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Lead type lightning protection varistor
The varistor is a voltage-limiting protection device. Utilizing the nonlinear characteristics of the varistor, when overvoltage occurs between the two poles of the varistor, the varistor can clamp the voltage to a relatively fixed voltage value, thereby protecting the subsequent circuit. The main parameters of the varistor are: varistor voltage, current capacity, junction capacitance, response time, etc.
- Commodity name： Lead type lightning protection varistor
- 产品描述
- 产品规格及参数
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The varistor is a voltage-limiting protection device. Utilizing the nonlinear characteristics of the varistor, when overvoltage occurs between the two poles of the varistor, the varistor can clamp the voltage to a relatively fixed voltage value, thereby protecting the subsequent circuit. The main parameters of the varistor are: varistor voltage, current capacity, junction capacitance, response time, etc.
The response time of the varistor is ns level, which is faster than the air discharge tube and slightly slower than the TVS tube. Generally, its response speed can meet the requirements for over-voltage protection of electronic circuits. The junction capacitance of a varistor is generally in the order of hundreds to thousands of Pf. In many cases, it is not suitable to be directly used in the protection of high-frequency signal lines. When used in the protection of AC circuits, its large junction capacitance will increase leakage. Current needs to be fully considered when designing protective circuits. The flow capacity of the varistor is larger, but smaller than that of the gas discharge tube.
The biggest feature of the varistor is that when the voltage applied to it is lower than its threshold "UN", the current flowing through it is extremely small, equivalent to a closed valve. When the voltage exceeds UN, its The resistance becomes smaller, which causes the current flowing through it to surge without much change in the impact on other circuits, thereby reducing the impact of overvoltage on subsequent sensitive circuits. Using this function, abnormal overvoltage that often occurs in the circuit can be suppressed and the circuit can be protected from overvoltage damage.
Product type description:
MYL1 lightning protection varistor has the characteristics of large current capacity, wide voltage range, short response time, good surge suppression, and easy installation and replacement. Therefore, it is widely used in railway automatic signals, traffic control centers, communication relay stations, low-voltage power distribution, semiconductor devices and various electrical equipment operating over-voltage protection and atmospheric over-voltage protection.
1. Characteristics
●Wide voltage range (47V～1200V)
● Large nonlinear coefficient
● Large flow capacity
● Fast response time (≤20ns)
2. Main uses
● Semiconductor device protection
● Surge overvoltage protection for household appliances
● Surge overvoltage protection for communication, measurement and control instruments
● Overvoltage protection for solenoid valve and relay operation 3. Model name, appearance, structure and dimensions:
