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Vishay General Semiconductor - Diodes Division 1.5SMC400AHE3_A/H
- Part No.:
- 1.5SMC400AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC400AHE3_A/H.pdf
- Description:
- TVS DIODE 342VWM 548VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:9,245
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Product details
Overview
1.5SMC400AHE3_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 400 V standoff voltage (VWM), 459 V minimum breakdown voltage (VBR), 1500 W peak pulse power (10/1000 μs), 2.7 A maximum clamping current (IPPM), and 548 V maximum clamping voltage (VC) - deployed in automotive power supply rails, industrial motor drives, and telecom DC feed protection.
For engineers reviewing the 1.5SMC400AHE3_A/H datasheet, 1.5SMC400AHE3_A/H pinout, 1.5SMC400AHE3_A/H application, or 1.5SMC400AHE3_A/H equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and clamping performance under repetitive 10/1000 μs transients.
Technical Context
This device operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast response (<1 ns) to ESD and lightning-induced surges. Its 1500 W peak pulse rating is validated per IEC 61000-4-5 (10/1000 μs waveform) at 0.01% duty cycle, with derating above 25 °C per Fig. 2 of the datasheet.
The 1.5SMC400AHE3_A/H exhibits low incremental surge resistance and excellent clamping ratio (VC/VBR ≈ 1.20), enabling reliable overvoltage limiting in 48 V–400 V DC systems. It meets J-STD-020 MSL Level 1 and supports lead-free reflow up to 260 °C peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 400 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin in 400 V nominal systems. |
| VBR (Breakdown) | 380–420 V at 1 mA - Avalanche onset range; ensures predictable turn-on during overvoltage events without premature leakage. |
| VC (Clamping) | 548 V at IPPM - Maximum voltage seen by protected circuit during 1500 W transient; critical for downstream IC/MOSFET voltage rating compliance. |
| PPPM | 1500 W (10/1000 μs) - Peak surge energy handling capability; supports IEC 61000-4-5 Level 4 immunity testing. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard 8 mm × 8 mm copper pads; determines power derating in real PCB layouts. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive and industrial ambient environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suffix HE3 denotes qualification. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VLINE exceeds VWM. |
| Anode (unmarked end) | Reference / return path | Typically tied to system ground or lower-potential rail; completes clamping path during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables robust protection against IEC 61000-4-5 4 kV surge tests in 48 V–400 V DC power rails without derating. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control units, body electronics, and ADAS power supplies. |
| Glass passivated junction | Ensures stable leakage current (<1 μA at VWM) and long-term reliability under thermal cycling and humidity stress. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without pre-baking or special handling requirements. |
| Low clamping ratio (VC/VBR ≈ 1.20) | Minimizes voltage overshoot across protected MOSFETs or controllers during fast transients. |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive DC Bus |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs and infotainment modules from load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and primary DC/DC converter input. Use Value: Clamps 120 V/200 ms load dump spikes to ≤548 V, preventing damage to 60 V-rated input MOSFETs and controllers. |
Use Scenario: Safeguarding IGBT gate drivers and bus voltage sensors in variable-frequency drives. IC Role / Device Role / Timing Role: Parallel-connected TVS on DC link capacitor terminals to absorb switching-induced voltage spikes. Use Value: Limits transient overvoltage to <550 V during 100 A+ commutation events, preserving sensor accuracy and gate oxide integrity. |
| Telecom DC Feed Protection | Renewable Energy Inverter Input |
Use Scenario: Shielding PoE-powered equipment and remote radio units from induced surges on 48 V DC feed lines. IC Role / Device Role / Timing Role: Primary surge clamp at DC input connector, upstream of EMI filter and DC/DC stage. Use Value: Withstands repeated 10/1000 μs surges up to 1500 W while maintaining <1 μA leakage at 400 V, ensuring low standby loss. |
Use Scenario: Protecting string-level monitoring circuits and MPPT controllers in solar inverters exposed to lightning-induced grid transients. IC Role / Device Role / Timing Role: High-voltage TVS on PV input side, rated for 400 V continuous operation and >500 V clamping. Use Value: Maintains functional safety by limiting transient voltage to below 550 V, within insulation coordination limits of Class II isolation barriers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ400A-E3/52 | Lower PPPM (600 W), SMB package (smaller footprint, higher RθJA = 110 °C/W), same VWM/VBR range. | Not AEC-Q101 qualified; suitable for cost-sensitive consumer or non-automotive industrial use only. | Select when board space is constrained and surge energy is ≤600 W; verify thermal margin due to higher thermal resistance. |
| 1.5KE400A | Through-hole DO-201 package, identical electrical specs but no AEC-Q101 qualification, higher mounting inductance. | Limited to prototyping or legacy through-hole designs; not suitable for automated SMT production or automotive volume programs. | Choose only for manual assembly or legacy repair; avoid in new automotive or high-reliability SMT designs requiring AEC-Q101. |
Compared with SMBJ400A-E3/52 and 1.5KE400A, the 1.5SMC400AHE3_A/H delivers higher surge robustness (1500 W vs. 600 W or 1500 W with inferior thermal performance), automotive qualification, and SMT manufacturability - making it the preferred choice for production-grade 400 V DC protection where reliability and volume assembly matter.
