Rotary Switches
81 www.elma.com
24 positions high grade switch
Up to 12 channels
Smooth and low noise transition
Gold plated contacts: 3 micron
Low switching torque
Series attenuator
For THT resistors
Standard Product Variety
Number of channels (wafers)
IP60 or IP68
Configurable end stops
Shaft diameter; 6 mm or ¼"
Possible Customization
Shaft dimensions and shape
Bushing dimensions
Switching torque
Wafer spacer dimensions
Others
Audio Switch Series A
Resistors are not included
Preference Types Selection Chart1
Switching Mode
Resistor Value 1-Channel Version 2-Channel Version
Shorting Any 04A1A00 04A2A00
Typical Applications
High end volume control
2-Channel Version (2 Wafers)
Drawings
6
1
9,5
43
1, 6
17
20
25
ø6
26
BA
1C
ø40
ø1,6
M10 x 0,75
1, 5
2,5
7, 5
2,7
ø10,2
6
1
9,5
43
1, 6
17
20
25
ø6
26
BA
1C
ø40
ø1,6
M10 x 0,75
1, 5
2,5
7, 5
2,7
ø10,2
R1 R2 R24
AC
B
Circuit diagram
Front panel cut out Circuit diagram
1 For other types/options, see type key.
Rotary Switches
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R1 R2 R23
13
2
Circuit diagram
1
9,5
46
10
2,54 2,54
0,64
17,518,5
25
26
204
ø32
ø1,6
123
ø6
M10 x 0,75
1, 5
2,5
7, 5
2,7
ø10,2
Front panel cut out
24 positions high grade switch
Up to 12 channels
Smooth and low noise transition
Gold plated contacts: 3 micron
Low switching torque
Series attenuator
SMT resistors (mounted)
Standard Product Variety
Number of channels (wafers)
Resistor value: 10k, 50k, 100k
IP60 or IP68
Configurable end stops
Shaft diameter; 6 mm or ¼"
Possible Customization
Shaft dimensions and shape
Bushing dimensions
Switching torque
Wafer spacer dimensions
Others
Audio Switch Series N
Preference Types Selection Chart1
Switching Mode
Resistor Value 1-Channel Version 2-Channel Version
Shorting
10 kOhms 04A1N01 04A2N01
50 kOhms 04A1N05 04A2N05
100 kOhms 04A1N10 04A2N10
Typical Applications
High end volume control
2-Channel Version (2 Wafers)
Drawings
Front panel cut out Circuit diagram
1 For other types/options, see type key.
1
9,5
46
10
2,54 2,54
0,64
17,518,5
25
26
204
ø32
ø1,6
123
ø6
M10 x 0,75
1, 5
2,5
7, 5
2,7
ø10,2
Front panel cut out
Rotary Switches
83 www.elma.com
6
1
9,5
78
2
17, 317 ,3 17,320
25
26
IN/OUT
1G
ø1,6
ø6
M10 x 0,75
ø43
7, 5
2,7
ø10 ,2
1, 5
2,5
Front panel cut out
IN
G
OUT
R1a
R2a
R24a
R1b
R2b
R24b
Circuit diagram
24 positions high grade switch
Up to 6 channels
Smooth and low noise transition
Gold plated contacts: 3 micron
Low switching torque
Ladder attenuator
For THT resistors
Standard Product Variety
Number of channels (wafers)
IP60 or IP68
Configurable end stops
Shaft diameter; 6 mm or ¼"
Possible Customization
Shaft dimensions and shape
Bushing dimensions
Switching torque
Wafer spacer dimensions
Others
Audio Switch Series R
Resistors are not included
Preference Types Selection Chart1
Switching Mode
Resistor Value 1-Channel Version 2-Channel Version
Shorting Any 04A1R00 04A2R00
Typical Applications
High end volume control
2-Channel Version (4 Wafers)
Drawings
Front panel cut out Circuit diagram
1 For other types/options, see type key.
Rotary Switches
84
www.elma.com
Audio Switches General
Specifications
Mechanical Data
Resolution: ........................................................................24 positions max. (15° indexing)
Switching torque (new condition):........................................Series A: 4.0 Ncm, series N: 1.5 Ncm, series R: 8.0 Ncm (+/- 25%)
Rotational life: ...................................................................25,000 switching cycles min.
