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Vishay General Semiconductor - Diodes Division 1.5SMC440AHM3_A/H
- Part No.:
- 1.5SMC440AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC440AHM3_A/H.pdf
- Description:
- TVS DIODE 376VWM 602VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,764
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Product details
Overview
1.5SMC440AHM3_A/H 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), 602 V clamping voltage at 2.5 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 μs waveform - suitable for protecting automotive power rails and industrial DC bus interfaces against lightning-induced transients.
For engineers reviewing the 1.5SMC440AHM3_A/H datasheet, 1.5SMC440AHM3_A/H pinout, 1.5SMC440AHM3_A/H application, or 1.5SMC440AHM3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, SMC (DO-214AB) package compatibility with automated placement, low incremental surge resistance, and verified clamping performance under repetitive 0.01% duty cycle surges.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging a glass-passivated silicon junction to achieve fast response time (<1 ns) and stable breakdown behavior across temperature. Its thermal resistance (RθJL = 15 °C/W) supports reliable energy dissipation when mounted on 8.0 mm × 8.0 mm copper pads per terminal.
The device complies with J-STD-020 MSL Level 1 and is halogen-free, RoHS-compliant, and AEC-Q101 qualified (suffix HM3 denotes automotive grade). It exhibits a +0.110 %/°C temperature coefficient of VBR, ensuring predictable voltage drift over its -65 °C to +150 °C operating junction range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 376 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC or AC RMS working limit. |
| VBR min/max | 418 V / 462 V at 1 mA - Verified breakdown threshold ensures consistent turn-on during transients without premature conduction. |
| VC @ IPPM | 602 V at 2.5 A - Clamping voltage under 10/1000 μs surge defines worst-case voltage seen by protected downstream circuitry. |
| PPPM | 1500 W - Peak pulse power rating confirms robustness against IEC 61000-4-5 Level 4 surges (4 kV line-to-ground). |
| IFSM | 200 A - Non-repetitive forward surge current rating validates survivability during accidental polarity reversal events. |
| TJ max | +150 °C - Maximum junction temperature enables use in under-hood automotive environments and high-ambient industrial settings. |
| RθJL | 15 °C/W - Low junction-to-lead thermal resistance allows efficient heat transfer to PCB copper, reducing thermal stress during repeated surges. |
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. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential side of protected line; enables unidirectional clamping from cathode to anode. |
| Cathode | Current exit point during forward conduction; clamping reference | Banded end; connected to higher-potential side (e.g., VIN rail); defines polarity-sensitive protection direction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and chassis applications requiring zero defect reliability and extended temperature cycling. |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 4 kV surge tests without degradation when mounted per recommended pad layout. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage current under humidity and thermal stress per JESD22-A101. |
| MSL Level 1 moisture sensitivity | Enables standard reflow assembly without baking; compatible with lead-free solder profiles up to 260 °C peak. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements for green electronics manufacturing. |
Applications
| Automotive Power Rail Protection | Industrial DC Bus Surge Suppression |
|---|---|
|
Use Scenario: Protecting 24 V/48 V battery-fed control modules (e.g., body ECUs, ADAS sensors) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and LDO/regulator input to clamp transients before they reach sensitive ICs. Use Value: Limits voltage to ≤602 V during 10/1000 μs surges, preventing latch-up or gate oxide damage in downstream PMICs and microcontrollers. |
Use Scenario: Safeguarding motor drive inverters and PLC I/O modules against switching-induced transients on 300–400 V DC bus lines. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing energy from inductive kickback during IGBT/MOSFET turn-off. Use Value: Dissipates 1500 W peak power without failure, maintaining system uptime in factory automation where bus faults occur repeatedly. |
| Telecom Power Interface Protection | Renewable Energy Converter Input Stage |
|
Use Scenario: Shielding PoE-powered equipment (e.g., IP cameras, wireless access points) from induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC distribution, coordinated with upstream MOVs and filters. Use Value: Fast <1 ns response captures fast-rising transients missed by slower MOVs, reducing let-through energy to <10 mJ. |
Use Scenario: Protecting solar charge controllers and wind turbine converters from lightning-induced surges on PV string inputs (up to 1000 VDC). IC Role / Device Role / Timing Role: High-VWM TVS used in series-string configurations to handle partial shading and ground fault transients. Use Value: 376 V VWM enables operation across wide MPPT voltage ranges while clamping >600 V surges without leakage-induced efficiency loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ440A | Same VWM/VC ratings but lower PPPM (400 W), SMA package (smaller footprint, higher RθJA). | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load dump. | Select only for space-constrained consumer-grade designs where 1500 W surge immunity is not required. |
| 1.5KE440A | Through-hole DO-201 package, identical electrical specs but no AEC-Q101 qualification or MSL Level 1 rating. | Not suitable for automated SMT production or under-hood automotive use; requires wave soldering. | Choose only for legacy through-hole systems or prototyping where rework tolerance outweighs production scalability. |
Compared with 1.5SMC440AHM3_A/H, SMAJ440A trades surge robustness for board area, while 1.5KE440A sacrifices SMT compatibility and automotive qualification for identical clamping performance - making 1.5SMC440AHM3_A/H the sole choice for volume automotive and industrial SMT deployments requiring full 1500 W compliance.
