THICK FILM CHIP RESISTORS RK73B
The RK73B series offers a robust lineup of thick film chip resistors, ranging from 0402 to 6432 sizes. Featuring a metal glaze thick film for excellent 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, resistive film, and glass. AEC-Q200 data is available for most models. These resistors are ideal for various applications including automotive, medical, and aerospace equipment, where reliability and performance are critical.
Product Attributes
- Brand: KOA
- Product Type: Thick Film Chip Resistors
- Structure: Rectangular Chip Resistor
- 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 t | Weight (g/1000pcs) | Rated Power (at 70) | Operating Temp. Range | Resistance Value Range () | Max. Operating Voltage | Max. Overload Voltage | TCR (10/K) |
|---|---|---|---|---|---|---|---|---|
| 1F (0402/01005) | 0.4x0.2x0.13 | 0.04 | 0.03W | -55+125 | 19.1 (250), 1091k (250), 100k1M (200), 100k10M (250) | 20V | 30V | 200, 250, 0+300 |
| 1H (0603/0201) | 0.6x0.3x0.23 | 0.14 | 0.05W | -55+155 | 19.1 (400), 1010M (200), 1010M (400) | 25V | 50V | 200, 400 |
| 1E (1005/0402) | 1.0x0.5x0.35 | 0.68 | 0.1W | -55+155 | 110M (200), 110M (400), 11M22M (400) | 75V | 100V | 200, 400 |
| 1J (1608/0603) | 1.6x0.8x0.45 | 2.14 | 0.1W | -55+155 | 1.1k10M (200), 1.1k10M (400), 11M22M (400) | - | - | 200, 400 |
| 1J AT (1608/0603) | 1.6x0.8x0.45 | 2.14 | 0.125W | -55+155 | 11k (200) | - | - | 200 |
| 2A (2012/0805) | 2.0x1.25x0.5 | 4.54 | 0.25W | -55+155 | 11M (200), 11M (400), 1.1M10M (400) | 150V | 200V | 200, 400 |
| 2B (3216/1206) | 3.2x1.6x0.6 | 9.14 | 0.25W | -55+155 | 15.6M (200), 15.6M (400), 6.2M10M (400), 6.2M22M (400) | 200V | 400V | 200, 400 |
| 2E (3225/1210) | 3.2x2.5x0.6 | 15.5 | 0.5W | -55+155 | 105.6M (200), 15.6M (200), 6.2M10M (400) | - | - | 200, 400 |
| W2H (5025/2010) | 5.0x2.5x0.65 | 24.3 | 0.75W | -55+155 | 105.6M (200), 15.6M (200), 6.2M22M (400) | - | - | 200, 400 |
| W3A (6432/2512) | 6.3x3.1x0.7 | 37.1 | 1.0W | -55+155 | 105.6M (200), 15.6M (200), 6.2M22M (400) | 200V | 400V | 200, 400 |
| W3A2 (6432/2512) | 6.3x3.1x0.7 | 37.1 | 2.0W | -55+95 | 105.6M (200), 15.6M (200), 6.2M22M (400) | 200V | 400V | 200, 400 |
Performance
| Test Item | Guaranteed Value | Typical 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) | - | 2.5 times rated voltage for 5s (1E, 2B, W3A2: 2 times) |
| Resistance to Soldering Heat | 0.5 (10R1M), 1 (R10, R1M) | - | 2605, 10s1s |
| Temperature Cycling | 1 (1F, Perf. "A"), 0.5 (others) | 0.5 (1F, Perf. "A"), 0.3 (others) | -55(30min.)/+125(30min.), 100 cycles (Perf. "A": 1000 cycles) |
| Damp Heat Load | 2 (1J, 2A, 2B), 3 (others) | 0.75 (1J, 2A, 2B), 1 (others), 1.5 (1F) | 402, 90%95%RH, 1000h (1.5h ON, 0.5h OFF cycle) |
| Endurance | 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 Storage | 1 | 0.5 (1F), 0.3 (others) | +125, 1000h (1F); +155, 1000h (others) |
Power Derating Curves
Refer to the provided graphs for power derating based on terminal temperature and ambient temperature. Note that for ambient temperatures of 70 and above, derating is necessary. Exceeding rated terminal temperatures also requires derating according to the curves. Specific curves are provided for different model groups.
Temperature Rise Data
Temperature rise data is provided for various models under specific measurement conditions (Room temp: 25, Substrate: FR-4 t=1.6mm, Cu foil: 35m). This data serves as a reference, and actual performance may vary based on usage conditions and substrate.
Single Pulse Limiting Power Curve
Graphs illustrating the single-pulse limiting electric power for different pulse durations are available for RK73B 1F-2A and RK73B 2B-W3A2 series. The upper limit for applied voltage is the maximum overload voltage. Consult for continuous pulse tolerance.
2403141437_KOA-RK73B2ETTD241J_C830173.pdf
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