Features Applications

TN
■ Compact size: 5.5 mm diameter, ■ Telecommunications equipment

IA
PL
6 mm length
M
CO ■ Industrial equipment/electronics
S

■ Low capacitance
oH

■ Consumer electronics
*R

■ Low leakage
■ RoHS compliant*
■ UL Recognized

2057 Series Light Duty 2-Electrode Miniature Gas Discharge Tube

Characteristics

Test Methods per ITU-T K.12 and IEC 61643-311.

Model No.
Characteristic
2057-07 2057-09 2057-12 2057-13 2057-15 2057-23
DC Sparkover ±20 % @ 100 V/s 75 V 90 V 120 V 130 V 150 V 230 V
(1)
Impulse Sparkover
100 V/μs < 700 V < 600 V < 600 V < 600 V < 600 V < 600 V
1000 V/μs < 800 V < 700 V < 700 V < 700 V < 700 V < 700 V

Model No.
Characteristic
2057-25 2057-30 2057-35 2057-40 2057-47
DC Sparkover ±20 % @ 100 V/s 250 V 300 V 350 V 400 V 470 V
(1)
Impulse Sparkover
100 V/μs < 600 V < 700 V < 700 V < 800 V < 900 V
1000 V/μs < 700 V < 900 V < 900 V < 1000 V < 1100 V
(1)
Impulse Sparkover voltage is defined as typical values of distribution.

Insulation Resistance (IR) (2) ....................................50 / 100 / 250 Vdc ................................................. > 1 GΩ
Glow Voltage ...........................................................10 mA ..................................................................... ~ 70 V
Arc Voltage ..............................................................1 A .......................................................................... ~ 10 V
Glow-Arc Transition Current .................................................................................................................... < 1 A
Maximum Capacitance ............................................1 MHz ..................................................................... < 1 pF
Maximum Impulse Discharge Current .....................10,000 A, 8/20 μs .................................................. 1 operation
5,000 A, 8/20 μs ..................................................... 10 operations
Nominal Alternating Discharge Current ...................5 A, 50 Hz, 1 second .............................................. 1 operation
15 A, 9 cycles ........................................................ 1 operation
Impulse Life ............................................................100 A, 10/1000 μs .................................................. 300 operations
DC Holdover Voltage (3) ........................................................................................................................... < 150 ms
Operating Temperature............................................................................................................................ -40 to +90 ºC
Storage Temperature ............................................................................................................................... -40 to +90 °C
Climatic Category (IEC 60068-1)............................................................................................................. 40 / 90 / 21
Notes:
• UL Recognized component, UL File E153537.
• At delivery AQL 0.65, level II DIN ISO 2859

(2)
DC Sparkover Voltage DC Measuring Voltage
75–90 V 50 V
120–400 V 100 V
470 V 250 V

(3)
Network Applied
DC Sparkover Voltage DC Holdover Voltage
75–145 V 52 V
230–250 V 80 V
300–470 V 150 V

*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
WARNING Cancer and Reproductive Harm applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the
www.P65Warnings.ca.gov last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
 2057 Series Light Duty 2-Electrode Miniature Gas Discharge Tube
Product Dimensions

0.8 ± 0.05
20
MIN. (.031 ± .002)
(0.78)
DIA.
LONG
2 PLCS.
5.5 +0.3/-0.5
(.217 + .012/-.020)
DIA.

MM
DIMENSIONS:
6.0 +0.3/-0.5 (INCHES)
(.236 +.012/-.020)

Packaging Specifications
Model 2057 ships standard bulk, 100 pcs. per tray; 5 trays per box (500 units). The optional reelpack (-BT1) contains 500 pcs. per reel;
2 reels per box (1K units).

6.0 + 1.4 330 ± 4.0

(.236 +.055) (12.992 ± .157)
MAX. DIA. 1.5
(.059)
TYP.

10.0 ± 0.5
(.394 ± .020)

100.0
(3.937)
TYP.

52 ± 2
(2.047 ± .079) MM
DIMENSIONS: 68.0
(INCHES) TYP.
(2.677)
64 ± 3
(2.520 ± .118)

How to Order
2057 - xx - B T1 LF
Model Number Designator
Voltage (Divided by 10)
07 = 75 V 25 = 250 V Asia-Pacific:
09 = 90 V 30 = 300 V Tel: +886-2 2562-4117
12 = 120 V 35 = 350 V Email: asiacus@bourns.com
13 = 130 V 40 = 400 V
15 = 150 V 47 = 470 V Europe:
23 = 230 V Tel: +36 88 885 877
Leads Email: eurocus@bourns.com
B = 0.8 mm
The Americas:
Packaging Tel: +1-951 781-5500
(Blank) = Bulk Packaging (Standard)
T1 = Reelpack (Optional) Email: americus@bourns.com
RoHS Compliancy www.bourns.com
LF = RoHS Compliant Product

REV. B 09/19
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 disclaimers as set forth on the last page of this document, and at www.bourns.com/legal/disclaimer.pdf.
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*9
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Bourns:
2057-23-BLF 2057-07-BLF 2057-09-BLF 2057-12-BLF 2057-13-BLF 2057-25-BLF 2057-30-BLF 2057-35-BLF
2057-40-BLF 2057-47-BLF 2057-07-BT1LF 2057-09-BT1LF 2057-12-BT1LF 2057-13-BT1LF 2057-23-BT1LF 2057-
25-BT1LF 2057-30-BT1LF 2057-35-BT1LF 2057-40-BT1LF 2057-47-BT1LF 2057-15-BLF