component
B57621C5472J062
Public Made by Adomby 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.
Generated by kicad-footprint-generator · KiCad file format 20260206
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| b57621c5472j062-etched.step | 9h ago |
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| README.md | 9h ago |
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);b57621c5472j062.step/b57621c5472j062.glbare 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, primarytwo-terminal convention(convention), consensusoff(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).