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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 (JPY) Filter the results in the table by unit price based on your quantity.	Qty.
Connectorized Surge Protectors Coaxial RF Surge Protector Kit, 25x GT-NFF-AL GT-NFF-AL25 PolyPhaser 1: ¥146,800.8 4In Stock New Product	Mfr. Part # GT-NFF-AL25 Mouser Part # 44-GT-NFF-AL25 New Product	PolyPhaser	Connectorized Surge Protectors Coaxial RF Surge Protector Kit, 25x GT-NFF-AL	Datasheet	4In Stock	¥146,800.8	Min.: 1 Mult.: 1
Automotive Fuses FUSE - ZCASE MEGA 32V M10 80A 480 PC 3298080.ZXM10 Littelfuse 1: ¥2,322.1 289In Stock New Product	Mfr. Part # 3298080.ZXM10 Mouser Part # 576-3298080.ZXM10 New Product	Littelfuse	Automotive Fuses FUSE - ZCASE MEGA 32V M10 80A 480 PC	Datasheet	289In Stock	¥2,322.1 ¥2,167.6 ¥1,712.5 ¥1,460 View ¥1,337.1 ¥1,290.6 ¥1,288.9 ¥1,275.6 Quote	Min.: 1 Mult.: 1
NTC Thermistors NTC THERMISTOR G1540 / 50k/ 2% B57540G1503G000 TDK 1: ¥848.8 975In Stock New Product	Mfr. Part # B57540G1503G000 Mouser Part # 871-B57540G1503G000 New Product	TDK	NTC Thermistors NTC THERMISTOR G1540 / 50k/ 2% Learn More about TDK thermistors	Datasheet	975In Stock	¥848.8 ¥727.5 ¥636.2 ¥566.4 View ¥538.2 ¥523.2 ¥445.1 ¥431.9	Min.: 1 Mult.: 1
Automotive Fuses FUSE - ZCASE MEGA 32V M10 400A 480 PC 3298400.ZXM10 Littelfuse 1: ¥2,322.1 468In Stock New Product	Mfr. Part # 3298400.ZXM10 Mouser Part # 576-3298400.ZXM10 New Product	Littelfuse	Automotive Fuses FUSE - ZCASE MEGA 32V M10 400A 480 PC	Datasheet	468In Stock	¥2,322.1 ¥2,167.6 ¥1,712.5 ¥1,345.4 View ¥1,205.9 ¥1,114.5 ¥1,049.8 ¥1,021.5	Min.: 1 Mult.: 1
NTC Thermistors 30K, +/-0.2C: 0C-70C, B4260, uninsulated wire TTS-30KC6-BG CTS Electronic Components 1: ¥372.1 500In Stock New Product	Mfr. Part # TTS-30KC6-BG Mouser Part # 774-TTS30KC6BG New Product	CTS Electronic Components	NTC Thermistors 30K, +/-0.2C: 0C-70C, B4260, uninsulated wire Learn More about CTS Electronic Components cts tt s thermistors	Datasheet	500In Stock	¥372.1 ¥320.6 ¥305.6 ¥277.4 View ¥274.1 ¥232.5 ¥222.6 ¥210.9	Min.: 1 Mult.: 1
NTC Thermistors 20K, +/-0.2C: 0C-70C, B4260, Teflon insulated wire TTS-20KC6-BZ CTS Electronic Components 1: ¥400.3 461In Stock New Product	Mfr. Part # TTS-20KC6-BZ Mouser Part # 774-TTS20KC6BZ New Product	CTS Electronic Components	NTC Thermistors 20K, +/-0.2C: 0C-70C, B4260, Teflon insulated wire Learn More about CTS Electronic Components cts tt s thermistors	Datasheet	461In Stock	¥400.3 ¥345.5 ¥327.2 ¥297.3 View ¥295.7 ¥249.2 ¥239.2 ¥229.2	Min.: 1 Mult.: 1
