RC0603FR-073K65L

YAGEO RC0603FR-073K65L: Thick film chip resistor 3.65 kOhm +/-1 %, 1/10 W, 75 V, 0603 (1608 metric). A general purpose thick film chip resistor from YAGEO's RC_L series.

Key specifications

All page numbers refer to the datasheet PDF in docs/.

Voltage rating

YAGEO rates the continuous working voltage as sqrt(P x R) or the maximum working voltage, whichever is less (p.7). For this value power governs: sqrt(P x R) = sqrt(0.1 W x 3.65 kOhm) = 19.1 V continuous, below the 0603 size's 75 V maximum working voltage. The maximum overload voltage is 150 V; the short time overload test applies 48 V for 5 s (p.9).

Notes

• Mouser lists the part as 'RoHS Compliant By Exemption'; the datasheet (p.2) says Pb-glass in electrodes, resistor element and glass is exempted.

Ordering

Stock figures are a snapshot from the Adom parts search on 2026-10-21; check the distributor before ordering. Packaging code R with reel code 07 is a 7 inch paper tape reel of 5,000 pieces (p.7 Table 4).

Manufacturer and resources

Pins

A resistor has no polarity and no pin 1 orientation: either terminal may face either way.

Marking

YAGEO marks RC0603 1 % parts with the three-character EIA-96 code (p.3, Fig. 3). For 3.65 kOhm the code is 55B: EIA-96 code: 55 = 365, B = x10. The code is printed light on the black top coat and may read either way round on a board.

Land pattern: KiCad footprint vs YAGEO

Land pattern

The footprint is KiCad's standard `R_0603_1608Metric`, and this guide lays its pads over YAGEO's recommended reflow land, at true scale. KiCad's pads are shorter and wider than YAGEO's nominal land, and the guide shows by how much. Use it to decide whether to keep the KiCad pads or change them to YAGEO's numbers before layout. The comparison, with the numbers

3D model

No YAGEO STEP for this exact part number could be downloaded by plain HTTP: YAGEO's product pages build their CAD links in the browser and expose no direct STEP link. The page therefore uses KiCad's library model for the package, R_0603_1608Metric.step, with its bytes unchanged, renamed RC0603FR-073K65L.step, after checking it against the datasheet table (next section). Because the real part carries the marking 55B, a display copy RC0603FR-073K65L-marked.step adds that code as a flat solid group (Adom.LaserEtch) 5 um above the top coat, made with the step2glb service's laser-etch endpoint; the body is untouched. The GLB, the hero and the high and medium board LODs come from the marked copy; the unmarked STEP stays the board CAD file.

The page viewer shows rc0603fr-073k65l-hero.glb: the clean model plus nonphysical reference artwork drawn under it to the adom-hero standard (adom/component-hero): the footprint's pads as teal dashed outlines at 50 % opacity, its silkscreen at 70 % transparency and the pad numbers 1 and 2 (the terminals have no names). The part is non-polar, so no pin-1 dot is added. The artwork never goes into the STEP, package-reference.glb or the board LODs.

Model checked against the datasheet

The KiCad model was rendered in orthographic top, bottom, side and end views at true scale and laid over a drawing made at the same scale from the printed table (nominal outline, tolerance limits, allowed terminal band). Every dimension is inside the printed range: L 1.600 mm (datasheet 1.50 to 1.70), W 0.800 mm (datasheet 0.70 to 0.90), T/H 0.450 mm (datasheet 0.35 to 0.55), I1 (terminal on top) 0.255 mm (datasheet 0.10 to 0.40), I2 (terminal on bottom) 0.255 mm (datasheet 0.10 to 0.40). The model is Z-up, seated on z = 0, centred on the footprint origin, long axis on X.

Source: YAGEO General Purpose Chip Resistors RC_L series, product specification V.14, Nov. 14, 2025, p.4 Table 1, RC0603: L 1.60 +/-0.10, W 0.80 +/-0.10, H 0.45 +/-0.10, I1 0.25 +/-0.15, I2 0.25 +/-0.15 (mm).

Board levels of detail

Clean board-use GLBs (no footprint pads, outlines, labels or silkscreen) in four levels, all in the same Z-up, metre, footprint-origin pose as the STEP. The marking 55B shows in high and medium and is left out of low and super-low, where it cannot be read. Previews are rendered from each GLB.

CAD files

Datasheet figures

The pages this record cites, cropped from the PDFs:

Sources and license

• YAGEO: YAGEO General Purpose Chip Resistors RC_L series, product specification V.14, Nov. 14, 2025 (https://yageogroup.com/content/datasheet/asset/file/PYU-RC_GROUP_51_ROHS_L)
• YAGEO: YAGEO Chip Resistors Mounting, product specification V.10, Feb. 13, 2018 (https://yageogroup.com/content/Resource%20Library/Product%20Guide-Catalog/yageo_PYu-R_Mount_10_19050818_343.pdf)
• KiCad libraries: Resistor_SMD.pretty/R_0603_1608Metric.kicad_mod, Resistor_SMD.3dshapes/R_0603_1608Metric.step
• Distributor numbers: Mouser, DigiKey and JLCPCB/LCSC through the Adom parts search, 2026-10-21

Original Adom content is CC-BY-4.0. The KiCad footprint and 3D files keep their upstream license (CC-BY-SA 4.0 with the KiCad library exception) and the PDFs remain YAGEO's documents; see LICENSE. provenance.json records every source and file hash; the scripts that built the checks are in provenance/tools/.

This is a catalog record for the part, not a manufacturing approval: check YAGEO's current datasheet for your design.