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: OTM Series, Midget, Fast-Acting, 20 A, 250 V AC, 13/32 in x 1 1/2 in - Fast-Acting Cylindrical Fuses
MERSENFast-Acting Cylindrical Fuses

MERSEN Fuse: OTM Series, Midget, Fast-Acting, 20 A, 250 V AC, 13/32 in x 1 1/2 in

The MERSEN OTM Series is a fast-acting cylindrical fuse, specifically a midget fuse rated at 20 A and 250 V AC. It features a non-indicating design with dimensions of 13/32 in x 1 1/2 in, identified by manufacturer…

SKU 3G-OTH-133975

Brand
MERSEN
Item
Fuse: OTM Series, Midget, Fast-Acting, 20 A, 250 V AC, 13/32 in x 1 1/2 in
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
OTM20
Type
Midget, Fast-Acting, 20 A, 13/32 in x 1 1/2 in, Non-Indicating
AC
250 V
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 OTM Series is a fast-acting cylindrical fuse, specifically a midget fuse rated at 20 A and 250 V AC. It features a non-indicating design with dimensions of 13/32 in x 1 1/2 in, identified by manufacturer part number OTM20.

Frequently Asked Questions

What is the MERSEN OTM20 fuse used for?

The MERSEN OTM20 is a fast-acting midget fuse rated at 20 A and 250 V AC. It protects sensitive electronic circuits and equipment from overcurrent by opening quickly during a fault. Common applications include control panels, power supplies, and instrumentation where precise, rapid protection is required.

What are the specifications of the MERSEN OTM20 fuse?

The MERSEN OTM20 is a fast-acting, non-indicating midget fuse rated at 20 A and 250 V AC. It has a cylindrical body measuring 13/32 in x 1 1/2 in and belongs to the OTM Series. The manufacturer part number is OTM20, and it is designed for overcurrent protection in industrial circuits.

Where to buy the MERSEN OTM20 fuse worldwide?

3G Electric supplies the MERSEN OTM20 fuse to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us for pricing and lead time on this fast-acting midget fuse rated at 20 A and 250 V AC.

How to select the right MERSEN OTM series fuse for my application?

To select the correct MERSEN OTM series fuse, match the voltage rating (250 V AC) and current rating (20 A for OTM20) to your circuit requirements. Ensure the fast-acting characteristic suits your load's inrush current. Verify the physical dimensions (13/32 in x 1 1/2 in) fit your fuse holder. Consult MERSEN's application notes for guidance.

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: OTM Series, Midget, Fast-Acting, 25 A, 250 V AC, 13/32 in x 1 1/2 in, Non-Indicating (MPN OTM25). Key specifications — attr1287209: OTM; attr211192: MERSEN.
MERSEN
MERSEN Fuse: OTM Series, Midget, Fast-Acting, 25 A, 250 V AC, 13/32 in x 1 1/2 in, Non-Indicating (MPN OTM25). Key specifications — attr1287209: OTM; attr211192: MERSEN.
MERSEN Fuse: OTM Series, Midget, Fast-Acting, 15 A, 250 V AC, 13/32 in x 1 1/2 in, Non-Indicating (MPN OTM15). Key specifications — attr1287209: OTM; attr211192: MERSEN.
MERSEN
MERSEN Fuse: OTM Series, Midget, Fast-Acting, 15 A, 250 V AC, 13/32 in x 1 1/2 in, Non-Indicating (MPN OTM15). Key specifications — attr1287209: OTM; attr211192: MERSEN.
MERSEN Fuse: OTM Series, Midget, Fast-Acting, 10 A, 250 V AC, 13/32 in x 1 1/2 in, Non-Indicating (MPN OTM10). Key specifications — attr1287209: OTM; attr211192: MERSEN.
MERSEN
MERSEN Fuse: OTM Series, Midget, Fast-Acting, 10 A, 250 V AC, 13/32 in x 1 1/2 in, Non-Indicating (MPN OTM10). Key specifications — attr1287209: OTM; attr211192: MERSEN.
MERSEN Fuse: OTM Series, Midget, Fast-Acting, 5 A, 250 V AC, 13/32 in x 1 1/2 in, Non-Indicating (MPN OTM5). Key specifications — attr1287209: OTM; attr211192: MERSEN.
MERSEN
MERSEN Fuse: OTM Series, Midget, Fast-Acting, 5 A, 250 V AC, 13/32 in x 1 1/2 in, Non-Indicating (MPN OTM5). Key specifications — attr1287209: OTM; attr211192: MERSEN.
MERSEN Fuse: OTM Series, Midget, Fast-Acting, 1 A, 250 V AC, 13/32 in x 1 1/2 in, Non-Indicating (MPN OTM1). Key specifications — attr1287209: OTM; attr211192: MERSEN.
MERSEN
MERSEN Fuse: OTM Series, Midget, Fast-Acting, 1 A, 250 V AC, 13/32 in x 1 1/2 in, Non-Indicating (MPN OTM1). Key specifications — attr1287209: OTM; attr211192: MERSEN.
MERSEN Fuse: OTM Series, Midget, Fast-Acting, 3 A, 250 V AC, 13/32 in x 1 1/2 in, Non-Indicating (MPN OTM3). Key specifications — attr1287209: OTM; attr211192: MERSEN.
MERSEN
MERSEN Fuse: OTM Series, Midget, Fast-Acting, 3 A, 250 V AC, 13/32 in x 1 1/2 in, Non-Indicating (MPN OTM3). Key specifications — attr1287209: OTM; attr211192: MERSEN.

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.