128

Features

Applications

● Quick response for surge.

● High impulse current capacity.

● It can withstand alternating current.

● Excellent insulation resistance and small

capacitance.

● Recommendation of ITU-T conformity.

● Telephone, PBX, Wireless base station, Optical

transmission equipments, CATV transmission

equipments, Fire alarm systems and Home

security systems.

● Dimensions

Unit: mm

UL

:UL497B

:UL1449

E139599

E332107

Safety Standard

File No.

25min.

25min.

φ 8.0±0.25

A±0.2

Model Number

R28-

-BHL

R28-

-BJL

R28-

-BKL

A

5.7

6.05

7.5

Electrical Specifications (High Voltage Type)

R28-801-BHL

R28-102-BHL

R28-152-BHL

R28-242-BJL

R28-302-BKL

R28-362-BKL

R28-402-BKL

R28-452-BKL

800V±20%

1,000V±20%

1,500V±20%

2,400V±20%

3,000V±20%

3,600V±20%

4,000V±20%

4,500V±20%

Model Number

-

AC1,250V 3s

AC1,500V 60s

AC1,800V 3s

AC2,000V 60s

(Conforms to ITU-T)

DC Sparkover

Voltage

500V/s

(V)

Impulse

Discharge

Current

8/20μs (A)

10,000

Impulse

Life Test

8/20μs

1,000A (times)

300

1.5

Insulation

Resistance

min. (MΩ)

Capacitance

max. (pF)

Withstand

Voltage test

Electrical Specifications (Low Voltage Type)

R28-900-BHL

R28-151-BHL

R28-231-BHL

R28-251-BHL

R28-301-BHL

R28-351-BHL

R28-401-BHL

R28-471-BHL

R28-601-BHL

90V±20%

150V±20%

230V±20%

250V±20%

300V±20%

350V±20%

400V±20%

470V±20%

600V±20%

450

500

600

650

750

800

900

1,300

Model Number

DC Sparkover

Voltage

100V/s~2,000V/s

(V)

Safety

Standard

Impulse

Sparkover

Voltage

100V/μs (V)

Impulse

Discharge

Current

8/20ms (A)

10,000

Alternating

Discharge Current

50Hz, 1s

10 times (A)

10

Impulse

Life Test

10/1,000μs

100A (times)

300

1.5

Capacitance

max. (pF)

Insulation

Resistance

min. (MΩ)

-

-

-

-

Ο

Ο

Ο

Ο

Ο

Ο

Ο

Ο

Ο

UL

497B

UL

1449

Safety

Standard

UL

1449

SURGE PROTECTIVE DEVICES

Length

Type of wire

R2 8

5

31

H

BL

Series Name

DC sparkover

Voltage

Type of taping

H

J

K

O

5.7mm

6.05mm

7.5mm

10.0mm

L

None

With lead

Without lead

R28

R38

2 electrode arrester

3 electrode arrester

*¹ Rated voltage AC125V: Approved if it is connected to UL approved varistor (V1.0mA≥270V, D≥φ 14mm).

*² Rated voltage AC250V: Approved if it is connected to UL approved varistor (V1.0mA≥470V, D≥φ 14mm).