7277 Series Circuit Breakers
Low Amperage, General Application
Features
The 7277 series is designed for applications that do not
require the tighter performance characteristics and
approvals of our military circuit breakers.
•
Small size
•
Light weight
•
Inexpensive
•
Auxiliary switch
•
Longer push buttons
Overview
The 7277 series circuit breaker is
physically and electrically identical
to the 7274-2 style circuit breaker,
with the exception that the 7277
series has wider calibration limits.
Originally developed as an alterna-
tive to slow blow fuses, the trip
free 7277 is used extensively as
primary electrical circuit protec-
tion on general aviation aircraft.
Code System
7277
Basic type
Ampere rating
(i.e., 5 = 5 amps,
7
1
⁄
2
= 7
1
⁄
2
amps)
1000
% Rated Current
7277-2
7277-1
The wider calibration limits of the
7277 has also resulted in
applications including protection
for data processing and
telecommunications equipment,
computers, ight simulators,
construction, material handling
and other industrial,electronic
equipment.
For use on trainer / simulator
applications where all breakers
are operated on low ampere
control current, di erent ampere
rating inserts (amp ratings on top
of push button) can be ordered.
Use TI part number 27515.
(Refer to 7274-2 and 7274-4
dimensions on previous page.)
Calibration: 1/2–20 amps*
–
2
–
5
Temp
oC
+25
Min ULT
Trip
110%
Max ULT
Trip
150%
Trip Time – Seconds
200%
1000%
500%
2-35
.028-.55
.15-1.70
* Performance characteristics and dimensions are equivalent to 7274 which are
found on page 19.
Derivative
Approximate Time-Current Curves 7277 Circuit Breakers
7277 –1: Aux. switch version
Ordering Information
Sensata
Number
7277-2-
1
⁄
2
7277-2-
3
⁄
4
7277-2-1
7277-2-1
1
⁄
2
7277-2-2
7277-2-2
1
⁄
2
7277-2-3
7277-2-4
7277-2-5
7277-2-7
1
⁄
2
7277-2-10
7277-2-15
7277-2-20
Ampere Max. Drop**
Rating
(volts)
1/2
3/4
1
1
1
⁄
2
2
2
1
⁄
2
3
4
5
7
1
⁄
2
10
15
20
2.00
1.45
1.10
0.75
0.70
0.50
0.33
0.30
0.25
0.20
0.15
0.15
0.15
100
.01
.1
1
Trip Time in Seconds
10
100
150%
115%
1000
**Max voltage drop at nominal rated current.
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