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Resistors-Chassis Mount

Image Part Number Description / PDF Quantity Rfq
100WF050

100WF050

NTE Electronics, Inc.

RES CHAS MNT 50 OHM 5% 100W

59
50WM125

50WM125

NTE Electronics, Inc.

RES CHAS MNT 250 OHM 1% 50W

187
12WF250

12WF250

NTE Electronics, Inc.

RES CHAS MNT 5K OHM 5% 12W

67
50WF250

50WF250

NTE Electronics, Inc.

RES CHAS MNT 5K OHM 5% 50W

73
300WF5D0

300WF5D0

NTE Electronics, Inc.

RES CHAS MNT 5 OHM 10% 300W

96
25WM030

25WM030

NTE Electronics, Inc.

RES CHAS MNT 30 OHM 1% 25W

40
5WM320

5WM320

NTE Electronics, Inc.

RES CHAS MNT 20K OHM 5% 5W

180
10WM047

10WM047

NTE Electronics, Inc.

RES CHAS MNT 47 OHM 1% 10W

17
25WM150

25WM150

NTE Electronics, Inc.

RES CHAS MNT 500 OHM 1% 25W

73
300WF010

300WF010

NTE Electronics, Inc.

RES CHAS MNT 10 OHM 10% 300W

28
25WM340

25WM340

NTE Electronics, Inc.

RES CHAS MNT 40K OHM 5% 25W

35
100WF125

100WF125

NTE Electronics, Inc.

RES CHAS MNT 250 OHM 5% 100W

142
50WM060

50WM060

NTE Electronics, Inc.

RES CHAS MNT 60 OHM 1% 50W

33
50WM310

50WM310

NTE Electronics, Inc.

RES CHAS MNT 10K OHM 1% 50W

80
50WM315

50WM315

NTE Electronics, Inc.

RES CHAS MNT 15K OHM 1% 50W

121
25WA010

25WA010

NTE Electronics, Inc.

RES CHAS MNT 10 OHM 10% 25W

23
50WM033

50WM033

NTE Electronics, Inc.

RES CHAS MNT 33 OHM 1% 50W

96
50WF010

50WF010

NTE Electronics, Inc.

RES CHAS MNT 10 OHM 5% 50W

25
25WM047

25WM047

NTE Electronics, Inc.

RES CHAS MNT 47 OHM 1% 25W

148
5WM130

5WM130

NTE Electronics, Inc.

RES CHAS MNT 300 OHM 1% 5W

0

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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