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CG4-A251-600-FS2 | Kraus & Naimer Blue Line Cam Switch
2-pole 4-position non-zero selector switch, rated 10A/440V AC/DC, central locking mounting, ideal for industrial control circuit switching
- Model Code Definition
| Code Segment | Description |
| CG4 | Product Series: CG compact cam switch, Size S00 |
| A251 | Contact Configuration: 2-pole 4-position without zero position, 60° switching step, rigid silver contact bridge |
| 600 | Operating Angle: 3×60° (total 180°), 4 positions (1-4) |
| FS2 | Mounting Type: Central locking, panel cutout 16/22mm, front protection grade IP66/IP67/IP69k |
- Main Technical Specifications
| Item | Specification |
| Brand | Kraus & Naimer (Austria Blue Line) |
| Type | Off-load tap switch / Uniselector |
| Pole & Position | 2 poles, 4 positions (no zero position) |
| Rated Insulation Voltage Ui | 440V AC/DC (IEC), 300V AC (UL) |
| Rated Continuous Current Iu/Ith | 10A (ambient 55°C, peak 60°C) |
| Rated Operational Current Ie | AC-15: 2.5A (220-240V), 1.5A (380-440V) |
| Rated Power | AC-3: 0.75kW (380-440V, 2P), 2.2kW (380-440V, 3P) |
| Switching Angle | 60° per step, total 180° |
| Mounting Method | Central locking (FS2), panel hole 16/22mm |
| Terminal Type | Screw terminal, tightening torque 0.4Nm (3.5lb-in) |
| Cable Size | Solid wire: 0.5-1.5mm²; Stranded wire: 0.75-1.5mm² (max 2.5mm² with cable lug) |
| Protection Degree | Front: IP66/IP67/IP69k, Rear: IP20 |
| Certifications | IEC 60947-3, EN 60947-3, VDE 0660 Part 107, UL 60947-4-1, UL 508 |
| Color | Grey / Black |
| Order No. | 703584 (Conrad), 9004257056231 (EAN/GTIN) |
- Full CG4 A2xx-600-FS2 Series List
| Model | Poles | Positions | Zero Position | Main Features |
| CG4-A201-600-FS2 | 2 | 2 | Yes | Basic type, 2-position with zero |
| CG4-A220-600-FS2 | 1 | 3 | No | 1-pole 3-position non-zero |
| CG4-A221-600-FS2 | 2 | 3 | No | 2-pole 3-position non-zero |
| CG4-A231-600-FS2 | 1 | 4 | No | 1-pole 4-position non-zero |
| CG4-A251-600-FS2 | 2 | 4 | No | 2-pole 4-position non-zero (current model) |
| CG4-A250-600-FS2 | 2 | 4 | No | Similar to A251, slight contact difference |
| CG4-A213-600-FS2 | 2 | 3 | Yes | 2-pole 3-position with zero, G251 handle |
- Equivalent & Replacement Models
| Replacement Type | Model | Brand | Remarks |
| Same Series Replacement | CG4-A250-600-FS2 | Kraus & Naimer | Different contact bridge design, fully function compatible |
| Same Brand Upgrade | CG4-A251-600-FT2 | Kraus & Naimer | Flange locking mounting, same performance |
| Competitor Alternative | 2002/2P4W | ABB | 2P4-position selector switch, compatible mounting dimension |
| Competitor Alternative | 3LD2102 | Siemens | 2-pole selector switch, 10A rated current, IP65 |
- Application Scope & Industry Usage
Recommended Applications
- Industrial Automation: PLC control circuit switching, equipment mode selection (Manual/Auto/Remote)
- Power System: Voltage & current measuring circuit switching, standby power selection
- Mechanical Equipment: Machine tool speed shift control, conveyor direction control
- Building Electrical: Lighting zone control, air conditioner mode selection
- Marine & Offshore: Control circuit switching under harsh environment (IP69K protection)
Non-recommended Scenarios
- On-load switching: Not applicable for direct inductive load switching (e.g. motors), use with contactors
- High frequent operation: Electrical service life approx. 50,000 cycles, not for high-speed frequent switching
- High voltage system: Max rated insulation voltage 440V, not for 690V and above systems
- Troubleshooting & Solutions
| Fault Phenomenon | Possible Causes | Solutions |
