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MIRA ContaCtors and overload relays
MTK-32 MTK-63 MTK-95
MTK Thermal Overload Relays
The MTK, bimetal-style differential, overload relays are designed to protect AC circuits and motors against overloads, phase failure, long starting times and prolonged stalling of the motor.
Contactor connections
Trip indicator
Stop/Test button
Reset button/Selector(manual or automatic reset)
Auxiliary contacts (1NO & 1NC)
Downstream connections
Frame size/Part number
Protection cover
Adjustment dial
Tamper protection
thermal overload relays
MTK-150 MTK-225 MTK-400 MTK-800
Environment and Auxiliary CircuitEnvironment MTK-32~800
Standards IEC/EN 60947-1, IEC/EN 60947-4-1
Certifications CE, CSA, UL
Rated operation voltage Max. 690V
Rated insulation voltage 690V
Rated frequency 50/60Hz
Degree of protection (Conforming to IEC 60-529) IP20
Ambient air temperatureStorage -67 ~ +176°F (-55 ~ +80°C)
Operation -23 ~ +104°F (-5 ~ +40°C)
Mounting position Vertical plane
Shock resistance (Conforming to IEC 68-2-7) 15gn - 11ms
Vibration resistance (Conforming to IEC 68-2-6) 6G
Insulation strength (Conforming to IEC 255-5) 6kV
Rated impulse withstand voltage (Conforming to IEC 801-5) 6kV
Auxiliary Contacts Characteristics
Composition 1NO +1NC
Rated thermal current 5A
Rated operation current C600, R300
AC15 duty (C600)
120V 1.5A
240V 0.75A
380V 0.47A
480V 0.375A
500V 0.35A
600V 0.3A
DC13 duty (R300)120V 0.22A
240V 0.1A
Connecting conductor Size 18AWG /1mm2
Connection to screw clamp terminals Type 149/167°F (65/75°C) CU-wire
ThERMAl OvERlOAd RElAys
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MIRA ContaCtors and overload relays
specifications
Frame size
Trip class
Model number
Number of poles
Rated operational voltage (Ue)
Rated insulation voltage (Ui)
Rated impulse voltage (Uimp)
Degree of protection (IEC-60 529)
Temperature compensation °F (°C)
Functions
Setting range (A)
Nominal current rating
Wire size
mm2 AWG
0.14 1 18
0.21 1 18
0.33 1 18
0.52 1 18
0.82 1 18
1.3 1 18
2.1 1 18
3.3 1 18
5 1 18
6.5 1 18
7.5 1~1.5 18~16
8.5 1~1.5 18~16
11 1.5~2.5 16~14
15 2.5 14~12
19 2.5~4 12~10
21.5 2.5~4 12~10
27 4~6 10
30 4~10 10~9
34 6~10 10~9
42 10 8
54 10 8
65 18~25 6~4
74 18~25 6~4
83 25~35 4~3
90 25~35 4~3
Contactor models
Separate mounting unit
40AF
10
MTK-32/3
3
690V
Up to 690V
6kV
IP20
23~140°F (-5~+40°C)
Trip indicating
Stop
Test
Manual/Automatic Reset
Overload adjustment range
0.1~0.16
0.16~0.25
0.25~0.4
0.4~0.63
0.63~1
1~1.6
1.6~2.5
2.5~4
4~6
5~8
6~9
7~10
9~13
12~18
16~22
18~25
22~32
-
28~40
-
-
-
-
-
-
MRC-9B, 12B, 18B, 22B, 32A, 40A
UZ-32
