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MERSEN OT300 Fast-Acting Blade Fuse, 300 A, 250 V AC/DC, Class K5 - Fast-Acting Blade Fuses
MERSENFast-Acting Blade Fuses

MERSEN OT300 Fast-Acting Blade Fuse, 300 A, 250 V AC/DC, Class K5

The MERSEN OT Series Class K5 Fast-Acting Blade Fuse (MPN OT300) is a non-indicating fuse rated for 300 A at 250 V AC and 250 V DC. This industrial fuse is designed for overcurrent protection in electrical circuits.

SKU 3G-OTH-25466

Also listed as: OT 300 · OT-300

Brand
MERSEN
Item
OT300 Fast-Acting Blade Fuse, 300 A, 250 V AC/DC, Class K5
Part Number
OT300
Category
Fast-Acting Blade Fuses
Available to Order
Also known as:OT300MERSEN
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Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

MERSEN
Manufacturer Part Number
OT300
Series
OT
Type
OT Series, Fast-Acting, 300 A, Non-Indicating
AC
250 V
DC
250 V

Technical Documents

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

Product Description

The MERSEN OT Series Class K5 Fast-Acting Blade Fuse (MPN OT300) is a non-indicating fuse rated for 300 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 OT300 fuse used for?

The MERSEN OT300 is a Class K5 fast-acting blade fuse used for overcurrent protection in industrial electrical circuits. It is rated 300 A at 250 V AC and 250 V DC, making it suitable for protecting motors, transformers, and other equipment in manufacturing and power distribution systems.

What are the specifications of the MERSEN OT300 fuse?

The MERSEN OT300 is a non-indicating, fast-acting blade fuse from the OT Series. It has a current rating of 300 A and a voltage rating of 250 V AC and 250 V DC. The manufacturer part number is OT300, and it is classified as a Class K5 fuse for overcurrent protection.

Where to buy MERSEN OT300 fuse worldwide?

3G Electric supplies the MERSEN OT300 fuse worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we source and deliver this fuse to any country.

How to select the right MERSEN OT300 fuse for my application?

To select the MERSEN OT300, verify your circuit's voltage (250 V AC or DC) and continuous current (300 A). Ensure the fuse is fast-acting for sensitive equipment. Consult a qualified electrician to confirm the interrupting rating matches your system's fault current. Always follow local electrical codes.

Used in

Common applications for MERSEN
Industrial control panels — Mersen USCC1 and USCC2 UL Class CC fuse blocks for DIN rail mounting and finger-safe branch circuit protection.
Motor starters — Mersen ATQ time-delay fuses and DAR0 R-rated fuses for motor overload and short-circuit protection.
Power supplies and instrumentation — Mersen GGM and GSB fast-acting cylindrical fuses for overcurrent protection in compact electronic circuits.
DC systems — Mersen A30QS very-fast-acting square fuses rated 300 V DC for semiconductor and DC equipment protection.
Medium-voltage distribution — Mersen DAR0 R-rated fuses rated 5.08 kV AC for general-purpose overcurrent protection with visual indication.
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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.

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