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Home › UV exposure lamps › Ushio MHL-38KT

Ushio MHL-38KT — UV exposure lamp replacement

Metal-halide (long-arc) lamp for PCB, screen-printing and plate exposure units, 215 mm, gallium-doped (Ga). Also listed as Ushio 25451641, Ushio 5000107 and 19 more part numbers.

Power6,000 W (published figures differ between sources — confirm on the label)
DopingGallium-doped (Ga)
Overall length (mm)215 (US distributor catalogue); 222mm MOL (Ushio); 224mm (Alpha-Cure Amba AM5510X); 218mm (Alpha-Cure BLV KT38)
Arc / lighted length (mm)120mm lighted length (Ushio); 120mm (Alpha-Cure Amba AM5510X); 114mm (Alpha-Cure BLV KT38)
Tube diameter (mm)28mm (Ushio); 26mm (Alpha-Cure Amba AM5510X); 26mm (Alpha-Cure BLV KT38)
Base / connectionMetal 12.7mm base, Metal contact (Ushio); Pinch seal (Alpha-Cure Amba AM5510X); Pinch seal (Alpha-Cure BLV KT38)
Doping / spectrumGa (gallium-doped); Ushio: 400-450nm Diazo
Rated life (h)600 (US distributor catalogue typical/warranty); 500 average (Ushio)

Need a replacement for the Ushio MHL-38KT?

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.

BrandPart number(s)
UshioMHL-38KT · 25451641 · 5000107
TheimerTHO 6420 · TRO 2230 · THO 2230
RST048777267790
HeraeusQ 2842 Z4
BLV25351141 · MHL-38KT
Worldwide005.0020
Light TechLET38KT
Ark LiteLET 78PM
AmbaAM 5510 X
M&RKT38
Cure UV191153
NuArcPM 78 · KT 98 · KT 38
HanoviaHF502B71 · HFS502B71
Alpha CureACP-6583

Equipment this lamp is listed for

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 5100 · 215 mmUshio MHL 6020 S · 210 mmTheimer TR 5080 · 220 mmOlec L 1150 B · 210 mmTheimer TR 4080 A · 205 mmTechnigraf MA030 AC0195 · 225 mmTheimer TR 4220 · 227 mmTheimer TR 3950 A · 228 mm

Frequently asked

Which part numbers are listed for the same lamp as the Ushio MHL-38KT?

In published replacement-lamp catalogues the same lamp (same overall length and spectrum) is listed under 22 part numbers: Ushio MHL-38KT, Ushio 25451641, Ushio 5000107, Theimer THO 6420, RST 048777267790, Heraeus Q 2842 Z4, BLV 25351141, Worldwide 005.0020, Light Tech LET38KT, Theimer TRO 2230, Ark Lite LET 78PM, Amba AM 5510 X, M&R KT38, Cure UV 191153, Theimer THO 2230, BLV MHL-38KT, NuArc PM 78, Hanovia HF502B71, Hanovia HFS502B71, Alpha Cure ACP-6583, NuArc KT 98, NuArc KT 38. Confirm the length, base and doping of the lamp in your unit before ordering.

Can you supply a replacement for the Ushio MHL-38KT?

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.

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