8952130000 Weidmuller, 8952130000 Datasheet - Page 7

• Manufacturer Part Number: 8952130000
• Description: SSR, DIN RAIL, 520VAC, 30VDC/30VAC, 20A
• Manufacturer: Weidmuller

Specifications of 8952130000

• Control Voltage Type: DC
• Control Voltage Range: 8VDC To 30VDC / 10VAC To 30VAC
• Operating Voltage Range: 24VAC To 520VAC
• Peak Surge Current: 250A
• Load Current: 20A
• Switching Mode: Zero Cross
• Rohs Compliant: No

Principal characteristics of relay contacts
Although every relay contact has its own characteristics, the
performance curves are very similar in terms of shape, but not
in terms of the actual values. The examples below show curves
for
• contact lifetime (number of make-break operations plotted
• DC limit curve (direct current plotted against direct voltage)
• reduction factor for inductive load (reduction factor plotted
Contact lifetime for ohmic load
DC limit curve for ohmic load
Reduction factor for inductive load cos
Eff. make-break op. = make-break operations for (cos
against make-break capacity)
against cos )
< 1
= 1) x
Derating curve
The transition resistance of the relay contacts is a key factor
contributing to temperature increase inside the relay modules.
This relationship is illustrated by a derating curve, defined as the
function of the permissible current plotted against the ambient
temperature.
The permissible current (curve a) is determined for the following
operating conditions:
– Continuous operation
– Rated input voltage + 10 percent
– Several relay modules working under load, mounted horizon-
If the modules are mounted with a spacing > 20 mm, this results
in a higher current load (curve b). Curve b also shows the maxi-
mum values for switching or short-time operation when mounted
horizontally.
tally in rows on mounting rail, without any spacing
Relays – overview
C.7
C