JRSMD1812 Series Surface Mount GDT | High-Current 1812 Package GDT for Signal and Power Line Surge Protection
The JRSMD1812 Series is a surface mount gas discharge tube (GDT) in a standard 1812 footprint (4.5×3.2mm) with 2-pole configuration. It offers robust surge protection for mid-level energy environments, rated for 1kA–3kA (8/20μs) surges with ultra-fast response (<1ns), low capacitance (<1.5pF), and high insulation resistance (>10⁹Ω).
Available with breakdown voltages from 150V to 600V, this series is ideal for RS485/CAN lines, DC power inputs, PoE interfaces, metering communication ports, and power control modules.
| JRPart Number | DC Spark-over Voltage | Maximum Impulse Spark-over Voltage | Minimum Insulation Resistance | Maximum Capacitance | Arc Voltage | Nominal Impulse Diharge Current | Size | |
| JR1812-75CSMD | 75V±20% | ＜600V | ＜700V | 1 GΩ | ＜1.0pF | ~15V | 2 KA | 4.5*3.2*2.7 (1812) |
| JR1812-90CSMD | 90V±20% | ＜600V | ＜700V | 1 GΩ | ＜1.0pF | ~15V | 2 KA | 4.5*3.2*2.7 (1812) |
| JR1812-150CSMD | 150V±20% | ＜600V | ＜700V | 1 GΩ | ＜1.0pF | ~15V | 2 KA | 4.5*3.2*2.7 (1812) |
| JR1812-200CSMD | 200V±20% | ＜600V | ＜750V | 1 GΩ | ＜1.0pF | ~15V | 2 KA | 4.5*3.2*2.7 (1812) |
| JR1812-230CSMD | 230V±20% | ＜600V | ＜750V | 1 GΩ | ＜1.0pF | ~15V | 2 KA | 4.5*3.2*2.7 (1812) |
| JR1812-300CSMD | 300V±20% | ＜800V | ＜900V | 1 GΩ | ＜1.0pF | ~15V | 2 KA | 4.5*3.2*2.7 (1812) |
| JR1812-350CSMD | 350V±20% | ＜800V | ＜900V | 1 GΩ | ＜1.0pF | ~15V | 2 KA | 4.5*3.2*2.7 (1812) |
| JR1812-400CSMD | 400V±20% | ＜900V | ＜1000V | 1 GΩ | ＜1.0pF | ~15V | 2 KA | 4.5*3.2*2.7 (1812) |
| JR1812-420CSMD | 420V±20% | ＜900V | ＜1000V | 1 GΩ | ＜1.0pF | ~15V | 2 KA | 4.5*3.2*2.7 (1812) |
| JR1812-470CSMD | 470V±20% | ＜900V | ＜1000V | 1 GΩ | ＜1.0pF | ~15V | 2 KA | 4.5*3.2*2.7 (1812) |
| JR1812-600CSMD | 600V±20% | ＜1100V | ＜1200V | 1 GΩ | ＜1.0pF | ~15V | 2 KA | 4.5*3.2*2.7 (1812) |
EN