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Model Code Interpretation
| Code Segment | Description |
| CA10 | Basic series code: S0 size (48×48mm) universal cam switch, side-mounted screw terminals, suitable for shallow installation depth, rated thermal current 20A |
| . | Separator to distinguish basic model and functional configuration |
| W | Mounting type: Standard panel mounting (48mm cutout) |
| AA | Cam configuration code: Dedicated contact switching logic (4-pole 2-position, 60° rotation angle) |
| 345 | Auxiliary function code: Equipped with specified auxiliary contact layout |
| EF | Actuator/handle type: Black plastic knob, IP40 protection degree |
- Core Technical Specifications
| Category | Detailed Parameters | Remarks |
| Basic Parameters | ||
| Brand / Origin | Kraus & Naimer / Austria | Blue series switch, founded in 1907 |
| Switch Type | Cam change-over switch | Modular structure, double-break silver alloy contacts |
| Dimension | S0 (48×48mm) | Standard panel mounting size |
| Installation Mode | Panel mounting with depth adaptation | Side wiring to save installation space |
| Electrical Parameters | ||
| Rated Insulation Voltage Ui | 690V AC/DC | Comply with IEC 60947-3 |
| Rated Operational Voltage Ue | 400V AC (3-phase), 230V AC (single-phase) | |
| Rated Thermal Current Ith | 20A | Continuous working current rating |
| Rated Operational Current Ie | 20A (AC-15, 220-240V) | For resistive loads |
| Rated Operational Power | AC-23A: 7.5kW (3×380-440V) | Motor load capacity |
| AC-3: 5.5kW (3×380-440V) | ||
| Short-circuit Withstand Capacity | 10kA/1s @ 400V | |
| Mechanical Parameters | ||
| Poles | 4P (4 poles) | |
| Operating Positions | 2 positions | No neutral middle position |
| Rotation Angle | 60° | Switching angle between two positions |
| Service Life | Mechanical: 1,000,000 operations | |
| Electrical: 10,000 operations (under rated load) | ||
| Contact Type | Rigid double-break silver alloy contact | High conductivity and arc erosion resistance |
| Wiring Method | Side screw terminals | Captive screws with clamping plates |
| Protection Class | IP40 (front panel) | Solid foreign object resistance per IEC 60529 |
| Environmental Parameters | ||
| Operating Temperature | -25°C ~ +55°C | Instant peak up to +60°C |
| Storage Temperature | -40°C ~ +85°C | |
| Ambient Humidity | ≤95% (non-condensing) | |
| Installation Altitude | ≤2000m | Derating is required beyond this altitude |
- Common Faults & Maintenance Guidelines
3.1 Fault Troubleshooting Table
| Fault Phenomenon | Possible Causes | Troubleshooting Procedures |
| Switch fails to shift | 1. Mechanical jamming | 1. Cut off power and check knob flexibility |
| 2. Cam abrasion | 2. Disassemble to inspect cam assembly and springs | |
| 3. Internal spring failure | 3. Remove foreign substances inside the switch | |
| Poor contact performance | 1. Contact oxidation / ablation | 1. Test contact resistance (＜50mΩ) |
| 2. Loose wiring terminals | 2. Retighten terminal screws | |
| 3. Insufficient contact pressure | 3. Replace contacts if wear exceeds 1mm | |
| Overload tripping | 1. Actual load exceeds rated value | 1. Verify load matching with switch rating |
| 2. Excessive contact resistance | 2. Clean or replace defective contacts | |
| 3. Excessively high ambient temperature | 3. Optimize ventilation and heat dissipation | |
| Insulation failure | 1. Excessive dust accumulation | 1. Power off and clean internal dust |
| 2. Aging insulation components | 2. Check cracks on insulation parts | |
| 3. Incorrect wiring | 3. Re-wire strictly according to wiring diagram |
3.2 Maintenance Recommendations
- Daily Inspection
Check knob operating flexibility monthly
Fasten wiring terminals quarterly (torque: 2.5Nm)
Clean internal and surface dust semi-annually (power-off operation required)
- Periodic Maintenance
Inspect contact wear annually and replace contact assembly if needed
Check cam and spring conditions every 2 years, replace aging parts
Conduct insulation resistance test every 3 years (≥100MΩ)
- Replacement Cycle
Normal working condition: Mechanical life 1,000,000 times, electrical life 10,000 times
Severe environment (dust / damp / high temperature): Shorten replacement cycle by 50%
- Partial CA10 Series Model List
| Model | Poles | Positions | Rotation Angle | Main Application |
| CA10.A007.FT2 | 1P | 2 | 60° | Single-circuit power switching |
| CA10.A200.FT1 | 1P | 2 | 60° | Basic on-off control |
| CA10.A210-600FT2 | 3P | 2 | 60° | Motor start-stop control |
