NTC thermistors for inrush current limiting

B57211P0***M3*1

Inrush Current Limiters (ICLs)

P11/**/M3*1

PPD VAR PD

2021-04-22

Please read Cautions and warnings and

Page 2 of 14

Important notes at the end of this document.

Applications



Inrush current limiting, e.g. in switch-mode power supplies, soft-start motors

Features



Leaded and coated NTC thermistors



Tinned copper wire, kinked



Coating material flame retardant to UL 94 V-0



Component marking includes the manufacturer’s logo, resistance value and data code



Highly stable electrical characteristics

Approvals



UL 1434 (file number E338926)



IEC



VDE



CQC

Options



Resistance tolerance <20% and alternative lead configurations available on request

Delivery mode



Bulk (standard), cardboard tape on reel or Ammo pack

General technical data

Climatic category

(IEC 60068-1)

40/170/21

Max. power

(at 25 °C)

Pmax

3.0

W

Resistance tolerance

∆

RR/RR

±

20

%

Rated temperature

TR

25

°C

Dissipation factor

(in air)

δth

approx. 13

mW/K

Thermal cooling time constant (in air)

τth

approx. 70

s

Heat capacity

Cth

approx. 910

mJ/K