User Guide

Miniature
circuit breakers
15.24 Low Voltage Products & Systems
1SXU000023C0202 ABB Inc. • 888-385-1221 • www.abb-control.com
15
Z
No. of
poles
Rated
current
Catalog number
No. of
poles
Rated
current
Catalog number
1
0.5 S281UC-Z0.5
3
0.5 S283UC-Z0.5
1 S281UC-Z1 1 S283UC-Z1
1.6 S281UC-Z1.6 1.6 S283UC-Z1.6
2 S281UC-Z2 2 S283UC-Z2
3 S281UC-Z3 3 S283UC-Z3
4 S281UC-Z4 4 S283UC-Z4
6 S281UC-Z6 6 S283UC-Z6
8 S281UC-Z8 8 S283UC-Z8
10 S281UC-Z10 10 S283UC-Z10
16 S281UC-Z16 16 S283UC-Z16
20 S281UC-Z20 20 S283UC-Z20
25 S281UC-Z25 25 S283UC-Z25
32 S281UC-Z32 32 S283UC-Z32
40 S281UC-Z40 40 S283UC-Z40
50 S281UC-Z50 50 S283UC-Z50
63 S281UC-Z63 63 S283UC-Z63
2
0.5 S282UC-Z0.5
1 S282UC-Z1
1.6 S282UC-Z1.6
2 S282UC-Z2
3 S282UC-Z3
4 S282UC-Z4
6 S282UC-Z6
8 S282UC-Z8
10 S282UC-Z10
16 S282UC-Z16
20 S282UC-Z20
25 S282UC-Z25
32 S282UC-Z32
40 S282UC-Z40
50 S282UC-Z50
63 S282UC-Z63
S281UC-Z
S282UC-Z
S283UC-Z
S280UC-Z, 500 VDC
Supplemental protectors
UL 1077, CSA 22.2
S201DC S282UC
500 VDC
Two Pole
LOAD
3+
4-
Tripping characteristic Z
UL 1077
500 VDC
10 kA
Resistive loads
• Z Curve
• Designed to provide maximum
protection with a very low short
circuit trip setting
• Example: semiconductors
Accessories
See page 15.26
Technical data
See page 15.76 - 15.82
Direct current applications
The S280UC differs from standard miniature
circuit breakers in that the UC versions in-
clude a permanent magnet which aids in the
extinguishing of the arc during medium and
high level faults. It is necessary to observe
the correct polarity and current direction
when connecting the UC breakers. Two ex-
amples of correct connection are shown.
Termination points are marked on all UC
type MCBs, points one (1) and four (4) are
negative and points two (2) and three (3) are
positive.
Note: This breaker for DC use only
Accessories & technical data
Accessories – See page 15.26
Technical data – See page 15.76 - 15.82