IT248 Schaffner EMC Inc, IT248 Datasheet - Page 2

• Manufacturer Part Number: IT248
• Description: XFRMR PULSE 2:1 SGL 17MH .25A
• Manufacturer: Schaffner EMC Inc
• Series: ITr
• Type: Pulse Transformersr

Specifications of IT248

• Transformer Type: Data/Voice Coupling
• Inductance: 17mH
• Turns Ratio - Primary:secondary: 2 : 1
• Mounting Type: Through Hole
• Primary Voltage Rating: 750 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: 1.5 Ohms
• Termination Style: Through Hole
• Turns Ratio: 2:1
• 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: 22-485; 817-1515; IT 248

Pulse transformer selection table
Pulse transformer
IT 155
IT 245
IT 237
IT 239
IT 255
IT 258
IT 370
IT 364*
IT 246
IT 248
IT 362*
IT 260
*
Explanations:
–
–
–
–
> Components
Not suitable for PCB-mounting.
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).
> IT series
Turns ratio
1:1
1:1
1:1
1:1
1:1
1:1
1:1
1:1
2:1
2:1
2:1
3:1
Ignition
current
0.25
0.25
0.25
0.25
I
0.1
0.1
0.1
0.1
[A]
ign
1
1
3
3
U
1000
1000
3000
1000
500
750
500
750
750
750
750
500
nom
[V]
Voltage
[kV]
2.5
3.2
3.2
3.2
U
4
4
6
4
5
8
4
5
p
time area
Voltage
[Vμs]
1100
4000
5000
3500
480
500
300
250
250
200
350
200
V
0t
time
Rise
0.25
[μs]
1.2
2.3
1.1
0.6
1.7
0.4
2.2
0.4
0.3
t
1
1
r
[mH]
Inductance
2.2
2.5
0.3
1.5
25
17
12
L
5
8
3
7
3
p
[μH]
100 1.48
L
85
35
80
40
10 0.16
35
80
25
30
str
3 0.62
6 0.16
Resistance
1.2
1.9
0.9
0.8
2.1
3.2
2.4
[Ω]
R
2
p
1.48
0.75
0.18
0.14
[Ω]
1.2
2.2
0.9
0.8
1.1
1.6
0.3
0.8
R
s
capacitance
Coupling
[pF]
C
10
50
80
40
35
20
6
5
8
7
9
8
k
Input/Output
connections
02
02
02
02
02
02
02
02
02
02
05
05
Weight
220
360
[g]
13
14
13
71
6
6
6
6
6
6