simplifying certification for rolling stock subsystems. |
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 VBR range (418–462 V) but SMB package (DO-214AA); lower PPPM = 600 W | Limited to lower-energy surges; unsuitable for 1500 W lightning test waveforms | Select only if space-constrained layout and surge energy is ≤600 W |
| 1.5KE440A | Through-hole DO-201 package; identical electrical specs but incompatible with SMT assembly | Requires manual or wave soldering; not viable for high-volume automated production | Choose only for legacy repair or prototyping where reflow compatibility is not required |
Compared with SMBJ440A and 1.5KE440A, the 1.5SMC440A-M3/57T uniquely delivers 1500 W surge handling in an SMT-compatible SMC package with halogen-free compliance - making it the only choice for new industrial designs requiring both high-power clamping and RoHS/REACH alignment.
Availability
1.5SMC440A-M3/57T is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, renewable energy inverters, and railway signaling systems requiring stable component supply, halogen-free compliance, and repeatable surge performance across temperature extremes.
Supply support for 1.5SMC440A-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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for industrial, automotive, and computing markets.
The 1.5SMC Series was engineered specifically for robust, high-power transient suppression in harsh environments - emphasizing stable clamping, automated manufacturability, and compliance with AEC-Q101, UL 497B, and IEC 61000-4-5 standards.
FAQ
What is the maximum clamping voltage of the 1.5SMC440A-M3/57T under a 10/1000 µs surge?
The 1.5SMC440A-M3/57T exhibits a maximum clamping voltage (VC) of 602 V when subjected to its rated peak pulse current of 2.5 A with a 10/1000 µs waveform. This value is measured per Figure 1 and Table on page 2 of Vishay document 88303 and defines the upper voltage limit imposed on protected circuitry during transient events.
Is the 1.5SMC440A-M3/57T suitable for automotive applications?
The base 1.5SMC440A-M3/57T is commercial-grade and not AEC-Q101 qualified. However, Vishay offers the functionally identical 1.5SMC440AHM3_B/H variant - same electrical specs and SMC package - which carries full AEC-Q101 qualification for automotive powertrain and body electronics use. Always verify suffix code for qualification status.
What PCB layout guidance applies to the 1.5SMC440A-M3/57T to achieve full 1500 W rating?
To sustain the full 1500 W peak pulse power rating, the 1.5SMC440A-M3/57T must be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in Note (2) of the "Maximum Ratings" table. Smaller pads cause thermal derating and reduce effective surge capability below 1500 W.
Does the 1.5SMC440A-M3/57T have bidirectional capability?
No - the 1.5SMC440A-M3/57T is strictly unidirectional, indicated by the "A" suffix and cathode band marking. Bidirectional variants use the "CA" suffix (e.g., 1.5SMC440CA). Using this part in bidirectional configurations will result in forward conduction during negative transients and potential failure.
What is the meaning of the "M3/57T" suffix in 1.5SMC440A-M3/57T?
"M3" denotes halogen-free, RoHS-compliant construction; "57T" specifies packaging in 7-inch diameter plastic tape and reel, with 850 units per reel. This ordering code ensures traceable, environmentally compliant supply aligned with IPC-1752A and EU RoHS Directive 2011/65/EU requirements for the 1.5SMC440A-M3/57T.
1.5SMC440A-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):
- 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-M3/57T FAQ
1.How can I place an order for 1.5SMC440A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC440A-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 1.5SMC440A-M3/57T reliable?
The price and inventory of 1.5SMC440A-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 1.5SMC440A-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC440A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC440A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC440A-M3/57T?
1.5SMC440A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC440A-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 1.5SMC440A-M3/57T?
For technical support, including 1.5SMC440A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC440A-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC440A-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC440A-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 1.5SMC440A-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC440A-M3/57T?
All 1.5SMC440A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC440A-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 1.5SMC440A-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC440A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC440A-M3/57T Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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