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For More Information
Performance warranty of products oered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product names mentioned herein may
be trademarks or registered trademarks of their respective owners. © Copyright, 2018. Pulse Electronics, Inc. All rights reserved.
Current Sense Transformers
FIS 1X5 Series
P537.B (03/18)
Current sense transformers provide output feedback to the pulse
control circuitry allowing low-cost regulation of switch-mode power
supplies
Fully encapsulated construction
Isolation primary to secondary: 4000V AC
25A maximum primary current, 500kHz maximum frequency
Applications: switch-mode power supplies, lighting, switch controls
FISXXX
Mechanicals Schematics
Electrical Specifications @ 25°C - Operating Temperature -40°C to +125°C
Part No.
Prim/Sec
Ratio
Sec L
(mH MIN)
Sec DCR
(Ω MAX)
V x τ
(MAX)
FIS105NL 1:50 4.7 0.5 175 µVS
FIS115NL 1:100 18 2.0 350 µVS
FIS125NL 1:200 76 4.5 700 µVS
FIS155NL 1:500 470 16.0 1750 µVS
FIS1105NL 1:1000 1900 50.0 3500 µVS
1
2F
Rt (Ω): Recommended Terminating Resistance * Contact Pulse for availability
Is (A): sec. current F(Hz): Frequency
3
5
2
1
Weight .......................7.0 grams ....................8.0 grams
Tray ................................30/tray ........................34/tray
Dimension: mm
FIS105NL/15NL/25NL/55NL FIS1105NL
Unless otherwise specified, all tolerances are ± 0.50
Notes:
L: Inductance: (1-3) tested at 10 KHz & 10 mV
V x τ: V = Rt x ls τ =
