How do I know which cartridge fuse amp rating to buy for my motor?

Match the amp rating printed on your existing fuse or specified by your equipment documentation. This Eaton Bussmann FRS-R-40 fuse is rated for 40A and 600V AC, suitable for heavy-duty motors. Confirm both the amperage and voltage figures, plus the physical size, so the replacement fits your holder correctly. For sensitive electronics, a fast-acting fuse might be better.

What is the difference between time-delay and fast-acting cartridge fuses for motors?

Time-delay fuses, like this Eaton Bussmann FRS-R-40, tolerate brief inrush currents common in motor startups, preventing nuisance tripping. Fast-acting fuses trip quickly to protect sensitive electronics. This fuse's dual-element design allows startup surges but protects against sustained overloads and short circuits, ideal for motor protection.

Is this Eaton Bussmann fuse suitable for Indian electrical systems?

Yes, this 600V AC fuse is compatible with Indian mains voltage (typically 230V AC). Ensure the physical dimensions match your existing fuse holder. All customs duties and GST are included in the price, and delivery is via ExpressBox tracked shipping, arriving 14-16 days.

How to buy an original Eaton Bussmann fuse in India?

Purchase this Eaton Bussmann FRS-R-40 fuse from crowcrowcrow.com, sourced directly from authorized US retailers and brand partners. It is factory-sealed, imported per-order, with all duties and GST included. Delivery is via ExpressBox tracked shipping for your peace of mind.

What are the benefits of a dual-element time-delay fuse?

A dual-element time-delay fuse, like the Bussmann FRS-R-40, offers enhanced protection by separating overload and short-circuit elements. This allows it to withstand temporary motor startup surges without blowing, while still providing rapid response to dangerous short circuits and sustained overloads, preventing equipment burnout.

Eaton Bussmann FRS-R-40 RK5 Class Fuse 40A 600V AC

Name: Eaton Bussmann FRS-R-40 RK5 Class Time-Delay Fuse 40A 600V AC | UL Listed Motor Protection
Brand: Bussmann
SKU: wpv4544
Price: 3333.00 INR
Availability: InStock

About this item

The Eaton Bussmann FRS-R-40 is a UL Listed Class RK5 time-delay fuse, engineered for robust motor protection in demanding industrial and commercial settings. Its dual-element design effectively manages motor startup current surges while safeguarding against sustained overloads and short circuits, preventing equipment burnout. This fuse is crucial for applications like power panelboards, motor control centers, and machinery disconnects, ensuring reliable operation and extended equipment life. Imported from authorized US retailers, it offers a genuine alternative to local options.

This fuse features a 40A current rating and a 600V AC voltage rating, with a high interrupting rating of 200kA. The time-delay capability allows for temporary inrush currents without tripping, a critical feature for motors and transformers. Constructed from durable brass and fiberglass, it is designed for through-hole mounting and fits Class H, K, or R fuse blocks. Its dimensions are 5.5 inches in length, 1 inch in width, and 1 inch in height.

For Indian buyers, this fuse provides reliable protection for heavy-duty circuits. While local fuses may offer basic protection, the Bussmann FRS-R-40's specific dual-element time-delay mechanism offers enhanced safety and longevity for motors. All customs duties and GST are included in the price, with delivery via ExpressBox tracked shipping. 14-16 days.

Key Features

Made in Mexico

Why choose this product

Engineered for Industrial Motor Safety

The Bussmann FRS-R-40 fuse is specifically engineered with a dual-element, time-delay Class RK5 design. This advanced technology ensures your motors receive optimal protection by allowing the initial startup current surge to pass safely, preventing nuisance tripping. Simultaneously, it offers fast-acting short-circuit protection and guards against sustained overloads that can lead to motor burnout. Unlike generic fuses, this UL-listed component provides a high interrupting rating of 200kA, offering a critical safety margin for heavy-duty industrial and commercial applications. It's a genuine, imported solution for reliable electrical system integrity.

