AT25LSD datasheet(26/60 Pages) KNOWLES

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HV PTFE Trimmers - A_HV Series

The only internally sealed High Voltage PTFE trimmer

Voltronics’ concentric ring PTFE dielectric trimmer capacitors are

designed for use at frequencies up to 1.5 GHz. They are ideal for

HIGH VOLTAGE applications. The solid internal PTFE dielectric

prevents ionization, a major advantage in space, high altitude and

high voltage applications. The unique internal O-ring seal makes

wave soldering and vapor degreasing possible without the need to

attach a separate cap.

Options

Non-Magnetic Option: All parts can be ordered as non-magnetic.

Add “NM” to the part number, i.e. NMAT25HV, NMKP10HV.

Extended Shaft Options:

Add “E” to the part number, i.e. AT10HVE.

Extended Plastic Shaft Options:

Add “EI” to the part number, i.e. EF10HVEI.

SD Option:

For applications requiring high reliability but lower voltage.

Part No.

Working Voltage

Withstanding Voltage

K_1SD

250

500

A or K_4SD

250

500

A_25SD

125

250

A_30*

250

500

A_40SD

250

500

A_55SD

125

250

Note: A_30 not available in high voltage configuration

U.S. Patent No. 5,229,911

A1 J 8 HV

Refer to page 14

OPTIONS

SERIES

CAPACITANCE

LEAD STYLE

General specifications

A_4HV

A_10 HV

A_15 HV

A_25 HV

Capacitance Range

1 to 4pF

1 to 10pF

1 to 16pF

1 to 23pF

DC Working

1000

750

DC Withstanding

2000

1500

Q (min) at 100MHz @ Max. C*

2000

Temperature Coefficent -

0±100ppm/˚C

-50±50 ppm/˚C

50±50 ppm/˚C

-50±50 ppm/˚C

Insulation Resistance @ 25˚C

106 MΩ

Seal

40 pounds/in2

Operating Temperature

-65˚C to +125˚C

Rotational Life

600 Turns

Tuning Torque

.05 to 5.0 in-oz

Shock

1,500g, 0.5 millisecs.

Vibration

50g at 10-2000 Hz

* Self-resonant frequency and Q are assured with no terminals on parts.

Other features include:



Ten or 29 linear turns



Internal stops



Extreme stability under shock & vibration



Screw head does not move in and out



Extended shaft option of metal or plastic



Long life with no dynamic tuning noise

General specifications

A_40HV

A_55HV

Capacitance Range

1.5 to 40pF

1.5 to 55pF

Q (min) at 100MHz @ Max. C*

2000

Q (min) at 75MHz @ Max. C*

780

Temperature Coefficent

0±100 ppm/˚C

Insulation Resistance @ 25˚C

106 MΩ

Seal

40 pounds/in2

Operating Temperature

-65˚C to +125˚C

Rotational Life

600 Turns

Tuning Torque

.05 to 5.0 in-oz

Shock

1,500g,

0.5 millisecs.

1,500g,

0.5 millisecs.

Vibration

50g at 10-2000 Hz

DC Working Voltage

1000

600

DC Withstanding Voltage

2000

1200

* Self-resonant frequency and Q are assured with no terminals on parts.

Extended metal shaft option: Add “E” to Part Number, i.e., AT40SDE

Extended Range

CONTACT ARMS FOR

SHORT RF CURRENT PATH

NON-ROTATING

MOVEABLE ELECTRODE

PERMANENT O-RING SEAL

PTFE SPACER

FOR POSITIVE GUIDANCE

a Knowles Precision Devices brand

1.55”

(39.4)

0.30”

(7.2)

0.50”

(12.7)

0.30”

(7.62)

AT25LSD 数据表(PDF) 26 Page - Knowles Electronics

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