PTC thermistors as
inrush current limiters
Leaded disks, uncoated
Series/Type: B5975*/ B5977*
Date: April 2014
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.Inrush current limiters
Leaded disks, uncoated
Applications Dimensional drawing
Inrush current limiter (charging resistor) for
smoothing and DC link capacitors
To replace high-power fixed resistors for
capacitor charging
Features
Self-protecting in case of malfunction of
short-circuit relay or internal short circuit of
capacitor
Inrush current limiters are not damaged
when directly connected to V even without
max
additional current limitation
Dimensions in mm
Marking: Type, manufacturer's logo,
reference temperature in C and date code
Type w h th
max max max
YYWW
B750 12.5 16.5 5.0
UL approval to UL 1434 with V = 420 V
max
B751 12.5 16.5 7.0
and V = 380 V (file number E69802)
R
B752 12.5 16.5 7.0
VDE approval for selected types
B753 12.5 16.5 7.0
(licence number 104843 E)
B754 12.5 16.5 7.0
RoHS-compatible
B755 12.5 16.5 7.0
B770 8.5 12.0 7.0
B771 8.5 12.0 7.0
Delivery mode
B772 8.5 12.0 7.0
Cardboard strips
B773 8.5 12.0 7.0
General technical data
Operating cycles at V (charging of capacitor) N > 50000 cycles
max c
Switching cycles at V (failure mode) N > 10 cycles
max f
Operating temperature range (V = 0) T 40/+125 C
op
Operating temperature range (V = V ) T 20/+85 C
max op
Electrical specifications and ordering codes
V V R R T C
Type max link,max R R ref th th Approvals Ordering code
(typ.)
V AC V DC % C J/K s
B750 260 360 25 25 115 1.0 100 X X B59750B0120A070
B751 260 360 50 25 115 1.4 120 X X B59751B0120A070
B752 260 360 80 25 115 1.4 120 X X B59752B0120A070
B753 440 620 120 25 115 1.4 120 X X B59753B0120A070
B754 440 620 150 25 115 1.4 120 X X B59754B0120A070
B755 560 800 500 25 110 1.4 120 X X B59755B0115A070
Please read Cautions and warnings and Page 2 of 12
Important notes at the end of this document.