Product Overview
The Low Power Type Resistors, specifically the Coat-Insulated Fixed Metal Film Resistors (MF series), are high-precision, low T.C.R. metal film resistors designed for automatic insertion and various forming processes. They offer excellent long-term stability and comply with EU RoHS requirements. Select models are AEC-Q200 qualified. These resistors are suitable for general use and are available in multiple types with varying power ratings, resistance ranges, and tolerances. For applications involving automotive, medical, or aerospace equipment, or any scenario where failure could lead to personal injury or significant damage, prior contact with the manufacturer is mandatory.
Product Attributes
- Brand: KOA Global (implied by www.koaglobal.com)
- Product Type: Low Power Type Resistors
- Series: METAL FILM MF
- Construction: Coat-Insulated Fixed Metal Film Resistors
- Coating Color: Light gray
- Marking: Color code
- Certifications: EU RoHS compliant, AEC-Q200 qualified (Exemption MF1/2)
- Origin: Not specified
- Material: Not specified (Resistive film, Ceramic core, Electrode cap, Lead wire, Insulation coating)
Technical Specifications
| Model Type | Power Rating (W) | Resistance Range () | T.C.R. (10-6/K) | Tolerance | Max. Working Voltage (V) | Max. Overload Voltage (V) | Dielectric Withstanding Voltage (V) | Dimensions (mm) L 0.2 / C 0.3 / D 0.1 / d (Nominal) | Weight (g/1000pcs) |
|---|---|---|---|---|---|---|---|---|---|
| MFS1/4 | 0.25 | 49.9562k | C: 50 D: 100 | D: 0.5% F: 1% G: 2% | 250 | 500 | 300 | 3.2 / 3.4 / 1.7 / 0.45 | 28 |
| MF1/4 | 0.25 | 102.21M | C: 50 D: 100 L: 200 | D: 0.5% F: 1% G: 2% | 500 | 2,000 (MF1/4) | 2,000 | 6.3 / 7.1 / 2.3 / 0.6 | 215 |
| MFS1/2 | 0.5 | 101M | C: 50 D: 100 | D: 0.5% F: 1% G: 2% | 350 | 700 | 2,000 | 9.0 / 11.1 / 3.5 / 0.8 (approximate, based on MF1/2 dimensions) | 215 (approximate, based on MF1/2 weight) |
| MF1/2 | 0.5 | 105.05M | C: 50 D: 100 L: 200 | D: 0.5% F: 1% G: 2% | 700 | 2,000 (MF1/2) | 2,000 | 9.0 / 11.1 / 3.5 / 0.8 (approximate, based on MF1/2 dimensions) | 360 |
| Test Item | Performance Requirements (Limit) | Test Methods |
|---|---|---|
| Resistance | Within specified tolerance | +25 |
| T.C.R. | Within specified T.C.R. | +25/+125 |
| Overload (Short time) | 0.5% (MFS1/4), 0.5% (MF1/4), 0.5% (MFS1/2), 0.5% (MF1/2) | Rated voltage 2.5 or Max. overload vol., whichever is lower, for 5s (MFS1/4, MF1/4, MF1/2); Rated voltage 2 or Max. overload vol., whichever is lower, for 5s (MFS1/2) |
| Resistance to soldering heat | 0.75% (MFS1/4), 0.5% (MF1/4, MFS1/2, MF1/2) | 2605, 10s1s |
| Rapid change of temperature | 1.0% | -55 (30min.) / +155 (30min.) 5 cycles |
| Moisture resistance | 1.5% (MFS1/4), 1% (MF1/4, MFS1/2, MF1/2) | 402, 90%95%RH, 1000h (1.5h ON/0.5h OFF cycle) |
| Endurance at 70 | 1.5% (MFS1/4), 1% (MF1/4, MFS1/2, MF1/2) | 702, 1000h (1.5h ON/0.5h OFF cycle) |
Reference Standards: IEC 60115-2, JIS C 5201-2, EIAJ RC-2137
Rated Ambient Temperature: +70
Operating Temperature Range: -55+155
Rated voltage calculation: Power RatingResistance value or Max. working voltage, whichever is lower.
Derating Curve: For ambient temperatures of 70 or above, power rating shall be derated in accordance with the provided curve.
Precautions for Use: Ionic impurities such as flux can affect moisture and corrosion resistance. Cleaning is recommended, especially when using lead-free solder or RMA flux. Contamination from perspiration or salt can also affect performance and requires cleaning.
2409300002_KOA-MF1-4CCT52A5100F_C315659.pdf
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