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Vishay General Semiconductor - Diodes Division 1.5SMC400AHE3_ALL
- Part No.:
- 1.5SMC400AHE3_ALL
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC400AHE3_ALL.pdf
- Description:
- TVS DIODE 342VWM 548VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,852
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Product details
Overview
1.5SMC400AHE3_ALL from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, rated for 400 V standoff voltage (VWM), 420 V maximum breakdown voltage (VBR), and 1500 W peak pulse power (10/1000 µs). It provides robust overvoltage protection for high-voltage DC rails in industrial power supplies and automotive battery-line circuits.
For engineers reviewing the 1.5SMC400AHE3_ALL datasheet, 1.5SMC400AHE3_ALL pinout, 1.5SMC400AHE3_ALL application, or 1.5SMC400AHE3_ALL equivalent, key selection criteria include clamping voltage (548 V at 2.7 A), low leakage (<1 µA at 342 V), AEC-Q101 qualification, and MSL Level 1 moisture sensitivity - all critical for high-reliability 400 V system surge protection.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 400 V standoff threshold. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance under repetitive 10/1000 µs transients.
Designed for high-energy transient suppression, it delivers 548 V clamping voltage at 2.7 A peak pulse current, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads), enabling reliable operation up to 150 °C junction temperature in constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 400 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR (Breakdown Voltage) | 380–420 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on under overvoltage stress. |
| VC (Clamping Voltage) | 548 V at IPPM = 2.7 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 1500 W - Sustains single 10/1000 µs transients without failure; meets IEC 61000-4-5 Level 4 requirements. |
| ID (Reverse Leakage) | <1 µA at 342 V - Negligible standby current; avoids power loss or false triggering in high-impedance sensing paths. |
| TJ max | 150 °C - Enables use in under-hood automotive and industrial environments without derating below full rating. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress test standard; supports PPAP documentation for OEM programs. |
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; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for protected line | Connected to high-voltage rail (e.g., 400 V DC bus); carries surge current into device during clamping. |
| Cathode | Output terminal to ground/reference | Connected to system ground or low-impedance return path; establishes reference for clamping action. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Withstands severe lightning-induced surges per IEC 61000-4-5 without degradation. |
| Glass passivated chip junction | Ensures long-term stability of VBR and low parameter drift across temperature and lifetime. |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT assembly without pre-baking or special handling. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control units and battery management systems. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD or switching noise). |
Applications
| Industrial HV DC Power Supply Protection | Automotive 48 V Battery-Line Surge Suppression |
|---|---|
Use Scenario: Protecting rectified 400 V DC output stages in switch-mode power supplies against load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between output rail and chassis ground to limit transient overvoltage. Use Value: Clamps 10/1000 µs surges to ≤548 V, preventing damage to downstream MOSFETs and controllers rated for 600 V max. |
Use Scenario: Safeguarding 48 V mild-hybrid vehicle battery interfaces against ISO 7637-2 Pulse 5a load dump events. IC Role / Device Role / Timing Role: Primary overvoltage protector on main battery feed line upstream of DC-DC converters. Use Value: Withstands 1500 W pulses while maintaining <1 µA leakage at 342 V, ensuring minimal standby drain and compliance with OEM leakage budgets. |
| Telecom Central Office DC Feeds | Renewable Energy Inverter DC Link Protection |
Use Scenario: Shielding -48 V telecom power distribution boards from lightning-induced surges on long outdoor cable runs. IC Role / Device Role / Timing Role: Unidirectional TVS mounted at board entry point to shunt common-mode transients to ground. Use Value: Fast response time and 548 V clamping prevent latch-up or burnout in telecom ASICs and PMICs with 65 V absolute max ratings. |
Use Scenario: Protecting 400 V DC link capacitors and IGBT gate drivers in solar inverters exposed to grid-switching transients. IC Role / Device Role / Timing Role: High-energy TVS placed across DC bus to clamp voltage spikes during rapid IGBT turn-off. Use Value: 1500 W rating and 150 °C TJ max enable sustained operation in enclosed inverter enclosures without thermal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ400A-E3/57T | Same 400 V VWM, but lower PPPM (400 W) and higher VC (644 V at 0.62 A); SMA package (smaller footprint, higher RθJA). | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or automotive load dump. | Select only for space-constrained, low-surge industrial sensors where 400 W suffices. |
| 1.5KE400A | Through-hole DO-201 package; identical electrical specs (VWM/VBR/VC/PPPM), but no AEC-Q101 qualification or MSL Level 1 rating. | Not suitable for automated SMT lines or automotive production; requires wave soldering or hand assembly. | Use only for prototyping or legacy through-hole designs where RoHS-compliant SMT is not required. |
Compared with 1.5SMC400AHE3_ALL, SMAJ400A-E3/57T offers smaller size but sacrifices 73% peak power handling and clamping performance, while 1.5KE400A matches electrical specs but lacks SMT process compatibility and automotive qualification - making 1.5SMC400AHE3_ALL the sole choice for high-reliability, high-energy, automated 400 V TVS applications.
