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® 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 -55°C to +175°C. • Full Power Rating at +125°C. • Temperature Coefficient is ≤ 50 ppm/°C from 5 ohms to 5 Megohms and ≤ 80 ppm/°C up to 100 Megohms - referenced to +25°C with the ΔR taken at -15°C and +105°C. • 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 Power Rating Maximum Resistance Mounting Hole Spacing MK120 or MK620 0.50 W 40 Megohms .150 (3.81) MK132, MK132V, 0.75 W MK632, or MK632V 100 Megohms .200 (5.08) RN50 0.05 W 1 Megohm .400 (10.15) RN55 0.10 W 5 Megohms .500 (12.70) RN60 0.125 W 10 Megohms .625 (15.90) RN65 0.25 W 20 Megohms .875 (22.20) RN70 0.50 W 40 Megohms 1.000 (25.40) Even the smallest Type MK resistor can replace all of these RN type resistors 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. RN50 RN55 RN60 RN65 RN70 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. 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 © 2004 Caddock Electronics, Inc. CADDOCK e-mail: [email protected] • 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 Resistance Oper. Max. Temp. Dielect. Voltage Max. Strength Model No. Wattage MK 120 0.50 200 175°C MK 132 0.75 400 175°C MK 132V 0.75 400 175°C Dimensions Comments Leadwire Encapsulation Low Min. Standard Min. Standard Max. 300 1Ω 5Ω 2 Meg Ref. Case "A" Dwg. Transfer Molded 400 1Ω 5Ω 5 Meg Ref. Case "B" Dwg. Transfer Molded Tinned Copper 400 1Ω 5Ω 5 Meg Ref. Case "C" Dwg. Transfer Molded Tinned Copper Resistance Tolerance: ±1% (tolerances to ±0.1% available on values of 30 ohms or higher). Temperature Coefficient: Resistance Range Temp. Coef. Overload/Overvoltage: 5 times rated power with applied voltage not to exceed 1.5 times maximum continuous operating voltage for 5 seconds, ΔR ±(0.15 percent + 0.01 ohm) max. Standard : 5 Ω and above 50 ppm/°C Low : 1 Ω to 4.99 Ω 200 ppm/°C Temperature Coefficient referenced to +25°C, ΔR taken at -15°C and +105°C. Operating Temp e r a t u r e : - 5 5 ° C t o +175°C. Insulation Resistance: 10,000 Megohms, minimum. Tinned Copper With Standoff Load Life: 1,000 hours at +125°C at rated power, ΔR ±(0.4 percent +0.01 ohm) max. Thermal Shock: Mil-Std-202, Method 107, Cond. B, ΔR ±(0.2 percent +0.01 ohm) max. Moisture Resistance: Mil-Std-202, Method 106, ΔR ±(0.5 percent + 0.01 ohm) max. 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. Wattage Oper. Max. Temp. Dielect. Voltage Max. Strength Min. Max. Dimensions Comments Leadwire Encapsulation MK 620 0.50 200 175°C 300 80 2.01 Meg 40 Meg Ref. Case "A" Dwg. Transfer Molded Tinned Copper MK 632 0.75 400 175°C 400 80 5.01 Meg 100 Meg Ref. Case "B" Dwg. Transfer Molded Tinned Copper MK 632V 0.75 400 175°C 400 80 5.01 Meg 100 Meg Ref. Case "C" Dwg. Transfer Molded Tinned Copper Resistance Tolerance: ±1% (consult factory for tighter tolerances). Overload/Overvoltage: 1.5 times max. voltage for 5 seconds, ΔR 0.5% max. Operating Temperature: +175°C. -55°C to .095 ±.005 (2.41 ±.13) MK120 10.0 1% .150 ±.015 (3.81 ±.38) (CENTERED) Thermal Shock: Mil-Std-202, Method 107, Cond. B, ΔR 0.5% max. Moisture Resistance: Mil-Std-202, Method 106, ΔR 0.5% max. Case "C" Model MK132 and MK632 .290 ±.010 (7.37 ±.26) Model MK132V and MK632V .095 ±.005 (2.41 ±.13) .200 ±.015 (5.08 ±.38) (CENTERED) MK132 - 500K - 1% .290 ±.010 (7.37 ±.26) .025 ±.002 (.64 ±.05) DIA., LEADWIRE OFFSET .012 (.31) FROM CENTERLINE Derating Curve: Tolerance © 2004 Caddock Electronics, Inc. .025 ±.002 (.64 ±.05) DIA., LEADWIRE OFFSET .012 (.31) FROM CENTERLINE .200 ±.015 (5.08 ±.38) (CENTERED) 100 80 60 40 20 0 ALL DIMENSIONS IN INCHES AND (MILLIMETERS) CADDOCK .290 ±.010 (7.37 ±.26) .250 ±.050 (6.35 ±1.27) .090 (2.29) Resistor Value: Applications Engineering 17271 North Umpqua Hwy. Roseburg, Oregon 97470-9422 Phone: (541) 496-0700 Fax: (541) 496-0408 .030 ±.004 (.76 ± .10) MK632V 100 MEG 1% +.125 1.50 -.000 +3.18) (38.10 -0.00) .025 ±.002 (.64 ±.05) DIA., LEADWIRE OFFSET .012 (.31) FROM CENTERLINE .095 ±.005 (2.41 ±.13) .290 ±.010 (7.37 ±.26) MK632 100 MEG 1% .245 ±.010 (6.22 ±.26) Ordering Information: Model Number: Insulation Resistance: 10,000 Megohms, minimum. With Standoff Load Life: 1,000 hours at +125°C at rated power, ΔR 0.5% max. RATED LOAD, % Model MK120 and MK620 +.125 1.50 -.000 +3.18) (38.10 -0.00) Temperature Coefficient: See Table for TC value. TC referenced to +25°C, ΔR taken at -15°C and +105°C. Case "B" Case "A" .245 ±.010 (6.22 ±.26) Resistance TC ppm/ °C e-mail: [email protected] • web: www.caddock.com For Caddock Distributors listed by country see caddock.com/contact/dist.html 25 75 125 175 225 AMBIENT TEMPERATURE, °C Sales and Corporate Office 1717 Chicago Avenue Riverside, California 92507-2364 Phone: (951) 788-1700 Fax: (951) 369-1151 28_IL100.1004