Vishay General Semiconductor - Diodes Division P4SMA220A-M3/61

Overview

P4SMA220A-M3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 220 V breakdown voltage (V_BR = 209–231 V at I_T = 1.0 mA), 185 V stand-off voltage (V_WM), and 328 A peak pulse current (I_PPM) under 10/1000 µs waveform. It delivers 400 W peak pulse power capability and clamps transients to ≤328 V, protecting MOSFETs and ICs in industrial power supplies and sensor interfaces.

For engineers reviewing the P4SMA220A-M3/61 datasheet, P4SMA220A-M3/61 pinout, P4SMA220A-M3/61 application, or P4SMA220A-M3/61 equivalent, this device serves as a halogen-free, RoHS-compliant TVS for high-voltage transient suppression where clamping voltage, low leakage (<1.0 µA at V_WM), and AEC-Q101 qualification readiness are critical selection criteria.

Technical Context

This unidirectional TVS operates with a glass-passivated junction and exhibits fast response time (<1 ns), low incremental surge resistance, and excellent clamping ratio (V_C/V_BR ≈ 1.42). Its thermal resistance is R_θJA = 120 °C/W and R_θJL = 30 °C/W, enabling reliable operation up to T_J = 150 °C.

The device complies with MSL level 1 per J-STD-020 (peak reflow temperature 260 °C), features matte tin-plated leads solderable per J-STD-002, and meets UL 94 V-0 flammability rating. Polarity is marked by a cathode band on the SMA package body.

Key Specifications

Pinout & Package

Package: SMA (DO-214AC), surface-mount, low-profile plastic case with UL 94 V-0 rating. Cathode indicated by a single band on the body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ220A and 1.5SMC220A, the P4SMA220A-M3/61 offers halogen-free construction and lower leakage-critical for battery-backed systems-while maintaining identical electrical performance and SMA compatibility, making it ideal for RoHS- and REACH-sensitive industrial deployments.

Availability

P4SMA220A-M3/61 is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, telecom DC feeder systems, and renewable energy inverter DC links requiring stable component supply with halogen-free compliance and AEC-Q101 qualification readiness.

Supply support for P4SMA220A-M3/61 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.

The P4SMA Series targets high-voltage transient suppression in space-constrained surface-mount applications, designed to replace through-hole TVS diodes while delivering automotive-grade robustness and industrial thermal performance.

FAQ

What is the maximum clamping voltage of the P4SMA220A-M3/61 under a 10/1000 µs surge?

The P4SMA220A-M3/61 has a maximum clamping voltage (V_C) of 328 V when subjected to its rated peak pulse current of 328 A under the standard 10/1000 µs waveform. This value is measured at the device's specified I_PPM and ensures downstream components see no more than 328 V during transient events. The P4SMA220A-M3/61 maintains this clamping performance across its full operating temperature range and is validated per JEDEC test conditions.

Is the P4SMA220A-M3/61 suitable for automotive applications?

The P4SMA220A-M3/61 itself is not AEC-Q101 qualified, but Vishay offers the P4SMA220AHM3_A/H variant (same electrical specs, halogen-free, AEC-Q101 certified) for automotive use. The P4SMA220A-M3/61 shares identical packaging, thermal characteristics, and surge ratings-making it suitable for pre-qualification prototyping or non-safety-critical automotive subsystems where formal qualification is pending. Always verify final compliance with your Tier 1 requirements before release.

What does the "M3" suffix indicate in P4SMA220A-M3/61?

The "M3" suffix in P4SMA220A-M3/61 denotes halogen-free, RoHS-compliant construction per Vishay's material categorization standards. It confirms the molding compound contains no brominated flame retardants or chlorine-based additives, meeting IEC 61249-2-21 and JEDEC JS709C requirements. This distinguishes it from the "E3" (RoHS-compliant but not halogen-free) and "HM3" (halogen-free + AEC-Q101 qualified) variants.

How does the P4SMA220A-M3/61 compare to bidirectional TVS diodes like P4SMA220CA?

The P4SMA220A-M3/61 is unidirectional and intended for DC line protection where polarity is fixed (e.g., +220 V rail to ground), offering lower leakage (<1.0 µA) and tighter V_BR tolerance. In contrast, P4SMA220CA is bidirectional, suited for AC or floating signal lines, but exhibits higher leakage (up to 2.0 µA) and reduced V_BR range (209–220 V). Use P4SMA220A-M3/61 when polarity is known and leakage budget is tight; choose the CA version only for symmetrical surge protection needs.

What is the thermal resistance of the P4SMA220A-M3/61, and how does it affect PCB layout?

The P4SMA220A-M3/61 has a typical junction-to-ambient thermal resistance (R_θJA) of 120 °C/W and junction-to-lead (R_θJL) of 30 °C/W. To maintain T_J ≤ 150 °C under sustained 3.3 W power dissipation, PCB copper pads must follow Vishay's recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) layout per terminal. Reducing pad size increases R_θJA, risking thermal runaway during repetitive surges-so the P4SMA220A-M3/61 requires strict adherence to mounting guidelines for rated performance.