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Ushio MHL 4000/U2 — UV exposure lamp replacement

Metal-halide (long-arc) lamp for PCB, screen-printing and plate exposure units, 241 mm, gallium-doped (Ga). Also listed as NuArc HQ 89, NuArc VE 553 and 9 more part numbers.

PowerNot published — read it from the lamp label

DopingGallium-doped (Ga)

Overall length (mm)241 (US distributor catalogue)

Doping / spectrumGa (gallium-doped)

Rated life (h)600 (US distributor catalogue typical/warranty)

Need a replacement for the Ushio MHL 4000/U2?

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 4000/U2
NuArc	HQ 89 · VE 553 · JQ 30 · FS 90
Hanovia	5339A400 · 6413A100
Theimer	TR 9800 · TH 9800
Caprock	CD/JQ-30
Bluetec	GMP 4002 · 225825

Equipment this lamp is listed for

NuArc U-Shaped lamp used in NuArc equipment: 4000UP, 4000-UP, FT32UP, FT32-UP, FT32UPNS, FT32-UPNS, FT40UP, FT4-0UP, FT40-3UP, FT40-3UPNS, FT40UPNS, FT40-UPNS, FT40UPNSLSP, FT40-UPNSLSP, FT40UPNSSP, FT40-UPNSSP, FT40UPSP, FT40-UPSP, FT46-UP, FT46UPNS, FT46-UPNS, FT52UP, FT52-UP, FT52UPNS, FT52-UPNS, FT52UPNSLSP, FT52-UPNSLSP, FT52UPNSSP, FT52-UPNSSP, FT52UPSP, FT52-UPSP, FT66UPNS, FT66-UPNS GMP 4002 Exp

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.

Theimer TR 4120 · 240 mm Amergraph MP3000T8/6J · 240 mm Theimer TR 3500 A · 245 mm Theimer TR 2060 · 245 mm Ushio MHL-5020 · 247 mm Ushio MHL-5020S · 247 mm Theimer TH 5020 · 249 mm Ushio MHL 4001 · 230 mm

Frequently asked

Which part numbers are listed for the same lamp as the Ushio MHL 4000/U2?

In published replacement-lamp catalogues the same lamp (same overall length and spectrum) is listed under 12 part numbers: Ushio MHL 4000/U2, NuArc HQ 89, NuArc VE 553, Hanovia 5339A400, Theimer TR 9800, Caprock CD/JQ-30, NuArc JQ 30, NuArc FS 90, Hanovia 6413A100, Bluetec GMP 4002, Bluetec 225825, Theimer TH 9800. Confirm the length, base and doping of the lamp in your unit before ordering.

Can you supply a replacement for the Ushio MHL 4000/U2?

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.