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Vishay General Semiconductor - Diodes Division 1.5SMC400AHM3_B/H
- Part No.:
- 1.5SMC400AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC400AHM3_B/H.pdf
- Description:
- TVS DIODE 342VWM 548VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,183
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Product details
Overview
1.5SMC400AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 400 V standoff voltage (VWM), 459 V maximum breakdown voltage (VBR), and 1500 W peak pulse power (10/1000 μs). It provides robust overvoltage protection for high-voltage DC bus lines in industrial motor drives and telecom power supplies.
For engineers reviewing the 1.5SMC400AHM3_B/H datasheet, 1.5SMC400AHM3_B/H pinout, 1.5SMC400AHM3_B/H application, or 1.5SMC400AHM3_B/H equivalent, key selection criteria include clamping voltage (548 V at IPPM), low leakage (<1.0 μA at VWM), AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, and thermal resistance (RθJA = 75 °C/W).
Technical Context
This device operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast response time (<1.0 ns) and stable clamping under repetitive 10/1000 μs surge events. Its 1500 W peak pulse rating is validated with 0.01% duty cycle and derated above TA = 25 °C per Fig. 2.
Designed for high-reliability environments, the 1.5SMC400AHM3_B/H features MSL Level 1 moisture sensitivity, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets UL 94 V-0 flammability requirements. The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101-qualified construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 400 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (Breakdown) | 459 V max at IT = 1.0 mA - Ensures reliable avalanche conduction onset during transients |
| VC (Clamping) | 548 V at IPPM - Limits downstream voltage stress during 1500 W surge events |
| IPPM | 2.7 A - Peak pulse current capability under standardized 10/1000 μs waveform |
| ID (Leakage) | <1.0 μA at VWM - Minimizes standby power loss and avoids false triggering |
| RθJA | 75 °C/W - Enables thermal management on standard 8.0 mm × 8.0 mm copper pads |
| TJ max | +150 °C - Supports operation in high-ambient industrial and automotive under-hood environments |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal avalanche junction | Connected to protected circuit's higher-potential node (e.g., DC+ rail); clamps when voltage exceeds VBR |
| Anode | Cathode of internal avalanche junction | Typically tied to ground or lower-potential reference; completes transient current path during clamping |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Withstands high-energy lightning-induced surges without degradation in telecom and industrial power rails |
| Glass passivated chip junction | Ensures long-term stability and low parameter drift across temperature and lifetime cycling |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global electronics manufacturing and end-of-life handling |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT assembly processes without pre-baking |
Applications
| Industrial Motor Drive DC Bus Protection | Telecom Power Supply Input Stage |
|---|---|
Use Scenario: Protects IGBT gate drivers and bus sensing circuits from switching transients and load dump events on 400 V DC link rails. IC Role / Device Role / Timing Role: Unidirectional TVS placed between DC+ and ground, clamping surges within nanoseconds. Use Value: Limits transient voltage to ≤548 V, preventing damage to 600 V-rated gate drivers and isolated amplifiers. |
Use Scenario: Shields AC/DC front-end rectifiers and PFC controllers from lightning-induced surges on -48 V or +54 V telecom distribution lines. IC Role / Device Role / Timing Role: Primary-level overvoltage clamp on input bulk capacitor node, activated before MOVs reach thermal limit. Use Value: Delivers precise 400 V standoff and 548 V clamping-tighter than MOVs-to avoid nuisance tripping of downstream supervisors. |
| Automotive On-Board Charger (OBC) Input | Renewable Energy Inverter DC Link |
Use Scenario: Safeguards bidirectional OBC power stages during regenerative braking transients and battery fault conditions. IC Role / Device Role / Timing Role: Unidirectional TVS on high-side DC link, referenced to chassis ground, with AEC-Q101 validation. Use Value: Withstands 200 A IFSM surge and operates up to +150 °C ambient-critical for under-hood OBC placement. |
Use Scenario: Protects photovoltaic string combiner boxes and central inverters from grid-switching transients and induced surges. IC Role / Device Role / Timing Role: High-voltage clamping element on 600–1000 V DC strings, mounted directly on busbar terminals. Use Value: 75 °C/W RθJA enables direct mounting on thermally conductive substrates without heatsinks in outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ400A-E3/52 | Lower peak power (600 W), SMB package (smaller footprint, higher RθJA = 100 °C/W) | Not suitable for 1500 W surge environments; limited to low-energy signal-line protection | Select only if space-constrained and surge energy is ≤600 W; verify thermal margin on PCB |
| 1.5KE400A | Through-hole DO-201 package, same VWM/VC but higher RθJA (100 °C/W), no AEC-Q101 or halogen-free certification | Requires wave soldering; unsuitable for automated SMT lines or automotive production | Use only for legacy through-hole designs where rework flexibility outweighs production efficiency and compliance needs |
Compared with SMBJ400A-E3/52 and 1.5KE400A, the 1.5SMC400AHM3_B/H delivers 2.5× higher surge power handling, superior thermal performance in SMT assembly, and full automotive qualification-making it the sole choice for high-reliability, high-energy, surface-mount TVS applications.
