Mfr Part #:

03420104HX040

Littelfuse Inc. 03420104HX040 is a fuseholder knob designed for 3AG and SFE fuses. It offers a 20A electrical rating and 250V voltage rating.

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03420104HX040 Specifications Quick View

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Category	Accessories
Manufacturer Name	Littelfuse Inc.
Accessory Type	Knob
For Use With	3AG, SFE
Mounting Type	Panel Mount
Voltage Rating	250V

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03420104HX040 Description

Short technical summary and product information.

The Littelfuse Inc. 03420104HX040 is a fuseholder knob, part of the 342 Series. This accessory is compatible with 3AG and SFE fuses, providing a secure and reliable connection.

Key electrical specifications include a rating of 20 amperes and a voltage rating up to 250 volts. The fuseholder is designed for panel mounting and offers an ingression protection rating of IP40 for general applications. For watertight applications, an O-ring seal is available, providing IP67 protection.

Molded parts are constructed from black thermoplastic or thermoset materials, both rated UL94 V-0 for flammability. Terminals are made of copper and copper alloy, tin-plated, with 1/4" Quick-Connect terminals being nickel-plated. The operating ambient temperature range is -40°C to +85°C.

03420104HX040 Quick Information

Product Type: Fuseholder Knob

Series: 342 Series

Canonical Name: Littelfuse Inc. 342 Series Fuseholder Knob

Subcategory: Knob

03420104HX040 Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

03420104HX040 Features

Fuseholder knob for 3AG/SFE fuses.
Rated for 20 amperes and 250 volts.
Panel mount design.
Available in IP40 and IP67 ratings.
UL94 V-0 flammability rating.

03420104HX040 Applications

Suitable for general circuit protection.
Used in applications requiring panel mounting.
Ideal for systems with 3AG or SFE fuses.
Can be used in environments needing IP40 protection.
Watertight versions available for demanding conditions.

03420104HX040 FAQs

7 frequently asked questions generated from this part’s specifications.

What is the current rating of this fuse holder knob?

20A.

What is the voltage rating?

Up to 250V.

What type of fuse does it support?

3AG/AB fuses.

What is the mounting type?

Panel mount.

What is the operating temperature range?

-40°C to +85°C.

What is the dielectric strength?

2400V minimum (1500V minimum for some variants).

What is the flammability rating of the molded parts?

UL94 V-0.