SZW2620 D202.2 Universal Changeover Transfer Switch Compact 2phase cam switch with silver contacts, designed for reliable manual or panelmounted phase changeover in control and power circuits. Key features Model: SZW2620 and compatible SZW26/LW2620; product code SZW2620/D202.2 Type: Universal cam changeover switch, 2phase, custom cam design Current rating: Conventional heating current Ith 20A; rated working current 20A for AC applications Voltage ratings: Rated insulation voltage Ui 660V; AC rated working voltage Ue 440V; DC rated working voltage Ue 240V Utilization categories: AC15: Ie 20A at 440V; DC13: Ie 1A at 240V Contacts: Silver contact material for consistent conductivity and low contact resistance Body material: Durable plastic housing Mounting and panel dimensions: Suited for 48x48 mm and 64x64 mm panel cutouts; color D202.2 Quantity: 1 piece Why choose this switch Reliable changeover operation: Silver contacts and a custom cam mechanism deliver stable switching for control circuits and small power systems. Wide electrical compatibility: insulation voltage and distinct AC and DC ratings cover common industrial control and automation needs. Compact panel integration: Designed for standard 48x48 mm and 64x64 mm panel openings, saving panel space while providing a clear manual changeover interface. Simple specification for selection: Clear Ith, Ui, and rated working currents allow straightforward matching to circuit requirements. Performance and safetyrelated specifications Conventional heating current Ith 20A ensures the switch can carry continuous control currents up to its rated thermal limit. Rated insulation voltage Ui 660V supports isolation between poles and reduces the risk of dielectric breakdown in typical industrial environments. Use category AC15: rated 20A at 440V for inductive control loads; DC13: rated 1A at 240V for DC control circuits. No concern chemicals present in the product construction. Applications and use scenarios Generator changeover panels: Manual changeover between mains and backup generator feeds in small generator control panels where a compact, rated cam switch is required. Motor control and machine panels: Select or isolate phases for control circuits, contactors, or control transformers in machine control cabinets. Test benches and control setups: Durable manual switching for switching test circuits, selecting signal paths, or reconfiguring control wiring during setup and maintenance. Compatibility and installation notes Designed for panel mounting in standard 48x48 mm and 64x64 mm cutouts; verify cutout and mounting depth before installation. Confirm that circuit currents and voltages do not exceed the listed ratings: Ith 20A, Ui 660V, AC working 440V at 20A, DC working 240V at 1A. Use appropriate wire sizes, terminals, and protective devices in accordance with local electrical codes and practices. What is included One SZW2620/D202.2 universal changeover cam switch, plastic housing, silver contacts, color D202.2, suitable for 48x48 mm and 64x64 mm panel mounting. This switch provides a compact, clearly specified solution for manual phase changeover and control switching where a 20A rated, twophase cam switch is required.