OSRAM Sylvania · Electronic Components
MS400/BU-ONLY
400W HIGH OUTPUT, POSITION ORIENTED METAL HALIDE LAMP, CLEAR, BASE UP BURN WITHIN 15DEG
Part NumberMS400/BU-ONLY
ManufacturerOSRAM Sylvania
AvailabilityAvailable to order — request a quote
Specifications
NSN6240-01-344-6990 (NSN)
Federal Item NameLAMP,METAL HALIDE
Overall Length11.500 INCHES NOMINAL11.500 INCHES NOMINAL
Special FeaturesENERGY SAVER
Average Life Rating In Hours20000.0
Base StyleMOGUL SCREW
Environmental Attribute CodeCOMPACT FLUORESCENT LAMP (CFL) LIGHT BULBS - ENERGY STAR-LIGHTING - ENERGY EFFICIENT PRODUCTS
Wattage Rating400.000 WATTS
Bulb Light Transmission CharacteriTRANSLUCENT
Bulb StyleBT (BULGED TUBULAR)
Bulb DesignatorBT-37
Criticality Code JustificationFEAT
Federal Supply Class6240 — Electric Lamps
RH Electronics, Inc. — independent stocking distributor since 1982.
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Frequently asked
Is MS400/BU-ONLY available?
We can source MS400/BU-ONLY even if it isn't in our active stock list. As an independent distributor we reach inventory outside the franchise channel — including hard-to-find and obsolete parts. Send us a quote request.
Is MS400/BU-ONLY by OSRAM Sylvania obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If MS400/BU-ONLY has been discontinued, we can often source remaining stock or qualified alternates. Contact us with your quantity and target date.
How does RH Electronics verify parts like MS400/BU-ONLY?
Every incoming shipment is inspected under our ISO 9001:2015 quality system — documentation, markings, and construction checked against known-good references. For deeper analysis, we direct work through accredited independent labs. We've been an ERAI member since 1998 and a GIDEP participant.
Can you find a cross-reference or alternate for MS400/BU-ONLY?
Yes. Our team reads part numbers the way they were designed — decoding family, speed, temperature grade, package, and reliability level — to identify acceptable alternates when the exact part isn't available. Submit a quote request and we'll advise.