The MYLA type is a lead type varistor, and the MYLB type is an electrode sheet type lightning protection varistor.
3. Appearance structure and dimensions: (mm)
Specification
Overall dimensions (mm)
Dmax Tmax Lmin F±1 d±0.1 25D 31.0 15.5 20 10~13 1.0 32D 37.0 15.5 20 20~25 1.5 40D 45.0 15.5 20 20~25 1.5 50D 56.0 18.5 25 20~25 1.5 60D 66.0 18.5 25 20~25 1.5 
4. Main technical parameters:
modelMaximum continuous operating voltageVaristor voltageMaximum limit
voltageFlow capacity (8/20u s)Maximum energy
(J)capacitanceAC(V)DC(V)V1mAVp(V)lp(A)1 time(A)2 times (A)2ms1KH Z (pF)SCMYL1 □ 25D201 K 130 170 200(180-220) 340 150 15000 10000 100 3200 SCMYL1□25D221K 140 180 220(198-242) 360 150 15000 10000 120 3100 SCMYL1□25D241K 150 200 240(216-264) 395 150 15000 10000 130 3000 SCMYL1□25D271K 175 225 270(243-297) 455 150 15000 10000 160 2800 SCMYL1□25D301K 190 245 300(270-330) 495 150 15000 10000 160 2500 SCMYL1□25D331K 215 275 330(297-363) 540 150 15000 10000 160 2100 SCMYL1□25D361K 230 300 360(324-396) 595 150 15000 10000 180 1850 SCMYL1□25D391K 250 320 390(351-429) 650 150 15000 10000 200 1500 SCMYL1□25D431K 275 350 430(387-473) 710 150 15000 10000 220 1250 SCMYL1□25D471K 300 385 470(423-517) 775 150 15000 10000 250 1100 SCMYL1□25D511K 320 415 510(459-561) 855 150 15000 10000 270 1000 SCMYL1□25D561K 350 455 560(504-616) 945 150 15000 10000 270 950 SCMYL1□25D621K 380 505 620(558-682) 1025 150 15000 10000 270 900 SCMYL1□25D681K 420 560 680(612-748) 1120 150 15000 10000 270 850 SCMYL1□25D751K 460 615 750(675-825) 1240 150 15000 10000 300 800 SCMYL1□25D821K 510 670 820(738-902) 1355 150 15000 10000 300 750 SCMYL1□25D911K 550 745 910(819-1001) 1500 150 15000 10000 325 720 SCMYL1□25D102K 625 825 1000(900-1100) 1650 150 15000 10000 360 680 SCMYL1□25D112K 680 895 1100(990-1210) 1815 150 15000 10000 400 650 SCMYL1□25D122K 705 970 1200(1080-1320) 1980 150 15000 10000 440 600 SCMYL1□34S201K 130 170 200(185-225) 340 200 25000 20000 270 6900 SCMYL1□34S221K 140 180 220(198-242) 360 200 25000 20000 270 6300 SCMYL1□34S241K 150 200 240(216-264) 395 200 25000 20000 300 5400 SCMYL1□34S271K 175 225 270(243-297) 455 200 25000 20000 300 4900 SCMYL1□34S301K 190 245 300(270-330) 495 200 25000 20000 330 4200 SCMYL1□34S331K 215 275 330(297-363) 540 200 25000 20000 350 3950 SCMYL1□34S361K 230 300 360(324-396) 595 200 25000 20000 350 3700 SCMYL1□34S391K 250 320 390(351-429) 650 200 25000 20000 370 3400 SCMYL1□34S431K 275 350 430(387-473) 710 200 25000 20000 400 3200 SCMYL1□34S471K 300 385 470(423-517) 775 200 25000 20000 430 3000 SCMYL1□34S511K 320 415 510(459-561) 855 200 25000 20000 460 2800 SCMYL1□34S561K 350 455 560(504-616) 945 200 25000 20000 500 2600 SCMYL1□34S621K 380 505 620(558-682) 1025 200 25000 20000 550 2450 SCMYL1□34S681K 420 560 680(612-748) 1120 200 25000 20000 600 2200 SCMYL1□34S751K 460 615 750(675-825) 1240 200 25000 20000 650 1700 SCMYL1□34S821K 510 670 820(738-902) 1355 200 25000 20000 700 1400 SCMYL1□34S911K 550 745 910(819-1001) 1500 200 25000 20000 750 1300 SCMYL1□34S102K 625 825 1000(900-1100) 1650 200 25000 20000 800 1150 SCMYL1□34S112K 680 895 1100(990-1210) 1815 200 25000 20000 900 850 SCMYL1□34S122K 705 