Aircraft Circuit Breakers - HS | electronics

3SB Series Simulator Circuit Breakers

Features 3SB2

• Low amperage / fast trip response
• High performance
• Packaged in Military Standard configuration
• Tactile feel equivalent to industry

accepted aircraft circuit breakers
• Lower total system cost

3SB4

Overview MS26574 style thermal circuit software, without the time and
breaker configuration for cost associated with rewiring.
The 3SB Series Simulator Circuit adaptability to aircraft cockpit TI’s simulator circuit breakers
Breaker has been developed by panel mounting. This fast also provide the same tactile feel
the Precision Products Group of trip/low current performance as standard MIL qualified
Texas Instruments to meet the provides the opportunity for breakers to achieve superior
growing needs of the commercial system level savings by enabling training realism.
and military simulator industry. the designer to potentially down
With more and more training now size the system power source. Klixon circuit breakers offer the
being conducted on simulators This eliminates expensive I/O flexibility of ordering replaceable
due to the high operational costs boards or other electronics while ampere rating inserts. They are
of live training, the realism and also reducing the amount of attached to the top of the push
complexity of tomorrow’s cabling required. button actuator, to match the
simulators will require a circuit current rating used in the actual
breaker that can provide the same Changes in training schemes aircraft. These inserts can be
“look and feel” of industry normally entail system rewiring rotated within the push button to
accepted circuit breakers, to reconfigure the simulator, meet your cockpit configuration
creating a superior training which becomes labor intensive needs. An optional auxiliary
environment. and costly. With the switch for remote indications,
incorporation of the 3SB device, along with a variety of
3SB electromechanical devices training changes can easily be connection alternatives, are also
provide fast trip response with achieved through system available.
low current draw at 28 VDC, and
are packaged in a standard

Characteristics 3SB

3SB2 3SB4

.750 .750

.562
3 .562
3

3 AMP RATING BREAKER IN OPEN POSITION 3 AMP RATING BREAKER IN OPEN POSITION
SHOWN SHOWN
BREAKER IN BLACK .395 BREAKER IN BLACK .395
.100 CLOSED POSITION .100 CLOSED POSITION

.216 WHITE .191 .451 .216 WHITE .191 .451
.359 BLACK .277 MAX. .359 BLACK .277 MAX.

1.115 TEXAS INSTRUMENTS
1.302 MADE IN U.S.A.

TEXAS INSTRUMENTS
MADE IN U.S.A.
1.420 1.115 1.420
MAX. 1.302 MAX.

45o .296 ACCEPTS 45o .296 ACCEPTS Ø .050 HOLE
MS 51957-25 .593 MS 51957-25 (2 PLACES)
SCREW OR AUXILIARY TERMINAL
.593 SCREW OR SOLDER OR SOLDER CONNECTION
SOLDER CONNECTION CONNECTION

Open and Reset Force ... 5 lbs. max. Dummy Circuit Breakers
Calibration @ 25oC ........ 200 mA max. current draw @
Texas Instruments has developed a derivative of our
28 VDC, 3 sec. max trip time 7274 style circuit breaker expressly for applications in
simulators, trainers and cockpit mock-ups.
Endurance ..................... 5000 mechanical cycles, no load
1000 electrical trip cycles, minimum 7274-63D: Dummy breaker. Non-functional 7274-2 style
at 28 VDC
7274-64PS: Physical sample. 7274-2 style with opera-
Vibration........................ 5 G’s maximum 50-500 Hz tional push button. Can measure continuity across
terminals.
Shock ............................. 5 G’s maximum
7274-65PS: Physical sample. 7274-11 style with opera-
Acceleration .................. 5 G’s maximum tional push button. Can measure continuity across
terminals.
Weight ........................... 30 grams maximum

Part Numbering Code

3SB 2 - 1 - X

Basic Device Series Calibration
Requirements

Ampere Rating Inserts
N = No Insert
B = Blank Insert
D = “D” Rating Insert
AMP = Amp Rating (i.e., “5”)

Physical Characteristics
2 = Standard device
4 = Auxiliary switch
21 = Standard device w/cover
22 = Standard device w/green push button
24 = Auxiliary switch w/green push button
41 = Auxiliary switch w/cover





APD Series Circuit Breakers

Arc Fault Protection Device

Features

• Small and lightweight
• Current ratings 1-25 amperes
• Detects arcs over considerable distances
• Senses small arc currents in presence of large current loads
• Insensitive to RFI/EMI and cross talk signals
• Differentiates between normal load current and arc current
• Immune to load start up transients
• Retrofitable – fits into existing panel designs

