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Specifications
Type:
Metal Film Resistor
Resistance:
390Ω
Voltage-Supply(Max):
250V
Power(Watts):
250mW
Temperature Coefficient:
±50ppm/℃
Tolerance:
±1%
Mfr. Part #:
MFR0W4F3900A50
Package:
Through Hole,D2.2xL6.5mm
Key Attributes
Model Number:
MFR0W4F3900A50
Product Description
UNIROYAL ELECTRONICS INDUSTRY CO., LTD. - LEAD-FREE METAL FILM FIXED RESISTORS MFR SERIES
This document specifies the requirements for Lead-Free Metal Film Fixed Resistors manufactured by UNIOHM. These resistors are designed for various electronic applications requiring stable and reliable resistance values.
Product Attributes
- Brand: UNIROYAL ELECTRONICS INDUSTRY CO., LTD. (UNIOHM)
- Product Name: LEAD-FREE METAL FILM FIXED RESISTORS
- Part Name: MFR SERIES
- Origin: CHINA
- Certifications: RoHS (implied by Lead-Free)
- Material: Metal Film (Resistance layer), Ceramic (Basic body), Cold steel plated with copper/tin (End cap), Tin solder coated copper wire (Lead wire), Epoxy resin (Coating, Color bands)
- Color: Blue (Normal size and 1/2W small size inflammable resin), Light Green (Other small size non-inflammable resin), Deep Green (Ultra-small size-0.4WSS non-inflammable resin)
Technical Specifications
| Type | Power Rating | Dimensions (mm) L x D d 0.05 | Max Working Voltage | Max Overload Voltage | Dielectric Withstanding Voltage | Tolerance | Resistance Range | |
|---|---|---|---|---|---|---|---|---|
| MF 1/8W | 1/8W | 3.30.3 x 1.90.3 (0.45) | 28 | 200V | 400V | 400V | 1%, 2% | 10~1M |
| 5% | 1~1M | |||||||
| MF 1/4W | 1/4W | 6.51.0 x 2.20.3 (0.54) | 28 | 250V | 500V | 500V | 1%, 2% | 10~1M |
| 5% | 1~1M | |||||||
| MF 1/2W | 1/2W | 9.51.0 x 3.00.6 (0.54) | 28 | 350V | 700V | 700V | 1%, 2% | 10~1M |
| 5% | 1~1M | |||||||
| MF 1W | 1W | 11.51.0 x 4.50.6 (0.65) | 28 | 500V | 1000V | 1000V | 1%, 2% | 51.1~1M |
| 5% | 1~1M | |||||||
| MF 2W | 2W | 15.51.0 x 5.00.6 (0.70) | 28 | 500V | 1000V | 1000V | 1%, 2% | 51.1~1M |
| 5% | 1~1M | |||||||
| MF 3W | 3W | 17.51.0 x 6.00.6 (0.75) | 28 | 500V | 1000V | 1000V | 1%, 2% | 51.1~1M |
| 5% | 1~1M | |||||||
| MF 1/4WS | 1/4WS | 3.30.3 x 1.90.5 (0.45) | 28 | 200V | 400V | 200V | 1%, 2% | 10~1M |
| 5% | 1~1M | |||||||
| MF 0.4WSS | 0.4WSS | 3.30.3 x 1.90.5 (0.45) | 28 | 200V | 400V | 200V | 1%, 2% | 10~1M |
| 5% | 1~1M | |||||||
| MF 1/2WSS | 1/2WSS | 6.50.5 x 2.20.5 (0.54) | 28 | 250V | 500V | 250V | 1% | 10~1M |
| 2%, 5% | 1~1M | |||||||
| MF 1/2WS | 1/2WS | 9.01.0 x 2.70.5 (0.54) | 28 | 350V | 700V | 700V | 1%, 2% | 10~1M |
| 5% | 1~1M | |||||||
| MF 0.6WS | 0.6WS | 6.51.0 x 2.20.5 (0.54) | 28 | 250V | 500V | 250V | 1% | 10~1M |
| 2%, 5% | 1~1M | |||||||
| MF 1WS | 1WS | 9.51.0 x 3.50.6 (0.60) | 28 | 350V | 700V | 350V | 1%, 2%, 5% | 10~1M |
| MF 2WS | 2WS | 11.51.0 x 4.00.6 (0.65) | 28 | 500V | 1000V | 350V | 1%, 2%, 5% | 10~1M |
| MF 3WS | 3WS | 15.51.0 x 5.00.6 (0.70) | 28 | 500V | 1000V | 350V | 1%, 2%, 5% | 10~1M |
| Item | Limits | Test Method (JIS-C-5201&5202) |
|---|---|---|
| Temperature Coefficient | 0.1% 15 PPM/Max. 0.25% 25 PPM/Max. 0.5% 50PPM/Max. 1% 50PPM/Max. 2% 100PPM/Max. 5% 200PPM/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) |
| Short-time overload | (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 | (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 | (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 | (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. |
2410121333_UNI-ROYAL-MFR0W4F3900A50_C58646.pdf
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