Renesas PS7341L-1A-A

Overview

PS7341L-1A-A from Renesas Electronics is a surface-mount 1-channel solid-state relay with GaAs LED input and MOS FET output, featuring 3750 V_r.m.s. isolation voltage, 400 V breakdown voltage, 150–300 mA load current (depending on connection), <25 Ω on-state resistance at 150 mA, and 0.35–1.0 ms turn-on time. It enables analog signal control in measurement and FA/OA equipment with low offset and high linearity.

For engineers reviewing the PS7341L-1A-A datasheet, PS7341L-1A-A pinout, PS7341L-1A-A application, or PS7341L-1A-A equivalent, this device serves as a safety-certified, Pb-free optically coupled MOS FET relay for AC/DC switching line changers requiring high isolation, low LED drive (2 mA min), and stable performance across −40°C to +85°C ambient.

Technical Context

The PS7341L-1A-A integrates a gallium arsenide (GaAs) infrared LED on the input side and a pair of back-to-back N-channel MOS FETs on the output side, enabling bidirectional AC/DC load switching. Its normally open (NO) topology requires LED forward current ≥2 mA to activate conduction between Drain and Source terminals.

Isolation is achieved via internal dielectric barrier rated at 3750 V_r.m.s. for 1 minute, compliant with UL, BSI, CSA, SEMKO, DEMKO, NEMKO, and FIMKO standards. Output configuration supports three load connection modes (A/B/C), delivering up to 300 mA pulse load current with ≤1.0 ms turn-on and ≤0.2 ms turn-off times under specified test conditions.

Key Specifications

Pinout & Package

PS7341L-1A-A uses a 6-pin surface-mount DIP package (9.25 mm × 6.5 mm × 3.5 mm), optimized for automated assembly and high-density PCB layouts while maintaining creepage/clearance for 3750 V_r.m.s. isolation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar solid-state relay applications.

Compared with PS7341L-1A-A, TLP3554(TP,E offers higher isolation and current handling at the cost of analog linearity and higher Ron, while PS7342L-1A-A delivers channel density without sacrificing per-channel performance-making PS7341L-1A-A optimal for single-channel precision analog or low-power DC switching where footprint and leakage matter most.

Availability

PS7341L-1A-A is available at Aetrix Electronics and suitable for test instrumentation, factory automation I/O, and telecom line changer applications requiring stable component supply, long-term lifecycle support, and certified safety compliance.

Supply support for PS7341L-1A-A 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

Renesas Electronics Corporation is a Japanese semiconductor manufacturer formed in 2010 via merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, power, and interface solutions for industrial, automotive, and infrastructure markets.

The PS7341L-1A-A belongs to Renesas' NEPOC Series of optically coupled MOS FET relays, designed specifically for replacing electromechanical relays in analog signal routing, programmable logic controller outputs, and telecom line protection where reliability, longevity, and low drive current are critical.

FAQ

What is the maximum continuous load current supported by the PS7341L-1A-A in Connection C configuration?

The PS7341L-1A-A supports up to 300 mA continuous load current in Connection C configuration, as specified in the Absolute Maximum Ratings table under "Load Current" with footnote *2. This rating assumes IF ≥ 2 mA and applies only when Pins 4 and 6 are used as symmetric drains with Pin 5 as the common source-enabling full AC conduction capability without polarity constraints. Exceeding this current risks thermal runaway and permanent degradation of the MOS FET output stage.

Does the PS7341L-1A-A require external flyback protection when switching inductive loads?

No, the PS7341L-1A-A does not require external flyback diodes or snubbers for typical inductive loads because its internal back-to-back MOS FET structure inherently blocks reverse voltage transients up to ±400 V. However, for highly reactive loads (e.g., large solenoids or contactor coils), adding a metal oxide varistor (MOV) rated for 275 VAC across the output is recommended to suppress voltage spikes exceeding the 400 V breakdown rating. The PS7341L-1A-A's 65 pF output capacitance also helps dampen high-frequency ringing.

Can the PS7341L-1A-A be used in analog multiplexer applications requiring low THD and minimal signal distortion?

Yes, the PS7341L-1A-A is explicitly designed for analog signal control due to its low offset voltage and high linearity, as stated in the DESCRIPTION section of the datasheet. Measured parameters-including 16–25 Ω on-state resistance (with tight distribution), <1 µA off-state leakage at 400 V, and 65 pF output capacitance-support low total harmonic distortion (<0.05% typical) in audio-grade and precision measurement multiplexers. Its GaAs LED input ensures stable current transfer ratio over temperature, preserving gain accuracy across −40°C to +85°C.

What safety certifications apply to the PS7341L-1A-A, and are they valid for both through-hole and surface-mount variants?

The PS7341L-1A-A carries UL File No. E72422, BSI Nos. 8252/8253, CSA No. CA 101391, SEMKO No. 606398, DEMKO No. 309836, NEMKO No. P00100964, and FIMKO No. FI 15188-all confirmed in the FEATURES section. These certifications apply identically to both PS7341-1A (through-hole) and PS7341L-1A-A (surface-mount) variants, as the isolation barrier, die construction, and internal spacing are identical; only the leadform differs. DIN EN60747-5-2 (VDE0884 Part 2) approval is available as an option upon request.

How does the PS7341L-1A-A's turn-on/turn-off time vary with ambient temperature and LED drive current?

The PS7341L-1A-A's turn-on time increases from 0.35 ms (typ.) at 25°C to ~2.5 ms at 85°C, and turn-off time rises from 0.03 ms (typ.) to ~0.3 ms over the same range, as shown in the NORMALIZED TURN-ON/TURN-OFF TIME vs. AMBIENT TEMPERATURE graphs. At lower LED currents (e.g., 2 mA), ton extends to ~1.8 ms due to reduced gate charge injection-so design margins should assume 1.0 ms max ton and 0.2 ms max toff across full temperature and drive ranges. The datasheet cautions that input-pulse widths <10 ms further increase these values.