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| Type | 3RV1 |
| Breaker Type | Motor Protection Circuit Breakers |
| Rated current | 1.25 |
| Number of Poles | 1 pole |
| Setting range for thermal overload releases | 0.9...1.25 A |
| Instantaneous overcurrent releases | 26 A |
| Short-circuit breaking capacity | 100 kA |
| Weight approx. | 0.354 kg |
Circuit breaker size S0 For transformer protection A-release
0.9...1.25 A Short-circuit release 26 A Screw terminal Standard
switching capacity !!! Phased-out product !!! Successor is SIRIUS
3RV2 Preferred successor type is >>3RV2411-0KA10<<
product brand name SIRIUS
product designation circuit breaker
design of the product for transformer protection
General technical data
product extension
auxiliary switch Yes
power loss W for rated value of the current
at AC in hot operating state 7.25 W
at AC in hot operating state per pole 2.4 W
surge voltage resistance rated value 6 000 V
protection class IP
on the front IP20
shock resistance 25g / 11 ms
mechanical service life (switching cycles)
of the main contacts typical 100 000
continuous current rated value 1.25 A
Ambient conditions
installation altitude at height above sea level
maximum
2 000 m
ambient temperature
during operation -20 ... +60 degrees centigrade
during storage -50 ... +80 degrees centigrade
during transport -50 ... +80 degrees centigrade
Main circuit
number of poles for main current circuit 3
adjustable pick-up value current of the currentdependent
overload release
0.9 ... 1.25 A
operating voltage
rated value 690 V
at AC-3 rated value maximum 690 V
operating current
at AC-3
at 400 V rated value 1.25 A
operating frequency
at AC-3 maximum 15 1/h
Auxiliary circuit
number of CO contacts
for auxiliary contacts 0
Protective and monitoring functions
product function
ground fault detection No
phase failure detection Yes
trip class CLASS 10
maximum short-circuit current breaking capacity (Icu)
at AC at 240 V rated value 100 kA
at AC at 400 V rated value 100 kA
at AC at 500 V rated value 100 kA
at AC at 690 V rated value 100 kA
Short-circuit protection
design of the overcurrent release and short-circuit
release
thermomagnetic
Installation/ mounting/ dimensions
mounting position any
mounting type screw and snap-on mounting onto 35 mm standard mounting rail
according to DIN EN 50022
height 97 mm
width 45 mm
depth 96 mm
required spacing
with side-by-side mounting
backwards 0 mm
at the side 0 mm
Connections/ Terminals
product function
removable terminal for auxiliary and control
circuit
No
type of electrical connection
for main current circuit screw-type terminals
for auxiliary and control circuit screw-type terminals
arrangement of electrical connectors for main current
circuit
front side
type of connectable conductor cross-sections
for main contacts
solid 2x (1 ... 2.5 mm?), 2x (2.5 ... 6 mm?)
stranded 2x (1 ... 2.5 mm?), 2x (2.5 ... 6 mm?)
finely stranded with core end processing 2x (1 ... 2.5 mm?), 2x (2.5 ... 6 mm?)
at AWG conductors for main contacts 2x (14 ... 10)
Ask questions
(0/1,200)
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Reviews
- N
Neil Dick
Jul 17, 2025
Siemens Circuit Breaker 3RV1421-0KA10Extremely satisfied with the product and service.HelpfulUnhelpful - R
Robert Browand
Jun 21, 2025
Siemens Circuit Breaker 3RV1421-0KA10My order was delivered in 5 days, great job.HelpfulUnhelpful - J
Joel Goodell
Oct 04, 2024
Siemens Circuit Breaker 3RV1421-0KA10Impressive service - got my package in a snap.HelpfulUnhelpful - S
SD Williams
Apr 13, 2024
Siemens Circuit Breaker 3RV1421-0KA10very happy with the product and the speed of the deliveryHelpfulUnhelpful - A
Anonymous user
Nov 25, 2022
Siemens Circuit Breaker 3RV1421-0KA10All was ok! No problems whatsoever.HelpfulUnhelpful
Siemens Circuit Breaker 3RV1421-0KA10
✔ In Stock (Can ship in 5-7 days)

Online Support 24/7
12 Months Warranty for New Products
30 Days Money Back Guarantee
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