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LOW VOLTAGE - OPEN STYLE
CHASSIS MOUNT - 186 / 187 SERIES
• Choice of two primaries: Single Primary 115VAC or Dual Primary
115/230 VAC.
• Either series operates on 50/60 Hz.
• Combination solder or quick connect terminals.
• Split bobbin construction eliminates need for electrostatic shield.
• Hi-pot tested to 2 KV RMS.
• Economical open style, channel frame - chassis mount design
• UL recognized & CSA certified
• For more information on this series, go to:
http://www.hammondmfg.com/186_187.htm
Transformer Schematics - Dual Primary (186 Series)
1
5
2
T
T ER
18
TE ERM M 1
6B
RM
-T
XX
5-T 3-TE ERM
ER RM 2
M 7 4: : 11
-TE 11 5V JS
RM 5V
XX
XX
8: X 50/
.E
20
XV 60H
8
7
CT z
ED 860
X
7
DAXXA
TE
6
C
7
5
TE
18
TE TER RM 1
RM M
6D
6-T 4-TETER
XX
ER RM M 2
M8 5 :1
-TE : 11 15V J
SX
RM 5V
XX
10: 50
X
E2
XX /60
07
10
VC Hz
ED 860
TX
9
DA XA
T
E
8
7
6
C
B
1
2
B
E
3
4
8
4
5
3
D
A
PRI
E
4
2
1
D
A
SEC
3
2
4
5
1
3/16" Dia.
PRI
3/16" Dia.
Figure 6B
6
8
10
SEC
Figure 6D
Transformer Schematics - Single Primary (187 Series)
4
1
18
TE TER
RM M
7A
4-T 1-TE
XX
ER RM
M5
-TE 3: 1
RM 15V JSX
6: X 50 XXX
E
XV /60
CT Hz 2E0786
6
D 0
XX
DA A
TE
5
C
5
T
TE ERM
18
RM
7B
5-T 2-TE
XX
ER RM
M 7 3:
-TE 11
RM 5V JSXX
8: X 50/ XX
XV 60H
CT
z
XX
8
A
DA
7
TE
6
5
C
4
B
3
5
E2
07
ED 860
E
6
PRI
E
D
1
A
SEC
D
8
3
2
Figure 7B
6
E2
07
ED 860
2
B
E
4
A
8
4
5
D
10
3
2
SEC
3/16" Dia.
Figure 7A
C
1
PRI
3/16" Dia.
T
TE ERM
18
RM
7D
6-T 2-TE
XX
ER RM
M 8 4:
-TE 11
RM 5V JSXX
10: 50/ XX
XX 60H
10
VC
z
TX
9
X
DA A
TE
8
7
6
7
3
4
3
A
2
B
1
PRI
SEC
VA
Size
2.34 - 2.50
5.60 - 6.40
12 - 12.8
30 - 32
50 - 60
98 - 102
Length
(A)
2.06
2.37
2.81
3.25
3.68
4.03
Dimensions (Inches)
Depth
(Not Including
Mtg.
Terminals)
Height Centers
(B)
(C)
(D)
1.06
1.18
1.75
1.25
1.37
2.00
1.37
1.62
2.37
1.68
1.93
2.81
1.81
2.25
3.12
2.25
2.56
3.50
Depth
To Terminal
(E)
1.435
1.625
1.725
2.055
2.185
2.625
3/16" Dia.
Figure 7D
August 2008
Part Number
Single
Primary
115VAC
187A10
187B10
187C10
187D10
187E10
187F10
187A12
187B12
187C12
187D12
187E12
187F12
187A16
187B16
187C16
187D16
187E16
187F16
187A20
187B20
187C20
187D20
187E20
187F20
187A24
187B24
187C24
187D24
187E24
187F24
187A28
187B28
187C28
187D28
187E28
187F28
187A36
187B36
187C36
187D36
187E36
187F36
187A48
187B48
187C48
187D48
187E48
187F48
187A56
187B56
187C56
187D56
187E56
187F56
187A120
187B120
187C120
187D120
187E120
187F120
Fig.
