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SR35 Quick-Start Guide
Stellar® SR35 Series Soft Starter Quick Start Guide – 1st Ed – 07/09/2020
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HorT
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IrCuIT
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Short Circuit Protection – SR35 Frame Size 1
Type designation (SR35-)
017
022
027
034
041
052
065-6
Rated operational
current
I
e
A
17
22
29
35
41
55
66
Rated conditional
short circuit
current
I
q
kA
5
5
5
5
5
5
10
Class J time-delay
fuse #1
Maximum
rating Z
1
A
30
40
50
60
70
100
125
UL Listed inverse-
time delay circuit
breaker #1
Maximum
rating Z
2
A
60
60
60
60
60
150
150
Semiconductor
fuse (class aR)
#2
Type
Mersen 6,9 URD 30__
Bussmann 170M30__
Bussmann 170M31__
Bussmann 170M32__
SIBA 20 61__
Mersen 6,9 URD 31__
Bussmann 170M40__
Bussmann 170M41__
Bussmann 170M42__
SIBA 20 61__
Rating
A
160
160
200
200
250
250
250
Short Circuit Protection – SR35 Frame Sizes 2 & 3
Type designation (SR35-)
077
100
125
156
192
242
302
361
Rated operational
current
I
e
A
80
106
132
160
195
242
302
361
Rated conditional
short circuit
current
I
q
kA
10
10
10
10
10
18
18
18
Class J time-delay
fuse #1
Maximum
rating Z
1
A
150
200
250
300
400
450
600
600
UL Listed inverse-
time delay circuit
breaker #1
Maximum
rating Z
2
A
250
300
350
450
500
700
800
800
Semiconductor
fuse (class aR)
#2
Type
Mersen 6,9 URD 31__
Bussmann 170M40__
Bussmann 170M41__
Bussmann 170M42__
SIBA 20 61__
Mersen 6,9 URD 33__
Bussmann 170M60__
Bussmann 170M61__
Bussmann 170M62__
SIBA 20 63__
Rating
A
400
400
550
550
550
800
900
1000
# 1. Suitable For Use On A Circuit Capable Of Delivering Not More Than ___I
q
___ rms Symmetrical
Amperes, 600Volts Maximum, When Protected by Class J time delay Fuses with a Maximum Rating
of ___Z
1
___ or by a Circuit Breaker with a Maximum Rating of ___Z
2
___.
# 2. Correctly selected semiconductor fuses can provide additional protection against damage to the
SR35 unit (this is sometimes referred to as type 2 co-ordination). These semiconductor fuses are
recommended to provide this increased protection.
