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Vishay General Semiconductor - Diodes Division 1.5SMC250AHM3_B/H
- Part No.:
- 1.5SMC250AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC250AHM3_B/H.pdf
- Description:
- TVS DIODE 214VWM 344VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,815
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Product details
Overview
1.5SMC250AHM3_B/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 250 V standoff voltage (VWM), 263 V maximum breakdown voltage (VBR), 344 V clamping voltage (VC) at 4.4 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power supply rails and industrial motor drive I/O protection.
For engineers reviewing the 1.5SMC250AHM3_B/H datasheet, 1.5SMC250AHM3_B/H pinout, 1.5SMC250AHM3_B/H application, or 1.5SMC250AHM3_B/H equivalent, key selection criteria include clamping performance under 10/1000 µs surges, AEC-Q101 qualification status, SMC (DO-214AB) package thermal resistance, and unidirectional polarity marking for correct PCB orientation.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR (237–263 V), it avalanches to divert transient energy away from downstream circuitry. Its glass-passivated junction ensures stable breakdown and low leakage (<1 µA at VWM), while the low incremental surge resistance enables rapid voltage limiting during fast transients.
The device is rated for 150 °C maximum junction temperature and derates linearly above 25 °C ambient per Figure 2; thermal resistance from junction-to-ambient is 75 °C/W on standard 8.0 mm × 8.0 mm copper pads. It meets J-STD-020 MSL Level 1 and is halogen-free, RoHS-compliant, and AEC-Q101 qualified for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 214 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (Breakdown) | 237–263 V at 1 mA - Confirmed avalanche initiation range for reliable clamping onset |
| VC (Clamping) | 344 V at 4.4 A IPPM - Peak voltage seen by protected circuit during 10/1000 µs surge |
| PPPM | 1500 W - Surge energy handling capacity with standardized 10/1000 µs waveform |
| RθJA | 75 °C/W - Thermal resistance defining junction temperature rise under 6.5 W steady-state dissipation |
| TJ max. | +150 °C - Absolute maximum junction temperature enabling operation in under-hood automotive environments |
| Polarity | Unidirectional - Cathode marked with band; blocks forward current until VF ≈ 3.5 V at 100 A |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); cathode identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to protected line ground or low-side reference; carries full IPPM during clamping |
| Cathode | Reverse-biased terminal / Clamping node | Marked with band; ties to higher-potential rail (e.g., 24 V supply); defines VWM and VBR thresholds |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive power electronics including engine control modules and body controllers |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Level 4 surges without degradation |
| Low clamping ratio (VC/VBR ≈ 1.36) | Minimizes overvoltage stress on downstream MOSFETs or CAN transceivers during transients |
| Halogen-free & RoHS-compliant | Meets automotive OEM material compliance requirements (e.g., GMW3172, Ford WSS-M99P9999-A1) |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; peak IR reflow temperature up to 260 °C |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs against load dump transients up to 60 V for 400 ms. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor. Use Value: Clamps peak voltage to ≤344 V, preventing damage to DC-DC converters and microcontrollers rated for 36 V absolute max. | Use Scenario: Shielding PLC analog input channels from inductive kickback during solenoid switching. IC Role / Device Role / Timing Role: Shunt protector across signal conditioning op-amp inputs and supply pins. Use Value: Limits transient overshoot to <350 V within 1 ns response time, preserving ADC accuracy and isolation barrier integrity. |
| Telecom DC Power Feeds | Renewable Energy Inverter Control |
Use Scenario: Safeguarding PoE-powered equipment front-end rectifiers from lightning-induced surges on 48 V DC lines. IC Role / Device Role / Timing Role: Primary surge clamp on DC input before DC-DC stage and hot-swap controller. Use Value: Absorbs 1500 W pulses without failure, maintaining system uptime per IEC 61000-4-5 Class 4 immunity requirements. | Use Scenario: Protecting gate drivers and current sensors in solar string inverters exposed to grid-switching transients. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; this unidirectional part guards positive rail only, paired with reverse-polarity diode. Use Value: Enables 150 °C junction operation in enclosed enclosures, supporting extended lifetime under continuous thermal stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ250A | Lower PPPM (600 W), same VWM/VBR range, SMB package (smaller footprint, higher RθJA = 100 °C/W) | Not AEC-Q101 qualified; suitable for commercial-grade industrial controls but not automotive under-hood | Select when board space is constrained and surge energy is ≤600 W; verify thermal margin with layout |
| 1.5KE250A | Through-hole DO-201 package, identical electrical specs, no AEC-Q101 qualification, higher mounting thermal resistance | Limited to non-automotive, non-SMT production; incompatible with automated placement | Choose only for legacy through-hole designs or prototyping where reflow compatibility is unnecessary |
Compared with SMBJ250A and 1.5KE250A, the 1.5SMC250AHM3_B/H delivers automotive-grade reliability in an SMT-optimized package with superior thermal performance (RθJA = 75 °C/W) and guaranteed 1500 W surge handling - critical for AEC-Q101-compliant power rail protection.
