Accessories

Part Number	Description / PDF	Quantity
901-148 Wickmann / Littelfuse	FUSE HARDWARE WASHER RUBBER	0
30090-4 Wickmann / Littelfuse	BRKT 4P ZN15	0
BB21 Wickmann / Littelfuse	BUSBAR TERMINAL	0
LRUJ21 Wickmann / Littelfuse	FUSE REDUCER CLASS J 200 TO 100	36
882-835-3 Wickmann / Littelfuse	FUSE BLOK BLT DWN 32V 500A CHASS	0
86099-5 Wickmann / Littelfuse	BUS BAR 5P	1280
880118 Wickmann / Littelfuse	BUSBAR 4 X 5/16-18 250A	130
913-008-R Wickmann / Littelfuse	CRIMP TERMINAL REVERSE REEL	0
LRU2662R Wickmann / Littelfuse	FUSE REDUCER CLASS R 600 TO 200A	25
0HBFA001CAPB Wickmann / Littelfuse	OUTPUT CAP 6-16 MM2 CABLE	0
912-200 Wickmann / Littelfuse	FUSE SPRING 0.026 GALV WIRE	0
3PH57P18MM Wickmann / Littelfuse	BUSBAR 3 PHASE 57 POLE 18X1009MM	0
901-002 Wickmann / Littelfuse	WASHER RUBBER	0
BB19 Wickmann / Littelfuse	BUSBAR TERMINAL	88
880195400 Wickmann / Littelfuse	PDM 2 POSITION MARKET	1677
03540522Z Wickmann / Littelfuse	FUSE ACS STORAGE DRAWER	0
08680906TXN Wickmann / Littelfuse	WIRE SEALS FOR 152003.	1600
3PH21P18MM Wickmann / Littelfuse	BUSBAR 3 PHASE 21 POLE 18MM	47
165.0020.0002 Wickmann / Littelfuse	PULLER TRI PULLER	1000
02400105Z Wickmann / Littelfuse	RESISTOR ATO 10K OHM 0.25W	0

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.