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Vishay General Semiconductor - Diodes Division 1.5SMC56CA-M3/9AT
- Part No.:
- 1.5SMC56CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56CA-M3/9AT.pdf
- Description:
- TVS DIODE 47.8VWM 77VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,603
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Product details
Overview
1.5SMC56CA-M3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 56 V standoff voltage (VWM), 64.6–71.4 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), clamping voltage of 92.0 V at 16.3 A, and operates across –65 °C to +150 °C. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients in automotive and industrial systems.
For engineers reviewing the 1.5SMC56CA-M3/9AT datasheet, 1.5SMC56CA-M3/9AT pinout, 1.5SMC56CA-M3/9AT application, or 1.5SMC56CA-M3/9AT equivalent, key selection criteria include bidirectional clamping capability, SMC (DO-214AB) package compatibility, 92.0 V max clamping at rated IPPM, RoHS-compliant halogen-free construction (M3 suffix), and AEC-Q101 qualification readiness via HM3 variants.
Technical Context
The 1.5SMC56CA-M3/9AT is a glass-passivated, surface-mount TVS diode optimized for fast response (<1 ns) to transient overvoltages. Its bidirectional architecture enables symmetric clamping in AC-coupled or floating signal paths without polarity constraints.
It delivers 1500 W peak pulse power under standardized 10/1000 µs waveform conditions with 0.01% duty cycle, and maintains stable performance up to 150 °C junction temperature. Thermal resistance is 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads), supporting reliable operation on standard PCB copper pads (8.0 mm × 8.0 mm per terminal).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 58.1 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 64.6 V min / 71.4 V max at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 92.0 V at 16.3 A IPPM - Peak voltage seen by protected circuit during 1500 W surge; critical for downstream component survivability. |
| PPPM (Peak Pulse Power) | 1500 W (10/1000 µs) - Surge energy handling capacity; validates suitability for IEC 61000-4-5 Level 4 compliance designs. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 3.2 mm min body width and 7.75 mm max length; compatible with automated placement and reflow. |
| Construction | Halogen-free, RoHS-compliant (M3 suffix) - Meets environmental compliance requirements for commercial and automotive supply chains. |
| TJ Max | +150 °C - Enables deployment in under-hood automotive, industrial motor drives, and high-temperature power supplies. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional device with no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of symmetrical PN junction; conducts surge current equally in either direction during overvoltage events. |
| Cathode | Transient current exit (bidirectional) | Second terminal of symmetrical structure; completes low-impedance path to ground or return rail during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC lines, differential buses, and floating sensors without polarity concerns or external diode pairing. |
| 1500 W peak pulse rating | Supports robust immunity to severe transients including lightning surges (IEC 61000-4-5) and load dump spikes in 12 V/24 V systems. |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes voltage overshoot during clamping-critical for safeguarding 60 V-rated MOSFETs and 75 V-input DC/DC controllers. |
| MSL Level 1 (260 °C peak) | Allows single-reflow assembly without moisture sensitivity concerns; eliminates baking requirements in high-volume manufacturing. |
| AEC-Q101 qualification path | HM3 variant available; supports functional safety–aligned automotive applications including body control modules and ADAS sensor interfaces. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers from ESD and load-dump-induced transients in vehicle cabin modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential bus lines or between signal and chassis ground. Use Value: Limits transient voltage to ≤92.0 V, preventing damage to 58 V-rated transceivers while maintaining signal integrity during 1500 W surges. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage shunt device mounted at connector interface, upstream of optocoupler or Schmitt trigger input stage. Use Value: Clamps 10/1000 µs transients to 92.0 V within nanoseconds, ensuring input stage remains within absolute maximum ratings during repetitive industrial switching events. |
| Telecom Power Supply Input | Consumer Appliance Motor Drive |
Use Scenario: Secondary-side transient suppression on 48 V telecom rectifier outputs feeding PoE injectors and base station RF modules. IC Role / Device Role / Timing Role: Parallel-connected TVS across DC output rails to absorb coupled surges from AC line disturbances or hot-swap events. Use Value: Withstands 1500 W pulses without degradation, preserving output regulation and preventing latch-up in downstream DC/DC converters. |
Use Scenario: Protecting gate drivers and half-bridge MOSFETs in smart home appliance BLDC motor inverters subjected to back-EMF spikes. IC Role / Device Role / Timing Role: Clamp placed across high-side/low-side driver supply rails or between phase outputs and DC bus. Use Value: Fast <1 ns response and 92.0 V clamping prevent gate oxide rupture and shoot-through failure during commutation transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58CA | Lower peak power (600 W), SMB package (smaller footprint, higher RθJA = 110 °C/W) | Best suited for space-constrained, lower-energy surge environments (e.g., USB ports, low-power sensors) | Select when board area is limited and surge threat level is ≤600 W; verify thermal derating at elevated ambient temperatures. |
| 1.5KE56CA | Through-hole DO-201 package, same 56 V VWM and 92 V VC, but slower response and higher parasitic inductance | Used where manual assembly or legacy through-hole infrastructure remains; less suitable for high-frequency transients | Choose only for cost-sensitive, non-automated production or retrofit scenarios; avoid in high-speed or compact SMT designs. |
Compared with SMBJ58CA and 1.5KE56CA, the 1.5SMC56CA-M3/9AT provides superior surge handling (1500 W vs. 600 W or 1500 W with inferior layout scalability) and modern SMT manufacturability, making it optimal for new automotive and industrial designs requiring AEC-Q101 alignment and high-reliability reflow assembly.
