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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.
Varistors 20mm Radial Disc-Kinked Leads,Bulk MOV-20D182KKC Bourns 1: £2.56 200In Stock New Product	Mfr. Part No. MOV-20D182KKC Mouser Part No 652-MOV-20D182KKC New Product	Bourns	Varistors 20mm Radial Disc-Kinked Leads,Bulk Learn More about Bourns mov kc metal oxide varistors	Datasheet	200In Stock	£2.56 £1.62 £1.26 £1.17 View £1.03 £0.863 £0.841	Min.: 1 Mult.: 1
NTC (Negative Temperature Coefficient) Thermistors NTC SMD 0805 10K B25/85 3970 BTN08G103J3VH2T00 Bourns 1: £0.12 2,800In Stock New Product	Mfr. Part No. BTN08G103J3VH2T00 Mouser Part No 652-TN08G103J3VH2T00 New Product	Bourns	NTC (Negative Temperature Coefficient) Thermistors NTC SMD 0805 10K B25/85 3970 Learn More about Bourns btn08g smd ntc thermistors	Datasheet	2,800In Stock	Cut Tape £0.12 £0.106 £0.098 £0.078 Reel £0.046 View £0.072 £0.06 £0.054 £0.044 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
ESD Protection Diodes / TVS Diodes 18V, Uni-directional, 20A-80A SVS1871P3UU.N Semtech 1: £0.518 8,000In Stock New Product	Mfr. Part No. SVS1871P3UU.N Mouser Part No 947-SVS1871P3UU.N New Product	Semtech	ESD Protection Diodes / TVS Diodes 18V, Uni-directional, 20A-80A		8,000In Stock	Cut Tape £0.518 £0.323 £0.207 £0.154 Reel £0.089 View £0.125 £0.107 £0.106 £0.085 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
Circuit Breakers 8340-F410-P1M1-ALH0-5A E-T-A 1: £63.83 9In Stock 20Expected 01/01/2027 New At Mouser	Mfr. Part No. 8340-F410-P1M1-ALH0-5A Mouser Part No 457-4F410P1M1ALH05A New At Mouser	E-T-A	Circuit Breakers		9In Stock 20Expected 01/01/2027	£63.83 £52.95 £49.79 £41.48 View £38.74 £38.73 Quote	Min.: 1 Mult.: 1
ESD Protection Diodes / TVS Diodes 30V, 100A ,DNF2020-6L SC3000-01UTG Littelfuse 1: £1.39 3,000In Stock New Product	Mfr. Part No. SC3000-01UTG Mouser Part No 576-SC3000-01UTG New Product	Littelfuse	ESD Protection Diodes / TVS Diodes 30V, 100A ,DNF2020-6L Learn More about Littelfuse tvs spa diode arrays	Datasheet	3,000In Stock	Cut Tape £1.39 £0.871 £0.571 £0.441 Reel £0.355 View £0.374 £0.327 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
NTC (Negative Temperature Coefficient) Thermistors NTC SMD 0603 10kO 1% B25/50 3380K BTN06G103F3HF1T0A Bourns 1: £0.098 7,775In Stock New Product	Mfr. Part No. BTN06G103F3HF1T0A Mouser Part No 652-BTN06103F3HF1T0A New Product	Bourns	NTC (Negative Temperature Coefficient) Thermistors NTC SMD 0603 10kO 1% B25/50 3380K Learn More about Bourns btn06g ntc thermistors	Datasheet	7,775In Stock	Cut Tape £0.098 £0.088 £0.078 £0.064 Reel £0.048 View £0.057 £0.053 £0.045 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
NTC (Negative Temperature Coefficient) Thermistors NTC SMD 0603 100kO 1% B25/50 4250K BTN06G104F4EF1T0A Bourns 1: £0.12 8,000In Stock New Product	Mfr. Part No. BTN06G104F4EF1T0A Mouser Part No 652-BTN06104F4EF1T0A New Product	Bourns	NTC (Negative Temperature Coefficient) Thermistors NTC SMD 0603 100kO 1% 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
NTC (Negative Temperature Coefficient) Thermistors NTC SMD 0603 100kO 5% B25/50 4250K BTN06G104J4EH1T0A Bourns 1: £0.113 7,990In Stock New Product	Mfr. Part No. BTN06G104J4EH1T0A Mouser Part No 652-BTN06104J4EH1T0A New Product	Bourns	NTC (Negative Temperature Coefficient) Thermistors NTC SMD 0603 100kO 5% B25/50 4250K Learn More about Bourns btn06g ntc thermistors	Datasheet	7,990In Stock	Cut Tape £0.113 £0.10 £0.088 £0.071 Reel £0.053 View £0.062 £0.059 £0.051 £0.049 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
ESD Protection Diodes / TVS Diodes 10V, Uni-directional, 20A-80A SVS1071P3UU.N Semtech 1: £0.518 8,000In Stock New Product	Mfr. Part No. SVS1071P3UU.N Mouser Part No 947-SVS1071P3UU.N New Product	Semtech	ESD Protection Diodes / TVS Diodes 10V, Uni-directional, 20A-80A		8,000In Stock	Cut Tape £0.518 £0.323 £0.207 £0.154 Reel £0.089 View £0.125 £0.107 £0.106 £0.085 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
ESD Protection Diodes / TVS Diodes UCLAMP3311T 3.3V SLP-10K UCLAMP3311T.TNT Semtech 1: £0.684 4,529In Stock New Product	Mfr. Part No. UCLAMP3311T.TNT Mouser Part No 947-UCLAMP3311T.TNT New Product	Semtech	ESD Protection Diodes / TVS Diodes UCLAMP3311T 3.3V SLP-10K	Datasheet	4,529In Stock	Cut Tape £0.684 £0.424 £0.277 £0.209 View Reel £0.134 £0.19 £0.175 £0.169 £0.134 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
