Circuit Protection – Mouser United Kingdom

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Ethernet ESD, Lightning, & Power Fault Protection

Littelfuse Ethernet/PoE ESD, EFT, Lightning, and Power Fault Protection ensures that the power fault overcurrent can be protected with Telelink fuses. The Ethernet Power Fault Protection includes the SMCJ and SP40 TVS Diode, SP3, SRV05xx, LC03xx, and SP40xx Diode Array, and the 0461xxx Fuse series. Littelfuse Ethernet/PoE ESD, EFT, Lightning, and Power Fault Protection products meet various applicable standards.

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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.
ESD Protection Diodes / TVS Diodes .3pF 10KV 18V 0201 Flipchip SP3118-01WTG Littelfuse 1: £0.473 6,591In Stock	Mfr. Part No. SP3118-01WTG Mouser Part No 576-SP3118-01WTG	Littelfuse	ESD Protection Diodes / TVS Diodes .3pF 10KV 18V 0201 Flipchip Learn More about Littelfuse sp3118 arrays	Datasheet	6,591In Stock	Cut Tape £0.473 £0.213 £0.188 £0.142 View Reel £0.082 £0.131 £0.122 £0.12 £0.082 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP BIPOLAR SURGE ARRESTOR MS CG5230MS Littelfuse 1: £2.36 353In Stock	Mfr. Part No. CG5230MS Mouser Part No 576-CG5230MS	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP BIPOLAR SURGE ARRESTOR MS	Datasheet	353In Stock	Cut Tape £2.36 £1.96 £1.81 £1.50 Reel £1.20 View £1.38 £1.27 £1.25 £1.19 MouseReel Available	Min.: 1 Mult.: 1 : 900
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors STANDARD 350V NOM CG5350L Littelfuse 1: £2.62 788In Stock	Mfr. Part No. CG5350L Mouser Part No 576-CG5350L	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors STANDARD 350V NOM	Datasheet	788In Stock	Cut Tape £2.62 £2.17 £2.01 £1.67 View Reel £1.18 £1.54 £1.38 £1.27 £1.18	Min.: 1 Mult.: 1 : 1,000
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 90V CG590LS Littelfuse 1: £2.03 668In Stock	Mfr. Part No. CG590LS Mouser Part No 576-CG590LS	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STAN 90V	Datasheet	668In Stock	Cut Tape £2.03 £1.69 £1.56 £1.29 View Reel £0.995 £1.20 £1.07 £0.995	Min.: 1 Mult.: 1 : 900
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors STANDARD 90V MS CG590MS Littelfuse 1: £2.44 56In Stock 900Expected 10/11/2026	Mfr. Part No. CG590MS Mouser Part No 576-CG590MS	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors STANDARD 90V MS	Datasheet	56In Stock 900Expected 10/11/2026	Cut Tape £2.44 £2.08 £1.91 £1.59 View Reel £1.18 £1.47 £1.34 £1.18 £1.18 MouseReel Available	Min.: 1 Mult.: 1 : 900
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 230V SMD Ultra Low 0.3pF CG6230SM Littelfuse 1: £2.03 28In Stock	Mfr. Part No. CG6230SM Mouser Part No 576-CG6230SM	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 230V SMD Ultra Low 0.3pF Learn More about Littelfuse CG6 CG7 SMD gas discharge tubes	Datasheet	28In Stock	Cut Tape £2.03 £1.98 £1.83 £1.52 View Reel £0.978 £1.34 £1.26 £1.10 £0.995 £0.978 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 105-195V 2A GDT T/R 2 Term SG150 Littelfuse 1: £1.02 977In Stock 2,000Expected 06/11/2026	Mfr. Part No. SG150 Mouser Part No 576-SG150	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 105-195V 2A