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Vishay General Semiconductor - Diodes Division 1.5SMC440AHM3_B/H
- Part No.:
- 1.5SMC440AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC440AHM3_B/H.pdf
- Description:
- TVS DIODE 376VWM 602VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,878
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Product details
Overview
1.5SMC440AHM3_B/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, 1500 W peak pulse power rating (10/1000 µs), and operates across -65 °C to +150 °C junction temperature range - deployed in automotive power supply rails and industrial motor drive DC bus protection.
For engineers reviewing the 1.5SMC440AHM3_B/H datasheet, 1.5SMC440AHM3_B/H pinout, 1.5SMC440AHM3_B/H application, or 1.5SMC440AHM3_B/H equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant HM3 packaging, SMC (DO-214AB) footprint compatibility, and verified clamping performance under repetitive 10/1000 µs transients up to 0.01% duty cycle.
Technical Context
This device implements a glass-passivated silicon avalanche junction optimized for fast response (<1 ns) to ESD and lightning-induced surges. Its unidirectional polarity uses a cathode-band marking and delivers stable clamping with low incremental surge resistance (typical <0.5 Ω) and minimal capacitance (<100 pF at 1 MHz, zero bias).
The 1.5SMC440AHM3_B/H is thermally rated for 75 °C/W junction-to-ambient (RθJA) on standard 8.0 mm × 8.0 mm copper pads and supports peak forward surge current of 200 A (8.3 ms half-sine), making it suitable for placement downstream of rectifiers or upstream of DC-DC converters in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 376 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin in protected line. |
| VBR (Breakdown, min/max) | 418 V / 462 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping, at IPPM) | 602 V at 2.5 A - Measured peak voltage across device during 10/1000 µs transient; directly limits stress on downstream ICs or MOSFETs. |
| PPPM | 1500 W - Peak pulse power handling per 10/1000 µs waveform; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| IFSM | 200 A - Single half-sine surge current rating (8.3 ms); supports protection of high-current power stages without fuse coordination issues. |
| TJ Range | -65 °C to +150 °C - Extended thermal operating envelope validated for under-hood automotive and industrial control cabinet use. |
| AEC-Q101 Qualified | Yes - Certified for automotive-grade reliability including HTOL, TC, UHAST, and mechanical shock testing per AEC specification. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, MSL Level 1 (260 °C reflow peak), halogen-free and RoHS-compliant (HM3 suffix). Cathode identified by black band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward conduction mode | Connected to lower-potential side (e.g., ground or return path) when used in unidirectional clamp configuration. |
| Cathode | Current exit point in forward conduction; clamping node in reverse bias | Connected to protected line (e.g., 48 V rail); absorbs surge energy by avalanching into this terminal during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables single-device protection against severe lightning-induced transients per IEC 61000-4-5 without parallel staging. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and chassis applications requiring long-term reliability under thermal cycling and vibration. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving protection margin for sensitive gate drivers and microcontrollers. |
| MSL Level 1 moisture sensitivity | Eliminates bake requirements prior to reflow assembly, reducing manufacturing cost and process complexity. |
| Glass passivated junction | Ensures stable leakage current (<1 µA at VWM) and long-term parameter stability under humidity and temperature stress. |
Applications
| Automotive Power Supply Protection | Industrial Motor Drive DC Bus |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs and ADAS domain controllers from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp spikes above 376 V. Use Value: Limits voltage seen by downstream PMICs and CAN transceivers to ≤602 V, preserving functional safety integrity per ISO 16750-2. |
Use Scenario: Safeguarding IGBT gate drivers and current sense amplifiers on 300–400 V DC bus in servo drives. IC Role / Device Role / Timing Role: Clamping device mounted across bus terminals to suppress switching-induced voltage spikes during IGBT turn-off. Use Value: Prevents false triggering or destruction of gate drivers by limiting transient overshoot to 602 V with sub-1 ns response. |
| Telecom Power Interface | Renewable Energy Inverter Input Stage |
Use Scenario: Surge protection on -48 V telecom rectifier outputs feeding base station RF modules. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, cathode-to-rail to absorb positive-going surges only. Use Value: Maintains low leakage (<1 µA) during normal operation while delivering 1500 W clamping during lightning strikes on outdoor cabling. |
Use Scenario: Input-stage protection for solar string inverters exposed to grid-switching transients and nearby lightning. IC Role / Device Role / Timing Role: Mounted across PV+ and PV− inputs to clamp differential-mode surges exceeding 376 V. Use Value: Withstands 200 A surge current (8.3 ms) and operates reliably at 150 °C ambient, matching inverter thermal profiles. |
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-E3/52 | Lower peak power (600 W), SMB package (smaller thermal mass), same VWM/VC ratings | Not AEC-Q101 qualified; limited to commercial-grade consumer/industrial use | Select when board space is constrained and surge energy is ≤600 W; verify thermal derating at elevated ambient. |
| 1.5KE440A | Through-hole DO-201 package, identical electrical specs but no AEC-Q101 or MSL Level 1 rating | Requires wave soldering; unsuitable for automated SMT lines or automotive reflow profiles | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMBJ440A-E3/52 and 1.5KE440A, the 1.5SMC440AHM3_B/H provides higher surge robustness (1500 W vs. 600 W or 1500 W with inferior thermal packaging), full automotive qualification, and SMT process compatibility - critical for production-scale automotive and industrial power systems.
Availability
1.5SMC440AHM3_B/H is available at Aetrix Electronics and suitable for automotive electronics, industrial motor drives, telecom power interfaces, and renewable energy inverters requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for 1.5SMC440AHM3_B/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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on high-reliability, high-power, and automotive-qualified components.
The 1.5SMC Series was developed specifically for surface-mount transient suppression in demanding power electronics applications, combining high pulse power, AEC-Q101 compliance, and industry-standard SMC packaging for drop-in integration into automotive and industrial PCBs.
FAQ
What is the clamping voltage of the 1.5SMC440AHM3_B/H at its rated peak pulse current?
The 1.5SMC440AHM3_B/H has a maximum clamping voltage (VC) of 602 V at 2.5 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The 1.5SMC440AHM3_B/H maintains this clamping performance across its full operating temperature range and after repeated surge exposure.
Is the 1.5SMC440AHM3_B/H qualified for automotive applications?
Yes, the 1.5SMC440AHM3_B/H carries the HM3 suffix, indicating halogen-free, RoHS-compliant construction and full AEC-Q101 qualification. It has passed stress tests including high-temperature operating life (HTOL), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and mechanical shock - confirming suitability for under-hood and chassis-mounted automotive electronics.
What package type does the 1.5SMC440AHM3_B/H use, and what are its mounting requirements?
The 1.5SMC440AHM3_B/H uses the SMC (DO-214AB) surface-mount package with matte tin-plated leads. It requires mounting on minimum 8.0 mm × 8.0 mm copper pads per terminal for rated thermal performance and must be processed per J-STD-020 MSL Level 1 (peak reflow temperature 260 °C). The cathode is marked by a visible band on the body.
How does the 1.5SMC440AHM3_B/H compare to bidirectional TVS diodes in surge protection design?
The 1.5SMC440AHM3_B/H is unidirectional and intended for DC circuits where polarity is fixed - such as positive power rails referenced to ground. Unlike bidirectional variants (e.g., 1.5SMC440CA), it blocks reverse current and offers lower leakage (<1 µA at VWM). For AC or floating differential lines, a bidirectional device would be required; the 1.5SMC440AHM3_B/H is not interchangeable in those topologies.
What is the maximum operating temperature and thermal resistance of the 1.5SMC440AHM3_B/H?
The 1.5SMC440AHM3_B/H has a maximum junction temperature (TJ) of +150 °C and a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads. Derating curves in the datasheet show usable power capability down to ~3.5 W at 100 °C ambient, enabling reliable operation in sealed enclosures or high-temperature industrial environments.
1.5SMC440AHM3_B/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:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC440AHM3_B/H FAQ
1.How can I place an order for 1.5SMC440AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC440AHM3_B/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_B/H reliable?
The price and inventory of 1.5SMC440AHM3_B/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_B/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC440AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC440AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC440AHM3_B/H?
1.5SMC440AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC440AHM3_B/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_B/H?
For technical support, including 1.5SMC440AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC440AHM3_B/H requirements.
6.How does Aetrix verify that 1.5SMC440AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC440AHM3_B/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_B/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC440AHM3_B/H?
All 1.5SMC440AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC440AHM3_B/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_B/H part is unused and in its original packaging.
Return procedure for 1.5SMC440AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC440AHM3_B/H Tags
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