RectorSeal M81140 40A RK5 600V Time Delay Fuse 5-1/2″ Class R

SKU: M81140

Weight	1 lbs
Dimensions	8 × 8 × 8 in
Condition	New
Manufacturer Part Number	M81140
Brand	The Rectorseal Corporation

$47.24

In stock — available to order.

Sold individually. Each quantity ordered is one unit. Kits are one complete kit; products sold by length use the stated length unit.

Same-item volume pricing

Quantity	Unit price	Saving
1–4	$47.24	0%
5–9	$44.88	5%
10+	$42.52	10%

Estimate for this quantity before shipping. Tax display follows store settings. Existing cart quantities can increase the tier. Only one offer applies; a coupon replaces automatic pricing. For 20+ units, contact support for a quote.

Available to order.

Bulk quantity & quote

Quantity needed

Enter the total quantity you need. We will confirm availability and a quote before you order.

Need a firm ship date? Availability may include supplier stock. Confirm availability before ordering for time-sensitive work.

RectorSeal M81140 40A RK5 600V Time Delay Fuse 5-1/2" Class R

Specifications & product details

RectorSeal M81140 40 Amp RK5 600V Time Delay Cartridge Fuse

The RectorSeal M81140 is a 40 Amp RK5 Class R dual-element time delay fuse designed for superior motor branch circuit and transformer protection in commercial and industrial electrical systems.

Rated at 600 Volts, this current-limiting fuse provides enhanced overload protection and excellent cycling capability, making it ideal for HVAC systems, compressors, pumps, and heavy-duty motor applications.

Specifications:

40 Amp
600 Volt rating
RK5 / Class R
Dual element time delay design
5-1/2″ length x 1″ diameter
Copper end caps with ceramic body

Performance Benefits:

Allows temporary motor inrush current without nuisance blowing
Superior overload protection
Replaces TRS, ECRS, FRSR, FLSR series fuses
Ideal for HVAC, industrial panels, and motor-driven equipment

Designed for professional electrical contractors and industrial maintenance applications requiring dependable circuit protection.

Compatibility & part-number help

Match the manufacturer part number and equipment model to the listing. Check connection sizes, fuel type, pressure or capacity, voltage and dimensions where applicable. A similar appearance or part number alone does not confirm compatibility.

For help, send a parts inquiry with the part number, equipment model, label photos and quantity. Manufacturer documents and item-specific information, when supplied, are in the product details above.

Shipping & availability

Availability may include our inventory and supplier sources. Listed stock does not by itself confirm immediate dispatch. Ask us to confirm a ship date before ordering for time-sensitive work.

Shipping methods and charges appear at checkout where available. Freight, oversized and specially handled items may require a quote. See our Shipping Policy for processing periods, restrictions and delivery information.