General Purpose Fuses
Plug Fuses
125 VAC Time-Delay 1/4 – 30 Amperes
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•
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.
Ampere Ratings
3
1
1
10
10
2
8
4
4
2
⁄
⁄
⁄
⁄
⁄
1 ⁄
2 ⁄
4
4 ⁄
7
8
9
10
12
14
15
20
25
30
4
1
1
1
2
1 ⁄
2 ⁄
1
4
8
10
10
10
10
1 ⁄
2 ⁄
3
5
6
8
6
6
10
10
1 ⁄
5 ⁄
8
2
10
10
2
1 ⁄
3 ⁄
6
1
1
4
1
2
3 ⁄
6 ⁄
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.
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
SAO
Adapter Rating
Accepts
Fuse Ratings:
Other SOO Fuse
Ratings Which Fit
1
1
1
4
2
2
4
⁄
1
2
3 ⁄
6 ⁄
14
15
20
25
30
3
3
1
1
10
SAO 1
⁄
– 1
4
—
10
10
8
4
4
2
⁄
⁄
⁄
1 ⁄
2 ⁄
4
7
8
9
10
12
1
1
1
3
4
1
1
1
4
8
10
SAO 1 ⁄
1 ⁄ , 1 ⁄
⁄
– 1
1 ⁄
2 ⁄
4 ⁄
6
4
6
3
1
1
4
8
10
10
10
10
4
SAO 1 ⁄
1 ⁄ , 1 ⁄
⁄
– 1 ⁄
2
10
10
10
10
1 ⁄
2 ⁄
3
5
8
6
8
6
6
10
10
10
10
SAO 2
1 ⁄ , 2
—
⁄
⁄
1 ⁄
5 ⁄
6
1
1
1
8
8
2
2
4
2
10
10
SAO 2 ⁄
2 ⁄ , 2 ⁄
1 ⁄ , 2
1 ⁄
3 ⁄
2
8
2
8
1
10
10
10
10
2
SAO 3 ⁄
2 ⁄ , 3 ⁄
1 ⁄ – 2 ⁄
1
2
SAO 4
3 ⁄ , 4
4 ⁄ , 5
3 ⁄ , 6 ⁄
7, 8
—
1
1
2
2
SAO 5
3 ⁄ , 4
SLO Fuses are medium time-delay Type S fuses for general purpose branch
circuit protection.
1
1
1
1
4
2
4
2
SAO 6 ⁄
3 ⁄ – 5
SAO 8
SAO 15
SAO 20
SAO 30
—
7, 8, 9, 10
—
Ampere Ratings
7, 8, 9 10, 12, 14, 15
20 only
15
20
25
30
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.
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© 2005 Littelfuse POWR-GARD™ Products Catalog
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