Protekdevices 420E260, 420E250, 420E236, 420E228, 420E225 Datasheet

05053

420E212

thru

. . . engineered solutions for the transient environment

DUAL 4-20mA CONTROL LOOP PROTECTOR

APPLICATIONS

✔ Security Alarm Systems
✔ Industrial Control & Monitoring Systems
✔ Remote Tech Site Station
✔ Process Control Loops

IEC COMPATIBILITY (EN61000-4)

✔ 61000-4-2 (ESD): Air - 15kV, Contact - 8kV
✔ 61000-4-4 (EFT): 40A - 5/50ns
✔ 61000-4-5 (Surge): 8/20µs - 95A, Level 4(Line-Gnd) & 48A, Level 4(Line-Line)

FEATURES

✔ Designed for 4-20mA Current Loops
✔ Automatic Reset - Will Not Interrupt Service
✔ Permanent Two-Stage Line Pair Protection
✔ Line-to-Ground (Common) & Line-to-Line (Differential) Protection
✔ Subnanosecond Response Time
✔ Effective Against Lightning, Inductive Switching & ESD

420E260

420E PACKAGE

MECHANICAL CHARACTERISTICS

✔ Weight 50 grams (Approximate)
✔ Flammability Rating UL 94V-0
✔ Device Marking: Part Number, Date Code, Logo, and Terminal Designations

DESCRIPTION

The 420E2 series of protection is a two stage transient voltage protector providing primary and secondary protection against light­ning, inductive switching and electrostatic discharge (ESD) transient threats. The first stage diverts the transient current through the
ground terminal return path and the second stage clamps the voltage to a safe level without interruption of service.

The 420E2 series is designed to protect 4-20mA analog control loops from differential and common mode transients. Terminals 1 and
2 are designed as the line pairs for both the line and equipment side of the protector. A transient voltage suppressor is internally
connected across each line pair for differential mode protection. Each line pair is referenced to ground.

This product can also be used on telephone, signal/data lines, security, timing and control interface circuits.

05053.R2 7/02

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www.protekdevices.com

DEVICE CHARACTERISTICS

MAXIMUM RA TINGS @ 25°C Unless Otherwise Specified

PARAMETER
Operating Line Current

Operating Temperature
Storage Temper ature
Transient Source Voltage

Transient Current (8/20µs)

ELECTRICAL CHARACTERISTICS @ 25ºC Ambient T emperature

PROTEK

PART

NUMBER

420E212
420E225
420E228
420E236
420E250
420E260

MAXIMUM

OPERATING

LINE VOLTAGE

V

OP

± VOLTS

12.0

25.0

28.0

36.0

50.0

60.0

MAXIMUM

LEAKAGE

CURRENT

@ V

OP

I

D

µA

5.0

5.0

5.0

5.0

5.0

5.0

MAXIMUM

CLAMPING

VOLTAG E

(8/20µs)

@2,000A

V

C

VOLTS

22
44
46
60
80
95

420E212

420E260

VALUE

100

-55°C to 100°C

-55°C to 100°C
6kV

10kA per line

MAXIMUM

CAPACITANCE

@ 0 V, 1 MHz

C

pF

6000
3000
2800
1500
1200
1000

MAXIMUM

LINE THRUPUT

RESISTANCE

thru

UNITS

mA

°C
°C

V
A

R

OHMS

12
12
12
12
12

12

INSTALLATION INSTRUCTIONS

There are two (2) terminals on the LINE SIDE and three (3) wires on the EQUIPMENT SIDE of this surge protection device (SPD). The Ground
lead is considered ground for both the input terminal and the equipment wire connections. For the best results, the ground wire should be con­nected to a low impedance ground or the green wire AC power ground. It is recommended that a #14 stranded wire be used for this connection.

Field (current) loops or incoming signal/data lines are to be cut or disconnected from the equipment to insert the 420E2 SPD. The LINE SIDE
terminals of the protector are to be connected to the field loop wires. The EQUIPMENT SIDE of the protector is connected to the equipment/
receiver/controller, etc. The location of the protector should be as close to the equipment requiring protection.

420E2 CASE OUTLINE

1.40” MAX

(35.56 mm)

1.20” MAX

(30.48 mm)

LINE
SIDE

COPYRIGHT © ProTek Devices 2001

SPECIFICATIONS: ProTek reserves the right to change the electrical and or mechanical characteristics described herein without notice (except
JEDEC).
DESIGN CHANGES: ProT ek reserves the right to discontinue product lines without notice, and that the final judgement concerning selection and
specifications is the buyer’s and that in furnishing engineering and technical assistance, ProT ek assumes no responsibility with respect to the
selection or specifications of such products.

2.50” MAX
(63.5 mm)

EQUIPMENT

SIDE

GND

1

0.675” MAX

2

(17.15 mm)

ProTek Devices
2929 South Fair Lane, Tempe, AZ 85282
Tel: [phone] Fax: [phone]

E-Mail: [e-mail]
Web Site: www.protekdevices.com

GND

2
1

www.protekdevices.com205053.R2 7/02