Osram 64617 75W 12V Photo-Optic Lamp

The Osram 64617 Xenophot 75W 12V MR11 is a precision low-voltage halogen dichroic reflector lamp engineered for professional audio/visual studio, medical instrument, and projection applications requiring a tight focal length and controlled beam in a compact 35mm MR11 format. Delivering focused output through a dichroic cool-beam reflector with a 26mm focal length, this Germany-manufactured lamp uses a specialized G5.3-4.8 bi-pin base, operates at 12V, and provides a 25-hour calibrated service life in approved enclosed optical fixture assemblies.

ADL Supply Expert Application & Replacement Guide

The Osram 64617 Xenophot is primarily used by audio/visual studio equipment technicians, biomedical instrument service personnel, and projection system engineers as the replacement lamp in professional AV studio fixtures, medical diagnostic and dental instrumentation, and precision projection optics where the compact 35mm MR11 format, 26mm focal length, and dichroic cool-beam reflector are the authoritative equipment specifications. The G5.3-4.8 bi-pin base uses 5.3mm pin spacing with 4.8mm pin diameter pins — this is a larger-diameter pin format than the standard GX5.3 (2mm pins) used on MR16 halogen lamps and is not interchangeable with GX5.3 or GY5.3 sockets. Confirm the fixture's lamp socket is specifically labeled G5.3-4.8 before ordering. The burn position designation p90/p15 in Osram notation indicates this lamp is approved for vertical base-up (p90 = perpendicular, 90° from horizontal) and up to 15° from vertical — horizontal mounting is not approved and will affect arc/filament orientation and lamp life. The 25-hour calibrated service life and 26mm focal length are precision parameters; equipment facilities should track runtime hours and replace on a scheduled interval to maintain consistent optical output.

Before You Order

Detailed Product Specifications

• Brand: Osram
• Product Line Series: Xenophot Precision Halogen MR11 — Photo-Optic / Medical / AV
• Osram Order Code: 64617
• EAN-13: 4050300231211
• LIF Code: M/117
• Cross-Reference: Philips #14513 Blue
• Core Technology: Tungsten-Halogen MR11 Dichroic Reflector — Cool Beam
• Wattage: 75W
• Operating Voltage: 12V Low Voltage
• Base Type Configuration: G5.3-4.8 Bi-Pin (5.3mm pin spacing, 4.8mm pin diameter)
• Focal Length: 26mm
• Maximum Overall Length (MOL): 35.5mm (1.40 inches)
• Reflector Diameter: 35mm (1.38 inches) — MR11
• Rated Average Lifespan: 25 Hours (Calibrated)
• Burn Position: p90 (vertical base-up) and p15 (within 15° of vertical) — horizontal not approved
• Fixture Requirement: Approved Enclosed Halogen Fixture Only
• Country of Origin: Germany
• Mercury Content: None — standard e-waste disposal applies

Operation, Safety & Mounting Compliance

G5.3-4.8 Base, Burn Position & Optical Alignment

The G5.3-4.8 base is a specialized precision lamp cap with larger-diameter pins (4.8mm) than the standard GX5.3 format (2mm), designed to provide more secure mechanical retention and consistent electrical contact in high-vibration optical instrument applications. The pin spacing is the same 5.3mm as GX5.3, but the physically larger pin diameter prevents incorrect installation in a standard MR16 socket. The p90/p15 burn position restriction means this lamp must be mounted with the base pointing upward (vertical) — at 90° or within 15° of the vertical axis. Horizontal mounting is not permitted and will cause the filament to operate outside its designed orientation, affecting both lamp life and the precision optical alignment of the filament image with the fixture's 26mm focal plane. This is a dichroic cool-beam reflector — infrared heat is directed rearward through the reflector rather than forward through the beam, reducing forward heat transmission into sensitive optical or biological materials.

Quartz Handling, Enclosed Fixture Requirement & Disposal

This lamp must be installed exclusively in an approved enclosed halogen optical fixture — open-face operation is not permitted. Never handle the quartz envelope or reflector body with bare skin — skin oils create localized hot spots that accelerate premature envelope failure on this precision short-life lamp. Always relamp using clean cotton gloves or a lint-free cloth. Allow a minimum 15-minute cool-down before relamping. This lamp contains no mercury; standard electronic waste disposal applies.

Industry Cross-Reference Data

• Philips: 14513 Blue (listed cross-reference per source documentation)
• Ushio: Equivalent 75W 12V G5.3-4.8 MR11 dichroic photo-optic halogen — confirm LIF code and focal length match
• GE Lighting: Equivalent 75W 12V G5.3-4.8 MR11 precision optical halogen — confirm M/117 LIF code
• Legacy Cross-Reference: Direct replacement for Osram Xenophot 75W 12V G5.3-4.8 MR11 lamp positions in AV studio, medical, dental, and precision projection optical instrument fixture hardware

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