128
Kulka® Military Class
(A-A-59125) / (MIL-T-55164*)
Military/Navy Terminal Blocks
Datasheets available at marathonsp.com
These military blocks feature molded-in terminals in an
improved Kulka® design for greater strength and flexibility.
The mounting holes are covered with molded-in reinforce-
ment straddle plates.
Class Spec # Description Max Dielectric Max Screw RECMD Max MS17143 Max Lug RECMD Torque
Rated with Test Rated Size Wire Size Lug # Width Lb-In (N-M)
37 TB / 1 Double Screw 300 V 3000 V 15 Amp #6 #16 AWG -11 0.282” 8-10
RMS RMS 60 Hz [7.2] [0.9-1.1]
38 TB / 2 Double Screw 600 V 3400 V 20 Amp #6 #14 AWG -14 0.31” 8-10
RMS RMS 60 Hz [7.9] [0.9-1.1]
39 TB / 3 Double Screw 600 V 4000 V 30 Amp #8 #10 AWG -9 0.41” 10-12
RMS RMS 60 Hz [10.4] [1.1-1.4]
40 TB / 4 Single Screw 300 V 3000 V 7.5 Amp #6 #18 AWG -10 0.282” 8-10
Feed Thru RMS RMS 60 Hz [7.2] [0.9-1.1]
41 TB / 5 Single Screw 600 V 3400 V 10 Amp #6 #16 AWG -14 0.31” 8-10
Feed Thru RMS RMS 60 Hz [7.9] [0.9-1.1]
42 TB / 6 Single Screw 600 V 4000 V 15 Amp #8 #14 AWG -8 0.41” 10-12
Feed Thru RMS RMS 60 Hz [10.4] [1.1-1.4]
A-A-59125/
MIL-T-55164 Terminal Type Voltage Current Wire & Lug Information
Information
Military Class: Closed Back
Supercedes MIL-T-59125
*Marathon Special Products manufactures terminal blocks that are constructed to meet MIL-T-55164C and A-A-59125. Mil standard A-A-59125,
dated September 16, 1997, superceeds MIL-T-55164C. We will continue to supply the same parts for this spec. The CID identifier will be the
same class number as for MIL-T-55164C.
The old MIL-T-55164C standard required Group A and Group B testing. The Group B testing was required every three years. Since the new
A-A-59125 standard does not require Group B testing, we have elected to discontinue this test. We will continue to do Group A testing.
The following blocks are effected by this change:
Class/Spec #
37TB / 1
38TB / 2
39TB / 3
40TB / 4
41TB / 5
42TB / 6
37TB04B
129
Kulka® Military Class
(A-A-59125) / (MIL-T-55164)
Military/Navy Terminal Blocks
Datasheets available at marathonsp.com
Specifications:
• Base, Valox 420-SEO, Grey Color, 130°C
• Closed Back Design
• Screws, Brass Nickel Plate, 6-32 Binder Head, Slotted
• Terminals, Brass Nickel Plate, Ultrasonically Inserted
• 2-20 Poles, Consult Customer Service for Longer Lengths
• 3/8” Centers
• Flammability Rating 94 V-O
• Wire Size #16
• 15 Amps
• Parts are supplied with end plates
• RoHS Compliant
37TB-B/40TB-B Series
300 Volts AC/DC
Hardware Options:
Lug Types (Commercial):
3/4 ST 600 = Half Solder See Page 102
ST600 = Full Solder See Page 102
