Schlage Electronics SPDT Magnetic Switch (0.3 amps @ 30 VDC) for Wood Door and Metal Frame

That is exactly the pairing it is built for. The 679-05WD is specified for wood doors with metal frames, so the switch half goes in the door and the magnet half in the frame (or vice versa). If your opening is a hollow metal door rather than a wood one, order the matching hollow metal version instead, since the model is application specific.

Contacts are rated 0.3 amps at 30 VDC. That is a signal-level rating, not a load rating: it is sized to feed a monitoring input on an access control panel or alarm board. Do not run a strike, maglock, or any door-powering current through it. If you need the switch to break a real load, drive a relay with it and switch the load on the relay contacts.

The 679-05WD carries a UL10C/CAN-ULC-S104 listing, which is the fire door test standard, so it is a concealed switch intended for use on fire rated openings. Mortising a non-listed switch into a labeled door is what gets an assembly written up on inspection, so this is the detail that matters for institutional and healthcare work.

The RCI 960 Series SPDT Switch for Second Position Control is the SPDT alternative to look at. Both are single-pole double-throw switches, so both give a control panel a common contact plus a normally-open and a normally-closed contact off one switch body. The Schlage Electronics 679-05WD is a concealed SPDT magnetic switch built for wood doors with metal frames, rated 0.3 amps at 30 VDC and carrying a UL10C/CAN-ULC-S104 listing. The RCI unit is a second position control switch in the 960 series. Match the one whose door and frame combination and signal role fit the opening you are wiring.

They are both SPDT switches, but they are not doing the same job on the opening. The 679-05WD is a door position switch: it detects whether the door is open or closed relative to its frame and relays that status to a control panel. The RCI 960 Series SPDT switch is described as a second position control switch, which is a different signal role in the 960 series. If what you need is open or closed door status reported to a panel on a wood door in a metal frame, specify the 679-05WD rather than assuming SPDT alone makes the two interchangeable.

It tells the panel whether the opening is open or closed. The 679 series magnetic switch senses the door's position relative to its frame and relays that state back to a control panel, which is what drives door-forced-open and door-held-open alarms, relocks after a valid card read, and status on a monitoring screen. Without one, the panel knows a credential was presented but has no idea whether the door ever shut.

Concealed. Both halves recess into the door edge and the frame, so nothing shows when the door is shut and there is nothing exposed for a tenant or a cart to knock loose. Plan for drilling or mortising both the door edge and the frame stop at install; a surface mount switch is the choice when you cannot cut into an existing door.

SPDT gives you both a normally open and a normally closed contact off the same switch, sharing a common. That means one device can feed two things, a door position input on the access panel and a separate alarm or interlock circuit, and it lets you wire either polarity the panel expects without swapping hardware. The 679-05WD is SPDT, which is why it drops into panels that want NC supervision and ones that want NO alike.

For a second position contact, the RCI 960 Series SPDT switch is the cross-brand equivalent, also single pole double throw. On a pair of doors you need one switch per leaf regardless of brand, each reporting its own leaf back to the panel, because a single contact on the active leaf will report the opening secure while the inactive leaf stands open.