The Schneider Electric LV839255 is an XF closing voltage release — a solenoid-style closing coil — designed for MasterPact MTZ drawout circuit breakers. It energizes the breaker's closing mechanism when the control voltage is applied, allowing remote or automatic closing of the main contacts. Control circuit voltage is 48 V AC at 50/60 Hz or 48 to 60 V DC, with a threshold tripping voltage range of 0.85 to 1.1 times the nominal voltage (Un). Holding power draws 4.5 VA (AC) or 4.5 W (DC). Response time is frame-dependent: 55 ms ±10% on MTZ1, 70 ms ±10% on MTZ2, and 80 ms ±10% on MTZ3. The drawout mounting mode means this coil installs into the breaker's drawout cradle, not the fixed portion — relevant when specifying spare parts for a drawout chassis.
The 48 V AC / 48-60 V DC control voltage is the critical fit parameter — this coil will not operate on 24 V or 110 V control power. The 0.85 to 1.1 Un threshold means the coil picks up reliably at 40.8 V AC (0.85 × 48 V) and must not see sustained voltage above 52.8 V AC (1.1 × 48 V). On the DC side, the acceptable range is 40.8 V to 66 V DC. Holding power of 4.5 VA / 4.5 W is modest — the control transformer or DC supply only needs to support that continuous draw once the coil is sealed. The inrush is higher but brief; the response time figures (55-80 ms) include the mechanical travel of the closing mechanism.