Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
MERSEN Fuse: Class H, RF Series, Fast-Acting, 40 A, 250 V AC - Fast-Acting Cylindrical Fuses
MERSENFast-Acting Cylindrical Fuses

MERSEN Fuse: Class H, RF Series, Fast-Acting, 40 A, 250 V AC

The MERSEN RF Series Fast-Acting Cylindrical Fuse (MPN RF40) is a Class H, 40 A, 250 V AC, non-indicating fuse. This fast-acting fuse is designed for overcurrent protection in industrial electrical circuits.

SKU 3G-OTH-27513

Brand
MERSEN
Item
Fuse: Class H, RF Series, Fast-Acting, 40 A, 250 V AC
Category
Fast-Acting Cylindrical Fuses
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

MERSEN
Manufacturer Part Number
RF40
Series
RF
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

MERSEN Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The MERSEN RF Series Fast-Acting Cylindrical Fuse (MPN RF40) is a Class H, 40 A, 250 V AC, non-indicating fuse. This fast-acting fuse is designed for overcurrent protection in industrial electrical circuits.

Frequently Asked Questions

What is the MERSEN RF40 fuse used for?

The MERSEN RF40 is a Class H, fast-acting cylindrical fuse rated 40 A and 250 V AC. It provides overcurrent protection in industrial electrical circuits, safeguarding equipment like motors, transformers, and control panels from short circuits and overloads.

What are the specifications of the MERSEN RF40 fuse?

The MERSEN RF40 is a fast-acting, non-indicating fuse from the RF Series. It is rated 40 A at 250 V AC and meets Class H standards. The manufacturer part number is RF40, and it is designed for cylindrical fuse holders in industrial applications.

Where to buy the MERSEN RF40 fuse worldwide?

You can source the MERSEN RF40 fuse through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring reliable supply for your maintenance or project needs.

How to select the correct MERSEN RF40 fuse for a circuit?

To select the MERSEN RF40, verify your circuit's voltage does not exceed 250 V AC and the continuous current is at or below 40 A. Ensure the fuse holder accepts Class H cylindrical fuses. For fast-acting protection, match the fuse's interrupting rating to your system's fault current.

Used in

Common applications for MERSEN
Power electronics protection — MERSEN A70Q series semiconductor fuses in variable frequency drives for motor control.
Surge protection for industrial panels — MERSEN STP480D07 SPDs in three-phase 480V AC distribution boards.
Control circuit overcurrent protection — MERSEN ATM series midget fuses in PLC and instrumentation cabinets.
Power distribution in manufacturing — MERSEN FSPDB4A finger-safe blocks in motor control centers for wire management.
DC bus protection in renewable energy — MERSEN A30QS series fuses in solar inverter DC inputs.
High-voltage semiconductor protection — MERSEN A70Q series fuses in welding equipment power supplies.

MERSEN Products

3G Electric supplies MERSEN fast-acting cylindrical fuses. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Similar products

Matched by specification & description
MERSEN Fuse: Class H, RF Series, Fast-Acting, 20 A, 250 V AC, Non-Indicating (MPN RF20). Key specifications — Manufacturer Part Number: RF20; Brand: MERSEN; Series: RF.
MERSEN
MERSEN Fuse: Class H, RF Series, Fast-Acting, 20 A, 250 V AC, Non-Indicating (MPN RF20). Key specifications — Manufacturer Part Number: RF20; Brand: MERSEN; Series: RF.
MERSEN Fuse: Class H, RF Series, Fast-Acting, 5 A, 250 V AC, Non-Indicating (MPN RF5). Key specifications — Manufacturer Part Number: RF5; Brand: MERSEN; Series: RF.
MERSEN
MERSEN Fuse: Class H, RF Series, Fast-Acting, 5 A, 250 V AC, Non-Indicating (MPN RF5). Key specifications — Manufacturer Part Number: RF5; Brand: MERSEN; Series: RF.
MERSEN Fuse: Class H, RF Series, Fast-Acting, 60 A, 250 V AC, Non-Indicating (MPN RF60). Key specifications — Manufacturer Part Number: RF60; Brand: MERSEN; Series: RF.
MERSEN
MERSEN Fuse: Class H, RF Series, Fast-Acting, 60 A, 250 V AC, Non-Indicating (MPN RF60). Key specifications — Manufacturer Part Number: RF60; Brand: MERSEN; Series: RF.
MERSEN Fuse: Class H, RF Series, Fast-Acting, 10 A, 250 V AC, Non-Indicating (MPN RF10). Key specifications — Manufacturer Part Number: RF10; Brand: MERSEN; Series: RF.
MERSEN
MERSEN Fuse: Class H, RF Series, Fast-Acting, 10 A, 250 V AC, Non-Indicating (MPN RF10). Key specifications — Manufacturer Part Number: RF10; Brand: MERSEN; Series: RF.
MERSEN Fuse: Class H, RF Series, Fast-Acting, 50 A, 250 V AC, Non-Indicating (MPN RF50). Key specifications — Manufacturer Part Number: RF50; Brand: MERSEN; Series: RF.
MERSEN
MERSEN Fuse: Class H, RF Series, Fast-Acting, 50 A, 250 V AC, Non-Indicating (MPN RF50). Key specifications — Manufacturer Part Number: RF50; Brand: MERSEN; Series: RF.
MERSEN Fuse: Class H, RF Series, Fast-Acting, 30 A, 250 V AC, Non-Indicating (MPN RF30). Key specifications — Manufacturer Part Number: RF30; Brand: MERSEN; Series: RF.
MERSEN
MERSEN Fuse: Class H, RF Series, Fast-Acting, 30 A, 250 V AC, Non-Indicating (MPN RF30). Key specifications — Manufacturer Part Number: RF30; Brand: MERSEN; Series: RF.