Overview arc fault circuit breakers that will circuit breakers can operate over
be used in the commercial a temperature range of
The Arc Fault Circuit Breaker aerospace market. The first -54oC to 71oC however, care
series has been developed by generation design is based upon should be taken to understand
Texas Instruments to meet the the industry need to support the specification limits at ele-
evolving needs of the aerospace 120VAC, 400 Hz aircraft vated ambient temperatures.
industry. Traditional circuit applications.
breakers were only designed to Trip Free
detect over-current (I2t) Future design considerations for
conditions. However, many the arc fault circuit breakers The complete line of arc fault
serious electrical incidents are under development by TI com- series circuit breakers is trip
caused by low level arc fault prehend and include: free. The circuit breaker cannot
conditions resulting from be maintained closed during an
damaged or aging wire which • Arc fault trip indication overload, even when the actuator
present generation circuit • 28VDC is held closed.
breakers are not designed to • Operating temperature range
detect or protect against. High Short Circuit Capacity
expansion
TI recognizes the evolving • Single phase 30–100A The arc fault series of circuit
requirements of the aerospace • Three–phase development breakers offers unusually high
industry and the need for • Ground fault detection short circuit current interrupting
supplemental arc fault protection. • Variable voltage and capacity. Depending on the
TI developed a small, lightweight device, overloads of up to
package configuration based frequency options 3500 amps at 120VAC, 400 Hz
around proven Klixon® can be safely interrupted.
commercial and mil-spec circuit Ambient Temperature
breaker designs, integrating the Compensation Options
traditional over-current trip fea-
tures of today’s circuit breakers The arc fault series of circuit Longer push buttons
with new supplemental arc fault breakers are based on the design High vibration
detection and protection features. of our existing ambient compen- Random vibration capability
shut down for motor, fan, strobe sated circuit breakers product U.S. terminals (offset/inline)
light, or fluorescent light. family permitting system Metric mounting threads
designers to specify smaller
The two arc fault catalog pages gauge wire where the circuit
represent the first generation of breaker and wiring are exposed
to different ambient
temperatures. The arc fault

Characteristics Arc Fault

1.200 5 AMP RATING SHOWN
MAX

5

ø .395

15/32

1.030 MAX .284

1.219 TEXAS INSTRUMENTS 1.312

NEUTRAL LEAD LENGTH
& CONNECTION TBD
.704 .800 MAX

Calibration: 1-25 amps Performance:
Discrimination (resistance to nuisance trips)
TEMP MIN ULT MAX ULT TRIP TIME - SECONDS Devices manufactured by TI have demonstrated success on
oC TRIP TRIP start up, bus transfer, and shut down for motor, fan,
200% 500% 1000% strobe light, and fluorescent light.
+25 115% 138% 4-16 .4-1.6 .10-.40
-54 115% 165% Detail performance per test document 76508
+121 85% 145% 7-35 .6-3.0 .15-.70 Phase to Phase and Phase to Ground 400 Hz, 120/205VAC
2-13 .25-1.0 .06-.25
Guillotine Arc Test:
Vibration*....................... 10 G’s minimum, 50 - 500 Hz Guillotine Arc Current .......Less than 700% RC rms
Steady State Load ..............None to rated current
Mechanical Shock.......... 50 G’s Maximum Arcing Cycles ....Eight
Acceleration................... 10 G’s Arcing Time Duration .........Less than 100ms

Weight............................ 42 gm max Loose Terminal Arc Detection
Steady State Load ..............Less than 40% RC rms
Interrupt Current Tripping Time: ....................Less than 2 minutes
1-20 amps: 6000 amps at 28 VDC Vibration Source .................Eccentric motor vibratory table
25 amps: 1625 amps at 28 VDC
1-15 amps: 2500 amps at 120 VAC, 400 Hz Wet Arc Detection
20 amps: 2000 amps at 120 VAC, 400 Hz MIL-STD-2223 Method 3005, wire per MIL-W-81381/11
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

* Other vibration levels available. Contact factory for details.

Approximate Time-Current Curves – APD Circuit Breakers

1000

-54oC MAXIMUM TRIP CURVE

% Rated Current +25oC TRIP BAND

+121oC MINIMUM TRIP CURVE 165%
138%
100 115%
85%

0.01 0.1 1 10 100 1000
Trip Time in Seconds

Cross Reference

QPL approved Aircraft Circuit Breakers specifications have been or are in the process of being converted to SAE
industry standard. The specification requirements and part marking remains as per the original military slash
sheet. The only difference is the SAE industry designation for the military slash sheet.

