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Circuit Protection

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (HKD) Filter the results in the table by unit price based on your quantity.	Qty.
ESD Protection Diodes / TVS Diodes Low Clamping TVS ESD Low Cap Uni Single ESDZL5-1F4 STMicroelectronics 1: HK$1.07 339,857In Stock	Mfr. Part No. ESDZL5-1F4 Mouser Part No 511-ESDZL5-1F4	STMicroelectronics	ESD Protection Diodes / TVS Diodes Low Clamping TVS ESD Low Cap Uni Single Learn More about STMicroelectronics stm esdz tvs diodes	Datasheet	339,857In Stock	Cut Tape HK$1.07 HK$0.518 HK$0.411 HK$0.329 View Reel HK$0.14 HK$0.247 HK$0.222 HK$0.206 HK$0.156 HK$0.14 MouseReel Available	Min.: 1 Mult.: 1 : 15,000
ESD Protection Diodes / TVS Diodes Ultra Low clamping single line bidirectional ESD protection ESDZV5H-1BU2 STMicroelectronics 1: HK$1.64 137,371In Stock 105,000Expected 29/10/2026	Mfr. Part No. ESDZV5H-1BU2 Mouser Part No 511-ESDZV5H-1BU2	STMicroelectronics	ESD Protection Diodes / TVS Diodes Ultra Low clamping single line bidirectional ESD protection	Datasheet	137,371In Stock 105,000Expected 29/10/2026	Cut Tape HK$1.64 HK$0.732 HK$0.575 HK$0.469 View Reel HK$0.222 HK$0.403 HK$0.353 HK$0.329 HK$0.247 HK$0.222 MouseReel Available	Min.: 1 Mult.: 1 : 15,000
ESD Protection Diodes / TVS Diodes Ultra-low clamping single line bidirectional ESD protection ESDZV5HS-1BF4 STMicroelectronics 1: HK$1.07 459,415In Stock	Mfr. Part No. ESDZV5HS-1BF4 Mouser Part No 511-ESDZV5HS-1BF4	STMicroelectronics	ESD Protection Diodes / TVS Diodes Ultra-low clamping single line bidirectional ESD protection Learn More about STMicroelectronics stm esdzv5 1bf4 tvs diode	Datasheet	459,415In Stock	Cut Tape HK$1.07 HK$0.518 HK$0.353 HK$0.296 View Reel HK$0.14 HK$0.247 HK$0.222 HK$0.206 HK$0.156 HK$0.14	Min.: 1 Mult.: 1 : 15,000
LED Protection Devices LED Bypass 100nA 1A 15kV 8kV BI LBP01-0810B STMicroelectronics 1: HK$9.45 7,123In Stock	Mfr. Part No. LBP01-0810B Mouser Part No 511-LBP01-0810B	STMicroelectronics	LED Protection Devices LED Bypass 100nA 1A 15kV 8kV BI Learn More about STMicroelectronics stmicro lbp01	Datasheet	7,123In Stock	Cut Tape HK$9.45 HK$5.88 HK$3.83 HK$2.94 Reel HK$2.29 View HK$2.66 HK$2.12 HK$2.00 HK$1.92 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
ESD Protection Diodes / TVS Diodes Automotive 27 V TVS for load dump in D2PAK LDP01-30AY STMicroelectronics 1: HK$34.85 7,787In Stock	Mfr. Part No. LDP01-30AY Mouser Part No 511-LDP01-30AY	STMicroelectronics	ESD Protection Diodes / TVS Diodes Automotive 27 V TVS for load dump in D2PAK	Datasheet	7,787In Stock	Cut Tape HK$34.85 HK$22.93 HK$17.76 HK$16.03 Reel HK$12.17 View HK$13.32 HK$11.51 HK$11.43 Quote MouseReel Available	Min.: 1 Mult.: 1 : 1,000
ESD Protection Diodes / TVS Diodes Automotive 30 V TVS for load dump in D2PAK LDP01-35AY STMicroelectronics 1: HK$31.81 4,236In Stock 6,000Expected 28/11/2026	Mfr. Part No. LDP01-35AY Mouser Part No 511-LDP01-35AY	STMicroelectronics	ESD Protection Diodes / TVS Diodes Automotive 30 V TVS for load dump in D2PAK	Datasheet	4,236In Stock 6,000Expected 28/11/2026	Cut Tape HK$31.81 HK$21.45 HK$17.51 HK$15.45 Reel HK$11.67 View HK$13.32 HK$11.01 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
