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Klixon 2TC Series
 
 
Klixon 2TC49 Series
 
 
Aircraft Circuit Breakers
 
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Fax: 1-508-236-1598
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Qualifications /\ Top
AS58091



Voltage Drop /\ Top
Amp Rating
Max. Voltage Drop*
0.70
3
0.55
5
0.35
0.30
10
0.28
* Maximum voltage drop at nominal rated current.

Site Updated October 16, 2016

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

Klixon® 2TC49 series
2½–10 amp, single–phase, dual safety, ambient compensated



Features and Overview Performance Characteristics
Amps and Voltage Qualifications
Calibration Chart Spec Sheet PDFs
Drawings and Dimensions Trip Curve
Link Separation  
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Features and Overview /\ Top

Extension of the Klixon 2TC series
Redundant protection in hard fault conditions (more info below)
Separable link feature provides dual safety feature
Case color distinguishes 2TC49 from standard 2TC series
Current ratings (2½ to 10 amps)
Uses less space and weighs less than other circuit breaker packages
AS58091 qualified
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Klixon
Aircraft Circuit Breakers

The Klixon 2TC49 dual safety circuit breaker represents a refinement in electrical control and circuit protection. The 2TC dual safety circuit breaker incorporates a fusible element in a standard 2TC (MS 3320) package size to provide redundant protection in hard fault conditions.

"Hard Fault" Tripping
The 2TC dual safety circuit breaker operates identically to a standard circuit breaker under all normal conditions, including short circuit. In the event of circumstances which disable the internal circuit breaker mechanisms such that the device is able to carry current but unable to clear an overload via its normal means, the dual safety element acts as a built in fuse to provide redundant circuit protection.

The key part in the dual safety design is a two part current carrying element joined by a special alloy. The geometry and material of the element determine its heating properties. The element’s heating properties are slower than the bimetal sensor but faster than the smoke curve of the wire the rating is designed to protect. In the case where the standard mechanism is disabled or cannot operate normally, the separable element "fuses" open, interrupting current.

The benefits of the dual safety design result in calibrated over–current protection (based on the fuse times) and specified post fuse dielectric properties for system and human protection.


Performance Characteristics /\ Top
Vibration
10G minimum, 50–500 Hz
Mechanical Shock
50G
Acceleration
10G
Weight
25 gram maximum
Interrupt Current
2½–10 amps: 6,000 amps at 28 VDC
2½ amps: 2,800 amps at 120 VAC, 400 Hz
3–10 amps: 2,500 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
Post–Short Circuit Dielectric
1125 VAC Min (1MA)
Post–Link Separation Dielectric
900 VAC (1MA)


Calibration Chart 2TC49 /\ Top
Temp.
Minimum Ultimate Trip
Maximum Ultimate Trip
Trip Time in seconds
200%
500%
1000%
25
115%
138%
5–20
0.5–2.00
0.12–0.53
-54
115%
165%
7–40
0.60–3.00
0.16–0.80
121
90%
138%
3–13
0.33–1.10
0.07–0.30
The most typical device is 2½–10 amps. For others, please contact us.


Link Separation Characteristics* /\ Top
Percentage Overload of Rated Current (Time in Seconds)
Amp 400% 500% 600% 700% 800% 900% 1000%
- - - - - - 34.0 20.0 13.0 9.0 6.0
3 - - - - - - 34.0 20.0 13.0 9.0 6.0
5 - - - 95.0 36.0 18.0 10.0 6.0 3.5
69.0 28.0 14.0 8.0 4.0 3.5 2.0
10 60.0 35.0 20.0 12.0 7.0 4.0 2.5
* Maximum circuit breaker link separation times for locked contact condition as a function of overload.


Trip Curve /\ Top

Approximate Time-Current Curves


Drawings and Dimensions 2TC49 depicted /\ Top
2TC49 Diagram


Spec Sheets For Our Most Popular Devices /\ Top
Specification sheets contain detailed drawings, amp ratings, characteristics, and more...
2TC49
Spec Sheet
2TC49
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