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RS-485 ESD, Lightning, & Power Fault Protection

Littelfuse RS-485 ESD, Lightning, and Power Fault Protection feature polymeric positive temperature coefficients (PPTCs) that can protect against short circuit and power crosses. The RS-485 product line includes the resettable PPTCs, TVS diodes, GDTs, and SIDACtor series. The TVS Diode Arrays and SM712 series are specifically designed to protect RS-485 applications from ESD, EFT, and lightning-induced surges. When lightning occurs, the SIDACtor will react by causing voltage to increase across PPTC until GDT fires.

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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.
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 3MM 90V 2POLE SMT GDT GTCS23-900M-R01-2 Littelfuse 1: HK$8.06 46,996In Stock	Mfr. Part No. GTCS23-900M-R01-2 Mouser Part No 650-GTCS23-900MR01-2	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 3MM 90V 2POLE SMT GDT Learn More about Littelfuse gas discharge tubes	Datasheet	46,996In Stock	Cut Tape HK$8.06 HK$7.40 HK$6.14 HK$5.66 Reel HK$3.98 View HK$5.09 HK$4.69 HK$4.67 HK$3.81 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 6MM 90V 3POLE RADIAL LEADS GDT GTCR36-900M-R10 Littelfuse 1: HK$26.72 1,192In Stock	Mfr. Part No. GTCR36-900M-R10 Mouser Part No 650-GTCR36-900M-R10	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 6MM 90V 3POLE RADIAL LEADS GDT Learn More about Littelfuse gas discharge tubes	Datasheet	1,192In Stock	HK$26.72 HK$22.19 HK$20.47 HK$17.02 View HK$14.30 HK$13.40 HK$12.66 HK$11.84 HK$11.59	Min.: 1 Mult.: 1
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STANDARD 600V NOMINAL CG5600L Littelfuse 1: HK$21.87 1,221In Stock	Mfr. Part No. CG5600L Mouser Part No 576-CG5600L	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP S.A. STANDARD 600V NOMINAL	Datasheet	1,221In Stock	Cut Tape HK$21.87 HK$19.40 HK$18.00 HK$15.04 View Reel HK$9.54 HK$13.40 HK$12.33 HK$10.44 HK$9.54	Min.: 1 Mult.: 1 : 1,000
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 3000V 2POLE AXIAL LEAD HV GDT GTCA28-302M-R03 Littelfuse 1: HK$27.13 978In Stock	Mfr. Part No. GTCA28-302M-R03 Mouser Part No 650-GTCA28-302M-R03	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 3000V 2POLE AXIAL LEAD HV GDT Learn More about Littelfuse GTCA28 gdts	Datasheet	978In Stock	HK$27.13 HK$21.87 HK$20.80 HK$18.00 View HK$16.85 HK$15.95 HK$15.86	Min.: 1 Mult.: 1
Resettable Fuses - PPTC .15A 250Vdc 600Vrms TRF600-150-B-0.5-2 Littelfuse 1: HK$10.19 7,531In Stock	Mfr. Part No. TRF600-150-B-0.5-2 Mouser Part No 650-TRF600-150B0.5-2	Littelfuse	Resettable Fuses - PPTC .15A 250Vdc 600Vrms Learn More about Littelfuse telecom ptcs	Datasheet	7,531In Stock	Cut Tape HK$10.19 HK$7.93 HK$7.09 HK$6.58 Reel HK$4.85 View HK$5.98 HK$5.09 HK$4.63 HK$4.48	Min.: 1 Mult.: 1 : 1,500
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GTCR38-601M-R20 Littelfuse 1: HK$48.50 951In Stock	Mfr. Part No. GTCR38-601M-R20 Mouser Part No 650-GTCR38-601M-R20	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors Learn More about Littelfuse gas discharge tubes	Datasheet	951In Stock	HK$48.50 HK$40.20 HK$37.15 HK$30.83 View HK$28.44 HK$25.48 HK$23.51 HK$22.36	Min.: 1 Mult.: 1
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 5MM 90V2POLE SMT GDT GTCS25-900M-R02 Littelfuse 1: HK$25.81 3,661In Stock	Mfr. Part No. GTCS25-900M-R02 Mouser Part No 650-GTCS25-900M-R02	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 5MM 90V2POLE SMT GDT Learn More about Littelfuse gas discharge tubes	Datasheet	3,661In Stock	HK$25.81 HK$21.45 HK$19.81 HK$16.44 View HK$13.65 HK$12.58 HK$11.59 HK$11.26 HK$10.85	Min.: 1 Mult.: 1