Availability
1.5SMC400AHM3_B/H is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive on-board chargers, and renewable energy inverters requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC400AHM3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The 1.5SMC Series targets high-energy transient suppression in harsh environments, designed specifically for industrial, automotive, and telecom systems demanding AEC-Q101 qualification, halogen-free compliance, and repeatable 1500 W surge immunity.
FAQ
What is the clamping voltage of the 1.5SMC400AHM3_B/H under maximum surge conditions?
The 1.5SMC400AHM3_B/H has a maximum clamping voltage (VC) of 548 V when subjected to its rated peak pulse current (IPPM = 2.7 A) using the standard 10/1000 μs waveform. This value is measured at TJ = 25 °C on 8.0 mm × 8.0 mm copper pads and ensures downstream components see voltage limited to this level during transient events. The 1.5SMC400AHM3_B/H maintains this clamping performance across its specified operating temperature range.
Is the 1.5SMC400AHM3_B/H suitable for automotive applications?
Yes, the 1.5SMC400AHM3_B/H is AEC-Q101 qualified, as confirmed by the "HM3" suffix, which denotes halogen-free, RoHS-compliant, and automotive-grade construction. It undergoes rigorous stress testing-including temperature cycling, high-temperature reverse bias (HTRB), and ESD-to meet automotive reliability standards. The 1.5SMC400AHM3_B/H is deployed in on-board chargers, battery management systems, and ADAS power domains where high-voltage transient immunity is critical.
How does the 1.5SMC400AHM3_B/H differ from the standard 1.5SMC400A variant?
The 1.5SMC400AHM3_B/H differs from generic 1.5SMC400A variants in three verified ways: (1) HM3 suffix confirms halogen-free and RoHS-compliant materials; (2) AEC-Q101 qualification for automotive use; (3) "B" revision code indicates updated process control and screening per Vishay Document 88303 Rev 09-Mar-2026. The 1.5SMC400AHM3_B/H retains identical electrical specs (VWM = 400 V, VC = 548 V) but adds compliance and reliability layers not present in commercial-grade versions.
What is the maximum operating temperature for the 1.5SMC400AHM3_B/H?
The 1.5SMC400AHM3_B/H has a maximum junction temperature (TJ max) of +150 °C and an operating junction/storage temperature range of –65 °C to +150 °C. This allows deployment in under-hood automotive locations, industrial enclosures near heat sources, and outdoor renewable energy installations. Derating curves in Fig. 2 of the datasheet define allowable power dissipation above 25 °C ambient, ensuring safe operation up to the full TJ limit.
Does the 1.5SMC400AHM3_B/H require a heatsink for standard operation?
No, the 1.5SMC400AHM3_B/H does not require an external heatsink for standard transient suppression operation. Its thermal resistance (RθJA = 75 °C/W) is specified for mounting on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. Under typical surge duty cycles (0.01%), self-heating is negligible. Continuous power dissipation is limited to PD = 6.5 W at TA = 50 °C, well below the 1500 W peak pulse rating, so the 1.5SMC400AHM3_B/H relies on PCB copper for thermal management-not added heatsinks.
1.5SMC400AHM3_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):
- 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)
1.5SMC400AHM3_B/H FAQ
1.How can I place an order for 1.5SMC400AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC400AHM3_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 1.5SMC400AHM3_B/H reliable?
The price and inventory of 1.5SMC400AHM3_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 1.5SMC400AHM3_B/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC400AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC400AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC400AHM3_B/H?
1.5SMC400AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC400AHM3_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 1.5SMC400AHM3_B/H?
For technical support, including 1.5SMC400AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC400AHM3_B/H requirements.
6.How does Aetrix verify that 1.5SMC400AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC400AHM3_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 1.5SMC400AHM3_B/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC400AHM3_B/H?
All 1.5SMC400AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC400AHM3_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 1.5SMC400AHM3_B/H part is unused and in its original packaging.
Return procedure for 1.5SMC400AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC400AHM3_B/H Tags
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