Film Resistors. MP312 Datasheet

MP312 Resistors. Datasheet pdf. Equivalent


Caddock MP312
www.DataSheet4U.com
MP312 and MP330 Power Film Resistors
Chassis Mounted Precision Power Film Resistors with Center Screw Mounting
Type MP Chassis Mounted Power Film Resistors are made with Micronox®
resistance films fired onto a ceramic substrate which is thermally bonded to an
anodized aluminum base. By mounting this assembly directly to a metal
surface for improved heat transfer, the high power capabilities of these unique
resistors can provide increased packaging densities in many types of
electronic equipment.
The special performance features of these Type MP Chassis Mounted
Power Film Resistors include:
Two case sizes that provide 15 Watt and 30 Watt ratings.
Operation up to 275°C.
Single screw mounting to simplify attachment to the chassis or other heat
conducting surface.
A molded silicone case that encapsulates the resistor assembly to meet
stringent environmental specifications.
Extended life stability better than 0.01% per 1,000 hours has been
demonstrated through a 51/2 year, 50,000 hour program of continuous
load life testing.
Specifications:
Resistance Tolerance: ±1% (other tolerances
on special order).
Model
No.
MP 312
MP 330
Watt-
age
Max.
Voltage
Dielect.
Strength
High
Temp
TC ††
15 300
600 50
30 450 1,000 50
Resistance
Min. Max.
10 200 K
10 200 K
Dimensions in inches and (millimeters)
ABC
D
.600 (15.24) .188 (4.78) .185 (4.70) .092 (2.34)
.850 (21.59) .250 (6.35) .250 (6.35) .142 (3.61)
† MP312 15 Watt power rating based on chassis mounting on a
6" X 4" X 2" X .040" aluminum chassis, MP312 free air rating is
2.5 Watts at 25°C. MP330 30 Watt power rating based on
chassis mounting on a 7"X 5" X 2" X .040" aluminum chassis,
MP330 free air rating is 5.0 Watts at 25°C.
†† TC: 50 ppm/°C referenced to +25°C, ΔR
taken at +150°C and +275°C. (Low temp.
TC will be nominally -85 ppm/°C at -55°C.
See typical R-T curve.)
DERATING CURVE
100
80
60
40
20
0
25 75 125 175 225 275
AMBIENT TEMPERATURE, °C
TYPICAL R-T CURVE
2
1
0
-1
-55
0 50 100 150 200 250
TEMPERATURE, °C
Stacked Type MP Power Film Resistor Assemblies
Stacked Type MP assemblies - constructed by bolting
resistors between aluminum heat dissipating plates - provide a
simple means of further improving packaging densities.
These charts of power ratings versus air flow and chassis
area show the high power levels that can be achieved with
forced air cooling and with convection cooling in either vertical or
horizontal orientation.
POWER RATING
FOR STACKED MP312 POWER RESISTORS
18
Data is for 25°C air at 1 atmosphere,
ducted around resistors in the stack
16
with 2" x 2" x .04" aluminum plates
between resistors. To derive total
14
airflow required for stack, multiply
airflow/each resistor by the number
12 of resistors in the stack. Ducting is
10
not required when designing for
convection.
8 CONVECTION COOLING -
6 PLATES IN VERTICAL PLANE
4
2
CONVECTION COOLING -
PLATES IN HORIZONTAL PLANE
0 .2 .3 .4 .7 1 2 3 4 7 10 20 30
AIR FLOW (CFM)/EACH RESISTOR
POWER RATING
FOR CHASSIS MOUNTED SINGLE RESISTORS
30
25
20
15
10
5
01
Data is for 25°C still air at
1 atmosphere. Chassis material:
Aluminum, .040" thick.
MoMdoeldNeol .NMoP. M33P0312
2 4 6 10 20 40 60 100
CHASSIS AREA (SQ. IN.)
Insulation Resistance: 10,000 Megohms min.
Terminal Strength: Mil-Std-202, Method 211,
Cond. A (Pull Test) 5 lbs., and Cond. B (Bend
Test), ΔR 0.2% max. or 0.2 ohm max., whichever
is greater.
Thermal Shock: Mil-R-39009, ΔR 0.5% max. or
0.2 ohm max., whichever is greater.
Momentary Overload: 2 times rated power with
applied voltage not to exceed 1.5 times maximum
continuous operating voltage for 5 seconds,
ΔR 0.5% max. or 0.2 ohm max., whichever is
greater.
Moisture Resistance: Mil-Std-202, Method 106,
ΔR 0.5% max. or 0.2 ohm max., whichever is
greater.
Load Life: Mil-R-39009, 1,000 hours at rated
power, ΔR 1% max. or 0.2 ohm max., whichever
is greater. Power rating dependent upon chassis
area. See power rating graphs.
Shock, Medium Impact: 50G, Mil-Std-202,
Method 205, Cond. C.
Vibration, High Frequency: Mil-Std-202,
Method 204, Cond. B, ΔR 0.2% max. or 0.2 ohm
max., whichever is greater, through shock and
vibration sequence.
Terminals: Gold Plated Solder Lugs.
D - HOLE FOR MOUNTING
CADDOCK
100 1%
MP 312
15 W
C
40°
±3°
B AB
2
ALUMINUM BASE
DIMENSIONS IN INCHES AND (MILLIMETERS)
Applications Engineering
17271 North Umpqua Hwy.
Roseburg, Oregon 97470-9422
Phone: (541) 496-0700
Fax: (541) 496-0408
© 2004 Caddock Electronics, Inc.
CADDOCK
e-mail: caddock@caddock.com • web: www.caddock.com
For Caddock Distributors listed by country see caddock.com/contact/dist.html
Sales and Corporate Office
1717 Chicago Avenue
Riverside, California 92507-2364
Phone: (951) 788-1700
Fax: (951) 369-1151
28_IL123.1004


MP312 Datasheet
Recommendation MP312 Datasheet
Part MP312
Description (MP312 / MP330) Power Film Resistors
Feature MP312; www.DataSheet4U.com MP312 and MP330 Power Film Resistors Type MP Chassis Mounted Power Film Resisto.
Manufacture Caddock
Datasheet
Download MP312 Datasheet








@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)