More from MERSEN

View all MERSEN parts →
MERSEN Fuse: GSD Series, Fast-Acting, 2 A, 250 V AC, Non-Indicating, 5 mm x 20 mm (MPN GSD2). Key specifications — Brand: MERSEN; Series: GSD; Equivalent Fuse Series: GDA, S501, 216 & GSD.
MERSEN
MERSEN Fuse: GSD Series, Fast-Acting, 2 A, 250 V AC, Non-Indicating, 5 mm x 20 mm (MPN GSD2). Key specifications — Brand: MERSEN; Series: GSD; Equivalent Fuse Series: GDA, S501, 216 & GSD.
Solar Fuse: HP15MxxR Series, Gen Purpose, 15 A, 1.5 kV DC (MPN HP15M15R). Key specifications — Series: HP15MxxR; Brand: MERSEN.
MERSEN
Solar Fuse: HP15MxxR Series, Gen Purpose, 15 A, 1.5 kV DC (MPN HP15M15R). Key specifications — Series: HP15MxxR; Brand: MERSEN.
MERSEN Fuse: SBS Series, Midget, Fast-Acting, 600 mA, 600 V AC, 13/32 in x 1 3/8 in, Non-Indicating (MPN SBS8/10). Key specifications — attr1287209: SBS; attr211192: MERSEN.
MERSEN
MERSEN Fuse: SBS Series, Midget, Fast-Acting, 600 mA, 600 V AC, 13/32 in x 1 3/8 in, Non-Indicating (MPN SBS8/10). Key specifications — attr1287209: SBS; attr211192: MERSEN.
Solar Fuse: HP15P Series, Gen Purpose, 40 A, 1.5 kV DC (MPN HP15P40). Key specifications — Series: HP15P; Brand: MERSEN.
MERSEN
Solar Fuse: HP15P Series, Gen Purpose, 40 A, 1.5 kV DC (MPN HP15P40). Key specifications — Series: HP15P; Brand: MERSEN.
MERSEN Fuse: GGM Series, Fast-Acting, 2 A, 250 V AC, 5.1 mm x 20.1 mm (MPN GGM2). Key specifications — attr211187: MERSEN; attr1287207: GGM.
MERSEN
MERSEN Fuse: GGM Series, Fast-Acting, 2 A, 250 V AC, 5.1 mm x 20.1 mm (MPN GGM2). Key specifications — attr211187: MERSEN; attr1287207: GGM.
MERSEN Fuse: Class H, RF Series, Fast-Acting, 15 A, 250 V AC, Non-Indicating (MPN RF15). Key specifications — Manufacturer Part Number: RF15; Brand: MERSEN; Series: RF.
MERSEN
MERSEN Fuse: Class H, RF Series, Fast-Acting, 15 A, 250 V AC, Non-Indicating (MPN RF15). Key specifications — Manufacturer Part Number: RF15; Brand: MERSEN; Series: RF.
Solar Fuse: DCT Series, Fast-Acting, 12 A, 1,000 V DC (MPN DCT12-2). Key specifications — Series: DCT; Brand: MERSEN; Voltage Compatability: AC/DC.
MERSEN
Solar Fuse: DCT Series, Fast-Acting, 12 A, 1,000 V DC (MPN DCT12-2). Key specifications — Series: DCT; Brand: MERSEN; Voltage Compatability: AC/DC.
MERSEN Fuse: ATM Series, Midget, Fast-Acting, 500 mA, 600 V AC, 600 V DC, 13/32 in x 1 1/2 in (MPN ATM1/2). Key specifications — attr1287209: ATM; attr211192: MERSEN.
MERSEN
MERSEN Fuse: ATM Series, Midget, Fast-Acting, 500 mA, 600 V AC, 600 V DC, 13/32 in x 1 1/2 in (MPN ATM1/2). Key specifications — attr1287209: ATM; attr211192: MERSEN.