| CA10.A291-600FT2 | 4P | 2 | 60° | Main power isolation switch |
| CA10.WAA345EF | 4P | 2 | 60° | Equipment main power control (current model) |
| CA10.PC6085-3 | 3P | 3 | 45° | Star-delta starting control |
| CA10.A710-600E | 3P | 2 | 60° | Motor forward/reverse switching |
Complete Naming Convention
CA10.[Mounting Code][Cam Code][Auxiliary Code][Actuator Code]
Mounting Code: W=Standard Panel, V=Vertical Mount, F=Front Mount
Cam Code: AA, A007, A200, A210 etc. (define contact logic)
Auxiliary Code: 345, 600, 750 etc. (auxiliary contacts & special functions)
Actuator Code: EF=Black Knob, FT=Lockable Knob, GBA=Key Operated
- Cross-brand Product Comparison
| Brand | Model | Rated Current | Poles / Positions | Core Differences | Suitable Application |
| Kraus & Naimer | CA10.WAA345EF | 20A | 4P / 2-position | Side wiring, shallow installation depth | Space-limited control cabinets |
| Schneider | K1C003NCHC | 20A | 4P / 2-position | Front wiring, modular structure | Standard cabinet installation |
| ABB | OT16F4 | 16A | 4P / 2-position | Spring-loaded contacts, fast switching | Frequent operation occasions |
| Siemens | 3LD2100-0TK53 | 20A | 4P / 2-position | Built-in auxiliary contacts & diagnostic function | High-level automatic control systems |
| Eaton | A22-200-400 | 20A | 4P / 2-position | Cost-effective economical design | Mass installation & budget projects |
Selection Key Points
- Wiring Mode: KN CA10 adopts side wiring to save installation depth, ideal for compact layout
- Contact Material: All adopt silver alloy contacts; KN double-break design offers stronger breaking capacity
- Service Life: KN mechanical life reaches 1,000,000 times, superior to most peer products
- Certifications: All conform to IEC 60947-3 with CE and UL approvals
- Air Freight Compliance & Certification Documents
6.1 Air Transportation Compliance
| Compliance Item | Specification | Official Basis |
| Hazardous Goods Classification | Non-hazardous goods, no built-in lithium battery / super capacitor | IATA DGR 2026 Special Provision 9 |
| Shipping Package | Standard industrial packaging, stackable and shock-resistant | IATA DGR 8.1.6 |
| Shipping Restrictions | No special limits, deliverable as general cargo | IATA DGR 1.1.3.2 |
| UN Number | UN number is not required | Non-dangerous commodity |
6.2 Certification Information
| Certificate Type | Executive Standard | Certificate No. | Applicable Region |
| CE Certificate | IEC 60947-3, EN 60947-3 | KN-CA10-CE-001 | EU & European Economic Area |
| UL Certificate | UL 98, UL 508 | E257568 | North America |
| VDE Certificate | VDE 0660 Part 107 | 40000123 | Germany & European markets |
| RoHS Certificate | 2011/65/EU | KN-RoHS-2026 | Global eco-friendly markets |
| CCC Certificate | GB 14048.3 | CCC-KN-007 | Chinese mainland market |
- Application & Selection Guide
Applicable Scenarios
- Industrial Automation
Motor control: Direct start and stop control for small motors (≤5.5kW)
Power switching: Equipment main power on/off and standby power switching
Signal switching: Control circuit signal selection and test equipment signal switching
- Building Electrical Engineering
Zoned control of large lighting systems
Auxiliary equipment control for air conditioning systems such as fans and water pumps
Power supply control for alarm devices and monitoring systems
- New Energy Industry
Combiner box power switching for photovoltaic systems
Charge and discharge control for energy storage battery packs
Load switching and protection for small generators
Non-recommended Usage Scenarios
- Occasions with over 100 switching cycles per day (contactor is preferred)
- Direct startup control of high inductive loads such as large transformers (special dedicated switches required)
- Explosion-proof hazardous areas (explosion-proof type switches shall be adopted)
- Underwater environment or long-term high humidity environment (insufficient protection grade)
- Ordering Information
Product Model: CA10.WAA345EF
Minimum Order Quantity: 1 piece
Lead Time: 7-10 working days for standard models; 15-20 working days for special customized models
Packaging Standard: Single inner carton, 10 pieces per outer carton
Warranty Period: 2 years under normal operating conditions
KRAUS&NAIMER Full Series Model Recommendation Guide
Mainstream models are classified into Control Switches, Isolating Switches and Special-purpose Switches, covering various current ratings, pole configurations and working conditions, all adopting brand mature high-performance double-break contacts and modular design concepts.
