STMicroelectronics SM6T200CA

Overview

SM6T200CA from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode in SMB package, designed for IEC 61000-4-2 ESD protection (30 kV air/contact) and IEC 61000-4-4 surge immunity (4 kV level 4). It features 200 V standoff voltage (VRM), 274 V clamping voltage at 11.3 A (10/1000 µs), and 2.2 Ω dynamic resistance. Used to protect power rails and signal lines in industrial power supplies and telecom interfaces.

For engineers reviewing the SM6T200CA datasheet, SM6T200CA pinout, SM6T200CA application, or SM6T200CA equivalent, key selection criteria include bidirectional clamping behavior, 200 V VRM matching system bus voltage, low leakage (<0.2 µA at 25 °C), high junction temperature rating (150 °C), and SMB footprint compatibility with IPC7531 layout.

Technical Context

This TVS diode employs planar silicon technology to achieve stable breakdown characteristics across temperature (αT = 10.8 × 10⁻⁴/°C) and low leakage current up to 85 °C. Its bidirectional architecture enables symmetrical clamping on AC-coupled or floating lines without polarity constraints.

Clamping performance is defined by VCL = VBR(max) + RD × IPP, where measured RD = 2.2 Ω supports predictable voltage limiting during 10/1000 µs transients up to 11.3 A. The device sustains 350 W peak pulse power at Tj = 150 °C per Figure 3, confirming thermal robustness in high-ambient environments.

Key Specifications

Pinout & Package

The SM6T200CA is housed in an SMB (DO-214AA) surface-mount package with matte tin-plated leads compliant with J-STD-002 and MIL-STD-750 method 2026. Dimensions: 3.3–3.95 mm length × 5.1–5.6 mm width × 2.0–2.45 mm height (JEDEC MO-136AC).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional TVS diode applications.

Compared with SMBJ200CA and P6SMB200CA, SM6T200CA delivers superior clamping accuracy (274 V vs. ≥290 V), extended thermal capability (150 °C vs. 125 °C), and UL497B certification-making it optimal for industrial and safety-compliant power systems requiring guaranteed surge suppression margins.

Availability

SM6T200CA is available at Aetrix Electronics and suitable for industrial power supplies, telecom interface protection, automotive body control modules, and renewable energy inverter monitoring requiring stable component supply and full compliance traceability.

Supply support for SM6T200CA 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, analog, MEMS, and microcontrollers for industrial, automotive, and consumer markets.

The SM6T series belongs to ST's transient protection portfolio, engineered specifically for high-reliability ESD and surge suppression in harsh environments where low leakage, thermal stability, and regulatory certification are mandatory.

FAQ

What is the maximum peak pulse current the SM6T200CA can handle?

The SM6T200CA sustains 11.3 A under 10/1000 µs waveform and 353 A under 8/20 µs waveform, as confirmed in Table 2 of DS0684 Rev 15. These values correspond to its 600 W and 4 kW peak power ratings respectively, with clamping voltage rising predictably per VCL = VBR + RD × IPP.

Does SM6T200CA require orientation during PCB placement?

No. As a bidirectional TVS diode, SM6T200CA has symmetrical electrical characteristics across both terminals. The cathode band marking is retained for consistency with unidirectional variants but does not affect functionality-either orientation provides identical clamping performance.

How does SM6T200CA perform at elevated temperatures?

At 150 °C junction temperature, SM6T200CA maintains 350 W peak pulse power (Figure 3) and exhibits predictable VBR and VCL drift using αT = 10.8 × 10⁻⁴/°C. Leakage rises to 1 µA at 85 °C (Figure 9), remaining well below 10 µA even at maximum rated temperature.

Is SM6T200CA compliant with RoHS and halogen-free standards?

Yes. Per DS0684 Rev 15 Section 2, SM6T200CA is offered in ST's ECOPACK2 grade, meeting RoHS Directive 2011/65/EU and halogen-free requirements (≤900 ppm bromine, ≤900 ppm chlorine). Compliance documentation is available via ST's quality portal.