D25K100E Datasheet, PDF (1/1 Pages) Ohmite Mfg. Co. – Dividohm® Vitreous Enamel Adjustable Power

210 Series
Dividohm^® Vitreous Enamel
Adjustable Power
D
C
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.
Series
D12
D25
D50
D75
D100
D175
D225
Wattage
12
25
50
75
100
175
225
Ohms
1.0-10K
1.0-25K
1.0-100K
1.0-100K
1.0-100K
1.0-100K
1.0-100K
Dimensions (in. / mm)
L
D
C
1.75 / 44.4 0.313 / 7.94
0.188 / 4.76
2.0 / 50.8 0.562 / 14.3
0.313 / 7.94
4.0 / 101.6 0.562 / 14.3
0.313 / 7.94
6.0 / 152.4 0.562 / 14.3
0.313 / 7.94
6.5 / 165.1 0.750 / 19.1
0.50 / 12.7
8.5 / 215.9 1.125 / 28.6
0.75 / 19.1
10.5 / 266.7 1.125 / 28.6
0.75 / 19.1
Core
Code
D
K
K
K
M
P
P
Standard
Voltage Terminal
565
57
625
40
1625
40
2625
40
2845
40
3595
46
4595
46
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
D500
500
1.5-15K 12.0 / 304.8
2.50 / 63.5
1.75 / 44.5
S
4970
45
D1000 1000 3.0-27.7K 20.0 / 508.0
2.50 / 63.5
1.75 / 44.5
S
8900
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 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.
Sp e c i f i c a t i on s
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.
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
ordering infO
Coating
Blank = Vitreous
C = Centohm
RoHS Compliant
S = Silicone
��������
Series Wattage Tolerance
J = 5%
K = 10%
Ohms
1R0 = 1 Ω
250 = 250 Ω
1K0 = 1,000 Ω
25K = 25,000 Ω
25K5 = 25,500 Ω
Made-to-order
Core Diameter Terminal Type
See “Core and See “Resistor Terminals
Terminal Selection” for Tubular Cores”
RoHS Compliant
��������������
Coating
Wattage
210 = Vitreous
410 = Silicone Ceramic
610 = Centohm
See website for custom
core and terminal info
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%
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
rating
12W
25W
50W
75W
100W
Resistance No power
value derating
4,500Ω necessary for
9,000Ω ratings higher
20,000Ω than 100W.
35,000Ω
50,000Ω
Wattage
Standard part numbers for 210 Series
Wattage
Wattage
Part No.
Prefix 
Suffix
Part No.
Prefix 
Suffix
Part No.
Prefix 
Suffix
1.0 –––1R0E       
150 –––150E   
3,000 –––3K0E   
2 –––2R0E       
200 –––200E    
4,000 –––4K0E 
3 –––3R0E

250 –––250E       
5,000 –––5K0E   

4 –––4R0E


300 –––300E    
6,000 –––6K0E

5 –––5R0E         
400 –––400E    
7,000 –––7K0E  
7.5 –––7R5E  
500 –––500E          7,500 –––7K5E   
10 –––10RE       
750 –––750E    
10,000 –––10KE      
15 –––15RE  

800 –––800E

12,000 –––12KE
20 –––20RE  
1,000 –––1K0E          15,000 –––15KE

25 –––25RE       
1,250 –––1K25E  
20,000 –––20KE

50 –––50RE       
1,500 –––1K5E       
25,000 –––25KE

75 –––75RE   
2,000 –––2K0E    
50,000 –––50KE


100 –––100E       
2,500 –––2K5E   

100,000 –––100KE


 = Standard values; check availability using the worldwide inventory 50KΩ and 100KΩ resistance values involve very fine resistance wire and should not be
search at www.ohmite.com
used in critical applications without burn-in and/or thermal cycling.
32 Ohmite Mfg. Co.
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