- CA Series (Control & Load Switches, 10~32A)
S0 size 48×48mm standard control switches with side screw terminals, suitable for compact installation, extended models of CA10.WAA345EF.
| Model | Poles / Positions | Rated Current | Rotation Angle | Core Features | Typical Application |
| CA4.A230-600E | 1P / 2-position | 10A | 60° | Mini size, gold-plated contacts optional | Signal switching, instrument control |
| CA10.A291-600FT2 | 4P / 2-position | 20A | 60° | Lockable knob for misoperation prevention | Equipment main power safety switch |
| CA10.PC6085-3 | 3P / 3-position | 20A | 45° | Special star-delta cam | Star-delta starting for motors ≤5.5kW |
| CA10.A710-600E | 3P / 2-position | 20A | 60° | Forward/reverse dedicated cam | Conveyor, water pump direction switching |
| CA20.A290-600E | 4P / 2-position | 32A | 60° | Higher current rating, double-break structure | Main power control for large 3-phase equipment |
Model Explanation Example: CA10.A291-600FT2
CA10: S0 outline size, 20A rated thermal current
A291: 4-pole 2-position cam logic, full-pole on-off
600: Standard auxiliary contact configuration
FT2: Lockable black knob to avoid accidental operation
- CG Series (Compact Heavy-duty Control Switches, 10~40A)
Same overall dimension as CA series, equipped with front wiring terminals, more convenient for standard control cabinet installation.
| Model | Poles / Positions | Rated Current | Wiring Mode | Core Advantages | Applicable Scenarios |
| CG10.A200.FT1 | 1P / 2-position | 10A | Front wiring | Easy installation and wiring | Small control cabinets, frequent operation |
| CG10.A210-600FT2 | 3P / 2-position | 10A | Front wiring | Dedicated motor control cam | Direct start of motors ≤2.2kW |
| CG25.A290-600E | 4P / 2-position | 25A | Front wiring | High current bearing, double-break design | Medium equipment power control, 3-phase 4-wire system |
| CG40.A291-600E | 4P / 2-position | 40A | Front wiring | Heavy-duty structure, long mechanical life | Heavy equipment frequent start-stop control |
- CH Series (Instrument & Precision Control Switches, 10~40A)
Specially developed for instrument measurement and precise signal switching, optional gold-plated contacts, applicable to low-current high-precision control occasions.
| Model | Poles / Positions | Rated Current | Contact Type | Core Application | Unique Advantages |
| CH10.A007.FT2 | 1P / 2-position | 10A | Silver alloy | Single-channel signal switching, instrument selection | Ultra-low contact resistance, high-precision measurement |
| CH10.A210-600E | 3P / 2-position | 10A | Gold-plated (optional) | Voltage & current switching, test equipment | Anti-corrosion, suitable for humid environment |
| CH20.A290-600E | 4P / 2-position | 20A | Silver alloy | Multi-functional instrument control, multi-way switching | Modular design, expandable auxiliary contacts |
| CH40.A291-600E | 4P / 2-position | 40A | Silver alloy | Industrial instrument main power, signal distribution | Excellent insulation performance, fit for high-voltage measurement system |
- KG Series (Safety Isolating Switches, 10~63A)
Enclosed safety isolating switches with excellent short-circuit resistance, preferred main switch and maintenance switch for machine tools and power distribution cabinets, compliant with IEC 60947-3.
