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Klixon 3TC Series
 
 
Aircraft Circuit Breakers
 
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Voltage Drop /\ Top
Amp Rating
Max. Voltage Drop*
15
0.25
20
0.25
25
0.25
30
0.25
35
0.25
* Maximum voltage drop at nominal rated current.

Site Updated September 19, 2017

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

Klixon® 3TC series
15–35 amp, single–phase, miniature ambient compensated



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

Miniature size
Light weight
Trip–free design
Options include: longer push button, high vibration, random vibration, metric mounting thread, metric terminal thread, dust boot (part #14500-1 fits 15/32 bushing, part #14500-5 fits 7/16 bushing), terminal hardware
AS58091 qualified
Current rating: 15 to 35 amps
Coordinated ratings
High vibration resistance (option)
High interrupting capacity
Typical use: Where ambient temperature exceeds the 160°F (71°C) maximum of non–ambient compensated thermal circuit breakers
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Klixon
Aircraft Circuit Breakers

Klixon single–phase TC devices are the smallest, lightest, high performance aircraft circuit breakers available today. They represent the state-of-the-art protection of today’s aerospace power systems. Their light weight and small size make them especially well suited for aircraft, avionics and electronic systems.

The Klixon trademark has set the standard for aerospace circuit breakers. For a small, light weight configuration, the TC series offers the endurance and reliability required by exacting military specifications, and are available in standard current ratings from 15 through 35 amperes. The 3TC is available in 15 to 35 amps.

Coordination
The 3TC single–phase and three–phase breaker ratings are coordinated so that in the event of a fault of up to 6,000 amps let–through current any rating will trip before another circuit breaker twice its rating. This results in improved overall equipment performance since only the smallest faulted circuit is interrupted, while larger circuits remain operational.

Ambient Temperature Compensation
Ambient compensated circuit breakers permit system designers to specify smaller gauge wire where the circuit breaker and wiring are exposed to different ambient temperatures. They are especially suited for application where ambient temperature exceeds the 160°F (71°C) maximum of non–ambient compensated thermal circuit breakers. The TC series may be applied where operating temperatures are as high as 250°F (121°C) with no derating of the circuit breaker. This eliminates the need for cooling air and allows substantial weight, space, and cost savings.

Trip–Free
The complete line of TC series circuit breakers is trip–free. The circuit breaker cannot be maintained closed during an overload even with the actuator button held closed.

High Short Circuit Capacity
For its miniature size, the 3TC series offers unusually high current interrupting capacity. Overloads up to 6,000 amps at 28 VDC or 2,000–3,500 amps at 120 VAC, 400 Hz can be safely interrupted without affecting calibration or operating performance in the standard 3TC series.



Performance Characteristics /\ Top
Vibration
10G minimum, 50–500 Hz (other vibration levels available)
Mechanical Shock
50G
Acceleration
10G
Weight
36 gram maximum (3TC14)
Interrupt Current
15–35 amps: 6,000 amps at 28 VDC
15–35: 2,000 amps at 120 VAC, 400 Hz
25 amps: 1,800 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 3TC14 /\ Top
Temp.
Minimum Ultimate Trip
Maximum Ultimate Trip
Trip Time in seconds
200%
500%
1000%
25°C
115%
138%
4–20
0.40–1.70
0.10–0.40
-54°C
115%
165%
6–35
0.55–3.00
0.15–0.70
121°C
85%
145%
2–15
0.25–1.00
0.06–0.25


Trip Curve /\ Top

Approximate Time-Current Curves


Drawings and Dimensions /\ Top
Klixon 3TC14 is shown here:
3TC14 Diagram


Part Numbering /\ Top
3TCX-Y
Where 3TCX is the basic part number and –Y is the amp rating. For more detailed information, please see spec sheets below.


Spec Sheets /\ Top
Specification sheets contain detailed drawings, amp ratings, characteristics, and more...
3TCX
Device Type
Spec Sheet
3TC2
MS14105
3TC14
- - -
3TC27
MS14105(L)
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