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Vishay General Semiconductor - Diodes Division 1.5SMC56AHM3/I
- Part No.:
- 1.5SMC56AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56AHM3/I.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
1.5SMC56AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power rails and signal lines. It features a 56 V breakdown voltage (VBR = 53.2–58.8 V at 1 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 in automotive sensor interfaces, industrial I/O modules, and DC power input stages.
For engineers reviewing the 1.5SMC56AHM3/I datasheet, 1.5SMC56AHM3/I pinout, 1.5SMC56AHM3/I application, or 1.5SMC56AHM3/I equivalent, key selection considerations include its AEC-Q101 qualification, halogen-free RoHS-compliant HM3 suffix, SMC (DO-214AB) package thermal performance (RθJA = 75 °C/W), and unidirectional polarity marking (cathode band).
Technical Context
The 1.5SMC56AHM3/I operates as a silicon avalanche diode with glass-passivated junction, delivering fast response time (<1 ps) to transient events such as ESD, lightning-induced surges, and inductive switching spikes. Its clamping action begins at VWM = 47.8 V and limits voltage to ≤77.0 V under 19.5 A 10/1000 μs pulses, ensuring downstream ICs like microcontrollers and CAN transceivers remain within safe operating limits.
Thermally, it supports continuous operation up to TJ = 150 °C and is rated for 6.5 W steady-state power dissipation on infinite heatsink at 50 °C. The device meets JESD201 Class 2 whisker resistance and MSL Level 1 (260 °C reflow peak), enabling compatibility with standard automated SMT assembly processes without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V at 1 mA - defines precise avalanche initiation threshold for repeatable overvoltage triggering |
| VWM | 47.8 V - maximum continuous reverse working voltage before leakage exceeds 1 μA; sets system rail margin |
| VC @ IPPM | 77.0 V at 19.5 A - clamped voltage during 10/1000 μs surge; determines protected circuit's voltage stress limit |
| PPPM | 1500 W - peak pulse power handling capacity; enables protection against high-energy transients per IEC 61000-4-5 |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance on standard 8 mm × 8 mm copper pads; guides PCB thermal layout |
| TJ max. | 150 °C - maximum junction temperature; supports operation in under-hood automotive and industrial environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Cathode identified by molded band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line (e.g., 48 V rail); conducts surge current to ground when VIN > VC |
| Anode (unmarked end) | Reference/return path | Typically tied to system ground or low-impedance return plane; completes clamping current path |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables compliance with IEC 61000-4-5 Level 4 (4 kV surge) on 12–48 V systems without external series impedance |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Fulfills EU Directive 2011/65/EU and IPC-1752A material declaration requirements for green manufacturing |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving protection margin |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting 48 V battery-supplied ECUs from load dump and alternator transients per ISO 16750-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input to clamp surges above 47.8 V. Use Value: Limits peak voltage to ≤77.0 V during 19.5 A transients, preventing damage to upstream PMICs and MCU power domains. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: TVS connected across input terminal and common reference to suppress fast transients from relay coil flyback or cable ESD. Use Value: Sub-1 ns response ensures clamping occurs before 24 V interface ICs (e.g., TI SN65HVD230) exceed absolute maximum ratings. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) receiving 48 V DC over Ethernet cables exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary TVS on DC input side of PoE interface IC, coordinated with secondary GDT or MOV for staged protection. Use Value: 1500 W rating handles coupled surges up to 4 kV (IEC 61000-4-5), while 47.8 V VWM avoids false triggering during normal PoE negotiation. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in home appliances (e.g., washing machine drum drives). IC Role / Device Role / Timing Role: Mounted across motor terminals to absorb inductive energy during MOSFET turn-off transitions. Use Value: Clamps 19.5 A spikes to ≤77.0 V, protecting half-bridge gate drivers and reducing radiated EMI in Class B EMC environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ56A-E3/52T (Vishay) | Lower peak power (600 W), SMB package (smaller footprint, higher RθJA = 90 °C/W), same VBR/VWM | Preferred for space-constrained consumer boards where 600 W surge margin suffices | Select when board area is limited and full 1500 W rating is not required; verify thermal derating at elevated ambient |
| 1.5KE56A (ON Semiconductor) | Through-hole DO-201 package, identical electrical specs but no AEC-Q101 or halogen-free certification | Suitable for industrial prototypes or non-automotive production where RoHS/halogen-free compliance is not mandated | Choose for legacy designs using axial-leaded layouts or cost-sensitive non-automotive applications without qualification needs |
Compared with SMBJ56A-E3/52T and 1.5KE56A, the 1.5SMC56AHM3/I uniquely combines AEC-Q101 qualification, halogen-free construction, and 1500 W SMC-package surge capability - making it the only option qualified for automotive front-end power protection where both reliability and regulatory compliance are mandatory.
