Slide 1: Multilayer SMD NTC Thermistors
Multilayer SMD NTC Thermistors The preferred solution for temperature measurement and compensation TDK Electronics AG September 03, 2025
Slide 2: SMD NTC thermistors
SMD NTC thermistors NTC (Negative Temperature Coefficient) thermistors are Ceramic thermally sensitive resistors that show a decrease in resistance as temperature increases. Terminal electrode Thanks to their excellent long-term stability, sensitivity, and (Sn) accuracy, NTC thermistors are the pref
Slide 3: Resistance as a function of temperature
SMD NTC thermistors Resistance as a function of temperature The following equations describe with sufficient accuracy the resistance dependance on temperature: 𝑇 𝑇 𝑅 𝑇 𝑇 𝑅 1 𝑑𝑅 RT Resistance value in Ω at ambient temperature 𝑅 =𝑅 𝑒 𝐵= ln = ln 𝛼= 𝑇 −𝑇 𝑅 𝑇−𝑇 𝑅 𝑅 𝑑𝑇 T Ambient…
Slide 4: Temperature accuracy
SMD NTC thermistors Temperature accuracy The R tolerance at 25°C and the B value tolerance define the tolerance of the thermistor over the temperature range 6.0 5.0 R25 Rtol B25/100 Btol T @ T @ % K % 25 °C 100 °C 4.0 3.0 10 k 1% 3455 1% ±0.3 °C ±1.3 °C 2.0 1.0 10 k 5% 3455 1% ±1.3 °C ±2.9 °C…
Slide 5: Ordering codes
SMD NTC thermistors Ordering codes B57 3 32 V5 103 F 3 60 Dimensional drawings NTC thermistor Dimensions (mm) Case sizes: Case size 2 ≙ EIA chip size 0402 (1005) w EIA / mm l w h k 3 ≙ EIA chip size 0603 (1608) 0402 / 1.0 ±0.1 0.5 ±0.05 0.6 max. 0.25 ±0.15 4 ≙ EIA chip size 0805 (2012) 1005 620 ≙ EI
Slide 6: Standard series for non-automotive applications
SMD NTC thermistors Standard series for non-automotive applications R25 [k] DRR/RR[%] B25/50 [K] B25/85 [K] B25/100 [K] Ordering code Features 4.7 ±5 3940 3980 4000 ±3% B57221V2472J060 Accurate temperature sensing from -55°C to +125 °C EIA CASE SIZE 10 ±0.5, ±1, ±3, ±5 3380 3435 3455 ±1% B57230V2
Slide 7: Standard series for non-automotive applications
SMD NTC thermistors Standard series for non-automotive applications R25 [k] DRR/RR[%] B25/50 [K] B25/85 [K] B25/100 [K] Ordering code Features 1.0 ±3, ±5 3940 3980 4000 ±3% B57421V2102+062 Accurate temperature sensing from -55°C to +125 °C 1.5 ±3, ±5 3940 3980 4000 ±3% B57421V2152+062 2.2 ±3, ±5
Slide 8: Multilayer: SMD NTC Automotive portfolio
Multilayer: SMD NTC Automotive portfolio R25 [k] DRR/RR[%] B25/50 [K] B25/85 [K] B25/100 [K] Ordering code R25 DRR/RR B25/50 B25/85 B25/100 Ordering code 4.7 3940 3980 4000 ±3% [k] [%] [K] [K] [K] ±5 B57251V5472J060 EIA CASE 10 ±0.5, ±1, ±3, ±5 3380 3435 3455 ±1% B57232V5103+360 4.7 k ±3, ±5 3590
Slide 9: Overview series with tight tolerances
SMD NTC thermistors Overview series with tight tolerances Standard series for non-automotive applications EIA R25 ΔRR B25/50 B25/85 B25/100 ΔB25/100 Ordering code case size kΩ % K K K % 402 10 ±0.5 (D), ±1 (F), ±3 (H), ±5 (J) 3380 3435 3455 ±1 B57230V2103+260 603 10 ±0,5 (D) 3380 3435 3455 ±0.7 B573
Slide 10: SMD NTC thermistors with soft termination
SMD NTC thermistors with soft termination Advantages Portfolio Robustness verification High resistance to mechanical stress by resin layers R25 DRR/RR B25/50 B25/85 B25/100 EIA Ordering code Enhanced mechanical stress robustness for special substrate [k] [%] [K] [K] [K] combinations Test condit
Slide 11: SMD NTC thermistors with high temperature up to 175°C
SMD NTC thermistors with high temperature up to 175°C Advantages Portfolio Multilayer SMD NTC thermistor with nickel barrier termination (AgNiSn) R25 RR/RR B25/50 B25/85 B25/100 EIA Ordering code B values specified between 25 °C and 100 °C for highest accuracy at typical [k] [%] [K] [K] [K] wo
Slide 12: www.tdk-electronics.tdk.com
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