Datasheet(PDF format)

November 3, 2005
ROMOLAND, INC.
4257-000X SERIES
TRANSFORMER MICROMINIATURE PULSE
Features
•
•
•
•
•
•
•
Dielectric Strength 250Vrms
Insulation Resistance 10,000 Megohms
Maximum Average Power 25 mW
Peak Pulse Voltage 50 Volts
MIL-PRF-21038 Seal Construction
High Performance to Size Ratio
Application Engineering Service: Engineering Data
Available on Request
Electricial Specification at 25°C
•
Transformer
P/N
4257 -0001
Turns Ratio
Pri:Sec:Ter
Primary
Inductance
µH (±20%)
ET
Constant
Volt µSec
30
2.6
1:1:1
4257 -0002
1:1:1
60
307
4257 -0003
1:1:1
250
3.3
4257 -0004
1:1:1
500
4.8
4257 -0005
2:1:1
30
2.6
4257 -0006
2:1:1
60
3.7
4257 -0007
2:1:1
250
3.3
4257 -0008
2:1:1
500
4.8
1
Leakage
Inductance
µH (Max)
.13
.14
.17
.22
.30
.33
.38
.50
Effective Distributed
Capacitance
1-2 (1,3,5 GND) pF (Max)
1–2
3–4
5-6
9.0
.38
.38
.38
5
11.5
.45
.45
.45
5
15.5
.57
.57
.57
5
25.0
.81
.81
.81
5
7.5
.38
.38
.38
4
8.5
.50
.50
.50
4
11.5
.60
.60
.60
4
15.5
.81
.81
.81
4
.40 MAX
10.2
3 5
DCR Ω ±20%
Interwind
Capacitance
pF (Max)
.30 MAX
7.62
.170 MAX
4.32
2
4 6
2.00
12.7
.015 MIN
.38
Ø .019 TYP
0.49
SCHEMATIC
.10
2.54
.30
7.62
1
3
5
Datatronics:
2
4
6
.20
5.08
Notes:
1. Dimensions are in inches/mm.
2. Tolerences inches .XXX ± .010
mm .XX ± 25
3. Drawing is not to scale.
28151 Highway 74, Romoland, CA 92585 Tel: 951-928-7700 Toll Free Tel: 888-889-5391 Fax: 951-928-7701
Email: romolandsales@datatronics.com