Found 5 alternatives for 2178186-3 by TE Connectivity AMP Connectors. Blade Type Power Connectors Housings — Tray.
CONN HSG PLUG 2POS 7.80MM BLACK
CABLE PLUG WITHOUT DETECTION CON
2X2 POWER UNSHIELDED CABLE-PLUG
GUARDIAN II RCPT HSG 6AWG PBT 2C
CONN HSG RCPT 2POS 7.80MM