IT249 Schaffner EMC Inc, IT249 Datasheet - Page 2

• Manufacturer Part Number: IT249
• Description: Pulse Transformers
• Manufacturer: Schaffner EMC Inc
• Series: ITr
• Type: Pulse Transformersr

Specifications of IT249

• Transformer Type: Data/Voice Coupling
• Inductance: 17mH
• Turns Ratio - Primary:secondary: 2 : 1 : 1
• Mounting Type: Through Hole
• Primary Voltage Rating: 500 V
• Secondary Voltage Rating: 3.2 KV
• Mounting Style: PCB
• Dimensions: 17.6 mm L x 16.7 mm W x 11.3 mm H
• Product: Pulse Transformers
• Height: 11.3 mm
• Length: 17.6 mm
• Operating Temperature Range: - 25 C to + 70 C
• Secondary Resistance: 1.3 Ohms
• Termination Style: Through Hole
• Turns Ratio: 2:1:1
• Width: 16.7 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• E.t.: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 22-486; 817-1516; IT 249

Pulse transformer selection table
Pulse transformer
IT 143
IT 153
IT 242
IT 243
IT 213
IT 233
IT 253
IT 312
IT 313
IT 249
IT 154
IT 244
IT 234
IT 314
Explanations:
–
–
–
–
Mechanical data
IT 213
H
IT 242
H
K
I
IT 312, IT 313, IT 314
H
H
I
> Components
t r rise time at given load resistor R and 70% of the output pulse height.
L p primary inductance measured at 1kHz (secondary coile open).
L str stray inductance measured at the secondary side, short circuit at the primary side. If there are several secondary coils only one at the time is connected (measuring frequency 10kHz).
The ignition current is a set peak value where the voltage drop over the coil resistance is still insignificant (mostly below 1V).
2
1
6
4
2
3
3
4
H
A
K
G
A
G
2
5
4
L
H
5
6
1
6
5
3
1
L
L
L
B
B
G
> IT series
A
Turns ratio
1:1:1
1:1:1
1:1:1
1:1:1
1:1:1
1:1:1
1:1:1
1:1:1
1:1:1
2:1:1
3:1:1
3:1:1
3:1:1
3:1:1
C
C
F
C
F
Ignition
current
D
F
D
0.025
0.25
0.25
0.25
0.25
0.25
0.25
E
I
0.1
0.1
0.1
0.1
0.1
[A]
E
ign
D
1
1
E
U
500
500
500
500
380
500
500
380
380
500
500
500
500
380
nom
[V]
Voltage
5
3
1
5
6
1
6
[kV]
4
3.2
3.2
2.5
3.2
2.5
2.5
3.2
3.2
2.5
U
Prim.
Prim.
4
4
4
4
4
p
2
5
time area
3
Voltage
2
1
6
4
2
3
4
[Vμs]
1200
800
600
250
250
450
300
160
450
330
600
200
280
500
V
0t
time
Rise
[μs]
0.6
1.4
0.9
0.4
1.3
1.3
0.6
1.3
0.7
IT 243, IT 244, IT 249, IT 253
H
K
I
IT 143, IT 153, IT 154, IT 233, IT 234
H
H
I
t
1
1
4
1
1
r
[mH]
6
4
2
Inductance
2.5
2.5
6.5
1.1
15
21
17
75
15
17
35
L
1
3
5
9
3
3
p
A
G
G
L
A
5
3
1
[μH]
L
200
120
140
180
L
2
4
6
75 0.75
85
20
45
45 0.55
35
70
40
20
str
6 0.33
L
B
L
Resistance
1.5
0.8
1.4
0.8
2.4
3.1
7.5
2.8
1.6
[Ω]
R
3
2
B
p
0.75
0.55
[Ω]
1.5
0.8
1.4
0.8
2.7
0.4
1.5
2.2
0.9
0.7
0.7
R
3
s
capacitance
Coupling
C
F
C
F
[pF]
D
C
10
10
40
30
27
30
7
7
7
6
9
9
9
9
k
D
E
E
Input/Output
connections
02
02
02
02
02
02
02
02
02
02
02
02
02
02
2
4
6
5
3
1
Prim.
Weight
Prim.
[g]
14
14
13
24
24
14
13
25
1
3
5
6
6
9
6
6
6
6
4
2