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The safety-related characteristics only apply when the relays
are switched at least once per year.
3
Function chart
SNE 4,012K
B1/A2 control input
LED relay group K1
Y1/Y2 signalling current path
13/14, 23/24 enabling current
4
Terminal diagram
SNE 4,012K
5
Contact load derating
The total current I
2
applies to the two enabling current
paths of a relay group. See terminal diagram.
2
Example SNE4012K ( I
= 72 A
Permanent current via contact 13/14: 6 A
Permanent current via contact 23/24: 5 A
Total current I
2
Relay group K1 = (6 A)
Component can be used within the entire temperature range,
as the total current I
is 72 A
2
Example SNE4024K: (Derating curve, see right)
Permanent current via contact 13/14, 23/24, 33/34: 2 A
Permanent current via contact 43/44: 1 A
Total current I
2
Relay group K1 = (2 A)
Total current I
2
Relay group K2 = (2 A)
Component can be used within the entire temperature range,
as the total current I
for each relay group is 8 A
2
6
Relay service life / load limit curve
Relay service life
Switching cycles
Doc. # BA000860 – 10/2012 (Rev. B)
SNE 4024K
B1,B2/A2 control input
LED relay group K1, LED relay group K2
Y1/Y2, Y3/Y4 signalling current path
13/14, 23/24, 33/34, 43/44 enabling current paths
t
= response time / t
= release time / t
A
R
2
, no derating):
2
2
+ (5 A)
= 61 A
2
.
2
2
2
+ (2 A)
= 8 A
2
2
2
+ (1 A)
= 5 A
2
.
SNE 4012K / 4024K
The safety functions have not been checked by UL. The
certification process has been carried out in accordance with
the requirements for general applications as stipulated by
UL508.
t
= restart time
W
SNE 4024K
Derating curve
A derating is only necessary for the SNE 4024K when
both relay groups are activated simultaneously.
2
Derating determined at U
Load limit curve, ohmic load
Switching current I [A] Safe deactivation, no standing
t
A
R
t
W
Ambient operating temperature, °C
= 30V
B
arc, max. 1 switching cycle/s
EN 5
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