Product News: Controls & Controllers

SMD NTC Thermistors offer stability with low R25 value variation.

Press Release Summary:

SMD NTC Thermistors offer stability with low R25 value variation.

Jan 30, 2014 - Providing precise measurements, NTCS....E3...SMT series experiences ±0.5% max variation in initial electrical resistance values at +25°C (R25) after 10,000 hr of operation over the full -40 to +125°C range. Non-standard R25 values are adapted to resistivity of thermistors' stable ceramic material and case dimensions, preserving original electrical properties throughout lifetime. Supplied in 0402, 0603, and 0805 case sizes, RoHS-compliant thermistors offer R25 values from 100–210 kΩ.

Original Press Release

New Vishay SMD NTC Thermistors Offer Enhanced Stability with Low ± 0.5 % Max. Variation of R25 Values

Press release date: Jan 29, 2014

Devices Provide High R25 Values From 100 kΩ to 210 kΩ and Temperature Range to +125 °C in 0402, 0603, and 0805 Case Sizes

MALVERN, Pa. – Vishay Intertechnology, Inc. (NYSE: VSH) today introduced a new series of SMD NTC thermistors with enhanced stability for temperature sensing and compensation circuits. Providing precise measurements over a wide temperature range of -40 °C to +125 °C, NTCS....E3...SMT thermistors experience an ultra-low ± 0.5 % maximum variation in their initial electrical resistance values at +25 °C (R25) after 10,000 hours of operation over the full temperature range.

Most SMD NTC thermistors with low initial electrical tolerances experience a change in their electrical properties after soldering, which has a direct impact on the accuracy of their temperature measurements. Devices in the Vishay BCcomponents NTCS....E3...SMT series, however, feature non-standard R25 values that are adapted to the resistivity of the thermistors' stable ceramic material and case dimensions. This preserves the devices' original electrical properties throughout their lifetime for increased accuracy.

Optimized for heat counters, body thermometers, and other medical applications, the thermistors released today offer one R25 value per case in the 0402, 0603, and 0805 case sizes. The devices' high R25 values from 100 kΩ to 210 kΩ reduce self-heating effects, which could result in false temperature readings.

Featuring an SMD construction with nickel barrier and pure tin, the RoHS-compliant NTCS....E3...SMT series is ideal for wave and reflow soldering. The devices are delivered on punched paper tape on reels in packages of 4,000 units (for case 0603 and 0805) and 10,000 units (for case 0402).
Device Specification Table:
Part # NTCS0402E3214SMT NTCS0603E3124SMT NTCS0805E3104SMT
Case size 0402 0603 0805
R25 value 210 kΩ 122 kΩ 100 kΩ
R25 tolerance 1 % 1 % 1 %
B25/85 value 3590 K 3590 K 3590 K
B25/85 tolerance ± 1 % ± 1 % ± 1 %
Max. power dissipation 70 mW 120 mW 210 mW

Samples and production quantities of the new NTC thermistors are available now, with lead times of six weeks for larger orders. Pricing for U.S. delivery starts at $0.92 per piece in 1,000-piece quantities.

Vishay Intertechnology, Inc., a Fortune 1000 Company listed on the NYSE (VSH), is one of the world's largest manufacturers of discrete semiconductors (diodes, MOSFETs, and infrared optoelectronics) and passive electronic components (resistors, inductors, and capacitors). These components are used in virtually all types of electronic devices and equipment, in the industrial, computing, automotive, consumer, telecommunications, military, aerospace, power supplies, and medical markets. Vishay's product innovations, successful acquisition strategy, and "one-stop shop" service have made it a global industry leader. Vishay can be found on the Internet at

Vishay Contact:
Andrew Post
Senior Manager
Global Communications
Vishay Intertechnology, Inc.
Telephone: 1 610 251-5287
Fax: 1 610 889-9429