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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.
Circuit Breakers UL/CSA/IEC SLASH RTD TM MCCB 80A 3P NZMN1-A80-NA Eaton Electrical 1: $2,762.90 2In Stock New Product	Mfr. Part No. NZMN1-A80-NA Mouser Part No 504-NZMN1-A80-NA New Product	Eaton Electrical	Circuit Breakers UL/CSA/IEC SLASH RTD TM MCCB 80A 3P	Datasheet	2In Stock	$2,762.90	Min.: 1 Mult.: 1
NTC (Negative Temperature Coefficient) Thermistors 50K, +/-0.2C: 0C-70C, B4260, uninsulated wire TTS-50KC6-BG CTS Electronic Components 1: $1.90 395In Stock 105Expected 2026/11/12 New Product	Mfr. Part No. TTS-50KC6-BG Mouser Part No 774-TTS50KC6BG New Product	CTS Electronic Components	NTC (Negative Temperature Coefficient) Thermistors 50K, +/-0.2C: 0C-70C, B4260, uninsulated wire Learn More about CTS Electronic Components cts tt s thermistors	Datasheet	395In Stock 105Expected 2026/11/12	$1.90 $1.66 $1.59 $1.47 View $1.24 $1.22	Min.: 1 Mult.: 1
NTC (Negative Temperature Coefficient) Thermistors 1K, +/-0.2C: 0C-70C, B3977,Teflon insulated wire TTS-1KC3-BZ CTS Electronic Components 1: $2.41 500In Stock New Product	Mfr. Part No. TTS-1KC3-BZ Mouser Part No 774-TTS1KC3BZ New Product	CTS Electronic Components	NTC (Negative Temperature Coefficient) Thermistors 1K, +/-0.2C: 0C-70C, B3977,Teflon insulated wire Learn More about CTS Electronic Components cts tt s thermistors	Datasheet	500In Stock	$2.41 $2.08 $1.97 $1.79 View $1.78 $1.50 $1.44 $1.38	Min.: 1 Mult.: 1
NTC (Negative Temperature Coefficient) Thermistors 30K, +/-0.2C: 0C-70C, B4260, uninsulated wire TTS-30KC6-BG CTS Electronic Components 1: $2.24 500In Stock New Product	Mfr. Part No. TTS-30KC6-BG Mouser Part No 774-TTS30KC6BG New Product	CTS Electronic Components	NTC (Negative Temperature Coefficient) Thermistors 30K, +/-0.2C: 0C-70C, B4260, uninsulated wire Learn More about CTS Electronic Components cts tt s thermistors	Datasheet	500In Stock	$2.24 $1.93 $1.84 $1.67 View $1.65 $1.40 $1.34 $1.27	Min.: 1 Mult.: 1
NTC (Negative Temperature Coefficient) Thermistors 30K, +/-0.2C: 0C-70C, B3942, uninsulated wire TTS-30KC5-BG CTS Electronic Components 1: $2.24 500In Stock New Product	Mfr. Part No. TTS-30KC5-BG Mouser Part No 774-TTS30KC5BG New Product	CTS Electronic Components	NTC (Negative Temperature Coefficient) Thermistors 30K, +/-0.2C: 0C-70C, B3942, uninsulated wire Learn More about CTS Electronic Components cts tt s thermistors	Datasheet	500In Stock	$2.24 $1.93 $1.84 $1.67 View $1.65 $1.40 $1.34 $1.27	Min.: 1 Mult.: 1
NTC (Negative Temperature Coefficient) Thermistors 20K, +/-0.2C: 0C-70C, B4260, Teflon insulated wire TTS-20KC6-BZ CTS Electronic Components 1: $2.41 461In Stock New Product	Mfr. Part No. TTS-20KC6-BZ Mouser Part No 774-TTS20KC6BZ New Product	CTS Electronic Components	NTC (Negative Temperature Coefficient) Thermistors 20K, +/-0.2C: 0C-70C, B4260, Teflon insulated wire Learn More about CTS Electronic Components cts tt s thermistors	Datasheet	461In Stock	$2.41 $2.08 $1.97 $1.79 View $1.78 $1.50 $1.44 $1.38	Min.: 1 Mult.: 1
