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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.
Industrial Surge Protectors AC Surge Protector SPD MCP Panel 120/208 Vac 3-Phase Wye SASD, MOV 100 kA 1101-738 Transtector 1: ¥383,224.3 1In Stock 1Expected 11/6/2026 New At Mouser	Mfr. Part # 1101-738 Mouser Part # 21-1101-738 New At Mouser	Transtector	Industrial Surge Protectors AC Surge Protector SPD MCP Panel 120/208 Vac 3-Phase Wye SASD, MOV 100 kA	Datasheet	1In Stock 1Expected 11/6/2026	¥383,224.3	Min.: 1 Mult.: 1
Connectorized Surge Protectors COAXIAL SURGE PROTECTOR DEVICE, GDT technology up to 2.5 GHz, with SEMPER GDT 90 V 3402.26.0006-EX HUBER+SUHNER 1: ¥59,007 11In Stock	Mfr. Part # 3402.26.0006-EX Mouser Part # 455-3402260006EX	HUBER+SUHNER	Connectorized Surge Protectors COAXIAL SURGE PROTECTOR DEVICE, GDT technology up to 2.5 GHz, with SEMPER GDT 90 V Learn More about HUBER+SUHNER huber suhner surge suppression solutions	Datasheet	11In Stock	¥59,007 ¥53,583.9 ¥52,904.5 View Quote	Min.: 1 Mult.: 1
Circuit Breakers The 3120-N thermal circuit breaker/switch combination unites overcurrent protection and the function of an ON/OFF switch within a single component. The trip element is a thermal bimetal. Type 3120-N is ideally suited for overload prot 3120-N321-H7M1-W01F-16A E-T-A 1: ¥10,241.7 83In Stock	Mfr. Part # 3120-N321-H7M1-W01F-16A Mouser Part # 457-321H7M1W01F16A	E-T-A	Circuit Breakers The 3120-N thermal circuit breaker/switch combination unites overcurrent protection and the function of an ON/OFF switch within a single component. The trip element is a thermal bimetal. Type 3120-N is ideally suited for overload prot Learn More about E-T-A e t a 3120 n thermal circuit breakers	Datasheet	83In Stock	¥10,241.7 ¥8,731.9 ¥8,074.1 ¥7,089.1 View ¥6,061 ¥5,702.2 Quote	Min.: 1 Mult.: 1
NTC Thermistors K 164/470 K/J52 5% NTC Thermistor B57164K0474J052 TDK 1: ¥129.6 5,847In Stock	Mfr. Part # B57164K0474J052 Mouser Part # 871-B57164K0474J052	TDK	NTC Thermistors K 164/470 K/J52 5% NTC Thermistor Learn More about TDK epcos temperature sensor systems	Datasheet	5,847In Stock	Cut Tape ¥129.6 ¥122.2 ¥103.3 ¥97.2 View Reel ¥71.1 ¥94.7 ¥82.9 ¥71.1	Min.: 1 Mult.: 1 : 1,500
Circuit Breakers Cir Brkr,HydMag LELBXB1-1REC4-70014-40 AIRPAX 1: ¥16,988.7 18In Stock	Mfr. Part # LELBXB1-1REC4-70014-40 Mouser Part # 874-BXB11REC47001440	AIRPAX	Circuit Breakers Cir Brkr,HydMag	Datasheet	18In Stock	¥16,988.7 ¥14,831.1 ¥10,311.5 ¥9,060.8 View ¥7,502.7 ¥6,876.5 Quote	Min.: 1 Mult.: 1
