# Chip resistor array Vishay's thick film chip resistor arrays with convex terminals: CRA04S (0402 elements), CRA06E and CRA06S (0603) and CRA12E and CRA12S (1206), with 4 to 10 terminals. Each array holds terminals / 2 isolated resistors. The array is centred on the origin with the board on the XY plane and its length along X. It is the ceramic body, the protective coating on top, and the terminals along both long sides. Each terminal wraps over the side from the top to the bottom and is its own solid. Pin 1 is at the -X end of the -Y side. - **S version:** square corners. The end terminals are wider (A*) and reach the body's ends. - **E version:** scalloped corners. Every terminal is A wide on the pitch. ## Source Vishay data sheets, each table "DIMENSIONS [in millimeters]". These are nominal values; their tolerances follow the table. - CRA04S: "CRA04S Thick Film Resistor Array", document number 31043, revision 13-Oct-08, page 249. Copy hosted by Chipsmall, . The sheet calls A* "A1". - CRA06E and CRA06S: "CRA06E and S Thick Film, Resistor Array", document number 31002, revision 16-Aug-05, page 7. Copy hosted by LCSC (szlcsc), . The sheet calls A* "A1". - CRA12E and CRA12S: "CRA12E, CRA12S Thick Film Resistor Array", document number 31003, revision 10-Dec-10, page 250. Copy hosted by Chipsmall, . | Array | Terminals | L | A | A* | B | B* | P | T | W | |---|---|---|---|---|---|---|---|---|---| | CRA04S | 4 | 1.0 | – | 0.33 | 0.15 | 0.25 | 0.65 | 0.35 | 1.0 | | CRA04S | 8 | 2.0 | 0.30 | 0.4 | 0.15 | 0.25 | 0.50 | 0.45 | 1.0 | | CRA06S | 4 | 1.6 | 0.38 | 0.61 | 0.3 | 0.3 | 0.8 | 0.5 | 1.5 | | CRA06S | 8 | 3.2 | 0.38 | 0.61 | 0.3 | 0.3 | 0.8 | 0.5 | 1.5 | | CRA06E | 8 | 3.2 | 0.38 | – | 0.3 | 0.3 | 0.8 | 0.5 | 1.5 | | CRA12E | 8 | 5.08 | 0.79 | – | 0.51 | 0.38 | 1.27 | 0.55 | 3.05 | | CRA12E | 10 | 6.40 | 0.79 | – | 0.51 | 0.38 | 1.27 | 0.55 | 3.05 | | CRA12S | 10 | 6.40 | 0.79 | 0.89 | 0.51 | 0.38 | 1.27 | 0.55 | 3.05 | L is the length, W the width over the terminals, T the height, and P the terminal pitch. A is the terminal width, and A* the width of a square-cornered end terminal. B is the terminal's length on the top, and B* its length on the bottom. The terminals sit on the pitch, centred on the body. The 4-terminal CRA04S has only end terminals. **Proportions, stated plainly.** The drawings show these but don't dimension them: - The terminals' metal is 0.03 thick. It wraps a ceramic body that is 0.03 smaller on each side, top and bottom, so the overall size is the sheet's L x W x T. - The black coating on top is 0.03 thick. It stops 0.05 W short of the ends and of the terminals' top pads. - The terminals' convex bulge and the E version's scalloped corners aren't modelled. The body's ends are square. **Materials.** The sheets say "a high grade ceramic" body, "covered by a protective coating", with terminals of tin on a nickel barrier. The body is alumina, the coating ptfe (the nearest density in the list to an epoxy-like layer), and the terminals tin. The sheets give no weight. ## Catalogue models The old catalogue's `R_Array_Convex_x` entries have no models to measure. Each names a convex-terminal array of n resistors of an EIA size. Each maps to Vishay's convex array of that size and count: | Entry | Array | |---|---| | `R_Array_Convex_2x0402` | CRA04S, 4 terminals | | `R_Array_Convex_4x0402` | CRA04S, 8 terminals | | `R_Array_Convex_2x0603` | CRA06S, 4 terminals | | `R_Array_Convex_4x0603` | CRA06S, 8 terminals | | `R_Array_Convex_4x1206` | CRA12E, 8 terminals | | `R_Array_Convex_5x1206` | CRA12E, 10 terminals | `R_Array_Convex_2x1206` and `R_Array_Convex_5x0603` aren't offered, because these sheets give no such count: CRA12 comes with 8 or 10 terminals, and CRA06 with 4 or 8. The concave arrays, `R_Array_Convex_8x0602` and the other resistors in the family are read elsewhere or not yet; see `COVERAGE.md`.