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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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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (USD) Filter the results in the table by unit price based on your quantity.	Qty.
Resettable Fuses - PPTC Fuse 0ZCF0185FF2C Bel Fuse 1: $0.32 139,450In Stock	Mfr. Part No. 0ZCF0185FF2C Mouser Part No 530-0ZCF0185FF2C	Bel Fuse	Resettable Fuses - PPTC Fuse Learn More about Bel Fuse 0zcf resettable pptc fuses	Datasheet	139,450In Stock	Cut Tape $0.32 $0.25 $0.228 $0.214 Reel $0.165 View $0.202 $0.18 $0.152 $0.133 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Surface Mount Fuses 125VAC 3A .034ohms 452 NANO2 0452003.NRL Littelfuse 1: $3.27 12,960In Stock	Mfr. Part No. 0452003.NRL Mouser Part No 576-0452003.NRL	Littelfuse	Surface Mount Fuses 125VAC 3A .034ohms 452 NANO2 Learn More about Littelfuse 452 454 smt fuses	Datasheet	12,960In Stock	Cut Tape $3.27 $2.76 $2.23 $1.91 View Reel $1.38 $1.84 $1.58 $1.46 $1.38 $1.38 MouseReel Available	Min.: 1 Mult.: 1 : 5,000
Surface Mount Fuses 32VAC 5A .027ohms 458 NANO2 0458005.DR Littelfuse 1: $2.34 13,484In Stock	Mfr. Part No. 0458005.DR Mouser Part No 576-0458005.DR	Littelfuse	Surface Mount Fuses 32VAC 5A .027ohms 458 NANO2 Learn More about Littelfuse nano fuses	Datasheet	13,484In Stock	Cut Tape $2.34 $2.08 $1.44 $1.33 View Reel $1.02 $1.22 $1.11 $1.02 MouseReel Available	Min.: 1 Mult.: 1 : 1,500
Cartridge Fuses 500V 50A Thru-Hole RoHS 0526050.UXTHP Littelfuse 1: $27.64 986In Stock	Mfr. Part No. 0526050.UXTHP Mouser Part No 576-0526050.UXTHP	Littelfuse	Cartridge Fuses 500V 50A Thru-Hole RoHS Learn More about Littelfuse 526 527 cartridge fuses	Datasheet	986In Stock	$27.64 $22.93 $21.07 $17.53 View $16.15 $14.92 $14.91	Min.: 1 Mult.: 1
Automotive Fuses 30A Low Profile 0895030.Z Littelfuse 1: $2.62 11,961In Stock	Mfr. Part No. 0895030.Z Mouser Part No 576-0895030.Z	Littelfuse	Automotive Fuses 30A Low Profile	Datasheet	11,961In Stock	$2.62 $2.17 $1.86 $1.66 View $1.45 $1.32 $1.15 $1.12 $1.11	Min.: 1 Mult.: 1
Automotive Fuses STRIP 30 80A W/O HOUSING 156.5610.5801 Littelfuse 1: $1.33 29,305In Stock	Mfr. Part No. 156.5610.5801 Mouser Part No 576-156.5610.5801	Littelfuse	Automotive Fuses STRIP 30 80A W/O HOUSING	Datasheet	29,305In Stock	$1.33 $1.11 $1.02 $0.845 View $0.633 $0.547 $0.53	Min.: 1 Mult.: 1
Resettable Fuses - PPTC 1.85A 33V 2920 2920L185DR Littelfuse 1: $0.82 45,283In Stock 40,500Expected 24/12/2026	Mfr. Part No. 2920L185DR Mouser Part No 576-2920L185	Littelfuse	Resettable Fuses - PPTC 1.85A 33V 2920 Learn More about Littelfuse 2920l polyswitch resettable fuses	Datasheet	45,283In Stock 40,500Expected 24/12/2026	Cut Tape $0.82 $0.71 $0.623 $0.575 Reel $0.33 View $0.517 $0.477 $0.32 MouseReel Available	Min.: 1 Mult.: 1 : 1,500
Fuse Holder HWB18 w/ TPAs PDM31002ZXM Littelfuse 1: $40.16 821In Stock 36Expected 09/11/2026	Mfr. Part No. PDM31002ZXM Mouser Part No 576-PDM31002ZXM	Littelfuse	Fuse Holder HWB18 w/ TPAs Learn More about Littelfuse hwb18	Datasheet	821In Stock 36Expected 09/11/2026	$40.16 $33.32 $30.74 $25.46 View $23.47 $21.05	Min.: 1 Mult.: 1