Circuit Breakers Circuit breaker screw-type 84 A 3RV20414RA10 Siemens 1: ¥181,520.7 3In Stock	Mfr. Part # 3RV20414RA10 Mouser Part # 982-3RV20414RA10	Siemens	Circuit Breakers Circuit breaker screw-type 84 A Learn More about Siemens 3rv2 circuit breakers	Datasheet	3In Stock	¥181,520.7	Min.: 1 Mult.: 1
Circuit Breakers BRKR 3VA52 3P 250A 35KA FTFM 3VA52255ED310AA0 Siemens 1: ¥405,445.1 1In Stock	Mfr. Part # 3VA52255ED310AA0 Mouser Part # 982-3VA52255ED310AA0	Siemens	Circuit Breakers BRKR 3VA52 3P 250A 35KA FTFM Learn More about Siemens 3va molded case circuit breakers	Datasheet	1In Stock	¥405,445.1	Min.: 1 Mult.: 1
Industrial Surge Protectors SPD T1 EMA 100KA 480V 3P3W EMA51 Square D 1: ¥955,136.5 1In Stock New At Mouser	Mfr. Part # EMA51 Mouser Part # 996-EMA51 New At Mouser	Square D	Industrial Surge Protectors SPD T1 EMA 100KA 480V 3P3W	Datasheet	1In Stock	¥955,136.5	Min.: 1 Mult.: 1
ESD Protection Diodes / TVS Diodes 400W,15V 5%,UNIDIR,SMA TVS SMAJ15AHM3_A/H Vishay Semiconductors 1: ¥136.2 8,815In Stock	Mfr. Part # SMAJ15AHM3_A/H Mouser Part # 78-SMAJ15AHM3_A/H	Vishay Semiconductors	ESD Protection Diodes / TVS Diodes 400W,15V 5%,UNIDIR,SMA TVS	Datasheet	8,815In Stock	Cut Tape ¥136.2 ¥60.8 ¥53.5 ¥40.5 Reel ¥29.7 View ¥33.2 ¥25.6 ¥21.3	Min.: 1 Mult.: 1 : 1,800
ESD Protection Diodes / TVS Diodes 1.5KW,18V 5%,UNIDIR,SMC TVS SMCJ18AHM3_A/H Vishay Semiconductors 1: ¥227.6 2,392In Stock	Mfr. Part # SMCJ18AHM3_A/H Mouser Part # 78-SMCJ18AHM3_A/H	Vishay Semiconductors	ESD Protection Diodes / TVS Diodes 1.5KW,18V 5%,UNIDIR,SMC TVS	Datasheet	2,392In Stock	Cut Tape ¥227.6 ¥143 ¥93.7 ¥72.4 Reel ¥61.1 View ¥58.3 ¥55	Min.: 1 Mult.: 1 : 850
NTC Thermistors NCU15XW152E60RC Murata Electronics 1: ¥21.6 9,605In Stock	Mfr. Part # NCU15XW152E60RC Mouser Part # 81-NCU15XW152E60RC	Murata Electronics	NTC Thermistors Learn More about Murata Electronics murata ncu ntc thermistors	Datasheet	9,605In Stock	Cut Tape ¥21.6 ¥18.6 ¥16.4 ¥13.5 Reel ¥9.5 View ¥11.8 ¥11.3 ¥10.1 ¥8.8 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
ESD Protection Diodes / TVS Diodes AK6 - CA 270V AK6-270C-Y-12 Littelfuse 1: ¥12,266.5 8In Stock	Mfr. Part # AK6-270C-Y-12 Mouser Part # 576-AK6-270C-Y-12	Littelfuse	ESD Protection Diodes / TVS Diodes AK6 - CA 270V	Datasheet	8In Stock	¥12,266.5 ¥9,635.5 ¥9,625.5	Min.: 1 Mult.: 1
ESD Protection Diodes / TVS Diodes 600W,440V 5%,UNIDIR,SMB TVS Vishay Semiconductors P6SMB440AHM3_D/I P6SMB440AHM3_D/I Vishay Semiconductors 1: ¥227.6 2,793In Stock	Mfr. Part # P6SMB440AHM3_D/I Mouser Part # 78-P6SMB440AHM3DI	Vishay Semiconductors	ESD Protection Diodes / TVS Diodes 600W,440V 5%,UNIDIR,SMB TVS Learn More about Vishay Semiconductors vishay semi esmp package evolution	Datasheet	2,793In Stock	Cut Tape ¥227.6 ¥142.3 ¥93.2 ¥72.1 View Reel ¥54.6 ¥61.1 ¥58.1 ¥54.6	Min.: 1 Mult.: 1 : 3,200
