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PJ-102A (DC barrel jack)

Public Unreviewed

by Ray

CUI 2.0 mm DC barrel jack, right-angle THT. 24 Vdc, 2.5 A, switched. Datasheet-verified.

componentconnectorpower-jackbarrel-jackthrough-holecui-devices
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PJ-102A

CUI Devices · DC power jack · Right-angle THT (2.0 mm pin)

DC power jack with a 2.0 mm center pin (5.5 mm outer barrel), right-angle through-hole mount, from CUI Devices. Rated 24 Vdc / 2.5 A with 30 mohm contact resistance. The switched contact (terminal 2) is normally shorted to the tip and opens when a plug is inserted, so you can detect external power or auto-disconnect a battery. The default DC input jack for boards powered from a wall adapter.

Pinout

Pin Name Type Function
1 TIP passive Center-pin contact (Ø2.0 mm tip). Connects to the center conductor of the mating DC plug; typically the positive supply node for center-positive adapters. Rated 24 Vdc / 2.5 A; copper with nickel plating.
2 SW passive Normally-closed switch contact. Mechanically shorted to terminal 3 (sleeve) when no plug is inserted, and opens when a plug is mated. Commonly used to auto-disconnect a battery when an external adapter is plugged in. Copper alloy with silver plating.
3 SLEEVE passive Outer sleeve/ring contact of the barrel jack; typically the ground/return for center-positive DC adapters. Mates with the outer body of the plug. Brass with silver plating.

Key specifications

Parameter Value
Type DC power jack (barrel), switched
Center pin 2.0 mm
Voltage rating 24 Vdc
Current rating 2.5 A
Contact resistance 30 mΩ
Switch Normally-closed (opens on insertion)
Mounting Right-angle through-hole

Ordering variants

Same part, different packaging or reel option.

  • PJ-102A (right-angle THT, bulk)

CAD (KiCad official)

  • Symbol: Connector:Barrel_Jack_Switch
  • Footprint: Connector_BarrelJack:BarrelJack_CUI_PJ-102AH_Horizontal
  • 3D model: generic barrel jack (KiCad lacks a PJ-102AH-specific model)

Provenance

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

  • Datasheet: CUI Devices datasheet (3 pp, sha256 3d68931e9049c6bd, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude) — every pin and dimension is cited to a datasheet page; refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF