PTC thermistors for
overcurrent protection
Rods, uncoated, 500 V
Series/Type: B59404/ B59406
Date: February 2012
EPCOS AG 2015. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
EPCOS AG is a TDK Group Company.Overcurrent protection
Rods, uncoated, 500 V B404, B406
Applications Dimensional drawing
Overcurrent protection
Short circuit protection
For high operating voltages
Features
Leaded rod-type thermistor
Low mounting height
RoHS-compatible
Delivery mode
Bulk
Dimensions (mm)
Type a l
max
B404 3.5 1.5 12.5 1 17
B406 3.5 1.5 12.5 1 17
General technical data
Max. operating voltage for B404 and B406 (T = 60 C) V 550 V DC or V AC
A max
Rated voltage for B404 and B406 V 500 V DC or V AC
R
Switching cycles N 100
Reference temperature (typ.) T 60 C
ref
Operating temperature range (V = 0) T 40/+125 C
op
Operating temperature range (V = V ) T 0/+60 C
max op
Electrical specifications and ordering codes
I I I I R R R
Type R S Smax r R R min Ordering code
(V = V ) (typ.)
max
(V = V )
max
mA mA A mA %
Rated voltage = 500 V DC or V AC
B404 4 9 0.4 1.0 3500 16 2880 B59404B0060A040
B406 2.5 6.5 0.3 1.0 5500 28 3800 B59406B0060A040
Please read Cautions and war nings and Page 2 of 9
Impor tant notes at the end of this document.