Circuit Breaker Accessories – Mouser United Kingdom

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Busbar Systems

Altech Busbar Systems are an innovative way to jumper up to 57 poles of miniature circuit breakers (MCB), manual motor controllers (MMC), and supplementary protectors (SP). Altech Busbars provide a 30% reduction in installation time, reduced maintenance, high electrical ratings, and save panel space. The Altech Universal UL489 Busbar fits most UL489 miniature circuit breakers on the market. The Altech Universal UL1077/508 Busbar fits most supplementary protectors and manual motor controllers in the market.

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Part #

Circuit Breaker Accessories Busbar,2Phase+1/2pole,18Sqmm,

2P18U3H/14
Altech
1: £38.26
1In Stock

Mfr. Part No.
2P18U3H/14

Mouser Part No
845-2P18U3H14

Altech

Circuit Breaker Accessories Busbar,2Phase+1/2pole,18Sqmm,

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Datasheet

1In Stock

£38.26

£27.23

£27.21

£25.22

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Min.: 1
Mult.: 1

Busbar

Circuit Breaker Accessories Busbar,3 Phase+1/2pole,25sqmm,

3P25U3H/12
Altech
1: £47.00
1In Stock

Mfr. Part No.
3P25U3H/12

Mouser Part No
845-3P25U3H12

Altech

Circuit Breaker Accessories Busbar,3 Phase+1/2pole,25sqmm,

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Datasheet

1In Stock

£47.00

£32.92

£31.12

£28.93

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Min.: 1
Mult.: 1

3 Phase Busbar

Busbar

3 Phase Busbar

Circuit Breaker Accessories Busbar,3 Ph, 57 PINS 19X3 POLE

3P25U3/57
Altech
1: £89.49
15In Stock

Mfr. Part No.
3P25U3/57

Mouser Part No
845-3P25U3/57

Altech

Circuit Breaker Accessories Busbar,3 Ph, 57 PINS 19X3 POLE

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Datasheet

15In Stock

£89.49

£72.38

Min.: 1
Mult.: 1

508

Busbar

3 Phase Busbar

Circuit Breaker Accessories Power Feed Lug for 1P/2P/3PUL

P35ULT
Altech
1: £10.25
295In Stock Restricted Availability

Mfr. Part No.
P35ULT

Mouser Part No
845-P35ULT

Altech

Circuit Breaker Accessories Power Feed Lug for 1P/2P/3PUL

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Datasheet

295In Stock

£10.25

£9.70

£9.69

Min.: 1
Mult.: 1

Restricted Availability

489

End Feed Device

Circuit Breaker Accessories Power Feed Lug for 1P/2P/3PU series

P50UT
Altech
1: £5.77
353In Stock Restricted Availability

Mfr. Part No.
P50UT

Mouser Part No
845-P50UT

Altech

Circuit Breaker Accessories Power Feed Lug for 1P/2P/3PU series

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Datasheet

353In Stock

£5.77

£5.76

£5.52

Quote

Min.: 1
Mult.: 1

Restricted Availability

508

Start/End Feed Device

Circuit Breaker Accessories 3 Ph Busbar 204.6mm 12Pin, 115A

3P16UL3/12
Altech
1: £31.78
108In Stock Restricted Availability

Mfr. Part No.
3P16UL3/12

Mouser Part No
845-3P16UL3/12

Altech

Circuit Breaker Accessories 3 Ph Busbar 204.6mm 12Pin, 115A

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Datasheet

108In Stock

£31.78

£27.05

£26.63

£23.65

View

Min.: 1
Mult.: 1

Restricted Availability

489

Busbar

3 Phase Busbar

Circuit Breaker Accessories 3 Ph Busbar 310.2mm 18Pin, 115A

3P16UL3/18
Altech
1: £37.98
184In Stock Restricted Availability

Mfr. Part No.
3P16UL3/18

Mouser Part No
845-3P16UL3/18

Altech

Circuit Breaker Accessories 3 Ph Busbar 310.2mm 18Pin, 115A

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Datasheet

184In Stock

£37.98

£37.52

£34.54

£33.95

Min.: 1
Mult.: 1

Restricted Availability

489

Busbar

3 Phase Busbar

Circuit Breaker Accessories End Cap for 1P/2P/3PU series

18/25CAP3P
Altech
1: £0.39
193In Stock

Mfr. Part No.
18/25CAP3P

Mouser Part No
845-18/25CAP3P

Altech

Circuit Breaker Accessories End Cap for 1P/2P/3PU series

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Datasheet

193In Stock

£0.39

Min.: 1
Mult.: 1

508

End Cap

3 Phase Busbar

Circuit Breaker Accessories 1 Ph Busbar 204.6mm 12Pin, 115A

1P16UL3/12
Altech
1: £20.52
26In Stock Restricted Availability

Mfr. Part No.
1P16UL3/12

Mouser Part No
845-1P16UL3/12

Altech

Circuit Breaker Accessories 1 Ph Busbar 204.6mm 12Pin, 115A

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Datasheet

26In Stock

£20.52

£18.59

£18.57

£14.61

View

Min.: 1
Mult.: 1

Restricted Availability

489

Busbar

1 Phase Busbar

Circuit Breaker Accessories 1 Ph Busbar 99mm 6Pin, 115A

1P16UL3/6
Altech
1: £11.41
3In Stock Restricted Availability
30Expected 05/03/2026

