{"product_id":"swallow-electric-sul-hb-4000e-0230-control-transformer","title":"Swallow Electric SUL-HB-4000E-0230 Control Transformer","description":"\u003cdiv\u003e\u003cp\u003eSwallow Electric SUL-HB-4000E-0230 is a single-phase control transformer rated at 4.0 kVA, manufactured by Swallow Electric Co., Ltd. The model sits in the SUL-HB family and is identified by the 4000E-0230 suffix, indicating its place in Swallow’s line of medium-capacity control transformers used in electrical control panels and automated equipment. As a control transformer, it provides an isolated source of voltage to power relay coils, contactors, PLC input modules, and other low-voltage control devices, helping separate control circuits from heavier power circuits within a cabinet. The 4.0 kVA rating conveys its capacity to support multiple control loads concurrently, enabling panel builders to consolidate relays, timers, and signaling components in a compact footprint. This model is selected when a robust, single-phase transformer is required for mid-sized control applications, such as machine controls and industrial automation assemblies, where dependable voltage delivery for low-voltage controls is essential.\u003c\/p\u003e\u003c\/div\u003e","brand":"Swallow","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":46253375717610,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/8039\/3450\/files\/GTG-STOCK-010.png?v=1788727428","url":"https:\/\/gtghardware.com\/products\/swallow-electric-sul-hb-4000e-0230-control-transformer","provider":"GTG Hardware","version":"1.0","type":"link"}