ESD Protection Diodes / TVS Diodes 20V 2.2A 4 CHANNEL SP724AHTG Littelfuse 1: $1.92 106,575In Stock	Mfr. Part No. SP724AHTG Mouser Part No 576-SP724AHTG	Littelfuse	ESD Protection Diodes / TVS Diodes 20V 2.2A 4 CHANNEL Learn More about Littelfuse lightning tvs spa diodes	Datasheet	106,575In Stock	Cut Tape $1.92 $1.21 $1.03 $0.958 View Reel $0.733 $0.851 $0.84 $0.733 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
Circuit Breakers TMC 81C 20A 2907573 Phoenix Contact 1: $21.57 1,641In Stock	Mfr. Part No. 2907573 Mouser Part No 651-2907573	Phoenix Contact	Circuit Breakers TMC 81C 20A Learn More about Phoenix Contact TMC thermomagnetic circuit breakers	Datasheet	1,641In Stock	$21.57	Min.: 1 Mult.: 1
Resettable Fuses - PPTC 15V 100MA-HD 40A MAX MF-FSMF010X-2 Bourns 1: $0.45 104,663In Stock	Mfr. Part No. MF-FSMF010X-2 Mouser Part No 652-MF-FSMF010X-2	Bourns	Resettable Fuses - PPTC 15V 100MA-HD 40A MAX Learn More about Bourns multifuse	Datasheet	104,663In Stock	Cut Tape $0.45 $0.323 $0.29 $0.251 View Reel $0.20 $0.23 $0.217 $0.206 $0.201 $0.20 MouseReel Available	Min.: 1 Mult.: 1 : 5,000
Surface Mount Fuses 1.5A 110V TIME DELAY SF-1206SA150W-2 Bourns 1: $0.94 114,141In Stock	Mfr. Part No. SF-1206SA150W-2 Mouser Part No 652-SF-1206SA150W-2	Bourns	Surface Mount Fuses 1.5A 110V TIME DELAY Learn More about Bourns aec q200 singlfuse fuses	Datasheet	114,141In Stock	Cut Tape $0.94 $0.866 $0.718 $0.662 Reel $0.436 View $0.595 $0.549 $0.506 $0.401 MouseReel Available	Min.: 1 Mult.: 1 : 3,500
Circuit Breakers 40A TOGGLE ACTUATOR W31-X2M1G-40 TE Connectivity / P&B 1: $57.92 422In Stock	Mfr. Part No. W31-X2M1G-40 Mouser Part No 655-W31-X2M1G-40	TE Connectivity / P&B	Circuit Breakers 40A TOGGLE ACTUATOR	Datasheet	422In Stock	$57.92 $57.00 $51.15 $48.65 View $45.77 $45.76 Quote	Min.: 1 Mult.: 1
NTC (Negative Temperature Coefficient) Thermistors THERMISTOR 311P18-06S7R6 TE Connectivity / Measurement Specialties 1: $578.54 41In Stock	Mfr. Part No. 311P18-06S7R6 Mouser Part No 657-311P18-06S7R6	TE Connectivity / Measurement Specialties	NTC (Negative Temperature Coefficient) Thermistors THERMISTOR	Datasheet	41In Stock	$578.54 $528.92 $487.21 $456.80 View Quote	Min.: 1 Mult.: 1
SCRs 20A If; 1200V Vr TO-247AD 3L VS-30TPS12LHM3 Vishay Semiconductors 1: $5.91 6,621In Stock	Mfr. Part No. VS-30TPS12LHM3 Mouser Part No 78-VS-30TPS12LHM3	Vishay Semiconductors	SCRs 20A If; 1200V Vr TO-247AD 3L Learn More about Vishay Semiconductors vishay aec q101 scr thyristors	Datasheet	6,621In Stock	$5.91 $3.43 $2.97 $2.49	Min.: 1 Mult.: 1
ESD Protection Diodes / TVS Diodes 33V 200W UNI-DIR SZSMF AEC-Q101 SZSMF33AT1G Littelfuse 1: $0.67 178,451In Stock	Mfr. Part No. SZSMF33AT1G Mouser Part No 863-SZSMF33AT1G	Littelfuse	ESD Protection Diodes / TVS Diodes 33V 200W UNI-DIR SZSMF AEC-Q101 Learn More about Littelfuse tvsdiodes	Datasheet	178,451In Stock	Cut Tape $0.67 $0.378 $0.301 $0.243 Reel $0.155 View $0.229 $0.142 $0.141 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
Varistors 750VAC 10% 60mm High E B72260B0751K001 TDK 1: $115.05 357In Stock	Mfr. Part No. B72260B0751K001 Mouser Part No 871-B72260B0751K001	TDK	Varistors 750VAC 10% 60mm High E Learn More about TDK epcosvaristors	Datasheet	357In Stock	$115.05 $97.29	Min.: 1 Mult.: 1
