Features
■ RoHS compliant* version available
■ Leadless, surface mount for economical
assembly
■ Low capacitance and insertion loss
■ High surge current rating
■ Fast response to transients
■ Compact “mini” size
2039-xxx-SM Precision, Fast Responding, High Voltage Gas Discharge Tube
Bourns now offers miniature Surface Mount (SM) 2-electrode GDT surge protectors with sparkover voltage up to 1100 V. Compatible with
“pick and place” assembly systems and only 5 mm in diameter, the 2039 Series is ideal for board level protection of high bandwidth
applications such as xDSL, cable broadband and high speed Ethernet. The 2039 Series features high energy-handling capability, long and
stable life performance and low capacitance of less than 1 pF.
Bourns® GDTs are designed to prevent damage from transient disturbances by acting as a “crowbar” to create a short-to-ground circuit
during conduction. When an electrical surge exceeds the defined breakdown voltage level of the GDT, the device becomes ionized and
conduction takes place within a fraction of a microsecond. When the surge passes and system voltage returns to normal levels, the GDT
returns to its high-impedance (off) state.
Characteristics
Test Methods per ITU-T (CCITT) K.12 and IEEE C62.31
Model No.
Characteristic
2039-80-SM
800 V
2039-110-SM
1100 V
DC Sparkover 20 % ꢀ 100 V/s
Impulse Sparkover ꢀ 1000V/μs
1250 V
1500 V
9
Insulation Resistance (IR)................................ 100 V.................................................................> 10 Ω
Arc Voltage ...................................................... 1 A.....................................................................~ 10 V
Glow-Arc Transition Current.......................................................................................................< 0.5 A
Capacitance .................................................... 1 MHz ...............................................................< 1 pF
1
DC Holdover Voltage .................................... 135 V.................................................................< 150 ms
2
Max. Single Discharge .................................. 5 kA...................................................................> 1 operation
2
Impulse Discharge Current.............................. 2.5 kA, 8/20 µs ...............................................> 10 operations
100 A, 10/1000 µs.............................................> 100 operations
10 A, 10/1000 µs ..............................................> 1500 operations
Alternating Discharge Current......................... 2.5 Arms, 1 s.....................................................> 10 operations
Operating and Storage Temperature.......................................................................................... -55 to +85 °C
Climatic Category (IEC 60068-1)................................................................................................ 40/90/21
Notes:
• Surface Mount (SM) parts may show a temporary increase in DCBD after the solder reflow process. Most devices will recover
within 24 hours time. It should be noted that there is no quality defect nor change in protection levels during the temporary change
in DCBD.
8
• Sparkover limits after life +30/-25 %, IR >10 Ω.
• At delivery AQL 0.65 Level II, DIN ISO 2859.
1
2
Network applied.
DC Sparkover may exceed +30/-25 % but will continue to protect without venting.
*RoHS Directive 2002/95/EC Jan 27, 2003 including Annex.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
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