MTK Differential TypeThermal Overload Relays
thermal overload relays
65AF
10
MTK-63/3
3
690V
Up to 690V
6kV
IP20
23~140°F (-5~+40°C)
Trip indicating
Stop
Test
Manual/Automatic reset
Overload adjustment range
-
-
-
-
-
-
-
-
4~6
5~8
6~9
7~10
9~13
12~18
16~22
18~25
22~32
24~36
-
34~50
45~65
-
-
-
-
MRC-50LA, 65LA
UZ-63
100AF
10
MTK-95/3
3
690V
Up to 690V
6kV
IP20
23~140°F (-5~+40°C)
Trip indicating
Stop
Test
Manual/Automatic Reset
Overload adjustment range
-
-
-
-
-
-
-
-
-
-
-
-
9~13
12~18
16~22
18~25
-
24~36
28~40
34~50
45~65
54~75
63~85
70~95
80~100
MRC-75LA, 85LA, 100LA
UZ-95
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MIRA ContaCtors and overload relays
specifications
150AF
10
MTK-150/3
3
690V
Up to 690V
6kV
IP20
23~140°F (-5~+40°C)
Trip indicating
Stop
Test
Manual/Automatic Reset
Overload adjustment range
34~50
45~65
54~75
63~85
-
80~105
-
95~130
110~150
-
-
-
-
-
-
-
MRC-130LA, 150LA
UZ-150
Frame size
Trip class
Type
Number of poles
Rated operational voltage (Ue)
Rated insulation voltage (Ui)
Rated impulse voltage (Uimp)
Degree of protection (IEC 60 529)
Temperature compensation °F (°C)
Functions
Setting range (A)
Nominal current rating
Wire size
mm2 AWG
42 10 8
55 16 6
65 25 4
74 25 4
80 35 3
93 35 2
107 50 1
113 50 1
130 50 0
130 70 00
153 95 000
200 120 250
265 185 350
350 240 500
515 185 x 2 350 x 2
660 240 x 2 300 x 3
Contactor models
Separate mounting unit
MTK Differential TypeThermal Overload Relays
thermal overload relays
225AF
10
MTK-225/3
3
690V
Up to 690V
6kV
IP20
23~140°F (-5~+40°C)
Trip indicating
Stop
Test
Manual/Automatic reset
Overload adjustment range
-
-
-
-
65~100
-
85~125
-
-
100~160
120~185
160~240
-
-
-
-
MRC-185A, 225A
N/A
400AF
10
MTK-400/3
3
690V
Up to 690V
6kV
IP20
23~140°F (-5~+40°C)
Trip indicating
Stop
Test
Manual/Automatic reset
Overload adjustment range
-
-
-
-
-
-
85~125
-
-
100~160
120~185
160~240
200~330
260~400
-
-
MRC-330A, 400A
N/A
800AF
10
MTK-800/3
3
690V
Up to 690V
6kV
IP20
23~140°F (-5~+40°C)
Trip indicating
Stop
Test
Manual/Automatic reset
Overload adjustment range
-
-
-
-
-
-
-
-
-
-
-
-
200~300
260~400
400~600
520~800
MRC-630A, 800A
N/A
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MIRA ContaCtors and overload relays
Ordering Information
Thermal Overload Relays and separate Mounting Units
Frame Size Contactor Models
Relay Setting Range Overload Part #
Overload Separate Mounting Units
A
40AF
MRC-9BMRC-12BMRC-18BMRC-22BMRC-32AMRC-40AMRD-9BMRD-12BMRD-18BMRD-22BMRD-32AMRD-40A
0.1~0.16 MTK-32/3-0.16
UZ-32
0.16~0.25 MTK-32/3-0.25
0.25~0.4 MTK-32/3-0.4
0.4~0.63 MTK-32/3-0.63
0.63~1 MTK-32/3-1
1~1.6 MTK-32/-3-1.6
1.6~2.5 MTK-32/3-2.5
