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Vishay General Semiconductor - Diodes Division 1.5SMC56AHM3_A/H
- Part No.:
- 1.5SMC56AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56AHM3_A/H.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,415
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Product details
Overview
1.5SMC56AHM3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 56 V breakdown voltage (VBR = 53.2–58.8 V at IT = 1 mA), 47.8 V stand-off voltage (VWM), clamps to ≤77.0 V at 19.5 A peak pulse current (IPPM), and delivers 1500 W peak pulse power with 10/1000 μs waveform - deployed in automotive ECUs, industrial sensor interfaces, and DC power rails.
For engineers reviewing the 1.5SMC56AHM3_A/H datasheet, 1.5SMC56AHM3_A/H pinout, 1.5SMC56AHM3_A/H application, or 1.5SMC56AHM3_A/H equivalent, this part is selected for high-energy surge immunity in AEC-Q101-qualified systems where low clamping voltage, fast response (<1 ns), and halogen-free SMC (DO-214AB) packaging are required.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 μA leakage at 47.8 V), then rapidly avalanches below 1 ns when transient voltage exceeds VBR, diverting surge current away from downstream ICs or MOSFETs. Its glass-passivated junction ensures stable breakdown and long-term reliability under repetitive surges.
Thermally, it supports operation from –65 °C to +150 °C junction temperature, with RθJA = 75 °C/W (on recommended 8 mm × 8 mm copper pads) and RθJL = 15 °C/W - enabling effective heat dissipation during 1500 W transient events without thermal runaway.
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 clamping behavior |
| VWM | 47.8 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | ≤77.0 V at 19.5 A - clamping voltage limiting stress on protected circuitry during 10/1000 μs transients |
| PPPM | 1500 W - peak surge power handling capability per single 10/1000 μs pulse at 0.01% duty cycle |
| IPPM | 19.5 A - maximum non-repetitive peak pulse current the device safely conducts without failure |
| TJ max. | +150 °C - enables use in under-hood automotive and high-ambient industrial environments |
| Package | SMC (DO-214AB) - surface-mount package with 8.0 mm × 8.0 mm thermal pad footprint for reliable PCB heat transfer |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case with matte tin-plated leads; cathode indicated by band marking; meets UL 94 V-0, MSL Level 1 (260 °C reflow), and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected line ground or low-side reference | Provides low forward voltage drop (VF = 3.5 V at 100 A) during surge conduction in unidirectional configuration |
| Cathode | Current exit point in forward bias; marked with band; connected to protected circuit node | Defines polarity-sensitive placement - must be tied to the line requiring clamping (e.g., 12 V rail or CAN H) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and surge endurance per JESD22 standards |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern automotive and industrial manufacturing without compromising surge performance |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 4 surges without degradation |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD or inductive switch-off), improving system-level immunity |
| Fast response time & glass passivation | Sub-nanosecond turn-on and stable VBR tolerance ensure consistent protection across production lots and lifetime |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-connected ECUs against load dump (ISO 16750-2) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp surges above 47.8 V. Use Value: Limits peak rail voltage to ≤77.0 V during 1500 W pulses, preventing damage to MCU power supplies and CAN transceivers. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in PLC modules exposed to field wiring surges. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector entry to suppress fast transients before signal conditioning circuitry. Use Value: Clamps induced spikes within nanoseconds while adding <1 pF parasitic capacitance - preserving signal integrity up to 100 kHz bandwidth. |
| DC-DC Converter Input Protection | Motor Drive Gate Driver Protection |
Use Scenario: Shielding buck/boost converter inputs from back-EMF and coupling noise in factory automation drives. IC Role / Device Role / Timing Role: Primary overvoltage clamp on HV input stage, coordinated with upstream fuse and common-mode choke. Use Value: Absorbs repetitive 10/1000 μs surges up to 19.5 A without parameter drift, ensuring long-term converter uptime. |
Use Scenario: Protecting high-side/low-side gate driver ICs from Miller-induced voltage spikes during IGBT/MOSFET switching. IC Role / Device Role / Timing Role: Localized TVS across gate-to-source or gate-to-emitter terminals to suppress dv/dt-induced false turn-on. Use Value: Fast clamping (<1 ns) prevents unintended switching events while maintaining gate drive timing accuracy. |
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-E3/5AT | Same VBR range (53.2–58.8 V), but lower PPPM = 400 W and smaller SMA package (DO-214AC); RθJA = 110 °C/W | Suitable only for lower-energy transients (e.g., IEC 61000-4-2 ESD), not load dump or lightning surges | Select when board space is constrained and surge energy is limited to ≤400 W |
| 1.5KE56A | Through-hole DO-201 package; identical electrical specs but higher RθJA (~65 °C/W on larger pads); no AEC-Q101 qualification | Used in legacy industrial power supplies where automated SMT is not required and automotive qualification is unnecessary | Choose for cost-sensitive, non-automotive designs where manual assembly or rework is acceptable |
Compared with 1.5SMC56AHM3_A/H, SMAJ56A-E3/5AT offers smaller footprint but sacrifices 73% peak power handling and thermal robustness, while 1.5KE56A provides equivalent clamping performance in through-hole form but lacks automotive qualification and SMT compatibility.