Thermal Cut-offs TCO, High Current, SMD, 90C, Self Hold AEC-Q200 SD90ABB Bourns 1: $1.97 14,922In Stock	Mfr. Part No. SD90ABB Mouser Part No 652-SD90ABB	Bourns	Thermal Cut-offs TCO, High Current, SMD, 90C, Self Hold AEC-Q200 Learn More about Bourns ad sd miniature tco devices	Datasheet	14,922In Stock	Cut Tape $1.97 $1.86 $1.76 $1.67 View Reel $1.15 $1.60 $1.51 $1.35 $1.30 $1.15 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
Circuit Breaker Accessories 3 POLE C-H UL 400A Eaton Electrical ELLBN3400W ELLBN3400W Eaton Electrical 1: $3,233.59 1In Stock New Product	Mfr. Part No. ELLBN3400W Mouser Part No 504-ELLBN3400W New Product	Eaton Electrical	Circuit Breaker Accessories 3 POLE C-H UL 400A		1In Stock	$3,233.59	Min.: 1 Mult.: 1
Circuit Breakers 2P 250AMP HMCP Eaton Electrical HM2P250J5 HM2P250J5 Eaton Electrical 1: $2,390.33 1In Stock New Product	Mfr. Part No. HM2P250J5 Mouser Part No 504-HM2P250J5 New Product	Eaton Electrical	Circuit Breakers 2P 250AMP HMCP	Datasheet	1In Stock	$2,390.33	Min.: 1 Mult.: 1
Circuit Breaker Accessories 250A 3P Thermal Mag Fixed/Adj Trip Unit Eaton Electrical JT3250FA JT3250FA Eaton Electrical 1: $1,803.44 1In Stock New Product	Mfr. Part No. JT3250FA Mouser Part No 504-JT3250FA New Product	Eaton Electrical	Circuit Breaker Accessories 250A 3P Thermal Mag Fixed/Adj Trip Unit		1In Stock	$1,803.44	Min.: 1 Mult.: 1
Circuit Breaker Accessories LATCH CHECK SWITCH Eaton Electrical 699B147G01 699B147G01 Eaton Electrical 1: $1,226.55 5In Stock New Product	Mfr. Part No. 699B147G01 Mouser Part No 504-699B147G01 New Product	Eaton Electrical	Circuit Breaker Accessories LATCH CHECK SWITCH	Datasheet	5In Stock	$1,226.55	Min.: 1 Mult.: 1
Surge Protection Accessories Flange to Bulkhead Type 4.3-10 Adapter Kit BF4310 PolyPhaser 1: $53.17 7In Stock New Product	Mfr. Part No. BF4310 Mouser Part No 44-BF4310 New Product	PolyPhaser	Surge Protection Accessories Flange to Bulkhead Type 4.3-10 Adapter Kit Learn More about PolyPhaser surge protector accessories	Datasheet	7In Stock	$53.17 $49.93 $48.32	Min.: 1 Mult.: 1
Surge Protection Accessories Kit Flange to Bulkhead DIN Adapter BFD PolyPhaser 1: $39.55 24In Stock New Product	Mfr. Part No. BFD Mouser Part No 44-BFD New Product	PolyPhaser	Surge Protection Accessories Kit Flange to Bulkhead DIN Adapter Learn More about PolyPhaser surge protector accessories	Datasheet	24In Stock	$39.55 $36.90 $35.37 $35.36 Quote Quote	Min.: 1 Mult.: 1
