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 available with various forming options. They offer excellent long-term stability and comply with EU-RoHS requirements. Select models are AEC-Q200 qualified. These resistors are suitable for general applications and are explicitly noted as requiring contact with the manufacturer for use in automotive, medical, and aerospace equipment due to the potential for severe consequences in case of malfunction.
Product Attributes
- Brand: KOA Global (implied by www.koaglobal.com)
- Product Type: Low Power Type Resistors
- Sub-Type: Coat-Insulated Fixed Metal Film Resistors
- Coating Color: Light gray
- Marking: Color code
- Compliance: EU-RoHS
- Certifications: AEC-Q200 qualified (Exemption MF1/2)
- Material (Resistive Film): Metal Film
- Material (Core): Ceramic
- Material (Insulation Coating): Insulation coating
- Material (Electrode Cap): Electrode cap
- Material (Lead Wire): Lead wire
Technical Specifications
| Type | Power Rating (W) | T.C.R. (10-6/K) | Resistance Range () | 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 | C: 50 D: 100 | 49.9562k (C) 101M (D) | 250 | 500 | 300 | 3.2 / 3.4 / 1.7 / 0.45 | 28 |
| MF1/4 | 0.25 | C: 50 D: 100 L: 200 | 102.21M (C, D) 0.5110 (L) | 500 | 2,000 | 2,000 | 6.3 / 7.1 / 2.3 / 0.6 | 215 |
| MFS1/2 | 0.5 | C: 50 D: 100 | 101M (C) 102.21M (D) | 350 | 700 | 2,000 | 9.0 / 11.1 / 3.5 / 0.8 (d Nominal) | 215 |
| MF1/2 | 0.5 | C: 50 D: 100 L: 200 | 105.05M (C) 105.11M (D) 0.5110 (L) | 700 | 2,000 | 9.0 / 11.1 / 3.5 / 0.8 (d Nominal) | 360 |
Reference Standards: IEC 60115-2, JIS C 5201-2, EIAJ RC-2137
Rated Ambient Temperature: +70
Operating Temperature Range: -55+155
Performance Requirements (Example):
- Resistance: Within specified tolerance
- T.C.R.: Within specified T.C.R.
- Overload (Short time): R0.5% (Typical 0.3%)
- Resistance to soldering heat: R0.75% (MFS1/4), R0.5% (MF1/4, MFS1/2, MF1/2)
- Rapid change of temperature: R1.0% (Typical 0.3%)
- Moisture resistance: R1.5% (MFS1/4), R1% (MF1/4, MFS1/2, MF1/2)
- Endurance at 70: R1.5% (MFS1/4), R1% (MF1/4, MFS1/2, MF1/2)
Precautions for Use: Ionic impurities such as flux can affect moisture and corrosion resistance. Washing is recommended to remove these substances, especially when using lead-free solder. Contamination from storage or mounting environments (e.g., perspiration, salt) also requires washing.
2409300002_KOA-MF1-4DCT52A6801F_C202430.pdf
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