Product Overview
The RN73 Metal Film Flat Chip Resistors are surface-mount, high-precision resistors designed for various industrial equipment control circuits. They offer tight resistance tolerances (down to 0.05%) and excellent temperature coefficient performance (as low as 510-6/K). These resistors are suitable for both flow and reflow soldering and feature lead-free terminations compliant with EU-RoHS requirements. They are designed for reliability in demanding applications.
Product Attributes
- Brand: KOA
- Product Series: RN73
- Type: Metal Film Flat Chip Resistors
- Coating Color: Black (1E), Green (1J, 2A, 2B, 2E)
- Certifications: EU-RoHS compliant
- Origin: Japan (implied by company name and typical industry practice, but not explicitly stated)
Technical Specifications
| Type (Inch Size Code) | Dimensions (mm) L x W x t | Weight (1000pcs) (g) | Nominal Resistance Range () | Resistance Tolerance | Power Rating (W) | Max. Working Voltage (V) | Max. Overload Voltage (V) | T.C.R. (10-6/K) | Taping & Q'ty/Reel (pcs) |
| 1E (0402) | 1.0 x 0.5 x 0.35 | 0.68 | 10120k | 0.05% to 1% | 0.063 | 50 | 100 | 250, 500 | 10,000 (TP, TD, TE) |
| 1J (0603) | 1.6 x 0.8 x 0.45 | 2.14 | 1k47k (General) 10047k0 (High Power) 15360k (High Power) | 0.05% to 1% | 0.063 (General) 0.1 (High Power) | 75 | 150 | 100, 250, 500, 100 | 5,000 (TP, TD, TE) |
| 2A (0805) | 2.0 x 1.25 x 0.5 | 4.54 | 100100k (General) 1001M. (High Power) 51100k (High Power) | 0.05% to 1% | 0.1 (General) 0.125 (High Power) | 150 | 300 | 100, 250, 500, 100 | 5,000 (TP, TD, TE) 4,000 (TE) |
| 2B (1206) | 3.2 x 1.6 x 0.6 | 9.14 | 100300k (General) 1001M. (High Power) 51300k (High Power) | 0.05% to 1% | 0.125 (General) 0.25 (High Power) | 200 | 400 | 100, 250, 500, 100 | 5,000 (TP, TD, TE) 4,000 (TE) |
| 2E (1210) | 2.5 x 2.0 x 0.6 | 14.5 | 100510k (General) 1001M. (High Power) 51510k (High Power) | 0.05% to 1% | 0.25 | 200 | 400 | 100, 250, 500, 100 | 5,000 (TP, TD, TE) 4,000 (TE) |
Performance
| Test Items | Performance Requirements (R(0.05 )) | Test Methods |
| Resistance | Within specified tolerance | |
| Resistance Temperature Coefficient (T.C.R.) | Within specified T.C.R. | +25/+125T.C.R.510-6/K +25/ 55 and +25/125another |
| Overload (Short time) | General: 0.1 High Power: 0.5 | Rated voltage2.5 or Max. overload vol., whichever is less, for 5s |
| Resistance to soldering heat | 0.1 | 2605, 10s1s |
| Rapid change of temperature | 0.25 | -5530min./12530min.300 cycles |
| Moisture resistance | General: 0.5 High Power: 0.5 | 402, 90%95%RH, 1000h (1.5h ON/0.5h OFF cycle) |
| Endurance at 70 | General: 0.25 High Power: 0.5 | 702, 1000h (1.5h ON/0.5h OFF cycle) |
| High temperature exposure | 0.25 | +125, 1000h |
| High temperature exposure | 0.5 | +155, 1000h |
Precautions for Use
Handle with care to avoid electrostatic discharge, which can lead to component damage or resistance value changes. Ensure proper cleaning after soldering, especially with lead-free solders, to remove ionic impurities that can affect moisture and corrosion resistance. Avoid direct contact of tape adhesives with the product and be cautious of water pressure during cleaning processes to prevent electrode exfoliation. When operating above rated ambient or terminal part temperatures, derating of power is required according to the provided curves.
2410121632_KOA-RN731ETTP4301B25_C186340.pdf
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