# CPC1972G

**Littelfuse IXYS** · Solid State Relays (Triac Output) · DIP-6

CPC1972G from Littelfuse IXYS, in a DIP-6. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | LED+ | input | LED anode (positive) input. Forward-biased with typical IF = 5 mA (VF ~1.2 V) to activate the AC output. Absolute maximum input current 50 mA continuous. |
| 2 | LED- | input | LED cathode (negative) input. Reference return for the control-side LED; maximum reverse input voltage 5 V. |
| 3 | NC | unconnected | No internal connection. Leave unconnected or tie to non-critical net. |
| 4 | AC_LOAD | passive | AC load output terminal (SCR output). Bidirectional AC switch terminal, rated 550 Vrms operating / 800 Vp blocking, 250 mArms continuous load current, 3 Vrms on-state drop. Pair with pin 6 to switch the AC load. |
| 5 | NC | unconnected | No internal connection. Leave unconnected or tie to non-critical net. |
| 6 | AC_LOAD | passive | AC load output terminal (SCR output). Bidirectional AC switch terminal paired with pin 4; zero-cross switching keeps first-half-cycle turn-on <=20 V to minimize transients. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Littelfuse IXYS |
| Package | DIP-6 |
| Category | Optoisolators |
| Pins | 6 |

## Ordering variants

Same part, different packaging or reel option.

- `CPC1972GG`
- `CPC1972GGS`
- `CPC1972GGSTR`

## CAD (KiCad official)

- Symbol: `CPC1972G`
- Footprint: `Package_DIP:DIP-6_W7.62mm`
- 3D model: DIP-6 (KiCad packages3D, STEP)
- 3D model files: `cpc1972g-etched.step` / `cpc1972g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cpc1972g.step` / `cpc1972g.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Littelfuse IXYS datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8600688253418946560) (7 pp, sha256 `eabcfb8ce937e546`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/cpc1972g-datasheet.pdf)