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 1000V 2POLE AXIAL LEAD HV GDT GTCA28-102M-R03 Littelfuse 1: HK$35.43 745In Stock	Mfr. Part No. GTCA28-102M-R03 Mouser Part No 650-GTCA28-102M-R03	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 1000V 2POLE AXIAL LEAD HV GDT Learn More about Littelfuse GTCA28 gdts	Datasheet	745In Stock	HK$35.43 HK$29.43 HK$27.13 HK$22.52 View HK$20.80 HK$18.66 HK$17.18 HK$15.86	Min.: 1 Mult.: 1
Resettable Fuses - PPTC Polyswitch 0.26A TS250-130F-2 Littelfuse 1: HK$8.63 4,255In Stock	Mfr. Part No. TS250-130F-2 Mouser Part No 650-TS250-130F-2	Littelfuse	Resettable Fuses - PPTC Polyswitch 0.26A Learn More about Littelfuse telecom ptcs	Datasheet	4,255In Stock	Cut Tape HK$8.63 HK$7.99 HK$7.29 HK$6.83 Reel HK$4.86 View HK$6.35 HK$6.05 HK$4.57 MouseReel Available	Min.: 1 Mult.: 1 : 1,500
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors STANDARD 90V NOM CG590L Littelfuse 1: HK$28.69 2,349In Stock	Mfr. Part No. CG590L Mouser Part No 576-CG590L	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors STANDARD 90V NOM	Datasheet	2,349In Stock	Cut Tape HK$28.69 HK$23.84 HK$22.03 HK$18.25 View Reel HK$11.18 HK$16.85 HK$15.12 HK$13.97 HK$11.18	Min.: 1 Mult.: 1 : 1,000
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 2100V 2POLE AXIAL LEAD HV GDT GTCA28-212M-R03 Littelfuse 1: HK$35.43 1,456In Stock	Mfr. Part No. GTCA28-212M-R03 Mouser Part No 650-GTCA28-212M-R03	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 2100V 2POLE AXIAL LEAD HV GDT Learn More about Littelfuse GTCA28 gdts	Datasheet	1,456In Stock	HK$35.43 HK$29.43 HK$27.13 HK$22.52 View HK$20.80 HK$18.66 HK$17.18 HK$16.36 HK$15.86	Min.: 1 Mult.: 1
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 90V 3POLE AXIAL LEADS GDT GTCA38-900M-R10 Littelfuse 1: HK$25.24 1,011In Stock	Mfr. Part No. GTCA38-900M-R10 Mouser Part No 650-GTCA38-900M-R10	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 90V 3POLE AXIAL LEADS GDT Learn More about Littelfuse gas discharge tubes	Datasheet	1,011In Stock	HK$25.24 HK$20.96 HK$19.40 HK$16.11 View HK$14.80 HK$13.32 HK$12.25 HK$11.26 HK$10.93	Min.: 1 Mult.: 1
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 4000V 2POLE AXIAL LEAD HV GDT GTCA28-402M-R03 Littelfuse 1: HK$42.09 995In Stock	Mfr. Part No. GTCA28-402M-R03 Mouser Part No 650-GTCA28-402M-R03	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 4000V 2POLE AXIAL LEAD HV GDT Learn More about Littelfuse GTCA28 gdts	Datasheet	995In Stock	HK$42.09 HK$38.06 HK$35.10 HK$29.10 View HK$24.99 HK$23.76 HK$20.71 HK$19.73	Min.: 1 Mult.: 1
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 3MM 200V 2POLE CHIP TYPE SMT GTCC23-201M-R01-2 Littelfuse 1: HK$9.29 2,341In Stock	Mfr. Part No. GTCC23-201M-R01-2 Mouser Part No 650-GTCC23-201MR01-2	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 3MM 200V 2POLE CHIP TYPE SMT Learn More about Littelfuse gas discharge tubes	Datasheet	2,341In Stock	Cut Tape HK$9.29 HK$8.55 HK$7.06 HK$6.52 Reel HK$4.44 View HK$5.44 HK$4.59 HK$4.36 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 315-525V 2A GDT T/R 2 Term SG420 Littelfuse 1: HK$8.96 2,525In Stock	Mfr. Part No. SG420 Mouser Part No 576-SG420	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 315-525V 2A GDT T/R 2 Term Learn More about Littelfuse sg series sgdt	Datasheet	2,525In Stock	Cut Tape HK$8.96 HK$7.64 HK$6.62 HK$6.19 View Reel HK$5.14 HK$5.81 HK$5.46 HK$5.19 HK$5.14 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 75V 2POLE SMT GDT GTCS28-750M-R05-2 Littelfuse 1: HK$24.74 1,773In Stock	Mfr. Part No. GTCS28-750M-R05-2 Mouser Part No 650-GTCS28-750MR05-2	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 75V 2POLE SMT GDT Learn More about Littelfuse gas discharge tubes	Datasheet	1,773In Stock	Cut Tape HK$24.74 HK$23.26 HK$22.03 HK$17.76 Reel HK$11.75 View HK$15.04 HK$14.71 HK$11.01 HK$10.03 MouseReel Available	Min.: 1 Mult.: 1 : 500
