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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.
37TBXXB and 40TBXXB are constructed and qualified to meet A-A-59125 only.
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