Mfr. Part No.
1P16UL3/6

Mouser Part No
845-1P16UL3/6

Altech

Circuit Breaker Accessories 1 Ph Busbar 99mm 6Pin, 115A

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Datasheet

3In Stock

30Expected 05/03/2026

£11.41

£11.34

£9.45

£9.26

View

Min.: 1
Mult.: 1

Restricted Availability

489

Busbar

1 Phase Busbar

Circuit Breaker Accessories 1 Ph Busbar 210.0mm 12Pin 12x1 pole, 80A

1P18U1/12
Altech
1: £13.80
5In Stock

Mfr. Part No.
1P18U1/12

Mouser Part No
845-1P18U1/12

Altech

Circuit Breaker Accessories 1 Ph Busbar 210.0mm 12Pin 12x1 pole, 80A

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Datasheet

5In Stock

£13.80

£12.35

£10.09

£9.50

View

Min.: 1
Mult.: 1

508

Busbar

1 Phase Busbar

Circuit Breaker Accessories 3Pin3x1Pole50.3mm 1 PhaseBusbar

1P18U1/3
Altech
1: £5.65
14In Stock

Mfr. Part No.
1P18U1/3

Mouser Part No
845-1P18U1/3

Altech

Circuit Breaker Accessories 3Pin3x1Pole50.3mm 1 PhaseBusbar

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Datasheet

14In Stock

£5.65

£5.53

£5.27

£4.98

View

Min.: 1
Mult.: 1

Busbar

1 Phase Busbar

Circuit Breaker Accessories 1 PH BUSBAR 18sqmm 57 LUGS

1P18U1/57
Altech
1: £41.81
3In Stock

Mfr. Part No.
1P18U1/57

Mouser Part No
845-1P18U1/57

Altech

Circuit Breaker Accessories 1 PH BUSBAR 18sqmm 57 LUGS

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Datasheet

3In Stock

£41.81

£32.26

£28.00

£27.07

View

Min.: 1
Mult.: 1

508

Busbar

1 Phase Busbar

Circuit Breaker Accessories 2 Ph Busbar 204.6mm 12Pin, 115A

2P16UL3/12
Altech
1: £26.64
11In Stock Restricted Availability

Mfr. Part No.
2P16UL3/12

Mouser Part No
845-2P16UL3/12

Altech

Circuit Breaker Accessories 2 Ph Busbar 204.6mm 12Pin, 115A

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Datasheet

11In Stock

£26.64

£24.49

£23.61

£20.41

View

Min.: 1
Mult.: 1

Restricted Availability

489

Busbar

2 Phase Busbar

Circuit Breaker Accessories 2 Ph Busbar 99mm 6Pin, 115A

2P16UL3/6
Altech
1: £12.06
41In Stock Restricted Availability

Mfr. Part No.
2P16UL3/6

Mouser Part No
845-2P16UL3/6

Altech

Circuit Breaker Accessories 2 Ph Busbar 99mm 6Pin, 115A

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Datasheet

41In Stock

£12.06

£11.24

£10.70

View

Min.: 1
Mult.: 1

Restricted Availability

489

Busbar

2 Phase Busbar

Circuit Breaker Accessories 2 Ph Busbar 66.3mm 4P 2x2 pole, 80A

2P18U3/4
Altech
1: £15.67
6In Stock

Mfr. Part No.
2P18U3/4

Mouser Part No
845-2P18U3/4

Altech

Circuit Breaker Accessories 2 Ph Busbar 66.3mm 4P 2x2 pole, 80A

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Datasheet

6In Stock

£15.67

£14.77

£14.16

£13.71

View

Min.: 1
Mult.: 1

508

Busbar

2 Phase Busbar

Circuit Breaker Accessories 2 Ph Busbar 137.3mm 8Pin, 4x2 pole, 80A

2P18U3/8
Altech
1: £23.53
39In Stock

Mfr. Part No.
2P18U3/8

Mouser Part No
845-2P18U3/8

Altech

Circuit Breaker Accessories 2 Ph Busbar 137.3mm 8Pin, 4x2 pole, 80A

Learn More

Datasheet

39In Stock

£23.53

£22.64

£20.66

£18.81

View

Min.: 1
Mult.: 1

508

Busbar

