SMD 1812 Mid-to-High Energy Varistor | Surge Protection for Power & Industrial Systems
The SMD 1812 Series Metal Oxide Varistors are surface-mount overvoltage protection components designed for higher energy absorption and surge current endurance. With a 4.6 × 3.2 mm package, they outperform 1210 devices in surge capacity and voltage range, making them ideal for industrial power lines, grid communication nodes, and vehicle electrical systems. Featuring sub-nanosecond response, excellent stability,they support high-density SMT PCB designs.
SMD 1812 Series is widely used in surge protection for:
| Part Number | Working Voltage | Breakdown Voltage | Peak Current | Clamping Voltage | Surge Voltage (V) | ||||
| AC | DC | @ 1mA DC | 8/20uS | 8/20uS | |||||
| VAC | V DC | VB | Ip | A | V | ||||
| 1812 | JR1812-8R0G/H | 4 | 5.5 | 5.5 | 6.6-9.9 | 500A/800A | 1-10 | 18 | 1000V & 2000V |
| JR1812-120G/H | 7 | 9 | 12 | 10.2-13.8 | 500A/800A | 1-10 | 24 | ||
| JR1812-180G/H | 11 | 14 | 18 | 15.3-21.7 | 500A/800A | 1-10 | 30 | ||
| JR1812-220G/H | 12 | 16 | 22 | 19.8-24.2 | 500A/800A | 1-10 | 36 | ||
| JR1812-240G/H | 14 | 18 | 24 | 21.6-26.4 | 500A/800A | 1-10 | 38 | ||
| JR1812-270G/H | 17 | 22 | 27 | 24.3-29.7 | 500A/800A | 1-10 | 44 | ||
| JR1812-300G/H | 18 | 24 | 30 | 27.2-33.0 | 500A/800A | 1-10 | 48 | ||
| JR1812-330G/H | 20 | 26 | 33 | 29.7-36.3 | 500A/800A | 1-10 | 54 | ||
| JR1812-360G/H | 22 | 28 | 36 | 32.7-39.6 | 500A/800A | 1-10 | 59 | ||
| JR1812-390G/H | 25 | 30 | 39 | 35.1-42.9 | 500A/800A | 1-10 | 65 | ||
| JR1812-420G/H | 26 | 33 | 42 | 38.1-46.2 | 500A/800A | 1-10 | 72 | ||
| JR1812-470G/H | 30 | 38 | 47 | 42.3-51.7 | 500A/800A | 1-10 | 77 | ||
| JR1812-560G/H | 35 | 45 | 56 | 50.4-61.6 | 500A/800A | 1-10 | 90 | ||
| JR1812-680G/H | 40 | 56 | 68 | 61.2-74.8 | 500A/800A | 1-10 | 110 | ||
| JR1812-760G/H | 45 | 60 | 76 | 69.1-83.6 | 500A/800A | 1-10 | 126 | ||
| JR1812-820G/H | 50 | 65 | 82 | 73.8-90.2 | 500A/800A | 1-10 | 135 | ||
| JR1812-101G/H | 60 | 85 | 100 | 90-110 | 500A/800A | 1-10 | 165 | ||
| JR1812-121G/H | 75 | 100 | 120 | 108-132 | 500A/800A | 1-10 | 200 | ||
| Part Number | Working Voltage | Breakdown Voltage | Peak Current | Clamping Voltage | Surge Voltage (V) | ||||
| AC | DC | @ 1mA DC | 8/20uS | 8/20uS | |||||
| VAC | V DC | VB | Ip | A | V | ||||
| 1812 High Voltage | JR1812-171G | 110 | 140 | 170 | 154-187 | 500A | 5-10 | 300 | 1000V |
| JR1812-201G | 130 | 170 | 200 | 185-225 | 500A | 5-10 | 340 | ||
| JR1812-221G | 140 | 180 | 220 | 198-242 | 500A | 5-10 | 360 | ||
| JR1812-241G | 150 | 200 | 240 | 216-264 | 500A | 5-10 | 395 | ||
| JR1812-271G | 175 | 225 | 270 | 243-297 | 500A | 5-10 | 455 | ||
| JR1812-391G | 250 | 320 | 270 | 351-429 | 500A | 5-10 | 650 | ||
| JR1812-431G | 275 | 350 | 430 | 387-473 | 500A | 5-10 | 710 | ||
| JR1812-471G | 300 | 385 | 470 | 423-517 | 500A | 5-10 | 775 | ||
| JR1812-511G | 320 | 415 | 510 | 459-561 | 400A | 5-10 | 845 | ||
| JR1812-221H | 140 | 180 | 220 | 198-242 | 800A | 5-10 | 360 | 2000V | |
| JR1812-241H | 150 | 200 | 240 | 216-264 | 1000A | 5-10 | 395 | ||
| JR1812-271H | 175 | 225 | 270 | 243-297 | 1000A | 5-10 | 455 | ||
| JR1812-391H | 250 | 320 | 270 | 351-429 | 1000A | 5-10 | 650 | ||
| JR1812-431H | 275 | 350 | 430 | 387-473 | 1000A | 5-10 | 710 | ||
| JR1812-471H | 300 | 385 | 470 | 423-517 | 1000A | 5-10 | 775 | ||
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