Metal Film Fixed Resistors UNI ROYAL MFR0W4F3300A50 Lead Free with Stable Electrical Characteristics

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Product Description

UNIROYAL ELECTRONICS INDUSTRY CO., LTD. - LEAD-FREE METAL FILM FIXED RESISTORS (MFR SERIES)

This document specifies the Lead-Free Metal Film Fixed Resistors manufactured by UNIOHM. These resistors are designed for various electronic applications requiring precise resistance values and stable performance.

Product Attributes

Brand: UNIROYAL ELECTRONICS INDUSTRY CO., LTD. (UNIOHM)
Origin: CHINA
Product Name: LEAD-FREE METAL FILM FIXED RESISTORS
Part Name: MFR SERIES
Certifications: Implied compliance with JIS C 0802 for marking.

Technical Specifications

Type	Power Rating	Dimensions (mm) D x L x d0.05	H3	Max Working Voltage	Max Overload Voltage	Dielectric Withstanding Voltage	Tolerance	Resistance Range
MF 1/8W	1/8W	1.90.3 x 3.30.3 x 0.45	28	200V	400V	400V	1%2%	10~1M
MF 1/8W	1/8W	1.90.3 x 3.30.3 x 0.45	28	200V	400V	400V	5%	1~1M
MF 1/4W	1/4W	2.20.3 x 6.51.0 x 0.54	28	250V	500V	500V	1%2%	10~1M
MF 1/4W	1/4W	2.20.3 x 6.51.0 x 0.54	28	250V	500V	500V	5%	1~1M
MF 1/2W	1/2W	3.00.6 x 9.51.0 x 0.54	28	350V	700V	700V	1%2%	10~1M
MF 1/2W	1/2W	3.00.6 x 9.51.0 x 0.54	28	350V	700V	700V	5%	1~1M
MF 1W	1W	4.50.6 x 11.51.0 x 0.65	28	500V	1000V	1000V	1%2%	51.1~1M
MF 1W	1W	4.50.6 x 11.51.0 x 0.65	28	500V	1000V	1000V	5%	1~1M
MF 2W	2W	5.00.6 x 15.51.0 x 0.70	28	500V	1000V	1000V	1%2%	51.1~1M
MF 2W	2W	5.00.6 x 15.51.0 x 0.70	28	500V	1000V	1000V	5%	1~1M
MF 3W	3W	6.00.6 x 17.51.0 x 0.75	28	500V	1000V	1000V	1%2%	51.1~1M
MF 3W	3W	6.00.6 x 17.51.0 x 0.75	28	500V	1000V	1000V	5%	1~1M
MF 1/4WS	1/4WS	1.90.5 x 3.30.3 x 0.45	28	200V	400V	200V	1%2%	10~1M
MF 1/4WS	1/4WS	1.90.5 x 3.30.3 x 0.45	28	200V	400V	200V	5%	1~1M
MF 0.4WSS	0.4WSS	1.90.5 x 3.30.3 x 0.45	28	200V	400V	200V	1%2%	10~1M
MF 0.4WSS	0.4WSS	1.90.5 x 3.30.3 x 0.45	28	200V	400V	200V	5%	1~1M
MF 1/2WSS	1/2WSS	2.20.5 x 6.50.5 x 0.54	28	250V	500V	250V	1%	10~1M
MF 1/2WSS	1/2WSS	2.20.5 x 6.50.5 x 0.54	28	250V	500V	250V	2%5%	1~1M
MF 1/2WS	1/2WS	2.70.5 x 9.01.0 x 0.54	28	350V	700V	700V	1%2%	10~1M
MF 1/2WS	1/2WS	2.70.5 x 9.01.0 x 0.54	28	350V	700V	700V	5%	1~1M
MF 0.6WS	0.6WS	2.20.5 x 6.51.0 x 0.54	28	250V	500V	250V	1%	10~1M
MF 0.6WS	0.6WS	2.20.5 x 6.51.0 x 0.54	28	250V	500V	250V	2%5%	1~1M
MF 1WS	1WS	3.50.6 x 9.51.0 x 0.60	28	350V	700V	350V	1%2%5%	10~1M
MF 2WS	2WS	4.00.6 x 11.51.0 x 0.65	28	500V	1000V	350V	1%2%5%	10~1M
MF 3WS	3WS	5.00.6 x 15.51.0 x 0.70	28	500V	1000V	350V	1%2%5%	10~1M

Specification Details

Item	Limits	Test Method
Temperature Coefficient	0.1% 15 PPM/Max.	4.8 Natural resistance changes per temp. Degree centigrade R2 R1 R1(T2 T1) 106(PPM/) R1: resistance value at room temp. (T1) R2: resistance value at room temp. +100 (Tt2) Test pattern: room temp. (T1), room temp. +100(T2)
Temperature Coefficient	0.25% 25 PPM/Max.
Temperature Coefficient	0.5% 50PPM/Max.
Temperature Coefficient	1% 50PPM/Max.
Temperature Coefficient	2% 100PPM/Max.
Temperature Coefficient	5% 200PPM/Max.
Short-time overload	Resistance change rate is: (0.5%+0.05)Max. With no evidence of mechanical damage.	4.13 Permanent resistance change after the application of a potential of 2.5 times RCWV for 5 seconds.
Dielectric withstanding voltage	No evidence of flashover mechanical damage, arcing or insulation break down.	4.7 Resistors shall be clamped in the trough of a 90metallic v-block and shall be tested at ac potential respectively specified in the above list for 60-70 seconds.
Pulse overload	Resistance change rate is: (1%+0.05) Max. With no evidence of mechanical damage.	4.28 Resistance change after 10,000 cycles (1 second ON , 25 seconds OFF ) at 4 times RCWV.
Resistance to soldering heat	Resistance change rate is: (1%+0.05) Max. With no evidence of mechanical damage	4.18 Permanent resistance change when leads immersed to a point 2.0-2.5mm from the body in 2605 solder for 101 seconds.
Resistance to solvent	No deterioration of protective coatings & markings	4.29 Specimens shall be immersed in a bath of trichloroethylene completely for 3 min. With ultrasonic
Terminal strength	No evidence of mechanical damage	4.16 Direct load: Resistance to a 2.5 kg direct load for 10 seconds in the direction of the longitudinal axis of the terminal leads. Twist test: Terminal leads shall be bent through 90at a point of about 6mm from the body of the resistor and shall be rotated through 360 about the original axis of the bent terminal in alternating direction for a total of 3 rotations.
Solderability	95% coverage Min.	4.17 The area covered with a new, smooth, clean, shiny and continuous surface free from concentrated pinholes. Test temp. Of solder:2453 Dwell time in solder: 2~3seconds.
Temperature cycling	Resistance change rate is: (1%+0.05) Max.. With no evidence of mechanical damage.	4.19 Resistance change after continuous five cycles for duty cycle specified: Step Temperature Time 1 -55 3 30min 2 Room temp. 10 15min 3 +155 2 30min 4 Room temp. 10 15min
Load life in humidity	Normal type: 1.5%; flame retardant type: 5%	7.9 resistance change after 1,000 hours (1.5 hours ON,0.5 hour OFF) at RCWV in a humidity test chamber controlled at 402 and 90 to 95% relative humidity.
Load life	Normal type: 1.5%; flame retardant type: 5%	4.25.1 permanent resistance change after 1,000 hours operating at RCWV with duty cycle of 1.5 hours ON, 0.5 hour OFF at 702 ambient.