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors TG30-A90XSMD B88069X9991T203 TDK 1: $2.38 12,736In Stock	Mfr. Part No. B88069X9991T203 Mouser Part No 871-B88069X9991T203	TDK	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors TG30-A90XSMD	Datasheet	12,736In Stock	Cut Tape $2.38 $2.20 $1.82 $1.68 Reel $1.12 View $1.51 $1.39 $1.35 $1.09 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
ESD Protection Diodes / TVS Diodes 8-Line TVS Array Low Capacitance RCLAMP0508M.TBT Semtech 1: $4.15 34,156In Stock	Mfr. Part No. RCLAMP0508M.TBT Mouser Part No 947-RCLAMP0508M.TBT	Semtech	ESD Protection Diodes / TVS Diodes 8-Line TVS Array Low Capacitance Learn More about Semtech tvs esd suppressors	Datasheet	34,156In Stock	Cut Tape $4.15 $2.58 $2.11 $1.63 Reel $1.49 View $1.36 $1.33 MouseReel Available	Min.: 1 Mult.: 1 : 500
Industrial Surge Protectors STP T1 75kA 690Y/400V ALM STP690Y07M Mersen 1: $836.22 3In Stock New Product	Mfr. Part No. STP690Y07M Mouser Part No 737-STP690Y07M New Product	Mersen	Industrial Surge Protectors STP T1 75kA 690Y/400V ALM	Datasheet	3In Stock	$836.22 $772.13	Min.: 1 Mult.: 1
Thermal Cut-offs TCO, High Current, SMD, 55C, Self Hold AEC-Q200 SD55ABB Bourns 1: $1.96 2,829In Stock	Mfr. Part No. SD55ABB Mouser Part No 652-SD55ABB	Bourns	Thermal Cut-offs TCO, High Current, SMD, 55C, Self Hold AEC-Q200 Learn More about Bourns ad sd miniature tco devices	Datasheet	2,829In Stock	Cut Tape $1.96 $1.86 $1.76 $1.68 View Reel $1.07 $1.61 $1.35 $1.25 $1.21 $1.07 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
Thermal Cut-offs TCO, High Current, Axial Lead, 55C, Self Hold AEC-Q200 AD55ABB Bourns 1: $1.83 2,467In Stock	Mfr. Part No. AD55ABB Mouser Part No 652-AD55ABB	Bourns	Thermal Cut-offs TCO, High Current, Axial Lead, 55C, Self Hold AEC-Q200 Learn More about Bourns ad sd miniature tco devices	Datasheet	2,467In Stock	$1.83 $1.74 $1.45 $1.38 View $1.32 $1.26 $1.16 $1.13 $1.06	Min.: 1 Mult.: 1
Thermal Cut-offs TCO, High Current, SMD, 82C, non Self Hold AEC-Q200 SD82WBB Bourns 1: $1.91 4,877In Stock	Mfr. Part No. SD82WBB Mouser Part No 652-SD82WBB	Bourns	Thermal Cut-offs TCO, High Current, SMD, 82C, non Self Hold AEC-Q200 Learn More about Bourns ad sd miniature tco devices	Datasheet	4,877In Stock	Cut Tape $1.91 $1.82 $1.72 $1.65 View Reel $1.08 $1.58 $1.35 $1.23 $1.08 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
Thermal Cut-offs TCO, High Current, SMD, 85C, Self Hold AEC-Q200 SD85ABB Bourns 1: $2.84 3,205In Stock	Mfr. Part No. SD85ABB Mouser Part No 652-SD85ABB	Bourns	Thermal Cut-offs TCO, High Current, SMD, 85C, Self Hold AEC-Q200 Learn More about Bourns ad sd miniature tco devices	Datasheet	3,205In Stock	Cut Tape $2.84 $2.46 $1.99 $1.69 View Reel $1.17 $1.64 $1.39 $1.18 $1.17 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
Cartridge Fuses FUSE, CERAMIC TUBE 0.5A, 600VAC/600VDC 0ADAC0500-BE Bel Fuse 1: $3.78 9,876In Stock End of Life	Mfr. Part No. 0ADAC0500-BE Mouser Part No 530-0ADAC0500-BE End of Life	Bel Fuse	Cartridge Fuses FUSE, CERAMIC TUBE 0.5A, 600VAC/600VDC Learn More about Bel Fuse bel 0adac fuses	Datasheet	9,876In Stock	$3.78 $3.13 $2.75 $2.50 View $2.28 $2.13 $1.87 $1.69	Min.: 1 Mult.: 1

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Circuit Protection

Types of Circuit Protection