Product Overview
Federal Pacific 4102AU14 AC Magnetic Contactor Starter NEMA Size 1 600V
Condition
Unused new old stock (NOS). Markings legible on front plate: FPE A.C. MAGNETIC STARTER NEMA SIZE 1, CLASS 4102, STYLE AU14, 600 V.A.C. MAX., Y9389X. Stamped steel baseplate shows clean dichromate plating with rubber grommets intact.
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Product Overview
Federal Pacific 4102AU14 (catalog number 501U151-86) provides open-frame line-voltage AC magnetic motor switching rated up to 600 VAC. Built on a heavy dichromate-plated steel baseplate, the assembly features five main power poles and a side-mounted auxiliary interlock contact block. A 115 VAC 60 Hz operating coil (Code 86) controls actuation. Horsepower ratings cover up to 3 HP single-phase or 7.5 HP polyphase at 220 VAC, and up to 5 HP single-phase or 10 HP polyphase at 440/550 VAC.
Key Features
- NEMA Size 1 open-frame contactor mechanism rated up to 600 VAC maximum
- Equipped with Coil Code 86 rated for 115 VAC 60 Hz control circuits
- 5 main power poles with slotted terminal screw clamps
- Polyphase motor ratings: 3 HP at 110V, 7.5 HP at 220V, 10 HP at 440/550V
- Single-phase motor ratings: 2 HP at 110V, 3 HP at 220V, 5 HP at 440/550V
- Side-mounted auxiliary interlock contact block with screw terminals
- Stamped steel baseplate with rubber grommets for panel mounting
Applications
- Replacing damaged contactor assemblies inside vintage industrial motor control centers
- Controlling industrial shop equipment including lathes, mill spindles, and heavy dust collectors
- Panel builders constructing dedicated remote start-stop stations for 220V or 460V three-phase motors
- Shop builds repurposing vintage industrial contactors for high-current workshop isolation banks
Frequently Asked Questions
What coil voltage does this starter require?
The installed coil is marked Code 86, which is rated for 115 VAC at 60 Hz control circuits.
Does this unit include built-in thermal overload relays?
Not included. This assembly is an open-frame contactor with auxiliary contacts on a baseplate; overload blocks or external heater elements are not present on the frame.
How do the catalog number and style markings correspond?
The metal front nameplate is stamped Class 4102 Style AU14, which corresponds directly to Federal Pacific catalog number 501U151-86.
What mounting footprint does this open starter use?
It mounts via the stamped steel baseplate using standard panel-mount keyhole slots and grommeted through-holes, matching legacy FPE Size 1 cabinet footprints.
Built back when contactors carried real mass and mechanical authority, ready to drop straight into a vintage control cabinet and get a motor spinning again.
