We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

MERSEN Fuse: Class K5, OT Series, Fast-Acting, 100 A, 250 V AC, 250 V DC - Fast-Acting Blade Fuses
MERSENFast-Acting Blade Fuses

MERSEN Fuse: Class K5, OT Series, Fast-Acting, 100 A, 250 V AC, 250 V DC

The MERSEN OT Series Class K5 Fast-Acting Blade Fuse (MPN OT100) is a non-indicating fuse rated for 100 A at 250 V AC and 250 V DC. This industrial fuse is designed for overcurrent protection in electrical circuits.

SKU 3G-OTH-25427

Also listed as: OT 100 · OT-100

Brand
MERSEN
Item
Fuse: Class K5, OT Series, Fast-Acting, 100 A, 250 V AC, 250 V DC
Category
Fast-Acting Blade Fuses
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
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

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

MERSEN
Manufacturer Part Number
OT100
Series
OT
Type
OT Series, Fast-Acting, 100 A, Non-Indicating
AC
250 V
DC
250 V

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 OT Series Class K5 Fast-Acting Blade Fuse (MPN OT100) is a non-indicating fuse rated for 100 A at 250 V AC and 250 V DC. This industrial fuse is designed for overcurrent protection in electrical circuits.

Frequently Asked Questions

What is the MERSEN OT100 fuse used for?

The MERSEN OT100 is a Class K5 fast-acting blade fuse used for overcurrent protection in industrial electrical circuits. It is rated for 100 A at 250 V AC and 250 V DC, making it suitable for motor branch circuits, control panels, and power distribution equipment.

What are the specifications of the MERSEN OT100 fuse?

The MERSEN OT100 is a non-indicating, fast-acting blade fuse from the OT Series. It is rated for 100 A at 250 V AC and 250 V DC. The manufacturer part number is OT100. It provides Class K5 overcurrent protection for industrial electrical systems.

Where to buy MERSEN OT100 fuse worldwide?

3G Electric supplies the MERSEN OT100 fuse to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this fast-acting blade fuse.

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

To select the correct MERSEN OT series fuse, match the voltage rating (250 V AC or DC) and current rating (100 A for the OT100) to your circuit requirements. Ensure the fuse is fast-acting for sensitive electronics. Consult a qualified electrician for proper coordination with your overcurrent protection scheme.

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 blade 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

Compatible alternatives & equivalents

Cross-referenced by specification & description
MERSEN Fuse: Class K5, OT Series, Fast-Acting, 400 A, 250 V AC, 250 V DC, Non-Indicating (MPN OT400)
MERSEN
MERSEN Fuse: Class K5, OT Series, Fast-Acting, 400 A, 250 V AC, 250 V DC, Non-Indicating (MPN OT400)
MERSEN Fuse: Class K5, OT Series, Fast-Acting, 200 A, 250 V AC, 250 V DC, Non-Indicating (MPN OT200)
MERSEN
MERSEN Fuse: Class K5, OT Series, Fast-Acting, 200 A, 250 V AC, 250 V DC, Non-Indicating (MPN OT200)
MERSEN Fuse: Class K5, OT Series, Fast-Acting, 150 A, 250 V AC, 250 V DC, Non-Indicating (MPN OT150)
MERSEN
MERSEN Fuse: Class K5, OT Series, Fast-Acting, 150 A, 250 V AC, 250 V DC, Non-Indicating (MPN OT150)
MERSEN Fuse: Class K5, OT Series, Fast-Acting, 80 A, 250 V AC, 250 V DC, Non-Indicating (MPN OT80)
MERSEN
MERSEN Fuse: Class K5, OT Series, Fast-Acting, 80 A, 250 V AC, 250 V DC, Non-Indicating (MPN OT80)
MERSEN Fuse: Class K5, OT Series, Fast-Acting, 175 A, 250 V AC, 250 V DC, Non-Indicating (MPN OT175)
MERSEN
MERSEN Fuse: Class K5, OT Series, Fast-Acting, 175 A, 250 V AC, 250 V DC, Non-Indicating (MPN OT175)
MERSEN Fuse: Class K5, OT Series, Fast-Acting, 90 A, 250 V AC, 250 V DC, Non-Indicating (MPN OT90)
MERSEN
MERSEN Fuse: Class K5, OT Series, Fast-Acting, 90 A, 250 V AC, 250 V DC, Non-Indicating (MPN OT90)

More from MERSEN

View all MERSEN parts
MERSEN Fuse: Class K5, OTS Series, Fast-Acting, 110 A, 600 V AC, 300 V DC, Non-Indicating (MPN OTS110)
MERSEN
MERSEN Fuse: Class K5, OTS Series, Fast-Acting, 110 A, 600 V AC, 300 V DC, Non-Indicating (MPN OTS110)
MERSEN Fuse: Class K5, OTS Series, Fast-Acting, 400 A, 600 V AC, 300 V DC, Non-Indicating (MPN OTS400)
MERSEN
MERSEN Fuse: Class K5, OTS Series, Fast-Acting, 400 A, 600 V AC, 300 V DC, Non-Indicating (MPN OTS400)
MERSEN Fuse: Class K5, OT Series, Fast-Acting, 350 A, 250 V AC, 250 V DC, Non-Indicating (MPN OT350)
MERSEN
MERSEN Fuse: Class K5, OT Series, Fast-Acting, 350 A, 250 V AC, 250 V DC, Non-Indicating (MPN OT350)
Solar Fuse: HP10J Series, Gen Purpose, 200 A, 1 kV DC (MPN HP10J200EI)
MERSEN
Solar Fuse: HP10J Series, Gen Purpose, 200 A, 1 kV DC (MPN HP10J200EI)
MERSEN Fuse: Class K5, OTS Series, Fast-Acting, 10 A, 600 V AC, 300 V DC, Non-Indicating (MPN OTS100)
MERSEN
MERSEN Fuse: Class K5, OTS Series, Fast-Acting, 10 A, 600 V AC, 300 V DC, Non-Indicating (MPN OTS100)
MERSEN Fuse: Class K5, OTS Series, Fast-Acting, 250 A, 600 V AC, 300 V DC, Non-Indicating (MPN OTS250)
MERSEN
MERSEN Fuse: Class K5, OTS Series, Fast-Acting, 250 A, 600 V AC, 300 V DC, Non-Indicating (MPN OTS250)
Solar Fuse: HP10J Series, Gen Purpose, 100 A, 1 kV DC (MPN HP10J100)
MERSEN
Solar Fuse: HP10J Series, Gen Purpose, 100 A, 1 kV DC (MPN HP10J100)
MERSEN Fuse: Class K5, OT Series, Fast-Acting, 70 A, 250 V AC, 250 V DC, Non-Indicating (MPN OT70)
MERSEN
MERSEN Fuse: Class K5, OT Series, Fast-Acting, 70 A, 250 V AC, 250 V DC, Non-Indicating (MPN OT70)