Availability
1.5SMC400AHE3_ALL is available at Aetrix Electronics and suitable for industrial power supplies, automotive battery-line protection, telecom DC feeds, and renewable energy inverters requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5SMC400AHE3_ALL 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, and protection devices with emphasis on reliability, ruggedness, and automotive-grade validation.
The 1.5SMC Series was developed for high-energy transient suppression in demanding environments, targeting applications where robustness, AEC-Q101 compliance, and consistent clamping performance across temperature are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC400AHE3_ALL under a 10/1000 µs surge?
The 1.5SMC400AHE3_ALL clamps to 548 V at its rated peak pulse current of 2.7 A under a 10/1000 µs waveform. This value is measured and guaranteed per Vishay's datasheet (Document Number 88303, page 2), and represents the maximum voltage imposed on the protected circuit during standardized surge testing - critical for verifying compatibility with downstream components' absolute maximum ratings.
Is the 1.5SMC400AHE3_ALL suitable for automotive applications?
Yes, the 1.5SMC400AHE3_ALL is AEC-Q101 qualified (indicated by the HE3 suffix), meaning it has passed rigorous stress tests for automotive electronics including temperature cycling, humidity bias, and mechanical shock. It is explicitly approved for use in engine control modules, battery management systems, and 48 V mild-hybrid architectures - confirmed in Vishay's ordering information table (page 3) and qualification notes.
What does the "HE3" suffix mean in 1.5SMC400AHE3_ALL?
The "HE3" suffix in 1.5SMC400AHE3_ALL denotes a RoHS-compliant, AEC-Q101 qualified variant with matte tin-plated leads and JESD 201 Class 2 whisker resistance. Per Vishay's mechanical data (page 1), HE3 parts meet automotive reliability standards and are rated for peak reflow temperatures up to 260 °C (MSL Level 1), distinguishing them from commercial-grade E3 or M3 versions.
How does the 1.5SMC400AHE3_ALL compare to bidirectional TVS diodes like 1.5SMC400CA?
The 1.5SMC400AHE3_ALL is unidirectional and designed for DC line protection with polarity-sensitive placement (cathode to ground), whereas 1.5SMC400CA is bidirectional and used for AC or floating signal lines. Their VWM and VBR differ: 1.5SMC400AHE3_ALL has 400 V VWM (unidirectional), while 1.5SMC400CA has only 342 V VWM (bidirectional), per Vishay's electrical characteristics table (page 2). Substitution requires circuit-level polarity and voltage margin review.
What is the thermal resistance of the 1.5SMC400AHE3_ALL, and how does it affect layout?
The 1.5SMC400AHE3_ALL has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-leads (RθJL) of 15 °C/W, per Vishay's Thermal Characteristics table (page 3). To maintain safe operation at full 1500 W pulse rating, PCB layout must use minimum 0.31" x 0.31" (8.0 mm x 8.0 mm) copper pads per terminal - as specified in the derating curves (Fig. 2) - otherwise thermal saturation may cause premature failure.
1.5SMC400AHE3_ALL 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):
- 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_ALL FAQ
1.How can I place an order for 1.5SMC400AHE3_ALL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC400AHE3_ALL 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_ALL reliable?
The price and inventory of 1.5SMC400AHE3_ALL 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_ALL is usually 5 days.
3.What payment methods are accepted for 1.5SMC400AHE3_ALL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC400AHE3_ALL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC400AHE3_ALL?
1.5SMC400AHE3_ALL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC400AHE3_ALL 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_ALL?
For technical support, including 1.5SMC400AHE3_ALL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC400AHE3_ALL requirements.
6.How does Aetrix verify that 1.5SMC400AHE3_ALL is sourced from the original manufacturer or authorized distributors?
All 1.5SMC400AHE3_ALL 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_ALL meets industry standards.
7.What is the process for return or replacement of 1.5SMC400AHE3_ALL?
All 1.5SMC400AHE3_ALL units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC400AHE3_ALL, 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_ALL part is unused and in its original packaging.
Return procedure for 1.5SMC400AHE3_ALL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC400AHE3_ALL Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
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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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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