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Circuit Protection

Circuit Protection devices and components are available at Mouser from industry leading manufacturers. Mouser is an authorized distributor for many circuit protection manufacturers including Bourns, Eaton, TDK, Littelfuse, Semtech, Vishay, & more.
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Types of Circuit Protection

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (GBP) Filter the results in the table by unit price based on your quantity.	Qty.
NTC (Negative Temperature Coefficient) Thermistors NTC SMD 0603 100kO 2% B25/50 4250K BTN06G104G4EF1T0A Bourns 1: £0.12 8,000In Stock New Product	Mfr. Part No. BTN06G104G4EF1T0A Mouser Part No 652-BTN061044EF1T0A New Product	Bourns	NTC (Negative Temperature Coefficient) Thermistors NTC SMD 0603 100kO 2% B25/50 4250K Learn More about Bourns btn06g ntc thermistors	Datasheet	8,000In Stock	Cut Tape £0.12 £0.106 £0.093 £0.074 Reel £0.057 View £0.065 £0.062 £0.054 £0.052 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
Varistors 20mm Radial Disc-Kinked Leads,Bulk MOV-20D152KKC Bourns 1: £2.56 175In Stock New Product	Mfr. Part No. MOV-20D152KKC Mouser Part No 652-MOV-20D152KKC New Product	Bourns	Varistors 20mm Radial Disc-Kinked Leads,Bulk Learn More about Bourns mov kc metal oxide varistors	Datasheet	175In Stock	£2.56 £1.62 £1.26 £1.17 View £1.03 £0.863 £0.841	Min.: 1 Mult.: 1
Connectorised Surge Protectors Type N F/F Coaxial RF Surge Protector, 800MHz - 2.5GHz, 300W, IP67, 6 V Max., 175uJ, 20kA, Hybrid, Bracket Down, Hole Mount DGXZ+06NFNF-A PolyPhaser 1: £162.25 33In Stock 20Expected 30/10/2026 New Product	Mfr. Part No. DGXZ+06NFNF-A Mouser Part No 44-DGXZ+06NFNF-A New Product	PolyPhaser	Connectorised Surge Protectors Type N F/F Coaxial RF Surge Protector, 800MHz - 2.5GHz, 300W, IP67, 6 V Max., 175uJ, 20kA, Hybrid, Bracket Down, Hole Mount Learn More about PolyPhaser gx surge protectors	Datasheet	33In Stock 20Expected 30/10/2026	£162.25 £155.39	Min.: 1 Mult.: 1
Connectorised Surge Protectors Type N F/F Coaxial RF Surge Protector, 800MHz - 2.5GHz, 300W, IP67, 15 V Max., 500uJ, 20kA, Hybrid, Bracket Down, Hole Mount DGXZ+15NFNF-A PolyPhaser 1: £140.92 362In Stock 153Expected 30/10/2026 New Product	Mfr. Part No. DGXZ+15NFNF-A Mouser Part No 44-DGXZ+15NFNF-A New Product	PolyPhaser	Connectorised Surge Protectors Type N F/F Coaxial RF Surge Protector, 800MHz - 2.5GHz, 300W, IP67, 15 V Max., 500uJ, 20kA, Hybrid, Bracket Down, Hole Mount Learn More about PolyPhaser gx surge protectors	Datasheet	362In Stock 153Expected 30/10/2026	£140.92 £134.96	Min.: 1 Mult.: 1
Circuit Breakers LG 3 POLE 150KA FRAME ONLY LGU3630NN Eaton Electrical 1: £11,238.57 1In Stock New Product	Mfr. Part No. LGU3630NN Mouser Part No 504-LGU3630NN New Product	Eaton Electrical	Circuit Breakers LG 3 POLE 150KA FRAME ONLY	Datasheet	1In Stock	£11,238.57	Min.: 1 Mult.: 1
