THICK FILM CHIP RESISTORS RK73B
The RK73B series offers a robust lineup of thick film chip resistors, available in sizes from 0402 to 6432. Featuring a metal glaze thick film for excellent heat and weather resistance, these resistors are suitable for both reflow and wave soldering. They are RoHS compliant, with exceptions for lead glass in electrodes, resistance film, and glass. AEC-Q200 data is available for most models.
Product Attributes
- Brand: KOA
- Product Type: Thick Film Chip Resistors
- Construction: Rectangular Chip Resistor
- Appearance Color: Black
- Material: Ceramic Substrate, Metal Glaze Thick Film
- Certifications: EU RoHS compliant (excluding lead glass), AEC-Q200 (except 1F)
- Reference Standards: IEC 60115-8, JIS C 5201-8, EIAJ RC-2134C
Technical Specifications
| Model (Size Code) | Dimensions (mm) L x W x t | Rated Power (at 70) | Max. Operating Temp. | Resistance Range () | Max. Operating Voltage | Max. Overload Voltage | Resistance Tolerance | TCR (x10-6/K) | Packaging (pcs/reel) |
|---|---|---|---|---|---|---|---|---|---|
| 1F (0402/01005) | 0.4 x 0.2 x 0.13 | 0.03W | 125 | 1 to 10M | 20V | 30V | 2%, 5% | 200, 250, 0 to +300 | 40,000 (TCM) |
| 1H (0603/0201) | 0.6 x 0.3 x 0.23 | 0.05W | 125 | 1 to 10M | 25V | 50V | 2%, 5% | 200, 400 | 15,000 (TBL/TCM) |
| 1E (1005/0402) | 1.0 x 0.5 x 0.35 | 0.1W | 125 | 1 to 10M | 75V | 100V | 2%, 5% | 200, 400 | 10,000 (TP) / 20,000 (TPL) |
| 1J (1608/0603) | 1.6 x 0.8 x 0.45 | 0.1W / 0.125W | 125 | 1.1k to 22M | - | - | 2%, 5% | 200, 400 | 10,000 (TP) |
| 2A (2012/0805) | 2.0 x 1.25 x 0.5 | 0.25W | 125 | 1 to 10M | 150V | 200V | 2%, 5% | 200, 400 | 10,000 (TP) / 5,000 (TD) / 4,000 (TCM) |
| 2B (3216/1206) | 3.2 x 1.6 x 0.6 | 0.25W | 125 | 1 to 22M | 200V | 400V | 2%, 5% | 200, 400 | 5,000 (TD) / 4,000 (TCM) |
| 2E (3225/1210) | 3.2 x 2.5 x 0.6 | 0.5W | 125 | 1 to 10M | - | - | 2%, 5% | 200, 400 | 5,000 (TD) / 4,000 (TCM) |
| W2H (5025/2010) | 5.0 x 2.5 x 0.65 | 0.75W | 125 | 1 to 22M | - | - | 2%, 5% | 200, 400 | 4,000 (TCM) |
| W3A (6432/2512) | 6.3 x 3.1 x 0.7 | 1.0W | 125 | 1 to 22M | 200V | 400V | 2%, 5% | 200, 400 | 4,000 (TCM) |
| W3A2 (6432/2512) | 6.3 x 3.1 x 0.7 | 2.0W | 95 | 1 to 22M | 200V | 400V | 2%, 5% | 200, 400 | 4,000 (TCM) |
Performance
The RK73B resistors are designed for various environmental conditions, including overload, solder heat, temperature cycling, humidity load, and high-temperature storage. Derating curves are provided for operation at elevated terminal temperatures.
Usage Precautions
- The ceramic substrate has a different thermal expansion coefficient than mounting boards, which can cause solder joint cracking under thermal stress. Larger sizes (W2H/W3A/W3A2) are more prone to this due to greater expansion and self-heating. Careful design consideration is needed for applications with significant temperature variations or load cycling.
- RK73B1F resistors are susceptible to damage from static electricity during assembly.
- When using at ambient temperatures of 70 or higher, rated power must be derated according to the power derating curve.
- When operating above the rated terminal temperature, derating is also required.
- For applications involving human safety or significant potential loss, contact KOA Global before use.
2403141437_KOA-RK73B2ETTD183J_C830162.pdf
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