LH3-UC25XL
Flameproof horn loudspeaker, long flare, 25W
25 / 15 / 6.5 / 5 / 2.5 / 1.5 W | Anti-static polyamide | 109 dB SPL (1W, 1m) | 380 Hz to 7 kHz | IECEx / ATEX
LH3-UC25XL
Flameproof horn loudspeaker, long flare, 25W
25 / 15 / 6.5 / 5 / 2.5 / 1.5 W | Anti-static polyamide | 109 dB SPL (1W, 1m) | 380 Hz to 7 kHz | IECEx / ATEX
Bosch LH3-UC25XL Product Highlights
Explore the key capabilities of the Bosch LH3-UC25XL horn loudspeaker.
Hazardous Areas
Certified for gas Zone 1 and dust Zone 21: IECEx, ATEX, US, CSA, CCC.
Anti-Static Polyamide
A sturdy, lightweight anti-static horn, IP66/67.
Long Flare
109 dB at 1 W, up to 122 dB, opening angle 100° / 30°.
Stainless Bracket
316 stainless steel bracket with a ratchet that holds the aim.
Supervision Ready
A wire loop for an optional supervision board; loop-through entry.
-50 °C to +60 °C
Works from -50 °C to +60 °C; six power taps on 100 V.
Key specs
- Taps 25 / 15 / 6.5 / 5 / 2.5 / 1.5 W (100 V)
- 122 / 109 dB SPL at 25 W / 1 W (1 kHz, 1 m)
- 380 Hz to 7 kHz
- Opening angle 100° / 30° (1 / 4 kHz)
- 200 x 270 x 348 mm, 2.72 kg
- Anti-static polyamide horn
- 316 stainless steel bracket, ratchet
- M20 Ex cable gland, loop-through hole
- IP66/67, -50 °C to +60 °C
- Black RAL 9005
- IECEx / ATEX II 2G Ex db eb mb IIB+H2 T4 Gb, II 2D Ex tb IIIC T105 °C Db
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Technical specifications |
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Electrical |
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Rated power (PHC) |
25 W |
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Rated power |
25 / 15 / 6.5 / 5 / 2.5 / 1.5 W |
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Sound pressure level at rated power / 1 W (1 kHz, 1 m) |
122 dB / 109 dB |
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Opening angle at 1 kHz/ 4 kHz (- 6 dB) |
100 / 30 degrees |
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Effective frequency range (-10 dB) |
380 Hz to 7000 Hz |
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Rated voltage |
100 V |
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Rated impedance |
400 ohm |
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Electrical connection |
2 x 6 pole push terminal |
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Acceptable wire gauge |
0.5 mm - 2.5 mm2 (AWG 20-12) |
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Mechanical |
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Material horn |
Polyamide (PA) |
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Material bracket |
Stainless Steel (Grade 316) |
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Dimensions (H x W x D) |
200 x 270 x 348 mm (7.87 x 10.62 x 13.70 in) |
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Weight |
2.72 kg (5.99 lb) |
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Color |
Black (RAL 9005) |
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Cable gland (standard supplied) |
M20 Polyamide (PA) |
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Cable diameter |
11 mm to 14 mm (0.43 in to 0.55 in) |
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Environmental |
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Operating temperature |
-50 ºC to +60 ºC (-58 ºF to +140 ºF) |
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Storage temperature |
-40 ºC to +70 ºC (-40 ºF to +158 ºF) |
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Relative humidity |
<95% |
Know before you buy
Quick answers about the LH3-UC25XL, and how it compares.
Where can the LH3 horn be used?
In areas where explosive gas-air mixtures or combustible dust are likely, such as refineries, plants and tank farms. Certified IECEx and ATEX: II 2G Ex db eb mb IIB+H2 T4 Gb (gas, Zone 1) and II 2D Ex tb IIIC T105 °C Db (dust, Zone 21), plus US Class 1 Zone 1, CSA and CCC. Housing IP66/67, from -50 °C to +60 °C.
LH3-UC25XS or LH3-UC25XL?
Same flameproof 25 W horn. The LH3-UC25XS short flare is compact (2.37 kg) with a wider 120° beam and 118 dB max; the LH3-UC25XL long flare gives 122 dB and a narrower 100° beam for longer distances.
Which horn loudspeaker do I need?
| Model | Build | Power taps | SPL 1 W / max (1 kHz) | Frequency range | Range |
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| LHE-10CGE | Fibre-reinforced ABS, IP66 | 10 / 5 W | 105 / 114 dB | 410 Hz to 9.7 kHz | Entry |
| LHE-30CGE | Fibre-reinforced ABS, IP66 | 30 / 15 W | 108 / 122 dB | 400 Hz to 11.3 kHz | Entry |
| LBC3481/12 | ABS, IP65 | 10 / 5 / 2.5 W | 103 / 113 dB | 500 Hz to 7 kHz | Entry |
| LHM-10MGE | Aluminium, IP66 | 10 / 5 W | 105 / 114 dB | 400 Hz to 9.7 kHz | Mid |
| LHM-30MGE | Aluminium, IP66 | 30 / 15 W | 109 / 123 dB | 315 Hz to 7.1 kHz | Mid |
| LHM-50MGE | Aluminium, IP66 | 50 / 25 W | 111 / 127 dB | 310 Hz to 6.6 kHz | Mid |
| LBC3492/12 | Aluminium and ABS, IP65 | 20 / 10 / 5 W | 110 / 123 dB | 380 Hz to 5.5 kHz | Mid |
| LBC3493/12 | Aluminium and ABS, IP65 | 30 / 15 / 7.5 W | 111 / 126 dB | 380 Hz to 5 kHz | Mid |
| LBC3484/00 | Aluminium, IP65 | 50 / 25 / 12.5 W | 110 / 127 dB | 350 Hz to 4 kHz | Mid |
| LH1-UC30E | ABS, two-way music horn | 30 / 15 / 7.5 / 3.75 W | 100 dB at 1 W | 210 Hz to 20 kHz | Performance |
| LH3-UC25XS | Polyamide, ex-proof | 25 W to 1.5 W | 106 / 118 dB | 380 Hz to 8 kHz | Hazardous areas |
| LH3-UC25XL | Polyamide, ex-proof | 25 W to 1.5 W | 109 / 122 dB | 380 Hz to 7 kHz | Hazardous areas |
The new LHE and LHM horns are EN54-24 with a smart bracket; so is the LH1-UC30E. Ranges: Entry, Mid, Performance.
What do the power taps mean?
Each loudspeaker can be set to one of its power taps, for example 6 / 3 W. Choose a lower tap for small or quiet areas and a higher tap for large or noisy ones. Add up the taps of every loudspeaker on a line: the amplifier must deliver at least that total.
Many 6 W ceiling loudspeakers are tapped down to 3 W, 1.5 W or 0.75 W in the field; in smaller or low-noise areas 3 W is more than enough.
Who supplies Bosch loudspeakers in the UAE, and what warranty do I get?
Protechtors General Trading LLC (hik.ae) is an authorized partner of Bosch, Dynacord and Electro-Voice in the UAE, so everything we supply is genuine and comes with a 3-year warranty. Warranty is carry-in: bring the unit to our office in Dubai and after inspection it is repaired or replaced as needed.
We supply Bosch loudspeakers across the UAE and support you after the sale. Prices are quoted per project: tell us what you need and we will send a quote.