This is a two pin, locking style connector with "AMP" molded into the front edge; there is also a "P". Material is nylon or similar and the pins are pushed in from the rear like Molex connectors. What is "unusual" is the D shaped profile of the "nose" - close but not compatible with other two pin connectors I can easily obtain :(

AMP/Tyco never got back to me and our usual distributors are clueless. We have a few thousand machines in service with 24 volt power supplies that use this connector (manufacturer of the power supplies is HIPRO - now under new ownership - also not communicating)

Have spent a week trawling through connector catalogs, waited a couple of weeks for Tyco and the power supply folks to get back to me... a bit frustrating.

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Universal Mate-n-Lok –  Michael Karas Aug 13 at 3:23

+1. If EE.SE could have its own badges, we would have a badge connectorologist. It could be awarded for a certain number of upvotes (and/or accepted answers) in questions tagged connector and identification. –  Nick Alexeev Aug 13 at 3:51