3RA2120-4BH27-0AP0

**3RA2120-4BH27-0AP0** 

**Data sheet** 

Load feeder fuseless, Direct-on-line starting 400 V AC, Size S0 13...20 A 230 V AC Spring-type terminal for 60 mm busbar systems (also fulfills type of coordination 1) Type of coordination 2, Iq = 150 kA 1 NO+1 NC (contactor) 

||Load feeder fuseless, Direct-on-line starting 400 V AC, Size S0 13...20 A 230 V AC<br>Spring-type terminal for 60 mm busbar systems (also fulfills type of coordination 1)<br>Type of coordination 2, Iq = 150 kA 1 NO+1 NC (contactor)|
|---|---|
|**product brand name**|SIRIUS|
|**product designation**|Direct(on-line)starter|
|**design of theproduct**|for 60 mm busbars|
|**product type designation**|3RA21|
|**manufacturer's article number**||
|● of the supplied contactor|3RT2027-2AP00|
|● of the supplied circuit-breakers<br>~~ee~~|3RV2021-4BA20<br>~~ee~~|
|● of the supplied busbar adapter<br>~~ee~~|8US1251-5NT11<br>~~ee~~|
|● of the supplied link module<br>~~ee~~|3RA2921-2AA00<br>~~ee~~|
|**General technical data**<br>~~ee~~||
|**size of the circuit-breaker**<br>~~ee~~|S0<br>~~ee~~|
|**size of load feeder**|S0|
|**power loss[W] for rated value of the current**||
|● at AC in hot operatingstateperpole|5.8 W|
|● without load current share typical|9.8 W|
|**type of calculation ofpower loss current-dependent**|quadratic|
|insulation voltage with degree ofpollution 3 at AC rated value|690 V|
|**surge voltage resistance rated value**|6 kV|
|**degree ofprotection NEMA rating**|other|
|**shock resistance according to IEC 60068-2-27**|6g/ 11 ms|
|mechanical service life(operatingcycles)of contactor typical|10 000 000|
|**type of coordination**|2|
|**reference code according to IEC 81346-2:2019**|Q|
|**Substance Prohibitance(day/month/year)**|10/01/2009|
|**SVHC substance name**|Lead CAS-No. 7439-92-1|
|**Net Weight**|1.432 kg|
|**Ambient conditions**<br>~~|~~||
|**ambient temperature**<br>~~|~~|~~|~~|
|● duringoperation|-20 ... +60 °C|
|● duringstorage|-50 ... +80 °C|
|● duringtransport|-50 ... +80 °C|
|**temperature compensation**|-20 ... +60 °C|
|relative humidityduringoperation|10 ... 95 %|
|**Main circuit**<br>~~|~~||
|**number ofpoles for main current circuit**<br>~~|~~|3<br>~~|~~|
|**design of the switching contact**|electromechanical|
|**adjustable current response value current of the current-**<br>**dependent overload release**|13 ... 20 A|
|**operating voltage**||
|● rated value|690 V|
|● at AC-3 rated value maximum|690 V|
|● at AC-3e rated value maximum|690 V|
|**operating frequency rated value**|50 ... 60 Hz|
|**operational current**||
|● at AC-3 at 400 V rated value|20 A|
|● at AC-3e at 400 V rated value|20 A|
|**operating power**||
|● at AC-3||
|— at 400 V rated value|7 500 W|



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|● at AC-3e||
|---|---|
|— at 400 V rated value|7 500 W|
|**Control circuit/ Control**||
|**type of voltage of the control supply voltage**|AC|
|**control supply voltage at AC**||
|● at 50 Hz rated value|230 V|
|**apparent holding power of magnet coil at AC**|9.8 VA|
|● at 50 Hz|9.8 VA|
|**inductivepower factor with the holding power of the coil**|0.25|
|● at 50 Hz|0.25|
|**Auxiliary circuit**||
|**product extension auxiliary switch**|Yes|
|**Protective and monitoring functions**||
|**trip class**|CLASS 10|
|**design of the overload release**|thermal(bimetallic)|
|response value current of instantaneous short-circuit trip unit|260 A|
|**UL/CSA ratings**||
|**full-load current(FLA) for 3-phase AC motor**||
|● at 480 V rated value|20 A|
|● at 600 V rated value|20 A|
|**yielded mechanicalperformance[hp]**||
|● for single-phase AC motor||
|— at 110/120 V rated value|1.5 hp|
|— at 230 V rated value|3 hp|
|● for 3-phase AC motor||
|— at 200/208 V rated value|7.5 hp|
|— at 220/230 V rated value|7.5 hp|
|— at 460/480 V rated value|15 hp|
|**Short-circuit protection**||
|**product function short circuitprotection**|Yes|
|**design of the short-circuit trip**|magnetic|
|**conditional short-circuit current(Iq)**||
|● at 400 V accordingto IEC 60947-4-1 rated value|150 000 A|
|**Installation/ mounting/ dimensions**||
|**mounting position**|vertical|
|**fastening method**|for snappingonto 60 mm busbar systems|
|**height**|260 mm|
|**width**|45 mm|
|**depth**|165 mm|
|**required spacing**||
|● forgroundedparts||
|— forwards|20 mm|
|— backwards|0 mm|
|— upwards|50 mm|
|— at the side|20 mm|
|— downwards|10 mm|
|● for liveparts||
|— forwards|20 mm|
|— backwards|0 mm|
|— upwards|50 mm|
|— downwards|10 mm|
|— at the side|20 mm|
|**Connections/ Terminals**||
|**type of electrical connection**||
|● for main current circuit|spring-loaded terminals|
|● for auxiliaryand control circuit|spring-loaded terminals|
|**Safety related data**||
|product function suitable for safety function|Yes|



Subject to change without notice © Copyright Siemens 

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**----- Start of picture text -----**<br>
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**last modified:** 

4/24/2026 

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