Siemens 5SY4120-8 5SY4 miniature circuit breaker 20 A (18 mm) 5SY41208

Product Description

Siemens 5SY4120-8 is a supplementary protector (miniature circuit breaker) rated 20 A for single-pole circuit protection, intended for applications up to 277 VAC. The device features a D trip characteristic, UL 1077 approval, thermoplastic housing, and DIN-rail mounting with identical screw connections on line and load sides. Typical uses include panel and distribution circuit protection where supplementary overcurrent protection is required.

• Single-pole supplementary protector, 20 A rating, D trip characteristic
• Rated for up to 277 VAC; UL 1077 and relevant IEC/EN/CSA standards
• DIN-rail mounting, thermoplastic enclosure, identical screw connections on line and load

Product Highlights

Supplementary 1-pole MCB; 20 A; D-characteristic; 277 VAC; 5 kA interrupt rating; DIN-rail; UL 1077 approved

Product Information

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: 5SY4120-8
• Country of Origin: Germany

Technical Specifications

• Manufacturer: SIEMENS
• Manufacturer Part Number: 5SY4120-8
• Product Type: Supplementary protector / miniature circuit breaker (5SY4 family)
• Series: SENTRON
• Number of Poles: 1 Pole
• Current Rating: 20 A
• Voltage Rating (AC): 277 VAC
• Trip Characteristic: D
• Interrupt Rating: 5 kAIC
• Mounting Type: DIN rail
• Connection Type: Screw terminals (identical on line and load)
• Material: Thermoplastic
• Standards / Approvals: EN 60898; CSA 22.2 No. 235; EN 60947-2; UL 1077; IEC; CE
• Frequency: 50 Hz (manufacturer data sometimes lists 50/60 Hz; see notes)
• Applications: Supplementary protection
• Country of Origin: Germany
• GTIN / UPC: 00754554875538