ESD Protection Diodes / TVS Diodes 600W,36V 5%,BIDIR,SMB TVS SMBJ36CAHM3_B/I Vishay Semiconductors 1: ¥204.3 1,101In Stock	Mfr. Part # SMBJ36CAHM3_B/I Mouser Part # 78-SMBJ36CAHM3BI	Vishay Semiconductors	ESD Protection Diodes / TVS Diodes 600W,36V 5%,BIDIR,SMB TVS Learn More about Vishay Semiconductors vishay semi esmp package evolution	Datasheet	1,101In Stock	Cut Tape ¥204.3 ¥127.2 ¥83.5 ¥61.3 Reel ¥51.3 View ¥55.8 ¥42.4	Min.: 1 Mult.: 1 : 3,200
SCRs NEW INPUT THYRISTOR - SUPER-248 Vishay Semiconductors VS-70TPS16-M3 VS-70TPS16-M3 Vishay Semiconductors 1: ¥2,577.9 37In Stock 1,500Expected 3/19/2027	Mfr. Part # VS-70TPS16-M3 Mouser Part # 78-VS-70TPS16-M3	Vishay Semiconductors	SCRs NEW INPUT THYRISTOR - SUPER-248	Datasheet	37In Stock 1,500Expected 3/19/2027	¥2,577.9 ¥1,963.3 ¥1,634.4 ¥1,456.7 ¥1,380.3	Min.: 1 Mult.: 1
ESD Protection Diodes / TVS Diodes 1-LINE 1.2V 0.2PF 2.5A SLP0603P2X3J RCLAMP01231ZCFT Semtech 1: ¥109.6 6,554In Stock	Mfr. Part # RCLAMP01231ZCFT Mouser Part # 947-RCLAMP01231ZCFT	Semtech	ESD Protection Diodes / TVS Diodes 1-LINE 1.2V 0.2PF 2.5A SLP0603P2X3J		6,554In Stock	Cut Tape ¥109.6 ¥69.3 ¥44.2 ¥33.1 View Reel ¥18.1 ¥26.7 ¥23.1 ¥22.8 ¥19.4 ¥18.1 MouseReel Available	Min.: 1 Mult.: 1 : 15,000
Fuse Holder Accessories Cover, 1 Position BMZS 901-731 Littelfuse 1: ¥1,842 56In Stock	Mfr. Part # 901-731 Mouser Part # 576-901-731	Littelfuse	Fuse Holder Accessories Cover, 1 Position BMZS	Datasheet	56In Stock	¥1,842 ¥1,835.4 ¥1,081.3 ¥1,029.8	Min.: 1 Mult.: 1
NTC Thermistors RB103J9W-2 THERMISTOR NSRB103J3V2HET001 Littelfuse 1: ¥139.5 3,663In Stock	Mfr. Part # NSRB103J3V2HET001 Mouser Part # 576-SRB103J3V2HET001	Littelfuse	NTC Thermistors RB103J9W-2 THERMISTOR	Datasheet	3,663In Stock	¥139.5 ¥107 ¥92 ¥88.9 View ¥75.7 ¥65.8 ¥60.6 ¥53.5	Min.: 1 Mult.: 1
ESD Protection Diodes / TVS Diodes 300W,550V MIN,UNIDIR,SMA TVS SMAJ550HM3_B/H Vishay Semiconductors 1: ¥176.1 5,387In Stock	Mfr. Part # SMAJ550HM3_B/H Mouser Part # 78-SMAJ550HM3_B/H	Vishay Semiconductors	ESD Protection Diodes / TVS Diodes 300W,550V MIN,UNIDIR,SMA TVS	Datasheet	5,387In Stock	Cut Tape ¥176.1 ¥110.1 ¥71.9 ¥54.1 Reel ¥45 View ¥49.3 ¥43.9 ¥34.7 ¥34.4	Min.: 1 Mult.: 1 : 1,800