Availability
1.5SMC56AHM3/I is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, telecom power feeds, and appliance motor drive circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5SMC56AHM3/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, and protection devices with emphasis on high-reliability, high-power, and automotive-qualified components.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 validation, high surge robustness, and consistent clamping performance.
FAQ
What is the clamping voltage of the 1.5SMC56AHM3/I under maximum surge conditions?
The 1.5SMC56AHM3/I exhibits a maximum clamping voltage (VC) of 77.0 V when subjected to its rated peak pulse current of 19.5 A with a 10/1000 μs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads) and defines the upper voltage limit imposed on protected circuitry during surge events. The 1.5SMC56AHM3/I maintains this clamping performance consistently across its qualified operating temperature range.
Is the 1.5SMC56AHM3/I suitable for automotive applications?
Yes, the 1.5SMC56AHM3/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction validated for automotive use. It has passed stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 Rev D. The 1.5SMC56AHM3/I is routinely deployed in engine control modules, body control units, and ADAS sensor power inputs where ISO 16750-2 load dump and ISO 7637-2 transient immunity are required.
What does the "HM3" suffix mean in 1.5SMC56AHM3/I?
The "HM3" suffix in 1.5SMC56AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. "H" indicates halogen-free molding compound; "M3" specifies the RoHS-compliant, matte tin-plated termination finish meeting JESD201 Class 2 whisker resistance. The "I" denotes packaging in 13-inch tape-and-reel (3500 units/reel). This suffix differentiates it from commercial-grade M3 or HE3 variants and confirms full automotive reliability compliance.
How does the 1.5SMC56AHM3/I compare to bidirectional TVS diodes like 1.5SMC56CA?
The 1.5SMC56AHM3/I is unidirectional and features a cathode band for polarity identification, whereas 1.5SMC56CA is bidirectional with no polarity marking and symmetrical clamping in both directions. The 1.5SMC56AHM3/I offers lower leakage at VWM (≤1 μA vs. ≤5 μA for CA types) and is preferred for DC rail protection where reverse conduction must be blocked. Bidirectional versions are used for AC lines or data buses like RS-485 where voltage polarity reverses.
What is the thermal resistance and recommended PCB layout for the 1.5SMC56AHM3/I?
The 1.5SMC56AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal. For optimal thermal performance, use solid copper pours connected to both terminals with multiple thermal vias to inner-layer planes. Avoid narrow traces; ensure pad dimensions match the SMC (DO-214AB) outline (7.75 mm × 6.22 mm body, 2.62 mm lead width) as specified in Vishay document 88303.
1.5SMC56AHM3/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:
- Discontinued at Digi-Key
- 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/I FAQ
1.How can I place an order for 1.5SMC56AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56AHM3/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/I reliable?
The price and inventory of 1.5SMC56AHM3/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/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC56AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56AHM3/I?
1.5SMC56AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56AHM3/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/I?
For technical support, including 1.5SMC56AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56AHM3/I requirements.
6.How does Aetrix verify that 1.5SMC56AHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56AHM3/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/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC56AHM3/I?
All 1.5SMC56AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56AHM3/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/I part is unused and in its original packaging.
Return procedure for 1.5SMC56AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC56AHM3/I Tags
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