Broadcom Limited ASSR-1410-003E

Overview

ASSR-1410-003E from Broadcom is a single-channel, normally-off, Form A solid-state relay (Photo MOSFET) in a 4-pin SO package, featuring 60 V output withstand voltage, 0.6 A DC output current rating, 0.2 Ω typical on-resistance at 25°C, and 3750 Vrms input-output isolation. It replaces electromechanical relays in low-power AC/DC signal switching applications requiring high reliability and zero contact bounce.

For engineers reviewing the ASSR-1410-003E datasheet, pinout, applications, or equivalent options, key selection criteria include its SO-4 surface-mount footprint, 3 mA minimum LED turn-on current, 0.8 V maximum LED turn-off voltage, -40°C to +85°C operating range, and UL1577/CSA safety certification.

Technical Context

The ASSR-1410-003E integrates an AlGaAs infrared LED optically coupled to a high-speed photovoltaic diode array and driver circuit that controls two discrete high-voltage MOSFETs. Its output stage operates as a bidirectional SPST switch with no moving parts, enabling silent, wear-free operation.

It delivers fast switching performance (0.25 ms typical T_ON, 0.04 ms typical T_OFF) and high transient immunity (>1 kV/μs dV/dt), supported by 0.4 pF input-output capacitance and 10¹² Ω isolation resistance - critical for noise-sensitive telecom and medical signal routing.

Key Specifications

Pinout & Package

ASSR-1410-003E uses a 4-pin Small Outline (SO-4) surface-mount package with gull-wing leads, 1.27 mm pitch, and JEDEC MS-012AC outline. Package dimensions: 4.70 mm × 3.90 mm × 1.78 mm max height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLP3545A and VO1263BA, the ASSR-1410-003E offers superior current handling (0.6 A vs. ≤0.4 A), lowest on-resistance (0.2 Ω), fastest switching (0.25 ms T_ON), and compact SO-4 footprint - making it optimal for space-constrained, high-reliability signal switching where thermal and timing margins are tight.

Availability

ASSR-1410-003E is available at Aetrix Electronics and suitable for telecom signal routing, industrial PLC I/O modules, and medical diagnostic equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for ASSR-1410-003E 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

Broadcom Inc. is a global semiconductor leader specializing in infrastructure software, networking, and optoelectronic components for enterprise, industrial, and communications markets.

The ASSR-14XX series was designed as general-purpose, Form A solid-state relays to replace electromechanical relays in low-power signal and load switching - prioritizing reliability, speed, and safety-certified isolation over cost-driven commodity specs.

FAQ

What is the minimum input current required to activate the ASSR-1410-003E?

The ASSR-1410-003E turns on with a minimum input current of 3 mA through its internal LED. For guaranteed operation across the full –40°C to +85°C temperature range, Broadcom recommends driving the LED with 5 mA. This ensures reliable switching even under worst-case forward voltage drift and aging effects. The ASSR-1410-003E does not require external current-limiting resistors if driven from a properly configured constant-current source.

Can the ASSR-1410-003E switch AC signals, and what are the voltage limitations?

Yes, the ASSR-1410-003E supports bidirectional AC signal switching due to its MOSFET-based output stage. Its output withstand voltage is rated at ±60 V, meaning it can safely block up to 60 V peak AC (e.g., 42.4 V RMS sine wave). However, sustained AC operation must remain within the 0.6 A average current and thermal limits shown in Figure 1. Exceeding these causes R_ON rise and potential thermal runaway - the ASSR-1410-003E is not rated for continuous AC mains switching.

What is the isolation voltage rating of the ASSR-1410-003E, and which safety standards does it meet?

ASSR-1410-003E provides 3750 Vrms input-to-output isolation for 1 minute per UL 1577 and is CSA component accepted under Notice #5. This rating applies to the entire device - pins 1 and 2 shorted as one side, pins 3 and 4 shorted as the other. It satisfies reinforced insulation requirements for functional safety in Class I medical and industrial equipment. The ASSR-1410-003E is not rated for basic or double insulation per IEC 60747-5-2 without system-level validation.

How does the on-resistance of the ASSR-1410-003E change with temperature and load current?

The ASSR-1410-003E has a typical on-resistance of 0.2 Ω at 25°C and 0.6 A pulsed current. As junction temperature rises, R_ON increases - reaching ~0.35 Ω at 85°C (per Figure 8). Under DC conditions, self-heating further elevates R_ON; the steady-state value (R_ss) must be calculated using R_ss = P_O(max) / I_O(max)² from derating curves. The ASSR-1410-003E's low R_ON minimizes power loss and thermal stress in precision analog and low-voltage digital paths.

Is the ASSR-1410-003E suitable for automotive applications?

No, the ASSR-1410-003E is not qualified for automotive use. Broadcom explicitly states it is not AEC-Q100 qualified and does not recommend it for automotive or aerospace environments. Its operating temperature range (–40°C to +85°C) falls short of automotive Grade 2 (–40°C to +105°C) requirements, and it lacks the extended lifetime validation, PPAP documentation, and failure-in-time (FIT) data required for automotive ECUs. Use only in industrial, telecom, or medical applications per the datasheet cautions.