ESD Protection Diodes / TVS Diodes 600W,12V 5%,UNIDIR,SMB TVS SMBJ12AHE3_B/I Vishay Semiconductors 1: ¥151.2 3,095In Stock	Mfr. Part # SMBJ12AHE3_B/I Mouser Part # 78-SMBJ12AHE3BI	Vishay Semiconductors	ESD Protection Diodes / TVS Diodes 600W,12V 5%,UNIDIR,SMB TVS Learn More about Vishay Semiconductors vishay semi esmp package evolution	Datasheet	3,095In Stock	Cut Tape ¥151.2 ¥94.2 ¥61.5 ¥46.3 Reel ¥38.7 View ¥42.2 ¥29.7	Min.: 1 Mult.: 1 : 3,200
ESD Protection Diodes / TVS Diodes 600W,60V 5%,UNIDIR,SMB TVS SMBJ60AHE3_B/I Vishay Semiconductors 1: ¥151.2 2,763In Stock	Mfr. Part # SMBJ60AHE3_B/I Mouser Part # 78-SMBJ60AHE3BI	Vishay Semiconductors	ESD Protection Diodes / TVS Diodes 600W,60V 5%,UNIDIR,SMB TVS Learn More about Vishay Semiconductors vishay semi esmp package evolution	Datasheet	2,763In Stock	Cut Tape ¥151.2 ¥94.2 ¥61.5 ¥46.3 Reel ¥38.7 View ¥42.2 ¥29.7	Min.: 1 Mult.: 1 : 3,200
ESD Protection Diodes / TVS Diodes ESD 3.3V VCUT03G1-SD0-G4-08 Vishay Semiconductors 1: ¥56.5 25,870In Stock	Mfr. Part # VCUT03G1-SD0-G4-08 Mouser Part # 78-VCUT03G1SD0G408	Vishay Semiconductors	ESD Protection Diodes / TVS Diodes ESD 3.3V	Datasheet	25,870In Stock	Cut Tape ¥56.5 ¥39.4 ¥19.3 ¥16.1 View Reel ¥7.3 ¥11.1 ¥9.8 ¥9.3 ¥8.1 ¥7.3	Min.: 1 Mult.: 1 : 15,000
Industrial Surge Protectors DC Surge Protector SPD I2R Indoor DIN-Rail 48 Vdc, Single-Mode SASD 1101-626 Transtector 1: ¥59,462.1 25In Stock New At Mouser	Mfr. Part # 1101-626 Mouser Part # 21-1101-626 New At Mouser	Transtector	Industrial Surge Protectors DC Surge Protector SPD I2R Indoor DIN-Rail 48 Vdc, Single-Mode SASD Learn More about Transtector i2r indoor din rail dc spds	Datasheet	25In Stock	¥59,462.1	Min.: 1 Mult.: 1
Connectorized Surge Protectors COAXIAL SURGE PROTECTOR DEVICE, GDT technology up to 2.5 GHz 3402.17.K HUBER+SUHNER 1: ¥84,568.2 29In Stock	Mfr. Part # 3402.17.K Mouser Part # 455-340217K	HUBER+SUHNER	Connectorized Surge Protectors COAXIAL SURGE PROTECTOR DEVICE, GDT technology up to 2.5 GHz Learn More about HUBER+SUHNER huber suhner surge suppression solutions	Datasheet	29In Stock	¥84,568.2 ¥60,646.4 View Quote	Min.: 1 Mult.: 1
NTC Thermistors 10K 5% UL Recognized Standard Lug Sensor NTCALUGE2C90169 Vishay / BC Components 1: ¥410.3 4,319In Stock	Mfr. Part # NTCALUGE2C90169 Mouser Part # 594-2381-645-90169	Vishay / BC Components	NTC Thermistors 10K 5% UL Recognized Standard Lug Sensor Learn More about Vishay / BC Components vishayntcalug	Datasheet	4,319In Stock	¥410.3 ¥335.5 ¥272.4 ¥252.5 View ¥240.8 ¥239.2 ¥210.9 ¥202.6 ¥187.7	Min.: 1 Mult.: 1

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Circuit Protection

Types of Circuit Protection