Accessories

Part Number	Description / PDF	Quantity
RLY9204 NTE Electronics, Inc.	BOX LUG FOR RLY400 SERIES	95
R95-003 NTE Electronics, Inc.	RELAY-HOLD DOWN SPRING	143
R95-021 NTE Electronics, Inc.	RELAY-HOLD DOWN SPRING	249
RLY9202 NTE Electronics, Inc.	LUG BOX TYPE FOR RLY600	21
R95-184 NTE Electronics, Inc.	DUST COVER FOR RS3 SERIES	15
RLY9201 NTE Electronics, Inc.	DUAL .250 IN QC TERMINALS	0
RLY9011 NTE Electronics, Inc.	RELAY-HOLD DOWN SPRING	1768
R95-020 NTE Electronics, Inc.	RELAY-HOLD DOWN SPRING	103
RLY9010 NTE Electronics, Inc.	RELAY-HOLD DOWN SPRING	35
R95-001 NTE Electronics, Inc.	RELAY- HOLD DOWN SPRING	2408
RLY9166 NTE Electronics, Inc.	DUST COVER FOR RLY16/17	374
RLY9012 NTE Electronics, Inc.	HOLD DWN/EJECTOR	301
RLY9009 NTE Electronics, Inc.	RELAY HOLD DOWN SPRING	876
RLY9190 NTE Electronics, Inc.	AUXILIARY SWITCH QC TERMS	73
R95-004 NTE Electronics, Inc.	RELAY-HOLD DOWN SPRING	449
RLY9206 NTE Electronics, Inc.	AUX SWITCH KIT FOR RLY400	120

Accessories

1. Overview

Relays Accessories are components designed to enhance the functionality, protection, and integration of electromagnetic relays in electrical systems. These accessories include mechanical supports, protective enclosures, contact modules, and signal interfaces. In modern technology, they play a critical role in ensuring reliability, safety, and adaptability of relay-based control systems across industries such as automation, energy, and transportation.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Protective Covers	Dust/waterproof enclosures (IP65-IP68), corrosion resistance	Outdoor power distribution cabinets
Mounting Bases	Quick-install brackets, DIN rail compatibility	Industrial control panels
Contact Modules	Multi-pole expansion, arc suppression design	High-current motor controllers
Drive Modules	DC/AC voltage conversion, coil suppression circuits	PLC output stage amplification
Signal Converters	Voltage/frequency isolation, optocoupler integration	Railway signaling systems

3. Structure and Composition

A typical relay accessory combines mechanical and electrical components:

Mechanical Structure: Injection-molded thermoplastic housing (e.g., PA66), metal mounting brackets, vibration-damping gaskets
Electrical Components: Silver-alloy contact plates, PCB-mounted transient voltage suppressors, thermal insulating layers
Interface Design: Standardized pin layouts (e.g., Eurocard 160x100mm), screwless terminal blocks (0.2-4mm wire compatibility)

4. Key Technical Specifications

Parameter	Value Range	Importance
Insulation Resistance	100M -10G	Ensures dielectric safety
Rated Voltage	12VDC-600VAC	Determines application scope
Contact Resistance	5-50m	Affects power efficiency
Operating Temperature	-40 C to +125 C	Environmental adaptability
IP Rating	IP20-IP69K	Protection level selection
Electrical Life	10,000-100,000 cycles	System longevity

5. Application Fields

Industrial Automation: PLC control cabinets, CNC machine relays
Power Systems: Transformer protection relays, grid monitoring equipment
Transportation: Train control systems, EV battery management
Consumer Electronics: Smart home relay modules, washing machine controllers
Medical Equipment: Patient monitoring systems, MRI machine relays

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
Omron	MY2N-SR-DC12V	High-vibration resistance, LED status indicator
Schneider Electric	RXM4ABBD	Modular design, thermal overload protection
Siemens	3RT1025-1AP00	Plug-in terminal blocks, 3-phase control
Panasonic	JS1-12VDC	Miniature size (15.7x38mm), low power consumption
TE Connectivity	RT114112	Automotive-grade, AEC-Q100 certified

7. Selection Guidelines

Key considerations for selection include:

Environmental Conditions: Temperature extremes, humidity, and vibration levels
Load Requirements: Voltage/current ratings with 20% safety margin
Installation Method: PCB mount, panel mount, or DIN rail compatibility
Reliability Needs: MTBF (Mean Time Between Failures) >100,000 hours
System Compatibility: Matching coil voltage and contact configuration
Cost-Performance Ratio: Balancing durability and budget constraints

8. Industry Development Trends

Key trends shaping the future of relay accessories include:

Smart Integration: IoT-enabled accessories with embedded sensors for condition monitoring
Miniaturization: 30% size reduction achieved through advanced materials (e.g., LCP plastics)
Environmental Compliance: RoHS/REACH-compliant coatings and halogen-free materials
Modular Design: Interchangeable units for rapid system reconfiguration
High-Reliability Applications: Growth in aerospace and EV charging station accessories
Wireless Connectivity: Bluetooth-enabled relay modules for remote control systems