R28 SERIES
SURGE PROTECTIVE DEVICES
Features
● Quick response for surge.
● High impulse current capacity.
● It can withstand alternating current.
● Excellent insulation resistance and small
capacitance.
● Recommendation of ITU-T conformity.
Safety Standard
:UL497B
:UL1449
UL
File No.
E139599
E332107
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
φ 1.0 -0.1
+0.2
DC sparkover
Voltage
Unit: mm
Model Number
R28-BHL
R28-BJL
R28-BKL
B H
351
R28
R38
Type of wire
Type of taping
2 electrode arrester
B
UL UL
497B 1449
*1
*1
*1
*1
*1
*2
Ο
Ο
Ο
Ο
Ο
Ο
Ο
Ο
Ο
Model Number
DC Sparkover
Voltage
100V/s~2,000V/s
(V)
Impulse
Sparkover
Voltage
100V/μs (V)
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%
Bulk
Length
3 electrode arrester
Electrical Specifications (Low Voltage Type)
Safety
Standard
With lead
None Without lead
L
35X10¹=350V
Series Name
A
5.7
6.05
7.5
L
H
J
K
O
5.7mm
6.05mm
7.5mm
10.0mm
(Conforms to ITU-T)
450
500
Impulse
Alternating
Impulse
Insulation
Discharge Discharge Current
Life Test
Resistance
Current
50Hz, 1s
10/1,000μs
min. (MΩ)
8/20ms (A)
10 times (A)
100A (times)
Capacitance
max. (pF)
600
650
750
800
900
1,300
10,000
10
104
300
1.5
Electrical Specifications (High Voltage Type)
Safety
Standard
UL
1449
*1
*2
*1
*2
*1
*2
*1
*2
*1
*2
*1
*2
*1
*2
*1
*2
Model Number
DC Sparkover
Voltage
500V/s
(V)
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%
Impulse
Discharge
Current
8/20μs (A)
Impulse
Life Test
8/20μs
1,000A (times)
Insulation
Resistance
min. (MΩ)
Capacitance
max. (pF)
Withstand
Voltage test
10,000
300
104
1.5
AC1,250V 3s
AC1,500V 60s
AC1,800V 3s
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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