component

B57621C5472J062

Public Made by Adom

by adom

TDK NTC Thermistors, 1206. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.

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B57621C5472J062

TDK · NTC Thermistors · 1206

B57621C5472J062 from TDK, in a 1206. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 1 passive Terminal 1 of an unpolarised resistor; either orientation.
2 2 passive Terminal 2 of an unpolarised resistor; either orientation.

Key specifications

Parameter Value
Manufacturer TDK
Package 1206
Category Sensors
Pins 2

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Operating temperature range Top -55 125 °C 2
Resistance tolerance (J = ±5%) ∆RR/RR -5 5 % Ordering code suffix J = ±5% 2
B value tolerance -3 3 % For 4.7 k type, R/T characteristic 1309 2
Maximum power at 25 °C on PCB P25 300 mW at 25 °C, on PCB 2
Resistance drift after storage in dry heat ∆R25/R25 6 % Storage at upper category temperature T: (125 ±2) °C, t: 1000 h (footnote 1 exception for B57621C5472+062) 3
Resistance drift after damp heat, steady state ∆R25/R25 3 % Temperature of air (40 ±2) °C, relative humidity (93 +2/3)%, duration 21 days 3
Resistance drift after rapid temperature cycling ∆R25/R25 3 % Lower test temperature 55 °C, upper test temperature 125 °C, 10 cycles 3
Resistance drift after endurance ∆R25/R25 5 % Pmax 300 mW, T (65 ±2) °C, t: 1000 h 3
Resistance drift after soldering ∆R25/R25 5 % Reflow soldering profile or wave soldering profile 3
B value B25/50 B25/50 3430 K 2
B value B25/85 B25/85 3500 K 2
B value B25/100 B25/100 3520 K Characteristic 1309 2
Temperature coefficient α at 25 °C α 3.8 %/K R/T characteristic 1309 at 25 °C 4
Rated temperature TR 25 °C 2
Dissipation factor (on PCB) δth 5 mW/K Depends on mounting situation (on PCB) 2
Thermal cooling time constant (on PCB) τc 10 s Depends on mounting situation (on PCB) 2
Heat capacity Cth 50 mJ/K Depends on mounting situation 2

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts nickel SMD NTCs with AgPd termination are not approved for lead-free soldering. Nickel barrier termination 12

CAD (KiCad official)

  • Symbol: B57621C5472J062
  • Footprint: Resistor_SMD:R_1206_3216Metric
  • 3D model: 1206 (KiCad packages3D, STEP)
  • 3D model files: b57621c5472j062-etched.step / b57621c5472j062-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); b57621c5472j062.step / b57621c5472j062.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: TDK datasheet (25 pp, sha256 0dc20b1ef84343a1, retrieved 2026-10-21, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins, primary two-terminal convention (convention), consensus off (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF