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Klixon 7274 Series
 
 
Aircraft Circuit Breakers
 
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klixon@sensata.com
Phone: 1-508-236-3287
Fax: 1-508-236-1598
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Part numbers
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Voltage Drop /\ Top
Amp Rating
Max. Voltage Drop*
½
2.00
¾
1.45
1
1.10
0.75
2
0.70
0.50
3
0.33
4
0.30
5
0.25
0.20
10
0.15
15
0.15
20
0.15
* Maximum voltage drop at nominal rated current.

Site Updated September 19, 2017

* * * Sensata > Products > Klixon Brand > Circuit Breakers > Aircraft >

Klixon® 7277 series
½ to 20 amp, single–phase, non–compensated, general application



Features and Overview Performance Characteristics
Amps and Voltage Trip Curve
Calibration Chart Spec Sheet PDFs
Drawings and Dimensions Typical Use
Part Numbering  
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Features and Overview /\ Top

Miniature size
Light weight
Trip–free design
Current rating: 0.5 to 20 amps
High vibration resistance
Options include: dust boot (part #14500-1 fits 15/32 bushing, part #14500-5 fits 7/16 bushing), auxiliary switch, terminal hardware, longer push button
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Klixon
7274

Klixon 7277 series is designed for applications that do not require the tighter performance characteristics and approvals of our military circuit breakers. Originally developed as an alternative to slow blow fuses, the trip–free 7277 is used extensively as primary electrical circuit protection on general aviation aircraft.

The military grade version of this circuit breaker is the Klixon 7274-2 series. The 7277 and 7274-2 series circuit breakers are physically and electrically identical, with the exception that the 7277 has wider calibration limits.



Performance Characteristics /\ Top
Vibration
10G minimum, 50–500 Hz (other vibration levels available)
Mechanical Shock
35G
Acceleration
10G
Weight
28 grams maximum
Interrupt Current
0.50–5 amps: unlimited at 28 VDC
7.50–15 amps: 2,000 amps at 28 VDC
0.50–1.50 amps: unlimited at 120 VAC, 400 Hz
2–5 amps: 800 amps at 120 VAC, 400 Hz
7.50–20 amps: 500 amps at 120 VAC, 400 Hz
Endurance
2,500 cycles: 120 VAC, 400 Hz inductive
5,000 cycles: 120 VAC, 400 Hz resistive
2,500 cycles: 30 VDC inductive
5,000 cycles: 30 VDC resistive
10,000 cycles: Mechanical, no load


Calibration Chart For a Standard Device /\ Top
Temp.
Minimum Ultimate Trip
Maximum Ultimate Trip
Trip Time in seconds
200%
500%
1000%
25°C
110%
150%
2-35
0.15-1.7
0.028-0.55
The most typical device is 1–20 amps. For others, please contact us.


Typical Use /\ Top

Computers
Construction
Data processing and telecommunications equipment
Flight simulators
General aviation aircraft
Materials handling
Other industrial electronic equipment
Trainers and simulators, where all breakers are operated on low ampere control current (see Klixon 3SB simulator series). Different amp rating inserts (amp ratings on top of push button) can be ordered separately. Use Sensata part number 27515.)


Trip Curve /\ Top

Approximate Time-Current Curves


Drawings and Dimensions For Reference Only /\ Top
7277 Diagram


Part Numbering /\ Top
7277-X-Y
7277
=
Basic part number
X
=
Style (1 for auxiliary switch, 2 for standard, 5 for standard with longer push button, and 6 for auxiliary switch with longer push button)
Y
=
Amp rating (0.50, 0.75, 1, 1.50, 2, 2.50, 3, 4, 5, 7.50, 10, 15, or 20 amps)
Unsure about the number? Don’t risk ordering the wrong part. Please contact us.


Spec Sheets For Our Most Popular Devices /\ Top
Specification sheets contain detailed drawings, amp ratings, characteristics, and more...
7277X
Device Type
Spec Sheet
7277-1
- - -
7277-2
- - -
For others, please contact us.
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