www.littelfuse.com
Axial and Radial Lead Fuses
Subminiature
PICO
®
Fuse Very Fast-Acting Fuse 275/276 Series
ELECTRICAL CHARACTERISTICS:
% of Ampere
Rating
Ampere
Rating
Opening
Time
100% 1/16-30 4 hours, Minimum
200%
1/16-10 5 second, Maximum
12-30 10 seconds, Maximum
AGENCY APPROVALS: Recognized under the Components
Program of Underwriters Laboratories and Certifi ed by CSA.
AGENCY FILE NUMBERS: UL E10480, CSA LR 29862.
INTERRUPTING RATINGS:
300 amperes at rated VDC
50 amperes at rated VAC
ENVIRONMENTALSPECIFICATIONS:
Operating Temperature: –55°C to 125°C.
Shock: MIL-STD-202, Method 213, Test Condition I
(100 G’s peak for 6 milliseconds) and per method 2028 (78 G‘s
peak for 11 millseconds).
Vibration: MIL-STD-202, Method 204A; Test Condition D (vibra-
tions of 10-2000 cps at 20 G‘s).
Insulation Resistance (After Opening): MIL-STD-202, Method
302, Test Condition A (1/2 Megohm minimum).
Moisture Resistance: MIL-STD-202, Method 106.
PHYSICALSPECIFICATIONS:
Materials: Solder-Coated Copper Leads. R
Solderability: MIL-STD-202, Method 208.
Lead Pull Force: MIL-STD-202, Method 211, Test Condition A
(will withstand a 5 lb. axial pull test).
VARIATIONS IN DESIGN: Picofuses which differ from the stan-
dard versions as presented on this page can be provided for a
commercial or military use. One such design version is where
the picofuse terminates at one end of a pin for use as a single or
multi-pin connector. Extreme accuracy in blowing time at 300% or
more of rating, makes these picofuses suitable for use in circuits
where sequential switching or redundancy may be required. The
small size of the fuse, its non-hygroscopic characteristic and
infi nitesimal weight makes it the ideal fuse for micro-electronic
circuits.
PATENTED
®
®
Average Time Current Curves
100
10
1
0.1
0.01
0.001
1/16A
0.05 0.1 1 10 100 1000
1/8A
1/4A
3/8A
1/2A
3/4A
1A
1 1/2A
2A
2 1/2A
3A
3 1/2A
4A
5A
7A
10A
12A
15A
TIME IN SECONDS
CURRENT IN AMPERES
1 1/4A
20A
25A
30A
