Thick Film Chip Resistors Metal Glaze Ceramic Substrate KOA RK73B2ATTD565J with RoHS Compliance
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 reflow and wave soldering processes. They are RoHS compliant with lead-free terminals, and lead-containing glass in electrodes, resistive film, and glass are exempt from EU RoHS directives. AEC-Q200 data is available for most models.
Product Attributes
- Brand: RK73B
- Appearance Color: Black
- Material: Metal glaze thick film, Ceramic substrate
- Certifications: AEC-Q200 (excluding 1F), EU RoHS compliant terminals
- Reference Standards: IEC 60115-8, JIS C 5201-8, EIAJ RC-2134C
Technical Specifications
| Model (Size Code) | Dimensions (mm) L x W x H | Weight (g/1000pcs) | Rated Power | Operating Temp. Range | Resistance Value Range () | Max. Operating Voltage | Max. Overload Voltage | TCR (10-6/K) | Packaging (pcs/reel) |
| 1F (0402/01005) | 0.4 x 0.2 x 0.13 | 0.04 | 0.03W | -55 ~ +125 | 1 ~ 9.1 (250), 10 ~ 91k (250), 100k ~ 10M (200) | 20V | 30V | 200, 250, 0~+300 | 40,000 (TCM) |
| 1H (0603/0201) | 0.6 x 0.3 x 0.23 | 0.14 | 0.05W | -55 ~ +155 | 1 ~ 9.1 (400), 10 ~ 10M (200) | 25V | 50V | 200, 400 | 15,000 (TBL/TCM) |
| 1E (1005/0402) | 1.0 x 0.5 x 0.35 | 0.68 | 0.1W | -55 ~ +155 | 1 ~ 10M (200), 11M ~ 22M (400) | 75V | 100V | 200, 400 | 10,000 (TP), 20,000 (TPL) |
| 1J (1608/0603) | 1.6 x 0.8 x 0.45 | 2.14 | 0.1W / 0.125W | -55 ~ +155 | 1 ~ 1k (0.125W, 200), 1.1k ~ 10M (0.1W, 200), 11M ~ 22M (0.1W, 400) | - | - | 200, 400 | 10,000 (TP) |
| 2A (2012/0805) | 2.0 x 1.25 x 0.5 | 4.54 | 0.25W | -55 ~ +155 | 1 ~ 1M (200), 1.1M ~ 10M (400) | 150V | 200V | 200, 400 | 10,000 (TP), 5,000 (TD) |
| 2B (3216/1206) | 3.2 x 1.6 x 0.6 | 9.14 | 0.25W | -55 ~ +155 | 1 ~ 5.6M (200), 6.2M ~ 22M (400) | 200V | 400V | 200, 400 | 5,000 (TD), 4,000 (TE) |
| 2E (3225/1210) | - | - | 0.5W | -55 ~ +155 | 1 ~ 5.6M (200), 6.2M ~ 10M (400) | - | - | 200, 400 | 5,000 (TD), 4,000 (TE) |
| W2H (5025/2010) | 5.0 x 2.5 x 0.65 | 24.3 | 0.75W | -55 ~ +155 | 1 ~ 5.6M (200), 6.2M ~ 22M (400) | - | - | 200, 400 | 4,000 (TD) |
| W3A (6432/2512) | 6.3 x 3.1 x - | 37.1 | 1.0W | -55 ~ +155 | 1 ~ 5.6M (200), 6.2M ~ 22M (400) | 200V | 400V | 200, 400 | 4,000 (TD) |
| W3A2 (6432/2512) | - | - | 2.0W* | -55 ~ +95 | 1 ~ 5.6M (200), 6.2M ~ 22M (400) | 200V | 400V | 200, 400 | 4,000 (TD) |
*Note: W3A2 rated power is 2.0W at 70 ambient temperature, derating applies above this temperature.
Usage Notes: - The base material of chip resistors is alumina. Due to the difference in thermal expansion coefficient from the mounting substrate, solder cracks may occur at the joint (solder part) when subjected to thermal stress such as repeated thermal cycles. Special attention is required for larger sizes (W2H/W3A/W3A2) due to greater thermal expansion and self-heating. - RK73B1F resistors are susceptible to damage from static electricity during equipment assembly. - When using at high power, the component temperature may rise depending on the heat dissipation conditions of the substrate. Always confirm terminal temperature and product specifications/precautions before use. - For applications involving human safety or significant loss, contact the company beforehand.
Performance: Refer to the detailed performance table in the original document for resistance value, temperature coefficient, overload, solder heat resistance, temperature, humidity, and durability tests.
Derating Curves: Power derating curves based on terminal temperature and ambient temperature are provided in the original document.
Temperature Rise Data: Temperature rise data under specific measurement conditions (25 ambient, FR-4 substrate) is available in the original document.
Single Pulse Limiting Power Curve: Curves for single pulse limiting electric power versus pulse duration are provided for different model groups in the original document.
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