Precision Resistors

RESISTORS INDEX
MF Series - Precision Resistors Metal Film
PGM Series - CDS Photo Resistors
RCR Series - Anti-Surge Resistors
CR Series - Carbon Resistors
RSS, RSN Series - Metal Oxide Resistors
KNP, KNPN Series - Wirewound Resistors
KNP-VE Series - Vitreous Enamel Coated Wirewound Resistors
BWW Series - High Precision Axial Moulded Wirewound Resistors
SQP, SQM, SQT, SQH, SQZ Series - Cement Resistors
FKU, FRU Series - Cement Resistors with Thermal Cut-offs
FRN, FKN, FSQ Series - Fusible Resistors
ZO, JW Series - Zero Ohm and Jumper Wire Resistors
CCR Series - Composition Resistors
RESISTORS - TECHNICAL STANDARDS AND USAGE METHODS
Marking System - Resistor Color Code
Forming and Dimensions - Resistors Forming and Assembly
Glossary - Terminology of Resistors
Precaution Usage - How to Apply and Store Resistors

Precision Resistors MF Series use nickel-chromium or a similar alloy deposited on a ceramic rod by a vacuum process of evaporation or sputtering. The final resistance value is (most commonly) defined by cutting an insulating path through the film along the length of the rod while keeping it in rotation. The technology is capable of supporting accurate characteristics over a broad resistance range. Types include axial through-hole and metal film fusible for special purpose.

General Specifications

STYLE	MIL STYLE	POWER RATING(W)		DIMENSION (mm)				MAX WORKING VOLTAGE		MAX OVERLOAD VOLTAGE
STYLE	MIL STYLE	RN	RNS	L	D	H	d ± 0.05	RN	RNS	RN	RNS
MF - 12	RN-50	1/8W	1/4W	3.2± 0.2	1.5 ± 0.2	26 ± 1.0	0.40~0.45	200	150	400	300
MF - 25	RN-55	1/4W	1/2W	6.0 ± 0.3	2.3 ± 0.3	26 ± 1.0	0.40~0.50	250	200	500	400
MF - 50	RN-60	1/2W	1W	9.0 ± 0.5	3.0 ± 0.5	26 ± 1.0	0.50~0.55	350	250	700	500
MF - 100	RN-65	1W	2W	11 ± 1.0	4.0 ± 0.5	35 ± 3.0	0.75~0.80	500	300	1000	600
MF - 200	RN-70	2W	3W	15 ± 1.0	5.0 ± 0.5	35 ± 3.0	0.75~0.80	500	350	1000	700

Resistance Range

STYLE	MIL STYLE	TOLERANCE	TC+15-25PPM	TC+50PPM	TC+100PPM	REMARK
MF-12	RN-50	±1% ±0.5% ±0.25%	100Ω-100KΩ 100Ω-100KΩ 100Ω-100KΩ	10Ω-1MΩ	10Ω-1MΩ	*Standard resistance is 10Ω-1MΩ, below or over this resistance on request.
MF-25	RN-55	±1% ±0.5% ±0.25% ±0.1%	51.1Ω-511KΩ 51.1Ω-511KΩ 100Ω-300KΩ 100Ω-300KΩ	10Ω-1MΩ	10Ω-1MΩ
MF-50	RN-60	±1% ±0.5% ±0.25% ±0.1%	51.1Ω-1KΩ 51.1Ω-1KΩ 100Ω-551KΩ 100Ω-330KΩ	10Ω-1MΩ	10Ω-1MΩ
MF-100	RN-65	±1% ±0.5% ±0.25% ±0.1%	51.1Ω-1KΩ 51.1Ω-1KΩ 100Ω-551KΩ 100Ω-330KΩ	10Ω-1MΩ	10Ω-1MΩ
MF-200	RN-70	±1% ±0.5% ±0.25% ±0.1%	51.1Ω-1KΩ 51.1Ω-1KΩ 100Ω-551KΩ 100Ω-330KΩ	10Ω-1MΩ	10Ω-1MΩ

Electrical Performance

REQUIREMENTS	CHARACTERISTICS	JIS C 5202	MIL-R-10509F
Operating Temp.Range	-55°C ~ 155°C
Temp Coefficient (°C )	±25 ±50 ±100	5.2	4.6.12
Short Time Overload	±(0.5%%+0.05Ω)	5.5 A	4.6.6
Dielectric Withstanding V	±(0.5%+0.05Ω)	5.7 A	4.6.8
Effect of Soldering	±(0.5%+0.05Ω)	6.4 350°C 3 sec	4.6.10
Temperature Cycling	±(0.5%+0.05Ω)	7.4	4.6.4
Low Temp Operation	±(0.5%+0.05Ω)		4.6.5
Terminal Strength	±(0.5%+0.05Ω)	6.1	4.6.7
Moisture Resistance	±(1%+0.05Ω)	7.9 1,000hr	MIL R-22684 4.6.10
Load Life	±(1%+0.05Ω)	7.10 1,000hr	4.6.13
Storage	±(0.2%+0.05Ω)	Shelved one year in a room of normal temperature and humidity

How to Order

MF-25	1/4W	100R	J	TB/P

Product Type	Rated Power	Resistance Value(Ω)	Resistance Tolerance	Packaging

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