NOARK Ex9RD25A8 Thermal Overload Relay 5.5-8A, Trip Class 10A, for Ex9CD09-32 Contactors

Part number: Ex9RD25A8

Alt reference: NR2-25G/5.5-8

Packaging: Ex9RD25A8, qty 1

Meta description: NOARK Ex9RD25A8 thermal overload relay with adjustable range 5.5-8A and Trip Class 10A protection. Designed for use with NOARK Ex9CD09-32 contactors. UL Listed and CSA certified, IEC/EN 60947-4-1 and CE compliant.

What is this product

This is a thermal overload relay used to protect motors from overload conditions by tripping when motor current exceeds the set range. The Ex9RD25A8 mounts with compatible NOARK contactors, providing coordinated motor protection in starters and motor control circuits.

TL;DR: Who is this for

- Electricians and industrial contractors building or repairing motor starters that use NOARK Ex9CD series contactors

- Maintenance teams replacing an overload relay where the motor full-load amps fall between 5.5A and 8A

- Panel builders and OEMs standardizing on NOARK Ex9RD overloads for UL and IEC style motor control assemblies

Institutional Fit

- Good for facilities running multiple small motors where consistent overload protection reduces nuisance trips and motor damage

- Supports preventive maintenance programs by allowing precise FLA setting within the 5.5-8A range

- Useful in industrial and commercial motor control panels that require UL and CSA compliance evidence

Technical Specifications

Regulatory Compliance

- UL Listed (File E353865) and CSA certified for Canada support compliant installations in many motor control panel applications

- Designed to align with IEC/EN 60947-4-1 motor control standards and CE requirements

- Always confirm local code requirements and panel listing needs before installation

Durability and Lifecycle

- Thermal overload protection helps reduce motor overheating damage and extends motor life when correctly sized and set

- Trip Class 10A is commonly used for general motor loads where normal starting currents are expected

- Proper adjustment to motor nameplate FLA reduces nuisance tripping while maintaining protection

Procurement notes

- Range check is the key decision: your motor full-load amps should fall between 5.5A and 8A

- Compatibility check: confirm your contactor is in the Ex9CD09-32 range for proper mechanical and electrical fit

- Starter design: verify your control scheme and overload contact requirements (aux contacts, reset style) match your application

- If you are replacing an existing overload, match both the setting range and the mounting family, not just the amps

FAQ

What does a thermal overload relay do?
It protects a motor by tripping when current stays above the set point long enough to indicate overload, helping prevent overheating.

What current range does this model cover?
Adjustable from 5.5A to 8A.

What contactors does it work with?
It is specified for use with NOARK Ex9CD09-32 contactors.

What is Trip Class 10A?
It indicates a standard overload trip characteristic commonly used for general motor protection. Confirm the required trip class for your load if you have high inertia or special starting conditions.

Is it approved for Canada?
Yes, it is certified for Canada according to CSA standards, and it is UL Listed.

What if my motor FLA is outside 5.5-8A?
You need a different overload range. Send the motor nameplate photo showing FLA, plus your contactor model, and we will match the correct relay.