
Series YB2
24mm Square Panel Seal Pushbuttons
BRIGHT & SUPER BRIGHT LEDS
The electrical specifications shown are determined at a basic temperature of 25°C. LED circuit is isolated and
requires an external power source. If the source voltage exceeds the rated voltage, a ballast resistor is required.
Base of AT634 and AT636 is Black for 5V, Light Blue for 12V and Gray for 24V.
Electrical Specifications for Bright LED without Resistor
Bright
AT628
Colors
Available:
5C
Red
5D
Amber
No Code
No Resistor
Unit
LED Colors
Red
Amber
Forward Peak Current
Continuous Forward Current
I FM
I F
40
26
40
26
mA
mA
T-1 Bi-pin
Forward Voltage
Reverse Peak Voltage
V F
V RM
1.9
4
2.0
4
V
V
(+)
(-)
Current Reduction Rate Above 25°C
?I F
0.50
mA/°C
Ambient Temperature Range
–25 ~ +50
°C
Electrical Specifications for Bright Red & Amber LED with Resistor
Bright
AT634
Colors
Available:
5C
Red
5D
Amber
05
12
24
Unit
Forward Peak Current
Continuous Forward Current
Forward Voltage
I FM
I F
V F
—
25
5
—
20
12
—
10
24
mA
mA
V
T-1 1 ? 4 Bi-pin
Reverse Peak Voltage
Current Reduction Rate Above 25°C
V RM
?I F
4
—
8
—
16
—
V
mA/°C
Ambient Temperature Range
–25 ~ +50
°C
24-volt,
AT634
5-volt,
2-element
with Resistor
(+)
(-)
AT634
12-volt,
4-element
with Resistor
(+)
(-)
AT634
(+)
4-element
with Resistor
(-)
Electrical Specifications for Bright Green LED with Resistor
Bright
AT636
Colors
Available:
ATTENTION
ELECTROSTATIC
SENSITIVE DEVICES
5F
Green
05
12
24
Unit
Forward Peak Current
I FM
—
—
—
mA
T-1 1 ? 4 Bi-pin
Continuous Forward Current
I F
11
9.5
8.7
mA
(+)
(+)
5V
(-)
(-)
Forward Voltage
Reverse Peak Voltage
Current Reduction Rate Above 25°C
V F
V RM
?I F
5
5
—
12
5
—
24
5
—
V
V
mA/°C
12V & 24V
Ambient Temperature Range
–25 ~ +50
°C
Electrical Specifications for Super Bright LED
Super Bright
AT625G Blue
AT631B White
AT632F Green
ATTENTION
ELECTROSTATIC
SENSITIVE DEVICES
Forward Peak Current
(+)
(-)
Colors:
I FM
6B
White
30
6F
Green
30
6G
Blue
30
Unit
mA
T-1 Bi-pin
Continuous Forward Current
Forward Voltage
Reverse Peak Voltage
Current Reduction Rate Above 25°C
I F
V F
V RM
?I F
20
3.6
5
20
3.5
5
0.50
20
3.6
5
mA
V
V
mA/°C
6
Ambient Temperature Range
www.nkk.com
–25 ~ +50
°C