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210 Series0 pages
210 Series
Features
•t Terminals suitable for soldering
or bolt connection.
•t Adjustable lug supplied.
•t High wattage applications.
•t All-welded construction.
•t Rugged lead free vitreous enamel coating.
•t Flame resistant coating.
•t Thumb-screw-adjustable lug
available (Part No. 2160) for
1.125” core resistors.
•t RoHS compliant product available. Add “E” suffix to part number to specify.
Dividohm® Vitreous Enamel
Adjustable Power
D
C
L
Series
D12
D25
D50
D75
D100
D175
D225
D500
D1000
Wattage
12
25
50
75
100
175
225
500
1000
Ohms
1.0-10K
1.0-25K
1.0-100K
1.0-100K
1.0-100K
1.0-100K
1.0-100K
1.5-15K
3.0-27.7K
L
1.75 / 44.4
2.0 / 50.8
4.0 / 101.6
6.0 / 152.4
6.5 / 165.1
8.5 / 215.9
10.5 / 266.7
12.0 / 304.8
20.0 / 508.0
Dimensions (in. / mm)
t
D
Ct
0.313 / 7.94
0.188 / 4.76t
0.562 / 14.3
0.313 / 7.94t
0.562 / 14.3
0.313 / 7.94t
0.562 / 14.3
0.313 / 7.94t
0.750 / 19.1
0.50 / 12.7t
1.125 / 28.6
0.75 / 19.1t
1.125 / 28.6
0.75 / 19.1t
2.50 / 63.5
1.75 / 44.5t
2.50 / 63.5
1.75 / 44.5t
Core
Code
D
K
K
K
M
P
P
S
S
tStandard
VoltagetTerminal
565t
57
625t
40
1625t
40
2625t
40
2845t
40
3595t
46
4595t
46
4970t
45
8900t
45
Other sizes available; contact Ohmite. Also available in low cost Centohm or Silicone coating; contact Ohmite.
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 setting equipment 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.
ordering infO
Coating
Blank = Vitreous
C = Centohm
S = Silicone
Adjustability is 10% to 90% of full
value. Wattage is proportional to
this adjusted resistance value.
Material
Coating: Lead free vitreous
enamel.
Core: Tubular ceramic.
Core Diameter
See “Core and
Terminal Selection”
Terminal Type
See “Resistor Terminals
for Tubular Cores”
RoHS Compliant
Coating
Wattage
210 = Vitreous
410 = Silicone Ceramic
610 = Centohm
Ohms
1R0 = 1 Ω
250 = 250 Ω
1K0 = 1,000 Ω
25K = 25,000 Ω
25K5 = 25,500 Ω
See website for custom
core and terminal info
Tolerance
J = 5%
K = 10%
Ohms
R500 = 0.500 Ω
1R00 = 1 Ω
250R = 250 Ω
1K00 = 1,000 Ω
25K0 = 25,000 Ω
25K5 = 25,500 Ω
See page 36
for mounting hardware
Power limitations for high resistance 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
12W
4,500Ω necessary for
25W
9,000Ω ratings higher
50W
20,000Ω than 100W.
75W
35,000Ω
100W
50,000Ω
Made-to-order
RoHS Compliant
Series Wattage Tolerance
J = 5%
K = 10%
Sp e c i f i c a t i on s
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.
Electrical
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 approximately
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 rating (measured from terminal to
mounting bracket)
To calculate max. amps: use the
formula √P/R.
32
Ohmite Mfg. Co.
–––3K0E
–––4K0E
–––5K0E
–––6K0E
–––7K0E
–––7K5E
–––10KE
–––12KE
–––15KE
–––20KE
–––25KE
–––50KE
–––100KE
D75K––– 75
Ohmic value
D1000K–––1000
D500K––– 500
D225K––– 225
D100K––– 100
D175K––– 175
D75K––– 75
Ohmic value
= Standard values; check availability using the worldwide inventory
search at www.ohmite.com
3,000
4,000
5,000
6,000
7,000
7,500
10,000
12,000
15,000
20,000
25,000
50,000
100,000
D225K––– 225
D175K––– 175
D100K––– 100
D25K––– 25
D50K––– 50
–––150E
–––200E
–––250E
–––300E
–––400E
–––500E
–––750E
–––800E
–––1K0E
–––1K25E
–––1K5E
–––2K0E
–––2K5E
Part No.
Prefix
Suffix
D12K––– 12
150
200
250
300
400
500
750
800
1,000
1,250
1,500
2,000
2,500
D25K––– 25
D50K––– 50
D12K––– 12
D500K––– 500
D225K––– 225
D100K––– 100
D175K––– 175
50
75
D50K–––
D75K–––
25
D25K–––
12
D12K–––
Ohmic value
Part No.
Prefix
Suffix
Wattage
1.0 –––1R0E
2 –––2R0E
3 –––3R0E
4 –––4R0E
5 –––5R0E
7.5 –––7R5E
10 –––10RE
15 –––15RE
20 –––20RE
25 –––25RE
50 –––50RE
75 –––75RE
100 –––100E
Wattage
Part No.
Prefix
Suffix
D1000K–––1000
S ta n d a r d pa rt n u m b e r s f o r 2 1 0 S e r i e s
Wattage
50KΩ and 100KΩ resistance values involve very fine resistance wire and should not be
used in critical applications without burn-in and/or thermal cycling.
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
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