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© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard

E5010_ESD-R-SR • 9/12/2018

Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com

EMI Core – ESD-R-SR Toroidal Cores for Round Cables for Low Frequency at 150 kHz (Bare, coated & with case)

Performance Characteristics

Item

Performance Characteristics

Operating temperature

−25°C to +85°C

Frequency range

Low frequency

Outer diameter

31.0 – 59.0 mm

Inner diameter

19.0 – 36.0 mm

Thickness

12.7 – 21.0 mm

Type

Bare, coated, and case

Case flame resistant rating

UL94 V–2

Material

MnZn S15H

Table 1 – Ratings & Part Number Reference

Part

Number

Dimensions (mm)

Weight

Type

Color

Compatible

Toroid Core

(Bare Type)

Material

OD

ID

T

(g)

≤ 10 MHz

(AM band range)

≤ 300 MHz

(FM band range) MnZN

NiZn

ESD-R-31SR

31.0 ±0.8

20.0 ±0.8

14.9 ±0.5

32.5

Bare

—

—

X

S15H

—

ESD-R-38SR

38.0 ±0.8

19.0 ±0.8

12.7 ±0.5

52.5

Bare

—

—

X

S15H

—

ESD-R-47SR

47.0 ±1.0

27.0 ±0.8

15.0 ±0.5

83.4

Bare

—

—

X

S15H

—

ESD-R-57SR

57.0 ±1.5

36.0 ±1.0

20.0 ±0.5

139.5

Bare

—

—

X

S15H

—

ESD-R-31SR-P 32.0 Maximum 19.0 Minimum 16.0 Maximum

32.9

Coated

Gray

—

X

S15H

—

ESD-R-38SR-P 39.5 Maximum 18.0 Minimum 14.0 Maximum

53.3

Coated

Gray

—

X

S15H

—

ESD-R-47SR-P 48.5 Maximum 26.0 Minimum 16.0 Maximum

84.3

Coated

Gray

—

X

S15H

—

ESD-R-57SR-P 59.0 Maximum 34.0 Minimum 21.0 Maximum

141.5

Coated

Gray

—

X

S15H

—

ESD-R-47SRH 51.0 Maximum

24.4 ±1.0

19.0 Maximum

92.0

Case

White with blue tape

—

X

S18H

—

1

Frequency range is for reference only. Please test with actual device before use.

Impedance vs. Frequency

Bare Type