DMM-44/100 BUSSMANN MULTIMETER FUSE

DMM-44/100 BUSSMANN MULTIMETER FUSE – High-Interrupting $0.44text{A}$ $1000text{VAC/VDC}$ Fast-Acting Instrument Fuse

The DMM-44/100 BUSSMANN MULTIMETER FUSE (Model DMM-B-44/100 / DMM-44/100) is a specialized, high-interrupting fast-acting instrument fuse engineered specifically for digital multimeters (DMMs) and electrical test equipment. Manufactured by Eaton’s Bussmann series, this $0.44text{-amp}$ ( $440text{mA}$ ), $1000text{V}$ fuse provides critical overcurrent and short-circuit protection for milliamp and microamp measurement inputs across professional diagnostic tools.

Designed to protect both the technician and sensitive meter circuitry, the DMM-44/100 BUSSMANN MULTIMETER FUSE features an exceptionally high interrupting rating of $10text{ kA}$ at $1000text{ VAC/VDC}$ . In the event of accidental connection to high-energy industrial busbars or power lines while in current measurement mode, this ultra-fast fuse safely quenches severe arc faults inside the instrument. Built in a $10 times 35text{ mm}$ ( $13/32'' times 1-3/8''$ ) cylindrical body filled with high-purity silica sand, it prevents meter explosions and flashovers.

As shown in the image, the fuse features a durable ceramic barrel with distinct blue-and-white labeling reading “BUSS® FUSE 1000V AC/DC 0.44 AMPERE DMM-44/100”, fitted on both ends with nickel-plated brass ferrule caps.

Key Features of the DMM-44/100 BUSSMANN MULTIMETER FUSE

High-Interrupting Voltage Rating: Rated for $1000text{ VAC}$ and $1000text{ VDC}$ with a $10text{ kA}$ interrupting capacity, meeting CAT III $1000text{V}$ and CAT IV $600text{V}$ instrument safety standards.
Fast-Acting Response Speed: Clears overcurrent faults rapidly to prevent delicate internal meter circuitry and shunts from burning out.
Sand-Filled Arc Quenching: Constructed with internal silica sand fill that immediately cools and suppresses electrical arcs during high-voltage short-circuit events.
Precise $440text{mA}$ Current Protection: Specifically calibrated for the low-current $text{mA}/mutext{A}$ measurement ranges of leading digital multimeters.
Standardized $10 times 35text{ mm}$ Size: Industry-standard $10 times 35text{ mm}$ ( $0.406'' times 1.375''$ ) physical dimensions ensure direct replacement compatibility with Fluke® and other major multimeter brands.
Nickel-Plated End Caps: Solid brass end caps with nickel plating ensure low resistance and long-term corrosion resistance.

Common Applications and Practical Usage

The strict safety requirements and precision calibration of the DMM-44/100 BUSSMANN MULTIMETER FUSE make it the standard replacement fuse across test and measurement equipment:

Digital Multimeter $text{mA}/mutext{A}$ Inputs: Serves as the primary protective replacement fuse for $440text{mA}$ input jacks on industrial digital multimeters (including Fluke® 87V, 179, 289, and 1587 series).
Process Calibrators & Signal Injection Tools: Protects precision current loop calibrators, milliamp signal sources, and field service meters.
Electrical Test & Measurement Instruments: Provides high-voltage insulation and fault clearing for portable insulation testers, benchtop multimeters, and electrical analyzers.

Technical Specifications

The core electrical, physical, and compliance parameters for the DMM-44/100 BUSSMANN MULTIMETER FUSE are detailed below:

Parameter Specification	Technical Details & Operational Values
Component Classification	High-Interrupting Fast-Acting Instrument / Multimeter Fuse
Primary Target Keyword	DMM-44/100 BUSSMANN MULTIMETER FUSE
Brand / Series	Eaton Bussmann Series / DMM-B
Catalog Model / Part No.	DMM-B-44/100 / DMM-44/100
Amperage Rating	$0.44text{ Amps}$ ( $440text{ mA}$ )
Voltage Rating	$1000text{ VAC}$ / $1000text{ VDC}$
Interrupt Rating (IR)	$10text{ kA RMS}$ Symmetrical at $1000text{ VAC/VDC}$
Response Characteristic	Fast-Acting / Quick-Acting
Form Factor & Dimensions	Cylindrical Ferrule ( $10 times 35text{ mm}$ / $13/32'' times 1-3/8''$ )
Body Construction	Melamine / Ceramic Tube with Silica Sand Filling
Agency Certifications	UL Recognized (File E19180), CE, RoHS Compliant

Operating Guidelines and Usage Tips

SAFETY NOTICE: Never replace multimeter fuses with general-purpose glass or low-voltage fuses. Using non-specified fuses in high-voltage test meters can lead to arc flash hazards and personal injury.

OEM Specification Matching: Always verify that the replacement fuse matches the exact amperage ( $0.44text{A}$ ) and voltage ( $1000text{V}$ ) specified in your meter’s user manual.

Routine Check: Periodically inspect multimeter fuses using the meter’s internal continuity check mode before performing high-voltage electrical diagnostics.

To review official test equipment safety standards and digital multimeter protection criteria, consult the International Electrotechnical Commission (IEC) Safety Portal.

To check regional warehouse inventory availability or request commercial quotes for volume electrical fuses, visit the Control Qatar Contact Page.

DMM-44/100 BUSSMANN MULTIMETER FUSE