Brochure

Frequently Asked Questions
www.vishay.com
Vishay
Revision: 16-Apr-15
3
Document Number: 29111
For technical questions, contact: [e-mail]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
ARE THERE SURFACE-MOUNT EQUIVALENTS FOR ALL THROUGH-HOLE (LEADED) THERMISTORS?
•Not for all the R
25
values. Vishay offers equivalents for standard R
25
values (10K, 100K with B
25/85
= 3435K and 3977K).
Consult the R/T computation programs for the SMD series and choose the low, medium, or high B-values. The program will
give you the appropriate part number.
DOES VISHAY TRIM ITS NTC THERMISTORS FOR HIGHER-PRECISION PERFORMANCE?
• Whenever possible, Vishay will not trim the parts. The stability and homogeneity of the NTC ceramic material, together with
the precise dimensioning of the NTC chip, allow us to achieve low tolerance parts without trimming. We use a trimming
process only for some very tight tolerances in point-matched or curve-tracked interchangeable parts. In such cases, we only
trim off a small percentage of the chip area to achieve the desired value and accuracy.
I NEED THE FASTEST SENSOR EVER FOR MY APPLICATION, OR THE SMALLEST AVAILABLE.
• When speaking about through hole components, Vishay presents its NTCLE305 series with minimal outside head dimension.
CAN I DEDUCE PRODUCT INFORMATION FROM THE SAP PART NUMBER?
• Yes look in part number order information, and choose your execution (Leaded: www.vishay.com/doc?33032, SMD:
www.vishay.com/doc?33034, or Assemblies: www.vishay.com/doc?33036).
I NEED THE UTMOST STABILITY AND PRECISION FOR MY APPLICATION. WHICH COMPONENT
SHOULD I CHOOSE?
• It all depends on the type of mechanical executions that you want to use.
• If SMD is needed, then use NTCS0805E3104SMT, NTCS0603E3124SMTor NTCS0402E3224SMT.
(www.vishay.com/doc?29151
)
• If a leaded component is required, then we suggest NTCLE203E3103SB0.
(www.vishay.com/doc?29118)
WHICH DEVICE SHOULD I CHOOSE IF LOW PRICE IS MORE IMPORTANT THAN STABILITY OR
PRECISION?
• In this case choose a ± 5 % tolerance part with copper leads like the NTCL100E3103JB0. It’s a low priced component with
fair precision and good stability.
• For an SMD implementation, a part like the NTCS0805E3103JMT (a 10 k ± 5 % device in the 0805 package) will do the job
perfectly.