TYPE LR25 SERIES
Product – Specification
1st April 2003
ISSUE 2
Telephone Tyco Passive Product Support Team ++ 44 (0) 1793 572484
Website – www.passives.tycoelectronics.com Email – passivesales@tycoelectronics.com
Page 1 of 3
Metal Film Fixed Resistor
TYPE LR25 SERIES
The resistive element comprises a thin film of
nickel-chrome alloy evaporated onto a high
thermal conductivity ceramic element. Metal
end caps are force fitted to the element prior
to spiralling to value. Tinned copper lead wires
are welded to the end caps and the components
are then coated. One coat of phenolic resin is
followed by three coats of epoxy resin. All
resistors are tested for value and tolerance.
KEY FEATURES
• Superior quality metal film resistors with 1%
tolerance. Ideally suited for general purpose use.
• Metal film resistors have excellent stability under
load and severe environmental conditions. They
exhibit very low noise current and voltage
coefficients. They are available in a wide range of
resistance values and are suitable for general
purpose and precision applications.
STOCKISTS:
This product is not available in Distribution.
TYPE LR25 SERIES
Product – Specification
1st April 2003
ISSUE 2
Telephone Tyco Passive Product Support Team ++ 44 (0) 1793 572484
Website – www.passives.tycoelectronics.com Email – passivesales@tycoelectronics.com
Page 2 of 3
DIMENSIONS
DERATING CURVE SURFACE TEMPERATURE RISE VS. LOAD
MARKING
The resistors are marked with a colour band code in accordance with IEC 62.
MOUNTING
The resistors are suitable for processing on automatic insertion equipment and cutting and bending machines.
SPECIFICATIONS UNITS LR25
Rated Power @ 70 °C Watts 0.25
Resistance Range Min Ohms 1R0 10R
Max Ohms 10M 1M
% 1 1 Tolerance
Code letter F F
Temperature Coefficient ppm/°C ± 100 ± 100
Selection Series E24 E96
Limiting Element Voltage Volts 250
Maximum Permitted Element Voltage Volts 250
Maximum Overload Voltage Volts 500
Max Intermittent Overload Voltage Volts 500
Operating Temperature Range 55 to +125
Climatic Category °C 55/125/56
Dielectric Strength Volts 500
Insulation Resistance Minimum Dry Mohms 1000
STYLE L* D d (nom)
LR25 5.6 ± 0.3 2.3 ± 0.2 0.55 ± 0.02
* Length is measured in accordance with IEC 294.
TYPE LR25 SERIES
Product – Specification
1st April 2003
ISSUE 2
Telephone Tyco Passive Product Support Team ++ 44 (0) 1793 572484
Website – www.passives.tycoelectronics.com Email – passivesales@tycoelectronics.com
Page 3 of 3
PACKAGING
LR25 resistors are normally supplied taped in 'ammo' boxes of 5000 pieces.
.
All tape specifications are in accordance with IEC 286-1.
PERFORMANCE CHARACTERISTICS
The evaluation of the performance characteristics is carried out with reference to IEC Specifications QC 400 000 and QC 400 100.
HOW TO ORDER
Orders for these components should include the following information:-
Type, tolerance code letter and value
e.g. LR25 J 24K
TEST REF Long Term Tests ±(1% + 0.05 ohm)
4.23 Climatic sequence
4.24 Damp heat, steady state
4.25.1 Endurance at 70 °C
4.25.3 Endurance at 125 °C
TEST REF Short Term Tests ±(0.25% + 0.05 ohm)
4.13 Overload
4.16 Robustness of terminations
4.18 Resistance to soldering heat
4.19 Rapid change of temperature
4.22 Vibration
This publication is issued to provide outline information only and (unless specifically agreed to the contrary by the Company in writing) is not to form part of any order or be
regarded as a representation relating to the products or service concerned. We reserve the right to alter without notice the specification, design, price or conditions of
supply of any product or service. Whilst Tyco Electronics Components products are of the very highest quality and reliability, all electronic components can occasionally
be subject to failure. Where failure of a Tyco Electronics Components product could result in life threatening consequences, then the circuit and application must
be discussed with the Company. Such areas might include ECG, respiratory and other medical and nuclear applications and any non fail-safe applications circuit.