SATCO Lighting S9544 3W, JC LED, 3000K, G6.35 Base, 12V AC/DC

That's the swap it's built for. The S9544 is a 3W JC-style LED with a G6.35 bi-pin base running on 12 volts AC or DC, and Satco rates it as a 25W incandescent equivalent at 300 lumens. Two things to check on your fixture: the socket must be G6.35 bi-pin (not the smaller GY6.35 spacing variants some low-voltage fixtures use under other names), and the transformer has to supply 12V. Current draw is 0.250A, so a magnetic or electronic transformer sized for the old 25W halogen has plenty of headroom, though very low-wattage LED loads can fall under the minimum load of some electronic transformers.

It's an enclosed rated lamp, so a closed or sealed fixture is fine. Location rating is damp, which covers covered exterior soffits, porches, bathrooms, and coolers, but not direct wet exposure like an uncovered outdoor fixture that takes rain on the lamp.

Either one. It runs on 12 volts AC or DC, drawing 0.250A, so it works off a standard low-voltage lighting transformer or directly off a 12V DC source such as a battery bank or solar controller. Do not put it on line voltage.

Dimmable, yes. Color is 3000K warm white with a CRI of 80, and it is not a color-selectable lamp, so 3000K is what you get. On a dimming system, the controlling factor is usually the 12V transformer more than the lamp: a 3W load drawing 0.250A is a small load for a dimmer rated around older halogen wattages.

Burning position is universal, so base up, base down, or horizontal all work. That matters in low-voltage display cases and under-cabinet pucks where the socket orientation is whatever the fixture dictates. Light output is a full 360 degree spread with a clear lens, so it throws in all directions rather than a controlled beam.

Yes, the S9544 is listed as Title 24 compliant, and it's FCC compliant. Worth noting for spec work that it is not DLC listed, so it won't qualify for utility rebate programs that require a DesignLights Consortium listing.

Rated at 25,000 average hours. For a property manager relamping low-voltage display or landscape fixtures, that's the whole argument: a JC halogen capsule in the same socket typically runs a couple thousand hours. The base is silicon, which also means no hot glass pin base to handle on service calls.

The S9544 is a single configuration: 3000K warm white, clear lens finish. There's no frosted version and no selectable color temperature on this lamp, so if the job calls for 2700K or a diffused capsule you need a different Satco part number.