Connectorised Surge Protectors Type N F/M Bulkhead Coaxial RF Surge Protector, 10MHz - 1GHz, DC Block, 1.5kW, 3.5mJ, 20kA, Blocking Cap, Hole Mount, Use IS-B50LN-C2-ME IS-B50LN-C0-ME PolyPhaser 1: £84.01 307In Stock New Product	Mfr. Part No. IS-B50LN-C0-ME Mouser Part No 44-IS-B50LN-C0-ME New Product	PolyPhaser	Connectorised Surge Protectors Type N F/M Bulkhead Coaxial RF Surge Protector, 10MHz - 1GHz, DC Block, 1.5kW, 3.5mJ, 20kA, Blocking Cap, Hole Mount, Use IS-B50LN-C2-ME Learn More about PolyPhaser is b50 surge protectors	Datasheet	307In Stock	£84.01 £79.68	Min.: 1 Mult.: 1
Connectorised Surge Protectors Type N F/F Bulkhead Coaxial RF Surge Protector, 10MHz - 1GHz, DC Block, 1.5kW, 120uJ, 20kA, Blocking Cap, Hole Mount IS-B50LN-C2 PolyPhaser 1: £82.72 480In Stock 58Expected 30/10/2026 New Product	Mfr. Part No. IS-B50LN-C2 Mouser Part No 44-IS-B50LN-C2 New Product	PolyPhaser	Connectorised Surge Protectors Type N F/F Bulkhead Coaxial RF Surge Protector, 10MHz - 1GHz, DC Block, 1.5kW, 120uJ, 20kA, Blocking Cap, Hole Mount Learn More about PolyPhaser is b50 surge protectors	Datasheet	480In Stock 58Expected 30/10/2026	£82.72 £78.45	Min.: 1 Mult.: 1
Connectorised Surge Protectors Type N F/F Coaxial RF Surge Protector, 100MHz - 512MHz, DC Block, 750W, IP67, .5uJ, 20kA, Filter, Bracket Down, Hole Mount VHF50HN PolyPhaser 1: £120.20 426In Stock New Product	Mfr. Part No. VHF50HN Mouser Part No 44-VHF50HN New Product	PolyPhaser	Connectorised Surge Protectors Type N F/F Coaxial RF Surge Protector, 100MHz - 512MHz, DC Block, 750W, IP67, .5uJ, 20kA, Filter, Bracket Down, Hole Mount Learn More about PolyPhaser 100mhz 512mhz surge protectors	Datasheet	426In Stock	£120.20 £114.01	Min.: 1 Mult.: 1
Connectorised Surge Protectors Type N F/F Bulkhead Coaxial RF Surge Protector, 698MHz - 2.7GHz, DC Block, 500W, IP67, .005uJ, 40kA, Filter TSX-NFF PolyPhaser 1: £127.96 175In Stock 30Expected 30/10/2026 New Product	Mfr. Part No. TSX-NFF Mouser Part No 44-TSX-NFF New Product	PolyPhaser	Connectorised Surge Protectors Type N F/F Bulkhead Coaxial RF Surge Protector, 698MHz - 2.7GHz, DC Block, 500W, IP67, .005uJ, 40kA, Filter Learn More about PolyPhaser tsx tusx rf surge protectors	Datasheet	175In Stock 30Expected 30/10/2026	£127.96 £121.36	Min.: 1 Mult.: 1
Connectorised Surge Protectors Citel P8AX09-N/FF/HE P8AX09-N/FF/HE Citel 1: £116.11 3In Stock New At Mouser	Mfr. Part No. P8AX09-N/FF/HE Mouser Part No 703-P8AX09-N/FF/HE New At Mouser	Citel	Connectorised Surge Protectors	Datasheet	3In Stock	£116.11 £96.27 £90.85 £69.47	Min.: 1 Mult.: 1
NTC (Negative Temperature Coefficient) Thermistors ESAPP-ESA PROBE-RTD PT1000, 2000mm 20016752-02 TE Connectivity 1: £1,084.75 14In Stock New Product	Mfr. Part No. 20016752-02 Mouser Part No 571-20016752-02 New Product	TE Connectivity	NTC (Negative Temperature Coefficient) Thermistors ESAPP-ESA PROBE-RTD PT1000, 2000mm Learn More about TE Connectivity te surface mount temperature sensors	Datasheet	14In Stock	£1,084.75 £991.70 £913.43 View Quote	Min.: 1 Mult.: 1
