Signal Relays, Up to 2 Amps

Image	Part Number	Description / PDF	Quantity	Rfq
	2823777 Phoenix Contact	RELAY GP SPST 500MA 24VAC/DC	0
	2826473 Phoenix Contact	RELAY GEN PUR	0
	2967413 Phoenix Contact	RELAY GP SPST 50MA 230VAC/DC	0
	2960106 Phoenix Contact	RELAY GEN PURPOSE 4PDT 2A 220VDC	0
	2940126 Phoenix Contact	RELAY GEN PURP SPST 500MA 24VDC	0
	2829470 Phoenix Contact	RELAY GEN PUR	0
	2987150 Phoenix Contact	PLC-RSP-110UC/21-21AU/RW	0
	2960397 Phoenix Contact	RELAY GEN PURPOSE DPDT 2A 120VAC	0
	2829797 Phoenix Contact	RELAY GEN PURP SPDT 500MA 120VAC	0
	2960012 Phoenix Contact	RELAY GEN PURPOSE DPDT 2A 48VDC	0
	2960070 Phoenix Contact	RELAY GEN PURPOSE 4PDT 2A 48VDC	0
	2953948 Phoenix Contact	RELAY GEN PURPOSE	0
	2960041 Phoenix Contact	RELAY GEN PURPOSE DPDT 2A 24VAC	0
	2899316 Phoenix Contact	RELAY GEN PURPOSE 4PDT 2A 110VDC	0
	2827414 Phoenix Contact	RELAY GEN PUR	0
	2966566 Phoenix Contact	RELAY GEN PURPOS SPDT 50MA 48VDC	0
	2967374 Phoenix Contact	RELAY GEN PURPOS SPST 50MA 24VDC	0
	2980775 Phoenix Contact	RELAY GENERAL PURPOSE DPDT 50MA	0
	2900773 Phoenix Contact	TERM BLOCK	0
	2968001 Phoenix Contact	RELAY GP DPDT 50MA 230VAC/DC	0

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.