Connectorised Surge Protectors Type N F/F Coaxial RF Surge Protector, 800MHz - 2.5GHz, 300W, IP67, 24 V Max., 25uJ, 20kA, Hybrid, Bracket Down, Hole Mount DGXJ+24NFNF-A PolyPhaser 1: $191.13 3In Stock New Product	Mfr. Part No. DGXJ+24NFNF-A Mouser Part No 44-DGXJ+24NFNF-A New Product	PolyPhaser	Connectorised Surge Protectors Type N F/F Coaxial RF Surge Protector, 800MHz - 2.5GHz, 300W, IP67, 24 V Max., 25uJ, 20kA, Hybrid, Bracket Down, Hole Mount Learn More about PolyPhaser gx surge protectors	Datasheet	3In Stock	$191.13 $181.29	Min.: 1 Mult.: 1
Connectorised Surge Protectors Type N F/M Coaxial RF Surge Protector, 800MHz - 2.5GHz, 300W, IP67, 15 V Max., 500uJ, 20kA, Hybrid, Bracket Down, Hole Mount DGXZ+15NFNM-A PolyPhaser 1: $258.73 1In Stock New Product	Mfr. Part No. DGXZ+15NFNM-A Mouser Part No 44-DGXZ+15NFNM-A New Product	PolyPhaser	Connectorised Surge Protectors Type N F/M 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	1In Stock	$258.73 $247.80	Min.: 1 Mult.: 1
Connectorised Surge Protectors 7/16 F/M Bulkhead Coaxial RF Surge Protector, 698MHz - 2.7GHz, 1.5kW, IP67, 30 V Max., 25mJ, 30kA, Filter, Low PIM -155 dBc ESXDC-DFM PolyPhaser 1: $190.89 5In Stock New Product	Mfr. Part No. ESXDC-DFM Mouser Part No 44-ESXDC-DFM New Product	PolyPhaser	Connectorised Surge Protectors 7/16 F/M Bulkhead Coaxial RF Surge Protector, 698MHz - 2.7GHz, 1.5kW, IP67, 30 V Max., 25mJ, 30kA, Filter, Low PIM -155 dBc Learn More about PolyPhaser 650mhz 2 7ghz surge protectors	Datasheet	5In Stock	$190.89 $182.82	Min.: 1 Mult.: 1
Connectorised Surge Protectors TNC F/M Bulkhead Coaxial RF Surge Protector, DC - 7GHz, DC Pass, 90W, IP67, 4mJ, 20kA, Gas Discharge Tube GT-TFM-AL PolyPhaser 1: $98.13 5In Stock New Product	Mfr. Part No. GT-TFM-AL Mouser Part No 44-GT-TFM-AL New Product	PolyPhaser	Connectorised Surge Protectors TNC F/M Bulkhead Coaxial RF Surge Protector, DC - 7GHz, DC Pass, 90W, IP67, 4mJ, 20kA, Gas Discharge Tube Learn More about PolyPhaser dc 7ghz rf coaxial surge protectors	Datasheet	5In Stock	$98.13 $93.07	Min.: 1 Mult.: 1
Connectorised Surge Protectors Outdoor Twisted Pair Lightning Surge Protector, 2 Pair Dual Telco Trunk, UL 497B IX-2T PolyPhaser 1: $183.00 1In Stock New Product	Mfr. Part No. IX-2T Mouser Part No 44-IX-2T New Product	PolyPhaser	Connectorised Surge Protectors Outdoor Twisted Pair Lightning Surge Protector, 2 Pair Dual Telco Trunk, UL 497B	Datasheet	1In Stock	$183.00 $175.26	Min.: 1 Mult.: 1
Connectorised Surge Protectors 7/16 F/F Bulkhead Coaxial RF Surge Protector, 698MHz - 2.7GHz, DC Block, 500W, IP67, .005uJ, 40kA, Filter, Low PIM TSX-DFF PolyPhaser 1: $189.41 4In Stock New Product	Mfr. Part No. TSX-DFF Mouser Part No 44-TSX-DFF New Product	PolyPhaser	Connectorised Surge Protectors 7/16 F/F Bulkhead Coaxial RF Surge Protector, 698MHz - 2.7GHz, DC Block, 500W, IP67, .005uJ, 40kA, Filter, Low PIM Learn More about PolyPhaser 650mhz 2 7ghz surge protectors	Datasheet	4In Stock	$189.41 $179.64	Min.: 1 Mult.: 1
