Chassis & P.C. Board Mount
PULSE TRANSFORMERS
Red
Blk
Blu
Yel
• Economical, open style, chassis mount.
• Mounting hole (G) - .187"
Brn
• Units are intended for pulse applications including
thyristor / triac firing circuits.
• Flexible leads - 4" minimum.
Org
612H
Blk
Yel
D.C. Winding
Resistance
Primary
Insulation
RMS
(Volts)
Dimensions
Circuit Max.
Volts
Wt.
Oz.
Cat. No. Ratio
Inductance D.C. Res.
mH (min.) (Ohms)
Sec. 1
(Ohms)
0.87
Sec. 2
(Ohms)
-
A
B
C
D
Brn
Org
612G
612H
1:1
1:1:1
600
600
6.6
1.5
0.87
0.45
4000
4000
8.0 2.06 1.25 1.19 1.75
8.0 2.06 1.25 1.19 1.75
0.42
0.49
612G
PULSE TRANSFORMERS
• These transformers are fully encapsulated in a high grade black molded case
with a UL94V-O rating.
• They are intended mainly for thyristor / triac triggering applications.
• All units are voltage proof tested between windings at 2500V RMS for 1
minute, for a working voltage rating maximum of 440V RMS.
• Transformers with three or more windings can be series connected to obtain
alternative ratios. (ie...a 1:1:1 type may be series connected by linking pins 4
& 5 in which case 3-6 are used as the primary winding to obtain a ratio of 2:1
etc.)
630 Series - Dimensions &
Schematic
25
2
6
5
4
3
1
D.C. Winding Resistance
20
Primary
Leakage
Inductance
uH (max)
Cat.
No.
Turns
Ratio
Capacity
pf. (max)
(ohms)
Inductance ET Constant
mH (min.)
All Dimensions in mm
Pins 0.64 sq.
Pri.
Sec.1 Sec. 2 Sec. 3
V uS
120
120
120
240
240
240
482
482
482
370
640
1160
890
1520
2760
630B
631B
632B
630C
631C
632C
630D
631D
632D
640A
640B
640C
641A
641B
641C
1:1
1:1:1
2:1:1
1:1
1:1:1
2:1:1
1:1
1:1:1
2:1:1
2:1:1:1
2:1:1:1
2:1:1:1
2:1:1:1
2:1:1:1
2:1:1:1
1
1
1
4
4
2.0
3
3.5
5
50
40
30
55
35
35
65
40
40
32
38
35
65
70
190
0.25
0.25
0.24
0.86
0.9
0.23
0.22
0.12
0.83
0.76
0.38
3.4
-
-
-
-
-
-
0.28
0.15
-
1.1
0.5
-
3
4
5
6
11
11
18
40
40
38
110
340
28
75
190
1
4
0.84
3.5
-
-
16.3
16.3
16.3
10
30
100
10
30
100
2
3.6
3.5
2.3
6.6
25.0
0.45
1.2
3.1
1.6
1.1
3.0
12.0
0.2
0.5
4.2
2.0
1.3
3.8
14.6
0.26
0.65
2.9
-
-
1.0
2.7
10.8
0.19
0.46
2.2
5.2
2.4
2
3
8
1
4
5
6
7
640 Series - Dimensions &
Schematic
Primary
Sec. 1
Feedback
or Sec. 3
Sec. 2
Dimensions
Cat. Series No.
640 Series
Tol.
a
b
c
-
v
w
x
y
z
Max.
Min.
Max.
Min.
25.0 12.7
-
36.0 20.2
-
17.98 12.9 7.82 5.28
1.2
1.1
1.2
1.1
-
4.0 17.58 12.47 7.42 4.88
28.12 20.52 12.90 7.82
4.0 27.72 20.12 12.47 7.42
-
641 Series
-
CANADA
Phone: (519) 822-2960 Fax: (519) 822-0715
USA
© 2000
66
Phone: (716) 651-0086 Fax: (716) 651-0726
www.hammondmfg.com