Contact Technical Services at (800) 377-4384 with any questions.

Visit our website at www.solahd.com.

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1Power Protection and Conditioning

STF Series – Active Tracking® Filters

Low voltage/high frequency noise is caused by everyday

events such as turning on machinery, motors, or equipment.

Although noise is less dramatic than high voltage transients,

the long term effects of these frequent disturbances can

be as damaging. Filtering systems such as SolaHD Active

Tracking® Filters provide clean AC power by eliminating

lower voltage noise.

The SolaHD STF Series offers the original active tracking

technology to guard against commonly occurring but very

damaging, lower energy transients. Offering excellent noise

reduction, the lter continuously tracks the input AC power

line and responds instantly upon detecting extraneous high

frequency noise.

The STF Series eliminates low voltage/high frequency noise

via a low-pass or L-C lter. These lters are used for low

energy, high frequency noise reduction and consist of a

series of inductors, capacitors and resistors. STFs are load

dependent which means that the series inductors located on

each phase and neutral conductors are sized to handle the

maximum current draw on the line. These inductors together

with the capacitors and resistors form a circuit capable of

absorbing a large bandwidth of noise.

These devices are designed to meet UL 1283, and CSA

C22.2 No. 8 for Electromagnetic Interference Filters. STFs

attenuate or reduce the amplitude of noise to a minimum

of 40dB that occurs in a frequency range of 50 KHz to

50 MHz. They also provide the industry’s best IEEE Category

“A” protection, typically reducing normal mode transients

to +/- 5 volts.

Built to meet your unique requirements, these lters are

available in a multitude of voltage congurations. They are

hardwired and designed for years of trouble free operation

requiring little or no operator intervention after installation.

Active Tracking® Filters are one part of a total power

quality solution. They can be used alone or in conjunction

with other SolaHD products to solve more complex power

quality problems.

Applications

• Branch and Control Panels

• Factory Automation Installations

• Point of Use Industrial Service Equipment

• Dedicated Industrial and Machine Tools Equipment

• Telecommunications Equipment

Features

• Non degrading, series lter technology for

total durability

• High frequency noise lter, RLC low-pass lter

• Three phase applications up to 200 Amp

• Attenuates noise to 40 dB in frequency range

of 50 kHz to 50 MHz

• Operating temperature from -40°C to +45°C.

• Hardwired connection

• MTBF greater than 100,000 hours, Mil Std. 217F

• Ten year limited warranty

Certifications and Compliances

• Listed

- UL 1283

- CSA C22.2 No. 8

• RoHS Compliant

Related Products

• Power Conditioners

• Uninterruptible Power System

• Power Supplies

E311348

Contact Technical Services at (800) 377-4384 with any questions.

Visit our website at www.solahd.com.

27

1

Power Protection and Conditioning

Catalog

Number Amps Min. Wire Size

(AWG Suggested)

Fuse/Circuit Breaker Ampacity Case Dim.

in (mm) - A x B x C

Mounting Flange Dim.

in (mm) - D x E x F

Weight

lbs (kg)

Design

Style

Suggest Max

Three-Phase Models (120/208 Vac wye) *

STF0150-10Y 15.0 14 15A 18.75A 14.00 x 12.00 x 6.00

(355.6 x 304.8 x 152.4)

14.75 x 10.0 x 15.5

(374.7 x 254.0 x 393.7) 35.0 (19.90) 4

STF0300-10Y 30.0 10 30A 37.5A 14.00 x 12.00 x 6.00

(355.6 x 304.8 x 152.4)

14.75 x 10.0 x 15.5

(374.7 x 254.0 x 393.7) 35.0 (19.90) 4

STF0500-10Y 50.0 4 50A 62.5A 16.00 x 14.00 x 8.00

(406.4 x 355.6 x 203.2)

16.75 x 12.00 x 18.5

(425.4 x 304.8 x 469.9) 45.0 (20.41) 2

STF1000-10Y 100.0 2 100A 125A 20.00 x 16.00 x 10.00

(508 x 406.4 x 254)

21.25 x 10.0 x 22.5

(539.8 x 254.0 x 571.5) 65.0 (29.48) 2

STF2000-10Y 200.0 3/0 200A 250A 24.00 x 20.00 x 10.00

(609.6 x 508 x 254)

25.25 x 14.0 x 26.5

(641.4 x 355.6 x 673.1) 115.0 (52.16) 2

Three-Phase Models (240 V Delta) *

STF0150-24D 15.0 14 15A 18.75A 14.00 x 12.00 x 6.00

(355.6 x 304.8 x 152.4)

14.75 x 10.0 x 15.5

(374.7 x 254.0 x 393.7) 35.0 (19.90) 4

STF0300-24D 30.0 10 30A 37.5A 14.00 x 12.00 x 6.00

(355.6 x 304.8 x 152.4)