Fastening torque of nut: .....................................................300 Ncm max.
Electrical Data
Function: ...........................................................................1 x 24 poles/positions per wafer
(max. 12 wafers; series A/N: 12 channels, series R: 6 channels)
Switching mode: ................................................................Shorting
Load current: .....................................................................2 A max. (resistive load)
Switching voltage: ..............................................................42 VDC max.
Contact resistance (new condition): .....................................100 mOhms max.
Insulation resistance: ..........................................................1012 Ohms min. (contact to contact/housing)
Switching capacitance: .......................................................1 pF max. (contact to contact)
Dielectric withstanding voltage: ...........................................500 VDC during 60 seconds
Material Data
Shaft: ................................................................................Stainless steel
Bushing/housing: ...............................................................Zinc diecast, zinc plated and passivated
Nut: ..................................................................................Brass, zinc plated and passivated
Contact plating: .................................................................AuCo (hard gold); 3 µm
Insulation material: ............................................................PCB: FR4 (glass fiber epoxy), rotor: Polybutylene (PBTB)
Soldering leads: .................................................................Alloy copper, AuCo plated (hard gold)
Environmental Data
Operating temperature range:............................................-40 to +85°C
IP sealing: .........................................................................IP60, optional IP68 (2 bar, 1 hour) shaft/front panel sealing
Vibration: ..........................................................................10 Grms max. @ 10 to 2000 Hz
Flammability:.....................................................................UL94-HB
Packaging Sizes
Tray: .................................................................................10 pcs.
Soldering Conditions
Hand soldering: .................................................................300°C max. during 3 s max.
Wave soldering: .................................................................280°C max. peak temperature during 5 s max.
Can be used in many cases in place of shortened bushes; made of glass-fibre
reinforced plastic to compensate the front panel thickness; available in two
standard lengths.
Length L Packaging Unit Order Number
3.5 mm 10 pcs. 4124-31
3.5 mm 100 pcs. 4124-30
5.5 mm 10 pcs. 4124-36
5.5 mm 100 pcs. 4124-35
Special Wafer Spacing
Our spacers allow the following wafer spacing:
L = 21.3 mm or 25.5 mm
Spacers
Rotary Switches
85 www.elma.com
Audio Switches General
Type Key
0 4 A X X X X - X X X X X X X X
Number of Channels
Series
A - Series A
N - Series N
R - Series R
Resistor Value (N Series Only)
00 - Without resistors
01 - 10 kOhms
05 - 50 kOhms
10 - 100 kOhms
IP Sealing
00 - IP60
30 - IP68
Shaft Diameter
0 - 6 mm
Z - ¼"
Shaft Length (AL)
000 - 25 mm
xxx - Custom1
(e.g. 18.5mm = 185)
1 Customized Shaft Length
Please state shaft length (AL) measured from mounting face
(max. AL = 50 mm).
Factory Set End Stop
00 - 24 pos.
23 - 23 pos.
22 - 22 pos.
21 - 21 pos.
20 - 20 pos.
19 - 19 pos.
18 - 18 pos.
17 - 17 pos.
16 - 16 pos.
15 - 15 pos.
14 - 14 pos.
13 - 13 pos.
12 - 12 pos.
11 - 11 pos.
10 - 10 pos.
09 - 9 pos.
08 - 8 pos.
07 - 7 pos.
06 - 6 pos.
05 - 5 pos.
04 - 4 pos.
03 - 3 pos.
02 - 2 pos.