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Resistors-Chassis Mount

Image Part Number Description / PDF Quantity Rfq
50WMD20

50WMD20

NTE Electronics, Inc.

RES CHAS MNT 200M OHM 1% 50W

25
25WM350

25WM350

NTE Electronics, Inc.

RES CHAS MNT 50K OHM 5% 25W

0
5WM325

5WM325

NTE Electronics, Inc.

RES CHAS MNT 25K OHM 5% 5W

136
50WM5D0

50WM5D0

NTE Electronics, Inc.

RES CHAS MNT 5 OHM 1% 50W

191
25WM033

25WM033

NTE Electronics, Inc.

RES CHAS MNT 33 OHM 1% 25W

118
10WM156

10WM156

NTE Electronics, Inc.

RES CHAS MNT 560 OHM 1% 10W

159
25WM020

25WM020

NTE Electronics, Inc.

RES CHAS MNT 20 OHM 1% 25W

149
5WM5D0

5WM5D0

NTE Electronics, Inc.

RES CHAS MNT 5 OHM 1% 5W

156
10WM075

10WM075

NTE Electronics, Inc.

RES CHAS MNT 75 OHM 1% 10W

154
50WM156

50WM156

NTE Electronics, Inc.

RES CHAS MNT 560 OHM 1% 50W

194
50WM047

50WM047

NTE Electronics, Inc.

RES CHAS MNT 47 OHM 1% 50W

16
100WF010

100WF010

NTE Electronics, Inc.

RES CHAS MNT 10 OHM 5% 100W

40
10WM035

10WM035

NTE Electronics, Inc.

RES CHAS MNT 35 OHM 1% 10W

136
25WF110

25WF110

NTE Electronics, Inc.

RES CHAS MNT 100 OHM 5% 25W

88
5WM035

5WM035

NTE Electronics, Inc.

RES CHAS MNT 35 OHM 1% 5W

159
10WM320

10WM320

NTE Electronics, Inc.

RES CHAS MNT 20K OHM 1% 10W

3
225WF050

225WF050

NTE Electronics, Inc.

RES CHAS MNT 50 OHM 5% 225W

13
5WM120

5WM120

NTE Electronics, Inc.

RES CHAS MNT 200 OHM 1% 5W

104
5WM047

5WM047

NTE Electronics, Inc.

RES CHAS MNT 47 OHM 1% 5W

48
50WM140

50WM140

NTE Electronics, Inc.

RES CHAS MNT 400 OHM 1% 50W

157

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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