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Signal Relays, Up to 2 Amps

Image Part Number Description / PDF Quantity Rfq
8771420000

8771420000

Weidmuller

RELAY GEN PURPOSE SPDT 2A 24VDC

0
8771430000

8771430000

Weidmuller

RELAY GEN PURPOSE SPDT 2A 24VDC

13756
8016620000

8016620000

Weidmuller

RELAY GEN PURP SPST 500MA 24VDC

0
8019610000

8019610000

Weidmuller

RELAY GEN PURPOS SPST 500MA 5VDC

0
8008110000

8008110000

Weidmuller

RELAY GP SPST 500MA 24VAC/DC

0
8215620000

8215620000

Weidmuller

RELAY GEN PURP SPST 500MA 24VDC

0
8016610000

8016610000

Weidmuller

RELAY GP SPST 500MA 24VAC/DC

0
8008170000

8008170000

Weidmuller

RELAY GEN PURP SPST 500MA 24VDC

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

TypeFunctional CharacteristicsApplication Examples
Electromagnetic RelaysMechanical switching via electromagnetic coil, standard form factorIndustrial control panels, HVAC systems
Solid-State RelaysNo moving parts, zero-crossing switching, fast responseTemperature control systems, LED lighting
Reed RelaysHermetically sealed contacts, high-speed operationTelecom switching, test equipment
Time Delay RelaysProgrammable switching intervalsMachinery automation, motor starters
High-Frequency RelaysDesigned for RF/microwave signal pathsWireless 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

ParameterTypical ValueImportance
Rated Current1-2 A resistiveDetermines load capacity
Coil Voltage5-48 VDC nominalDictates control circuit design
Contact Resistance<50 m Impacts signal integrity
Insulation Resistance>100 M Safety isolation performance
Mechanical Life10-100 million operationsDurability indicator
Switching Speed5-15 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

ManufacturerProduct SeriesKey Features
OmronG5LE-14-DC55 mm spacing, 2 A rating
Phoenix ContactPSR-SCP-24UCPlug-in design, LED indicators
TE ConnectivityRTX-S-DC5VAutomotive qualified
Siemens3RT2025Modular 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.

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