ESD Protection Diodes / TVS Diodes TVS SURF MT DO214AA - SMBJ33A 3K T&R Littelfuse SMBJ33A-E SMBJ33A-E Littelfuse 1: £0.421 2,076In Stock New Product	Mfr. Part No. SMBJ33A-E Mouser Part No 576-SMBJ33AE New Product	Littelfuse	ESD Protection Diodes / TVS Diodes TVS SURF MT DO214AA - SMBJ33A 3K T&R	Datasheet	2,076In Stock	Cut Tape £0.421 £0.266 £0.169 £0.126 Reel £0.088 View £0.102 £0.087 £0.074 £0.07	Min.: 1 Mult.: 1 : 3,000
Circuit Breaker Accessories NQB L103 Eaton Electrical 69D2660G11 69D2660G11 Eaton Electrical 1: £6,771.96 2In Stock New Product	Mfr. Part No. 69D2660G11 Mouser Part No 504-69D2660G11 New Product	Eaton Electrical	Circuit Breaker Accessories NQB L103		2In Stock	£6,771.96	Min.: 1 Mult.: 1
Connectorised Surge Protectors Type N F/F Bulkhead Coaxial RF Surge Protector, DC - 3.0GHz, DC Pass, 60V, 2000W, IP67, 20kA, Gas Tube, Bracket Included 103-0324A-A PolyPhaser 1: £82.72 83In Stock New Product	Mfr. Part No. 103-0324A-A Mouser Part No 44-103-0324A-A New Product	PolyPhaser	Connectorised Surge Protectors Type N F/F Bulkhead Coaxial RF Surge Protector, DC - 3.0GHz, DC Pass, 60V, 2000W, IP67, 20kA, Gas Tube, Bracket Included	Datasheet	83In Stock	£82.72 £78.45	Min.: 1 Mult.: 1
Connectorised Surge Protectors Type N F/F Bulkhead Coaxial RF Surge Protector, 2GHz - 6GHz, DC Block, 10W, IP67, .5uJ, 10kA, Filter AL-LSXM PolyPhaser 1: £57.57 35In Stock New Product	Mfr. Part No. AL-LSXM Mouser Part No 44-AL-LSXM New Product	PolyPhaser	Connectorised Surge Protectors Type N F/F Bulkhead Coaxial RF Surge Protector, 2GHz - 6GHz, DC Block, 10W, IP67, .5uJ, 10kA, Filter Learn More about PolyPhaser 2ghz 6ghz surge protectors	Datasheet	35In Stock	£57.57 £54.50	Min.: 1 Mult.: 1
Connectorised Surge Protectors Type N F/F Coaxial RF Surge Protector, 400MHz - 1.2GHz, 300W, IP67, 36 V Max., 1.5mJ, 20kA, Hybrid, Bracket Down, Hole Mount CGXZ+36NFNF-A PolyPhaser 1: £127.96 43In Stock New Product	Mfr. Part No. CGXZ+36NFNF-A Mouser Part No 44-CGXZ+36NFNF-A New Product	PolyPhaser	Connectorised Surge Protectors Type N F/F Coaxial RF Surge Protector, 400MHz - 1.2GHz, 300W, IP67, 36 V Max., 1.5mJ, 20kA, Hybrid, Bracket Down, Hole Mount Learn More about PolyPhaser 400mhz 2 5ghz surge protectors	Datasheet	43In Stock	£127.96 £121.36	Min.: 1 Mult.: 1
Connectorised Surge Protectors Type N M/F Coaxial RF Surge Protector, 400MHz - 1.2GHz, 300W, IP67, 36 V Max., 1mJ, 20kA, Hybrid, Bracket Down, Hole Mount CGXZ+36NMNF-A PolyPhaser 1: £140.88 12In Stock New Product	Mfr. Part No. CGXZ+36NMNF-A Mouser Part No 44-CGXZ+36NMNF-A New Product	PolyPhaser	Connectorised Surge Protectors Type N M/F Coaxial RF Surge Protector, 400MHz - 1.2GHz, 300W, IP67, 36 V Max., 1mJ, 20kA, Hybrid, Bracket Down, Hole Mount Learn More about PolyPhaser 400mhz 2 5ghz surge protectors	Datasheet	12In Stock	£140.88 £133.62	Min.: 1 Mult.: 1
Connectorised Surge Protectors Type N F/M Coaxial RF Surge Protector, 1.5MHz - 700MHz, DC Block, 2kW, 10mJ, 50kA, Blocking Cap, Bracket Up, Hole Mount IS-50NX-C0-ME PolyPhaser 1: £82.72 30In Stock New Product	Mfr. Part No. IS-50NX-C0-ME Mouser Part No 44-IS-50NX-C0-ME New Product	PolyPhaser	Connectorised Surge Protectors Type N F/M Coaxial RF Surge Protector, 1.5MHz - 700MHz, DC Block, 2kW, 10mJ, 50kA, Blocking Cap, Bracket Up, Hole Mount Learn More about PolyPhaser 1 5mhz 6ghz surge protectors	Datasheet	30In Stock	£82.72 £78.45	Min.: 1 Mult.: 1
