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Vishay General Semiconductor - Diodes Division 1.5SMC250AHM3_B/I
- Part No.:
- 1.5SMC250AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC250AHM3_B/I.pdf
- Description:
- TVS DIODE 214VWM 344VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,571
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Product details
Overview
1.5SMC250AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, rated for 250 V standoff voltage (VWM), 237–263 V breakdown voltage (VBR) at 1 mA, and 1500 W peak pulse power (10/1000 μs). It clamps transients to ≤344 V at 4.4 A peak pulse current and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the 1.5SMC250AHM3_B/I datasheet, 1.5SMC250AHM3_B/I pinout, 1.5SMC250AHM3_B/I application, or 1.5SMC250AHM3_B/I equivalent, this device serves as a high-energy, low-clamping-voltage transient protector for DC power rails and signal lines in harsh environments-especially where automotive-grade reliability, halogen-free RoHS compliance, and 150 °C junction operation are required.
Technical Context
This unidirectional TVS diode operates by avalanche breakdown to divert surge energy away from sensitive downstream circuitry. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 μA at 214 V), while its low incremental surge resistance enables rapid clamping response under fast-rising transients (e.g., ISO 7637-2 pulses).
The 1.5SMC250AHM3_B/I is thermally optimized for surface-mount PCB layouts with 8.0 mm × 8.0 mm copper pads per terminal, delivering RθJA = 75 °C/W and RθJL = 15 °C/W. It meets MSL Level 1 (260 °C reflow peak) and supports repetitive surge duty cycles up to 0.01 % at TA = 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 214 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin. |
| VBR (Breakdown) | 237–263 V at IT = 1 mA - Tight ±5% tolerance ensures predictable turn-on threshold across production lots. |
| VC (Clamping) | ≤344 V at IPPM = 4.4 A - Limits voltage seen by protected ICs during 10/1000 μs surges, enabling robust system-level immunity. |
| PPPM | 1500 W (10/1000 μs) - Sustains high-energy transients common in automotive load-dump and inductive switching events. |
| TJ max | +150 °C - Enables reliable operation in under-hood automotive environments and industrial enclosures without derating. |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 7.75 mm × 8.13 mm footprint and matte tin-plated leads. |
| Compliance | AEC-Q101 qualified, halogen-free, RoHS-compliant - Meets automotive qualification and environmental requirements out-of-box. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, unidirectional polarity with cathode band marking. Dimensions: 7.75 mm × 8.13 mm × 2.62 mm (L × W × H); thermal pad layout requires 8.0 mm × 8.0 mm copper area per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-potential node; completes conduction path during reverse-biased surge events. |
| Cathode | High-side connection point | Connected to protected line (e.g., 24 V rail); marked by visible band; carries full surge current into ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensors, with extended temperature cycling and humidity testing. |
| 1500 W peak pulse rating | Withstands ISO 16750-2 load-dump pulses (up to 35 V, 100 ms) and ISO 7637-2 coupled transients without degradation. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage current over 10+ years in high-temperature, high-humidity environments. |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-020 MSL Level 1, supporting lead-free reflow and green manufacturing programs. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on downstream MOSFETs and microcontrollers during surge events, reducing failure risk. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply lines in vehicle body control modules against load-dump transients (up to 60 V, 400 ms) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and DC-DC converter input. Use Value: Clamps 10/1000 μs surges to ≤344 V, preventing latch-up or gate oxide damage in downstream PMICs and MCUs. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLCs exposed to ESD and relay-switching noise. IC Role / Device Role / Timing Role: Point-of-entry TVS on twisted-pair signal lines upstream of instrumentation amplifiers and ADC inputs. Use Value: Sub-1 ns response time and <1 μA leakage at 214 V preserve signal integrity and measurement accuracy over decades of operation. |
| Telecom DC Feeder Protection | Renewable Energy Inverter Control |
|
Use Scenario: Shielding PoE-powered network switches and base station radios from lightning-induced surges on 48 V DC feeder lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input stage before bulk capacitor and hot-swap controller. Use Value: 1500 W rating handles multi-kA induced currents; halogen-free construction meets telecom flame-safety standards (UL 94 V-0). |
Use Scenario: Protecting gate drivers and MCU I/O in solar string inverters subjected to grid-switching transients and partial shading surges. IC Role / Device Role / Timing Role: Secondary clamping device on isolated 15 V auxiliary supply feeding optocouplers and level shifters. Use Value: +150 °C TJ max and AEC-Q101 qualification ensure uninterrupted operation in outdoor enclosures with ambient temperatures up to 85 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ250A-E3/57T | Same VWM (214 V), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy transients; unsuitable for automotive load-dump or industrial motor drives. | Select only for space-constrained consumer designs with <500 W surge exposure. |
| 1.5KE250A | Through-hole TO-204AA (DO-41), identical electrical specs but larger size and no AEC-Q101 or halogen-free certification | Requires manual assembly or wave soldering; not suitable for automated SMT lines or automotive PPAP. | Use only for legacy board refreshes where SMT conversion is impractical and AEC-Q101 is not mandated. |
Compared with SMAJ250A-E3/57T and 1.5KE250A, the 1.5SMC250AHM3_B/I uniquely combines AEC-Q101 qualification, halogen-free compliance, 1500 W surge handling, and SMC packaging-making it the only drop-in solution for new automotive and industrial SMT designs requiring full regulatory alignment and high-energy robustness.
