Bosch LH3-UC25XS Specsheet

Communications Systems | LH3-UC25XS EX Flameproof Horn Loudspeaker Short Flare

LH3-UC25XS EX Flameproof Horn
Loudspeaker Short Flare

www.boschsecurity.com

u ATEX, IECEx, UL, CSA , and INMETRO certified

u Constructed from sturdy, lightweight, anti-static

Polyamid material

The LH3-UC25XS horn loudspeaker is specifically
designed and certified for installations where
explosive gas-air mixtures are likely to be present. The
horn is constructed from anti-static Polyamid material,
making the horn sturdy and light weighted.

Functions

The horn loudspeaker is standard supplied with a
sturdy stainless steel mounting bracket allowing the
sound beam to be accurately directed.
The mounting bracket has a ratchet facility to ensure it
stays correctly positioned.
The connection cable is fed out through an ABS EX
cable gland (M20) in the rear cover, which can be
removed for entering the inside connection terminal
block. For loop through connection, the rear cover is
fitted with a second hole (covered with a blanking plug
as standard supplied).
The horn loudspeaker includes a transformer for 100 V
input voltage, with taps on the primary winding for
different power settings.

u Water- and dust-protected to class IP67

u Provision for connection of the optional supervision

boards

The different power taps can easily be selected by
connecting to the appropriate terminal of the 6-way
terminal block.
For enabling loudspeaker supervision, a wire loop from
the secondary side of the horn loudspeaker is available
in the connection area. This wire loop is normally
closed, but if used with the supervision board, cut and
connected.

25 mm (0.98”)

144 mm (5.66”)

186 mm (7.32”)

7 mm (0.28”)

120 mm (4.72”)

156 mm (6.14”)

170 mm (6.69”)

180 mm (7.00”)

3 mm (0.12”)

60 mm (2.36”)

207 mm (8.14”)

8

21 25 W

15 W

32

6,5 W43

5 W31
2,5 W42
1,5 W41

2

1

2

3

4

5

6

2 | LH3-UC25XS EX Flameproof Horn Loudspeaker Short Flare

Dimensions in mm (inch)

Circuit diagram

Frequency response

3 | LH3-UC25XS EX Flameproof Horn Loudspeaker Short Flare

Horizontal polar diagram (low frequency part)

Horizontal polar diagram (high frequency part)

Vertical polar diagram (low frequency part)

Vertical polar diagram (high frequency part)

4 | LH3-UC25XS EX Flameproof Horn Loudspeaker Short Flare

Octave band sensitivity *

Octave SPL

1W/1m

125 Hz 57.9 - -

250 Hz 81.3 - -

500 Hz 97.6 - -

1000 Hz 103.8 - -

2000 Hz 105.7

4000 Hz 99.8 - -

8000 Hz 97.0 - -

A‑weighted - 99.7 111.7

Lin‑weighted - 99.1 111.3

Octave band opening angles

Horizontal Vertical

125 Hz 360 360

250 Hz 360 360

500 Hz 360 360

1000 Hz 155 188

2000 Hz 81 95

4000 Hz 47 50

8000 Hz 32 29

Total octave
SPL
1W/1m

Total octave
SPL
Pmax/1m

Acoustical performance specified per octave
* (all measurements are done with a pink noise signal;
the values are in dB SPL).

Certifications and approvals

Quality assurance

All Bosch loudspeakers are designed to withstand
operating at their rated power for 100 hours in
accordance with IEC 268-5 Power Handling Capacity
(PHC) standards. Bosch has also developed the
Simulated Acoustical Feedback Exposure (SAFE) test
to demonstrate that they can withstand two times
their rated power for short durations. This ensures
improved reliability under extreme conditions, leading
to higher customer satisfaction, longer operating life,
and lessons the chance of failure or performance
deterioration.

Safety According to EN 60065

Water and dust According to EN 60529, IP 67

CSA Ex d e m IIB + H2 T4 Gb (Canada)

UL Class 1 Zone 1 AEx d e mb IIB + H2 T4

Gb (US)

INMETRO Ex d e mb IIB + H2 T4 Gb

Parts included

Quantity Component

1 LH3‑UC25XS Horn Loudspeaker

1 Installation instruction

1 M20 Ex Cable gland PG13

Technical specifications

Electrical*

Maximum power 30 W

Rated power (PHC) 25 W

Rated power 25 / 15 / 6.5/ 5/ 2.5/ 1.5 W

Sound pressure level
at rated power / 1 W
(1 kHz, 1 m)

Opening angle
at 1 kHz/ 4 kHz (- 6 dB)

Effective frequency range
(-10 dB)

Rated voltage 100 V

Rated impedance 400 ohm

Electrical connection 2 x 6 pole push terminal

Acceptable wire gauge 0.5 – 2.5 mm2 (AWG 20-12)

118 dB / 104 dB

155 / 47 degrees

480 Hz to 7000 Hz

* Technical performance data acc. to IEC 60268‑5

Mechanical

Material horn Polyamide (PA)

Material bracket Stainless Steel (Grade 316)

Dimensions (H x W x D) 144 x 170 x 207 mm

(5.66 x 6.69 x 8.15 in)

Weight 2.37 kg (5.22 lb)

Color Black (RAL 9005)

Cable gland (standard
supplied)

Cable diameter 8 mm to 13 mm (0.31 in to 0.51 in)

M20 Polyamide (PA)

Nemko II 2D Ex tb IIIC T105 ºC

IECEx / ATEX II 2G Ex d e mb IIB + H2 T4 Gb

5 | LH3-UC25XS EX Flameproof Horn Loudspeaker Short Flare

Environmental

Operating temperature -50 ºC to +60 ºC (-58 ºF to +140 ºF)

Storage temperature -40 ºC to +70 ºC (-40 ºF to +158 ºF)

Relative humidity <95%

6 | LH3-UC25XS EX Flameproof Horn Loudspeaker Short Flare

Represented by:

Europe, Middle East, Africa: Germany: North America: Asia-Pacific:

Bosch Security Systems B.V.
P.O. Box 80002
5600 JB Eindhoven, The Netherlands
Phone: + 31 40 2577 284
[e-mail]
emea.boschsecurity.com

Bosch Sicherheitssysteme GmbH
Robert-Bosch-Ring 5
85630 Grasbrunn
Germany
www.boschsecurity.com

Bosch Security Systems, Inc.
130 Perinton Parkway
Fairport, New York, 14450, USA
Phone: [phone]
Fax: [phone]
[e-mail]
www.boschsecurity.us

Robert Bosch (SEA) Pte Ltd, Security Systems
11 Bishan Street 21
Singapore 573943
Phone: [phone]
Fax: [phone]
[e-mail]
www.boschsecurity.asia

© Bosch Security Systems 2016 | Data subject to change without notice
22498805131 | en, V4, 06. Dec 2016

Ordering information

LH3-UC25XS EX Flameproof Horn Loudspeaker Short
Flare

Flameproof horn loudspeaker with short flare.

Order number LH3-UC25XS