7A
7B
7B
7D
7D
7D
7A
7B
7B
7D
7D
7D
7A
7B
7B
7D
7D
7D
7A
7B
7B
7D
7D
7D
7A
7B
7B
7D
7D
7D
7A
7B
7B
7D
7D
7D
7A
7B
7B
7D
7D
7D
7A
7B
7B
7D
7D
7D
7A
7B
7B
7D
7D
7D
7A
7B
7B
7D
7D
7D
Part Number
Dual
Primary
115/230VAC
NOT AVAILABLE
186B10
186C10
186D10
186E10
186F10
NOT AVAILABLE
186B12
186C12
186D12
186E12
186F12
NOT AVAILABLE
186B16
186C16
186D16
186E16
186F16
NOT AVAILABLE
186B20
186C20
186D20
186E20
186F20
NOT AVAILABLE
186B24
186C24
186D24
186E24
186F24
NOT AVAILABLE
186B28
186C28
186D28
186E28
186F28
NOT AVAILABLE
186B36
186C36
186D36
186E36
186F36
NOT AVAILABLE
186B48
186C48
186D48
186E48
186F48
NOT AVAILABLE
186B56
186C56
186D56
186E56
186F56
NOT AVAILABLE
186B120
186C120
186D120
186E120
186F120
Secondary (RMS)
Fig.
6B
6B
6D
6D
6D
6B
6B
6D
6D
6D
6B
6B
6D
6D
6D
6B
6B
6D
6D
6D
6B
6B
6D
6D
6D
6B
6B
6D
6D
6D
6B
6B
6D
6D
6D
6B
6B
6D
6D
6D
6B
6B
6D
6D
6D
6B
6B
6D
6D
6D
VAC
Current
(Amps)
10V C.T.
10V C.T.
10V C.T.
10V C.T.
10V C.T.
10V C.T.
12.6V C.T.
12.6V C.T.
12.6V C.T.
12.6V C.T.
12.6V C.T.
12.6V C.T.
16V C.T.
16V C.T.
16V C.T.
16V C.T.
16V C.T.
16V C.T.
20V C.T.
20V C.T.
20V C.T.
20V C.T.
20V C.T.
20V C.T.
24V C.T.
24V C.T.
24V C.T.
24V C.T.
24V C.T.
24V C.T.
28V C.T.
28V C.T.
28V C.T.
28V C.T.
28V C.T.
28V C.T.
36V C.T.
36V C.T.
36V C.T.
36V C.T.
36V C.T.
36V C.T.
48V C.T.
48V C.T.
48V C.T.
48V C.T.
48V C.T.
48V C.T.
56V C.T.
56V C.T.
56V C.T.
56V C.T.
56V C.T.
56V C.T.
120V C.T.
120V C.T.
120V C.T.
120V C.T.
120V C.T.
120V C.T.
0.25
0.60
1.20
3.00
5.00
10.00
0.19
0.50
1.00
2.50
4.00
8.00
0.15
0.40
0.80
2.00
3.50
6.25
0.12
0.30
0.60
1.50
2.80
5.00
0.10
0.25
0.50
1.25
2.40
4.00
0.08
0.20
0.42
1.07
2.00
3.57
0.06
0.17
0.35
0.85
1.50
2.80
0.05
0.12
0.25
0.62
1.20
2.00
0.04
0.11
0.21
0.53
1.00
1.80
0.02
0.05
0.10
0.25
0.50
0.85
VA
Rating
2.5
6.0
12.0
30.0
50.0
100.0
2.5
6.3
12.6
31.5
50.4
100.8
2.4
6.4
12.8
32.0
56.0
100.0
2.4
6.0
12.0
30.0
56.0
100.0
2.4
6.0
12.0
30.0
57.6
96.0
2.4
5.6
12.0
30.0
56.0
100.0
2.34
6.12
12.6
30.6
54.0
100.8
2.4
6.0
12.0
30.0
57.6
96.0
2.5
6.16
12.3
30.0
56.0
100.8
2.4
6.0
12.0
30.0
60.0
102.0
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