Availability
1.5SMC56CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom power supplies, and consumer motor drive systems requiring stable component supply, halogen-free compliance, and long-term production continuity.
Supply support for 1.5SMC56CA-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was developed for high-power, surface-mount transient suppression in demanding environments-including automotive, industrial, and telecom-where consistent clamping, low leakage, and AEC-Q101 readiness are essential.
FAQ
What is the clamping voltage of the 1.5SMC56CA-M3/9AT under full-rated surge current?
The 1.5SMC56CA-M3/9AT has a maximum clamping voltage (VC) of 92.0 V at its rated peak pulse current (IPPM) of 16.3 A, measured using the standardized 10/1000 µs waveform. This value is guaranteed per Vishay's datasheet (Document Number 88303, Rev. 09-Mar-2026) and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. The 1.5SMC56CA-M3/9AT maintains this clamping performance across its operational temperature range.
Is the 1.5SMC56CA-M3/9AT suitable for automotive applications?
Yes-the 1.5SMC56CA-M3/9AT is halogen-free and RoHS-compliant (M3 suffix), and belongs to the AEC-Q101-qualified 1.5SMC family; the HM3 variant (e.g., 1.5SMC56CAHM3_A/I) is explicitly certified for automotive use. While the M3 suffix itself denotes commercial-grade construction, its identical electrical specs, thermal behavior, and SMC package make the 1.5SMC56CA-M3/9AT a direct drop-in candidate for pre-qualification stages and non-safety-critical automotive subsystems such as infotainment power rails and body electronics.
How does the bidirectional design of the 1.5SMC56CA-M3/9AT affect circuit layout?
The 1.5SMC56CA-M3/9AT has no polarity marking and functions identically in both directions, eliminating orientation constraints during PCB placement. This simplifies layout for AC-coupled lines, differential buses (e.g., RS-485, CAN), and floating sensor inputs-no need for series diodes or dual unidirectional devices. Layout must still follow Vishay's recommended 8.0 mm × 8.0 mm copper pad per terminal to ensure rated 1500 W pulse handling and thermal dissipation, as specified in the 1.5SMC56CA-M3/9AT datasheet.
What is the maximum operating temperature for the 1.5SMC56CA-M3/9AT?
The 1.5SMC56CA-M3/9AT has a maximum junction temperature (TJ max) of +150 °C and an operating junction/storage temperature range of –65 °C to +150 °C. Its thermal resistance is 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads), enabling reliable operation in under-hood automotive, industrial motor controls, and enclosed power supplies-provided PCB copper pad area and airflow meet Vishay's mounting recommendations for the 1.5SMC56CA-M3/9AT.
Does the 1.5SMC56CA-M3/9AT require a heatsink for 1500 W surge handling?
No external heatsink is required for single-event 1500 W surge handling-the 1.5SMC56CA-M3/9AT relies on short-duration thermal mass and PCB copper pads (minimum 8.0 mm × 8.0 mm per terminal) to absorb transient energy. Its 10/1000 µs pulse width results in negligible average power; however, repetitive surges demand derating per Figure 2 in the datasheet. The 1.5SMC56CA-M3/9AT's RθJA of 75 °C/W assumes standard JEDEC test conditions and does not imply continuous 6.5 W dissipation capability.
1.5SMC56CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
1.5SMC56CA-M3/9AT FAQ
1.How can I place an order for 1.5SMC56CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56CA-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 1.5SMC56CA-M3/9AT reliable?
The price and inventory of 1.5SMC56CA-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 1.5SMC56CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC56CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56CA-M3/9AT?
1.5SMC56CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56CA-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 1.5SMC56CA-M3/9AT?
For technical support, including 1.5SMC56CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56CA-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC56CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56CA-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 1.5SMC56CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC56CA-M3/9AT?
All 1.5SMC56CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56CA-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 1.5SMC56CA-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC56CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC56CA-M3/9AT Tags
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