Feed-Thru Hardware Options:
Long Feed-Thru Solder
40TB B Only
Accessories: (Jumper Commercial Grade)
Marking Strips = MSA, MSB, MSC See Page 134
Jumper = J600, 600RJ, 600RJ(S) See Page 103
Service Options:
Consult Customer Service
Catalog Number Dimensions
Number of Poles A B
37TB02B 2 1.41 1.12
37TB03B 3 1.78 1.50
37TB04B 4 2.16 1.88
37TB05B 5 2.53 2.25
37TB06B 6 2.91 2.62
37TB07B 7 3.28 3.00
37TB08B 8 3.66 3.38
37TB09B 9 4.03 3.75
37TB10B 10 4.41 4.12
37TB11B 11 4.78 4.50
37TB12B 12 5.16 4.88
37TB13B 13 5.53 5.25
37TB14B 14 5.91 5.62
37TB15B 15 6.28 6.00
37TB16B 16 6.66 6.38
37TB17B 17 7.03 6.75
37TB18B 18 7.41 7.12
37TB19B 19 7.78 7.50
37TB20B 20 8.16 7.88
.38
[9.5]
.31
[7.9]
.63
[15.9]
.87
[22.1]
.33
[8.3]
.48
[12.1]
.31
[7.9]
#6-32 X .23[5.7]
BD HD SCREW
.14
[3.6]
B
A
∅.17
[∅4.3]
For electronic drawings or 2D/3D CAD data,
send request to drawings@marathonsp.com
37TB04B
40TB04B
130
Kulka® Military Class
(A-A-59125) / (MIL-T-55164)
Military/Navy Terminal Blocks
Datasheets available at marathonsp.com
37TB 02 F 2 1.360-1.453 1.109-1.156
37TB 03 F 3 1.735-1.828 1.484-1.531
37TB 04 F 4 2.110-2.203 1.859-1.906
37TB 05 F 5 2.500-2.593 2.234-2.281
37TB 06 F 6 2.876-2.969 2.609-2.656
37TB 07 F 7 3.250-3.343 2.984-3.031
37TB 08 F 8 3.626-3.719 3.359-3.406
37TB 09 F 9 4.000-4.093 3.734-3.781
37TB 10 F 10 4.376-4.469 4.109-4.156
37TB 11 F 11 4.750-4.843 4.484-4.531
37TB 12 F 12 5.126-5.219 4.859-4.906
37TB 13 F 13 5.500-5.593 5.234-5.281
37TB 14 F 14 5.876-5.969 5.609-5.656
37TB 15 F 15 6.250-6.365 5.969-6.047
37TB 16 F 16 6.626-6.735 6.344-6.422
37TB 17 F 17 7.000-7.109 6.719-6.797
37TB 18 F 18 7.376-7.485 7.094-7.172
37TB 19 F 19 7.752-7.812 7.469-7.547
37TB 20 F 20 8.127-8.187 7.844-7.922
37TB 21 F 21 8.502-8.562 8.219-8.297
37TB 22 F 22 8.877-8.937 8.594-8.672
37TB 23 F 23 9.252-9.312 8.969-9.047
37TB 24 F 24 9.627-9.687 9.344-9.422
37TB 25 F 25 10.002-10.062 9.719-9.797
37TB 26 F 26 10.377-10.437 10.094-10.172
37TB 27 F 27 10.752-10.812 10.469-10.547
37TB 28 F 28 11.127-11.187 10.844-10.922
37TB 29 F 29 11.502-11.562 11.219-11.297
37TB 30 F 30 11.877-11.937 11.594-11.672
37TB 31 F 31 12.252-12.312 11.969-12.047
Military Type Number Dimensions
Designation of poles A B
37TB-Military Class
(A-A-59125/1)/(MIL-T-55164/1)
Molded Material:
• Plastic: Grade F temperature rating 155°C per MIL-M-14
• Screws: Brass per QQ-W-321, nickel plated per QQ-N-290
• Terminal Plates: Brass per QQ-B-613, nickel plated per QQ-N-290
Electrical Rating:
• Rated voltage (maximum): 300 volts
• Current rating: 15 Amps
• D.W.V.: 3000 volts RMS
