Accessories

Part Number	Description / PDF	Quantity
178.6125.0002 Wickmann / Littelfuse	FUSEHOLDER COVER FOR FH2 ATO	0
MS7H1500C Wickmann / Littelfuse	INDICATOR SWITCH SQUARE BODY 150	27
178.6116.1002 Wickmann / Littelfuse	FUSE CONTACT DFK 5.5/1.0MM2 TIN	0
913-068 Wickmann / Littelfuse	FUSE GAUGE TERM FEMALE 10AWG	0
03420012HX040 Wickmann / Littelfuse	FUSE HOLDER ACS 3AG KNOB	0
09050023H Wickmann / Littelfuse	FUSE LOCKWASHER ACS	2450
01520900H Wickmann / Littelfuse	COVER FOR MAXIHOLDER 152001	0
DSPL0001Z Wickmann / Littelfuse	ACS 600V COVER PULLER 30A 2 POLE	1782
09010134H Wickmann / Littelfuse	FUSE O-RING ACS	90
LRU263R Wickmann / Littelfuse	FUSE REDUCER CLASS R 60 TO 30A	102888
913-071 Wickmann / Littelfuse	TERMINAL SPRING GAUGE #14 16	11000
09030012H Wickmann / Littelfuse	FUSE NUT ACS	107
876-199 Wickmann / Littelfuse	ZCASE SINGLE FUSE TERMINAL ASSM	178
85600001009 Wickmann / Littelfuse	CAP FOR 5X20MM FUSE IP54 SLOTTED	252
298907-040 Wickmann / Littelfuse	ACS MEGAHOLDER COVER SEALED	131280
00970024M Wickmann / Littelfuse	FUSE EXTRACTOR MINI ATO 297	1680
913-070 Wickmann / Littelfuse	TERMINAL SPRING GAUGE #18 20	0
868-095 Wickmann / Littelfuse	WIRESEAL 14-12GA F/FUSEHLDR BLUE	0
65900000009 Wickmann / Littelfuse	COVER FUSE TRANSPRNT FOR 656/658	10128
02981028HXFCC Wickmann / Littelfuse	COVER FOR FLEX MEGA HOLDER	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.