Leaded Thermistors
Glass Encapsulated Thermistor
USUG1000 Series UL Recognized DO-35 Glass Encapsulated Thermistors
Description
Littelfuse low cost interchangeable glass encapsulated thermistors
are manufactured using super stable, precision NTC chips which
are hermetically sealed in a glass (DO-35 diode style) package.
The result is a device which exhibits excellent long term reliability
and stability even when subjected to severe environmental
or thermal conditions. They are well suited for uses where their
interchangeability eliminates the necessity for costly individual
circuit calibration. Their uniform dimensions and axial lead
configuration make them especially suitable for use with automatic
insertion equipment.
Features
Agency Approvals
• Temperature rating =
• Excellent long-term
• Hermetically sealed
• Tinned CSS Lead
-40 to +150°C
AGENCY
AGENCY FILE NUMBER
glass package
E232830
stability
Wires are Solderable
or Weldable
Part Numbering System
Dimensions
USUG10 0 0-10 3 G
GLASS
BODY
Resistance Tolerance
DO-35 UL Series
A
Resistance @ 25ºC
Base Value
B
G = ±2%
J = ±5%
K = ±10%
Multiplier, power of 10
Ex. 103 = 10 Ω x 103 = 10,000 Ω
C
Note: Not all combinations of Part Number codes are available. Contact Littelfuse for details.
Dimensions shown in inches.
A
B
C
A
B
0.020" ±0.002"
0.075"
0.160"
24 AWG TINNED CCS
MAX
MAX
0.020”±0.002”
1.0" LONG MIN
0.075”
24 AWG Tinned CCS
Max
1.0”GLASS
LongENCAPSULATED
Min
THERMISTORS
C
0.160”
Max
GLASS BODY
020" 0.002"
Packaging
AWG TINNED CCS
0" LONG MIN
Packaging Option
Packaging Code
Tape and Reel
-TR
0.160"
MAX
© 2021 Littelfuse, Inc. Revised: March 23, 2021
Specifications are subject to change without notice.
Quantity
0.075"Standard
MAX
5000
1
Standard
EIA-296
littelfuse.com
Leaded Thermistors
Glass Encapsulated Thermistor
USUG1000 Series UL Recognized DO-35 Glass Encapsulated 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
Max.
Power
Rating
(mW)
Dissipation
Constant,
Nominal
(mW/°C)
Temperature
Rating
(°C)
USUG1000-103G
10000
2
J
_
3892
20
2
-40 to +150
USUG1000-103J
10000
5
J
_
3892
20
2
-40 to +150
USUG1000-103K
10000
10
J
_
3892
20
2
-40 to +150
USUG1000-203G
20000
2
J
_
3892
20
2
-40 to +150
USUG1000-203J
20000
5
J
_
3892
20
2
-40 to +150
USUG1000-203K
20000
10
J
_
3892
20
2
-40 to +150
USUG1000-253G
25000
2
J
_
3892
20
2
-40 to +150
USUG1000-253J
25000
5
J
_
3892
20
2
-40 to +150
USUG1000-253K
25000
10
J
_
3892
20
2
-40 to +150
USUG1000-303G
30000
2
J
_
3892
20
2
-40 to +150
USUG1000-303J
30000
5
J
_
3892
20
2
-40 to +150
USUG1000-303K
30000
10
J
_
3892
20
2
-40 to +150
USUG1000-503G
50000
2
J
_
3892
20
2
-40 to +150
USUG1000-503J
50000
5
J
_
3892
20
2
-40 to +150
USUG1000-503K
50000
10
J
-3.67
3892
20
2
-40 to +150
USUG1000-104G
100000
2
J
_
3892
20
2
-40 to +150
USUG1000-104J
100000
5
J
_
3892
20
2
-40 to +150
USUG1000-104K
100000
10
J
_
3892
20
2
-40 to +150
USUG1000-254G
250000
2
J
_
3892
20
2
-40 to +150
USUG1000-254J
250000
5
J
_
3892
20
2
-40 to +150
USUG1000-254K
250000
10
J
_
3892
20
2
-40 to +150
*Resistance tolerances of ± 1%, 2%, and 5% are available upon request
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
© 2021 Littelfuse, Inc. Revised: March 23, 2021
Specifications are subject to change without notice.
2
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