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Resistors-Chassis Mount

Image Part Number Description / PDF Quantity Rfq
225WF110

225WF110

NTE Electronics, Inc.

RES CHAS MNT 100 OHM 5% 225W

21
5WM1D0

5WM1D0

NTE Electronics, Inc.

RES CHAS MNT 1 OHM 1% 5W

33
50WM025

50WM025

NTE Electronics, Inc.

RES CHAS MNT 25 OHM 1% 50W

141
10WM015

10WM015

NTE Electronics, Inc.

RES CHAS MNT 15 OHM 1% 10W

392
50WM4D0

50WM4D0

NTE Electronics, Inc.

RES CHAS MNT 4 OHM 1% 50W

296
5WM210

5WM210

NTE Electronics, Inc.

RES CHAS MNT 1K OHM 1% 5W

114
50WM147

50WM147

NTE Electronics, Inc.

RES CHAS MNT 470 OHM 1% 50W

74
25WM010

25WM010

NTE Electronics, Inc.

RES CHAS MNT 10 OHM 1% 25W

168
50WM225

50WM225

NTE Electronics, Inc.

RES CHAS MNT 2.5K OHM 1% 50W

117
10WM215

10WM215

NTE Electronics, Inc.

RES CHAS MNT 1.5K OHM 1% 10W

103
25WM110

25WM110

NTE Electronics, Inc.

RES CHAS MNT 100 OHM 1% 25W

6
25WM016

25WM016

NTE Electronics, Inc.

RES CHAS MNT 16 OHM 1% 25W

206
50WM120

50WM120

NTE Electronics, Inc.

RES CHAS MNT 200 OHM 1% 50W

64
25WM060

25WM060

NTE Electronics, Inc.

RES CHAS MNT 60 OHM 1% 25W

140
10WM175

10WM175

NTE Electronics, Inc.

RES CHAS MNT 750 OHM 1% 10W

139
25WM235

25WM235

NTE Electronics, Inc.

RES CHAS MNT 3.5K OHM 1% 25W

34
5WM230

5WM230

NTE Electronics, Inc.

RES CHAS MNT 3K OHM 1% 5W

144
50WMD10

50WMD10

NTE Electronics, Inc.

RES CHAS MNT 100M OHM 1% 50W

170
10WM040

10WM040

NTE Electronics, Inc.

RES CHAS MNT 40 OHM 1% 10W

57
5WM030

5WM030

NTE Electronics, Inc.

RES CHAS MNT 30 OHM 1% 5W

204

Resistors-Chassis Mount

1. Overview

Chassis Mount Resistors are specialized electronic components designed for direct mounting onto equipment chassis or heat sinks. They provide critical functions including current limiting, voltage division, and energy dissipation in high-power applications. Their importance in modern technology lies in enabling thermal management stability and electrical performance in industrial, automotive, and power electronics systems.

2. Major Types and Functional Classification

TypeFunctional FeaturesApplication Examples
Wirewound Chassis MountHigh precision, pulse stability, 10-100W power ratingIndustrial motor drives, test equipment
Film Type Chassis MountLow noise, fast response, 5-50W ratingCommunication infrastructure, medical devices
Ceramic Composite MountHigh-temperature resistance, 50-300W ratingEV charging systems, renewable energy inverters

3. Structure and Composition

Typical construction includes:

  • Aluminum alloy heat-dissipating housing (surface-anodized for insulation)
  • High-purity ceramic substrate with resistive element (NiCr or TaN)
  • Multi-layer silicone coating for vibration resistance
  • Brass/copper alloy mounting terminals (anti-corrosion plated)

Thermal interface materials (TIM) ensure efficient heat transfer to chassis.

4. Key Technical Specifications

ParameterImportanceTypical Range
Rated PowerDetermines thermal handling capacity5-500W
Resistance RangeAffects current regulation precision0.1 -100k
ToleranceImpacts circuit accuracy 0.5% to 5%
Temperature CoefficientStability over operating temperature50-200ppm/ C
Dielectric StrengthSafety insulation performance1.5-5kV

5. Application Fields

Primary industries include:

  • Industrial automation (variable frequency drives, PLCs)
  • Renewable energy (solar inverters, wind turbine converters)
  • Transportation (EV on-board chargers, railway traction systems)
  • Telecommunications (base station power amplifiers, data center PSUs)

Case Study: 300W ceramic composite resistors in EV fast chargers enable 15-minute battery charging cycles.

6. Leading Manufacturers and Products

ManufacturerRepresentative ProductKey Features
Vishay Precision GroupCPW-100100W wirewound, 0.1% tolerance
Ohmite Manufacturing270 series500W ceramic housing, IP65 rated
Panasonic ElectronicERJ-P11Thin-film technology, 100ppm/ C stability

7. Selection Guidelines

Key considerations:

  • Calculate required power derating (70% of max rating recommended)
  • Match resistance value with system voltage/current requirements
  • Evaluate thermal interface compatibility with chassis
  • Consider environmental factors (humidity, vibration, ambient temperature)
  • Budget allocation: High-reliability models may cost 2-3 standard versions

8. Industry Trends Analysis

Current development trends include:

  • Nano-ceramic materials enabling 40% smaller form factors
  • Integrated temperature sensing resistors for smart power systems
  • Graphene-enhanced thermal coatings improving heat dissipation by 25%
  • Automotive-grade models supporting 150 C operating temperatures
  • Industry 4.0 compatibility with IoT-enabled resistance monitoring

Market projections indicate 8.7% CAGR through 2030 driven by EV and 5G infrastructure demands.

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