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 509In Stock 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	509In Stock	£140.92 £134.96	Min.: 1 Mult.: 1
Connectorised Surge Protectors Type N F/F Bulkhead Coaxial RF Surge Protector, DC - 6GHz, 90W, IP67, 60 V Max., 5mJ, 20kA, Gas Discharge Tube GT-NFF-AL PolyPhaser 1: £58.91 534In Stock 467On Order New Product	Mfr. Part No. GT-NFF-AL Mouser Part No 44-GT-NFF-AL New Product	PolyPhaser	Connectorised Surge Protectors Type N F/F Bulkhead Coaxial RF Surge Protector, DC - 6GHz, 90W, IP67, 60 V Max., 5mJ, 20kA, Gas Discharge Tube Learn More about PolyPhaser dc 7ghz rf coaxial surge protectors	Datasheet	534In Stock 467On Order On Order Ship Dates Mfr. No: GT-NFF-AL Stock: 534 Can Dispatch Immediately On Order: 252 Expected 30/10/2026 50 Expected 26/11/2026 165 Expected 04/12/2026 Factory Lead Time: 8 Weeks	£58.91 £55.77	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/F Bulkhead Coaxial RF Surge Protector, 698MHz - 2.7GHz, DC Block, 500W, IP67, .005uJ, 40kA, Filter TSX-NFF PolyPhaser 1: £127.96 109In Stock 158On Order 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	109In Stock 158On Order On Order Ship Dates Mfr. No: TSX-NFF Stock: 109 Can Dispatch Immediately On Order: 68 Expected 03/11/2026 60 Expected 12/11/2026 30 Expected 13/11/2026 Factory Lead Time: 3 Weeks	£127.96 £121.36	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 483In Stock 50Expected 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	483In Stock 50Expected 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 389In 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	389In Stock	£120.20 £114.01	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: £0.428 2,372In 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	2,372In Stock	Cut Tape £0.428 £0.202 £0.17 £0.127 Reel £0.068 View £0.114 £0.067 £0.059 £0.057	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 Coaxial RF Surge Protector, 40MHz - 400MHz, 100W, IP67, 60 V Max., 2.5mJ, 20kA, Hybrid, Bracket Down, Hole Mount BGXZ-60NFNF-ALT PolyPhaser 1: £135.01 72In Stock New Product	Mfr. Part No. BGXZ-60NFNF-ALT Mouser Part No 44-BGXZ-60NFNF-ALT New Product	PolyPhaser	Connectorised Surge Protectors Type N F/F Coaxial RF Surge Protector, 40MHz - 400MHz, 100W, IP67, 60 V Max., 2.5mJ, 20kA, Hybrid, Bracket Down, Hole Mount Learn More about PolyPhaser 40mhz 400mhz surge protectors	Datasheet	72In Stock	£135.01 £129.29	Min.: 1 Mult.: 1
Connectorised Surge Protectors Type N F/M Bulkhead Coaxial RF Surge Protector, 1.2GHz - 1.6GHz, 10W, IP67, 6 V Max., 175uJ, 15kA, Avalanche Diode GPS+06NFM PolyPhaser 1: £99.51 27In Stock New Product	Mfr. Part No. GPS+06NFM Mouser Part No 44-GPS+06NFM New Product	PolyPhaser	Connectorised Surge Protectors Type N F/M Bulkhead Coaxial RF Surge Protector, 1.2GHz - 1.6GHz, 10W, IP67, 6 V Max., 175uJ, 15kA, Avalanche Diode Learn More about PolyPhaser 1 5mhz 6ghz surge protectors	Datasheet	27In Stock	£99.51 £94.39	Min.: 1 Mult.: 1
Surge Protection Accessories Ground Strap Adapter Kit for SX Series N Connectors GSA-KIT-N PolyPhaser 1: £46.19 74In Stock New Product	Mfr. Part No. GSA-KIT-N Mouser Part No 44-GSA-KIT-N New Product	PolyPhaser	Surge Protection Accessories Ground Strap Adapter Kit for SX Series N Connectors Learn More about PolyPhaser surge protector accessories	Datasheet	74In Stock	£46.19 £43.73	Min.: 1 Mult.: 1
Connectorised Surge Protectors RF Surge Protector SPD, SMA F/F, DC - 6GHz, 150W, 60 V Max., 10kA, Gas Discharge Tube GTH-SFF-AL PolyPhaser 1: £55.56 76In Stock 95On Order New Product	Mfr. Part No. GTH-SFF-AL Mouser Part No 44-GTH-SFF-AL New Product	PolyPhaser	Connectorised Surge Protectors RF Surge Protector SPD, SMA F/F, DC - 6GHz, 150W, 60 V Max., 10kA, Gas Discharge Tube	Datasheet	76In Stock 95On Order On Order Ship Dates Mfr. No: GTH-SFF-AL Stock: 76 Can Dispatch Immediately On Order: 67 Expected 27/11/2026 28 Expected 25/12/2026 Factory Lead Time: 8 Weeks	£55.56 £52.60	Min.: 1 Mult.: 1

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Circuit Protection

Types of Circuit Protection