Resistors-Chassis Mount

Part Number	Description / PDF	Quantity
RER55F82R5RCSL Vishay / Dale	RES CHAS MNT 82.5 OHM 1% 30W	0
RER55F32R4RC02 Vishay / Dale	RES CHAS MNT 32.4 OHM 1% 30W	0
RER65F2260RC02 Vishay / Dale	RES CHAS MNT 226 OHM 1% 10W	0
RER65F1101RC02 Vishay / Dale	RES CHAS MNT 1.1K OHM 1% 10W	0
RER55F3R30RCSL Vishay / Dale	RES CHAS MNT 3.3 OHM 1% 30W	0
RER55F1371MCSL Vishay / Dale	RES CHAS MNT 1.37K OHM 1% 30W	0
RER55F57R6RC02 Vishay / Dale	RES CHAS MNT 57.6 OHM 1% 30W	0
RER65F59R0RCSL Vishay / Dale	RES CHAS MNT 59 OHM 1% 10W	0
RER65FR133RCSL Vishay / Dale	RES CHAS MNT 0.133 OHM 1% 10W	0
RH05012R00FE02 Vishay / Dale	RES CHAS MNT 12 OHM 1% 50W	8
TMC005390R0FE02 Vishay / Dale	RES CHAS MNT 390 OHM 1% 7.5W	0
RER55F28R0RC02 Vishay / Dale	RES CHAS MNT 28 OHM 1% 30W	0
RER65F69R8MC02 Vishay / Dale	RES CHAS MNT 69.8 OHM 1% 10W	0
RER65FR196MC02 Vishay / Dale	RES CHAS MNT 0.196 OHM 1% 10W	0
RER65F5R62RCSL Vishay / Dale	RES CHAS MNT 5.62 OHM 1% 10W	0
RER65F2550RCSL Vishay / Dale	RES CHAS MNT 255 OHM 1% 10W	0
RER65F84R5RCSL Vishay / Dale	RES CHAS MNT 84.5 OHM 1% 10W	0
RER65F1650RC02 Vishay / Dale	RES CHAS MNT 165 OHM 1% 10W	0
RER65FR237RCSL Vishay / Dale	RES CHAS MNT 0.237 OHM 1% 10W	0
NH250R1000FE01 Vishay / Dale	RES CHAS MNT 0.1 OHM 1% 250W	13

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

Type	Functional Features	Application Examples
Wirewound Chassis Mount	High precision, pulse stability, 10-100W power rating	Industrial motor drives, test equipment
Film Type Chassis Mount	Low noise, fast response, 5-50W rating	Communication infrastructure, medical devices
Ceramic Composite Mount	High-temperature resistance, 50-300W rating	EV 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

Parameter	Importance	Typical Range
Rated Power	Determines thermal handling capacity	5-500W
Resistance Range	Affects current regulation precision	0.1 -100k
Tolerance	Impacts circuit accuracy	0.5% to 5%
Temperature Coefficient	Stability over operating temperature	50-200ppm/ C
Dielectric Strength	Safety insulation performance	1.5-5kV

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

Manufacturer	Representative Product	Key Features
Vishay Precision Group	CPW-100	100W wirewound, 0.1% tolerance
Ohmite Manufacturing	270 series	500W ceramic housing, IP65 rated
Panasonic Electronic	ERJ-P11	Thin-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.