210 Series
D
L
Features
• Terminals suitable for soldering
or bolt connection.
• Adjustable lug supplied.
• High wattage applications.
• All-welded construction.
• Rugged lead free vitreous enam-
el coating.
• Flame resistant coating.
• Thumb-screw-adjustable lug
available (Part No. 2160) for
1.125” core resistors.
• RoHS compliant product avail-
able. Add “E” suffix to part num-
ber to specify.
Dimensions (in. /
mm)
D
C
0.313 /
7.94
0.188 /
4.76
0.562 /
14.3
0.313 /
7.94
0.562 /
14.3
0.313 /
7.94
0.562 /
14.3
0.313 /
7.94
0.750 /
19.1
0.50 /
12.7
1.125 /
28.6
0.75 /
19.1
1.125 /
28.6
0.75 /
19.1
2.50 /
63.5
1.75 /
44.5
2.50 /
63.5
1.75 /
44.5
Core
Code
D
K
K
K
M
P
P
S
S
Voltage
565
625
1625
2625
2845
3595
4595
4970
8900
standard
terminal
57
40
40
40
40
46
46
45
45
Dividohm
®
Vitreous enamel
adjustable Power
C
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
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 wire-
wound 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
RoHS Compliant
sPeCiFiCatiONs
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.
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 con-
tact 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 watt-
age rating applies only when the
entire resistance is in the circuit.
Setting the lug at an intermediate
point reduces the wattage rat-
ing by approximately the same
proportion. Example: If the lug is
set at half resistance, the watt-
age 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 rat-
ing (measured from terminal to
mounting bracket)
To calculate max. amps:
use the
formula
√P/R.
See page 36
for mounting hardware
made-to-order
Core Diameter
See “Core and
Terminal Selection”
Terminal Type
See “Resistor Terminals
for Tubular Cores”
RoHS Compliant
½½½½½½½½
Ohms
1R0 = 1
Ω
250 = 250
Ω
1K0 = 1,000
Ω
25K = 25,000
Ω
25K5 = 25,500
Ω
½½½½½½½½½½½½½½
Coating
Wattage
210 = Vitreous
410 = Silicone Ceramic
610 = Centohm
Ohms
R500 = 0.500
Ω
1R00 = 1
Ω
250R = 250
Ω
1K00 = 1,000
Ω
25K0 = 25,000
Ω
25K5 = 25,500
Ω
Tolerance
J = 5%
K = 10%
Series Wattage Tolerance
J = 5%
K = 10%
See website for custom
core and terminal info
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
12W
4,500Ω necessary for
25W
9,000Ω ratings higher
50W
20,000Ω than 100W.
75W
35,000Ω
100W
50,000Ω
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
D1000K–––1000
D1000K–––1000
Wattage
D100K–––
100
D225K–––
225
D175K–––
175
D500K–––
500
12
25
50
75
Ohmic value
Part No.
Prefix
Suffix
Wattage
D100K–––
100
D175K–––
175
D500K–––
500
D225K–––
225
D12K–––
12
D25K–––
25
D50K–––
50
D75K–––
75
Ohmic value
Part No.
Prefix
Suffix
–––150E
–––200E
–––250E
–––300E
–––400E
–––500E
–––750E
–––800E
–––1K0E
–––1K25E
–––1K5E
–––2K0E
–––2K5E
Wattage
D100K–––
100
Ohmic value
Part No.
Prefix
Suffix
–––3K0E
–––4K0E
–––5K0E
–––6K0E
–––7K0E
–––7K5E
–––10KE
–––12KE
–––15KE
–––20KE
–––25KE
–––50KE
–––100KE
D175K–––
175
D12K–––
12
D50K–––
50
D225K–––
225
D25K–––
25
D75K–––
75
D12K–––
D25K–––
D50K–––
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
D75K–––
150
200
250
300
400
500
750
800
1,000
1,250
1,500
2,000
2,500
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
= Standard values; check availability using the worldwide inventory
search at www.ohmite.com
32
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.
Ohmite Mfg. Co.
1600 Golf Rd., Rolling Meadows, IL 60008 • 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
