Type 4120

Type 4120


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.

Technical Data

Voltage rating
  • AC 115 V (400 Hz)
  • DC 28 V
Current ratings from 1 A up to 25 A  (0.5 A upon request)
Number of poles single pole
Mounting method threadneck
Terminal design screw terminals
Actuation manual release
push button
Auxiliary contacts with auxiliary contacts
without auxiliary contacts
Water splash protection with water splash protection
without water splash protection
Illumination without illumination
Typical life 20,000 operations mechanical or

5,000 operations at 1 x IN

Interrupting capacity Icn AC 115 V (400 Hz):

1…4 A: 1,000 A

5…25 A: 2,000 A

DC 28V:

1…25 A: 6,000 A

Certificates EN 2495, EN 3773, prEN 2995, MS 3320, QPL, VG 95345 T06, BWB, UL 1077


Order number Description
X20080103 splash cover black with O-ring
X20080108 splash cover transparent with O-ring
X20080301 actuator extension
Y30700401-05 identification collar
Y30700501 lock out ring


  • Aerospace
  • Automobiles
  • Commercial Vehicles
  • Household, Hobby & Garden Equipment
  • Minus DC 48 V
  • Telecom & Datacom
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