Availability
1.5SMC56AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and DC power supply protection requiring stable component supply, AEC-Q101 compliance, and halogen-free materials.
Supply support for 1.5SMC56AHM3_A/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 high-reliability diodes, MOSFETs, and passive components for demanding industrial and automotive applications.
The 1.5SMC Series was developed specifically for high-power transient suppression in harsh environments, emphasizing AEC-Q101 qualification, stable clamping, and SMT manufacturability in the SMC package.
FAQ
What is the clamping voltage of the 1.5SMC56AHM3_A/H under maximum rated surge current?
The 1.5SMC56AHM3_A/H clamps to a maximum of 77.0 V at its rated peak pulse current of 19.5 A (10/1000 μs waveform). This value is guaranteed per the Vishay datasheet and reflects worst-case VC under standardized surge testing conditions - critical for verifying safe operating margins of downstream ICs powered from the same rail as the 1.5SMC56AHM3_A/H.
Is the 1.5SMC56AHM3_A/H suitable for automotive applications?
Yes, the 1.5SMC56AHM3_A/H is AEC-Q101 qualified and explicitly designated for automotive use via its HM3 suffix and "_A/H" revision code. It meets requirements for temperature cycling, mechanical shock, and surge endurance relevant to engine control units, body electronics, and infotainment power supplies - making it appropriate for deployment in production vehicles where the 1.5SMC56AHM3_A/H is specified.
What does the "HM3" suffix indicate in 1.5SMC56AHM3_A/H?
The "HM3" suffix in 1.5SMC56AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade "E3" or "M3" versions and confirms compliance with automotive material restrictions and reliability testing - a key identifier when sourcing the 1.5SMC56AHM3_A/H for Tier 1 or OEM programs.
How does the 1.5SMC56AHM3_A/H compare to bidirectional TVS diodes like 1.5SMC56CA?
The 1.5SMC56AHM3_A/H is unidirectional and intended for DC line protection where polarity is fixed (e.g., +12 V rail to ground), offering lower leakage and tighter VBR tolerance than bidirectional equivalents. In contrast, 1.5SMC56CA protects AC or polarity-agnostic lines (e.g., data buses) but exhibits higher reverse leakage and symmetrical clamping - so the 1.5SMC56AHM3_A/H is preferred when circuit topology allows dedicated anode/cathode orientation.
What PCB layout guidance applies to the 1.5SMC56AHM3_A/H for optimal thermal performance?
For optimal thermal performance, the 1.5SMC56AHM3_A/H must be mounted on minimum 8.0 mm × 8.0 mm copper pads per terminal, per Vishay's recommended land pattern. Reducing pad size increases RθJA, risking thermal saturation during repetitive surges - so proper copper area is essential to maintain the 1500 W rating and prevent premature failure of the 1.5SMC56AHM3_A/H in high-duty-cycle applications.
1.5SMC56AHM3_A/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):
- 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/H FAQ
1.How can I place an order for 1.5SMC56AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56AHM3_A/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 1.5SMC56AHM3_A/H reliable?
The price and inventory of 1.5SMC56AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC56AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC56AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56AHM3_A/H?
1.5SMC56AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56AHM3_A/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 1.5SMC56AHM3_A/H?
For technical support, including 1.5SMC56AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56AHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC56AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56AHM3_A/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 1.5SMC56AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC56AHM3_A/H?
All 1.5SMC56AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56AHM3_A/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 1.5SMC56AHM3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC56AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC56AHM3_A/H Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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