General Purpose Fuses
Plug Fuses
125 VAC • Time-Delay • 1/4 – 30 Amperes
Edison-base Plug fuses
TOO Fuses
are dual-element time-delay Edison-base fuses designed for
motor and motor branch circuit protection; also suitable for all general purpose
circuits. Use for replacement purposes only.
General Purpose Fuses
Ampere Ratings
⁄
4 10
⁄
12
⁄
6 10
⁄
8 10
⁄
3 10
1
1
1
⁄
8
1
1
⁄
4
1
4
⁄
10
1
6
⁄
10
1
8
⁄
10
2
2
1
⁄
4
2
1
⁄
2
2
8
⁄
10
3
3
2
⁄
10
3
1
⁄
2
4
4
1
⁄
2
5
5
6
⁄
10
6
6
1
⁄
4
7
8
9
10
12
14
15
20
25
30
TLO Fuses
are medium time-delay Edison-base fuses designed for general
purpose branch circuit protection. See TOO and SOO fuses for motor
protection. Use for replacement purposes only.
Ampere Ratings
15
20
25
30
Littelfuse Plug fuses provide overcurrent protection to general purpose
circuits and small motor loads. Edison-base Plug fuses (TOO and TLO
series) feature metal threads similar to incandescent lamp bases. Type S
Plug fuses (SOO and SLO series) utilize a nonmetallic threaded base and
must be used with Type S adapters (SAO series). The National Electrical
Code permits Edison-base Plug fuses to be used for replacement
purposes only. Type S fuses and adapters prevent shunting open fuses
and over-fusing.
SAO
Adapter Rating
SAO 1
SAO 1
1
⁄
4
SAO 1
6
⁄
10
SAO 2
SAO 2
1
⁄
2
SAO 3
2
⁄
10
SAO 4
SAO 5
SAO 6
1
⁄
4
SAO 8
SAO 15
SAO 20
SAO 30
Accepts
Fuse Ratings:
3 10
⁄ –1
1
1
⁄
8
, 1
1
⁄
4
1
4
⁄
10
, 1
6
⁄
10
1
8
⁄
10
, 2
2
1
⁄
4
, 2
1
⁄
2
2
8
⁄
10
, 3
2
⁄
10
3
1
⁄
2
, 4
4
1
⁄
2
, 5
3
1
⁄
2
, 6
1
⁄
4
7, 8
7, 8, 9 10, 12, 14, 15
20 only
20, 25, 30
Other SOO Fuse
Ratings Which Fit
—
3 10
⁄ –1
3 10
⁄ – 1
1
⁄
4
—
1
8
⁄
10
, 2
1
8
⁄
10
– 2
1
⁄
2
—
3
1
⁄
2
, 4
3
1
⁄
2
– 5
—
7, 8, 9, 10
—
—
Type S Plug fuses
SOO Fuses
are dual-element time-delay Type S fuses designed for motor and
motor branch circuit protection; also suitable for all general purpose circuits.
Ampere Ratings
⁄
3 10
⁄
4 10
⁄
12
⁄
6 10
⁄
8 10
⁄
14
1
1
1
⁄
8
1
1
⁄
4
1
4
⁄
10
1
6
⁄
10
1
8
⁄
10
2
2
1
⁄
4
2
1
⁄
2
2
8
⁄
10
3
3
2
⁄
10
3
1
⁄
2
4
4
1
⁄
2
5
5
6
⁄
10
6
6
1
⁄
4
7
8
9
10
12
14
15
20
25
30
SLO Fuses
are medium time-delay Type S fuses for general purpose branch
circuit protection.
Ampere Ratings
15
20
25
30
Specifications
Voltage Rating:
Interrupting Rating:
Approvals:
125 VAC
10,000 amperes rms symmetrical
UL Listed Plug Fuses, Standard UL 248-11
Note: See NEC Article 240-V for additional information on Plug fuse applications.
48
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•
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™
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