ESD Protection Diodes / TVS Diodes 600W, 18V, Automotive, Bidirectional, TVS SMA6S18CAH Taiwan Semiconductor 1: ¥91.4 9,800In Stock New Product	Mfr. Part # SMA6S18CAH Mouser Part # 821-SMA6S18CAH New Product	Taiwan Semiconductor	ESD Protection Diodes / TVS Diodes 600W, 18V, Automotive, Bidirectional, TVS Learn More about Taiwan Semiconductor taiwan semi sma6fxcah sma6sxcah tvs diodes	Datasheet	9,800In Stock	Cut Tape ¥91.4 ¥40.7 ¥35.7 ¥26.7 Reel ¥16.6 View ¥26.2 ¥24.3 ¥24.1 ¥14.6 MouseReel Available	Min.: 1 Mult.: 1 : 14,000
NTC Thermistors 50K, +/-0.2C: 0C-70C, B4260, uninsulated wire TTS-50KC6-BG CTS Electronic Components 1: ¥315.6 395In Stock 105Expected 11/12/2026 New Product	Mfr. Part # TTS-50KC6-BG Mouser Part # 774-TTS50KC6BG New Product	CTS Electronic Components	NTC Thermistors 50K, +/-0.2C: 0C-70C, B4260, uninsulated wire Learn More about CTS Electronic Components cts tt s thermistors	Datasheet	395In Stock 105Expected 11/12/2026	¥315.6 ¥275.7 ¥264.1 ¥242.5 View ¥206 ¥199.3 ¥191	Min.: 1 Mult.: 1
NTC Thermistors 30K, +/-0.2C: 0C-70C, B3942, uninsulated wire TTS-30KC5-BG CTS Electronic Components 1: ¥372.1 500In Stock New Product	Mfr. Part # TTS-30KC5-BG Mouser Part # 774-TTS30KC5BG New Product	CTS Electronic Components	NTC Thermistors 30K, +/-0.2C: 0C-70C, B3942, uninsulated wire Learn More about CTS Electronic Components cts tt s thermistors	Datasheet	500In Stock	¥372.1 ¥320.6 ¥305.6 ¥277.4 View ¥274.1 ¥232.5 ¥222.6 ¥210.9	Min.: 1 Mult.: 1
NTC Thermistors 1K, +/-0.2C: 0C-70C, B3977,Teflon insulated wire TTS-1KC3-BZ CTS Electronic Components 1: ¥400.3 500In Stock New Product	Mfr. Part # TTS-1KC3-BZ Mouser Part # 774-TTS1KC3BZ New Product	CTS Electronic Components	NTC Thermistors 1K, +/-0.2C: 0C-70C, B3977,Teflon insulated wire Learn More about CTS Electronic Components cts tt s thermistors	Datasheet	500In Stock	¥400.3 ¥345.5 ¥327.2 ¥297.3 View ¥295.7 ¥249.2 ¥239.2 ¥229.2	Min.: 1 Mult.: 1
Circuit Breakers 2P 250AMP HMCP Eaton Electrical HM2P250J5 HM2P250J5 Eaton Electrical 1: ¥396,960.7 1In Stock New Product	Mfr. Part # HM2P250J5 Mouser Part # 504-HM2P250J5 New Product	Eaton Electrical	Circuit Breakers 2P 250AMP HMCP	Datasheet	1In Stock	¥396,960.7	Min.: 1 Mult.: 1
Circuit Breaker Accessories LATCH CHECK SWITCH Eaton Electrical 699B147G01 699B147G01 Eaton Electrical 1: ¥203,691.8 5In Stock New Product	Mfr. Part # 699B147G01 Mouser Part # 504-699B147G01 New Product	Eaton Electrical	Circuit Breaker Accessories LATCH CHECK SWITCH	Datasheet	5In Stock	¥203,691.8	Min.: 1 Mult.: 1
Circuit Breaker Accessories 3 POLE C-H UL 400A Eaton Electrical ELLBN3400W ELLBN3400W Eaton Electrical 1: ¥537,003 1In Stock New Product	Mfr. Part # ELLBN3400W Mouser Part # 504-ELLBN3400W New Product	Eaton Electrical	Circuit Breaker Accessories 3 POLE C-H UL 400A		1In Stock	¥537,003	Min.: 1 Mult.: 1
Circuit Breaker Accessories 250A 3P Thermal Mag Fixed/Adj Trip Unit Eaton Electrical JT3250FA JT3250FA Eaton Electrical 1: ¥299,498.2 1In Stock New Product	Mfr. Part # JT3250FA Mouser Part # 504-JT3250FA New Product	Eaton Electrical	Circuit Breaker Accessories 250A 3P Thermal Mag Fixed/Adj Trip Unit		1In Stock	¥299,498.2	Min.: 1 Mult.: 1
