High Performance Thermal Circuit Breaker 4120-...
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1
Description
Typical applications
Ordering information
Technical data
Single pole, miniaturised thermal circuit breaker with trip-free mechanism
and push/pull on/off manual actuation (M-type TO CBE to EN 60934).
Threadneck panel mounted, temperature-compensated, with optional
auxiliary contacts. Fully approved for commercial aircraft and similar
requirements.
Various dummies are available without protective function, allowing
connection of pre-installed wiring without loads.
US patent number: US 6,490,141 B2 (4120-G4 moulded threadneck)
Extra low voltage wiring systems on all types of vehicles for land,
sea and air.
4120-...
Type No.
4120 single pole, with temperature compensation
Mounting
G threadneck panel mounting
Threadneck design
1 M12x1x6.3 (aluminium)
2 7/16-32 UNx6.3 (aluminium)
Number of poles
1 1-pole, thermally protected
Hardware for threadneck
0 without hardware
1 hex nut M12x1, corrugated washer 12/15, fitted
3 hex nut M12x1 (aluminium),
serrated lock washer 12.1/17.2, bulk shipped
4 hex nut 7/16-32UN (aluminium),
serrated lock washer 11.3/14.9, fitted
Terminal design (main terminals)
K1 screw terminals with metric thread K14 (M4)
J1 screw terminals with inch thread J14 (8-32UNC-2B)
J2 screw terminals with inch thread J17 (8-32UNC-2B)
J3 screw terminals with inch thread J25 (6-32UNC-2B)
P1 blade terminals 6.3x0.8, DIN 46244, silver-plated
Characteristic curve
M1 thermal, 1.15 - 1.4 I
N
Terminal screws
A Phillips screw M4x6, fitted
B
Phillips screw 8-32UNC-2Ax6, fitted
C Phillips screw 6-32UNC-2Ax6 (MS 51957-26)
K hex screw with Phillips head 8-32UNC-3Ax7.6, fitted
M hex screw with Phillips head 8-32UNC-
3Ax7.6, bulk shipped
Z without terminal hardware
Terminal washers
0 without lock washer
1 wave washer A4, fitted
2 lock washer 4.3, fitted
4 lock washer 3.7 (MS 35338-136)
5 lock washer 4.3/9, fitted
6 lock washer 4.3/9, bulk shipped
Auxiliary contact
S0 without auxiliary contact
S1 with auxiliary contact (connector
EN 3155-016M2018) (NC)
S5 with polarized auxiliary contact (NC)
Barrier
Z without barrier
Colour of the push button
G green to EN (e. g. 2 1/2)
N
black to EN (e. g. 2 1/2)
Current ratings
1...25 A
4120 - G 1 1 1 - K1 M1 - A 1 S0 Z N - 10 A ordering example
Voltage rating AC 115 V (300 Hz to 800 Hz); DC 28 V
Current rating range 1...25 A (0.5 A upon request)
Auxiliary circuit 1 A, DC 28 V (0.5 A upon request)
Typical life 20,000 operations mechanical, or
5,000 operations at 1 x I
N
Ambient temperature -55°C ...+125°C (-67...+257 °F)
Insulation co-ordination rated impulse pollution
(IEC 60664 and 60664A) withstand voltage degree
1.5 kV 3
Dielectric strength
(IEC 60664 and 60664A) test voltage
operating area AC 1,500 V
main to aux. circuit AC 1,500 V
Insulation resistance > 100 MΩ (DC 500 V)
Interrupting capacity I
cn
AC 115 V (400 Hz): 1...4 A 1,000 A
5...25 A 2,000 A
DC 28 V: 1...25 A 6,000 A
Degree of protection operating area IP40
(IEC 60529/DIN 40050) terminal area IP00
Vibration 10 g (57-2000 Hz), ± 0.76 mm (5-57 Hz)
(sinusoidal) to ISO 7137, EN 2350 para. 5.3.1
Vibration 1...2.5 A: 0.04 g
2
/Hz ± 1,5 dB; 7.3 g eff
3...20 A: 0.06 g
2
/Hz ± 1,5 dB; 9 g eff
to ISO 7137, EN 2350 para. 5.3.1
Acceleration 17 g, to ISO 2669, EN 2350 para. 5.3.3
Shock 50 g (11 ms), to ISO 7137,
EN 2350 para. 5.3.2
Corrosion 48 hours at 5 % salt mist
to ISO 7137, EN 2350 para. 5.4.2
Humidity 240 hours at 95 % RH,
to ISO 7137, EN 2350 para. 5.4.3
Explosion to VG 95210, sheet 10
Altitude ≤ 22,000 m above sea level
Mass approx. 20.6 g with terminal screws,
without -Si
approx. 24.6 g with terminal screws,
with -Si
Preferred types Standard current ratings (A)
1 2 3 5 7.5 10 15 20 25
4120-G214-J1M1-B2S0ZN
(MS3320)
x x x x x x x x x
4120-G111-K1M1-A1S0ZN
(EN 2495/VG93345 T06)
x x x x x x x x x
Preferred types