GDT T/R 2 Term Learn More about Littelfuse sg series sgdt	Datasheet	977In Stock 2,000Expected 06/11/2026	Cut Tape £1.02 £0.943 £0.78 £0.721 £0.69 Reel £0.69 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 172-288V 2A GDT T/R 2 Term SG230 Littelfuse 1: £1.07 343In Stock 4,000Expected 24/02/2027	Mfr. Part No. SG230 Mouser Part No 576-SG230	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 172-288V 2A GDT T/R 2 Term Learn More about Littelfuse sg series sgdt	Datasheet	343In Stock 4,000Expected 24/02/2027	Cut Tape £1.07 £0.995 £0.818 £0.759 View Reel £0.538 £0.678 £0.625 £0.576 £0.538 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 450-750V 2A GDT T/R 2 Term SG600Q Littelfuse 1: £0.969 1,244In Stock 2,000Expected 25/03/2027	Mfr. Part No. SG600Q Mouser Part No 576-SG600Q	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 450-750V 2A GDT T/R 2 Term	Datasheet	1,244In Stock 2,000Expected 25/03/2027	Cut Tape £0.969 £0.89 £0.737 £0.716 Reel £0.716 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 52-98V 2A GDT T/R 2 Term SG75 Littelfuse 1: £1.02 1,601In Stock 30,000On Order	Mfr. Part No. SG75 Mouser Part No 576-SG75	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 52-98V 2A GDT T/R 2 Term Learn More about Littelfuse sg series sgdt	Datasheet	1,601In Stock 30,000On Order On Order Ship Dates Mfr. No: SG75 Stock: 1,601 Can Dispatch Immediately On Order: 8,000 Expected 10/11/2026 10,000 Expected 01/02/2027 12,000 Expected 11/02/2027 Factory Lead Time: 17 Weeks	Cut Tape £1.02 £0.943 £0.78 £0.721 £0.653 Reel £0.653 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
ESD Protection Diodes / TVS Diodes 5V 1uA 8kV BIDIRECTIONAL SP3021-01ETG Littelfuse 1: £0.421 11,585In Stock 10,000Expected 12/01/2027	Mfr. Part No. SP3021-01ETG Mouser Part No 576-SP3021-01ETG	Littelfuse	ESD Protection Diodes / TVS Diodes 5V 1uA 8kV BIDIRECTIONAL Learn More about Littelfuse sp3021 tvs diode array	Datasheet	11,585In Stock 10,000Expected 12/01/2027	Cut Tape £0.421 £0.186 £0.163 £0.122 Reel £0.089 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
ESD Protection Diodes / TVS Diodes 1 Ch 22kV 9.2V .15pF SOD882 SP3522-01ETG Littelfuse 1: £0.338 4,838In Stock 140,000On Order	Mfr. Part No. SP3522-01ETG Mouser Part No 576-SP3522-01ETG	Littelfuse	ESD Protection Diodes / TVS Diodes 1 Ch 22kV 9.2V .15pF SOD882 Learn More about Littelfuse sp3522	Datasheet	4,838In Stock 140,000On Order On Order Ship Dates Mfr. No: SP3522-01ETG Stock: 4,838 Can Dispatch Immediately On Order: 50,000 Expected 09/11/2026 90,000 Expected 21/04/2027 Factory Lead Time: 19 Weeks	Cut Tape £0.338 £0.151 £0.132 £0.099 View Reel £0.059 £0.088 £0.08 £0.077 £0.059 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
ESD Protection Diodes / TVS Diodes 1 Ch 22kV 8.2V .3pF UNI 0201 DFN SP3530-01UTG Littelfuse 1: £0.233 13,730In Stock	Mfr. Part No. SP3530-01UTG Mouser Part No 576-SP3530-01UTG	Littelfuse	ESD Protection Diodes / TVS Diodes 1 Ch 22kV 8.2V .3pF UNI 0201 DFN Learn More about Littelfuse sp3530	Datasheet	13,730In Stock	Cut Tape £0.233 £0.104 £0.09 £0.067 View Reel £0.045 £0.064 £0.062 £0.058 £0.045 £0.045 MouseReel Available	Min.: 1 Mult.: 1 : 15,000
