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Vishay General Semiconductor - Diodes Division 1.5SMC56A-M3/9AT
- Part No.:
- 1.5SMC56A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56A-M3/9AT.pdf
- Description:
- TVS DIODE 47.8VWM 77VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:7,450
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Product details
Overview
1.5SMC56A-M3/9AT from Vishay General Semiconductor is a unidirectional surface-mount 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 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 a 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and DC power rail protection.
For engineers reviewing the 1.5SMC56A-M3/9AT datasheet, 1.5SMC56A-M3/9AT pinout, 1.5SMC56A-M3/9AT application, or 1.5SMC56A-M3/9AT equivalent, this device delivers verified clamping performance, halogen-free RoHS compliance (M3 suffix), SMC (DO-214AB) package compatibility, and AEC-Q101 qualification readiness - critical for ESD and lightning surge immunity design validation in harsh-environment electronics.
Technical Context
The 1.5SMC56A-M3/9AT operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast response time (<1 ps) and low incremental surge resistance. Its clamping action begins at VWM = 47.8 V and limits transient energy to ≤77.0 V at IPPM = 19.5 A under standardized 10/1000 µs pulses.
Thermally, it supports operation from –65 °C to +150 °C junction temperature, with RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable performance on standard 8.0 mm × 8.0 mm copper pads. The cathode band marking confirms polarity for correct PCB orientation in series-connected protection circuits.
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 operating voltage before leakage exceeds 1 µA, ensuring no false conduction during normal operation |
| VC @ IPPM | 77.0 V at 19.5 A - clamping voltage limiting downstream circuit stress during 1500 W transients |
| PPPM | 1500 W - peak pulse power handling per 10/1000 µs waveform, supporting IEC 61000-4-5 Level 4 surge immunity |
| IPPM | 19.5 A - peak pulse current capacity, directly usable for PCB trace sizing and fuse coordination |
| TJ max. | +150 °C - enables deployment in under-hood automotive and high-ambient industrial environments without derating |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 0.320" x 0.246" footprint and matte tin-plated leads |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case meeting UL 94 V-0 flammability rating; terminals are matte tin plated, solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to protected line's lower-potential side (e.g., GND or return path) in unidirectional clamp configuration |
| Cathode | Current exit terminal during reverse avalanche | Connected to protected line's higher-potential side (e.g., VIN, signal line) - band-marked end for orientation verification |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against IEC 61000-4-5 4 kV/2 Ω surge tests without cascaded stages |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes voltage overshoot across protected ICs, reducing risk of latch-up or gate oxide damage in MOSFETs and microcontrollers |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements and EU ELV Directive for automotive supply chain compliance |
| MSL Level 1 (260 °C reflow) | Supports standard lead-free SMT assembly without moisture sensitivity handling or baking protocols |
| AEC-Q101 qualification option | Base P/NHM3_X variant available for automotive-grade reliability validation (e.g., HTOL, TC, UHAST) |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and ground, clamping transients before they reach precision amplifier inputs. Use Value: Maintains signal integrity below 77.0 V during 19.5 A surges, preventing ADC saturation and enabling fault-free operation after 500+ surge events. |
Use Scenario: Safeguarding 24 V DC digital input channels in programmable logic controllers exposed to relay coil flyback and field wiring ESD. IC Role / Device Role / Timing Role: Standoff-mode protector mounted upstream of optocoupler input, absorbing inductive kick energy without forward conduction. Use Value: Withstands 1500 W pulses while holding leakage <1 µA at 47.8 V, eliminating false triggering during long-term 24 V nominal operation. |
| DC Power Rail Surge Suppression | Telecom Line Interface Protection |
Use Scenario: Secondary-side overvoltage suppression on 48 V telecom power supplies and PoE injectors subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS across output capacitor, activated only during >47.8 V excursions to shunt excess energy to ground. Use Value: Clamps 10/1000 µs transients to ≤77.0 V within nanoseconds, preserving downstream DC-DC converter FETs rated for 60 V absolute maximum. |
