R28 SERIES
SURGE PROTECTIVE DEVICES
Features
● Quick response for surge.
Safety Standard
:UL497B
File No.
E139599
● High impulse current capacity.
● It can withstand alternating current.
● Excellent insulation resistance and small
capacitance.
UL
:UL1449
E332107
● Recommendation of ITU-T conformity.
Applications
● Telephone, PBX, Wireless base station, Optical
transmission equipments, CATV transmission
equipments, Fire alarm systems and Home
security systems.
● Dimensions
25min.
A±0.2
25min.
φ 8.0±0.25
● Model numbering system
R 2 8
3 5 1
DC sparkover
B H L
Type of wire
Voltage
Unit: mm
With lead
35X10¹=350V
L
None
351
Without lead
Series Name
Type of taping
Model Number
R28--BHL
R28--BJL
R28--BKL
A
2 electrode arrester
3 electrode arrester
Bulk
Length
R28
R38
B
5.7mm
H
J
K
O
5.7
6.05
7.5
6.05mm
7.5mm
10.0mm
Electrical Specifications (Low Voltage Type)
(Conforms to ITU-T)
Safety
Standard
DC Sparkover
Voltage
100V/s~2,000V/s
(V)
Impulse
Sparkover
Voltage
Impulse
Discharge Discharge Current
Current
8/20ms (A)
Alternating
Impulse
Life Test
10/1,000μs
Insulation
Capacitance
Resistance
max. (pF)
Model Number
50Hz, 1s
10 times (A)
UL UL
497B 1449
min. (Mꢀ)
100V/μs (V)
100A (times)
Ο
Ο
Ο
Ο
Ο
Ο
Ο
Ο
Ο
-
-
-
-
*
{
*
{
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
1
1
1
1
10,000
10
300
104
1.5
650
750
*
{
*
{
800
900
1
2
*
{
1,300
*
Electrical Specifications (High Voltage Type)
Safety
Standard
DC Sparkover
Voltage
500V/s
Impulse
Discharge
Current
Impulse
Life Test
8/20μs
Insulation
Resistance
min. (MΩ)
Capacitance
max. (pF)
Withstand
Voltage test
Model Number
UL
1449
(V)
8/20μs (A)
1,000A (times)
1
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
{
{
{
{
{
{
{
{
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%
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
-
AC1,250V 3s
AC1,500V 60s
AC1,800V 3s
10,000
300
104
1.5
AC2,000V 60s
*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).
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