Thick Film Chip Resistors KOA RK73B2ETTD6R8J Ceramic Substrate Metal Glaze Rectangular Chip Components
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 superior heat and weather resistance, these resistors are suitable for both reflow and wave soldering. They comply with EU RoHS directives for lead-free terminals, 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 Resistors
- Appearance Color: Black
- Material: Ceramic Substrate, Metal Glaze Thick Film
- Certifications: EU RoHS compliant (terminals lead-free), AEC-Q200 (excluding 1F)
- Reference Standards: IEC 60115-8, JIS C 5201-8, EIAJ RC-2134C
Technical Specifications
| Model (Size Code) | Dimensions (mm) L x W x d x t | Weight (g/1000pcs) | Rated Power | Operating Temp. Range | Resistance Value Range () | Tolerance | Max. Operating Voltage | Max. Overload Voltage | Packaging (pcs/reel) |
| 1F (0402/01005) | 0.40.02 x 0.20.02 x 0.110.03 x 0.130.02 | 0.04 | 0.03W | -55+125 | 19.1k (250), 10k10M (200) | G:2%, J:5% | 20V | 30V | TCM: 15,000, TX: 40,000 |
| 1H (0603/0201) | 0.60.03 x 0.30.03 x 0.150.05 x 0.230.03 | 0.14 | 0.05W | -55+155 | 19.1 (400), 1010M (200) | G:2%, J:5% | 25V | 50V | TCM: 15,000 |
| 1E (1005/0402) | 1.0 +0.1/-0.05 x 0.50.05 x 0.25 +0.05/-0.1 x 0.350.05 | 0.68 | 0.1W | -55+155 | 110M (200) | G:2%, J:5% | 75V | 100V | TPL: 20,000, TP: 10,000 |
| 1J (1608/0603) | 1.60.2 x 0.80.1 x 0.30.1 x 0.450.1 | 2.14 | 0.1W / 0.125W | -55+155 | 1.1k10M (200), 11M22M (400), 11k (200) | G:2%, J:5% | - | - | TP: 10,000 |
| 2A (2012/0805) | 2.00.2 x 1.250.1 x 0.3 +0.2/-0.1 x 0.50.1 | 4.54 | 0.25W | -55+155 | 11M (200), 1.1M10M (400) | G:2%, J:5% | 150V | 200V | TP: 10,000, TD: 5,000 |
| 2B (3216/1206) | 3.20.2 x 1.60.2 x 0.4 +0.2/-0.1 x 0.60.1 | 9.14 | 0.25W | -55+155 | 15.6M (200), 6.2M22M (400) | G:2%, J:5% | 200V | 400V | TP: 10,000, TD: 5,000 |
| 2E (3225/1210) | - x 2.60.2 x 0.4 +0.2/-0.1 x 0.50.3 | 15.5 | 0.5W | -55+155 | 15.6M (200), 6.2M10M (400) | G:2%, J:5% | - | - | TP: 10,000, TD: 5,000 |
| W2H (5025/2010) | 5.00.2 x 2.50.2 x 0.650.15 x - | 24.3 | 0.75W | -55+155 | 15.6M (200), 6.2M22M (400) | G:2%, J:5% | - | - | TD: 4,000 |
| W3A (6432/2512) | 6.30.2 x 3.10.2 x - x - | 37.1 | 1.0W | -55+155 | 15.6M (200), 6.2M22M (400) | G:2%, J:5% | 200V | 400V | TD: 4,000 |
| W3A2 (6432/2512) | 6.30.2 x 3.10.2 x - x - | - | 2.0W5 | -55+155 (95 for 2W) | 15.6M (200), 6.2M22M (400) | G:2%, J:5% | 200V | 400V | TD: 4,000 |
Performance
| Test Item | Guarantee Value | Representative Value | Test Method |
| Resistance Value | Within specified tolerance | - | 25 |
| Temperature Coefficient of Resistance | Within specified value | - | +25/-55, +25/+125 |
| Overload (Short time) | 1:1F, 0.5:others | - | 2.5x rated voltage for 5s (2x for 1E, 2B, W3A2) |
| Resistance to Soldering Heat | 1:1FW3A2 (10R1M), 3:others | 0.5:1FW3A2 (10R1M), 1:others | 2605, 10s1s |
| Temperature Cycling | 1:1F, Performance "A" (Heat Shock); 0.5:others | 0.5:1F, Performance "A" (Heat Shock); 0.3:others | -55(30min.)/+125(30min.), 100 cycles (1000 cycles for "A") |
| Damp Heat Load | 2:1J, 2A, 2B; 3:others | 0.75:1J, 2A, 2B; 1.5:1F; 1:others | 402, 90%95%RH, 1000h (1.5h ON, 0.5h OFF cycle) |
| Durability | 2:1J, 2A, 2B; 3:others | 0.75:1J, 2A, 2B; 1:others | 702 or rated terminal temp. 2, 1000h (1.5h ON, 0.5h OFF cycle) |
| High Temperature Exposure | 1 | 0.5:1F; 0.3:others | +125, 1000h (1F); +155, 1000h (others) |
Power Derating Curve
Graphs showing power derating based on terminal temperature and ambient temperature are provided in the original document. Users should consult these curves for operation above rated ambient or terminal temperatures.
Temperature Rise Data
Graphs illustrating temperature rise at hot spots and terminals under various power ratings are available in the original document.
Single Pulse Limiting Power Curve
Curves showing the single-pulse limiting electric power versus pulse duration for different model series are presented in the original document.
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