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Siemens 3RA2120-4EE27-0BB4

Load feeder fuseless, Direct-on-line starting 400 V AC

MPN: 3RA2120-4EE27-0BB4
Category: SIRIUS 3RA2 load feeders

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What is the Siemens 3RA2120-4EE27-0BB4?

Load feeder fuseless, Direct-on-line starting 400 V AC, Size S0 27.0...32.0 A 24 V DC Spring-type terminal for installation on standard mounting rail (also fulfills type of coordination 1) Type of coordination 2, Iq = 150 kA 1 NO+1 NC (contactor)

Specifications

General technical data

size of the circuit-breaker	S0
size of load feeder	S0
power loss [W] for rated value of the current – at AC in hot operating state per pole	6.7 W
power loss [W] for rated value of the current – without load current share typical	5.9 W
type of calculation of power loss current-dependent	quadratic
insulation voltage with degree of pollution 3 at AC rated value	690 V
surge voltage resistance rated value	6 kV
degree of protection NEMA rating	other
shock resistance according to IEC 60068-2-27	6 g / 11 ms
mechanical service life (operating cycles) 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
Net Weight	1.077 kg

Ambient conditions

ambient temperature – during operation	-20 ... +60 °C
ambient temperature – during storage	-50 ... +80 °C
ambient temperature – during transport	-50 ... +80 °C
temperature compensation	-20 ... +60 °C
relative humidity during operation	10 ... 95 %

Main circuit

number of poles for main current circuit	3
design of the switching contact	electromechanical
adjustable current response value current of the current-dependent overload release	27 ... 32 A
operating voltage – rated value	690 V
operating voltage – at AC-3 rated value maximum	690 V
operating voltage – 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	29 A
operational current – at AC-3e at 400 V rated value	29 A
at AC-3 – — at 400 V rated value	15 000 W
at AC-3e – — at 400 V rated value	15 000 W

Control circuit/ Control

type of voltage of the control supply voltage	DC
control supply voltage at DC rated value	24 V
holding power of magnet coil at DC	5.9 W

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	400 A

UL/CSA ratings

full-load current (FLA) for 3-phase AC motor – at 480 V rated value	27 A
full-load current (FLA) for 3-phase AC motor – at 600 V rated value	27 A
for single-phase AC motor – — at 110/120 V rated value	2 hp
for single-phase AC motor – — at 230 V rated value	5 hp
for 3-phase AC motor – — at 200/208 V rated value	10 hp
for 3-phase AC motor – — at 220/230 V rated value	10 hp
for 3-phase AC motor – — at 460/480 V rated value	20 hp

Short-circuit protection

product function short circuit protection	Yes
design of the short-circuit trip	magnetic
conditional short-circuit current (Iq) – at 400 V according to IEC 60947-4-1 rated value	150 000 A

Installation/ mounting/ dimensions

mounting position	vertical
fastening method	screw and snap-on mounting onto 35 mm DIN rail
height	243 mm
width	45 mm
depth	107 mm
for grounded parts – — forwards	20 mm
for grounded parts – — backwards	0 mm
for grounded parts – — upwards	50 mm
for grounded parts – — at the side	20 mm
for grounded parts – — downwards	10 mm
for live parts – — forwards	20 mm
for live parts – — backwards	0 mm
for live parts – — upwards	50 mm
for live parts – — downwards	10 mm
for live parts – — at the side	20 mm

Connections/ Terminals

type of electrical connection – for main current circuit	spring-loaded terminals
type of electrical connection – for auxiliary and control circuit	spring-loaded terminals

Safety related data

product function suitable for safety function	Yes
touch protection on the front according to IEC 60529	finger-safe, for vertical contact from the front

Communication/ Protocol

protocol is supported – PROFINET IO protocol	No
protocol is supported – PROFIsafe protocol	No
protocol is supported AS-Interface protocol	No

Downloads & documentation

Official documents from Siemens, downloaded directly from the manufacturer.

Data sheets & manuals

Product data sheet 3RA2120-4EE27-0BB4PDF

3RA2120-4EE27-0BB4: frequently asked questions

When can 3RA2120-4EE27-0BB4 be shipped?

3RA2120-4EE27-0BB4 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up 3RA2120-4EE27-0BB4 in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for 3RA2120-4EE27-0BB4 and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for 3RA2120-4EE27-0BB4, subject to availability and destination.