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Resistors-Chassis Mount

Image Part Number Description / PDF Quantity Rfq
10WMD20

10WMD20

NTE Electronics, Inc.

RES CHAS MNT 200M OHM 1% 10W

166
50WM133

50WM133

NTE Electronics, Inc.

RES CHAS MNT 330 OHM 1% 50W

102
50WM020

50WM020

NTE Electronics, Inc.

RES CHAS MNT 20 OHM 1% 50W

26
25WMD20

25WMD20

NTE Electronics, Inc.

RES CHAS MNT 200M OHM 1% 25W

144
25WMD05

25WMD05

NTE Electronics, Inc.

RES CHAS MNT 50M OHM 1% 25W

60
5WM125

5WM125

NTE Electronics, Inc.

RES CHAS MNT 250 OHM 1% 5W

184
10WM140

10WM140

NTE Electronics, Inc.

RES CHAS MNT 400 OHM 1% 10W

31
10WM147

10WM147

NTE Electronics, Inc.

RES CHAS MNT 470 OHM 1% 10W

126
50WM010

50WM010

NTE Electronics, Inc.

RES CHAS MNT 10 OHM 1% 50W

111
5WMD10

5WMD10

NTE Electronics, Inc.

RES CHAS MNT 100M OHM 1% 5W

148
25WF010

25WF010

NTE Electronics, Inc.

RES CHAS MNT 10 OHM 5% 25W

41
5WM115

5WM115

NTE Electronics, Inc.

RES CHAS MNT 150 OHM 1% 5W

78
300WF1D0

300WF1D0

NTE Electronics, Inc.

RES CHAS MNT 1 OHM 10% 300W

16
10WM4D0

10WM4D0

NTE Electronics, Inc.

RES CHAS MNT 4 OHM 1% 10W

7
12WF050

12WF050

NTE Electronics, Inc.

RES CHAS MNT 50 OHM 5% 12W

15
50WM040

50WM040

NTE Electronics, Inc.

RES CHAS MNT 40 OHM 1% 50W

24
50WM035

50WM035

NTE Electronics, Inc.

RES CHAS MNT 35 OHM 1% 50W

30
50WM410

50WM410

NTE Electronics, Inc.

RES CHAS MNT 100K OHM 5% 50W

37
5WM235

5WM235

NTE Electronics, Inc.

RES CHAS MNT 3.5K OHM 1% 5W

16
50WM015

50WM015

NTE Electronics, Inc.

RES CHAS MNT 15 OHM 1% 50W

88

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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