Availability
1.5SMC440AHM3_A/H is available at Aetrix Electronics and suitable for automotive ECU protection, industrial DC bus interfaces, telecom power input stages, and renewable energy converter inputs requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC440AHM3_A/H 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, and passive components for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for high-power, surface-mount transient suppression in harsh environments - emphasizing AEC-Q101 qualification, low thermal resistance, and repeatable clamping performance under repetitive surge stress.
FAQ
What is the maximum clamping voltage of the 1.5SMC440AHM3_A/H under a 10/1000 μs surge?
The 1.5SMC440AHM3_A/H clamps to a maximum of 602 V when subjected to its rated 2.5 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88303 and defines the upper voltage limit imposed on protected circuitry during standardized surge events.
Is the 1.5SMC440AHM3_A/H suitable for automotive applications?
Yes, the 1.5SMC440AHM3_A/H is AEC-Q101 qualified (indicated by the HM3 suffix) and rated for operation from -65 °C to +150 °C. Its halogen-free, RoHS-compliant construction and MSL Level 1 rating make it appropriate for under-hood and chassis-mounted automotive electronics requiring certified surge protection.
What does the "_A/H" suffix mean in 1.5SMC440AHM3_A/H?
In 1.5SMC440AHM3_A/H, "HM3" denotes halogen-free, RoHS-compliant, AEC-Q101 qualified construction; "A" indicates the revision level per Vishay's internal documentation; and "H" specifies packaging in 7-inch plastic tape and reel (850 units per reel), per the ordering information table in document 88303.
How does the 1.5SMC440AHM3_A/H compare to bidirectional TVS diodes?
The 1.5SMC440AHM3_A/H is unidirectional and must be installed with correct polarity (cathode toward higher potential). Unlike bidirectional variants (e.g., 1.5SMC440CA), it blocks reverse voltage up to 376 V but conducts only in one direction - ideal for DC rails where polarity is fixed and leakage current must be minimized during normal operation.
What is the thermal resistance from junction to leads for the 1.5SMC440AHM3_A/H?
The 1.5SMC440AHM3_A/H has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W, as specified in the Thermal Characteristics section of Vishay document 88303. This low value enables effective heat transfer to PCB copper pads, supporting reliable operation during repetitive surge events.
1.5SMC440AHM3_A/H 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:
- Discontinued at Digi-Key
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC440AHM3_A/H FAQ
1.How can I place an order for 1.5SMC440AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC440AHM3_A/H 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 1.5SMC440AHM3_A/H reliable?
The price and inventory of 1.5SMC440AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC440AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC440AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC440AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC440AHM3_A/H?
1.5SMC440AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC440AHM3_A/H 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 1.5SMC440AHM3_A/H?
For technical support, including 1.5SMC440AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC440AHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC440AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC440AHM3_A/H 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 1.5SMC440AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC440AHM3_A/H?
All 1.5SMC440AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC440AHM3_A/H, 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 1.5SMC440AHM3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC440AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC440AHM3_A/H Tags
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ESD9B5.0ST5G
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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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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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