Signal Relays, Up to 2 Amps

Part Number	Description / PDF	Quantity
2940087 Phoenix Contact	RELAY GEN PURPOS SPST 50MA 24VDC	1
2987286 Phoenix Contact	RELAY GEN PURPOS SPDT 10MA 60VDC	0
2900349 Phoenix Contact	RELAY GEN PURPOS DPDT 50MA 24VDC	0
2942399 Phoenix Contact	RELAY GEN PURPOSE SPST 2A 24VDC	4
2824190 Phoenix Contact	RELAY GEN PUR	0
2829551 Phoenix Contact	RELAY GP DPDT 500MA 24VAC/DC	0
2900338 Phoenix Contact	RELAY GEN PURPOS DPDT 50MA 24VDC	0
2980034 Phoenix Contact	RELAY GEN PURP SPDT 50MA 125VDC	0
2900343 Phoenix Contact	RELAY GP DPDT 50MA 230VAC/DC	0
2967303 Phoenix Contact	RELAY GEN PURPOS DPDT 50MA 60VDC	0
2900345 Phoenix Contact	RELAY GEN PURP DPDT 50MA 230VAC	0
2826486 Phoenix Contact	RELAY GEN PUR	0
2966333 Phoenix Contact	RELAY GP SPST 50MA 230VAC/DC	0
2967141 Phoenix Contact	RELAY GP DPDT 50MA 230VAC/DC	0
2900351 Phoenix Contact	RELAY GEN PURP DPDT 50MA 110VDC	0
2967442 Phoenix Contact	RELAY GEN PURPOS SPDT 50MA 12VDC	0
2966540 Phoenix Contact	RELAY GEN PURPOS SPDT 50MA 24VDC	0
2987024 Phoenix Contact	RELAY GEN PURPOS SPDT 50MA 24VDC	0
2826172 Phoenix Contact	RELAY GEN PUR	0
2944782 Phoenix Contact	RELAY GEN PURP SPST 2A 24VAC/DC	9

Signal Relays, Up to 2 Amps

1. Overview

Signal relays with ratings up to 2 amps are electromechanical or solid-state switching devices designed to control low-power electrical circuits. These components enable signal transmission isolation, circuit amplification, or switching automation in modern electronic systems. Their compact size and precise control capabilities make them essential in automation, telecommunications, and precision instrumentation systems.

2. Major Types and Functional Classification

Type	Functional Characteristics	Application Examples
Electromagnetic Relays	Mechanical switching via electromagnetic coil, standard form factor	Industrial control panels, HVAC systems
Solid-State Relays	No moving parts, zero-crossing switching, fast response	Temperature control systems, LED lighting
Reed Relays	Hermetically sealed contacts, high-speed operation	Telecom switching, test equipment
Time Delay Relays	Programmable switching intervals	Machinery automation, motor starters
High-Frequency Relays	Designed for RF/microwave signal paths	Wireless infrastructure, radar systems

3. Structure and Components

Typical construction includes:

Coil assembly (copper winding on bobbin)
Contact system (fixed and movable contacts)
Insulation housing (flame-retardant polymer)
Magnetic circuit (iron core and yoke)
Terminal system (PCB pins or screw terminals)

Advanced models incorporate EMI suppression circuits and LED status indicators.

4. Key Technical Parameters

Parameter	Typical Value	Importance
Rated Current	1-2 A resistive	Determines load capacity
Coil Voltage	5-48 VDC nominal	Dictates control circuit design
Contact Resistance	<50 m	Impacts signal integrity
Insulation Resistance	>100 M	Safety isolation performance
Mechanical Life	10-100 million operations	Durability indicator
Switching Speed	5-15 ms (EMR), <1 ms (SSR)	System response time

5. Application Fields

Industrial automation (PLCs, sensor interfaces)
Telecom infrastructure (signal routing switches)
Medical equipment (diagnostic device controls)
Smart home systems (HVAC thermostats)
Test & measurement (ATE machine interfaces)

6. Leading Manufacturers and Products

Manufacturer	Product Series	Key Features
Omron	G5LE-14-DC5	5 mm spacing, 2 A rating
Phoenix Contact	PSR-SCP-24UC	Plug-in design, LED indicators
TE Connectivity	RTX-S-DC5V	Automotive qualified
Siemens	3RT2025	Modular mounting system

7. Selection Recommendations

Key considerations:

Load type (resistive/inductive)
Environmental conditions (temperature/humidity)
Required make/break cycles
Regulatory certifications (UL/CSA/IEC)
PCB footprint constraints

Example: For medical equipment, select RoHS-compliant reed relays with 1.5 A rating and reinforced insulation.

8. Industry Trends

Current developments include:

Transition to surface-mount solid-state alternatives
Integration with IoT-enabled monitoring systems
Nanocoating for harsh environment protection
Increased adoption of 1 Form C contacts
Miniaturization (sub-10 mm package development)

Market forecasts predict 5.2% CAGR through 2027 driven by industrial automation growth.