Accessories

Part Number	Description / PDF	Quantity
178.6125.0001 Wickmann / Littelfuse	HOLDER COVER FOR FH2 (ATO)	0
X3131-WB0000 E-T-A	BLACK ROCKER ACTUATOR NO LEGEND	61
AL American Electrical, Inc.	ALARM SWITCH 1NO 1 NC CONTACTS	0
12-J20-20 E-T-A	CIRCUIT BREAKER SOCKET	299
0031.2221 Schurter	CARRIER FUSE 5X20MM SLOT PNL MNT	19
ALO-T American Electrical, Inc.	ALARM SWITCH RIGHT MOUNTING	0
4527C Keystone Electronics Corp.	COVER ONLY FOR #4527 FUSE HOLDER	1800424900
3101.7021 Schurter	FPG1/2/6 CARRIER 5X20 IP 67	150
09130654Z Wickmann / Littelfuse	TERMINAL FOR M 1000 DIN 46234	0
67101972 Weidmuller	CIRCUIT BRKR BUS BAR 2POLE 1M	26
1100-SRXF c3controls	SHNTTRP MOD S.MTD 230VAC 50/60HZ	200
LHR0CA Wickmann / Littelfuse	FUSE MOUNTING CLIP U-SHAPE LHR	0
UVT-O-24 American Electrical, Inc.	UNDERVOLTAGE RELEASE MOD 24	0
18/25CAP3P Altech Corporation	ENDCAP FOR 18/25SQMM BUSBAR 3 PH	152
6720000227 Weidmuller	BUXX BAR 1 METER SINGLE POLE	225
4430.136 Schurter	COLLAR CIRCUIT BRKR 2POLE	0
913-065 Wickmann / Littelfuse	TERMINAL STANDARD GAUGE #14 16	6404200
255.0899.4001 Wickmann / Littelfuse	INSULATION NUT W/ LOCKING HOOK	0
BK/FBM PowerStor (Eaton)	FUSEHOLDER	135800
3101.7012 Schurter	FPG1/2/6 CARRIER 5X20 IP 40	100

Accessories

1. Overview

Circuit protection device accessories are auxiliary components designed to enhance the functionality, safety, and reliability of electrical circuit protection systems. These accessories include mounting brackets, terminal blocks, indicator modules, and specialized connectors that work in conjunction with primary protection devices such as fuses, circuit breakers, and surge protectors. In modern electrical systems, they play a critical role in preventing equipment damage, reducing downtime, and ensuring compliance with safety standards across industries ranging from consumer electronics to industrial automation.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Fuse Holders	Provide secure mechanical support and electrical connection for fuses	Industrial control panels, power supplies
Circuit Breaker Accessories	Include trip units, auxiliary contacts, and arc suppression modules	Electrical distribution boards, HVAC systems
Surge Protection Modules	Mounting rails and thermal disconnectors for SPD devices	Data centers, telecommunication infrastructure
Terminal Blocks	Modular connectors for wire termination and signal routing	Machinery control cabinets, instrumentation systems
Indicators and Alarms	Visual/audio warning systems for fault detection	Automotive electronics, renewable energy systems

3. Structure and Components

Typical accessories feature a modular design with the following elements:

Enclosure: Flame-retardant thermoplastic (UL94 V-0 rated) for environmental protection
Contact Elements: Copper alloy or phosphor bronze with gold/silver plating for conductivity
Mechanical Fasteners: Zinc-plated steel or stainless steel mounting hardware
Thermal Management: Heat-resistant ceramics or polymer composites in high-current models
Interface Components: Spring-loaded terminals or screw-type connectors (IEC 60998 compliant)

4. Key Technical Specifications

Parameter	Description
Current Rating	0.5A to 630A depending on application (IEC 60898-1 standard)
Voltage Compatibility	24VDC to 1000VAC operational range
Short Circuit Withstand	50kA to 150kA interrupting capacity for industrial-grade models
Operating Temperature	-40 C to +120 C (UL 1449 standard compliance)
IP Rating	IP20 (basic protection) to IP67 (harsh environment models)
Material Flammability	UL94 V-0 or equivalent fire resistance rating

5. Application Fields

Power Distribution: Transformer stations, switchgear cabinets
Industrial Automation: PLC control systems, motor drives
Renewable Energy: Solar inverters, wind turbine control systems
Transportation: Electric vehicle charging stations, railway signaling
Telecommunications: Base transceiver stations, data center UPS systems

6. Leading Manufacturers and Products

Manufacturer	Representative Product
TE Connectivity	Kilovac EV200 power contactor accessories
Eaton	XLP molded case circuit breaker kits
Phoenix Contact	PTFIX-... series terminal blocks
Siemens	3VA molded case circuit breaker accessories
Littelfuse	SPA series surge protection accessories

7. Selection Guidelines

Key considerations for optimal selection:

Electrical Parameters: Match current/voltage ratings with system requirements
Environmental Factors: Consider temperature extremes, humidity, and vibration levels
Compatibility: Ensure mechanical and electrical interface alignment with primary devices
Maintenance Requirements: Choose modular designs for easy replacement in critical systems
Compliance Standards: Verify certifications (UL, CSA, IEC, RoHS) for regulatory compliance

8. Industry Trends Analysis

The market is evolving towards:

Smart Integration: Accessories with IoT-enabled monitoring capabilities (e.g., thermal sensors)
Miniaturization: 30% size reduction in industrial control accessories (2020-2025 CAGR)
Material Innovation: Graphene composites for improved thermal dissipation
Hybrid Solutions: Combined overcurrent + surge protection modules
Sustainability: RoHS-compliant materials and recyclable component design

According to MarketsandMarkets research, the global circuit protection accessories market is projected to grow at 6.8% CAGR through 2027, driven by EV infrastructure and renewable energy system demands.