Gold plating and 3A current rating
The 4-103186-0-27: The 15.0µin gold-on-copper-alloy mating surface supports repeated connect-disconnect cycles without the fretting corrosion that tin contacts show in low-level signal circuits.

TE Connectivity AMP Connectors AMPMODU Mod II header, breakaway, order code 4-103186-0-27, 54 positions, dual row, 0.100" (2.54mm) pitch, 3A, gold-plated mating contacts, through-hole, solder termination.
| Parameter | Value |
|---|---|
| Series | AMPMODU Mod II |
| Type | Male Pin |
| Mounting | Through Hole |
| Connector type | Header, Breakaway |
| Fastening type | Push-Pull |
| Current rating | 3A |
| Operating temperature | -65°C ~ 105°C |
| Contact material | Copper Alloy |
| Insulation color | Black |
| Insulation height | 0.090\" (2.29mm) |
| Insulation material | Thermoplastic |
| Material flammability rating | UL94 V-0 |
| Parameter | Value |
|---|---|
| Style | Board to Board or Cable |
| Package | Bulk |
| Shrouding | Unshrouded |
| Termination | Solder |
| Contact shape | Square |
| Rows | 2 |
| Pitch | 0.100\" (2.54mm) |
| Positions | 54 |
| Row spacing - mating | 0.100\" (2.54mm) |
| Contact finish - post | Tin-Lead |
| Contact length - post | 0.120\" (3.05mm) |
| Overall contact length | 0.440\" (11.18mm) |
| Contact finish - mating | Gold |
| Contact length - mating | 0.230\" (5.84mm) |
| Contact finish thickness - post | 100.0µin (2.54µm) |
| Contact finish thickness - mating | 15.0µin (0.38µm) |
The 4-103186-0-27: The 15.0µin gold-on-copper-alloy mating surface supports repeated connect-disconnect cycles without the fretting corrosion that tin contacts show in low-level signal circuits.
No pin-compatible alternative is listed in the series. The 4-103186-0-27 is a breakaway header — the 54-position count is specific to this order code; other AMPMODU Mod II breakaway headers share the 0.100" pitch and dual-row layout but differ in position count.