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Vishay General Semiconductor - Diodes Division 1.5SMC440AHE3_A/I
- Part No.:
- 1.5SMC440AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC440AHE3_A/I.pdf
- Description:
- TVS DIODE 376VWM 602VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,695
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Product details
Overview
1.5SMC440AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, rated for 440 V standoff voltage (VWM), 462 V maximum breakdown voltage (VBR), and 1500 W peak pulse power (10/1000 µs). It delivers 2.5 A peak pulse current (IPPM) with clamping voltage of 602 V at rated surge, and is AEC-Q101 qualified for automotive applications including powertrain and body electronics.
For engineers reviewing the 1.5SMC440AHE3_A/I datasheet, 1.5SMC440AHE3_A/I pinout, 1.5SMC440AHE3_A/I application, or 1.5SMC440AHE3_A/I equivalent, this device serves as a high-voltage transient protector for DC bus lines, battery input stages, and industrial power supplies where robust ESD and lightning surge immunity are required under IEC 61000-4-2/4-5 compliance constraints.
Technical Context
The 1.5SMC440AHE3_A/I operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast response time (<1 ns) and low incremental surge resistance. Its clamping behavior is defined by a 10/1000 µs double-exponential waveform, with thermal derating applied above 25 °C per Fig. 2 in the datasheet.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal, it meets J-STD-020 MSL Level 1 (peak reflow 260 °C) and supports automated placement. Polarity is marked by a cathode band; no marking applies to bidirectional variants - but this part is unidirectional only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 376 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC bus operating margin. |
| VBR (Breakdown Voltage) | 418–462 V at 1 mA test current - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 602 V at IPPM - Peak voltage seen across protected circuit during 1500 W transient; critical for downstream IC voltage rating margin. |
| PPPM (Peak Pulse Power) | 1500 W (10/1000 µs) - Surge energy handling capacity; validates suitability for IEC 61000-4-5 Level 4 (4 kV line-to-ground) protection. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments without thermal shutdown. |
| RθJA | 75 °C/W - Thermal resistance junction-to-ambient; informs heatsinking requirements when mounted on standard PCB copper pads. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
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; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected circuit's positive rail or signal line; conducts surge current to ground during overvoltage. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during transient event. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables single-device protection against severe lightning-induced surges in 48 V and 400 V DC systems without external series impedance. |
| Glass passivated chip junction | Ensures stable VBR over lifetime and improved humidity resistance versus epoxy-passivated alternatives - critical for under-hood automotive use. |
| AEC-Q101 qualification (HE3 suffix) | Validates long-term reliability in automotive applications including engine control units, ADAS power modules, and battery management systems. |
| MSL Level 1 moisture sensitivity | Permits standard SMT reflow without baking; eliminates pre-conditioning steps and reduces manufacturing cost and risk. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving protection fidelity for sensitive gate drivers. |
Applications
| Automotive Battery Input Protection | Industrial DC Link Surge Suppression |
|---|---|
|
Use Scenario: Protecting 48 V mild-hybrid vehicle battery inputs from load dump transients up to 60 V and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery+ and chassis ground to clamp transients before they reach DC/DC converters and MCU power rails. Use Value: With 602 V clamping at 2.5 A IPPM and AEC-Q101 qualification, 1.5SMC440AHE3_A/I prevents latch-up or destruction of downstream PMICs during 12 V/48 V system switching events. |
Use Scenario: Safeguarding 400 V DC link in motor drives and solar inverters against lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: High-voltage TVS connected across DC bus terminals to limit transient overvoltage during grid faults or cable coupling events. Use Value: 1500 W PPPM rating and 440 V VWM allow direct integration into 400 V nominal systems while maintaining >20 % voltage margin above steady-state bus voltage. |
| Telecom Power Feeding Protection | EV Charging Station Interface Protection |
|
Use Scenario: Shielding PoE++ (IEEE 802.3bt) Type 4 power feeding circuits operating up to 57 V from induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Unidirectional TVS on DC feed line to suppress common-mode transients entering via Ethernet cables exposed to lightning fields. Use Value: 602 V VC ensures protected PHY and controller ICs (rated ≤65 V) remain within absolute maximum ratings even during worst-case 10/1000 µs surges. |
Use Scenario: Front-end protection for AC/DC and DC/DC stages in CCS (Combined Charging System) EVSE units subjected to utility-side surges. IC Role / Device Role / Timing Role: Primary clamping device on 1000 V DC output stage, coordinated with MOVs and GDTs in multi-stage architecture. Use Value: 1.5SMC440AHE3_A/I provides precise, low-leakage (≤1 µA at 376 V) clamping at high voltage - reducing standby power loss versus Zener-based alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ440A | Same VWM (376 V), identical SMC package, but lower PPPM (400 W); higher leakage (5 µA vs. 1 µA). | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy transients in non-automotive industrial settings. | Select only if system-level surge stress is below 400 W and AEC-Q101 qualification is not required. |
| ON Semiconductor 1.5KE440A | Through-hole DO-201 package; same electrical specs but incompatible with SMT production; no AEC-Q101 option. | Requires manual insertion or wave soldering; unsuitable for high-volume automotive PCB assembly. | Consider only for legacy through-hole designs or prototyping where rework tolerance outweighs automation needs. |
Compared with SMAJ440A and 1.5KE440A, the 1.5SMC440AHE3_A/I uniquely combines SMT compatibility, 1500 W surge capability, AEC-Q101 qualification, and low leakage - making it the only drop-in solution for high-reliability 400 V+ automotive and industrial DC bus protection.