2.5~4 MTK-32/3-4
4~6 MTK-32/3-6
5~8 MTK-32/3-8
6~9 MTK-32/3-9
7~10 MTK-32/3-10
9~13 MTK-32/3-13
12~18 MTK-32/3-18
16~22 MTK-32/3-22
18~25 MTK-32/3-25
22~32 MTK-32/3-32
65AF
MRC-50LAMRC-65LAMRD-50LAMRD-65LA
4~6 MTK-63/3-6L
UZ-63L
5~8 MTK-63/3-8L
6~9 MTK-63/3-9L
7~10 MTK-63/3-10L
9~13 MTK-63/3-13L
12~18 MTK-63/3-18L
16~22 MTK-63/3-22L
18~25 MTK-63/3-25L
24~36 MTK-63/3-36L
28~40 MTK-63/3-40L
34~50 MTK-63/3-50L
45~65 MTK-63/3-65L
thermal overload relays
Ordering Information
Thermal Overload Relays and separate Mounting Units
Frame Size Contactor Models
Relay Setting Range Overload Part #
Overload Separate Mounting Units
A
100AF
MRC-75LAMRC-85LAMRC-100LAMRD-75LAMRD-85LAMRD-100LA
7~10 MTK-95/3-10L
UZ-95L
9~13 MTK-95/3-13L
12~18 MTK-95/3-18L
16~22 MTK-95/3-22L
18~25 MTK-95/3-25L
24~36 MTK-95/3-36L
28~40 MTK-95/3-40L
34~50 MTK-95/3-50L
45~65 MTK-95/3-65L
54~75 MTK-95/3-75L
63~85 MTK-95/3-85L
70~95 MTK-95/3-95L
80~100 MTK-95/3-100L
150AF
MRC-130LAMRC-150LAMRD-130LAMRD-150LA
34~50 MTK-150/3-50L
UZ-150L
45~65 MTK-150/3-65L
54~75 MTK-150/3-75L
63~85 MTK-150/3-85L
80~105 MTK-150/3-105L
95~130 MTK-150/3-130L
110~150 MTK-150/3-150L
225AF MRC-185AMRC-225A
65~100 MTK-225/3-100
N/A
85~125 MTK-225/3-125
100~160 MTK-225/3-160
120~185 MTK-225/3-185
160~240 MTK-225/3-240
400AF MRC-330AMRC-400A
85~125 MTK-400/3-125
N/A
100~160 MTK-400/3-160
120~185 MTK-400/3-185
160~240 MTK-400/3-240
200~330 MTK-400/3-330
260~400 MTK-400/3-400
800AF MRC-185AMRC-225A
200~300 MTK-800/3-300
N/A260~400 MTK-800/3-400
400~600 MTK-800/3-600
520~800 MTK-800/3-800
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MIRA ContaCtors and overload relays
3.11
2.17
1.420.86
2.87
4.17
2.83(3.91)
4.69(5.76) 1.85
1.61
3.62
3.94
3.70
2.76
1.77
1.04
5.35(6.78)
3.35(4.78)2.36
2.17
5.124.13
5.51
51
62
A1 A213 21 43 31
14 22 44 32
n
5
A1
Current
M
6
1 2
A2
1.770.46
M3.5
M4/M5
2.94
0.56
0.69
0.15 3.402.56
2.78
1.28
0.69
0.15 3.792.26
3.171.22
2.17
0.55
3.17
0.71
M3.5
M6
0.21
2.75
0.67
3.83
0.89
M3.5
M8
0.24
3.56
1.65
0.69
0.15 4.192.55
95-NC-96
2T1 4T2 6T3
97-NO-98
95-NC-96
2T1 4T2 6T397-NO-98
95-NC-96
2T1 4T2 6T3
97-NO-98
Aux terminal
Main terminal
Aux terminal
Main terminal
Aux terminal
Main terminal
(Main terminal)
(Aux terminal)
(Main terminal)
(Aux terminal)
(Main terminal)
(Aux terminal)
Overload Relays (40AF~100AF)
MTK-32
MTK-63
MTK-95
0.37lbs
0.67lbs
1.04lbs
[in]
thermal overload relays
MTK-150
MTK-225
MTK-400
MTK-800
Overload Relays (150AF~800AF)
12.60
9.84
14.17
1.57
6.30
7.05
9.06
19.6
9
20.8
7
7.87
6.30
M16(Main screw)
1.851.85
M10(Main screw)
2.58
4.47
7.24
3.35
5
7.80
4.76
4.43
5.94M12(Main screw)
5.63
6.73
M8(Main screw)
2.64 2.40
