Datasheet > PF1220S-4

PF1220S-4

更新时间： 2024-11-28 21:54:39

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描述
PF1220 Series Precision Foil Power Resistors

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PF1220S-4 数据手册

PF1220 Series

Precision Foil Power Resistors

R I E D O N

TO-220 Housing

Rated Power 10 Watts

Resistances from 0.5 to 150K Ohms

High Stability Foil Resistance Elements

Resistance Tolerance to ± 0.02%

Operating Temperature -55°C to +155°C

Low Inductance ( <50nH ) and Thermal EMF

Riedon's TO-220 precision foil resistors satisfy demanding applications for high accuracy and

stable power resistors housed in the convenient TO-220 case. The PF1220s Nichrome foil resistance

element makes a wide resistance range available. It is bonded to an Al₂O₃substrate ensuring excellent

power dissipation and stability. Careful choice of materials and rugged construction ensure a reliable

component, and the very small tolerance and temperature coefficient provide high precision in difficult

applications.

SPECIFICATIONS

Resistance Range - 0.5 to 150K Ohms

( 100 Ohm Max. for 4-Terminal )

Free Air Power Rating - 1.5 Watts ( T

=70°C )

ambient

=25°C )

heatsink

Power Rating on Heatsink - 10 Watts ( T

Thermal Resistance - 10.8°C/W

Temperature Coefficient - ± 1ppm/°C ( +20°C to +60°C )

± 3ppm/°C ( -55°C to +125°C )

± 5ppm/°C ( -55°C to +155°C )

Stability - 0.01%

Resistance

0.5 to <10W

³10 to <50W

³50W

Tolerances Available (±%)

0.1, 0.25, 0.5, 1

0.05, 0.1, 0.25, 0.5, 1

0.02, 0.05, 0.1, 0.25, 0.5, 1

Thermal EMF - < 1mV/°C

Proof Voltage - 1KVDC

Maximum Current - 25 A

PF1220 Power Derating Curve

Operating Temperature - -55°C to +155°C

Resistance Element - Nichrome Foil

120

100

Substrate - Al O

2 3

Housing - Epoxy or PPS

Leads - Cu, Tinned, 2 or 4 pin

Ordering information:

25 40 55 70 85 100 115 130

Part Number - Resistance - Tolerance - TCR

Heatsink Temperature °C

Example: PF1220 0.5 Ohm 0.1% 5ppm

Riedon Inc. 300 Cypress Avenue

Alhambra CA 91801

www.riedon.com

(626) 284-9901 Fax: (626) 284-1704

REV 6/05

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