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Type MK Precision Power Film Radial-Lead Resistors
Page 1 of 2
Non-Inductive with Expanded Resistance Range -- 1 ohm to 100 Megohms
Here are the precision radial lead resistors that provide high density packaging in circuit board applications. Available in three miniature rectangular package configurations with standard lead spacings, Type MK Precision Power RadialLead Film Resistors now cover the entire resistance range from 1 ohm to 100 Megohms. Constructed with Caddock's Micronox(R) resistance films fired onto a solid ceramic substrate, Type MK Precision Film Resistors combine all of these outstanding advantages: * 1% Resistance Tolerance is Standard - tolerances to 0.1% are available on special order. * Operating Temperature - from -55C to +175C. * Full Power Rating at +125C. * Temperature Coefficient is 50 ppm/C from 5 ohms to 5 Megohms and 80 ppm/C up to 100 Megohms - referenced to +25C with the R taken at -15C and +105C. * Extended Life Stability is Typically Better Than 0.1% per 1,000 Hours. * Caddock's Non-Inductive Performance - provides faster settling times and minimum distortion in all types of high frequency circuits. This combination of performance advantages in a small, standardized case can simplify many engineering and production problems: One size of Type MK resistor can replace many sizes of axial-lead resistors. This table of "RN" style axial-lead resistors shows the many sizes and power ratings that can be replaced with one of the three models of Type MK Precision Film Resistors, within the maximum allowable voltage ratings.
Comparison of Type MK and "RN" Ratings and Dimensions
Resistor Type MK120 or MK620
Power Rating 0.50 W Maximum Resistance 40 Megohms 100 Megohms 1 Megohm 5 Megohms 10 Megohms 20 Megohms Mounting Hole Spacing .150 (3.81) .200 (5.08) .400 (10.15) .500 (12.70) .625 (15.90) .875 (22.20) 1.000 (25.40)
RN50
One standard resistor configuration can simplify board layouts. With the exceptionally wide range of resistance values that are available in each model of Type MK Precision Film Resistors, circuits can now be designed for maximum packaging densities without the need for leaving extra space where resistor value changes can require larger resistors or nonuniform lead spacings. Standardization of resistor size can speed assembly procedures and reduce procurement costs. The standardization of resistor size can pay additional dividends by simplifying assembly procedures. The radial leads do not require additional bending prior to insertion, and the standard lead spacing can reduce the time required for assembly. The combination of higher power ratings and smaller size can also lower procurement costs. By reducing the wide variety of sizes and types of axial-lead resistors to a single, standardized resistor type, unit prices can be lowered and inventory problems simplified. For specific price and delivery information, contact our Sales Office.
Even the smallest Type MK resistor can replace all of these RN type resistors
MK132, MK132V, 0.75 W MK632, or MK632V RN50 RN55 RN60 RN65
0.05 W 0.10 W 0.125 W 0.25 W
RN55 RN60
RN65
RN70
0.50 W
40 Megohms
RN70
All outline drawings full size - dimensions in inches and (millimeters).
The largest Type MK - rated at .75 watt - requires less board space than even the .05 watt RN50. The smallest Type MK - rated at .50 watt - provides power dissipation equal to the RN70 resistor. The RN70 resistor requires a mounting hole spacing of 1 inch and a side-to-side spacing of .25 inch, resulting in a total mounting area of .25 square inch - 10 times the area required for a .50 Watt Type MK resistor!
Applications Engineering 17271 North Umpqua Hwy. Roseburg, Oregon 97470-9422 Phone: (541) 496-0700 Fax: (541) 496-0408
(c) 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_IL100.1004
Type MK Precision Power Film Radial-Lead Resistors
Page 2 of 2
Type MK Precision Film Resistors - Low and Standard Resistance Ranges
Model No.
MK120 MK132
MK132V
Wattage 0.50 0.75
0.75
Oper. Max. Temp. Dielect. Voltage Max. Strength 200 400
400
Resistance Low Min. Standard Min. Standard Max.
