3-circuit member of the MTA-100 line
The 644861-3: Tin-lead mating contacts rated 250 VAC; the through-hole solder termination and friction lock suit it for general-purpose wire-to-board connections.

TE Connectivity AMP Connectors MTA-100 header, order code 644861-3, 3 positions, single row, 0.100" (2.54 mm) pitch, 250 VAC, tin-lead mating contacts, through-hole, solder termination.
| Parameter | Value |
|---|---|
| Series | MTA-100 |
| Type | Male Pin |
| Mounting | Through Hole |
| Connector type | Header |
| Fastening type | Friction Lock |
| Voltage rating | 250VAC |
| Current rating | Varies by Wire Gauge |
| Operating temperature | -55°C ~ 105°C |
| Contact material | Copper Alloy |
| Insulation color | Black |
| Insulation height | 0.410\" (10.41mm) |
| Insulation material | Polyester |
| Parameter | Value |
|---|---|
| Material flammability rating | UL94 V-0 |
| Style | Board to Cable/Wire |
| Package | Bulk |
| Shrouding | Shrouded - 4 Wall |
| Termination | Solder |
| Applications | General Purpose |
| Contact shape | Square |
| Rows | 1 |
| Pitch | 0.100\" (2.54mm) |
| Positions | 3 |
| Contact finish - post | Tin-Lead |
| Contact length - post | 0.140\" (3.56mm) |
| Overall contact length | 0.440\" (11.18mm) |
| Contact finish - mating | Tin-Lead |
| Contact length - mating | 0.200\" (5.08mm) |
The 644861-3: Tin-lead mating contacts rated 250 VAC; the through-hole solder termination and friction lock suit it for general-purpose wire-to-board connections.
The 644861-3 is a Board to Cable/Wire header — a shrouded single-row male pin connector with a friction lock.