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Specifications
Type:
Metal Film Resistor
Resistance:
1kΩ
Voltage-Supply(Max):
250V
Power(Watts):
250mW
Temperature Coefficient:
±5ppm/℃
Tolerance:
±0.1%
Operating Temperature:
-55℃~+125℃
Mfr. Part #:
MMFR2568B1K00V9
Package:
Through Hole,D2.5xL6.8mm
Key Attributes
Model Number:
MMFR2568B1K00V9
Product Description
MMFR Precision Metal Film Molded Resistor
The MMFR series is a precision metal film molded resistor designed for high-end manufacturing and precision instrumentation applications. It offers tight tolerance, low TCR, and high load life stability, utilizing alumina ceramic cores and precision metal film deposition technology. The leaded structure minimizes PCB stress, making it ideal for circuits demanding high TCR and stability.
Product Attributes
- Brand: C&B Electronics
- Origin: Shenzhen, China
- Material: Metal Film on Alumina Ceramic Core
- Certifications: IEC 60115-1
Technical Specifications
| Size | Rated Power | Max. Operating Voltage | Operating Temperature | E-Series Value | TCR | Resistance Tolerance | Max. Overload Voltage |
| MMFR3679 | 1.36W | 161V | -65~+155 | E15, E75 | 50ppm/ | 0.1%, 0.2%, 0.5%, 1% | 161V |
| MMFR4821 | 1.6W | 211V | -65~+155 | E15, E75 | 50ppm/ | 0.1%, 0.2%, 0.5%, 1% | 211V |
| MMFR6326 | 1.86W | 211V | -65~+155 | E15, E75 | 50ppm/ | 0.1%, 0.2%, 0.5%, 1% | 211V |
| MMFR7629 | 2.1W | 211V | -65~+155 | E15, E75 | 50ppm/ | 0.1%, 0.2%, 0.5%, 1% | 211V |
Dimensions & Packaging
| Size | L (mm) | D (mm) | d (mm) | Quantity Per Bulk |
| MMFR3679 | 10.61.5 | 3.61.1 | 0.70.1 | 1000pcs |
| MMFR4821 | 14.81.5 | 4.61.1 | 0.70.1 | 1000pcs |
| MMFR6326 | 16.31.5 | 6.11.1 | 0.90.1 | 1000pcs |
| MMFR7629 | 17.61.5 | 7.61.1 | 1.00.1 | 1000pcs |
Performance Test
| Performance Test | Test Method | Standards | Max. Change |
| Moisture Resistance | 553, 90-95% RH for 67 days, 1.2xRCWV or the maximum operating voltage (the lower one) | IEC 60115-1, 5.3.15 | 0.1%+0.1 |
| Insulation Resistance | Apply a DC voltage of 211V between the electrode and the substrate for 60s and measure the insulation resistance | IEC 60115-1, 5.7 | 10000M, minimum |
| Load Life | 853, 1000h, RCWV or maximum operating voltage (the lower one) | IEC 60115-1, 5.3.16 | 0.1%+0.1 |
| TCR | +70, +15 Ref. | IEC 60115-1, 5.9 | Within the nominal value range |
| Resistance to Solder Heat | 1704, 202s, immersed 40.6mm of the body | IEC 60115-1, 5.2.9 | 0.1%+0.1 |
| Short-Time Overload | 2x RCWV or 1x maximum operating voltage (the lower one) for 5s | IEC 60115-1, 5.2.14 | 0.1% No visible damage |
| Resistance to Solvent | Immerse in IPA for 6 min with ultrasonic | IEC 60115-1, 5.4.1 | Clear marking No visible damage |
| Solderability | 1406, 40.6s | IEC 60115-1, 5.2.8 | 90% coverage |
| Dielectric Withstanding Voltage | Apply a AC voltage with an effective maximum overload voltage between the electrode and the substrate at a speed of approximately 200V/s, for 60s | IEC 60115-1, 4.7 | No breakdown or flashover |
2409141123_RESI-MMFR2568B1K00V9_C7603280.pdf
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