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 5MM 230V 3POLE SMT GDT GTCS35-231M-R05 Littelfuse 1: HK$13.56 2,130In Stock	Mfr. Part No. GTCS35-231M-R05 Mouser Part No 650-GTCS35-231M-R05	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 5MM 230V 3POLE SMT GDT Learn More about Littelfuse gas discharge tubes	Datasheet	2,130In Stock	HK$13.56 HK$12.49 HK$10.36 HK$9.62 View HK$8.63 HK$7.91 HK$7.90 HK$6.77	Min.: 1 Mult.: 1
Resettable Fuses - PPTC 250V .12A-HD 3A MAX TRF250-120-2 Littelfuse 1: HK$6.25 2,551In Stock	Mfr. Part No. TRF250-120-2 Mouser Part No 650-TRF250-120-2	Littelfuse	Resettable Fuses - PPTC 250V .12A-HD 3A MAX Learn More about Littelfuse telecom ptcs	Datasheet	2,551In Stock	Cut Tape HK$6.25 HK$5.59 HK$5.21 HK$4.77 Reel HK$3.12 View HK$4.41 HK$3.89 HK$2.81 HK$2.80	Min.: 1 Mult.: 1 : 1,500
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 6MM 50V 2POLE AXIAL LEADS GDT GTCA26-501M-R05 Littelfuse 1: HK$27.87 701In Stock	Mfr. Part No. GTCA26-501M-R05 Mouser Part No 650-GTCA26-501M-R05	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 6MM 50V 2POLE AXIAL LEADS GDT Learn More about Littelfuse gas discharge tubes	Datasheet	701In Stock	HK$27.87 HK$23.76 HK$22.19 HK$18.17 View HK$16.36 HK$14.88 HK$13.56 HK$12.00 HK$11.75	Min.: 1 Mult.: 1
Thyristor Surge Protection Devices - TSPD 500A 170V P1800SCMCLRP Littelfuse 1: HK$13.81 1,747In Stock	Mfr. Part No. P1800SCMCLRP Mouser Part No 576-P1800SCMCLRP	Littelfuse	Thyristor Surge Protection Devices - TSPD 500A 170V Learn More about Littelfuse p 0s mclrp thyristors	Datasheet	1,747In Stock	Cut Tape HK$13.81 HK$8.55 HK$6.22 HK$5.29 HK$4.93 Reel HK$4.85 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 6MM 90V 2POLE AXIAL LEADS GDT GTCA26-900M-R05 Littelfuse 1: HK$26.80 14In Stock 1,000Expected 1/3/2027	Mfr. Part No. GTCA26-900M-R05 Mouser Part No 650-GTCA26-900M-R05	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 6MM 90V 2POLE AXIAL LEADS GDT Learn More about Littelfuse gas discharge tubes	Datasheet	14In Stock 1,000Expected 1/3/2027	HK$26.80 HK$24.41 HK$23.59 HK$18.50 View HK$15.70 HK$14.71 HK$12.99 HK$12.74 HK$12.41	Min.: 1 Mult.: 1
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 3600V 2POLE AXIAL LEAD HV GDT GTCA28-362M-R03 Littelfuse 1: HK$42.09 369In Stock 1,000Expected 23/2/2027	Mfr. Part No. GTCA28-362M-R03 Mouser Part No 650-GTCA28-362M-R03	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 3600V 2POLE AXIAL LEAD HV GDT Learn More about Littelfuse GTCA28 gdts	Datasheet	369In Stock 1,000Expected 23/2/2027	HK$42.09 HK$38.06 HK$35.10 HK$29.10 View HK$24.99 HK$23.76 HK$19.73	Min.: 1 Mult.: 1
Thyristor Surge Protection Devices - TSPD 500A 90V P1100SCMCLRP Littelfuse 1: HK$15.86 2,616In Stock	Mfr. Part No. P1100SCMCLRP Mouser Part No 576-P1100SCMCLRP	Littelfuse	Thyristor Surge Protection Devices - TSPD 500A 90V Learn More about Littelfuse p 0s mclrp thyristors	Datasheet	2,616In Stock	Cut Tape HK$15.86 HK$10.19 HK$7.16 HK$5.75 HK$5.22 Reel HK$4.85 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 263-437V 2A GDT T/R 2 Term SG350 Littelfuse 1: HK$11.75 1,995In Stock	Mfr. Part No. SG350 Mouser Part No 576-SG350	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 263-437V 2A GDT T/R 2 Term Learn More about Littelfuse sg series sgdt	Datasheet	1,995In Stock	Cut Tape HK$11.75 HK$10.85 HK$8.96 HK$8.30 Reel HK$5.23 View HK$7.43 HK$6.86 HK$6.35 HK$5.14 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 230V 2POLE SMT GDT GTCS28-231M-R10-2 Littelfuse 1: HK$24.74 279In Stock	Mfr. Part No. GTCS28-231M-R10-2 Mouser Part No 650-GTCS28-231MR10-2	Littelfuse	Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 8MM 230V 2POLE SMT GDT Learn More about Littelfuse gas discharge tubes	Datasheet	279In Stock	Cut Tape HK$24.74 HK$23.26 HK$22.03 HK$17.76 Reel HK$13.15 View HK$15.04 HK$14.71 HK$11.67 MouseReel Available	Min.: 1 Mult.: 1 : 500