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Vishay General Semiconductor - Diodes Division 1.5SMC56AHM3_A/I
- Part No.:
- 1.5SMC56AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56AHM3_A/I.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,281
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Product details
Overview
1.5SMC56AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection. It features 56 V breakdown voltage (VBR = 53.2–58.8 V at IT = 1.0 mA), 47.8 V stand-off voltage (VWM), 77.0 V maximum clamping voltage (VC) at 19.5 A peak pulse current, and 1500 W peak pulse power capability with 10/1000 µs waveform - deployed to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power rails.
For engineers reviewing the 1.5SMC56AHM3_A/I datasheet, 1.5SMC56AHM3_A/I pinout, 1.5SMC56AHM3_A/I application, or 1.5SMC56AHM3_A/I equivalent, this part delivers AEC-Q101 qualification, halogen-free RoHS compliance, MSL Level 1 moisture sensitivity, and verified clamping performance under repetitive 0.01% duty-cycle transients - critical for ESD and lightning-induced surge hardening in safety-critical embedded systems.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM (47.8 V), it transitions rapidly from high-impedance blocking state to low-impedance conduction, diverting surge current away from downstream circuitry. Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance.
Designed for automated SMT assembly on standard PCB copper pads (8.0 mm × 8.0 mm per terminal), it supports peak forward surge current of 200 A (8.3 ms half-sine) and maintains operation across –65 °C to +150 °C junction temperature range, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W - enabling reliable thermal management in compact power interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V at 1.0 mA test current - defines precise avalanche onset window for repeatable clamping threshold |
| VWM | 47.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA, ensuring no false triggering in nominal 48 V rail applications |
| VC @ IPPM | 77.0 V at 19.5 A - clamping voltage during full 1500 W transient, limiting downstream voltage stress to safe levels |
| PPPM | 1500 W with 10/1000 µs waveform - enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) |
| IFSM | 200 A (8.3 ms half-sine) - supports single-event inrush tolerance without bond-wire fusing |
| TJ max. | +150 °C - allows operation in under-hood automotive environments and high-ambient industrial enclosures |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 0.305" × 0.320" footprint and matte tin-plated leads compliant with J-STD-002 solderability |
Pinout & Package
Package: SMC (DO-214AB), molded case with UL 94 V-0 flammability rating; cathode indicated by band marking on unidirectional devices; terminals are matte tin-plated for J-STD-002-compliant soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected circuit ground or low-side reference | Provides return path for surge current during reverse-biased clamping; must be routed with low-inductance trace to minimize VL overshoot |
| Cathode | Current exit point in forward bias; marked with band; connected to protected line (e.g., 48 V rail) | Serves as high-side connection to vulnerable node; band orientation confirms polarity during automated optical inspection (AOI) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for ADAS power supply inputs and body control modules |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets JEDEC JESD201 Class 2 whisker resistance and global environmental regulations - required for Tier 1 automotive procurement |
| 1500 W peak pulse power (10/1000 µs) | Withstands repeated IEC 61000-4-5 surges up to 4 kV without degradation - eliminates need for external series impedance in many 24–48 V DC systems |
| Low incremental surge resistance | Minimizes VC rise under high di/dt events - critical for protecting fast-switching MOSFET gates and CAN transceivers |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free reflow profiles without baking or special handling - reduces manufacturing cost and yield risk |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Guarding |
|---|---|
|
Use Scenario: Protecting 48 V battery-fed ECUs against load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power input and chassis ground, clamping within 1 ns after overvoltage onset. Use Value: Limits peak rail voltage to ≤77 V during 1500 W surges, preventing damage to 60 V-rated DC-DC controllers and microcontrollers. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) from ESD and inductive switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted directly at connector interface, referenced to local signal ground. Use Value: Clamps transients to <80 V while maintaining <1 µA leakage at 47.8 V - preserving signal integrity and ADC accuracy. |
| Telecom DC Power Input Stage | Consumer Device USB-C Power Path |
|
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) from lightning-induced surges on 48 V PSE lines. IC Role / Device Role / Timing Role: Primary-level TVS on DC input before secondary regulation, coordinated with upstream fuse. Use Value: Absorbs 1500 W pulses without failure, enabling compliance with IEC 61000-4-5 Ed. 3, Level 4 (4 kV line-to-earth). |
Use Scenario: Overvoltage protection on USB-C VBUS line in portable docking stations supporting 48 V PD 3.1 Extended Power Range. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between VBUS and system ground, sized to survive hot-plug transients. Use Value: Withstands 200 A surge (8.3 ms) and clamps to 77 V - prevents latch-up in USB-C PD controllers rated for 56 V absolute maximum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ56A-E3/57T | Same VBR/VC specs but lower PPPM = 400 W; SMA package (smaller footprint, higher RθJA = 100 °C/W) | Not AEC-Q101 qualified; limited to commercial-grade consumer/industrial use; unsuitable for automotive under-hood deployment | Select only for space-constrained non-automotive designs where 400 W surge margin suffices and thermal budget permits higher junction rise |
| 1.5KE56A-T | Through-hole DO-201 package; identical electrical specs but slower response due to higher parasitic inductance; no AEC-Q101 or halogen-free certification | Requires wave soldering or hand assembly; incompatible with automated SMT lines; not approved for automotive OEM BOMs | Choose only for legacy through-hole prototyping or repair scenarios where board rework is acceptable and volume production is not required |
Compared with SMAJ56A-E3/57T and 1.5KE56A-T, the 1.5SMC56AHM3_A/I uniquely combines AEC-Q101 qualification, halogen-free compliance, 1500 W surge capacity, and SMC package manufacturability - making it the sole option meeting full automotive PPAP requirements for 48 V system protection.