Connectorized Surge Protectors Type N M/F Coaxial RF Surge Protector, 10MHz - 1GHz, DC Block, 1.5kW, 3.5mJ, 20kA, Blocking Cap, Bracket Up, Hole Mount IS-B50LN-C0-MA PolyPhaser 1: ¥18,584.9 5In Stock New Product	Mfr. Part # IS-B50LN-C0-MA Mouser Part # 44-IS-B50LN-C0-MA New Product	PolyPhaser	Connectorized Surge Protectors Type N M/F Coaxial RF Surge Protector, 10MHz - 1GHz, DC Block, 1.5kW, 3.5mJ, 20kA, Blocking Cap, Bracket Up, Hole Mount Learn More about PolyPhaser is b50 surge protectors	Datasheet	5In Stock	¥18,584.9 ¥17,628.2	Min.: 1 Mult.: 1
Connectorized Surge Protectors Outdoor Twisted Pair Lightning Surge Protector, 2 Pair 100Base-T Ethernet, 1 Pair 48Vdc, UL 497B IX-2H1DC48 PolyPhaser 1: ¥30,916.2 5In Stock New Product	Mfr. Part # IX-2H1DC48 Mouser Part # 44-IX-2H1DC48 New Product	PolyPhaser	Connectorized Surge Protectors Outdoor Twisted Pair Lightning Surge Protector, 2 Pair 100Base-T Ethernet, 1 Pair 48Vdc, UL 497B Learn More about PolyPhaser ix surge protectors	Datasheet	5In Stock	¥30,916.2 ¥29,607.3	Min.: 1 Mult.: 1
Connectorized Surge Protectors Type N F/M Bulkhead Coaxial RF Surge Protector, 1.8GHz - 6GHz, DC Block, 10W, IP67, .5uJ, 18kA, Filter LSXL-ME PolyPhaser 1: ¥25,733.9 5In Stock New Product	Mfr. Part # LSXL-ME Mouser Part # 44-LSXL-ME New Product	PolyPhaser	Connectorized Surge Protectors Type N F/M Bulkhead Coaxial RF Surge Protector, 1.8GHz - 6GHz, DC Block, 10W, IP67, .5uJ, 18kA, Filter Learn More about PolyPhaser 1 5mhz 6ghz surge protectors	Datasheet	5In Stock	¥25,733.9 ¥24,408.4	Min.: 1 Mult.: 1
Surge Protection Accessories Transition Clamp with Shims to Connect Copper to Galvanized Tower Legs for 2 1/4 to 3 1/4 inch TK-3 PolyPhaser 1: ¥8,417.9 10In Stock New Product	Mfr. Part # TK-3 Mouser Part # 44-TK-3 New Product	PolyPhaser	Surge Protection Accessories Transition Clamp with Shims to Connect Copper to Galvanized Tower Legs for 2 1/4 to 3 1/4 inch Learn More about PolyPhaser surge protector accessories	Datasheet	10In Stock	¥8,417.9 ¥7,854.9 ¥7,526 ¥7,524.3 Quote Quote	Min.: 1 Mult.: 1
Connectorized Surge Protectors Type N F/M Bulkhead Coaxial RF Surge Protector, 698MHz - 2.7GHz, DC Block, 500W, IP67, .005uJ, 40kA, Filter, w/ Bracket TSX-NFM-BF PolyPhaser 1: ¥27,451.3 6In Stock New Product	Mfr. Part # TSX-NFM-BF Mouser Part # 44-TSX-NFM-BF New Product	PolyPhaser	Connectorized Surge Protectors Type N F/M Bulkhead Coaxial RF Surge Protector, 698MHz - 2.7GHz, DC Block, 500W, IP67, .005uJ, 40kA, Filter, w/ Bracket Learn More about PolyPhaser 650mhz 2 7ghz surge protectors	Datasheet	6In Stock	¥27,451.3 ¥26,037.8	Min.: 1 Mult.: 1