Molded Material:
• Plastic: Grade F temperature rating 155°C per MIL-M-14
• Screws: Brass per QQ-W-321, nickel plated per QQ-N-290
• Terminal Plates: Brass per QQ-B-613, nickel plated per QQ-N-290
Electrical Rating:
• Rated voltage (maximum): 600 volts
• Current rating: 20 Amps
• D.W.V.: 3400 volts RMS
38TB 02 F 2 1.579-1.672 1.296-1.343
38TB 03 F 3 2.016-2.109 1.734-1.781
38TB 04 F 4 2.454-2.547 2.172-2.219
38TB 05 F 5 2.891-2.984 2.609-2.656
38TB 06 F 6 3.329-3.422 3.046-3.093
38TB 07 F 7 3.766-3.859 3.484-3.531
38TB 08 F 8 4.204-4.297 3.937-3.984
38TB 09 F 9 4.641-4.734 4.375-4.422
38TB 10 F 10 5.079-5.172 4.812-4.859
38TB 11 F 11 5.532-5.625 5.250-5.297
38TB 12 F 12 5.969-6.078 5.687-5.734
38TB 13 F 13 6.407-6.516 6.110-6.188
38TB 14 F 14 6.844-6.953 6.547-6.625
38TB 15 F 15 7.282-7.391 6.985-7.063
38TB 16 F 16 7.719-7.828 7.422-7.500
38TB 17 F 17 8.157-8.266 7.860-7.938
38TB 18 F 18 8.594-8.703 8.297-8.375
38TB 19 F 19 9.079-9.156 8.750-8.828
38TB 20 F 20 9.517-9.594 9.188-9.266
38TB 21 F 21 9.954-10.031 9.625-9.703
38TB 22 F 22 10.392-10.469 10.063-10.141
38TB 23 F 23 10.829-10.906 10.500-10.578
Military Type Number Dimensions
Designation of poles A B
38TB-Military Class
(A-A-59125/2)/(MIL-T-55164/2)
mm=dim X 25.4
mm=dim X 25.4
.38
[9.5]
.31
[7.9]
.63
[15.9]
.88
[22.2]
.33
[8.3]
.46
[11.6]
∅.16
[∅4.2]
.30
[7.6]
#6-32 X .23[5.7]
BD HD SCREW
.14
[3.6] B
A
1.13
[28.6]
.39
[9.9]
.56
[14.2]
.82
[20.8]
.42
[10.7]
.33
[8.4]
.44
[11.1]
B
A
.16
[4.0] ∅.20
[∅5.0]
#6-32 UNC-2A x .25[6.3]
BD HD SCREW For electronic drawings or 2D/3D CAD data,
send request to drawings@marathonsp.com
131
Kulka® Military Class
(A-A-59125) / (MIL-T-55164)
Military/Navy Terminal Blocks
Datasheets available at marathonsp.com
39TB-Military Class
(A-A-59125/3)/(MIL-T-55164/3)
Molded Material:
• Plastic: Grade F temperature rating 155°C per MIL-M-14
• Screws: Brass per QQ-W-321, nickel plated per QQ-N-290
• Terminal Plates: Brass per QQ-B-613, nickel plated per QQ-N-290
Electrical Rating:
• Rated voltage (maximum): 600 volts
• Current rating: 30 Amps
• D.W.V.: 4000 volts RMS
Molded Material:
• Same as 37 TB Class
• Hardware: Lug, Brass per QQ-B-613, tin plated
Electrical Rating:
• Rated voltage (maximum): 300 volts
• Current rating: 7.5 Amps
• D.W.V.: 3000 volts RMS
40TB-Military Class
(A-A-59125/4)/(MIL-T-55164/4)
39TB 02 F 2 2.047-2.140 1.672-1.719
39TB 03 F 3 2.626-2.719 2.234-2.281
39TB 04 F 4 3.188-3.281 2.796-2.843
39TB 05 F 5 3.750-3.843 3.359-3.406
39TB 06 F 6 4.313-4.406 3.922-3.969
39TB 07 F 7 4.876-4.969 4.484-4.531
39TB 08 F 8 5.438-5.531 5.046-5.093
