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Resistors-Chassis Mount

Image Part Number Description / PDF Quantity Rfq
25WM325

25WM325

NTE Electronics, Inc.

RES CHAS MNT 25K OHM 5% 25W

144
10WM110

10WM110

NTE Electronics, Inc.

RES CHAS MNT 100 OHM 1% 10W

93
225WF250

225WF250

NTE Electronics, Inc.

RES CHAS MNT 5K OHM 5% 225W

13
5WM330

5WM330

NTE Electronics, Inc.

RES CHAS MNT 30K OHM 5% 5W

392
225WF125

225WF125

NTE Electronics, Inc.

RES CHAS MNT 250 OHM 5% 225W

15
5WM250

5WM250

NTE Electronics, Inc.

RES CHAS MNT 5K OHM 1% 5W

87
25WA210

25WA210

NTE Electronics, Inc.

RES CHAS MNT 1K OHM 10% 25W

57
25WM025

25WM025

NTE Electronics, Inc.

RES CHAS MNT 25 OHM 1% 25W

12
25WM125

25WM125

NTE Electronics, Inc.

RES CHAS MNT 250 OHM 1% 25W

121
100WF150

100WF150

NTE Electronics, Inc.

RES CHAS MNT 500 OHM 5% 100W

72
12WF025

12WF025

NTE Electronics, Inc.

RES CHAS MNT 25 OHM 5% 12W

22
25WM012

25WM012

NTE Electronics, Inc.

RES CHAS MNT 12 OHM 1% 25W

44
10WMD50

10WMD50

NTE Electronics, Inc.

RES CHAS MNT 500M OHM 1% 10W

169
25WMD10

25WMD10

NTE Electronics, Inc.

RES CHAS MNT 100M OHM 1% 25W

47
100WF250

100WF250

NTE Electronics, Inc.

RES CHAS MNT 5K OHM 5% 100W

5
10WM310

10WM310

NTE Electronics, Inc.

RES CHAS MNT 10K OHM 1% 10W

48
25WF125

25WF125

NTE Electronics, Inc.

RES CHAS MNT 250 OHM 5% 25W

32
50WM3D0

50WM3D0

NTE Electronics, Inc.

RES CHAS MNT 3 OHM 5% 50W

136
10WM233

10WM233

NTE Electronics, Inc.

RES CHAS MNT 3.3K OHM 1% 10W

158
5WM3D0

5WM3D0

NTE Electronics, Inc.

RES CHAS MNT 3 OHM 1% 5W

91

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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