Connectorised Surge Protectors 7/16 F/M Bulkhead Coaxial RF Surge Protector, 698MHz - 2.7GHz, DC Block, 500W, IP67, .005uJ, 40kA, Filter, Low PIM, w/ Bracket TSX-DFM-BF PolyPhaser 1: $195.63 6In Stock New Product	Mfr. Part No. TSX-DFM-BF Mouser Part No 44-TSX-DFM-BF New Product	PolyPhaser	Connectorised Surge Protectors 7/16 F/M Bulkhead Coaxial RF Surge Protector, 698MHz - 2.7GHz, DC Block, 500W, IP67, .005uJ, 40kA, Filter, Low PIM, w/ Bracket Learn More about PolyPhaser 650mhz 2 7ghz surge protectors	Datasheet	6In Stock	$195.63 $187.36	Min.: 1 Mult.: 1
Connectorised Surge Protectors 4.3-10 F/F Bulkhead Coaxial RF Surge Protector, 698MHz - 2.7GHz, 500W, IP67, 80 V Max., 1mJ, 40kA, Filter, Low PIM TSXDC-4310FF PolyPhaser 1: $190.89 4In Stock New Product	Mfr. Part No. TSXDC-4310FF Mouser Part No 44-TSXDC-4310FF New Product	PolyPhaser	Connectorised Surge Protectors 4.3-10 F/F Bulkhead Coaxial RF Surge Protector, 698MHz - 2.7GHz, 500W, IP67, 80 V Max., 1mJ, 40kA, Filter, Low PIM Learn More about PolyPhaser 650mhz 2 7ghz surge protectors	Datasheet	4In Stock	$190.89 $182.82	Min.: 1 Mult.: 1
Circuit Breaker Accessories 508, DM, 20A, Distribution Module, GND - OV PM12-T03-00-GND-20A-E E-T-A 1: $35.80 11In Stock New Product	Mfr. Part No. PM12-T03-00-GND-20A-E Mouser Part No 457-PM12T0300GND2AE New Product	E-T-A	Circuit Breaker Accessories 508, DM, 20A, Distribution Module, GND - OV	Datasheet	11In Stock	$35.80 $27.41 $25.48	Min.: 1 Mult.: 1
Circuit Breakers 508,DM,24VDC,CL,16A,ATX REX22D-TA1-100-DC24V-16A-E E-T-A 1: $105.10 14In Stock New Product	Mfr. Part No. REX22D-TA1-100-DC24V-16A-E Mouser Part No 457-REX22DTA116E New Product	E-T-A	Circuit Breakers 508,DM,24VDC,CL,16A,ATX Learn More about E-T-A eta rex22d t intelligent circuit protectors	Datasheet	14In Stock	$105.10 $89.96 $89.34 $78.39 View $75.77 Quote	Min.: 1 Mult.: 1
Circuit Breakers 508,DM,24VDC,CL,2,3,4..6,8,10,ATX REX22D-TD2-100-DC24V-2/3/4A - 6/8/10A-E E-T-A 1: $127.49 4In Stock New Product	Mfr. Part No. REX22D-TD2-100-DC24V-2/3/4A - 6/8/10A-E Mouser Part No 457-REX22DTD2234681E New Product	E-T-A	Circuit Breakers 508,DM,24VDC,CL,2,3,4..6,8,10,ATX Learn More about E-T-A eta rex22d t intelligent circuit protectors	Datasheet	4In Stock	$127.49 $106.24 $102.34 $92.81 View $89.05 Quote	Min.: 1 Mult.: 1
Circuit Breakers 508,DM,24VDC,CL,2-4-6,ATX REX22D-TD2-100-DC24V-2A/4A/6A-E E-T-A 1: $127.49 13In Stock New Product	Mfr. Part No. REX22D-TD2-100-DC24V-2A/4A/6A-E Mouser Part No 457-REX22DTD22A4A6AE New Product	E-T-A	Circuit Breakers 508,DM,24VDC,CL,2-4-6,ATX Learn More about E-T-A eta rex22d t intelligent circuit protectors	Datasheet	13In Stock	$127.49 $108.37 $92.81 $89.06 View Quote	Min.: 1 Mult.: 1

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Circuit Protection

Types of Circuit Protection