API TECHNOLOGIES

• 8061 Avonia Rd. • Fairview, PA 16415 • Ph: 814-474-1571 • Fax: 814-474-3110 • eis.apitech.com

API TECHNOLOGIES’ SPECTRUM CONTROL GmbH

• Hansastrasse 6 • 91126 Schwabach, Germany • Phone: (49)-9122-795-0 • Fax: (49)-9122-795-58

SM21

Through-hole Filters

High Frequency PCB Filters

PMS 279 neg.

Black neg.

API Technologies’ Spectrum Control line of high frequency

PCB filter provides EMI filtering to protect low power

digital circuits, while meeting most government and

industrial specifications for EMI control. With low assembly

and installation costs, the PCB filter helps keep your

project on budget. By mounting the PCB filter at the

source of the problem, we eliminate the need for

additional filtering at other points in the circuit. The filter

mounts directly to a printed circuit board with no mounting

bracket or plate needed, providing you with a lower total

installed cost. In addition, the PCB filter can be flow-

soldered with other components.

API’s PCB filter has built-in standoffs, which allow

for cleaning or coating beneath the filter, and the filter

is encapsulated for environmental protection.

Features

s

Provides EMI filtering to protect low power digital

circuits - helps equipment meet FCC and VDE

specifications

s

Mounts directly to printed circuit board with no bracket

or plate for lower applied costs - can be flow soldered

with other components

s

Encapsulated for environmental protection

s

Mounts on PCB to begin filtering at the source

of the problem

s

Built-in standoffs permit cleaning or coating

under the filter

Circuit Schematic

Typical Electrical Characteristics

Current . . . . . . . . . . . . . . . Max. 10A DC; 0.3A RF

Operating Voltage . . . . . . . . Max. 50 VDC, -25°C to +85°C

Capacitance . . . . . . . . . . . . 800 pF min.

Dissipation Factor . . . . . . . . 0.1 Max.

Dielectric

Withstanding Voltage . . . . . 125 VDC for 5 seconds

Insulation Resistance. . . . . . Min. 100 MegOhms at 100 VDC

Direct Current

Resistance. . . . . . . . . . . . . . 0.002 ohms Max.

Minimum No-Load

Insertion Loss . . . . . . . . . . . Per MIL-STD-220 at 25°C; PCB

mounted, 50 ohm strip line

3dB @ 8 MHz

10dB @ 25 MHz

15dB @ 50 MHZ

20dB @ 100 MHz-1GHz

.600

±

.030

(15.24

±

Ground

Lead

.300

±

.015

(7.62

±

.015

(0.38)

Ref.

.062

(1.57) Ref.

.062

(1.57)

Ref.

+++

.600

±

.010

(15.24

±

.300

±

.005

(7.62

±

.055

±

.002

(1.4

±

Dia.

.040

±

.002

(1.02

±

Dia.

.055

±

.002

(1.4

±

Dia.

Ground

Lead

.300

±

.010

(7.62

±

1.040

(26.42)

.032

(0.81)

Dia.

.520

(13.21)

Ref.

.040

(1.02)

Dia.

.240

±

.020

(6.10

±

.200

±

.010

(5.08

±

.125

±

.025

(3.18

±

StandardConfiguration PartNumber842448-1

.600

±

.030

(15.24

±

Ground

Lead

.300

±

.015

(7.62

±

.015

(0.38)

Ref.

.062

(1.57) Ref.

.062

(1.57)

Ref.

+++

.600

±

.010

(15.24

±

.300

±

.005

(7.62

±

.055

±

.002

(1.4

±

Dia.

.040

±

.002

(1.02

±

Dia.

.055

±

.002

(1.4

±

Dia.

Ground

Lead

.300

±

.010

(7.62

±

1.040

(26.42)

.032

(0.81)

Dia.

.520

(13.21)

Ref.

.040

(1.02)

Dia.

.240

±

.020

(6.10

±

.200

±

.010

(5.08

±

.125

±

.025

(3.18

±

RecommendedMountingConfiguration

PreformedtoRecommendedMountingConfiguration

PartNumber842448-2

Dimensions in inches

(mm)

Dimensions in inches

(mm)

.600

±

.030

(15.24

±

Ground

Lead

.300

±

.015

(7.62

±

.015

(0.38)

Ref.

.062

(1.57) Ref.

.062

(1.57)

Ref.

+

+

+

.600

±

.010

(15.24

±

.300

±

.005

(7.62

±

.055

±

.002

(1.4

±

Dia.

.040

±

.002

(1.02

±

Dia.

.055

±

.002

(1.4

±

Dia.

Ground

Lead

.300

±

.010

(7.62

±

1.040

(26.42)

.032

(0.81)

Dia.

.520

(13.21)

Ref.

.040

(1.02)

Dia.

.240

±

.020

(6.10

±

.200

±

.010

(5.08

±

.125

±

.025

(3.18

±

RecommendedPCB HoleLayout

Dimensions in inches

(mm)

Output

Input

Ground

Pi