Product Overview
OSRAM Decostar 51 Titan 46870 SP — 50W 12V 10° Spot GU5.3 MR16 Halogen
The OSRAM Decostar 51 Titan 46870 SP is a 50W, 12V low-voltage halogen MR16 reflector lamp with a 10° spot beam and a GU5.3 base. Its Titan-coated dichroic reflector is engineered to hold constant luminous intensity and color location for its entire 4,000-hour rated life — twice the average life of a standard dichroic MR16 — while directing up to 66% of the lamp's heat out through the back of the reflector, keeping heat-sensitive displays cool.
WATTAGE 50W 12V Low Voltage | BEAM ANGLE 10° Spot | LUMINOUS INTENSITY 12,500 cd Per manufacturer's table | COLOR TEMP 3,050K Ra=100 / CRI 100 | RATED LIFE 4,000 hrs Titan — 2x standard |
Technical Specifications
| Order Code | 46870 SP |
| Wattage | 50W |
| Voltage | 12V |
| Base | GU5.3 (Bi-Pin) |
| Beam Angle | 10° (Spot) |
| Luminous Intensity | 12,500 cd |
| Color Temperature | 3,050K |
| Color Rendering Index | Ra=100 (CRI 100) |
| Average Rated Life | 4,000 hours |
| Dimmable | Yes |
| Reflector | Titan-coated dichroic — constant intensity/color over full rated life |
| UV Filter | Yes |
| Cover | Closed face, clear cover glass — approved for open luminaires per IEC 60598-1 |
| Diameter | 50.7mm |
| Overall Length (MOL) | 46mm (per current Osram catalog; prior ADL product data listed 44.5mm — flagged, not silently overwritten) |
| Packaging | 20 per the manufacturer's catalog table; prior ADL product data for this line said "Sold 10/Case" — both noted, confirm actual case pack with Osram/distributor before reordering cartons |
| UPC/EAN | 4050300428758 |
Product Overview
DECOSTAR 51 Titan lamps are built for professional applications where light quality can't drift over time. A specialized reflector coating keeps luminous intensity and color location constant throughout the lamp's full 4,000-hour average life — double the life of many standard dichroic reflector lamps — so a fixture relamped months apart still matches.
The 46870 SP pairs a 10° spot beam with 12,500 candela of luminous intensity at 50W, delivering a Ra=100 (perfect color rendering) light at 3,050K. Its dichroic reflector redirects up to 66% of the lamp's heat out through the back of the fixture rather than into the beam, making it well suited to lighting heat- and UV-sensitive merchandise, artwork, and textiles — the integrated UV filter adds further protection against fading. The lamp is fully dimmable and its closed-face clear cover glass makes it approved for use in open luminaires per IEC 60598-1.
Compatible Applications
- Luxury retail: jewelry, high-end fashion, and boutique displays
- Art galleries and museums — heat- and UV-sensitive exhibits
- Hospitality — warm accent lighting in restaurants and hotels
- Residential — recessed downlights and track lighting for architectural accents
Before Ordering – Verify
- Confirm beam angle (10° Spot) matches your fixture's optical requirement — Decostar 51 Titan is offered in 10°, 24°, 36°, and 60° variants at this wattage.
- Confirm wattage (50W) and voltage (12V) match your transformer and fixture rating before ordering.
- This lamp requires a compatible 12V magnetic or electronic transformer — confirm transformer compatibility before ordering.
- Overall length (MOL) is documented as 46mm in the current manufacturer catalog, differing from 44.5mm in prior ADL product data — confirm fixture clearance if exact dimension is critical.
Safety and Handling Guidelines
- Allow lamp to cool completely before handling or relamping.
- Do not touch the glass with bare hands — skin oils can cause premature lamp failure under heat.
- Disconnect power at the fixture before installing or removing this lamp.
- Install only in fixtures rated for this lamp's wattage and voltage.
- Cover glass is approved for open luminaires per IEC 60598-1; confirm compatibility with your specific fixture design.
Compliance
- Manufactured by OSRAM.
- Approved for use in open luminaires per IEC 60598-1.
- UV filter integrated.
Ordering Information
- Order Code: 46870 SP
- UPC/EAN: 4050300428758
- Packaging: see Technical Specifications note above — confirm case pack before ordering.
- Sold individually unless otherwise noted on the product page.
For wholesale pricing, bulk availability, or help confirming the correct replacement lamp, contact ADL Supply at 1-800-235-3489.