Availability
1.5SMC440AHE3_A/I is available at Aetrix Electronics and suitable for automotive battery management, industrial DC link protection, and EV charging station interface design requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC440AHE3_A/I 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 automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for high-power transient suppression in space-constrained SMT applications, targeting automotive powertrain, industrial motor drives, and renewable energy systems demanding AEC-Q101 validation and robust 1500 W surge handling.
FAQ
What is the clamping voltage of the 1.5SMC440AHE3_A/I at its rated peak pulse current?
The 1.5SMC440AHE3_A/I has a maximum clamping voltage (VC) of 602 V at its rated peak pulse current (IPPM) of 2.5 A, measured under the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events. The 1.5SMC440AHE3_A/I maintains this clamping performance without degradation after repeated surges within its specified duty cycle (0.01 %).
Is the 1.5SMC440AHE3_A/I suitable for automotive applications?
Yes, the 1.5SMC440AHE3_A/I is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's 1.5SMC Series datasheet (Doc. #88303). It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD verification - making it approved for use in automotive powertrain, body control, and ADAS subsystems where reliability under harsh environmental conditions is mandatory.
What does the "_A/I" suffix mean in 1.5SMC440AHE3_A/I?
The "_A/I" suffix in 1.5SMC440AHE3_A/I indicates two key attributes: "A" denotes the voltage variant (440 V VWM), and "I" specifies packaging in 13-inch diameter plastic tape and reel with a 3500-unit quantity per reel. This format supports high-volume SMT assembly lines and is distinct from the "H" (7-inch reel, 850 units) variant. The "HE3" portion confirms RoHS-compliant, AEC-Q101-qualified construction.
How does the 1.5SMC440AHE3_A/I compare to bidirectional TVS diodes?
The 1.5SMC440AHE3_A/I is unidirectional and intended for DC line protection where polarity is fixed - such as battery inputs or DC bus rails. Unlike bidirectional variants (e.g., 1.5SMC440CA), it conducts only in reverse bias and blocks forward current up to 3.5 V at 100 A. This makes it inappropriate for AC-coupled or differential signal lines but optimal for minimizing leakage and maximizing clamping precision in high-voltage DC systems.
What is the thermal resistance and how does it affect PCB layout for the 1.5SMC440AHE3_A/I?
The 1.5SMC440AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. To maintain TJ ≤ 150 °C under sustained 6.5 W power dissipation, designers must ensure adequate copper area and avoid thermal isolation. Reducing RθJA via internal layer copper pours or thermal vias directly beneath the SMC footprint improves surge repetition capability and long-term reliability.
1.5SMC440AHE3_A/I 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC440AHE3_A/I FAQ
1.How can I place an order for 1.5SMC440AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC440AHE3_A/I 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 1.5SMC440AHE3_A/I reliable?
The price and inventory of 1.5SMC440AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC440AHE3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC440AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC440AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC440AHE3_A/I?
1.5SMC440AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC440AHE3_A/I 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 1.5SMC440AHE3_A/I?
For technical support, including 1.5SMC440AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC440AHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC440AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC440AHE3_A/I 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 1.5SMC440AHE3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC440AHE3_A/I?
All 1.5SMC440AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC440AHE3_A/I, 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 1.5SMC440AHE3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC440AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC440AHE3_A/I Tags
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Diodes Incorporated
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