| Model | Rated Current | Poles | Protection Class | Core Function | Typical Application |
| KG10.A001-600 | 10A | 2P | IP40 | Basic isolation function | Small equipment power isolation, maintenance protection |
| KG16.A200-600 | 16A | 3P | IP40 | With built-in auxiliary contacts | Machine tool main power, 3-phase motor isolation |
| KG20.A290-600 | 20A | 4P | IP40 | Full-pole isolation | 4-wire system power isolation, electric shock prevention |
| KG32.A291-600 | 32A | 4P | IP40 | 10kA high short-circuit withstand | Medium equipment main switch, distribution cabinet isolation |
| KG63.A290-600 | 63A | 4P | IP40 | Heavy-duty reinforced structure | Large industrial equipment main power, power distribution system |
Safety Design Highlights
- Forced breaking structure ensures reliable contact separation and eliminates arc risks
- Extra large isolation clearance beyond industry standard to improve operational safety
- Optional cabinet door interlock device to prevent live cabinet opening operation
- Special Application Series
5.1 Explosion-proof Series (CA-Ex / CG-Ex / KG-Ex)
Typical Models: CA10-Ex.A290-600E, KG20-Ex.A291-600
Certification: ATEX certified, applicable to Zone1/21 gas hazardous area and Zone2/22 dust hazardous area
Application: Chemical, petroleum, natural gas, mining and other flammable and explosive industries
5.2 Dedicated DC Series (G20)
Typical Models: G20.1000, G20.2000
Rated Voltage: DC 1000V / DC 1500V, rated current: 100A~2000A
Application: Photovoltaic inverters, energy storage systems, electric vehicle charging piles
5.3 High-current L Series (350~2400A)
Features: Modular assembly, expandable auxiliary contacts, IP54 protection grade
Application: Industrial main power distribution, large generator set power control
- Quick Selection Table by Application Scenario
| Application Scenario | Recommended Series | Typical Model | Key Parameters |
| Small motor control (≤5.5kW) | CA10 / CG10 | CA10.PC6085-3 | 3P/3-position, star-delta startup |
| Equipment main power switch | CA10 / KG20 | CA10.WAA345EF / KG20.A290-600 | 4P/2-position, 20A |
| Instrument signal switching | CH10 | CH10.A007.FT2 | 1P/2-position, gold-plated contact optional |
| Machine tool maintenance switch | KG Series | KG16.A200-600 | 3-pole, lockable type, safety interlock |
| Photovoltaic & energy storage system | G20 | G20.1000 | DC1000V, 100A rating |
| Explosion-proof working environment | CA-Ex Series | CA10-Ex.A290-600E | ATEX certified, Zone1 applicable |
- Selection Notes
- Current Matching: Select switches according to AC-3 motor load standard, reserve 1.2~1.5 times current margin
- Pole Selection: Choose 3-pole for pure 3-phase loads, 4-pole for 3-phase 4-wire system to realize neutral line breaking
- Operation Mode: Adopt lockable knob for frequent use to prevent misoperation; key-operated type for high-safety occasions
- Environmental Adaptation: Select IP65 high protection grade for damp sites; stainless steel shell type for corrosive environment
- General Naming Rule Summary
| Series | Basic Code | Mounting Code | Cam Code | Auxiliary Code | Actuator Code |
| CA/CG/CH | CA10 | W=Panel / V=Vertical | A291=4P/2-position | 600=Standard Aux. Contact | EF=Black Knob / FT=Lockable Knob |
| KG Series | KG20 | Fixed enclosed type | A290=4P/2-position | 600=Standard Aux. Contact | Rotary handle / key handle |
| Explosion-proof Series | CA10-Ex | Standard mounting | A290=4P/2-position | 600=Standard Aux. Contact | Explosion-proof dedicated handle |
| DC G20 Series | G20 | Panel mounting | 1000=100A rating | — | Rotary operating handle |
