feat: add sc70 footprint as JEDEC MO-203 / SOT-323 alias with correct defaults

src/fn/index.ts

@@ -81,3 +81,4 @@ export { sot343 } from "./sot343"
 export { m2host } from "./m2host"
 export { mountedpcbmodule } from "./mountedpcbmodule"
 export { to92l } from "./to92l"
+export { sc70 } from "./sc70"

src/fn/sc70.ts

@@ -0,0 +1,27 @@
+import type { AnyCircuitElement } from "circuit-json"
+import type { z } from "zod"
+import { sot323, type sot323_def } from "./sot323"
+
+/**
+ * SC-70 footprint — JEDEC MO-203 / SOT-323 package (same physical package).
+ *
+ * Defaults match the SC-70-3 (3-pin) package:
+ *   body: 2.0mm × 1.25mm, pitch: 0.65mm
+ *
+ * The SC-70 name is an alias for SOT-323; the underlying layout is identical.
+ * Use `sc70` or `sc70_3` for the 3-pin variant.
+ */
+export const sc70 = (
+  raw_params: z.input<typeof sot323_def> & { string?: string },
+): { circuitJson: AnyCircuitElement[]; parameters: any } => {
+  // Apply SC-70 defaults (JEDEC MO-203 / KiCad SOT-323 dimensions)
+  const params = {
+    w: "2.0mm",
+    h: "1.25mm",
+    pl: "0.6mm",
+    pw: "0.35mm",
+    p: "1.1mm",
+    ...raw_params,
+  }
+  return sot323(params)
+}

src/footprinter.ts

@@ -257,6 +257,7 @@ export type Footprinter = {
   solderjumper: (
     num_pins?: number,
   ) => FootprinterParamsBuilder<"bridged" | "p" | "pw" | "ph">
+  sc70: () => FootprinterParamsBuilder<"w" | "h" | "p" | "pl" | "pw">
 
   params: () => any
   /** @deprecated use circuitJson() instead */

tests/sc70.test.ts

@@ -0,0 +1,23 @@
+import { test, expect } from "bun:test"
+import { convertCircuitJsonToPcbSvg } from "circuit-to-svg"
+import { fp } from "../src/footprinter"
+
+test("sc70", () => {
+  const circuitJson = fp.string("sc70").circuitJson()
+  const svgContent = convertCircuitJsonToPcbSvg(circuitJson)
+  expect(svgContent).toMatchSvgSnapshot(import.meta.path, "sc70")
+})
+
+test("sc70_3", () => {
+  const circuitJson = fp.string("sc70_3").circuitJson()
+  const svgContent = convertCircuitJsonToPcbSvg(circuitJson)
+  expect(svgContent).toMatchSvgSnapshot(import.meta.path, "sc70_3")
+})
+
+test("sc70 custom params", () => {
+  const circuitJson = fp
+    .string("sc70_w2.0mm_h1.25mm_p0.65mm")
+    .circuitJson()
+  const svgContent = convertCircuitJsonToPcbSvg(circuitJson)
+  expect(svgContent).toMatchSvgSnapshot(import.meta.path, "sc70_custom")
+})