| Switch cannot rotate | 1. Lock mechanism not released | 1. Unlock FS2 locking device completely |
| 2. Internal mechanical jam | 2. Power off then inspect internal springs & contacts | |
| 3. Over-tight wiring | 3. Rewire and control torque ≤0.4Nm | |
| Poor contact performance | 1. Contact oxidation | 1. Polish silver contacts gently with fine sandpaper |
| 2. Contact wear | 2. Replace contact module or whole switch | |
| 3. Loose wiring | 3. Retighten all terminals | |
| Failed protection performance | 1. Aging sealing gasket | 1. Replace original sealing gasket |
| 2. Improper installation | 2. Ensure close fitting between switch and panel | |
| 3. Oversized panel cutout | 3. Adjust panel hole within 16-22mm | |
| Decreased rated current | 1. Excess ambient temperature | 1. Lower ambient temperature or enhance heat dissipation |
| 2. Contaminated contacts | 2. Clean contacts and terminals | |
| 3. Undersized cables | 3. Use qualified cables (stranded ≥0.75mm²) |
- Daily Maintenance Guidelines
- Periodic Inspection: Check locking structure and contact condition every 6 months
- Cleaning: Remove dust by compressed air, avoid chemical detergent
- Torque Management: Strictly follow 0.4Nm tightening torque during wiring
- Ambient Control: Avoid long-term operation above 55°C
- Misoperation Prevention: Keep locking mechanism functional to avoid accidental switching
- Air Freight Compliance & Certification
Air Shipment Allowed: No built-in lithium battery / super capacitor, classified as general electrical component
Main Certificates: CE (compliant with IEC 60947-3), UL 508, VDE 0660
HS Code: 85365080 (Electrical control switches & circuit breakers)
Complete Model List of Kraus & Naimer Blue Line Cam Switches
- General Classification Overview
Kraus & Naimer Blue Line switches are divided into 4 categories by rated current and usage, covering full range 10A~2400A.
- Control Switch Series (10A~25A) | Catalog 120
2.1 CG Series Compact Control Switch (10A/20A, IP20)
| Basic Model | Rated Current | Size | Features | Typical Models |
| CG4/CG4-1 | 10A | S00 | 1μ/35μ gold-plated contact, double-break silver alloy bridge | CG4-A201-600-FS2, CG4-A251-600-FS2 |
| CG6 | 10A | S0 | Standard control switch, finger-safe terminals | CG6-A201-600-FT2 |
| CG7 | 10A | S0 | Special function, illuminated handle optional | CG7-A214-600-FT2 |
| CG8 | 10A | S0 | Universal type, multi-mounting available | CG8-A220-600-FT4 |
| CG9 | 10A | S0 | With lock mechanism, anti-misoperation | CG9-A213-600-FS2 |
| CG10/CG11/CG12 | 10A | S0 | Multi-pole, max 4 poles | CG12-A251-600-FS2 |
| CG16 | 20A | S1 | Higher current, heavy-duty control | CG16-A201-600-FT2 |
2.2 CH/CHR Series (10A~25A, Lockable Terminal)
| Basic Model | Rated Current | Size | Features | Typical Models |
| CH10/CHR10 | 10A | S0 | CHR anti-loose terminal anti-vibration | CH10-A201-600-FT2 |
| CH11/CHR11 | 10A | S0 | Multi-pole, double-break design | CHR11-A251-600-FS2 |
| CH12/CHR12 | 10A | S0 | Special cam for complex control | CH12-A213-600-FS2 |
| CH16B/CHR16B | 16A | S1 | Higher current, finger protection | CH16B-A221-600E |
| CH20/CHR20 | 20A | S1 | Heavy-duty for motor circuits | CH20-A251-600-FS2 |
2.3 CGD Series Mini Control Switch (5A Low Current)
| Basic Model | Rated Current | Size | Features | Typical Models |
| CGD4-1 | 5A | S00 | Ultra-compact, 35渭 gold-plated contact | CGD4-1-A201-600-FT2 |
- Control & Load Switch Series (10A~315A) | Catalog 100
3.1 CA Series Universal Control Switch (10A~25A)
| Basic Model | Rated Current | Size | Features | Typical Models |
| CA0 | 10A | S00 | Mini type for narrow space | CA0-A201-600-FT2 |