39TB 09 F 9 6.000-6.109 5.625-5.672
39TB 10 F 10 6.563-6.672 6.172-6.250
39TB 11 F 11 7.126-7.235 6.719-6.797
39TB 12 F 12 7.688-7.797 7.297-7.375
39TB 13 F 13 8.250-8.359 7.860-7.938
39TB 14 F 14 8.813-8.922 8.422-8.500
39TB 15 F 15 9.376-9.485 8.985-9.063
39TB 16 F 16 9.938-10.047 9.547-9.625
39TB 17 F 17 10.500-10.609 10.110-10.188
39TB 18 F 18 11.079-11.188 10.672-10.750
Military Type Number Dimensions
Designation of poles A B
mm=dim X 25.4
40TB 02 F 2 1.360-1.453 1.109-1.156
40TB 03 F 3 1.735-1.828 1.484-1.531
40TB 04 F 4 2.110-2.203 1.859-1.906
40TB 05 F 5 2.500-2.593 2.234-2.281
40TB 06 F 6 2.876-2.969 2.609-2.656
40TB 07 F 7 3.250-3.343 2.984-3.031
40TB 08 F 8 3.626-3.719 3.359-3.406
40TB 09 F 9 4.000-4.093 3.734-3.781
40TB 10 F 10 4.376-4.469 4.109-4.156
40TB 11 F 11 4.750-4.843 4.484-4.531
40TB 12 F 12 5.126-5.219 4.859-4.906
40TB 13 F 13 5.500-5.593 5.234-5.281
40TB 14 F 14 5.876-5.969 5.609-5.656
40TB 15 F 15 6.250-6.365 5.969-6.047
40TB 16 F 16 6.626-6.735 6.344-6.422
40TB 17 F 17 7.000-7.109 6.719-6.797
40TB 18 F 18 7.376-7.485 7.094-7.172
40TB 19 F 19 7.752-7.812 7.469-7.547
40TB 20 F 20 8.127-8.187 7.844-7.922
40TB 21 F 21 8.502-8.562 8.219-8.297
40TB 22 F 22 8.877-8.937 8.594-8.672
40TB 23 F 23 9.252-9.312 8.969-9.047
40TB 24 F 24 9.627-9.687 9.344-9.422
40TB 25 F 25 10.002-10.062 9.719-9.797
40TB 26 F 26 10.377-10.437 10.094-10.172
40TB 27 F 27 10.752-10.812 10.469-10.547
40TB 28 F 28 11.127-11.187 10.844-10.922
40TB 29 F 29 11.502-11.562 11.219-11.297
40TB 30 F 30 11.877-11.937 11.594-11.672
40TB 31 F 31 12.252-12.312 11.969-12.047
Military Type Number Dimensions
Designation of poles A B
mm=dim X 25.4
.38
[9.5]
A
B
.14
[3.6]
∅.16
[∅4.2]
.31
[7.9]
#6-32 UNC-2A x .22[5.6]
BD HD SCREW
.30
[7.6]
.88
[22.2]
.46
[11.6]
.33
[8.3]
.63
[15.9]
FEED THRU
SOLDER LUG
.44
[11.3]
1.31
[33.3]
.45
[11.4]
.94
[23.8]
.69
[17.4]
.50
[12.7]
.56
[14.3]
B
A
.20
[5.2]
.43
[10.8]
∅.22
[∅5.7]
#8-32 UNC-2A x .281[7.1]
BD HD SCREW
For electronic drawings or 2D/3D CAD data,
send request to drawings@marathonsp.com
132
Kulka® Military Class
(A-A-59125) / (MIL-T-55164)
Military/Navy Terminal Blocks
Datasheets available at marathonsp.com
41TB-Military Class
(A-A-59125/5)/(MIL-T-55164/5)
42TB-Military Class
(A-A-59125/6)/(MIL-T-55164/6)
∅.20
[∅5.0]
B
A
.16
[4.0]
.44
[11.1]
#6-32 UNC-2A x .25[6.3]
BD HD SCREW
.42
[10.7]
.33
[8.4]
1.13
[28.6]
.56
[14.2]
.39
[9.9]
.82
[20.8]
FEED THRU
SOLDER LUG
.63
[15.9]
#8-32 UNC-2A x .281[7.1]
BD HD SCREW
.43
[10.8]
.50
[12.7]
A
B
.20
[5.2]
.56
[14.3]
∅.22
[∅5.7]
1.31
[33.3]
.45
[11.4]
.69
[17.4]
.94
[23.8]
FEED THRU
