D12K350 datasheet, PDF - EEWORLD Datasheet

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D12K350: DescriptionWirewound Resistors - Chassis Mount 12watt 350ohm 10% Tubular Ceramic; CategoryPassive components; File Size213KB，2 Pages; ManufacturerOhmite; Websitehttps://www.ohmite.com

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D12K350 Overview

Wirewound Resistors - Chassis Mount 12watt 350ohm 10% Tubular Ceramic

D12K350 Parametric

Parameter Name	Attribute value
Product Attribute	Attribute Value
Manufacturer	Ohmite
Product Category	Wirewound Resistors - Chassis Mount
RoHS	No -; RoHS Version Available
Resistance	350 Ohms
Power Rating	12 W
Tolerance	10 %
Temperature Coefficient	260 PPM / C
Voltage Rating	565 V
Operating Temperature Range	+ 25 C to + 350 C
Length	44.4 mm
Packaging	Bulk
Diameter	7.94 mm
Features	Adjustable/Variable Resistors
Technology	Wirewound
Termination Style	Solder Lug
Mounting Style	Chassis Mount
Maximum Operating Temperature	+ 350 C
Minimum Operating Temperature	+ 25 C
Factory Pack Quantity	1

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210 Series

Dividohm® Vitreous Enamel

Adjustable Power

F e at u r e S

• Terminals suitable for soldering or bolt connection.

• Adjustable lug supplied

• High wattage applications

• All-welded construction

• Rugged lead free vitreous enamel coating.

• Flame resistant coating

• Additional adjustable lugs available

• RoHS compliant product available. Add “E” suffix to

part number to specify

Series

D12

D25

D50

D75

D100

D175

D225

D500

D1000

Wattage

100

175

225

500

1000

Ohms

1.0-10K

1.0-25K

1.0-100K

1.5-15K

3.0-27.7K

Choose Ohmite’s 210 Type adjustable resistors for

applications requiring settings at different resistance

values. These wirewound resistors are equipped with

an adjustable lug, making them ideal for adjusting

circuits, obtaining odd resistance values and set-

ting equip ment to meet various line voltages. 210

Type resistors feature a hollow core to permit secure

fastening with spring-type clips or thru bolts with

washers. They also offer the durability of lead free

vitreous enamel coating and all-welded construction.

Mounting brackets not included with resistors.

Core Code

Voltage

565

625

1625

2625

2845

3595

4595

4970

8900

Standard Terminal

S e r i e S S P e c i F i c at i O N S

Other sizes available; contact Ohmite. Also available in low cost Centohm or Silicone coating; contact Ohmite.

characteriSticS

Adjustability

10% to 90% of full value. Wattage is proportional to this adjusted

resistance value.

Coating

Lead free vitreous enamel. Large models (500 watts and up) are

supplied in Silicone Ceramic. Also available in low-cost Centohm

coating; Consult factory.

Core

Tubular ceramic.

Terminals

Solder coated radial lug. RoHS solder composition is 96% Sn,

3.5% Ag, 0.5% Cu

Adjustable

Nickel plated steel. (Screwdriver type adjustable lug supplied

terminal

standard. Other types, including silver contact units, available.)

Derating

Linearly from 100% @ +25°C to 0% @ +350°C.

Tolerance

±10% (K)

Power limitations for high resis-

tance values:

When resistance

exceeds the resistance values listed

below, derate the Power Rating by

25% to improve reliability:

Power Resistance

No power

rating value

derating neces-

sary for ratings

12W

4,500Ω

higher than

25W

9,000Ω

100W.

50W

20,000Ω

75W

35,000Ω

100W 50,000Ω

Power rating

Based on 25°C free air rating. The stated wattage rating applies

only when the entire resistance is in the circuit. Setting the lug at

an intermediate point reduces the wattage rating by approximately

the same proportion. Example: If the lug is set at half resistance,

the wattage is reduced by approx. one-half.

Overload

10 times rated wattage for 5 seconds.

Temperature

±260 ppm/°C

coefficient

Dielectric

1000 VAC: 12 to 100 watt rating. 3000 VAC: 175 and 225 watt rat-

withstanding

ing (measured from terminal to mounting bracket)

voltage

Max. amps

To calculate, use the formula √P/R.

1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com

109

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