ESD Protection Diodes / TVS Diodes 2.5pF 30A BI for Surge Protection SP4020-01FTG-C Littelfuse 1: £0.943 223In Stock 81,000On Order	Mfr. Part No. SP4020-01FTG-C Mouser Part No 576-SP4020-01FTG-C	Littelfuse	ESD Protection Diodes / TVS Diodes 2.5pF 30A BI for Surge Protection Learn More about Littelfuse lightning tvs spa diodes	Datasheet	223In Stock 81,000On Order On Order Ship Dates Mfr. No: SP4020-01FTG-C Stock: 223 Can Dispatch Immediately On Order: 30,000 Expected 07/12/2026 51,000 Expected 05/07/2027 Factory Lead Time: 29 Weeks	Cut Tape £0.943 £0.468 £0.368 £0.276 £0.266 Reel £0.211 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
ESD Protection Diodes / TVS Diodes 1.3pF 12A UNIDIRECTIONAL SP4023-01FTG Littelfuse 1: £0.668 2,113In Stock 3,000Expected 10/11/2026	Mfr. Part No. SP4023-01FTG Mouser Part No 576-SP4023-01FTG	Littelfuse	ESD Protection Diodes / TVS Diodes 1.3pF 12A UNIDIRECTIONAL Learn More about Littelfuse sp402x arrays	Datasheet	2,113In Stock 3,000Expected 10/11/2026	Cut Tape £0.668 £0.365 £0.268 £0.203 £0.196 Reel £0.144 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
ESD Protection Diodes / TVS Diodes 8 Ch 30kV 2.5V 4.4pF SP4060-08ATG Littelfuse 1: £1.58 2,063In Stock	Mfr. Part No. SP4060-08ATG Mouser Part No 576-SP4060-08ATG	Littelfuse	ESD Protection Diodes / TVS Diodes 8 Ch 30kV 2.5V 4.4pF Learn More about Littelfuse lightning tvs spa diodes	Datasheet	2,063In Stock	Cut Tape £1.58 £1.06 £0.796 £0.617 View Reel £0.434 £0.501 £0.47 £0.434 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
ESD Protection Diodes / TVS Diodes ESD 6V UNI SRV05-4HTG-D Littelfuse 1: £1.10 3,193In Stock 108,000On Order	Mfr. Part No. SRV05-4HTG-D Mouser Part No 576-SRV05-4HTG-D	Littelfuse	ESD Protection Diodes / TVS Diodes ESD 6V UNI Learn More about Littelfuse srv05 diode arrays	Datasheet	3,193In Stock 108,000On Order On Order Ship Dates Mfr. No: SRV05-4HTG-D Stock: 3,193 Can Dispatch Immediately On Order: 27,000 Expected 23/12/2026 36,000 Expected 03/02/2027 45,000 Expected 01/03/2027 Factory Lead Time: 29 Weeks	Cut Tape £1.10 £0.712 £0.603 £0.437 View Reel £0.269 £0.351 £0.306 £0.269 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 225-375V 2A GDT T/R 2 Term SG300 Littelfuse 1: £0.969 19,985On Order	Mfr. Part No. SG300 Mouser Part No 576-SG300	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 225-375V 2A GDT T/R 2 Term Learn More about Littelfuse sg series sgdt	Datasheet	19,985On Order On Order Ship Dates Mfr. No: SG300 Stock: 0 On Order: 9,985 Expected 01/03/2027 6,000 Expected 03/03/2027 4,000 Expected 04/03/2027 Factory Lead Time: 17 Weeks	Cut Tape £0.969 £0.89 £0.737 £0.679 View Reel £0.538 £0.611 £0.575 £0.538 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
ESD Protection Diodes / TVS Diodes 4CH 20A 3.3V 3.5pF Lightning Protection SP3304NUTG Littelfuse 1: £1.89 21,000On Order	Mfr. Part No. SP3304NUTG Mouser Part No 576-SP3304NUTG	Littelfuse	ESD Protection Diodes / TVS Diodes 4CH 20A 3.3V 3.5pF Lightning Protection Learn More about Littelfuse lightning tvs spa diodes	Datasheet	21,000On Order On Order Ship Dates Mfr. No: SP3304NUTG Stock: 0 On Order: 12,000 Expected 28/12/2026 9,000 Expected 04/01/2027 Factory Lead Time: 73 Weeks	Cut Tape £1.89 £1.11 £0.803 £0.693 £0.559 Reel £0.559 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
