Current Sense Transformers

SURFACE MOUNT CURRENT SENSE TRANSFORMERS:

PICO ELECTRONICS, Inc. has developed a new series of Current Sense Transformers. This new 38000 Series of transformers come in three different sizes in both thru hole and surface mount packages.
The CURRENT SENSE TRANSFORMER is used for monitoring and controlling circuits as well as detecting changing loads in Power Supplies. These devices are used in a variety of applications which includes automotive, industrial, medical, and aerospace applications.
Because of the advantages of sensing the current while maintaining the electrical isolation, these devices are suitable in designing power supplies. Compared to different techniques or current measurement, the Current Sense Transformers offer higher efficiency, accuracy and are less sensitive to temperature shifts.

Specifications

MIL-PRF-27:ALL UNITS MANUFACTURED TO MIL-PRF-27, Grade 5, Class S
OPERATING TEMPERATURE: -55º C to +130º C
DIELECTRIC WITHSTANDING VOLTAGE: 500Vac
INSULATION RESISTANCE: 10K MegaOhms at 500 V DC
FREQUENCY RANGE:50KHz to 500 KHz
CURRENT RATING: 5 to 20 Amps
TURNS RATIO: from 1:30 up to 1:100
Terminals: Meets solderability per MIL-STD-202, Method 208.

Larger size schematic

Schematic for Current Sense Transformer

SURFACE MOUNT PART NUMBER	SECONDARY INDUCTANCE (Minimum) (mH)	PRIMARY CURRENT (Amps)	TURNS RATIO	SECONDARY DC RESISTANCE (Ohms)	SIZE	PRICE (1-9) (USD)
38100SM 38105SM 38110SM 38115SM 38120SM 38125SM	0.49 0.87 1.36 1.95 2.66 5.40	5 5 5 5 5 5	1:30 1:40 1:50 1:60 1:70 1:100	0.137 0.280 0.440 0.670 1.230 3.550	1 1 1 1 1 1	58.12 58.12 58.12 58.12 58.12 58.12
38200SM 38205SM 38210SM 38215SM 38220SM 38225SM	1.62 2.90 4.50 6.50 8.82 18.0	15 15 15 15 15 15	1:30 1:40 1:50 1:60 1:70 1:100	0.027 0.150 0.300 0.440 0.830 2.150	2 2 2 2 2 2	58.12 58.12 58.12 58.12 58.12 58.12
38300SM 38305SM 38310SM 38315SM 38320SM 38325SM	2.40 4.27 6.67 9.60 13.07 26.66	20 20 20 20 20 20	1:30 1:40 1:50 1:60 1:70 1:100	0.055 0.082 0.160 0.300 0.440 1.230	3 3 3 3 3 3	63.91 63.91 93.91 63.91 63.91 63.91

**Discount Prices:

1-9 Net;
10-24 less 10%;
25-49 less 16%;
50-99 less 23%;
100-499 less 30%

Surface Mount Mechanical Drawing

Larger size schematic

SURFACE MOUNT DIMENSIONS

SIZE	HEIGHT	A	B	C	D	E	F
1	0.180 (4.57)	0.380 (9.65)	0.280 7.11	0.025 (0.64)	0.015 (0.38)	0.500 (12.7)	0.060 (1.52)
2	0.270 (6.86)	0.550 (13.97)	0.400 (10.16)	0.030 (0.76)	0.015 (0.38)	0.670 (17.02)	0.060 (1.52)
3	0.350 (8.9)	0.650 (16.51)	0.500 (12.7)	0.030 (0.76)	0.020 (0.51)	0.770 (19.56)	0.060 (1.52)
Dimensions are in inches. ( ) = millimeters