ZHUCO SZW26-20C/D202.2Y Three-position two-section lockable single-hole mounting changeover switch

SZW26-20C/D202.2Y Changeover Switch
1. Product Overview; This product is a three-position, two-way (with position locking) single-hole mounting rotary changeover switch. Its core design simplifies panel installation, achieving fast and reliable fixing through a threaded locking structure, making it suitable for industrial equipment requiring high installation efficiency.
3. Electrical Parameters
Rated Voltage: AC 440V (50/60Hz); DC 240V
Rated Current: 20A
Contact Configuration: 8 terminals, forming two independent switching circuits.
Position I: Contacts 1-2 connected, 5-6 connected.
Position 0 (Middle Position): All contacts disconnected.
Position II: Contacts 3-4 connected, 7-8 connected.
4. Structure and Materials
Contacts: Silver alloy material, featuring low contact resistance, excellent conductivity, and resistance to oxidation and arcing.
Conductors: Thickened copper components, ensuring current carrying capacity and long-term temperature rise meet standards.
Insulation and Housing: Made of flame-retardant, high-temperature resistant, environmentally friendly engineering plastic, providing reliable insulation performance and high mechanical strength.
Internal Structure: Compact and reasonable layout, stable contact action, and reliable transmission mechanism.
5. Operating Environmental Conditions
Ambient Temperature: -25°C to +40°C
Altitude: Not exceeding 2000 meters
Relative Humidity: Not exceeding 50% at the highest temperature of +40°C; up to 90% at lower temperatures of +20°C. For occasional condensation that may occur due to temperature changes, protective measures should be taken at the equipment level.
6. Mechanical and Electrical Life
Mechanical Life: ≥ 100,000 cycles (operating frequency 120 cycles/hour)
Electrical Life: ≥ 30,000 cycles (at rated load, operating frequency 120 cycles/hour)
7. Typical Application Scenarios
This switch is suitable for AC and DC low-voltage electrical control circuits, used for power switching, circuit conversion, selection of two operating states for motors or loads, voltage or current switching for measuring instruments, etc. Its high reliability, large current capacity, and convenient installation method make it widely applicable in:
Industrial control cabinets: as a manual master switch to control the on/off and switching of circuits.
Power distribution equipment: for switching or backup indication in small power systems.
Motor drive systems: controlling motor forward/reverse rotation, star-delta starting conversion, or two-speed switching.
Testing and experimental equipment: manually selecting different test circuits or signal sources.