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 Klixon - Texas Instruments 

Aircraft Circuit Breakers

Single Phase, Ambient Compensated

2TC

Section #1- Klixon 2TC2 
 P/N MS Number Amp
2TC2-1 MS3320-1 1
2TC2-2 MS3320-2 2
2TC2-2.5 MS3320-2 1/2 2.5
2TC2-3 MS3320-3 3
2TC2-4 MS3320-4 4
2TC2-5 MS3320-5 5
2TC2-7.5 MS3320-7 1/2 7.5
2TC2-10 MS3320-10 10
2TC2-15 MS3320-15 15
2TC2-20 MS3320-20 20
2TC2-25 MS3320-25 25

Features
Miniature Size -  Light Weight - Trip Free - MIL-C-5809 Qualified - Current Ratings (1 to 25 Amps) -  High Vibration Resistance -
High Interrupting Capacity

Overview
Klixon® single-phase TC devices are the smallest, lightest, high performance aircraft circuit breakers available today. They represent the "state-of-the-art" for protection of today's aerospace power systems. Their lightweight 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, lightweight configuration, the TC series offers the endurance and reliability required by exacting military specifications, and are available in standard current ratings from 1 through 35 amperes.

Coordination
The single phase 2TC and 3TC, and three phase 6TC and 9TC breaker ratings are coordinated so any rating will trip before another circuit breaker twice it's rating in the event of a fault of up to 600 amps let through current. This results in improved overall equipment performance, since only the smallest faulted circuit is interrupted, while larger circuits remain operational.

Ambient Temperature Compensation
The 2TC serves as an ambient compensated circuit breaker permits 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.

Options
Longer Pushbuttons - Metric Mounting Thread - Dust Boot ¹ - Auxiliary Switch - Terminal Barriers - Terminal Hardware
            ¹ Part number 14500-1 fits 15/32 bushing
              Part number 14500-5 fits 7/16 bushing
 

Qualifications
MS3320 2TC2
MS3320L 2TC27
MS3320V 2TC63
European Standards
All US Aircraft OEM's
Most European Aircraft OEMs
SAE Industry Standards

Calibration: 1-25 Amps (Typical*)
Temp
°C
Min. Ult.
Trip
Max. Ult.
Trip
Trip Time - Seconds
200% 500% 1000%
+25 115% 138% 4 - 16 .4 - 4.6 .10 - .40
-54 115% 165% 7 - 35 .6 - 3.0 .15 - .70
*The above calibration chart is representative of a standard commercial device. TI offers specific variants with similar performance dependant on military or customer specifications.
 

Performance
Vibration*................. 10 G minimum, 50-500 Hz
Mechanical Shock..... 50 G
Acceleration.............. 10 G
Weight...................... 24 grams
*Other vibration levels available

 

Interrupting Capacity
   1-20 amps    6000 amps at 28 VDC
   25 amps 1625 amps at 28 VDC
   3-15 amps 2500 amps at 120 VAC, 400 Hz
   20 amps 2000 amps at 120 VAC, 400 Hz
   25 amps 1800 amps at 120 VAC, 400 Hz
Endurance
   2500 cycles 120 VAC. 400 Hz, Inductive
   5000 cycles 120 VAC. 400 Hz, Resistive
   2500 cycles 30 VDC, Inductive
   5000 cycles 30 VDC, Resistive
   10,000 cycles    Mechanical, No Load

 
Amp Rating     Voltage
Drop (max)*
1 1.10
2 0.70
0.50
3 0.40
4 0.45
5 0.35
0.30
10 0.28
15 0.25
20 0.25
25 0.20
*Maximum voltage drop at nominal rated current.

 

 

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