SOLDER LUG
.63
[15.9]
Molded Material:
• Same as 38 TB Class
• Hardware: Lug, Brass per QQ-B-613, tin plated
Electrical Rating:
• Rated voltage (maximum): 600 volts
• Current rating: 10 Amps
• D.W.V.: 3400 volts RMS
Molded Material:
• Same as 39 TB Class
• Hardware: Lug, Brass per QQ-B-613, tin plated
Electrical Rating:
• Rated voltage (maximum): 600 volts
• Current rating: 15 Amps
• D.W.V.: 3400 volts RMS
41TB 02 F 2 1.579-1.672 1.296-1.343
41TB 03 F 3 2.016-2.109 1.734-1.781
41TB 04 F 4 2.454-2.547 2.172-2.219
41TB 05 F 5 2.891-2.984 2.609-2.656
41TB 06 F 6 3.329-3.422 3.046-3.093
41TB 07 F 7 3.766-3.859 3.484-3.531
41TB 08 F 8 4.204-4.297 3.937-3.984
41TB 09 F 9 4.641-4.734 4.375-4.422
41TB 10 F 10 5.079-5.172 4.812-4.859
41TB 11 F 11 5.532-5.625 5.250-5.297
41TB 12 F 12 5.969-6.078 5.687-5.734
41TB 13 F 13 6.407-6.516 6.110-6.188
41TB 14 F 14 6.844-6.953 6.547-6.625
41TB 15 F 15 7.282-7.391 6.985-7.063
41TB 16 F 16 7.719-7.828 7.422-7.500
41TB 17 F 17 8.157-8.266 7.860-7.938
41TB 18 F 18 8.594-8.703 8.297-8.375
41TB 19 F 19 9.079-9.156 8.750-8.828
41TB 20 F 20 9.517-9.594 9.188-9.266
41TB 21 F 21 9.954-10.031 9.625-9.703
41TB 22 F 22 10.392-10.469 10.063-10.141
41TB 23 F 23 10.829-10.906 10.500-10.578
Military Type Number Dimensions
Designation of poles A B
mm=dim X 25.4
mm=dim X 25.4
42TB 02 F 2 2.047-2.140 1.672-1.719
42TB 03 F 3 2.626-2.719 2.234-2.281
42TB 04 F 4 3.188-3.281 2.796-2.843
42TB 05 F 5 3.750-3.843 3.359-3.406
42TB 06 F 6 4.313-4.406 3.922-3.969
42TB 07 F 7 4.876-4.969 4.484-4.531
42TB 08 F 8 5.438-5.531 5.046-5.093
42TB 09 F 9 6.000-6.109 5.625-5.672
42TB 10 F 10 6.563-6.672 6.172-6.250
42TB 11 F 11 7.126-7.235 6.719-6.797
42TB 12 F 12 7.688-7.797 7.297-7.375
42TB 13 F 13 8.250-8.359 7.860-7.938
42TB 14 F 14 8.813-8.922 8.422-8.500
42TB 15 F 15 9.376-9.485 8.985-9.063
42TB 16 F 16 9.938-10.047 9.547-9.625
42TB 17 F 17 10.500-10.609 10.110-10.188
42TB 18 F 18 10.079-11.188 10.672-10.750
Military Type Number Dimensions
Designation of poles A B
For electronic drawings or 2D/3D CAD data,
send request to drawings@marathonsp.com
1.22
[31.0]
.16
[4.1]
1.22
[31.0]
.03
[.76]
.28
[7.1]
.31
[7.9]
Ø .09
[2.3]
(2 HOLES)
.75
[19.1]
.16
[4.0]
.69
[17.5]
.06
[1.6]
Ø
.144
[3.6]
(2 HOLES)
133
Kulka® Military Class
(A-A-59125) / (MIL-T-55164)
*Solder Hardware Dimensions are not to Mil Spec
Military/Navy Terminal Blocks
Datasheets available at marathonsp.com
This is an assembly of the 37TB Class Terminal Board and
a two-sided terminal lug (ST600). Available in lengths from 2
terminals through 31 terminals. Lugs are brass, tin plated.
