{"id":3286,"date":"2026-04-14T21:02:37","date_gmt":"2026-04-14T21:02:37","guid":{"rendered":"https:\/\/skylineelectric.saveenergypowersolutions.com\/?post_type=product&p=3286"},"modified":"2026-04-15T21:10:07","modified_gmt":"2026-04-15T21:10:07","slug":"4-pole-mcb-20a-63a-ac-circuit-breaker","status":"publish","type":"product","link":"https:\/\/skylineelectric.saveenergypowersolutions.com\/?product=4-pole-mcb-20a-63a-ac-circuit-breaker","title":{"rendered":"4 Pole MCB 20A-63A | AC Circuit Breaker"},"content":{"rendered":"

CNC YCB7-63N 4 Pole AC MCB<\/h2>\n

This 4 pole miniature circuit breaker protects three-phase + neutral circuits against overload and short circuit faults. It is commonly used in three-phase distribution boards for commercial buildings, factories, and agricultural pump feeders across Pakistan.<\/p>\n

The YCB7-63N series is DIN-rail mounted and fits standard Pakistani DB enclosures. Each unit covers all four conductors (L1, L2, L3, N) in a single trip mechanism, so a fault on any phase disconnects the entire supply — preventing single-phasing damage to motors and compressors.<\/p>\n

Specifications<\/h2>\n\n\n\n\n\n\n\n\n\n\n
Model<\/th>\nYCB7-63N (4P)<\/td>\n<\/tr>\n
Poles<\/th>\n4 Pole (3P+N)<\/td>\n<\/tr>\n
Rated Current<\/th>\n20A, 32A, 40A, 63A<\/td>\n<\/tr>\n
Rated Voltage<\/th>\nAC 400V \/ 50Hz<\/td>\n<\/tr>\n
Breaking Capacity<\/th>\n6kA<\/td>\n<\/tr>\n
Trip Curve<\/th>\nC Curve<\/td>\n<\/tr>\n
Mounting<\/th>\n35mm DIN Rail<\/td>\n<\/tr>\n
Standard<\/th>\nIEC 60898<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Typical Applications<\/h2>\n
    \n
  • Main breaker for 3-phase DB boards in shops, offices, and small factories<\/li>\n
  • Motor feeder protection (submersible pumps, compressors up to 63A)<\/li>\n
  • Generator changeover panel — WAPDA\/generator incoming side<\/li>\n
  • Three-phase solar inverter AC output protection<\/li>\n<\/ul>\n

    Installation Note<\/h2>\n

    Wire the neutral through the 4th pole. On a fault, all four poles trip simultaneously. Use 6mm\u00b2 copper wire for 32A and below; 10mm\u00b2 for 40A and 63A ratings. Torque terminal screws to 2.5 Nm.<\/p>\n","protected":false},"excerpt":{"rendered":"

    CNC YCB7-63N 4 Pole AC MCB<\/h2>\n

    This 4 pole miniature circuit breaker protects three-phase + neutral circuits against overload and short circuit faults. It is commonly used in three-phase distribution boards for commercial buildings, factories, and agricultural pump feeders across Pakistan.<\/p>\n","protected":false},"featured_media":3294,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[289],"product_cat":[430,303,418],"product_tag":[],"class_list":["post-3286","product","type-product","status-publish","has-post-thumbnail","product_brand-cnc-electric","product_cat-4-pole-mcb-20a-63a","product_cat-ac-breaker","product_cat-cnc-electric","first","instock","shipping-taxable","purchasable","product-type-variable"],"yoast_head":"\n4 Pole MCB 20A-63A | AC Circuit Breaker - Electric<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/skylineelectric.saveenergypowersolutions.com\/?product=4-pole-mcb-20a-63a-ac-circuit-breaker\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"4 Pole MCB 20A-63A | AC Circuit Breaker - Electric\" \/>\n<meta property=\"og:description\" content=\"CNC YCB7-63N 4 Pole AC MCB This 4 pole miniature circuit breaker protects three-phase + neutral circuits against overload and short circuit faults. 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