Square D 989216 Feed-Thru Circuit Breaker ML-1

Square D 989216 is a 100-amp, 240-volt, two-pole feed-through molded-case circuit breaker in the ML-1 family. The feed-through configuration allows power to pass through the device to downstream conductors while maintaining overcurrent protection for the main circuit, enabling a single unit to feed additional panels or subcircuits in a compact footprint. As a member of the ML-1 line, this breaker is designed for 1-phase, two-pole service and follows Square D’s legacy molded-case construction, which combines a rigid positive-lock mounting with a sturdy terminal assembly. The 100 A rating and 240 V operation indicate it is intended for standard residential or light commercial feeder applications where a main panel needs to branch out to downstream circuits. Used in environments where a feed-through breaker is appropriate, it helps streamline wiring by consolidating protection and distribution into one device, and it is typically paired with compatible ML-1 panel configurations from Square D/Schneider Electric. Given its specifications, this unit serves as a feeder breaker in 1-phase, 2-pole configurations, balancing current carrying capacity with the convenience of direct-through lugs for downstream distribution.