Dimensions
Encapsulation
Leadwire Tinned Copper
Tinned Copper
Tinned Copper
Comments
175C 175C
175C
300 400
400
1 1
1
5 5
5
2 Meg 5 Meg
5 Meg
Ref. Case "A" Dwg. Transfer Molded Ref. Case "B" Dwg. Transfer Molded
Ref. Case "C" Dwg. Transfer Molded
With Standoff
Resistance Tolerance: 1% (tolerances to 0.1% available on values of 30 ohms or higher). Overload/Overvoltage: 5 times rated power with applied voltage not to exceed 1.5 times maximum continuous operating voltage for 5 seconds, R (0.15 percent + 0.01 ohm) max. Operating Temp e r a t u r e : - 5 5 C t o +175C.
Temperature Coefficient:
Resistance Range Standard : 5 and above Low : 1 to 4.99 Temp. Coef. 50 ppm/C 200 ppm/C
Load Life: 1,000 hours at +125C at rated power, R (0.4 percent +0.01 ohm) max. Thermal Shock: Mil-Std-202, Method 107, Cond. B, R (0.2 percent +0.01 ohm) max. Moisture Resistance: Mil-Std-202, Method 106, R (0.5 percent + 0.01 ohm) max.
Temperature Coefficient referenced to +25C, R taken at -15C and +105C. Insulation Resistance: 10,000 Megohms, minimum.
Measurement Note: Resistance measurement on low resistance values shall be made at a point within 0.2 inch (5.08 mm) of the body.
Type MK Precision Film Resistors - Extended Resistance Range
Model No.
MK620 MK632
MK632V
Wattage 0.50 0.75
0.75
Oper. Max. Temp. Dielect. Voltage Max. Strength 200 400
400
TC ppm/ C 80 80
80
Resistance Min. Max.
Dimensions
Encapsulation
Leadwire Tinned Copper
Tinned Copper
Tinned Copper
Comments
175C 175C
175C
300 400
400
2.01 Meg 5.01 Meg
5.01 Meg
40 Meg 100 Meg
100 Meg
Ref. Case "A" Dwg. Transfer Molded Ref. Case "B" Dwg. Transfer Molded
Ref. Case "C" Dwg. Transfer Molded
With Standoff
Resistance Tolerance: 1% (consult factory for tighter tolerances). Overload/Overvoltage: 1.5 times max. voltage for 5 seconds, R 0.5% max. Operating Temperature: +175C. -55C to
Temperature Coefficient: See Table for TC value. TC referenced to +25C, R taken at -15C and +105C. Insulation Resistance: 10,000 Megohms, minimum.
Load Life: 1,000 hours at +125C at rated power, R 0.5% max. Thermal Shock: Mil-Std-202, Method 107, Cond. B, R 0.5% max. Moisture Resistance: Mil-Std-202, Method 106, R 0.5% max.
Model MK120 and MK620
.245 .010 (6.22 .26)
Case "A"
Case "B"
Model MK132 and MK632
.290 .010 (7.37 .26)
.095 .005 (2.41 .13)
MK632 100 MEG 1%
Case "C"
Model MK132V and MK632V
.290 .010 (7.37 .26)
MK632V 100 MEG 1%
.095 .005 (2.41 .13)
MK120 10.0 1%
.095 .005 (2.41 .13)
.030 .004 (.76 .10)
.250 .050 (6.35 1.27)
.290 .010 (7.37 .26)
+.125 1.50 -.000 +3.18) (38.10 -0.00) .150 .015 (3.81 .38) (CENTERED)
.245 .010 (6.22 .26) .025 .002 (.64 .05) DIA., LEADWIRE OFFSET .012 (.31) FROM CENTERLINE
+.125 1.50 -.000 +3.18) (38.10 -0.00)
.290 .010 (7.37 .26)
.200 .015 (5.08 .38) (CENTERED)
.025 .002 (.64 .05) DIA., LEADWIRE OFFSET .012 (.31) FROM CENTERLINE
.090 (2.29)
.200 .015 (5.08 .38) (CENTERED)
.025 .002 (.64 .05) DIA., LEADWIRE OFFSET .012 (.31) FROM CENTERLINE
RATED LOAD, %
Ordering Information:
Model Number:
MK132 - 500K - 1%
Derating Curve:
Tolerance
100 80 60 40 20 0 25 75 125 175 225
Resistor Value:
ALL DIMENSIONS IN INCHES AND (MILLIMETERS)
AMBIENT TEMPERATURE, C
Applications Engineering 17271 North Umpqua Hwy. Roseburg, Oregon 97470-9422 Phone: (541) 496-0700 Fax: (541) 496-0408
(c) 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_IL100.1004

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