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D225K25R

CategoryPassive components    The resistor   
File Size213KB,2 Pages
ManufacturerOhmite
Websitehttps://www.ohmite.com
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D225K25R Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
MakerOhmite
Reach Compliance Codecompliant
ECCN codeEAR99
Actuator typeSLIDE
structureAll-Welded
gang number1
JESD-609 codee0
Manufacturer's serial number210
Installation featuresPANEL MOUNT
Number of terminals3
Maximum operating temperature350 °C
Package diameter28.6 mm
Package length266.7 mm
Package shapeTUBULAR PACKAGE
Package formRadial
Rated power dissipation(P)225 W
Rated temperature25 °C
resistance25 Ω
resistance lawLINEAR
Resistor typePOTENTIOMETER
series210
surface mountNO
technologyWIRE WOUND
Temperature Coefficient-260,260 ppm/°C
Terminal surfaceTin/Lead (Sn/Pb)
Terminal shapeLUG
Tolerance10%
Operating Voltage4595 V
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
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
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
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
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 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.
Temperature
±260 ppm/°C
coefficient
Overload
10 times rated wattage for 5 seconds.
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
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
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