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Resistors-Chassis Mount

Image Part Number Description / PDF Quantity Rfq
25WM225

25WM225

NTE Electronics, Inc.

RES CHAS MNT 2.5K OHM 1% 25W

144
12WF210

12WF210

NTE Electronics, Inc.

RES CHAS MNT 1K OHM 5% 12W

33
25WM310

25WM310

NTE Electronics, Inc.

RES CHAS MNT 10K OHM 1% 25W

49
25WM130

25WM130

NTE Electronics, Inc.

RES CHAS MNT 300 OHM 1% 25W

166
5WM310

5WM310

NTE Electronics, Inc.

RES CHAS MNT 10K OHM 1% 5W

99
25WM315

25WM315

NTE Electronics, Inc.

RES CHAS MNT 15K OHM 1% 25W

158
50WF150

50WF150

NTE Electronics, Inc.

RES CHAS MNT 500 OHM 5% 50W

80
25WA250

25WA250

NTE Electronics, Inc.

RES CHAS MNT 5K OHM 10% 25W

28
10WM150

10WM150

NTE Electronics, Inc.

RES CHAS MNT 500 OHM 1% 10W

105
5WM156

5WM156

NTE Electronics, Inc.

RES CHAS MNT 560 OHM 1% 5W

27
5WM2D5

5WM2D5

NTE Electronics, Inc.

RES CHAS MNT 2.5 OHM 1% 5W

72
10WM030

10WM030

NTE Electronics, Inc.

RES CHAS MNT 30 OHM 1% 10W

154
25WM330

25WM330

NTE Electronics, Inc.

RES CHAS MNT 30K OHM 5% 25W

66
25WM210

25WM210

NTE Electronics, Inc.

RES CHAS MNT 1K OHM 1% 25W

209
10WM025

10WM025

NTE Electronics, Inc.

RES CHAS MNT 25 OHM 1% 10W

132
50WM115

50WM115

NTE Electronics, Inc.

RES CHAS MNT 150 OHM 1% 50W

36
5WM025

5WM025

NTE Electronics, Inc.

RES CHAS MNT 25 OHM 1% 5W

147
25WM240

25WM240

NTE Electronics, Inc.

RES CHAS MNT 4K OHM 1% 25W

8
5WM027

5WM027

NTE Electronics, Inc.

RES CHAS MNT 27 OHM 1% 5W

177
225WF210

225WF210

NTE Electronics, Inc.

RES CHAS MNT 1K OHM 5% 225W

3

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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