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109

Series

Wattage

Ohms

Core Code

Voltage

Standard Terminal

D12

12

1.0-10K

D

565

57

D25

25

1.0-25K

K

625

40

D50

50

1.0-100K

K

1625

40

D75

75

1.0-100K

K

2625

40

D100

100

1.0-100K

M

2845

40

D175

175

1.0-100K

P

3595

46

D225

225

1.0-100K

P

4595

46

D500

500

1.5-15K

S

4970

45

D1000

1000

3.0-27.7K

S

8900

45

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

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

terminal

Nickel plated steel. (Screwdriver type adjustable lug supplied

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

Derating

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

Tolerance

±10% (K)

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

coefficient

±260 ppm/°C

Dielectric

withstanding

voltage

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

ing (measured from terminal to mounting bracket)

Max. amps

To calculate, use the formula √P/R.

210 Series

Dividohm® Vitreous Enamel

Adjustable Power

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.

Fea ture 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

characteri S tic S

S erie S SP eci F icati ONS

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

rating value

12W

4,500Ω

25W

9,000Ω

50W

20,000Ω

75W

35,000Ω

100W 50,000Ω

No power

derating neces-

sary for ratings

higher than

100W.