970 1200(1080-1320) 1980 200 25000 20000 1050 740 SCMYL1□40D201K 130 170 200(185-225) 340 400 30000 20000 270 8000 SCMYL1□40D221K 140 180 220(198-242) 360 400 30000 20000 300 7900 SCMYL1□40D241K 150 200 240(216-264) 395 400 30000 20000 300 7800 SCMYL1□40D271K 175 225 270(243-297) 455 400 30000 20000 300 7500 SCMYL1□40D301K 190 245 300(270-330) 495 400 30000 20000 330 7300 SCMYL1□40D331K 215 275 330(297-363) 540 400 30000 20000 350 6800 SCMYL1□40D361K 230 300 360(324-396) 595 400 30000 20000 350 6300 SCMYL1□40D391K 250 320 390(351-429) 650 400 30000 20000 370 6000 SCMYL1□40D431K 275 350 430(387-473) 710 400 30000 20000 400 5500 SCMYL1□40D471K 300 385 470(423-517) 775 400 30000 20000 430 5000 SCMYL1□40D511K 320 415 510(459-561) 855 400 40000 25000 460 4700 SCMYL1□40D561K 350 455 560(504-616) 945 400 40000 25000 500 4450 SCMYL1□40D621K 380 505 620(558-682) 1025 400 40000 25000 550 4100 SCMYL1□40D681K 420 560 680(612-748) 1120 400 40000 25000 600
3700 SCMYL1□40D751K 460 615 750(675-825) 1240 400 40000 25000 650 3500 SCMYL1□40D781K 485 640 780(702-858) 1280 400 40000 25000 650 3100 SCMYL1□40D821K 510 670 820(738-902) 1355 400 40000
25000 700 2700 SCMYL1□40D911K 550 745 910(819-1001) 1500 400 40000 25000 750 2450 SCMYL1□40D102K 625 825 1000(900-1100) 1650 400 40000 25000 800 2100 SCMYL1□40D112K 680 895 1100(990-1210) 1815 400 40000 25000 900 1700 SCMYL1□60D201K 130 170 200(185-225) 340 500 50000 30000 450 16000 SCMYL1□60D221K 140 180 220(198-242) 360 500 50000 30000 450 15000 SCMYL1□60D241K 150 200 240(216-264) 395 500 50000 30000 530 14500 SCMYL1□60D271K 175 225 270(243-297) 455 500 50000 30000 550 12000 SCMYL1□60D301K 190 245 300(270-330) 495 500 50000 30000 600 10500 SCMYL1□60D331K 215 275 330(297-363) 540 500 50000 30000 650 9500 SCMYL1□60D361K 230 300 360(324-396) 595 500 70000 45000 700 8300 SCMYL1□60D391K 250 320 390(351-429) 650 500 70000 45000 880 7600 SCMYL1□60D431K 275 350 430(387-473) 710 500 70000 45000 950 7000 SCMYL1□60D471K 300 385 470(423-517) 775 500 70000 45000 1000 6500 SCMYL1□60D511K 320 415 510(459-561) 855 500 70000 45000 1100 5200 SCMYL1□60D561K 350 455 560(504-616) 945 500 70000 45000 1200 4500 SCMYL1□60D621K 380 505 620(558-682) 1025 500 70000 45000 1300 4000 SCMYL1□60D681K 420 560 680(612-748) 1120 500 70000 45000 1500 3600 SCMYL1□60D751K 460 615 750(675-825) 1240 500 70000 45000 1500 3100 SCMYL1□60D781K 485 640 780(702-858) 1280 500 70000 45000 1600 2850 SCMYL1□60D821K 510 670 820(738-902) 1355 500 70000 45000 1800 2700 SCMYL1□60D911K 550 745 910(819-1001) 1500 500 70000 45000 2000 2500 SCMYL1□60D102K 625 825 1000(900-1100) 1650 500 70000 45000 2300 2300 SCMYL1□60D112K 680 895 1100(990-1210) 1815 500 70000 45000 2600 2000 SCMYL1□60D122K 705 970 1200(1080-1320) 1980 500 70000 45000 2600 1900 Note:
②The electrical parameters of SCMYL1B and SCMYL1C products refer to SCMYL1A products.
③Operating Temperature Range: -40to85℃
④Storage Temperature Range: -40to110℃
The company can also produce higher voltage varistors according to customer requirements. Currently, the company can produce the highest varistor. The voltage is 2700V
Key words:
Lead type lightning protection varistor
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