SATCO Lighting S9545 3W, JC LED, 5000K, G6.35 Base, 12V AC/DC

Yes. The S9545 runs on 12 volts AC or DC, so it works off either a magnetic or electronic 12V transformer as long as the fixture uses a bi-pin G6.35 socket. It draws 0.250A, which is what you need to size the transformer load. Note the location rating is damp, not wet, so keep it in a fixture that shields it from direct water.

That's exactly the swap it's built for. The S9545 is a 25W incandescent equivalent at 3 watts actual draw, in the same T4 shape with the same G6.35 bi-pin spacing as a standard JC halogen. Light output is 300 lumens at 5000K, so the color will read noticeably whiter and cooler than the warm halogen you're pulling out. If you're relamping a fixture where the halogen color is visible alongside other lamps, expect a visible difference.

Yes, it's an enclosed rated lamp, so you can install it in a sealed or gasketed fixture without voiding the lamp's rating. That matters because most low voltage bipin LEDs are not enclosed rated and cook themselves in a closed housing. Burning position is universal too, so base up, base down, or horizontal all work.

The lamp itself is dimmable, but on a 12V circuit the dimming behavior is set by the transformer and dimmer combination ahead of it, not by the bulb. If you're feeding it from an LED-compatible low voltage transformer on a matching dimmer, it will dim. Behind an old magnetic transformer on a standard incandescent dimmer, expect flicker or drop-out at the low end. The lamp draws only 0.250A, so the bigger issue in a retrofit is usually the transformer's minimum load, not the dimmer.

Damp location only. That covers a bathroom, a covered porch, or a soffit where the lamp sees humidity and condensation but not direct water. It does not cover a wet location, so an unshielded outdoor landscape head, an in-ground well light, or anywhere the lamp gets rained on or sprayed directly calls for a wet-rated lamp instead. The enclosed rating helps here, since a sealed gasketed housing is often what turns a wet exposure into a damp one for the lamp inside.

The base is a G6.35 bi-pin, which is the 6.35mm pin spacing used on JC halogen capsules, and it is a different socket from a G4 with its 4mm spacing. A G4 lamp will not seat in a G6.35 socket and the reverse is also true, so check the pin gap in the fixture before ordering. The base material is silicon, which is more forgiving than a rigid ceramic base when you're working a lamp into a tight recessed socket.

Each S9545 pulls 3 watts at 0.250A on a 12V supply, so a 60VA transformer carries about 20 lamps at full load and a 100VA carries roughly 33, before you leave headroom. Compare that to the 25 watt halogens they replace, where the same 60VA transformer topped out at two lamps. If you're relamping an existing run, you're going way under the transformer's rating, which is where the minimum-load problem on magnetic units shows up.

5000K reads as daylight white, clean and slightly blue, which is what you want in task, display, security, and shop lighting. For a residential landscape path light or a warm interior cove where the rest of the lamps are 2700K or 3000K halogen, it will look out of place. This lamp is fixed at 5000K with no CCT selection, so if you need a warmer color you need a different lamp in the same G6.35 bipin family rather than a setting on this one.

It does. Beam spread is a full 360 degrees with a clear lens, so in a fixture that relies on the lamp to light the reflector or a diffuser in every direction, the distribution stays close to the halogen capsule's. Many bipin LEDs use a one-sided board and throw light in a single hemisphere, which leaves a dark side in an open fixture. That isn't a problem here.

Average rated life is 25,000 hours. Against a JC halogen capsule, typically rated around 2,000 hours, that's roughly a ten to one difference, and it's the whole argument for relamping hard-to-reach fixtures like cove, display case, under-cabinet, and landscape heads. For an MRO or property maintenance schedule, a fixture burning 12 hours a day gets about 5.7 years out of one lamp.

Yes, the S9545 is Title 24 compliant, which is what you need for lighting in California new construction and alteration permits. It's also FCC compliant for electromagnetic interference. It is not DLC listed, so it won't qualify for utility rebate programs that require a Design Lights Consortium listing.

CRI is 80, which is standard commercial-grade color rendering. It's fine for general display, cabinet, and task lighting where you need to see product clearly. For merchandising where color fidelity sells the item, fabric, paint, cosmetics, fresh food, specifiers usually want 90 CRI or better, so an 80 CRI lamp is a compromise in those cases. At 5000K and 300 lumens it's a bright, cool, neutral light rather than a color-critical one.