AS Number TI Number AS Number TI Number MS Number TI Number

AS 33201 2TC2 AS 14154V 6TC63 AS 26574A 7274-4
AS 33201L 2TC27 AS 22073 7274-11 AS 26574L 7274-70
AS 33201V 2TC63 AS 22073V 7274-69 AS 24509A 7270-1
AS 14105 3TC2 AS 26574 7274-2 AS 24509B 7270-7
AS 14105L 3TC27 AS 24510A 7271-8
AS 14153 9TC2 AS 24510B 7271-3
AS 14154 6TC2
AS 14154L 6TC37

Commercial Aircraft Circuit Breaker Cross Reference

Boeing Basic Specification TI Style Airbus Basic Specification TI Style Lockheed Basic Specification TI Style

BACC18U 7274-21 NSA931303 6752-12 LS10158 2TC20, 3TC20
BACC18W 7276-13 NSA931304 6752-305 LS10159S 2TC26/3TC26
BACC18Z 2TC6 NSA931320 2TC50 6TC20, 9TC20
BACC18AA 2TC14 NSA931321 5TC50 6TC26/9TC26
BACC18AC 6TC6 NSA931322 6TC50
BACC18AD 2TC47 NSA931323 15TC50
BACC18AE 9TC6 NSA931324 2TC64
10-60806-XX 6752-304 NSA931325 6TC64
10-60806-XXXX 6752-311 E0730-005 2TC65
E0731-005 6TC65
Boeing (DPD) 7274-62 E0732-005 5TC65
7274-55 E0733-005 15TC65
5D0001 7276-115
None
None

For FAA/PMA part availability go to www.klixon.com

European Norms

EN2495
EN2592
EN2794
EN2995
EN2996
EN3661
EN3662
EN3773
EN3774

Simplified Glossary of Circuit Breaker Terms

Circuit breaker – A device Minimum ultimate trip – Current Manual reset – Method of
designed to carry a specific value rating at which a breaker will not accomplishing reclosure after
of current and automatically open trip within a certain period (usually circuit interruption has occurred.
a circuit upon overloads or 1 hour) at a specified temperature.
short circuits. Indicating, non-indicating –
Maximum ultimate trip – Current Whether or not breaker gives
Thermal circuit breaker – rating at which a breaker must trip prominent visual indication of
A circuit breaker that senses a within a certain period (usually 1 opening, such as exposing a white
current overload based on thermal hour) at a specified temperature. band around button, or moving
heating of the sensing element. Thermal derating – Tendency of a toggle to off position.
breaker to trip at lower current
Time-current curve – An approx- levels due to higher ambient Manual trip – Ability of breaker
imate graph showing the minimum temperatures, and to trip at higher to be opened manually.
and maximum time a specific levels due to lower ambient
breaker will take to trip on various temperatures. Auxiliary circuit – An integrally
degrees of overload. housed, electrically independent
Trip-free – Feature of certain switch linked mechanically to
Ambient compensation – breakers that makes it impossible to operate with the main circuit
A feature of some thermal breakers hold the breaker closed against an breaker contacts.
that limits or eliminates thermal overload.
derating due to ambient Voltage drop – The voltage
temperature. decrease across the breaker due to
internal resistance of the device.

WARRANTY Important Notice: Texas Instruments (TI)
reserves the right to make changes to or dis-
Texas Instruments warrants its circuit breakers continue any product or service identified in
against faulty workmanship or the use of this publication without notice. TI advises its
defective materials for a period of 18 months customers to obtain the latest version of the
from date of manufacture. This warranty relevant information to verify, before placing
applies only to products purchased directly orders, that the information being relied upon
from Texas Instruments or through an author- is current. TI assumes no responsibility for
ized Texas Instruments distributor. During the infringement of patents or rights of others
warranty period, any circuit breaker found by based on TI applications assistance or prod-
Texas Instruments, in its sole judgement, to be uct specifications since TI does not possess
defective, will be repaired or replaced, at the full access concerning the use or application
option of Texas Instruments. Under no circum- of customers’ products. TI also assumes no
stances does Texas Instruments responsibility responsibility for customers’ product designs.
or liability extend to incidental or consequen-
tial damages whatsoever.

The foregoing is in lieu of all warranties
express, implied or statutory, including, but not
limited to, any implied warranty of merchant-
ability and fitness for a purpose and of any
other warranty obligation on the part of
Texas Instruments.