ESD Protection Diodes / TVS Diodes Automotive 33 V TVS for load dump in D2PAK LDP01-39AY STMicroelectronics 1: HK$34.94 1,580In Stock 2,000Expected 17/11/2026	Mfr. Part No. LDP01-39AY Mouser Part No 511-LDP01-39AY	STMicroelectronics	ESD Protection Diodes / TVS Diodes Automotive 33 V TVS for load dump in D2PAK	Datasheet	1,580In Stock 2,000Expected 17/11/2026	Cut Tape HK$34.94 HK$21.21 HK$17.18 HK$15.21 Reel HK$11.84 View HK$13.32 HK$11.18 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
ESD Protection Diodes / TVS Diodes Automotive 48 V TVS for load dump in D2PAK LDP01-56AY STMicroelectronics 1: HK$33.13 975In Stock	Mfr. Part No. LDP01-56AY Mouser Part No 511-LDP01-56AY	STMicroelectronics	ESD Protection Diodes / TVS Diodes Automotive 48 V TVS for load dump in D2PAK	Datasheet	975In Stock	Cut Tape HK$33.13 HK$22.44 HK$18.25 HK$16.11 Reel HK$12.49 View HK$13.97 HK$11.51 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
ESD Protection Diodes / TVS Diodes Automotive 58 V TVS for load dump in D2PAK LDP01-68AY STMicroelectronics 1: HK$36.09 1,528In Stock 2,000On Order	Mfr. Part No. LDP01-68AY Mouser Part No 511-LDP01-68AY	STMicroelectronics	ESD Protection Diodes / TVS Diodes Automotive 58 V TVS for load dump in D2PAK	Datasheet	1,528In Stock 2,000On Order	Cut Tape HK$36.09 HK$23.76 HK$18.50 HK$16.77 Reel HK$12.49 View HK$13.97 HK$11.51 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
ESD Protection Diodes / TVS Diodes LTNG PRO LNB PW SUPP LNBTVS4-304S STMicroelectronics 1: HK$24.82 1,677In Stock 2,500Expected 5/11/2026	Mfr. Part No. LNBTVS4-304S Mouser Part No 511-LNBTVS4-304S	STMicroelectronics	ESD Protection Diodes / TVS Diodes LTNG PRO LNB PW SUPP Learn More about STMicroelectronics stm standard products	Datasheet	1,677In Stock 2,500Expected 5/11/2026	Cut Tape HK$24.82 HK$16.11 HK$12.33 HK$11.10 Reel HK$7.48 View HK$8.96 HK$8.47 HK$6.83 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
ESD Protection Diodes / TVS Diodes LTNG PRO LNB PW SUPP LNBTVS6-304S STMicroelectronics 1: HK$26.96 4,879In Stock	Mfr. Part No. LNBTVS6-304S Mouser Part No 511-LNBTVS6-304S	STMicroelectronics	ESD Protection Diodes / TVS Diodes LTNG PRO LNB PW SUPP Learn More about STMicroelectronics stm standard products	Datasheet	4,879In Stock	Cut Tape HK$26.96 HK$17.51 HK$13.48 HK$12.17 Reel HK$8.30 View HK$9.86 HK$9.21 HK$7.65 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
SCRs 0.25 Amp 200 Volt P0102BL 5AA4 STMicroelectronics 1: HK$6.17 55,977In Stock	Mfr. Part No. P0102BL 5AA4 Mouser Part No 511-P0102BL	STMicroelectronics	SCRs 0.25 Amp 200 Volt Learn More about STMicroelectronics stm standard products	Datasheet	55,977In Stock	Cut Tape HK$6.17 HK$3.81 HK$2.44 HK$2.23 Reel HK$1.60 View HK$1.99 HK$1.46 HK$1.27 HK$1.09 MouseReel Available	Min.: 1 Mult.: 1 : 3,000