Availability
1.5SMC250AHM3_B/H is available at Aetrix Electronics and suitable for automotive ECU power rails, industrial motor drive I/O protection, and telecom DC feed surge suppression requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for 1.5SMC250AHM3_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, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The 1.5SMC Series targets high-energy transient suppression in harsh environments, with design focus on AEC-Q101 compliance, low clamping ratios, and robust SMC packaging for under-hood and industrial applications.
FAQ
What is the clamping voltage of the 1.5SMC250AHM3_B/H under a 10/1000 µs surge?
The 1.5SMC250AHM3_B/H has a maximum clamping voltage (VC) of 344 V at 4.4 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88303 and defines the upper voltage limit imposed on protected circuitry during surge events.
Is the 1.5SMC250AHM3_B/H AEC-Q101 qualified?
Yes, the 1.5SMC250AHM3_B/H is AEC-Q101 qualified. The "HM3" suffix denotes halogen-free, RoHS-compliant construction, and the "B" revision code (per ordering table on page 3 of datasheet 88303) confirms AEC-Q101 qualification for the 250 V to 540 V voltage range variants.
What does the "_B/H" suffix mean in 1.5SMC250AHM3_B/H?
The "_B" indicates AEC-Q101 qualification for the 250 V to 540 V range, and "/H" specifies packaging in 7-inch plastic tape and reel with 850 units per reel (per Ordering Information table, page 3). The "HM3" base suffix confirms halogen-free and RoHS-compliant materials.
Can the 1.5SMC250AHM3_B/H be used in bidirectional applications?
No, the 1.5SMC250AHM3_B/H is unidirectional only. Bidirectional variants use the "CA" suffix (e.g., 1.5SMC250CA). This part has a cathode band marking and is intended for DC rail protection where polarity is fixed; using it in AC or reversible signal paths would cause forward conduction during negative half-cycles.
What is the thermal resistance and maximum power dissipation of the 1.5SMC250AHM3_B/H?
The 1.5SMC250AHM3_B/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 steady-state power dissipation (PD) rating of 6.5 W at TA = 50 °C. These values define safe continuous operation limits and must be validated against actual PCB layout and airflow conditions.
1.5SMC250AHM3_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):
- 214V
- Voltage - Breakdown (Min):
- 237V
- Voltage - Clamping (Max) @ Ipp:
- 344V
- Current - Peak Pulse (10/1000µs):
- 4.4A
- 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)
1.5SMC250AHM3_B/H FAQ
1.How can I place an order for 1.5SMC250AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC250AHM3_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 1.5SMC250AHM3_B/H reliable?
The price and inventory of 1.5SMC250AHM3_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 1.5SMC250AHM3_B/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC250AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC250AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC250AHM3_B/H?
1.5SMC250AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC250AHM3_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 1.5SMC250AHM3_B/H?
For technical support, including 1.5SMC250AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC250AHM3_B/H requirements.
6.How does Aetrix verify that 1.5SMC250AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC250AHM3_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 1.5SMC250AHM3_B/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC250AHM3_B/H?
All 1.5SMC250AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC250AHM3_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 1.5SMC250AHM3_B/H part is unused and in its original packaging.
Return procedure for 1.5SMC250AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC250AHM3_B/H Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
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Diodes Incorporated
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