MP850-75.0-1% Caddock Electronics Inc, MP850-75.0-1% Datasheet - Page 2

• Manufacturer Part Number: MP850-75.0-1%
• Description: RES 75.0 OHM 50W 1% TO-220
• Manufacturer: Caddock Electronics Inc
• Series: Kool-Pak®MP800r

Specifications of MP850-75.0-1%

• Tolerance: ±1%
• Temperature Coefficient: -20/ +50ppm/°C
• Resistance (ohms): 75
• Power (watts): 50W
• Composition: Thick Film
• Features: Non-Inductive
• Size / Dimension: 0.410" L x 0.125" W (10.41mm x 3.18mm)
• Height: 0.640" (16.26mm)
• Lead Style: Through Hole
• Package / Case: TO-220-2
• Resistance In Ohms: 75.0
• Case: TO-220
• Resistance: 75 Ohms
• Power Rating: 50 Watts
• Termination Style: Radial
• Voltage Rating: 300 Volts
• Operating Temperature Range: - 55 C to + 150 C
• Dimensions: 16.26 mm W x 10.41 mm L x 3.18 mm H
• Lead Spacing: 5.08 mm
• Product: Thick Film Resistors Leaded
• Brand/series: Kool-Pak®, MP800 Series
• Lead Pitch: 0.200 in. +⁄- 0.010 in.
• Length: 0.640 in. +⁄- 0.010 in.
• Length, Lead: 0.500 in. +⁄- 0.050 in.
• Material, Element: Thick Film
• Package Type: TO-220
• Power, Rating: 50 W
• Resistance, Thermal, Junction To Case: 2.50 °C⁄W
• Special Features: Heat Sink
• Temperature, Operating, Maximum: 150 °C
• Temperature, Operating, Minimum: -55 °C
• Termination: Radial
• Thickness: 0.125 in. +⁄- 0.010 in.
• Voltage, Rating: 300 VDC
• Width: 0.410 in. +⁄- 0.010 in.
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: MP850-75.0-1%; MP850-75.0-F

