Square D FDA34060 Molded Case Circuit Breaker

This breaker is designed exclusively for Square D I-Line panelboards and switchboards. It utilizes a plug-on phase connection that mounts directly to the internal bus system.

Yes, the F-frame series is a legacy molded case circuit breaker. For modern installations or replacements, it has been superseded by the PowerPact H-frame series, specifically the HDA36060 for 60A I-Line applications.

Yes, the PowerPact H-frame is the manufacturer-designated replacement for legacy F-frame I-Line breakers. When installing an H-frame in an older I-Line panel, the mounting screw on the off end must be affixed to a slot on the backpan rather than the round hole used by the original F-frame.

In the Square D F-frame nomenclature, the "D" designates the standard interrupting capacity. For this specific breaker, it provides an 18kA rating at 480VAC and a 25kA rating at 240VAC.

No, the FDA34060 features a fixed thermal-magnetic trip unit. Both the long-time overload protection and the instantaneous short-circuit protection are factory calibrated and cannot be adjusted in the field.

The I-Line plug-on design utilizes blow-on jaw connections. During a high-fault short circuit, the magnetic forces generated cause the jaws to grip the panelboard bus bars tighter, ensuring a secure electrical connection when it is needed most.

Yes, because it utilizes a thermal-magnetic trip unit rather than an electronic trip, the FDA34060 is suitable for DC systems. It is rated for up to 250VDC with a 10kA interrupting capacity.