Littelfuse Inc. 的 SM Series 规格书

1littelfuse.com
© 2018 Littelfuse, Inc. Revised: February 26, 2018
Specifications are subject to change without notice.
Description
Littelfuse LL-34 “MiniMELF” style glass encapsulated surface
mount thermistors are manufactured using super stable NTC chips
which are hermetically sealed in a glass package. The result is a
device which exhibits excellent long-term reliability and stability
even when subjected to severe environmental or thermal
conditions. Their uniform dimensions make them especially
suitable for use with automatic insertion equipment.
Dimensions
A B C
0.135”
± 0.012”
0.019”
± 0.005”
0.060”
± 0.005”
Dimensions shown in inches.
LL 34 MiniMELF SM
MELF Style Thermistor
Surface Mount Thermistors
Features
• High temperature
capability to +220°C
• Surface mountable
• Hermetically sealed
glass package
• Low cost
• Excellent long-term
stability
Options
• Non-standard
resistance values
and tolerances
• Point matched at
specified temperatures
• Tape and Reel
Packaging
GLASS
BODY
0.060"
0.005"
0.135"
0.012"
0.019"
0.005"
TINNED
DUMET
CONTACT
TABS
GLASS
BODY
0.060"
± 0.005"
0.135"
± 0.012"
0.019"
± 0.005"
TINNED
DUMET
CONTACT
TABS
A
C B
A B C
Part Numbering System
Note: Not all combinations of Part Number codes are available. Contact Littelfuse for details.
SM 10 2 B 1 K
No Significance
Multiplier, power of 10
Ex. 102 = 10 Ω x 102 = 1,000 Ω
Resistance @ 25ºC
Base Value
R-T Curve
Series Resistance Tolerance
F = ±1%
K = ±10%
% Liltelluse" mum/Wm \ Answelsflalweved
2littelfuse.com
© 2018 Littelfuse, Inc. Revised: February 26, 2018
Specifications are subject to change without notice.
Specifications
Part
Number
Resistance
Ohms
@25°C
*Resistance
Tol. ± %
@ 25°C
R-T
Curve
Temperature
Coefficient
(%/°C) @ 25°C
Beta (K)
0-50°C
Dissipation
Constant,
Nominal
(mW/°C)
Thermal Time
Constant,
Max. -
Still Air
(seconds)
Temperature
Rating
(°C)
SM102B1K 1000 10 B -3.3 2941 2 8 -55 to +220
SM102D1K 1000 10 D2 _3156 2 8 -55 to +220
SM102E1K 1000 10 E -3.67 3263 2 8 -55 to +220
SM202F1K 2000 10 F-3.86 3419 2 8 -55 to +220
SM222E1K 2186 10 E1 -3.82 3320 2 8 -55 to +220
SM252B1K 2500 10 B-3.31 2941 2 8 -55 to +220
SM252B4K 2500 10 B-3.31 2941 2 8 -55 to +220
SM103F5K 10000 10 F -3.86 3419 2 8 -55 to +220
SM103G1K 10000 10 G -4.04 3575 2 8 -55 to +220
SM103J1F 10000 1 J -4.4 3892 2 8 -55 to +220
SM103J1K 10000 10 J-4.4 3892 2 8 -55 to +220
SM403J1K 10000 10 J -4.4 3892 2 8 -55 to +220
SM472F1K 10000 10 F-3.86 3419 2 8 -55 to +220
SM472G1K 10000 10 G -4.03 3575 2 8 -55 to +220
SM501B1K 10000 10 B -3.31 2941 2 8 -55 to +220
SM153J1K 15000 10 J-4.4 3892 2 8 -55 to +220
SM602F1K 15000 10 F-3.86 3419 2 8 -55 to +220
SM203J1K 20000 10 J-4.4 3892 2 8 -55 to +220
SM253J1K 25000 10 J-4.4 3892 2 8 -55 to +220
SM303J1K 30000 10 J-4.4 3892 2 8 -55 to +220
SM104J1F 100000 1 J -4.4 3892 2 8 -55 to +220
SM104 J1K 100000 10 J-4.4 3892 2 8 -55 to +220
*Resistance tolerances of ± 1%, 2%, and 5% are available upon request
MELF Style Thermistor
Surface Mount Thermistors
LL 34 MiniMELF SM
% itteltuse" Expelm! ppm ‘Anxwevxbelwued
3littelfuse.com
© 2018 Littelfuse, Inc. Revised: February 26, 2018
Specifications are subject to change without notice.
Packaging
Packaging Option Packaging Code Standard Quantity Standard
Tape and Reel -TR 2500 EIA-481
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each
product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at:
www.littelfuse.com/disclaimer-electronics
MELF Style Thermistor
Surface Mount Thermistors
Specifications
Part
Number
Resistance
Ohms
@25°C
*Resistance
Tol. ± %
@ 25°C
R-T
Curve
Temperature
Coefficient
(% / °C)
@ 25°C
Beta (K)
0-50°C
Dissipation
Constant,
Nominal
(mW/°C)
Thermal Time
Constant,
Max. -
Still Air
(seconds)
Temperature
Rating
(°C)
SM104J1O 100000 _ J -4.4 3892 2 8 -55 to +220
SM104R1K 100000 10 R-4.68 4140 2 8 -55 to +220
SM502F1K 100000 10 F -3.86 3419 2 8 -55 to +220
SM503J1K 100000 10 J -4.4 3892 2 8 -55 to +220
SM504R1K 100000 10 R-4.68 4140 2 8 -55 to +220
SM254R1K 250000 10 R-4.68 4140 2 8 -55 to +220
SM105V3K 1000000 10 V3 -4.93 4369 2 8 -55 to +220
SM105R1K 1000000 10 R-4.68 4140 2 8 -55 to +220
*Resistance tolerances of ± 1%, 2%, and 5% are available upon request