4.45
5.79
5.55
3.74
4.29
147
[in]
3.74
1.320.95M4(Mounting hole)
5.51
3.353.66
1.383.72 0.13
2.91
4.28
2.70
4.70
3.01
1.99
3.90
4.77
2.72
1.97
4
2.76
2.36
3.51
1.56
1.28
2.78
1.770.46 0.56
1.00
M4(Mounting hole)
4.23
2.17
1.570.710.55
1.66
M4/M5(34A)
M6
M4(Mounting hole)
3.72
5
4.72
4.33
0.67 0.89
1.76
M4(Mounting hole)
(Main terminal)
(Main terminal)
M8(Main Screw)
M8(Main terminal)
Main terminal
Aux terminal
Aux terminal
Aux terminal
Main terminal
Main terminal
Main terminal
Main terminal
Aux terminal
Main terminal
Main terminal
0.15lb
0.30lb
0.51lb
0.63lb
1.54lbs
5.51lbs
5.73lbs
25.35lbs
[in]
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MIRA ContaCtors and overload relays
Overload Relays (separate Mount)
UZ-32
UZ-63
UZ-95
UZ-150
12.60
9.84
14.17
1.57
6.30
7.05
9.06
19.6
9
20.8
7
7.87
6.30
M16(Main screw)
1.851.85
M10(Main screw)
2.58
4.47
7.24
3.35
5
7.80
4.76
4.43
5.94M12(Main screw)
5.63
6.73
M8(Main screw)
2.64 2.40
4.45
5.79
5.55
3.74
4.29
3.74
1.320.95M4(Mounting hole)
5.51
3.353.66
1.383.72 0.13
2.91
4.28
2.70
4.70
3.01
1.99
3.90
4.77
2.72
1.97
4
2.76
2.36
3.51
1.56
1.28
2.78
1.770.46 0.56
1.00
M4(Mounting hole)
4.23
2.17
1.570.710.55
1.66
M4/M5(34A)
M6
M4(Mounting hole)
3.72
5
4.72
4.33
0.67 0.89
1.76
M4(Mounting hole)
(Main terminal)
(Main terminal)
M8(Main Screw)
M8(Main terminal)
Main terminal
Aux terminal
Aux terminal
Aux terminal
Main terminal
Main terminal
Main terminal
Main terminal
Aux terminal
Main terminal
Main terminal
0.15lbs
0.30lbs
0.51lbs
0.63lbs
[in]
thermal overload relays
Certifications
Type Type Approvals CertificatesCertificate - IEC UL CSA GB IEC KEPIC
Mark and Name
Korea Europe U.S.A & Canada Canada Canada Netherlands Denmark Korea
Mira Contactors
MRC-9A
MRC-12A
MRC-18A
MRC-9B
MRC-12B
MRC-18B
MRC-22B
MRC-32B
MRC-40A
MRC-50LA
MRC-65LA
MRC-75LA
MRC-85LA
MRC-100LA
MRC-130LA
MRC-150LA
MRC-185A
MRC-225A
MRC-265A
MRC-330A
MRC-400A
MRC-500A
MRC-630A
MRC-800A
Thermal Overload
Relays Differential
MTK-12/3
MTK-32/3
MTK-63/3
MTK-95/3
MTK-150/3
MTK-225/3
MTK-400/3
MTK-800/3
CE U.S.A & cUL CSA CCC
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MIRA COnTACTORs And OvERlOAd RElAys
Marine certifications
Type Type ApprovalsCertificate
Mark and Name
Korea UK France Germany Norway U.S.A. Japan Italy
Mira Contactors
MRC-9A
MRC-12A
MRC-18A
MRC-9B
MRC-12B
MRC-18B
MRC-22B
MRC-32A
MRC-40A
MRC-50A
MRC-65A
MRC-75A
MRC-85A
MRC-100A
MRC-130A
MRC-150A
MRC-185A
MRC-225A
MRC-265A
MRC-330A
MRC-400A
MRC-500A
MRC-630A
MRC-800A
Thermal Overload
Relays Differential
MTK-12/3
MTK-32/3
MTK-63/3
MTK-95/3
MTK-150/3
MTK-225/3
MTK-400/3
MTK-800/3
KR LR BV GL DNV ABS NK1867