Ideal for Heavy Loads, Skip for Electronics

This fuse is ideal for protecting motors, transformers, power panelboards, and motor control centers where temporary inrush currents are common. It is best suited for industrial, commercial, and agricultural applications requiring robust overload and short-circuit protection. However, it is not recommended for sensitive electronic circuits that require extremely fast-acting protection without any tolerance for inrush current. For such applications, a fast-acting fuse with a lower interrupting rating might be more appropriate.

How to use

Ensure Power is Off — Before replacing any fuse, always switch off the main power supply to the circuit or equipment to prevent electrical shock. Verify the circuit is de-energized.
Identify and Remove Old Fuse — Locate the blown fuse in the fuse holder or panel. Note its amp rating, voltage rating, and class type. Carefully remove the old fuse using an insulated fuse puller or by hand if safe.
Install New Fuse — Insert the new Eaton Bussmann FRS-R-40 fuse, ensuring it matches the old fuse's specifications (40A, 600V AC, Class RK5). Push it firmly into the fuse holder or block until it is securely seated.
Restore Power and Test — Turn the main power supply back on. If the fuse is correctly installed and the circuit is functioning properly, the equipment should operate normally. If the new fuse blows immediately, consult a qualified electrician.

Example scenarios

Typical situations where Eaton Bussmann FRS-R-40 RK5 Class Time-Delay Fuse 40A 600V AC | UL Listed Motor Protection helps — illustrative scenarios, not customer reviews.

Scenario 1

Illustrative example

Where it helps

Protecting a 15HP motor in a factory in Chennai during monsoon season, where power fluctuations can occur.

How this product helps

The Eaton Bussmann FRS-R-40's dual-element time-delay design handles startup surges and protects against overloads caused by voltage dips, preventing motor burnout. Its 600V AC rating and 200kA interrupting capacity ensure safety under demanding conditions.

Specifications & installation

Specifications

Current Rating	40 Amps
Voltage Rating	600 Volts AC
Interrupting Rating	200 kA
Fuse Class	Class RK5, Class R
Type	Time-Delay, Dual-Element
Indicator	Non-Indicating

Installation & usage

Application	Motor protection, power panelboards, motor control centers, machinery disconnects, safety switches
Serving Size	N/A
Cost per use	N/A
Shelf life after opening	N/A
Reapplication math	N/A
Contraindications	Not for sensitive electronic circuits requiring fast-acting protection without inrush tolerance.
Allergens / common irritants	Contains lead (California Proposition 65)

How we compare

Feature	Eaton Bussmann FRS-R-40	Others
Protection Type	Dual-element, time-delay Class RK5 for superior motor overload & short-circuit protection.	Local fuses may offer basic overload protection; specific dual-element time-delay types vary by brand and availability.
Voltage Rating	600V AC	Local fuses typically available in 250V AC and 400V AC; 600V AC options may be less common or specialized.
Interrupting Rating	200 kA (UL Listed)	Interrupting ratings vary widely; high-capacity ratings like 200kA are less common in standard local offerings.
Cost per Unit	1 unit — ₹3,333 per unit	Local fuses may range from ₹100-₹500+ depending on rating and brand.
Certification	UL Listed Class R	Local fuses may have BIS or IEC certification; verify specific marks.

SKU	wpv4544
GTIN	00051712508360
Brand	Bussmann
Model Number	FRS-R-40
Part Number	FRS-R-40
Item Type Keyword	cartridge-fuses
Color	Green
Material	Brass, Fiberglass
Mounting Type	Through-Hole Mount
Dimensions (L x W x H)	5.5 inches x 1 inch x 1 inch
Item Thickness	1 inch
Country of Origin	Made in Mexico

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Eaton Bussmann FRS-R-40 RK5 Class Time-Delay Fuse 40A 600V AC | UL Listed Motor Protection

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