Schneider Electric RSL1AB4BD Slim Interface Relay

Technical Overview

Ultra-slim 5mm 24VDC interface relay with 1 C/O SPDT contact rated at 6A/250VAC. Features flat PCB-type pins, RT III protection, and 10M mechanical cycles.

Key Features

Ultra-compact 5 mm width saves up to 50% cabinet space compared to standard relays
Standard 1 changeover (1 C/O / SPDT) silver alloy (AgSnO2) contact
Operates with a 24 V DC control circuit voltage and draws only 0.17 W of power
Handles currents up to 6 A at 250 V AC (AC-1) or 24 V DC
Rugged mechanical durability of up to 10,000,000 switching cycles
Equipped with flat PCB-type pins for direct soldering or mounting into terminal sockets
RT III protection category (IP40 rating) prevents ingress of solid contaminants
High dielectric strength of 4,000 V AC between coil and contact

Technical Specification Matrix

Parameter	Value
Contacts Type and Composition	1 C/O
Control Circuit Voltage	24 V DC
Conventional Enclosed Thermal Current [Ithe]	6 A at -40...55 °C
Rated Operational Current [Ie]	6 A (AC-1/DC-1) conforming to IEC/UL
Average Coil Resistance	3390 Ohm
Maximum Switching Voltage	277 V
Minimum Switching Voltage	12 V
Maximum Switching Capacity	1500 VA (AC), 50 W (DC)
Minimum Switching Capacity	120 mW
Mechanical Durability	10,000,000 cycles
Electrical Durability	60,000 cycles at 6 A, 250 V AC-1
Dielectric Strength	1000 V AC (between contacts), 4000 V AC (between coil and contact)
IP Degree of Protection	IP40
Protection Category	RT III
Shape of Pin	Flat (PCB type)
Ambient Air Temperature for Operation	-40...55 °C
Physical Weight (kg)	0.01
Dimensions L x W x H (cm)	1.85 x 0.5 x 2.8

Industrial Applications

1. High-Density PLC Output Interface Isolation

In large industrial PLC control cabinets with high I/O density, standard relays occupy too much DIN rail space. Using the 5 mm ultra-slim RSL1AB4BD allows engineering teams to group dozens of interface relays in extremely tight configurations.

Problem Solved

Solves the cabinet spatial footprint problem while providing critical galvanic isolation (up to 4 kV) between sensitive low-voltage PLC semiconductor outputs and high-voltage field devices.

PLC InterfaceGalvanic IsolationHigh-Density CabinetDIN Rail SocketAgSnO2 Contacts

2. Direct PCB-Mount Relay for Embedded Control Boards

Designed with flat PCB-type pins, this relay can be directly soldered onto custom-made electronic controllers for HVAC, motor drives, or specialized machine automation.

Problem Solved

Eliminates the need for bulky external relay modules, allowing compact board layout with high vibration resistance (up to 5 gn in operation) and reliable 6 A power switching directly on-board.

PCB RelayDirect SolderHVAC ControlVibration ResistanceFlat Pins

3. Resistive and Low Inductive Load Switching in Building Automation

Building automation and lighting control systems require frequent switching of small actuators, solenoid valves, and LED drivers (resistive loads up to 1500 VA).

Problem Solved

With its AgSnO2 contacts, the relay handles high inrush currents without contact welding or premature oxidation, delivering an electrical lifetime of 60,000 cycles at full 6 A load under RT III protected conditions.

Building AutomationSolenoid Valve ControlResistive LoadsContact Welding PreventionRT III Protection