Use Scenario: Protecting Ethernet PHY interface pins (e.g., MDI-X pairs) from ESD (IEC 61000-4-2 ±15 kV) and induced surges in outdoor network equipment. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to local ground, placed adjacent to connector to minimize inductance in surge path. Use Value: Achieves sub-1 ns response with 77.0 V clamping, keeping PHY receiver differential voltage within ±12 V common-mode range during surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58A-E3/52T (Vishay) | Same 58 V VBR range but SMB package (smaller 3.5 mm × 3.5 mm footprint); 600 W PPPM, lower IPPM (10.1 A) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4; preferred where board space is constrained and surge severity is moderate | Select when footprint reduction outweighs peak power requirement, and system-level testing confirms 600 W sufficiency |
| 1.5KE56A (ON Semiconductor) | Through-hole DO-201 package; identical VBR (53.2–58.8 V), same 1500 W rating, but larger thermal mass and manual assembly requirement | Used in legacy designs or high-reliability aerospace systems requiring axial-leaded redundancy; incompatible with automated SMT lines | Choose only for through-hole production lines or where mechanical robustness under vibration exceeds SMT retention needs |
Compared with SMBJ58A-E3/52T, the 1.5SMC56A-M3/9AT delivers 2.5× higher surge power in the same mounting category; versus 1.5KE56A, it enables full SMT automation and reduces assembly cost while maintaining identical electrical protection thresholds.
Availability
1.5SMC56A-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC digital inputs, and DC power rail surge suppression requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification pathway support.
Supply support for 1.5SMC56A-M3/9AT 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 power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-power transient suppression in space-constrained SMT applications across automotive, industrial, and telecom sectors - prioritizing low clamping voltage, repeatable avalanche behavior, and process-controlled packaging.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC56A-M3/9AT?
The 1.5SMC56A-M3/9AT has a specified breakdown voltage (VBR) range of 53.2 V to 58.8 V at 1 mA test current, representing a ±5% tolerance around the nominal 56 V rating. This tight distribution ensures consistent clamping onset across production lots and supports deterministic circuit margining in safety-critical designs.
Is the 1.5SMC56A-M3/9AT suitable for bidirectional transient protection?
No, the 1.5SMC56A-M3/9AT is a unidirectional TVS diode, intended for protection of DC-biased lines where polarity is fixed. For bidirectional applications such as AC signal lines or data buses, Vishay offers the 1.5SMC56CA variant - which uses the same package and clamping performance but conducts symmetrically in both directions.
Does the 1.5SMC56A-M3/9AT meet automotive qualification standards?
The base 1.5SMC56A-M3/9AT is commercial-grade, but Vishay provides AEC-Q101 qualified versions under ordering codes HM3_X (e.g., 1.5SMC56AHM3_A/9AT). These undergo stress testing including HTOL, temperature cycling, and unbiased HAST to validate reliability for automotive under-hood and chassis applications.
What is the maximum clamping voltage of the 1.5SMC56A-M3/9AT under surge conditions?
The 1.5SMC56A-M3/9AT clamps to a maximum of 77.0 V when subjected to its rated 19.5 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is guaranteed across temperature and lifetime, forming the upper voltage boundary seen by downstream components during surge events.
How does the M3 suffix affect the environmental compliance of the 1.5SMC56A-M3/9AT?
The M3 suffix on the 1.5SMC56A-M3/9AT indicates halogen-free, RoHS-compliant construction per JEDEC JS709 and IPC-1752A, with bromine and chlorine content each <900 ppm. It also meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability - required for consumer, industrial, and Tier-1 automotive supply chains.
1.5SMC56A-M3/9AT 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC56A-M3/9AT FAQ
1.How can I place an order for 1.5SMC56A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56A-M3/9AT 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 1.5SMC56A-M3/9AT reliable?
The price and inventory of 1.5SMC56A-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC56A-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC56A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56A-M3/9AT?
1.5SMC56A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56A-M3/9AT 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 1.5SMC56A-M3/9AT?
For technical support, including 1.5SMC56A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56A-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC56A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56A-M3/9AT 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 1.5SMC56A-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC56A-M3/9AT?
All 1.5SMC56A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56A-M3/9AT, 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 1.5SMC56A-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC56A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC56A-M3/9AT Tags
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