Features
■ High surge current rating, low insertion loss
■ Stable breakdown throughout life
■ RoHS compliant* versions available
■ Balanced Mini-TRIGARD™
(5 mm diameter, 7.5 mm length)
■ Ideal for board level protection of
broadband circuits
■ Symmetrical breakdown voltage (L-L, L-G)
■ Leadless, surface mount for economical
assembly
2038 Series Miniature Symmetrical 3-Electrode Surface Mount Gas Discharge Tube
Bourns offers a symmetrical surface mount (SM) 3-electrode GDT surge protection device. The industry-leading quality and features of the
®
TM
Bourns miniature-TRIGARD series GDT continue in the 2038 symmetrical version. The 2038 series is ideal for board level protection of
high bandwidth applications such as xDSL, cable broadband and high speed Ethernet, due to its symmetrical turn on characteristics as well as
high energy-handling capability, long and stable life performance and low capacitance of less than 1 pF. The 2038 series breakdown
voltages are nearly equal line to line as well as line to ground. Typical 3-electrode GDT line-line breakdown voltages are 1.8-2 times higher
®
than the line to ground breakdown voltage. Bourns Gas Discharge Tubes (GDT) are designed to prevent damage from transient disturbances
by acting as a “crowbar” in creating a virtual short-to-ground circuit during conduction. When an electrical surge exceeds the defined break-
down voltage level of the GDT, the gas becomes ionized and rapid conduction takes place. When the surge passes and the 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
2038-15-SM
2038-20-SM
2038-23-SM
2038-30-SM
2038-35-SM
DC Sparkover 20 ꢀ ꢁ 100 V/s
150 V
200 V
230 V
300 V
350 V
L1/L2 to Grnd and Line 1 to Line 2
Typical Impulse Sparkover
L1/L2 to Grnd and Line 1 to Line 2
100V/μs
350 V
500 V
425 V
575 V
450 V
600 V
500 V
650 V
600 V
750 V
1000V/μs
Model No.
2038-60-SM
Characteristic
2038-42-SM
2038-47-SM
2038-80-SM
2038-110-SM
DC Sparkover 20 ꢀ ꢁ 100 V/s
420 V
470 V
600 V
800 V
1100 V
L1/L2 to Grnd and Line 1 to Line 2
Typical Impulse Sparkover
L1/L2 to Grnd and Line 1 to Line 2
100V/μs
675 V
850 V
750 V
950 V
850 V
1150 V
1400 V
1500 V
1700 V
1000V/μs
1100 V
Impulse Transverse Delay............................... 100 V/µs............................................................< 75 ns
10
Insulation Resistance (IR) ............................... 100 V ................................................................> 10
Glow Voltage ................................................... 10 mA................................................................~ 70 V
Arc Voltage...................................................... 1 A.....................................................................~ 10 V
Glow-Arc Transition Current.......................................................................................................< 0.5 A
Ω
Capacitance..................................................... 1 MHz ...............................................................< 1 pF
1
DC Holdover Voltage .................................... 135 V (80 V for Model 2038-15-SM).................< 150 ms
2
Impulse Discharge Current.............................. 10000 A, 8/20 µs .............................................1 operation min.
5000 A, 8/20 µs.................................................> 10 operations
200 A, 10/1000 µs.............................................> 300 operations
200 A, 10/700 µs ..............................................> 500 operations
10 A, 10/1000 µs ..............................................> 1500 operations
2
Alternating Discharge Current......................... 10 Arms, 1 s ....................................................1 operation min.
5 Arms, 1 s........................................................> 10 operations
Operating Temperature............................................................................................................... -40 to +90 °C
Climatic Category (IEC 60068-1)................................................................................................ 40/90/21
Notes:
• 2038-35 UL Recognized
, file E153537, 2038-110 CSA Approved
, file LR93265 (UL 1449).
• The rated discharge current for Mini-TRIGARD™ GDTs is the total current equally divided between each line to ground.
• 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 25 ꢀ. IR >10 Ω (+30 ꢀ, -25 ꢀ for 2038-60,-80 and -110).
• Operating characteristics per RUS PE-80 and Telcordia GR 1361 available on request.
• At delivery AQL 0.65 Level II, DIN ISO 2859.
1
Network applied.
2
DC Sparkover may exceed 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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