Transient Protectors for Computer Communications

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Electrical Specification

	ESP LA-5/25	ESP LA-25/25	ESP LA-9/9	ESP LB-9/9	ESP LA-15/15	ESP LB-15/15
Nominal voltage (note 1)	23.1V	23.1V	23.1V	5.8V	15.3V	6.4V
Maximum working voltage (note 2)	25.7V	25.7V	25.7V	6.4V	17.1V	7.13V
Capacitance	<500pf	<500pf	<500pf	<2000pf	<50pf	<50pf
Current rating	300mA	300mA	300mA	300mA	300mA	300mA
In-line resistance (ohms)	approx zero	approx zero	approx zero	approx zero	approx zero	approx zero

1 Nominal voltage (DC or AC peak) measured at 5µA (ESP LA-5/25, ESP LA-9/9, ESP LA-25/25, ESP LA-15/15), 0.5mA (ESP LB-15/15) and 1mA (ESP LB-9/9).
2 Maximum working voltage (DC or AC peak) measured at 1mA leakage (ESP LA-5/25, ESP LA-9/9, ESP LA-25/25, ESP LA-15/15) and 10mA (ESP LB-15/15 and ESP LB-9/9)

Transient Specification

	ESP LA-5/25	ESP LA-25/25	ESP LA-9/9	ESP LB-9/9	ESP LA-15/15	ESP LB-15/15
Let-through voltage (note 1) 1.5kV, 10/700µs test to: BS 6651:1999 Appendix C, Cat C-Low ITU (formely CCITT) IX K17	37.5V	37.5V	37.5V	10.5V	28.5V	14.6V
Protection provided	Pins 1,2,3, 7 and 20 to earth/shell (note 2)	Pins 1 through 25 to earth/shell (note 2)	Pins 1 through 9 to earth/shell (note 2)	Pins 1 through 9 to earth/shell (note 2)	Pins 1 through 15 to earth and each other (note 2)	Pins 1 through 15 to earth and each other (note 2)
Maximum surge current (note 3)	200A	200A	200A	300A	350A	700A

1 The maximum transient voltage let-through the protector throughout the test (+/-10%). Response time <10ns.
2 Pin 1 connected to earth/shell.
3 Tested with 8/20µs waveshape to ITU (formely CCITT), BS 6651:1999 Appendix C.

Mechanical Specification

	ESP LA-5/25	ESP LA-25/25	ESP LA-9/9	ESP LB-9/9	ESP LA-15/15	ESP LB-15/15
Temperature range	-25°C to +70°C	-25°C to +70°C	-25°C to +70°C	-25°C to +70°C	-25°C to +70°C	-25°C to +70°C
Connection type	DB-25 male-female	DB-25 male-female	DB-9 male-female	DB-9 male-female	DB-15 male-female	DB-15 male-female
Earth connection	Shell or 150mm earth lead (supplied)	Shell or 150mm earth lead (supplied)	Shell or 150mm earth lead (supplied)	Shell or 150mm earth lead (supplied)	Shell or 150mm earth lead (supplied)	Shell or 150mm earth lead (supplied)
Weight unit packaged	50g 70g	50g 70g	40g 50g	40g 50g	50g 60g	50g 60g
Dimensions ESP LA LB Brochure

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