Is this a replacement for littelfuse flu 44/100?

Looking at the spec sheets I would say yes. They are both the same size with the same specs and are specially designed for multimeter protection. There are also 11A versions of these fuses that are the same diameter but are a little longer.

The description says dmm 44/100 but the picture shows dmm-b- 44/100. which is it?

The fuses I received were the dmm-b-44/100 variety. According to one reference I found the only difference between the variety that have -b and those that don't is that the -b variety are those sold to Fluke and those without are sold to the general market. There are no other physical differences.

What are the dimensions of this item

Dimension: 34.9 mm (1.375 In.) L x 10 mm (0.406 In.) D

Will this replace my fluke 85v 400 milliamp fuse?

To the best of my knowledge, yes. I only use Fluke handheld multimeters and this is why I bought these fuses.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Pack of 5 pieces, DMM-44/100 (DMM 44 100) 440mA (0.4A) 1000V Fluke 943121 Digital multimeter replacement Fuse

Pack of 5 pieces, DMM-44/100 (DMM 44 100) 440mA (0.4A) 1000V Fluke 943121 Digital multimeter replacement Fuse

Product ID: 12647513

Details

Brand
Fluke Networks
Power Source
Corded
Style
Digital
Color
silver
Item Weight
23 Grams

⚡1000V max voltage rating

🔋440mA current capacity

🛡️CEUL safety certified

Description

⚡ Stay powered, stay protected — fuse your way to flawless measurements!

BULK PACK CONVENIENCE - Set of 5 fuses ensures you're always ready for quick replacements, minimizing downtime.
HIGH VOLTAGE ENDURANCE - Withstands up to 1000V DC for reliable protection in demanding environments.
SEAMLESS COMPATIBILITY - Specifically designed for Fluke 943121 digital multimeters, ensuring perfect fit and performance.
CERTIFIED SAFETY ASSURANCE - CEUL recognized for guaranteed compliance and peace of mind.
PRECISION CURRENT HANDLING - Rated at 440mA to safeguard your digital multimeter without compromising accuracy.

This pack of 5 DMM-44/100 replacement fuses is engineered for Fluke 943121 digital multimeters, rated at 440mA and 1000V DC. CEUL recognized for safety, these fuses provide reliable, high-voltage protection to keep your precision tools running smoothly and securely.

Specifications

ASIN	B00MUYQPX0
Best Sellers Rank	#1,010,271 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4,939 in Cartridge Fuses
Brand	Fluke Networks
Brand Name	Fluke Networks
Color	silver
Customer Reviews	4.8 out of 5 stars 268 Reviews
Item Weight	23 Grams
Manufacturer	Fluke/Bussmann
Measurement Type	Multimeter
Model	943121
Part Number	LEPUSPTLSHI161
Power Source	Battery Powered
Style	Digital
Style Name	Digital
UPC	631908879773

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