14.75 x 10.0 x 15.5

(374.7 x 254.0 x 393.7) 35.0 (19.90) 4

STF0500-24D 50.0 4 50A 62.5A 16.00 x 14.00 x 8.00

(406.4 x 355.6 x 203.2)

16.75 x 12.00 x 18.5

(425.4 x 304.8 x 469.9) 45.0 (20.41) 2

STF1000-24D 100.0 2 100A 125A 20.00 x 16.00 x 10.00

(508 x 406.4 x 254)

21.25 x 10.0 x 22.5

(539.8 x 254.0 x 571.5) 65.0 (29.48) 2

STF2000-24D 200.0 3/0 200A 250A 24.00 x 20.00 x 10.00

(609.6 x 508 x 254)

25.25 x 14.0 x 26.5

(641.4 x 355.6 x 673.1) 115.0 (52.16) 2

Three-Phase Models (277/480 V wye) *

STF0150-27Y 15.0 14 15A 18.75A 14.00 x 12.00 x 6.00

(355.6 x 304.8 x 152.4)

14.75 x 10.0 x 15.5

(374.7 x 254.0 x 393.7) 35.0 (19.90) 4

STF0300-27Y 30.0 10 30A 37.5A 14.00 x 12.00 x 6.00

(355.6 x 304.8 x 152.4)

14.75 x 10.0 x 15.5

(374.7 x 254.0 x 393.7) 35.0 (19.90) 4

STF0500-27Y 50.0 4 50A 62.5A 16.00 x 14.00 x 8.00

(406.4 x 355.6 x 203.2)

16.75 x 12.00 x 18.5

(425.4 x 304.8 x 469.9) 45.0 (20.41) 2

STF1000-27Y 100.0 2 100A 125A 20.00 x 16.00 x 10.00

(508 x 406.4 x 254)

21.25 x 10.0 x 22.5

(539.8 x 254.0 x 571.5) 65.0 (29.48) 2

STF2000-27Y 200.0 3/0 200A 250A 24.00 x 20.00 x 10.00

(609.6 x 508 x 254)

25.25 x 14.0 x 26.5

(641.4 x 355.6 x 673.1) 115.0 (52.16) 2

Three-Phase Models (480 V Delta) *

STF0150-48D 15.0 14 15A 18.75A 14.00 x 12.00 x 6.00

(355.6 x 304.8 x 152.4)

14.75 x 10.0 x 15.5

(374.6 x 254.0 x 393.7) 35.0 (19.90) 4

STF0300-48D 30.0 10 30A 37.5A 20.0 x 16.0 x 10.0

(508.0 x 406.4 x 254.0)

21.25 x 10.0 x 21.5

(539.75 x 254.0 x 546.1) 35.0 (19.90) 4

STF0500-48D 50.0 4 50A 62.5A 20.0 x 16.0 x 10.0

(508.0 x 406.4 x 254.0)

21.25 x 10.0 x 21.5

(539.75 x 254.0 x 546.1) 45.0 (20.41) 4

STF1000-48D 100.0 2 100A 125A 20.00 x 16.00 x 10.00

(508 x 406.4 x 254)

21.25 x 10.0 x 21.5

(539.8 x 254.0 x 546.1) 65.0 (29.48) 2

STF2000-48D 200.0 3/0 200A 250A 24.00 x 20.00 x 10.00

(609.6 x 508 x 254)

25.25 x 14.0 x 25.5

(641.4 x 355.6 x 647.7) 115.0 (52.16) 2

Selection Table

* Units are standard in NEMA 12 hinged enclosures.

Contact Technical Services at (800) 377-4384 with any questions.

Visit our website at www.solahd.com.

28

1Power Protection and Conditioning

Dimensional Drawings

F

Design Style 2

F

Design Style 4

STF Specifications

Description 120/208 Vac Models 277/480 Vac Models 480 Vac Models

Input Voltage 0-150/240 Vrms 0-320/520 Vrms 0-520 Vrms

Line Frequency 50/60 Hz

Transient Attenuation Response Time Instantaneous

Mean Time Between Failure (MTBF) > 100,000 Hours (Mil Std. 217F)

Packaging

Single phase < 30 Amps housed in black, high impact plastic case,

vacuum impregnated magnetics, epoxy encapsulated.

Single phase > 30 Amps, 480 Vac,

and three phase units housed in NEMA 12 enclosures.

Operating Temperature -40°C to +45°C; Derate Linearly to 60% at +70ºC

Load Surge Current Rating

10m sec: 5 x Nominal

1 sec : 3 x Nominal

5 sec: 2 x Nominal

Transient Reduction

Minimum of 40dB from 50 kHz through 50 MHz. Attenuation is greater than 50 dB to the surge withstand

capability Ringwave test IEEE C62.41, Category “A” (IEEE Category A Ringwave 6 kV, 200A, 100 kHz)

and “B” (IEEE Category B Ringwave 6 kV, 500 A, 100 kHz).

Warranty 10 year limited warranty