Revised: January 7, 2009

133

© 2009 Littelfuse, Inc.

Specifications are subject to change without notice.

Radial Lead Fuses

272/273/274/278/279 Series

Please refer to www.littelfuse.com/series/272.html, /273.html, /274.html,

/278.html or /279.html for current information.

MICRO™ > Very Fast-Acting > 272/273/274/278/279 Series

Product Characteristics

Operating Temperature:

273 and 279: –55ºC to +85ºC;

272 and 278: –55ºC to +125ºC

Fuses to MIL SPEC

273 Series is available in CSA LR

29862. Military QPL type (FM02).

To order, change 273 to 274.

Materials

272 and 278 series cap:

Nickel Plated Brass

273, 274 and 279 series cap:

Mirror polished Polycarbonate

Base: R-4 Ryton

Pins: Tin Plated Copper

Product Marking

Current and voltage ratings stamped

on cap

Dimensions

7.30

(.29")

(.17")

8.89

(.35")

2.54 (.10")

7.30

(.29")

25.4 (1.0")

2.54 (.10")

25.4 (1.0")

2.54 (.10")

5.97

(.235")

6.35

(.25")

5.97

(.235")

2.54 (.10")

8.89

(.35")

6.35

(.25")

272 000 Series

273 000 and 274 000 Series

278 000 Series

279 000 Series

(Short Lead, Metal Cap)

(Short Lead, Clear Plastic Cap)

(Long Lead, Metal Cap)

(Long Lead, Clear Plastic Cap)

NOTE: Amperage and voltage rating stamped on cap.

Leads are tin plated copper; .025" diameter.

(.17")

4.32

4.32

Part Numbering System

0273 xxxx V

Packaging Code

Amp. Code

Series

Refer to Amp Code column of

Electrical Characteristics Table

V = 5

H = 100

Packaging

Packaging Option

Packaging Specification

Quantity

Quantity &

Packaging Code

Bulk

N / A

5

V

Bulk

N / A

100

H