ZHUCO SZW26-20/C04.2-2A11SAE0496220-1F Two-position two-section changeover switch with push-lock

SZW26-20/C04.2-2A11SAE0496220-1F Rotary Changeover Switch (with Safety Lock)
1. Product Overview
This product is a two-position, two-section rotary changeover switch with a central "0" off position.  Its core feature is the inclusion of an external lockable mechanism (push-pull latch). This design allows the switch to be locked in a specific position (typically the "OFF" position) using a padlock when needed, meeting equipment maintenance or safety management requirements. The switch uses a four-screw panel mounting method for a robust structure.
2. Installation and Safety Features
The four-screw (or bolt) panel mounting ensures high reliability in vibrating environments. The switch is equipped with a red push-pull latch; pushing it inward reveals the lock hole, allowing the use of a standard padlock (provided by the user) for locking, effectively preventing unauthorized operation or accidental activation, and complying with safety operating procedures.
3. Electrical Parameters
Rated Voltage: AC 440V (50/60Hz); DC 240V
Rated Current: 20A
Contact Configuration: Two-section structure.
Position 0: All contacts open (central stop position).
Position 1: Contacts 1-2 connected, 3-4 connected.
Position 2: Contacts 5-6 connected, 7-8 connected (this is a double-pole double-throw configuration logic, ensuring that when rotating from position 0 to the other direction, another set of circuits is connected).
4. Structure and Materials
Contacts: Silver alloy material, low contact resistance, arc-resistant, and oxidation-resistant.
Conductors: Thickened copper components, ensuring current carrying capacity and low heat generation.
Insulation and Housing: Flame-retardant, high-temperature resistant, environmentally friendly engineering plastic, reliable electrical insulation performance.
Operating Mechanism: With clear position indication, combined with the locking mechanism, ensuring stable and reliable operation. Panel markings support customization. 5. Environmental Conditions
Ambient temperature: -25°C to +40°C
Altitude: ≤ 2000 meters
Relative humidity: ≤ 50% at +40°C; up to 90% at +20°C (protective measures against possible condensation are required).
6. Mechanical and Electrical Life
Mechanical life: ≥ 100,000 cycles
Electrical life: ≥ 30,000 cycles (at rated load)
Operating frequency: Recommended ≤ 120 cycles/hour
7. Application Scenarios
This switch is specifically designed for industrial electrical circuits requiring forced safety isolation or access control.
Equipment maintenance safety lockout (LOTO): During equipment maintenance, the switch is turned to the "0" position and locked with a padlock to achieve reliable electrical isolation and personnel safety lockout.
Critical equipment control: Used for "start/stop" mode selection of equipment such as fans, pumps, and compressors, and can be locked in a safe position.
Power switching and isolation: Used in distribution boxes and control cabinets where manual switching of power or load is required, and where protection against accidental operation is necessary.
Alternative solution: Can replace ordinary changeover switches and provide a compliant solution in applications requiring safety lockout specifications.