Siemens Solid-state contactor, 1-phase, 25A Part number 3RF2330-1DA44

Product Overview

The Siemens 3RF2330-1DA44 is a single-phase solid-state contactor from the SIRIUS 3RF2 family. It is designed for switching AC loads with electronic control, offering a compact, reliable, maintenance-free alternative to electromechanical contactors. Suitable for resistive or lightly inductive loads, it supports AC 51 duty up to 30 A at 48–460 V AC (50/60 Hz), with control supply 4–30 V DC. Its design ensures short-circuit safety when used with appropriate upstream protection devices.

Key Features

• Solid-state contactor — SIRIUS 3RF2 series (1-phase)
• AC load switching: 48–460 V AC, 30 A (AC-51), ideal for resistive or low-inductive loads
• Control input: 4–30 V DC control voltage
• Short-circuit safe when protected by B-type miniature circuit breaker (MCB)
• Compact single-pole format — space-efficient for control panels or switchgear
• Low maintenance, long operational life — no mechanical contacts, silent switching
• Insulation voltage: 600 V; surge resistance: 6 kV; protection class IP20
• Shock resistance and vibration tolerance per industrial standards

Technical Specifications

• Article Number: 3RF2330-1DA44
• Product Type: Solid-state contactor (single-phase / 1-pole)
• Main Circuit Voltage Range: 48 … 460 V AC, 50/60 Hz
• Rated Operational Current (AC-51): 30 A
• Control Voltage (DC): 4 … 30 V
• Minimum Control Voltage: 4 V DC (ON detection threshold)
• Insulation Voltage: 600 V AC
• Surge Voltage Withstand: 6 kV
• Protection Rating: IP20
• Operational Conditions: Rated for 40 °C ambient temperature without derating
• Power Loss (at rated current): 33 W (hot state)
• Number of Poles: 1 (single-phase switching)
• NO Contacts (main): 1 (solid-state switching element)
• Load Types: Resistive and low-inductive (e.g. heaters, lighting, resistive loads)
• Mounting / Terminals: Screw-terminal connections; typical PCB or DIN-rail / panel mount compatible when in enclosure

Compliance & Standards

• Belongs to Siemens SIRIUS 3RF2 solid-state contactor family
• Short-circuit resistant configuration when used with B-type MCB per specification
• Rated for industrial shock, surge and pollution class 3 environments

Applications

Ideal for switching resistive or lightly inductive AC loads — such as heaters, lighting circuits, resistive loads, or control circuits — especially where silent, maintenance-free switching is required. Suitable for applications where frequent switching, long service life, or reduced electromagnetic arc wear is beneficial. Because of its compact size and flexible control voltage, it is also useful in control panels, automation cabinets, factory-build control systems, and building automation systems.