Cutler-Hammer C825KN10 200A 3-Pole Contactor

Description

Key Technical Specifications

A dedicated C825KN10 listing specifies 200 A, 600 VAC, 3 poles, 120 V/60 Hz coil, and NEMA Size 4. Another listing identifies the Series A2 version and reports the C320KB8 base auxiliary contact.

Identification warning: Some online sources incorrectly classify C825KN10 as an MCCB. The stronger exact-part-number records identify it as a contactor, and contact-kit suppliers also list C825KN10 specifically as a compatible contactor.

Product Introduction

The Cutler-Hammer C825KN10 is a Size 4 NEMA magnetic contactor rated at 200 A and 600 VAC, with a documented 120 VAC, 60 Hz coil. It is a three-pole full-voltage non-reversing contactor intended for switching large industrial motor or electrical loads.

For legacy equipment replacement, the coil voltage and complete contactor configuration matter as much as the 200 A rating. The Series A2 designation, auxiliary-contact arrangement, line/load terminals, and mounting dimensions should be matched before installing a replacement.

C825KN10

C825KN10

Installation & Configuration Guide

Stage 1 — Pre-Installation

1. Record the complete contactor identification: C825KN10.
2. Verify the coil marking and confirm 120 VAC, 60 Hz where applicable.
3. Record the existing auxiliary-contact arrangement.
4. Photograph all line, load, coil, and auxiliary wiring.
5. Verify the motor full-load current against the contactor’s applicable rating.
6. Confirm the replacement has the same NEMA size and mounting arrangement.

⚠️ Do not select a replacement solely because it is rated 200 A. Coil voltage, pole configuration, utilization category, auxiliary contacts, and physical arrangement must also match.

Stage 2 — Removal

1. Stop the controlled equipment.
2. Open and lock out the upstream disconnect.
3. Verify absence of voltage on the line and load terminals.
4. Verify the control circuit is de-energized.
5. Label all conductors before disconnecting them.
6. Disconnect the coil and auxiliary wiring.
7. Remove the line/load conductors.
8. Remove the contactor mounting hardware.

⚠️ A 200 A contactor can be connected to circuits with substantial fault energy. Follow the plant’s electrical safety and lockout/tagout procedures.

Stage 3 — Installation and Wiring

1. Inspect the replacement contactor for mechanical or terminal damage.
2. Confirm and the correct coil configuration.
3. Mount the contactor in the original position.
4. Connect the three incoming phases to the line terminals.
5. Connect the motor/load conductors to the corresponding load terminals.
6. Connect the 120 VAC control circuit to the coil terminals according to the control schematic.
7. Reconnect auxiliary contacts according to the original control logic.
8. Tighten all terminals to the applicable Eaton specification.

Stage 4 — Commissioning

1. Keep the motor/load in a controlled state during the initial test.
2. Energize the control circuit.
3. Verify that the contactor pulls in correctly.
4. Confirm all three main poles close properly.
5. Check auxiliary-contact feedback.
6. Verify motor phase sequence where applicable.
7. Measure operating current under normal load.
8. Check for abnormal contactor heating, chatter, or excessive coil noise.
9. Test stop, start, overload, and interlock functions.

Estimated replacement time: approximately 1–2 hours for an accessible like-for-like replacement, excluding troubleshooting of the surrounding motor-control circuit.

⚠️ Critical: Never apply 120 VAC to the coil until the actual coil marking has been confirmed. Different C825 configurations can use different control-voltage arrangements.

FAQ

What is the Cutler-Hammer ?

The is a NEMA Size 4, three-pole magnetic contactor from the Cutler-Hammer/Eaton product family. Available records specify a 200 A main rating and 600 VAC application rating.

What is the coil voltage?

The exact records reviewed specify a 120 VAC, 60 Hz coil. One listing identifies the coil as part 9-1891-1.

What is the current rating?

The documented main rating is 200 A. The appropriate application rating still depends on the load type, motor characteristics, utilization category, and applicable electrical code.

Is a circuit breaker?

No. The exact-part-number evidence identifies it as a contactor, not an MCCB. Separate contact-kit listings specifically identify as a compatible Cutler-Hammer contactor.

What does Size 4 mean?

NEMA Size 4 is the contactor/starter size classification. It is not a substitute for checking the actual motor current, application category, coil voltage, and contactor ratings.

Is the obsolete?

The exact model appears primarily in legacy and secondary-market inventory. Related C825KN10A records are explicitly marked discontinued by the manufacturer, while current suppliers continue to list as surplus/reconditioned equipment. Therefore, verify current OEM status and actual stock condition before procurement.

Can another 200 A contactor replace ?

Not automatically. Verify the 200 A rating, 600 VAC application, three-pole configuration, 120 VAC coil, NEMA Size 4 dimensions, auxiliary contacts, terminal arrangement, and application rating before selecting an alternative.

Verify precise compatibility with the contactor nameplate, motor-control schematic, coil voltage, load current, and applicable electrical standards before installation.