KOA RK73H Flat Chip Resistors (Precision Grade)
The KOA RK73H series are precision-grade flat chip resistors designed for a wide range of applications, including automotive, medical, and aerospace equipment. These resistors feature a small, lightweight design with excellent heat and weather resistance due to their metal glaze thick film construction. The triple-layer electrode structure ensures high stability and reliability. They are compatible with various automatic mounters and suitable for both flow and reflow soldering. Terminations are lead-free and comply with EU-RoHS requirements, with exceptions for lead glass in the electrode, resistor element, and glass.
Product Attributes
- Brand: KOA
- Product Type: Flat Chip Resistors (Precision Grade)
- Coating Color: Black (1F, 1H), Blue (1E, 1J, 2A, 2B, 2E, W2H, W3A, W3A2)
- Material: Metal glaze thick film
- Certifications: EU-RoHS compliant (terminals lead-free), AEC-Q200 qualified (Exemption 1F)
- Origin: Japan (implied by manufacturer and language)
Technical Specifications
| Type (Inch Size Code) | Dimensions (mm) L x W x c x d x t | Weight (1000pcs) | Power Rating | Rated Ambient Temp. | Rated Terminal Part Temp. | T.C.R. (10-6/K) | Resistance Range () | Max. Working Voltage | Max. Overload Voltage | Packaging & Q'ty/Reel (pcs) |
| 1F (01005) | 0.40.02 x 0.20.02 x 0.100.03 x 0.110.03 x 0.130.02 | 0.04 | 0.03W | 70 | 200 (100k1M), 250 (1091k) | 101M4 | 20V | 30V | 40,000 (TX), 20,000 (TBL, TA, TC, TCM, TPL, TP, TD, TE) | |
| 1H (0201) | 0.60.03 x 0.30.03 x 0.10.05 x 0.150.05 x 0.230.03 | 0.14 | 0.05W | 70 | 200 (101M), 400 (19.1) | 1010M4 | 25V | 50V | 35,000 (TX), TC:10,000, TCM:15,000 (others) | |
| 1E (0402) | 1.0+0.1-0.05 x 0.50.05 x 0.20.1 x 0.25+0.05-0.1 x 0.350.05 | 0.68 | 0.1W | 70 | 125 | 100 (101M), 200 (19.76), 400 (1.02M10M) | 101M | 75V | 100V | TPL:20,000, TP:10,000 (others) |
| 1J (0603) | 1.60.2 x 0.80.1 x 0.30.1 x 0.30.1 x 0.450.1 | 2.14 | 0.1W | 70 | 125 | 100 (1.02k1M), 200 (1.02M10M) | 1.02k1M | TP:10,000, 5,000 (others) | ||
| 1J (0603) | 1.60.2 x 0.80.1 x 0.30.1 x 0.30.1 x 0.450.1 | 2.14 | 0.125W | 70 | 125 | 100 (101k), 200 (19.76) | 101k | TP:10,000, 5,000 (others) | ||
| 2A (0805) | 2.00.2 x 1.250.1 x 0.40.2 x 0.3+0.2-0.1 x 0.50.1 | 4.54 | 0.25W | 70 | 125 | 100 (101M), 200 (19.76), 400 (1.02M10M) | 101M | 150V | 200V | TP:10,000, 5,000, 4,000 (others) |
| 2B (1206) | 3.20.2 x 1.60.2 x 0.50.3 x 0.4+0.2-0.1 x 0.60.1 | 9.14 | 0.25W | 70 | 125 | 100 (101M), 200 (19.76), 400 (1.02M5.6M) | 101M | 200V | 400V | 5,000, 4,000 (others) |
| 2E (1210) | 2.60.2 x 15.5 (W2H) | 0.5W | 70 | 125 | 100 (101M), 200 (19.76), 400 (1.02M5.6M) | 101M | 5,000, 4,000 (others) | |||
| W2H (2010) | 5.00.2 x 2.50.2 x 0.650.15 | 24.3 | 0.75W | 70 | 125 | 100 (101M), 200 (19.76), 400 (1.02M5.6M) | 101M | 4,000 (others) | ||
| W3A (2512) | 6.30.2 x 3.10.2 | 37.1 | 1W | 70 | 125 | 100 (101M), 200 (19.76), 400 (1.02M5.6M) | 101M | 200V (500V5) | 400V (500V5) | 4,000 (others) |
| W3A2 (2512) | 6.30.2 x 3.10.2 | 37.1 | 2W | 95 | 100 (101M), 200 (19.76), 400 (1.02M5.6M) | 101M | 200V | 400V | 4,000 (others) |
Performance
| Test Items | Performance Requirements (R(0.1 )) | Test Methods | |
| Resistance | Within specified tolerance | ||
| Resistance Temperature Coefficient (T.C.R.) | Within specified T.C.R. | ||
| Overload (Short time) | 1: 1F, 0.5: others (Rated voltage 2.5 for 5s) | 1E, 2B, W3A2: Rated voltage2 for 5s | |
| Resistance to soldering heat | 1: 1FW3A (10R1M), 3: 1HW3A (R<10, R>1M) | 0.5: 1FW3A (10R1M), 1: 1HW3A (R<10, R>1M) | 2605, 10s1s |
| Rapid change of temperature | 1: 1F, 0.5: others | 0.5: 1F, 0.3: others | -55 (30min.) /+125 (30min.), 100 cycles |
| Moisture resistance | 2: 1J, 2A, 2B, 3: another | 0.75: 1J, 2A, 2B, 1.5: 1F, 1: another | 402, 90%95%RH, 1000h (1.5h ON/0.5h OFF cycle) |
| Endurance at 70 | 2: 1J, 2A, 2B, 3: another | 0.75: 1J, 2A, 2B, 1: another | 702, 1000h (1.5h ON/0.5h OFF cycle) |
| High temperature exposure | 1 | 0.5: 1F, 0.3: another | +125, 1000h: 1F; +155, 1000h: 1H,1E, 1J, 2A, 2B, 2E, W2H, W3A, W3A2 |
Note:
4 The nominal resistance value for RK73H1F (F: 1%) and RK73H1H (1R9.1, 1MR10M) is E24.
5 Please consult with us about the Max. working voltage and the Max. overload voltage with ( ).
2410121533_KOA-RK73H2BTTD5903F_C880233.pdf
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