SCRs 0.8 Amp 400 Volt P0102DN 5AA4 STMicroelectronics 1: HK$4.69 28,345In Stock 42,000Expected 16/11/2026	Mfr. Part No. P0102DN 5AA4 Mouser Part No 511-P0102DN	STMicroelectronics	SCRs 0.8 Amp 400 Volt Learn More about STMicroelectronics stm standard products	Datasheet	28,345In Stock 42,000Expected 16/11/2026	Cut Tape HK$4.69 HK$2.91 HK$1.86 HK$1.40 Reel HK$1.24 View HK$1.05 HK$0.937 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
ESD Protection Diodes / TVS Diodes Batt & Overvolt Prot RBO40-40G STMicroelectronics 1: HK$39.95 3,045In Stock	Mfr. Part No. RBO40-40G Mouser Part No 511-RBO40-40G	STMicroelectronics	ESD Protection Diodes / TVS Diodes Batt & Overvolt Prot	Datasheet	3,045In Stock	HK$39.95 HK$26.39 HK$20.63 HK$18.74 View HK$15.37 HK$14.96	Min.: 1 Mult.: 1
ESD Protection Diodes / TVS Diodes Reversed Battery OverVolt Prot RBO40-40G-TR STMicroelectronics 1: HK$38.88 3,383In Stock	Mfr. Part No. RBO40-40G-TR Mouser Part No 511-RBO40-40G-TR	STMicroelectronics	ESD Protection Diodes / TVS Diodes Reversed Battery OverVolt Prot	Datasheet	3,383In Stock	Cut Tape HK$38.88 HK$25.73 HK$20.06 HK$18.17 Reel HK$13.89 View HK$15.45 HK$12.58 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
ESD Protection Diodes / TVS Diodes 1500W 10V Bidirect SM15T10CA STMicroelectronics 1: HK$12.91 3,538In Stock	Mfr. Part No. SM15T10CA Mouser Part No 511-SM15T10CA	STMicroelectronics	ESD Protection Diodes / TVS Diodes 1500W 10V Bidirect Learn More about STMicroelectronics stm standard products	Datasheet	3,538In Stock	Cut Tape HK$12.91 HK$8.12 HK$6.07 HK$5.40 Reel HK$3.79 View HK$4.23 HK$3.52 HK$3.31 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
ESD Protection Diodes / TVS Diodes 1500 W 10kW Transil 5.8V tp 70V BI SM15T12CAY STMicroelectronics 1: HK$15.54 3,309In Stock	Mfr. Part No. SM15T12CAY Mouser Part No 511-SM15T12CAY	STMicroelectronics	ESD Protection Diodes / TVS Diodes 1500 W 10kW Transil 5.8V tp 70V BI Learn More about STMicroelectronics stmicro sm15ty transil	Datasheet	3,309In Stock	Cut Tape HK$15.54 HK$9.95 HK$7.42 HK$6.63 Reel HK$4.41 View HK$5.24 HK$4.89 HK$3.84 HK$3.83 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
ESD Protection Diodes / TVS Diodes 1500W 15V Bidirect SM15T15CA STMicroelectronics 1: HK$14.30 4,813In Stock 7,500Expected 25/1/2027	Mfr. Part No. SM15T15CA Mouser Part No 511-SM15T15CA	STMicroelectronics	ESD Protection Diodes / TVS Diodes 1500W 15V Bidirect Learn More about STMicroelectronics stm standard products	Datasheet	4,813In Stock 7,500Expected 25/1/2027	Cut Tape HK$14.30 HK$9.04 HK$6.77 HK$6.03 Reel HK$3.88 View HK$4.74 HK$4.38 HK$3.46 HK$3.39 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
ESD Protection Diodes / TVS Diodes 1500 W 10kW Transil 5.8V to 70V Uni SM15T18AY STMicroelectronics 1: HK$14.96 3,620In Stock	Mfr. Part No. SM15T18AY Mouser Part No 511-SM15T18AY	STMicroelectronics	ESD Protection Diodes / TVS Diodes 1500 W 10kW Transil 5.8V to 70V Uni Learn More about STMicroelectronics stmicro sm15ty transil	Datasheet	3,620In Stock	Cut Tape HK$14.96 HK$9.54 HK$7.12 HK$6.35 Reel HK$4.10 View HK$5.01 HK$4.65 HK$3.66 HK$3.63 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