| CA2 | 10A | S0 | Standard double-break structure | CA2-A201-600-FT2 |
| CA4 | 10A | S0 | Multi-pole up to 4 poles | CA4-A201-600-FT2 |
| CA10/CA10B | 10A | S0 | Finger-safe anti-shock terminal | CA10-A722-G001 |
| CA20/CA20B | 20A | S1 | Heavy-duty control | CA20B-A221-600E |
| CA25/CA25B | 25A | S1 | Max current for motor control | CA25B-A251-600-FS2 |
3.2 CAD Series Self-cleaning Contact Switch (10A~16A)
| Basic Model | Rated Current | Size | Features | Typical Models |
| CAD5 | 10A | S0 | Mini self-clean cross contact | CAD5-A201-600-FT2 |
| CAD11 | 10A | S0 | High contact stability | CAD11-US5626-FT1 |
| CAD16 | 16A | S1 | Industrial heavy-duty application | CAD16-A221-600E |
3.3 C Series Load Switch / Isolator (10A~315A)
| Basic Model | Rated Current | Size | Features | Typical Models |
| C26 | 26A | S1 | Basic load switch | C26-A201-600-FT2 |
| C32 | 32A | S1 | Higher breaking capacity | C32-A221-600E |
| C42/C43 | 40A | S2 | 2P/3P optional | C43-A221-600E |
| C63 | 63A | S2 | Heavy load switch | C63-A251-600-FS2 |
| C80/C80-6 | 80A | S3 | 6-pole optional | C80-6-A221-600E |
| C125/C125-6 | 125A | S3 | Medium high current | C125-A251-600-FS2 |
| C200-4 | 200A | S4 | 4-pole for 3-phase 4-wire | C200-4-A221-600E |
| C315/C316 | 315A | S4 | Main power isolation switch | C316-A251-600-FS2 |
3.4 CL Series Economic Load Switch (10A~20A)
| Basic Model | Rated Current | Size | Features | Typical Models |
| CL10 | 10A | S0 | Cost-effective basic control | CL10-A201-600-FT2 |
| CL20 | 20A | S1 | Economic heavy-duty control | CL20-A221-600E |
- High Current Isolator Series (350A~2400A) | Catalog 100
4.1 L Series High Current Isolator
| Basic Model | Rated Current | Size | Features | Typical Models |
| L350 | 350A | S5 | Standard high current isolator | L350-A221-600E |
| L500 | 500A | S5 | Medium large current | L500-A251-600-FS2 |
| L630 | 630A | S6 | Industrial main power supply | L630-A201-600-FT2 |
| L800 | 800A | S6 | Strong breaking performance | L800-A251-600-FS2 |
| L1000/L1100 | 1000A/1100A | S7 | Large industrial equipment | L1100-A221-600E |
| L1450 | 1450A | S7 | Ultra-large current | L1450-A251-600-FS2 |
| L1900 | 1900A | S8 | Factory main power switch | L1900-A221-600E |
| L2400 | 2400A | S8 | Max current for heavy industry | L2400-A251-600-FS2 |
- Load Break Switch Series (16A~1250A) | Catalog 100
5.1 KF/KH/KG Series Load Break Switch
| Basic Model | Rated Current | Size | Features | Typical Models |
| KF16/KF20 | 16A/20A | S0/S1 | Basic load break switch | KF20-T203/SGZ006E |
| KH32/KH41 | 32A/41A | S1/S2 | Enhanced breaking capacity | KH32-T203/SGZ006E |
| KG64/KG80 | 64A/80A | S2/S3 | Heavy load breaking | KG80-T203/SGZ006E |
| KG100/KG125 | 100A/125A | S3/S4 | Medium high current breaking | KG125-T203/SGZ006E |
| KG200/KG250 | 200A/250A | S4/S5 | Large equipment power control | KG250-T203/SGZ006E |
| KG400/KG630 | 400A/630A | S5/S6 | Factory branch power distribution | KG630-T203/SGZ006E |
| KG800/KG1250 | 800A/1250A | S6/S7 | Large factory main circuit control | KG1250-T203/SGZ006E |
- Model Naming Rule
| Code Section | Definition | Example |
| Series Code | CG=Compact Control, CA=General Control, CAD=Self-cleaning Contact, CH=Lock Terminal, C=Load Switch, L=High Current Isolator | CG4, CA10, C63, L630 |
| Contact Code | A=No zero position, B=With zero position; 2nd digit=pole number, last two digits=position number | A251=2P4P non-zero |
| Operating Angle | 600=3×60° total 180°, 620=Mixed angle | 600=4 positions |
| Mounting Code | FS2=Central locking, FT2=Flange locking, FS1=Front locking | FS2=Central lock mount |
| Handle Code | E=Standard handle, EAO=EAO compatible handle, G521=Rotary handle | E=Standard handle |
