THICK FILM CHIP RESISTORS RK73B
The RK73B series of thick film chip resistors offers a robust product lineup from 0402 to 6432 sizes. Featuring a metal glaze thick film for the protective coating, these resistors exhibit excellent heat and weather resistance. They are compatible with reflow and wave soldering processes and comply with EU RoHS directives for lead-free terminals. AEC-Q200 data is available for most models. These resistors are suitable for general-purpose applications, including automotive, medical, and aerospace equipment where safety and reliability are paramount.
Product Attributes
- Brand: KOA (implied by www.koaglobal.com)
- Product Type: Thick Film Chip Resistors
- Series: RK73B
- Structure: Rectangular Chip Resistor
- Appearance Color: Black
- Material: Metal glaze thick film (protective coating), Ceramic substrate
- 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 Range () | Resistance Tolerance | Max. Operating Voltage | Max. Overload Voltage | TCR (x10-6/K) | 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 | 19.1 (250), 1091k (250), 100k1M (200), 100k10M (200) | G:2%, J:5% | 20V | 30V | 200, 250, 0+300 | 40,000 (TCM), 20,000 (TBL) |
| 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 | 200, 400 | 15,000 (TCM) |
| 1E (1005/0402) | 1.0+0.1-0.05 x 0.50.05 x 0.250.05 x 0.350.05 | 0.68 | 0.1W | -55+155 | 110M (200), 110M (200) | G:2%, J:5% | 75V | 100V | 200 | 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), 1.1k10M (200), 11k (200), 11M22M (400) | G:2%, J:5% | - | - | 200, 400 | 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), 11M (200), 1.1M10M (400) | G:2%, J:5% | 150V | 200V | 200, 400 | 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), 15.6M (200), 6.2M10M (400), 6.2M22M (400) | G:2%, J:5% | 200V | 400V | 200, 400 | TP: 10,000, TD: 5,000 |
| 2E (3225/1210) | 3.20.2 x 2.60.2 x 0.4+0.2-0.1 x 0.60.1 | 15.5 | 0.5W | -55+155 | 105.6M (200), 15.6M (200), 6.2M10M (400) | G:2%, J:5% | - | - | 200, 400 | TP: 5,000, TD: 4,000 |
| W2H (5025/2010) | 5.00.2 x 2.50.2 x 0.650.15 x 0.60.1 | 24.3 | 0.75W | -55+155 | 105.6M (200), 15.6M (200), 6.2M22M (400) | G:2%, J:5% | - | - | 200, 400 | TD: 4,000 |
| W3A (6432/2512) | 6.30.2 x 3.10.2 x 0.4+0.2-0.1 x 0.60.1 | 37.1 | 1.0W | -55+155 | 105.6M (200), 15.6M (200), 6.2M22M (400) | G:2%, J:5% | 200V | 400V | 200, 400 | TD: 4,000 |
| W3A2 (6432/2512) | 6.30.2 x 3.10.2 x 0.4+0.2-0.1 x 0.60.1 | 37.1 | 2.0W | -55+95 | 105.6M (200), 15.6M (200), 6.2M22M (400) | G:2%, J:5% | 200V | 400V | 200, 400 | TD: 4,000 |
Note: "AT" variants exist for some sizes with different dimensions (e.g., 1005/0402 AT). Refer to the original datasheet for complete details.
Packaging Options: TX (Embossed Tape, 1mm pitch), TBL/TCM (Paper Tape, 2mm pitch), TPL/TP (Paper Tape, 2mm pitch), TD (Paper Tape, 4mm pitch), TE (Embossed Tape, 4mm pitch), BK (Bulk).
Terminal Surface Material: T: Sn, G: Au*3 (L: Sn/Pb*4). Performance: Blank (Standard), A: High Heat Shock Resistance*2.
*1: "d" dimension differs for RK73B 2H, 3A, 3A2.
*2: High Heat Shock Resistance (HS) applies to terminal surface material T for 1E, 1J, 2A, 2B. Resistance value not marked.
*3: Gold-plated electrode products apply to 1E, 1J, 2A (101M). Consult for different specifications.
*4: 1F, 1H, W2H, W3A, W3A2 only apply to terminal surface material T. Lead-free products are standard.
For details on environmental load substances (beyond EU-RoHS), please contact us.
Tape details refer to Appendix C at the end of the volume.
Usage Precautions:
- The base material of chip resistors is alumina. Due to different thermal expansion coefficients from the mounting substrate, solder at the joint may crack under repeated thermal stress. Larger sizes (W2H/W3A/W3A2) are more prone to cracking due to greater thermal expansion and self-heating. Careful design is required for applications with significant environmental temperature fluctuations or repeated load ON/OFF cycles.
- RK73B 1F resistors can be damaged by static electricity during equipment assembly.
Performance Test Data:
| Test Item | Standard Value | Guaranteed Value | Representative Value | Test Method |
|---|---|---|---|---|
| Resistance Value | Within allowable tolerance | - | 25 | - |
| Temperature Coefficient of Resistance | Within specified value | - | +25/-55, +25/+125 | - |
| Overload (Short Time) | 2 (1F), 0.5 (others) | - | - | Apply 2.5x rated voltage for 5 sec (2x for 1E, 2B, W3A2) |
| Soldering Heat Resistance | 1 (10R1M), 3 (R10, R1M) | 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), 1.5 (1F), 1 (others) | 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: See original document for graphical representation of power derating based on ambient and terminal temperatures.
Temperature Rise Data: See original document for graphical representation of temperature rise.
Single Pulse Limiting Power Curves: See original document for graphical representation of single pulse limiting power.
Specifications are subject to change without notice. Please confirm with the latest specifications before ordering and use.
For applications involving human safety or significant loss, please contact us prior to use.
Website: www.koaglobal.com
2403141437_KOA-RK73B1JTTD181J_C171724.pdf
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