© 2004 Caddock Electronics, Inc.
Applications Engineering
17271 North Umpqua Hwy.
Roseburg, Oregon 97470-9422
Phone: [phone]
Fax: [phone]
The thermal design should satisfy the following equation:
Case Temperature (T c ) + [Thermal Resistance (R θJC ) x power applied (Watts)] ≤ T
operating temperature range of the application.
Mounting Note: Mount on a smooth, clean and flat heat sink surface with a thermal interface material, such
as thermal grease. The entire exposed metal backface portion must be in thermal contact with the heat sink.
When screw mounting, use a compression washer which provides a mounting force of 150 to 300 pounds
(665 to 1330 N). This will provide sufficient pressure on the package over time and through large temperature
variations to maintain the maximum power dissipation capability. Mounting torque to avoid package damage
is 8 in-lbs (0.90 N-m). If a spring clip is used, a clip force of 8 to 30 pounds (35 to 130 N) is recommended to
be applied to the center of the package. The clip should be round or smooth in the contact area to avoid
concentrating the load on a small point of the plastic body of the package. Another mounting option is to use
a pressure bar method which can achieve a greater mounting force with a greater contact area.
For additional applications information regarding mounting and pulse handling see the Caddock
Applications Notes at caddock.com or contact Applications Engineering.
MP820
MP821
MP825
MP850
Model
No.
100
20
80
60
40
0
DIMENSIONS IN INCHES AND (MILLIMETERS)
Figure 2
TO-126 Style
MP825
Figure 1
Metal Tab
TO-220 Style
MP820 and MP821
Figure 3
TO-220 Style
MP850
A - MP825 / MP850 Max. Temperature, T
B - MP820 / MP821 Max. Temperature, T
TO-220 Style
TO-220 Style
TO-126 Style
TO-220 Style
25
Package
Derating Curve
CASE TEMPERATURE, °C
100
0.020 Ω
0.020 Ω
10.0 Ω
0.20 Ω
A
Min.
Resistance
.125 ±.004
(3.18 ±.10) DIA.
.094 ±.004
(2.39 ±.10) DIA .
Max
Max
(11.43 ±1.27)
CAD
.450 ±.050
B
(12.70 ±1.27)
(3.30 ±.76)
.500 ±.050
.080 ±.020
(2.03 ±.51)
.130 ±.030
150
= 150°C
= 175°C
(13.72 ±1.02)
(6.10 ±.26)
.240 ±.010
For Caddock Distributors listed by country see caddock.com/contact/dist.html
.540 ±.040
10.0 K
9.99 Ω
10.0 K
10.0 K
175
Max.
(10.16 ±.26)
(10.41 ±.26)
*
.320 ±.010
(8.12 ±.26)
All power and associated overload ratings are derated
based upon case temperature using the derating curve.
The case temperature is measured at the center of the
metal mounting surface, with the part properly mounted
and under electrical load. Without a heat sink, when in
free air at +25°C, the MP820, MP821, and MP850 are
rated for 2.25 watts, the MP825 is rated for 1.25 watts.
.410 ±.010
.400 ±.010
MP820
e-mail: [e-mail] • web: www.caddock.com
DOC
MP825
MP 850
0.10 Ω
50.0
Derating Using Case Temperature (T C ):
1%
C L
10.0
C L
1%
1%
+
C L
20 Watts
20 Watts
25 Watts
50 Watts
Rating
Power
(5.08 ±.26)
.200 ±.010
(5.08 ±.26)
.200 ±.010
(3.61 ±.08) DIA.
(2.97 ±.08)
.142 ±.003
.032 ± .004 DIA.
.115 ±.010
(2.92 ±.26)
.053 ± .007
(1.35 ± .18)
.030 ±.004
(.76 ± .10)
.200 ±.010
(5.08 ±.26)
.117 ±.003
(3.18 ±.26)
.053 ± .007
(1.35 ± .18)
.125 ±.010
.030 ±.004
(.76 ± .10)
(.81 ± .10)
*
*
*
*
Voltage
K
Power
Limited
Max.
300
300
300
MAX
Thermal Resistance
(14.73 ±.26)
(2.46 ±.26)
.023 ± .004
Film (
(11.18 ±.26)
(4.45 ±.38)
.097 ±.010
.110 ±.010
(2.79 ±.26)
(.58 ±.10)
.058 ±.007
(1.47 ±.18)
.580 ±.010
.440 ±.010
.175 ±.015
.125 ±.010
(3.18 ±.26)
(16.26 ±.26)
.025 ± .004
.070 ±.010
(1.78 ±.26)
.640 ±.010
(.64 ±.10)
considering the full
(1.32 ±.08)
7.50°C/Watt
7.50°C/Watt
5.00°C/Watt
2.50°C/Watt
.052 ±.003
J
) to Case (
R
θ
JC
C
)
Max. Temp.
175°C
175°C
150°C
150°C
T
Specifications:
Temperature Coefficient:
TC referenced to +25°C, ΔR taken at T
5.00 ohms and above, -20 to +50 ppm/°C
0.50 ohm to 4.99 ohms, -20 to +80 ppm/°C
0.050 ohm to 0.49 ohm, 0 to +200 ppm/°C
0.020 ohm to 0.049 ohm, 0 to +300 ppm/°C
Operating Temperature: -55°C to T
Inductance: 10nH typical in series when mea-
sured at a point 0.2 inches from the resistor body.
DWV: The dielectric strength rating of 1500 V
is based upon connections made between
terminals shorted and either the metal surface the
part is mounted to or a metal clip in contact with the
top surface of the part.
Insulation Resistance: 10,000 Megohms, min.
The resistor element is electrically isolated from
the mounting surface.
Load Stability: 2,000 hours at rated power.
ΔR ±(1.0 percent + 0.001 ohm) max. Power rating
dependent upon case temperature. See derating
curve.
Momentary Overload:
MP820, MP821, MP850: 2 times rated power with
applied voltage not to exceed 1.5 times maximum
continuous operating voltage for 5 seconds.
ΔR ±(0.3 percent + 0.001 ohm) max.
MP825: 1.5 times rated power with applied
voltage not to exceed 1.5 times maximum
continuous operating voltage for 5 seconds.
ΔR ±(0.3 percent + 0.001 ohm) max.
Moisture Resistance: Mil-Std-202, Method 106.
ΔR ±(0.5 percent + 0.001 ohm) max.
Thermal Shock: Mil-Std-202, Method 107, Cond. F.
ΔR ±(0.3 percent + 0.001 ohm) max.
Shock: 100G, Mil-Std-202, Method 213, Cond. I.
ΔR ±(0.2 percent + 0.001 ohm) max.
Vibration, High Frequency: Mil-Std-202, Method
204, Cond. D. ΔR ±(0.2 percent + 0.001 ohm)
max.
Terminal Strength:
Cond. A (Pull Test) 5 lbs. ΔR ±(0.2 percent
+ 0.001 ohm) max.
Terminal Material: Solderable
Measurement Note:
resistance measurement shall be made at a point
0.2 inch (5.08 mm) from the resistor body.
MAX
Dimensions
Figure 1
Figure 1
Figure 2
Figure 3
Riverside, California 92507-2364
Integral Metal Mounting Surface
Integral Metal Mounting Surface
Mil-Std-202, Method 211,
For these specifications,
Sales and Corporate Office
Metal Mounting Tab
Metal Mounting Tab
in Molded Package
in Molded Package
Phone: [phone]
Comments
1717 Chicago Avenue
Fax: [phone]
MAX
MAX
28_IL103.1004
rms
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