{"product_id":"qbp147979","title":"Victron Energy SolidSwitch 104 Solid State DC Switch, 70V\/4A, Digital Signal Control","description":"\u003ch6\u003eOverview\u003c\/h6\u003e\u003cp\u003eThe Victron Energy BMS800200104 is a SolidSwitch 104 solid-state DC switch for controlling DC loads up to 70 V and 4 A from a low-power digital control signal. It is made for low-current switching tasks in a boat DC system, such as controlling an alternator regulator in a Victron lithium installation, switching a small DC load, or expanding the number of chargers connected to a BMS ATC output.\u003c\/p\u003e\u003cp\u003eIt works with resistive, capacitive, and inductive loads, including contactor coils, when those loads stay within the specified limits. The operating input range is 8 to 70 V DC, the load turns on from a 3.3 V to 70 V remote input, and the minimum input current to switch on is 30 µA.\u003c\/p\u003e\u003cp\u003eWith an IP20 ABS housing and a 58 x 66 x 23 mm body, this unit belongs in a protected electrical space rather than an exposed cockpit or splash-prone engine room location. It is not reverse polarity protected and not short circuit proof, so wiring polarity and circuit protection need to be checked before power is applied.\u003c\/p\u003e\u003ch6\u003eKey features\u003c\/h6\u003e\u003cul\u003e\n\u003cli\u003eSwitches DC loads up to 70 V and 4 A without using a traditional relay coil.\u003c\/li\u003e\n\u003cli\u003eAccepts a low-power digital control signal, with load off when the remote input is floating or below 3 V and load on from 3.3 V to 70 V.\u003c\/li\u003e\n\u003cli\u003eWorks with resistive, capacitive, and inductive DC loads, including high-power contactor coils within the specified load limits.\u003c\/li\u003e\n\u003cli\u003eVery low control-side draw, about 0.04 Ah per month, which helps reduce standby drain in lithium BMS and alternator-control circuits.\u003c\/li\u003e\n\u003cli\u003eUseful for Victron lithium system tasks such as alternator regulator control or adding charger control points to a BMS ATC output.\u003c\/li\u003e\n\u003cli\u003eIP20 ABS housing in matt black with a 58 x 66 x 23 mm footprint for installation inside a protected DC distribution area.\u003c\/li\u003e\n\u003cli\u003eNot reverse polarity protected and not short circuit proof, so correct polarity, overcurrent protection, and careful commissioning are important.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch6\u003eInstallation and setup\u003c\/h6\u003e\u003cp\u003eMount the unit where it stays dry and protected, such as inside an electrical locker, battery system enclosure, or DC distribution panel with access for inspection. The IP20 rating is not for washdowns or salt spray, so the switch should not be treated as a deck-mounted component.\u003c\/p\u003e\u003cp\u003eBefore connecting the load, confirm the vessel voltage, the expected continuous current, and the type of load being switched. Capacitive and inductive loads have specific limits, so contactor coils, lights, and control circuits should be checked against the electrical design before energizing the switch.\u003c\/p\u003e\u003ch6\u003eElectrical and system integration\u003c\/h6\u003e\u003cp\u003eThe SolidSwitch 104 is most useful where a BMS or control output can supply a small signal but should not carry the full load current. In a Victron lithium system, it can sit between a BMS control output and an alternator regulator or another controlled DC load, keeping standby draw low compared with a small relay.\u003c\/p\u003e\u003cp\u003eIt is not a replacement for a main battery switch, breaker, or high-current contactor. It is a control component for DC loads within its 70 V and 4 A rating, so the rest of the circuit should still use the correct cable sizing, overcurrent protection, and service disconnects for the boat.\u003c\/p\u003e\u003ch6\u003eUse cases on board\u003c\/h6\u003e\u003cp\u003eThis switch is a good match for vessels using Victron lithium battery management, alternator control, or small controlled DC loads where standby amp-hour draw matters. It also makes sense on cruising boats, workboats, and fishing boats with control panels or automation circuits that need a small signal to control a separate DC load.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52023458988213,"sku":"QBP147979","price":39.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0977\/8171\/1029\/files\/1332132_qbp147979.jpg?v=1780191816","url":"https:\/\/www.qualityboatparts.com\/products\/qbp147979","provider":"Quality Boat Parts","version":"1.0","type":"link"}