Availability
1.5SMC400AHE3_A/H is available at Aetrix Electronics and suitable for automotive power systems, industrial motor drives, telecom DC feeds, and renewable energy inverters requiring stable component supply with full traceability and lifecycle support.
Supply support for 1.5SMC400AHE3_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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series targets high-power transient suppression in automotive, industrial, and telecom infrastructure - engineered for AEC-Q101 compliance, high surge robustness, and seamless SMT integration in harsh-environment systems.
FAQ
What is the maximum clamping voltage of the 1.5SMC400AHE3_A/H under a 10/1000 μs surge?
The 1.5SMC400AHE3_A/H has a maximum clamping voltage (VC) of 548 V at its rated peak pulse current (IPPM). This value is measured under standardized 10/1000 μs waveform conditions with 1.0 mA test current for breakdown verification and is guaranteed across the full operating temperature range per Vishay Document 88303.
Is the 1.5SMC400AHE3_A/H AEC-Q101 qualified?
Yes, the 1.5SMC400AHE3_A/H is AEC-Q101 qualified. The "HE3" suffix explicitly denotes AEC-Q101 qualification, and the device is listed in the Vishay 1.5SMC Series datasheet (Rev. 09-Mar-2026, Doc. #88303) as qualified for automotive applications, including temperature cycling, HTRB, and ESD testing.
What package type does the 1.5SMC400AHE3_A/H use, and what are its key mechanical features?
The 1.5SMC400AHE3_A/H uses the SMC (DO-214AB) surface-mount package: low-profile, RoHS-compliant, with matte tin-plated leads solderable per J-STD-002. Its dimensions are 7.11 mm × 6.22 mm × 2.62 mm, and it requires 8.0 mm × 8.0 mm copper pads per terminal for rated thermal performance and 1500 W pulse handling.
How does the 1.5SMC400AHE3_A/H differ from bidirectional variants like 1.5SMC400CA?
The 1.5SMC400AHE3_A/H is unidirectional, with cathode marked by a band and intended for DC line protection where polarity is fixed. In contrast, 1.5SMC400CA is bidirectional, lacks polarity marking, and protects AC or floating lines - but has lower VBR (≤220 V) and is not offered in the 400 V rating. The 1.5SMC400AHE3_A/H cannot substitute for bidirectional use without circuit redesign.
What is the thermal resistance and maximum junction temperature specification for the 1.5SMC400AHE3_A/H?
The 1.5SMC400AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads, and a maximum junction temperature (TJ max.) of +150 °C. These values define its safe continuous power dissipation limit (6.5 W at TA = 50 °C) and suitability for under-hood or enclosed industrial environments.
1.5SMC400AHE3_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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 342V
- Voltage - Breakdown (Min):
- 380V
- Voltage - Clamping (Max) @ Ipp:
- 548V
- Current - Peak Pulse (10/1000µs):
- 2.7A
- 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)
1.5SMC400AHE3_A/H FAQ
1.How can I place an order for 1.5SMC400AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC400AHE3_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 1.5SMC400AHE3_A/H reliable?
The price and inventory of 1.5SMC400AHE3_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 1.5SMC400AHE3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC400AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC400AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC400AHE3_A/H?
1.5SMC400AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC400AHE3_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 1.5SMC400AHE3_A/H?
For technical support, including 1.5SMC400AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC400AHE3_A/H requirements.
6.How does Aetrix verify that 1.5SMC400AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC400AHE3_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 1.5SMC400AHE3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC400AHE3_A/H?
All 1.5SMC400AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC400AHE3_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 1.5SMC400AHE3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC400AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC400AHE3_A/H Tags
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