2 Phase Busbar

Circuit Breaker Accessories Busbar,2 Phase,18sqmm,PIN Type

2P18U3/10
Altech
1: £29.47
23In Stock

Mfr. Part No.
2P18U3/10

Mouser Part No
845-2P18U310

Altech

Circuit Breaker Accessories Busbar,2 Phase,18sqmm,PIN Type

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Datasheet

23In Stock

£29.47

£24.85

£23.99

£20.14

View

Min.: 1
Mult.: 1

Busbar

2 Phase Busbar

Circuit Breaker Accessories Busbar,2 Phase,18sqmm,PIN Type

2P18U3/16
Altech
1: £25.71
2In Stock

Mfr. Part No.
2P18U3/16

Mouser Part No
845-2P18U316

Altech

Circuit Breaker Accessories Busbar,2 Phase,18sqmm,PIN Type

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Datasheet

2In Stock

£25.71

£24.97

£24.44

£23.41

View

Min.: 1
Mult.: 1

Busbar

2 Phase Busbar

Circuit Breaker Accessories 3 Ph Busbar 99mm 6Pin, 115A

3P16UL3/6
Altech
1: £18.39
40In Stock Restricted Availability
34Expected 24/02/2026

Mfr. Part No.
3P16UL3/6

Mouser Part No
845-3P16UL3/6

Altech

Circuit Breaker Accessories 3 Ph Busbar 99mm 6Pin, 115A

Learn More

Datasheet

40In Stock

34Expected 24/02/2026

£18.39

£17.93

£15.29

£14.39

View

Min.: 1
Mult.: 1

Restricted Availability

489

Busbar

3 Phase Busbar

Circuit Breaker Accessories Busbar,3 Phase,25sqmm,PIN Type

3P25U3/12
Altech
1: £34.46
6In Stock

Mfr. Part No.
3P25U3/12

Mouser Part No
845-3P25U312

Altech

Circuit Breaker Accessories Busbar,3 Phase,25sqmm,PIN Type

Learn More

Datasheet

6In Stock

£34.46

£33.32

£32.58

£31.87

Quote

Min.: 1
Mult.: 1

Busbar

Circuit Breaker Accessories Busbar,3 Phase,25sqmm,PIN Type

3P25U3/9
Altech
1: £43.37
4In Stock

Mfr. Part No.
3P25U3/9

Mouser Part No
845-3P25U39

Altech

Circuit Breaker Accessories Busbar,3 Phase,25sqmm,PIN Type

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4In Stock

£43.37

£37.93

£29.38

£27.39

View

Min.: 1
Mult.: 1

Busbar

3 Phase Busbar

Circuit Breaker Accessories Insul Cap 3 pr strip for 1P/2P/3PUL

BRUL
Altech
1: £1.48
144In Stock

Mfr. Part No.
BRUL

Mouser Part No
845-BRUL

Altech

Circuit Breaker Accessories Insul Cap 3 pr strip for 1P/2P/3PUL

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Datasheet

144In Stock

£1.48

£1.40

£1.35

£1.32

£1.29

Min.: 1
Mult.: 1

489

Cap

Insulation Cap

Circuit Breaker Accessories BUS BAR SUPPT W/SCRW

NES
Altech
1: £1.46
44In Stock

Mfr. Part No.
NES

Mouser Part No
845-NES

Altech

Circuit Breaker Accessories BUS BAR SUPPT W/SCRW

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Datasheet

44In Stock

£1.46

£1.42

£1.37

£0.526

View

Min.: 1
Mult.: 1

Busbar

Plastic Support with Fixing Screw

Circuit Breaker Accessories MODULAR DIR PWR FEED FOR 1-3 PH BUSBAR

P50UB
Altech
1: £6.44
92In Stock Restricted Availability

Mfr. Part No.
P50UB

Mouser Part No
845-P50UB

Altech

Circuit Breaker Accessories MODULAR DIR PWR FEED FOR 1-3 PH BUSBAR

Learn More

Datasheet

92In Stock

£6.44

£6.36

£6.05

Min.: 1
Mult.: 1

Restricted Availability

508

Start/End Feed Device

Busbar Systems

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