Availability
1.5SMC56AHM3_A/I is available at Aetrix Electronics and suitable for automotive ECU power conditioning, industrial sensor interface hardening, and telecom DC input protection requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for 1.5SMC56AHM3_A/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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where AEC-Q101 validation, surge robustness, and SMT scalability are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC56AHM3_A/I under maximum surge conditions?
The 1.5SMC56AHM3_A/I exhibits a maximum clamping voltage (VC) of 77.0 V at 19.5 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. The 1.5SMC56AHM3_A/I maintains this clamping performance across its specified operating temperature range and is validated for repetitive surges at 0.01% duty cycle.
Is the 1.5SMC56AHM3_A/I qualified for automotive applications?
Yes, the 1.5SMC56AHM3_A/I carries AEC-Q101 qualification, confirmed by Vishay's documentation for the HM3 suffix variant. It undergoes stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD verification per automotive reliability standards. The 1.5SMC56AHM3_A/I is explicitly designated for use in automotive subsystems such as body control modules, ADAS power supplies, and infotainment DC inputs where sustained operation at 150 °C junction temperature and immunity to load dump transients are required.
What does the "HM3" suffix indicate in 1.5SMC56AHM3_A/I?
The "HM3" suffix in 1.5SMC56AHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade E3/M3 versions and confirms compliance with JEDEC JESD201 Class 2 whisker resistance, UL 94 V-0 flammability, and automotive-grade material categorization. The "_A/I" further specifies revision A and 13-inch tape-and-reel packaging (3500 units per reel), ensuring consistency in manufacturing and traceability for high-volume automotive production.
How does the 1.5SMC56AHM3_A/I compare to bidirectional TVS diodes in the same series?
The 1.5SMC56AHM3_A/I is unidirectional and intended for DC line protection where polarity is fixed - e.g., 48 V positive rail to ground. Bidirectional variants like 1.5SMC56CA have symmetric clamping in both directions and are used for AC lines or data buses (e.g., RS-485). The 1.5SMC56AHM3_A/I offers tighter VBR tolerance (53.2–58.8 V) and lower leakage (<1.0 µA at VWM) than equivalent bidirectional parts, which trade off some precision for dual-polarity capability. Its cathode band marking also simplifies automated placement verification.
What is the thermal resistance profile of the 1.5SMC56AHM3_A/I?
The 1.5SMC56AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-leads resistance (RθJL) of 15 °C/W, measured on a 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad per terminal. These values assume standard JEDEC test board conditions and confirm suitability for thermally constrained layouts. For sustained power dissipation, derating above 25 °C ambient follows Fig. 2 in the datasheet, with full 6.5 W rating only at TA = 50 °C on infinite heatsink - emphasizing the need for adequate copper pour in production PCBs.
1.5SMC56AHM3_A/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):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 19.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC56AHM3_A/I FAQ
1.How can I place an order for 1.5SMC56AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56AHM3_A/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 1.5SMC56AHM3_A/I reliable?
The price and inventory of 1.5SMC56AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC56AHM3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC56AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56AHM3_A/I?
1.5SMC56AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56AHM3_A/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 1.5SMC56AHM3_A/I?
For technical support, including 1.5SMC56AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56AHM3_A/I requirements.
6.How does Aetrix verify that 1.5SMC56AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56AHM3_A/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 1.5SMC56AHM3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC56AHM3_A/I?
All 1.5SMC56AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56AHM3_A/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 1.5SMC56AHM3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC56AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC56AHM3_A/I Tags
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Diodes Incorporated
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