ESD Protection Diodes / TVS Diodes 1500W 200V Bidirect SM15T200CA STMicroelectronics 1: HK$14.55 3,234In Stock	Mfr. Part No. SM15T200CA Mouser Part No 511-SM15T200CA	STMicroelectronics	ESD Protection Diodes / TVS Diodes 1500W 200V Bidirect Learn More about STMicroelectronics stm standard products	Datasheet	3,234In Stock	Cut Tape HK$14.55 HK$9.29 HK$6.92 HK$6.17 Reel HK$3.94 View HK$4.86 HK$4.50 HK$3.54 HK$3.49 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
ESD Protection Diodes / TVS Diodes 1500W 220V Bidirect SM15T220CA STMicroelectronics 1: HK$14.55 3,187In Stock	Mfr. Part No. SM15T220CA Mouser Part No 511-SM15T220CA	STMicroelectronics	ESD Protection Diodes / TVS Diodes 1500W 220V Bidirect Learn More about STMicroelectronics stm standard products	Datasheet	3,187In Stock	Cut Tape HK$14.55 HK$9.29 HK$6.92 HK$6.17 Reel HK$3.85 View HK$4.86 HK$4.50 HK$3.52 HK$3.49 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
ESD Protection Diodes / TVS Diodes 1500W 22V Unidirect SM15T22A STMicroelectronics 1: HK$13.48 6,636In Stock	Mfr. Part No. SM15T22A Mouser Part No 511-SM15T22A	STMicroelectronics	ESD Protection Diodes / TVS Diodes 1500W 22V Unidirect Learn More about STMicroelectronics stm standard products	Datasheet	6,636In Stock	Cut Tape HK$13.48 HK$8.55 HK$6.38 HK$5.68 Reel HK$3.86 View HK$4.46 HK$4.23 HK$3.51 HK$3.23 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
ESD Protection Diodes / TVS Diodes 1500 W 10kW Transil 5.8V to 70V Uni SM15T27AY STMicroelectronics 1: HK$14.96 4,556In Stock	Mfr. Part No. SM15T27AY Mouser Part No 511-SM15T27AY	STMicroelectronics	ESD Protection Diodes / TVS Diodes 1500 W 10kW Transil 5.8V to 70V Uni Learn More about STMicroelectronics stmicro sm15ty transil	Datasheet	4,556In Stock	Cut Tape HK$14.96 HK$9.54 HK$7.12 HK$6.35 Reel HK$4.18 View HK$5.01 HK$4.59 HK$3.66 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
ESD Protection Diodes / TVS Diodes 1500W 30V Bidirect SM15T30CA STMicroelectronics 1: HK$12.91 6,814In Stock	Mfr. Part No. SM15T30CA Mouser Part No 511-SM15T30CA	STMicroelectronics	ESD Protection Diodes / TVS Diodes 1500W 30V Bidirect Learn More about STMicroelectronics stm standard products	Datasheet	6,814In Stock	Cut Tape HK$12.91 HK$7.85 HK$6.07 HK$5.36 Reel HK$3.35 View HK$4.23 HK$3.96 HK$3.06 HK$3.01 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
ESD Protection Diodes / TVS Diodes 1500 W 10kW Transil 5.8V tp 70V BI SM15T30CAY STMicroelectronics 1: HK$15.54 14,010In Stock	Mfr. Part No. SM15T30CAY Mouser Part No 511-SM15T30CAY	STMicroelectronics	ESD Protection Diodes / TVS Diodes 1500 W 10kW Transil 5.8V tp 70V BI Learn More about STMicroelectronics stmicro sm15ty transil	Datasheet	14,010In Stock	Cut Tape HK$15.54 HK$9.95 HK$7.42 HK$6.63 Reel HK$4.30 View HK$5.24 HK$4.89 HK$4.10 HK$3.86 MouseReel Available	Min.: 1 Mult.: 1 : 2,500

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