Resistors-Chassis Mount

Part Number	Description / PDF	Quantity
LPSA300H4R70JB Vishay / Sfernice	LPSA 300 H 4U7 5% BO15 E	13
HSA25R11J TE Connectivity AMP Connectors	RES CHAS MNT 0.11 OHM 5% 25W	101
EVRT170EN10RJE Ohmite	RES CHAS MNT 10 OHM 5% 200W	5
RER65F2R15PC02 Vishay / Dale	RES CHAS MNT 2.15 OHM 1% 10W	0
RER55F1R54RC02 Vishay / Dale	RES CHAS MNT 1.54 OHM 1% 30W	0
RER65F70R0PC02 Vishay / Dale	RES CHAS MNT 70 OHM 1% 10W	0
L50J5R0E Ohmite	RES CHAS MNT 5 OHM 5% 50W	16
RER65FR226RCSL Vishay / Dale	RES CHAS MNT 0.226 OHM 1% 10W	0
RER65F2211RCSL Vishay / Dale	RES CHAS MNT 2.21K OHM 1% 10W	0
TAP600K75RE Ohmite	RES CHAS MNT 75 OHM 10% 600W	0
RER55F3R32RC02 Vishay / Dale	RES CHAS MNT 3.32 OHM 1% 30W	0
RER65FR162RCSL Vishay / Dale	RES CHAS MNT 0.162 OHM 1% 10W	0
FVT02506E3R000JE Vishay / Huntington Electric, Inc.	RES CHAS MNT 3 OHM 5% 25W	21
THS25R22J TE Connectivity AMP Connectors	RES CHAS MNT 0.22 OHM 5% 25W	85
HCF216J33RJ TE Connectivity AMP Connectors	HCF216 200W 33R 5% LEAD	10
HS300 33R F Ohmite	RES CHAS MNT 33 OHM 1% 300W	0
EVFL170EN470JE Ohmite	RES CHAS MNT 470 OHM 5% 160W	0
RER65F10R2RC02 Vishay / Dale	RES CHAS MNT 10.2 OHM 1% 10W	0
5WM027 NTE Electronics, Inc.	RES CHAS MNT 27 OHM 1% 5W	177
UAL10-2KF8 Riedon	RES CHAS MNT 2K OHM 1% 10W	55

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.