Connectorised Surge Protectors UHF F/F Bulkhead Coaxial RF Surge Protector, 1.5MHz - 700MHz, DC Block, 3kW, 20mJ, 50kA, Blocking Cap, Hole Mount IS-B50HU-C0 PolyPhaser 1: £104.69 14In Stock New Product	Mfr. Part No. IS-B50HU-C0 Mouser Part No 44-IS-B50HU-C0 New Product	PolyPhaser	Connectorised Surge Protectors UHF F/F Bulkhead Coaxial RF Surge Protector, 1.5MHz - 700MHz, DC Block, 3kW, 20mJ, 50kA, Blocking Cap, Hole Mount Learn More about PolyPhaser 1 5mhz 6ghz surge protectors	Datasheet	14In Stock	£104.69 £99.30	Min.: 1 Mult.: 1
Connectorised Surge Protectors Type N M/F Coaxial RF Surge Protector, 100MHz - 512MHz, DC Block, 750W, IP67, .5uJ, 20kA, Filter, Bracket Down, Hole Mount VHF50HN-MA PolyPhaser 1: £124.07 29In Stock New Product	Mfr. Part No. VHF50HN-MA Mouser Part No 44-VHF50HN-MA New Product	PolyPhaser	Connectorised Surge Protectors Type N M/F Coaxial RF Surge Protector, 100MHz - 512MHz, DC Block, 750W, IP67, .5uJ, 20kA, Filter, Bracket Down, Hole Mount Learn More about PolyPhaser 100mhz 512mhz surge protectors	Datasheet	29In Stock	£124.07 £117.69	Min.: 1 Mult.: 1
Circuit Breakers E 3P 100A 40kA 415 35kA 480V FXD therm EGS3100FFG Eaton Electrical 1: £1,107.85 2In Stock New Product	Mfr. Part No. EGS3100FFG Mouser Part No 504-EGS3100FFG New Product	Eaton Electrical	Circuit Breakers E 3P 100A 40kA 415 35kA 480V FXD therm	Datasheet	2In Stock	£1,107.85	Min.: 1 Mult.: 1
Circuit Breakers PDG2,2P,125A,50KA/480V,FXFXTMTU PDG22K0125TFFJ Eaton Electrical 1: £744.30 4In Stock New Product	Mfr. Part No. PDG22K0125TFFJ Mouser Part No 504-PDG22K0125TFFJ New Product	Eaton Electrical	Circuit Breakers PDG2,2P,125A,50KA/480V,FXFXTMTU	Datasheet	4In Stock	£744.30	Min.: 1 Mult.: 1
Circuit Breakers PDG3 PXR25 LSI THREE POLE 600A PDG3XPXR30600P2M Eaton Electrical 1: £2,433.84 1In Stock New Product	Mfr. Part No. PDG3XPXR30600P2M Mouser Part No 504-PDG3XPXR30600P2M New Product	Eaton Electrical	Circuit Breakers PDG3 PXR25 LSI THREE POLE 600A	Datasheet	1In Stock	£2,433.84	Min.: 1 Mult.: 1
Circuit Breakers QBHW2015, 2P, 15A 22kAIC, 240V QBHW2015HT Eaton Electrical 1: £743.98 3In Stock New Product	Mfr. Part No. QBHW2015HT Mouser Part No 504-QBHW2015HT New Product	Eaton Electrical	Circuit Breakers QBHW2015, 2P, 15A 22kAIC, 240V	Datasheet	3In Stock	£743.98 £594.43 £567.48 View Quote	Min.: 1 Mult.: 1
Connectorised Surge Protectors Type N F/F Coaxial RF Surge Protector, 400MHz - 1.2GHz, 300W, IP67, 15 V Max., 500uJ, 20kA, Hybrid, Bracket Down, Hole Mount CGXZ+15NFNF-A PolyPhaser 1: £127.96 19In Stock New Product	Mfr. Part No. CGXZ+15NFNF-A Mouser Part No 44-CGXZ+15NFNF-A New Product	PolyPhaser	Connectorised Surge Protectors Type N F/F Coaxial RF Surge Protector, 400MHz - 1.2GHz, 300W, IP67, 15 V Max., 500uJ, 20kA, Hybrid, Bracket Down, Hole Mount Learn More about PolyPhaser 400mhz 2 5ghz surge protectors	Datasheet	19In Stock	£127.96 £121.36	Min.: 1 Mult.: 1

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