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Ushio MHL-33LY — UV exposure lamp replacement

Metal-halide (long-arc) lamp for PCB, screen-printing and plate exposure units, 240 mm, iron-doped (Fe). Also listed as Ushio 5000106, BLV 25440741 and 9 more part numbers.

Power6,000 W (published figures differ between sources — confirm on the label)

DopingIron-doped (Fe)

Overall length (mm)240 (US distributor catalogue); 240mm MOL (Ushio); 252mm (Alpha-Cure Theimer TH5327)

Arc / lighted length (mm)127mm lighted length (Ushio); 120mm (Alpha-Cure Theimer TH5327)

Tube diameter (mm)24.4mm (Ushio); 24.5mm (Alpha-Cure Theimer TH5327)

Base / connectionCeramic base, AMP Connector contact (Ushio); Pinch seal (Alpha-Cure Theimer TH5327)

Doping / spectrumFe (iron-doped); Ushio: 300-450nm Multi-Spectrum

Rated life (h)600 (US distributor catalogue typical/warranty); 500 average (Ushio)

Need a replacement for the Ushio MHL-33LY?

Send the part number, a photo of the old lamp and your exposure unit model. We check length, base, doping and power and quote within 24 hours.

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Part numbers listed for this lamp

The same lamp — same overall length and spectrum — appears under all of these numbers in published replacement-lamp catalogues. Brand names identify the original part only.

Brand	Part number(s)
Ushio	MHL-33LY · 5000106
BLV	25440741 · MHL 33 LY
Theimer	TR 5327 · TH 5327
M&R	LY33
NuArc	FP 40 · NL 43 · LY 33
Amba	A 772408 · AM 625 X

Equipment this lamp is listed for

Lamp has Ignition Wire Exposure Unit, Flip Top Platemaker, Lithographic Exposure System Used in 40-631 • 40-PK1 • 40-PK2 • 40-PK3 • 52-631 • 52-PK4 • 52-PK5 • 52-PK6 • 66-631 • FT40AP • FT40APMA • FT40APNS • FT40APR • FT40APRNS • FT40APRNSVE • FT40APRVE • FT46AP • FT46APMA • FT46APNS • FT46APR • FT46APRNS • FT46APRNSVE • FT46APRVE • FT52APR • FT52APRNS • FT52APRNSVE • FT52APRVE • NL43 • NL52 • OH6

Other exposure lamps with the same doping and similar length

Shown for navigation only — a lamp only fits if length, base and doping all match your unit.

Amergraph 10265 · 240 mm Ushio MHL-153LY · 240 mm Theimer TH 5717 H · 245 mm Theimer TR 4100 O · 246 mm Ushio MHL 5027 · 247 mm Theimer TRS 5027 · 247 mm Theimer TR 5067 · 247 mm Theimer TR 8217 · 248 mm

Frequently asked

Which part numbers are listed for the same lamp as the Ushio MHL-33LY?

In published replacement-lamp catalogues the same lamp (same overall length and spectrum) is listed under 12 part numbers: Ushio MHL-33LY, Ushio 5000106, BLV 25440741, Theimer TR 5327, M&R LY33, BLV MHL 33 LY, NuArc FP 40, Amba A 772408, Theimer TH 5327, Amba AM 625 X, NuArc NL 43, NuArc LY 33. Confirm the length, base and doping of the lamp in your unit before ordering.

Can you supply a replacement for the Ushio MHL-33LY?

Yes — send the part number on your old lamp, a photo of its label and ends, and your exposure unit model. We check overall length, base, doping and power against the original before we quote, and quote within 24 hours.

Why does the doping matter?

The metal added to the mercury fill (iron, gallium or none) sets which UV and violet wavelengths the lamp emits. Your dry film, solder mask, screen emulsion or printing plate is sensitised to particular wavelengths, so the replacement should carry the same doping as the original.

Safety: metal-halide exposure lamps contain mercury and emit strong UV. Never run one outside its housing, wear UV-blocking eye protection when servicing, handle with gloves, and return used lamps for mercury recycling.

Specifications and cross-references compiled from published lamp-maker data (Ushio, Alpha-Cure) and a US replacement-lamp distributor's catalogue. Where sources differ the values are shown side by side. Data is given for identification only — verify against your unit's manual. Lamps supplied by Kilowatt Lamps are compatible replacements and are not made by or affiliated with the brands named.