2203380 Phoenix Contact

Features Applications n Low capacitance n DC power supply protection (48 V) n Performance stability over life n High insulation resistance n UL 1449 4th Edition n RoHS compliant* 2033 Series Gas Discharge Tube Surge Protector The Bourns Model 2033 Series is a 2-electrode 5-stack GDT surge arrestor device designed for use with DC power supplies. The series is high current rated with low capacitance and allows for reset of the arrestor without use of external components. Agency Recognition Characteristics Test Methods per ITU-T (CCITT) K.12 and IEEE C62.31 Agency Agency Standard File No. Model No. Characteristic 2033-80 2033-140 1449 - 4th Ed., E313168 DC Sparkover 30 % 100 V/s 800 V 1400 V Type 1 Impulse Sparkover 1.2/50 s, 6 kV < 2000 V < 2300 V Impulse Sparkover 1.2/50 s, 6 kV < 900 V < 950 V See Figure 1, C1-C4 100 pF Insulation Resistance (IR) ...................................................... 100 VDC ........................................................................ > 10 GW (1) DC Operating Voltage ................................................................................................................................................ 60 V 20 % Glow Voltage .......................................................................... 10 mA ............................................................................. ~ 500 V Arc Voltage ............................................................................. 1 A .................................................................................. ~ 100 V Glow-Arc Transition Current ........................................................................................................................................... < 1 A Capacitance............................................................................ 1 MHz ............................................................................. < 1 pF Impulse Discharge Current ..................................................... 20 kA, 8/20 s ................................................................ 10 operations 100 A, 8/20 s ................................................................ 300 operations 4 kA, 10/350 s .............................................................. 5 operations Operating & Storage Temperature .................................................................................................................................. -40 C to +125 C Climatic Category (IEC 60068-1).................................................................................................................................... 40 / 125 / 21 Moisture Sensitivity Level ............................................................................................................................................... 1 ESD Classification (HBM) ............................................................................................................................................... 6 Notes: (1) DC current source 30 A max. At delivery AQL 0.65 Level II, DIN ISO 2859. Bourns recommends reflowing surface mount devices per IPC/JEDEC J-STD-020 rev . D How to Order Typical Part Marking 2033 - xx - G5 - xx LF 2033-80-G5-LF ............................................................... 80 2033 Model Number Designator 2033-140-G5-LF .............................................................. 140 Voltage (Divided by 10) 80 = 800 V 2033 140 = 1400 V Number of Gas Chambers G5 = Five Chambers Packaging Blank = Bulk T1 = Tape and Reel RoHS Compliancy Asia-Pacific: Tel: +886-2 2562-4117 Email: asiacus bourns.com LF = RoHS Compliant Product EMEA: Tel: +36 88 885 877 Email: eurocus bourns.com The Americas: Tel: +1-951 781-5500 Email: americus bourns.com www.bourns.com *RoHS Directive 2015/863, Mar 31, 2015 and Annex. Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 2033 Series Gas Discharge Tube Surge Protector 3312 - 2 mm SMD Trimming Potentiometer Optimizing Model 2033 Series Stacked GDT Turn-on Performance GDT1 GDT2 GDT3 GDT4 C1 C2 Figure 1 C3 C4 Application In high current 48 Vdc supply applications, multiple GDTs are required to be connected in series so that the sum of the arc voltages exceed the dc supply voltage. The combined arc voltages of the stacked GDT (typically 12 V x 5 = 60 V) exceed the 48 Vdc supply which is then not capable of providing enough current to maintain the GDT in an on-state of operation. A stacked GDT design allows for proper reset of the GDT after a transient event. The downside of a stacked design is that the summation of the individual GDT chamber sparkover voltages results in a device with a high impulse sparkover voltage. For example, if each chamber of the stacked GDT had an impulse sparkover voltage of 400 V, the total impulse sparkover for the entire GDT would be 5 x 400 V (2000 V). In many cases, this higher sparkover voltage can have a negative impact to downstream components if their voltage sensitivity is less than the impulse sparkover of the stacked GDT. Solution High impulse sparkover can be improved by utilzing decoupling capacitors across 4 of 5 individual chambers of the stacked GDT. Typical capacitor values can range from 100 pF to 1 nF. How it Works In its intial state, all component values are zero. Under a fast rising voltage ramp condition, there is a capacitive voltage division across GDT1 and C1. During the voltage ramp, most of the voltage appears across GDT1. When the voltage across GDT1 reaches its sparkover voltage (400 V), the voltage across GDT1 drops to its arc voltage which is typically around 12 V. As a result, the capacitor is charged to a value equaling the sparkover voltage less the arc voltage (example: 400 V - 12 V = 388 V) which is then applied to GDT2. When GDT2 reaches 400 V, it then attains sparkover and the process repeats itself until GDT5 finally attains sparkover. This cascading turn-on mechanism of the capacitively coupled GDT chambers result in a signficantly improved impulse sparkover voltage. Results In the table below, both 800 V and 1400 V stacked GDTs were compared using a 5 kV/s voltage ramp. ITU K.12 recommends using a linear ramp as the best method for evaluating GDT impulse sparkover under fast rising voltage conditions. Impulse sparkover voltage limiting is signficantly improved versus using the stacked GDT discretely. It should be noted that there is some improvement in impulse limiting by using a larger capacitor (1 nF). However, the improvement in impulse limiting must be measured against the cost of using a larger capacitor. C1-C4 Model 2033-80 Model 2033-140 Capacitor Values Typical Impulse Sparkover 5 kV/s Typical Impulse Sparkover 5 kV/s No Capacitor 2200 V 2400 V 100 pF 700 V 988 V 1 nF 600 V 886 V NOTE: Impulse sparkover in the characteristic table on Page 1 is shown under combination wave conditions (8/20 s current/1.2x50 s voltage). This non-linear voltage condition will give results different than under a linear ramp speed. The typical values in the table above will differ. Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.