Connectorized Surge Protectors 4.3-10 M/F Coaxial RF Surge Protector, 100MHz - 520MHz, DC Block, 750W, 20kA, Bracket Down VHF50B43-MA-BD PolyPhaser 1: ¥38,776 4In Stock 4Expected 2/19/2027 New Product	Mfr. Part # VHF50B43-MA-BD Mouser Part # 44-VHF50B43-MA-BD New Product	PolyPhaser	Connectorized Surge Protectors 4.3-10 M/F Coaxial RF Surge Protector, 100MHz - 520MHz, DC Block, 750W, 20kA, Bracket Down	Datasheet	4In Stock 4Expected 2/19/2027	¥38,776 ¥37,136.6	Min.: 1 Mult.: 1
Connectorized Surge Protectors 7/16 M/F Coaxial RF Surge Protector, 100MHz - 512MHz, DC Block, 750W, IP67, .5uJ, 20kA, Filter, Low PIM -150 dBc, Bracket Down, Hole Mount VHF50D-MA-PGR PolyPhaser 1: ¥36,419.1 4In Stock 4Expected 11/13/2026 New Product	Mfr. Part # VHF50D-MA-PGR Mouser Part # 44-VHF50D-MA-PGR New Product	PolyPhaser	Connectorized Surge Protectors 7/16 M/F Coaxial RF Surge Protector, 100MHz - 512MHz, DC Block, 750W, IP67, .5uJ, 20kA, Filter, Low PIM -150 dBc, Bracket Down, Hole Mount Learn More about PolyPhaser 100mhz 512mhz surge protectors	Datasheet	4In Stock 4Expected 11/13/2026	¥36,419.1 ¥34,877.7	Min.: 1 Mult.: 1
Circuit Breakers 508,DM,24VDC,CL,10-12-15,ATX REX22D-TD1-100-DC24V-10A/12A/15A-E E-T-A 1: ¥15,304.5 19In Stock New Product	Mfr. Part # REX22D-TD1-100-DC24V-10A/12A/15A-E Mouser Part # 457-REX22DTD1101215E New Product	E-T-A	Circuit Breakers 508,DM,24VDC,CL,10-12-15,ATX Learn More about E-T-A eta rex22d t intelligent circuit protectors	Datasheet	19In Stock	¥15,304.5 ¥12,645.2 ¥12,462.5 ¥11,753.2	Min.: 1 Mult.: 1
Circuit Breakers 508,DM,24VDC,CL,12-16-20,ATX REX22D-TD1-100-DC24V-12A/16A/20A-E E-T-A 1: ¥18,697.9 5In Stock New Product	Mfr. Part # REX22D-TD1-100-DC24V-12A/16A/20A-E Mouser Part # 457-REX22DTD1121620E New Product	E-T-A	Circuit Breakers 508,DM,24VDC,CL,12-16-20,ATX Learn More about E-T-A eta rex22d t intelligent circuit protectors	Datasheet	5In Stock	¥18,697.9 ¥15,784.5 ¥12,645.2 ¥12,543.9 View ¥12,083.8 Quote	Min.: 1 Mult.: 1
Circuit Breakers 1PH/BR LC 70A MLO 2/4 Cir Al Bus N3R BR24L70RP Eaton Electrical 1: ¥61,271 1In Stock New Product	Mfr. Part # BR24L70RP Mouser Part # 504-BR24L70RP New Product	Eaton Electrical	Circuit Breakers 1PH/BR LC 70A MLO 2/4 Cir Al Bus N3R	Datasheet	1In Stock	¥61,271 ¥42,804 ¥39,950.4 ¥36,721.4 View Quote	Min.: 1 Mult.: 1
Circuit Breaker Accessories PD AUX&ALM SW 1NO/1NC PIGTAIL-30 INCHES PDGXAC Eaton Electrical 1: ¥37,229.7 4In Stock 7Expected 11/10/2026 New Product	Mfr. Part # PDGXAC Mouser Part # 504-PDGXAC New Product	Eaton Electrical	Circuit Breaker Accessories PD AUX&ALM SW 1NO/1NC PIGTAIL-30 INCHES	Datasheet	4In Stock 7Expected 11/10/2026	¥37,229.7 ¥30,856.4 ¥28,444.6 ¥23,499.8	Min.: 1 Mult.: 1

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Circuit Protection

Types of Circuit Protection