Surface Mount 2-Electrode Gas Discharge Tube (GDT) UN1812 Series Description Gas discharge Tubes (GDT) are classical components for protecting the installations of the telecommunications. It is essential that IT and telecommunications systems -with their high-grade but sensitive electronic circuits - be protected by arresters. The 1812 series GDT offers high surge ratings in a miniature package. It’s designed for surface mounting on PCB with small size 4.5x3.2x2.7mm. Low insertion loss is perfectly suited to broadband equipment applications. The capacitance does not vary with voltage, and will not cause operational problems with ADSL2+, Schematic Symbol where capacitance variation across Tip and Ring is undesirable. These devices are extremely robust and are able to divert a 500A pulse in a miniature package 1812 without destruction. Agency Approvals Features u u u u u u u Non-Radioactive RoHS compliant Ultra low capacitance (<1.0 pF) UL recognized Excellent response to fast rising transients 2KA surge capability tested with 8/20μs pulse as defined by IEC 61000-4-5 Square Outline AGENCY E341061 Product Characteristics Applications u u u u u u u u u u u u Communication equipment CATV equipment Test equipment Data lines Power supplies Telecom SLIC protection Broadband equipment ADSL equipment, including ADSL2+ XDSL equipment Satellite and CATV equipment General telecom equipment ESD protection Materials Dull Tin-plated Product Marking Without Storage and Operational Temperature -40 to +90°C Weight ~180mg Climatic category (IEC 60068-1) SOCAY Electronics Co., Ltd. Revision March 6, 2014 AGENCY FILE NUMBER 40/ 90/ 21 www.socay.com 1/4 @SOCAY Electronics Co., Ltd. 2014 Specifications are subject to change without notice. Please refer to www.socay.com for current information. Surface Mount 2-Electrode Gas Discharge Tube (GDT) UN1812 Series Device Dimensions (Unit: mm) Recommended pad outline Electrical Characteristics Part Number DC Spark-over Voltage Maximum Impulse Spark-over Voltage Minimum Insulation Resistance Maximum Capacitance Arc Voltage Nominal Impulse Discharge Current @1MHz @1A @8/20μs ±5 times @100V/S @100V/μs @1KV/μs UN1812-90CSMD 90V±20% ＜600V ＜700V 1 GΩ (at 50V DC) ＜1.0pF ~15V 2 KA UN1812-150CSMD 150V±20% ＜600V ＜700V 1 GΩ (at 50V DC) ＜1.0pF ~15V 2 KA UN1812-200CSMD 200V±20% ＜600V ＜750V 1 GΩ (at 100V DC) ＜1.0pF ~15V 2 KA UN1812-230CSMD 230V±20% ＜600V ＜750V 1 GΩ (at 100V DC) ＜1.0pF ~15V 2 KA UN1812-300CSMD 300V±20% ＜800V ＜900V 1 GΩ (at 100V DC) ＜1.0pF ~15V 2 KA UN1812-350CSMD 350V±20% ＜800V ＜900V 1 GΩ (at 100V DC) ＜1.0pF ~15V 2 KA UN1812-400CSMD 400V±20% ＜900V ＜1000V 1 GΩ (at 100V DC) ＜1.0pF ~15V 2 KA UN1812-470CSMD 470V±20% ＜900V ＜1000V 1 GΩ (at 100V DC) ＜1.0pF ~15V 2 KA UN1812-400CSMD+ ＞400V ＜900V ＜1000V 1 GΩ (at 100V DC) ＜1.0pF ~15V 2 KA UN1812-600CSMD 600V±20% ＜1100V ＜1200V 1 GΩ (at 100V DC) ＜1.0pF ~15V 2 KA Notes: 1. Terms in accordance with ITU-T K.12 and GB/T 9043-2008 2. At delivery AQL 0.65 level Ⅱ, DIN ISO 2859 SOCAY Electronics Co., Ltd. Revision March 6, 2014 www.socay.com 2/4 @SOCAY Electronics Co., Ltd. 2014 Specifications are subject to change without notice. Please refer to www.socay.com for current information. Surface Mount 2-Electrode Gas Discharge Tube (GDT) UN1812 Series Electrical Rating Item Test Condition / Description DC Spark-over Voltage Impulse Spark-over Voltage Insulation Resistance Capacitance Requirement The voltage is measured with a slowly rate of rise dv / dt=100V/s The maximum impulse spark-over voltage is measured with a rise time of dv / dt=100V//μs or 1KV/μs The resistance of gas tube shall be measured each terminal each other terminal, please see above spec. The capacitance of gas tube shall be measured each terminal to each other terminal. Test frequency :1MHz The maximum current applying a waveform of 8/20μs that can be applied across the terminals of the gas tube. One hour after the test is completed, re-testing of the DC spark-over voltage does not exceed ±30% of the nominal DC spark-over voltage. Dwell time between pulses is 3 minutes. I To meet the specified value 1.0 0.9 Nominal Impulse Discharge Current 0.5 0.1 0.0 8μsec 20μsec 30% Max T Recommended soldering profile Reflow Condition Pb - Free assembly -Temperature Min (Ts(min)) TP Ramp-up Pre Heat Critical Zone TL to TP Temperature TL TS(max) Ramp-down TS(min) 200°C - Time (min to max) (ts) 60 -180 Seconds 3°C/second max TS(max) to TL - Ramp-up Rate 5°C/second max - Temperature (TL) (Liquidus) 217°C - Time (min to max) (ts) 60 -150 Seconds Peak Temperature (TP) 25 Time to peak temperature (t 25℃ to peak) Time Time within 5°C Temperature (tp) SOCAY Electronics Co., Ltd. Revision March 6, 2014 -Temperature Max (Ts(max)) Average ramp up rate ( Liquidus Temp TL) to peak Reflow Preheat 150°C 260 +0/-5°C of actual peak 10 - 30 Seconds Ramp-down Rate 6°C/second max Time 25°C to peak Temperature (TP) 8 minutes Max Do not exceed 260°C www.socay.com 3/4 @SOCAY Electronics Co., Ltd. 2014 Specifications are subject to change without notice. Please refer to www.socay.com for current information. Surface Mount 2-Electrode Gas Discharge Tube (GDT) UN1812 Series Part Numbering UN1812 – XXX C SMD SMD, Surface Mount 8/20μs Level C, 2KA Nominal DC Spark-over Voltage 150 = 150V 200 = 200V 350 = 350V 400 = 400V Series Tape and Reel Dimensions Unit: mm Packaging Part Number Description Quantity UN1812-XXXCSMD 12mm Tape & 13″ Reel 2500 Cautions and warnings u Gas discharge tubes (GDT) must not be operated directly in power supply networks. u Gas discharge tubes (GDT) may become hot in case of longer periods of current stress (danger of burning). u Gas discharge tubes (GDT) may be used only within their specified values. In the event of overload, the head contacts may fail or the component may be destroyed. u Damaged Gas discharge tubes (GDT) must not be re-used. SOCAY Electronics Co., Ltd. Revision March 6, 2014 www.socay.com 4/4 @SOCAY Electronics Co., Ltd. 2014 Specifications are subject to change without notice. Please refer to www.socay.com for current information.