This is an assembly of the 37TB Class Terminal Board and a
one-sided terminal lug (3/4 ST600). Available in lengths from 2
terminals through 31 terminals. Lugs are brass, tin plated.
This is an assembly of the 38TB Class Terminal Board and
a two-sided terminal lug (ST601). Available in lengths from 2
terminals through 23 terminals. Lugs are brass, tin plated.
This is an assembly of the 38TB Class Terminal Board and a
one-sided terminal lug (3/4 ST601). Available in lengths from 2
terminals through 23 terminals. Lugs are brass, tin plated.
This is an assembly of the 39TB Class Terminal Board and
a two-sided terminal lug (ST602). Available in lengths from 2
terminals through 18 terminals. Lugs are brass, tin plated.
This is an assembly of the 39TB Class Terminal Board and a
one-sided terminal lug (3/4 ST602). Available in lengths from 2
terminals through 18 terminals. Lugs are brass, tin plated.
1.58
[40.1]
Ø.15 2-HOLES
[3.8]
.94
[23.8]
.22
[5.6]
.84
[21.4]
1.58
[40.1]
.42
[11]
Ø.13 2-HOLES
[3.3]
.036
[.91]
.06
[1.6]
.31
[7.9]
.22
[5.6]
.41
[10]
.28
[7.1]
.50
[13] Ø.13 2-HOLES
[3.3]
.28
[7.1]
.09
[2.4]
1.85
[47.0]
1.85
[47.0]
1.06
[26.9]
.94
[23.9] .037
[0.9]
Ø.177 2-HOLES
[4.5]
.31
[7.9]
Ø.09 HOLE
[2.3]
.45
[11]
.16
[4.0]
.23
[5.9]
.922
[23]
.28
[7.1]
.16
[4.1]
.06
[1.6]
Ø.144 2-HOLES
[3.6]
.03
[0.8]
.42
[11]
.58
[15]
.22
[5.6]
.31
[7.9]
Ø.15 2-HOLES
[3.8]
.32
[8.1]
.22
[5.6]
.06
[1.6]
Ø.13 2-HOLES
[3.3]
1.17
[29.7]
.036
[.91]
.69
[18]
.50
[13]
.28
[7.1]
.41
[10]
.28
[7.1]
.39
[9.9]
.09
[2.4]
Ø.13 HOLE
[3.3]
1.37
[34.8]
.037
[0.9]
Ø.177 2-HOLES
[4.5]
37TBLD (Commercial Equivalent) 37TBLS (Commercial Equivalent)
38TBLD (Commercial Equivalent) 38TBLS (Commercial Equivalent)
39TBLD (Commercial Equivalent) 39TBLS (Commercial Equivalent)
For electronic drawings or 2D/3D CAD data, send request to drawings@marathonsp.com
To ensure solderability, use within six (6) months.
134
Kulka® Military Class Marking Strips
Military/Navy Terminal Blocks
Datasheets available at marathonsp.com
Marking Styles MSA, MSB, MSC
Top Surface of Marking Strip
Bottom Surface of Marking Strip
Requirements:
Type Mount: Bottom Only
Dimensions: See Page 110 for Charts
Material: Type GME
Marking: Marking Strips shall be Marked in Accordance with CID A-A-59125
(can be provided to MIL T55164)
A single letter shall be inserted in the above type designation to specify the marking style (A, B or C).
Both the front and the back of the marking strips shall be marked as indicated. The numbers shall be marked at a
45 ± 2° angle with reference to the side of the marking strip, as indicated.
Type MSC37TB (blank single sided marking strip) shall have the same dimensions as type MSA.
MSA
MSA
MSB
MSB (blank)
MSC (blank)
MSC (blank)
1 2 3 4 1 2 3 4
4 3 2 1
4 3 2 1