ESD Protection Diodes / TVS Diodes 2.5pF 30A for Surge Protection SP4020-01FTG Littelfuse 1: £0.841 280,767On Order	Mfr. Part No. SP4020-01FTG Mouser Part No 576-SP4020-01FTG	Littelfuse	ESD Protection Diodes / TVS Diodes 2.5pF 30A for Surge Protection Learn More about Littelfuse lightning tvs spa diodes	Datasheet	280,767On Order On Order Ship Dates Mfr. No: SP4020-01FTG Stock: 0 On Order: 22,767 Expected 07/12/2026 81,000 Expected 04/02/2027 84,000 Expected 22/03/2027 93,000 Expected 26/04/2027 Factory Lead Time: 29 Weeks	Cut Tape £0.841 £0.454 £0.345 £0.258 £0.247 Reel £0.192 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
ESD Protection Diodes / TVS Diodes 2.5pF 25A for Surge Protection SP4021-01FTG Littelfuse 1: £0.78 99,930On Order	Mfr. Part No. SP4021-01FTG Mouser Part No 576-SP4021-01FTG	Littelfuse	ESD Protection Diodes / TVS Diodes 2.5pF 25A for Surge Protection Learn More about Littelfuse lightning tvs spa diodes	Datasheet	99,930On Order On Order Ship Dates Mfr. No: SP4021-01FTG Stock: 0 On Order: 24,930 Expected 18/01/2027 75,000 Expected 01/03/2027 Factory Lead Time: 29 Weeks	Cut Tape £0.78 £0.434 £0.306 £0.25 £0.234 Reel £0.173 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
ESD Protection Diodes / TVS Diodes 2.5pF 25A BI for Surge Protection SP4021-01FTG-C Littelfuse 1: £0.788 269,720On Order	Mfr. Part No. SP4021-01FTG-C Mouser Part No 576-SP4021-01FTG-C	Littelfuse	ESD Protection Diodes / TVS Diodes 2.5pF 25A BI for Surge Protection Learn More about Littelfuse lightning tvs spa diodes	Datasheet	269,720On Order On Order Ship Dates Mfr. No: SP4021-01FTG-C Stock: 0 On Order: 86,720 Expected 29/12/2026 183,000 Expected 29/03/2027 Factory Lead Time: 29 Weeks	Cut Tape £0.788 £0.362 £0.32 £0.247 £0.235 Reel £0.192 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 90V SMD Ultra Low 0.3pF CG690SM Littelfuse 1: £1.99 1,631Expected 15/03/2027	Mfr. Part No. CG690SM Mouser Part No 576-CG690SM	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 90V SMD Ultra Low 0.3pF Learn More about Littelfuse CG6 CG7 SMD gas discharge tubes	Datasheet	1,631Expected 15/03/2027	Cut Tape £1.99 £1.65 £1.53 £1.27 View Reel £0.978 £1.17 £1.05 £0.978 £0.978 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
ESD Protection Diodes / TVS Diodes 75A 30KV 3.3V Lightning Protection SP2502LBTG Littelfuse 1: £2.38 4,000Expected 19/01/2027	Mfr. Part No. SP2502LBTG Mouser Part No 576-SP2502LBTG	Littelfuse	ESD Protection Diodes / TVS Diodes 75A 30KV 3.3V Lightning Protection Learn More about Littelfuse lightning tvs spa diodes	Datasheet	4,000Expected 19/01/2027	Cut Tape £2.38 £1.55 £1.20 £1.07 View Reel £0.723 £0.871 £0.766 £0.723 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
ESD Protection Diodes / TVS Diodes 4CH 20A 2.5V 3.5pF Lightning Protection SP2504NUTG Littelfuse 1: £1.92 4,200Expected 28/12/2026	Mfr. Part No. SP2504NUTG Mouser Part No 576-SP2504NUTG	Littelfuse	ESD Protection Diodes / TVS Diodes 4CH 20A 2.5V 3.5pF Lightning Protection Learn More about Littelfuse lightning tvs spa diodes	Datasheet	4,200Expected 28/12/2026	Cut Tape £1.92 £1.24 £0.978 £0.849 £0.672 Reel £0.583 MouseReel Available	Min.: 1 Mult.: 1 : 3,000