Vishay General Semiconductor - Diodes Division SM6T10CA-M3/52

Overview

SM6T10CA-M3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping ESD and surge transients on signal/power lines. It features 10 V standoff voltage (VWM), 11.3 V minimum breakdown voltage (VBR), 600 W peak pulse power (10/1000 μs), 16.7 V maximum clamping voltage at rated IPPM, and operates from −65 °C to +150 °C - used in automotive sensor protection and industrial I/O interface circuits.

For engineers reviewing the SM6T10CA-M3/52 datasheet, SM6T10CA-M3/52 pinout, SM6T10CA-M3/52 application, or SM6T10CA-M3/52 equivalent, key selection criteria include bidirectional clamping capability, SMB footprint compatibility, AEC-Q101 qualification status (not applicable to this M3 variant), 10 V stand-off level, and 16.7 V clamping performance under 36 A peak pulse current.

Technical Context

The SM6T10CA-M3/52 implements a symmetrical silicon avalanche junction structure enabling identical clamping behavior in both polarities. Its low-inductance SMB package and glass-passivated chip junction support fast response (<1 ns) to transients while maintaining stable VBR (11.3–12.6 V) and low leakage (<5 μA at 10 V).

Rated for 600 W peak pulse power with 10/1000 μs waveform and derated above 25 °C per thermal curve, it delivers 16.7 V clamping at 36 A IPPM when mounted on 5.0 mm × 5.0 mm copper pads - meeting JEDEC J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance requirements.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and J-STD-002 solderability standard. Bidirectional construction means no polarity marking - terminals are functionally symmetric.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Compared with SMAJ10CA and P6SMB10CA, the SM6T10CA-M3/52 offers halogen-free construction (per J-STD-201 Class 2) and optimized thermal performance on standard PCB pads, making it suitable for cost-sensitive commercial designs requiring environmental compliance without AEC-Q101 certification.

Availability

SM6T10CA-M3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, consumer USB port protection, and telecom line interface circuits requiring stable component supply and halogen-free RoHS compliance.

Supply support for SM6T10CA-M3/52 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 SM6T Series is engineered for high-energy transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and communications systems where consistent clamping performance and robust surge handling are critical.

FAQ

What is the clamping voltage of the SM6T10CA-M3/52 under standard test conditions?

The SM6T10CA-M3/52 has a maximum clamping voltage (VC) of 16.7 V at 36 A peak pulse current with a 10/1000 μs waveform, measured per Figure 1 in Vishay document 88385. This value is guaranteed across temperature and represents the upper limit of voltage seen by protected circuitry during surge events - a key parameter for ensuring downstream IC survival in 12 V systems.

Is the SM6T10CA-M3/52 suitable for automotive applications requiring AEC-Q101 qualification?

No, the SM6T10CA-M3/52 is not AEC-Q101 qualified. It uses the "M3" suffix indicating halogen-free RoHS compliance for commercial-grade use. For automotive applications, Vishay specifies AEC-Q101 variants with "HM3" suffix (e.g., SM6T10CAHM3_B/I). The SM6T10CA-M3/52 remains appropriate for non-safety-critical automotive subsystems where qualification is not mandated.

How does the bidirectional configuration of the SM6T10CA-M3/52 affect its circuit implementation?

The SM6T10CA-M3/52 has no polarity marking and conducts identically in both directions, allowing direct placement across any two-node interface without orientation concern. This simplifies layout for differential lines like RS-485 or CAN, eliminates risk of reverse installation, and avoids the need for dual unidirectional devices - reducing BOM count and PCB area versus discrete anode/cathode solutions.

What is the thermal resistance of the SM6T10CA-M3/52, and how does it impact power dissipation?

The SM6T10CA-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads. At its rated 5.0 W steady-state power dissipation, this results in ~500 °C temperature rise - confirming that the 5.0 W rating applies only with significant board-level heatsinking. In practice, the device is intended for transient (not continuous) power handling, with 600 W applicable only for short-duration pulses.

Does the SM6T10CA-M3/52 require special PCB layout considerations beyond standard SMB footprints?

Yes - optimal surge performance requires adherence to Vishay's recommended mounting pad layout: 5.0 mm × 5.0 mm copper areas per terminal to achieve specified 600 W pulse rating and thermal derating. Smaller pads increase RθJA and reduce IPPM capability. Additionally, minimize trace length between the SM6T10CA-M3/52 and protected node to reduce inductance, preserving its <1 ns response time and preventing voltage overshoot during fast transients.