Availability
1.5SMC250AHM3_B/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power systems, and renewable energy inverters requiring stable component supply, long-lifecycle support, and certified compliance documentation.
Supply support for 1.5SMC250AHM3_B/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, and passive components for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for high-power, surface-mount transient suppression in demanding environments-emphasizing AEC-Q101 qualification, tight VBR tolerance, and consistent clamping performance across temperature and lifetime.
FAQ
What is the maximum clamping voltage of the 1.5SMC250AHM3_B/I under a 10/1000 μs surge?
The 1.5SMC250AHM3_B/I clamps to a maximum of 344 V when subjected to its rated peak pulse current of 4.4 A using the standard 10/1000 μs waveform. This value is measured at TA = 25 °C with recommended 8.0 mm × 8.0 mm copper pads per terminal and represents the upper limit of voltage imposed on protected circuitry during surge events.
Is the 1.5SMC250AHM3_B/I suitable for bidirectional transient protection?
No, the 1.5SMC250AHM3_B/I is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the 1.5SMC250CA variant. Using the 1.5SMC250AHM3_B/I in bidirectional AC or floating signal applications would result in forward conduction during negative half-cycles and potential device failure.
Does the 1.5SMC250AHM3_B/I meet AEC-Q101 requirements?
Yes, the 1.5SMC250AHM3_B/I is explicitly AEC-Q101 qualified, as confirmed by its "HM3_B" suffix and Vishay's ordering information table. It undergoes full stress testing-including temperature cycling, humidity bias, and mechanical shock-to validate reliability for automotive under-hood and chassis-mounted applications.
What does the "HM3_B/I" suffix indicate in 1.5SMC250AHM3_B/I?
The "HM3" denotes halogen-free, RoHS-compliant construction; "B" specifies AEC-Q101 qualification for the 250 V to 540 V voltage range; and "I" indicates packaging in 13-inch tape-and-reel format with 3500 units per reel. This full suffix confirms compliance, qualification, and logistics configuration in a single identifier.
What is the thermal resistance junction-to-ambient (RθJA) for the 1.5SMC250AHM3_B/I?
The 1.5SMC250AHM3_B/I has a typical RθJA of 75 °C/W when mounted on the minimum recommended pad layout: 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper areas per terminal. This value assumes still air conditions and is critical for calculating junction temperature rise under continuous power dissipation or repetitive surge duty cycles.
1.5SMC250AHM3_B/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:
- 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/I FAQ
1.How can I place an order for 1.5SMC250AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC250AHM3_B/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 1.5SMC250AHM3_B/I reliable?
The price and inventory of 1.5SMC250AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC250AHM3_B/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC250AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC250AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC250AHM3_B/I?
1.5SMC250AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC250AHM3_B/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 1.5SMC250AHM3_B/I?
For technical support, including 1.5SMC250AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC250AHM3_B/I requirements.
6.How does Aetrix verify that 1.5SMC250AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC250AHM3_B/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 1.5SMC250AHM3_B/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC250AHM3_B/I?
All 1.5SMC250AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC250AHM3_B/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 1.5SMC250AHM3_B/I part is unused and in its original packaging.
Return procedure for 1.5SMC250AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC250AHM3_B/I Tags
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