The CR1F1504GZ7 is a TeSys F magnetic contactor from Schneider Electric, part of the TeSys range. It is a 4-pole device (4 NO power poles) rated for AC-1 utilisation category, meaning it is designed for resistive or slightly inductive loads — not motor starting. The control circuit is 127 VDC, with a standard coil that latches between 35 and 40 ms and unlatches between 50 and 100 ms.
The 150 A AC-1 rating is the headline figure: this contactor switches resistive loads up to 150 A without derating at 40 °C. The 250 A Ith rating gives headroom for thermal capacity in free air, but the actual switching duty governs the selection. Power dissipation per pole runs 18 W in AC-1 use — plan enclosure ventilation accordingly. Coil consumption is significant on pull-in: 1100 VA AC at 50/60 Hz when latching, dropping to 10 VA DC when unlatching. The control circuit voltage limits are 0.85...1.1 Uc for both latching and unlatching — the 127 VDC coil holds reliably between about 108 V and 140 VDC. Operating time is fast enough for most switching sequences but not for high-speed cycling: maximum operating rate is 120 cycles per minute at 40 °C.
AC-1 contactors like this one are typically found in heating, lighting, and distribution panels where the load is resistive or has a low inrush — electric heaters, banks of incandescent lamps, capacitor banks, or transformer primary switching. The 4-pole configuration with all NO contacts suits applications needing four independent switching paths in a single frame. The TeSys F series is a standard panel-mount form factor with a 3-pole footprint extended for the fourth pole.