Accessories

Part Number	Description / PDF	Quantity
4430.3496 Schurter	COVER CIRCUIT BRKR 2POLE	86
0031.1811 Schurter	FUSECARRIER FEU GRIP BODY 5X20MM	69
0913073001 Wickmann / Littelfuse	POWER RELAY TERMINAL 5.37MM	0
03453LF1HX020 Wickmann / Littelfuse	FUSEHOLDER KNOB 3AG FINGERGRIP	283
0031.2320 Schurter	CARRIER FUSE FOR FUL 6.3X32MM	588300
6720000226 Weidmuller	SUPPLY TERMINAL FOR 6720000227	2323
MSVGW45-14-4 Carlo Gavazzi	FOR 4 GMS-32S/H	15
GMBBPINCAP Carlo Gavazzi	PIN CAP ALL GMB BUSBARS	10
SHT-24 American Electrical, Inc.	SHUNT TRIP MOD 24 VAC/DC 24 MA	0
0031.3560 Schurter	FUSEHOLDER CAP FEF 5X20MM	69
4400.0425 Schurter	NUT CIRCUIT BRKR	0
ALO-R American Electrical, Inc.	ALARM SWITCH LEFT MOUNTING	0
901-184 Wickmann / Littelfuse	O RING BODY	0
GMBBENDCAP Carlo Gavazzi	END CAP ALL GMB BUSBARS	1043
8394 Wickmann / Littelfuse	KEY CODE 8394	0
4430.0835 Schurter	SCREW COVER CIRCUIT BRKR 2POLE	220
03452LF1HX020 Wickmann / Littelfuse	FUSEHOLDER KNOB 2AG FINGERGRIP	0
BK/HTC-150M PowerStor (Eaton)	ACCY COVER SNAP-ON FOR HTC-15M	1356
0913072001 Wickmann / Littelfuse	SPRINGTERM. ATO CB 3.32-5.37M	0
BLC-09-GTC OptiFuse	COVER FOR FUSE BLOCK BLC-09-GT	110

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.