Resistors-Chassis Mount

Part Number	Description / PDF	Quantity
SQBW30470RJFASTON TE Connectivity AMP Connectors	RES CHAS MNT 470 OHM 5% 30W	1012
TGHLV500RJE Ohmite	RES CHAS MNT 500 OHM 5% 200W	132
RER55F4R02MC02 Vishay / Dale	RES CHAS MNT 4.02 OHM 1% 30W	0
HS25 6K8 J Ohmite	RES CHAS MNT 6.8K OHM 5% 25W	0
RER65F6040RC02 Vishay / Dale	RES CHAS MNT 604 OHM 1% 10W	0
HSC15033RJ TE Connectivity AMP Connectors	RES CHAS MNT 33 OHM 5% 150W	29
RER65F60R4RC02 Vishay / Dale	RES CHAS MNT 60.4 OHM 1% 10W	0
LPSA800H4R70KB Vishay / Sfernice	LPSA 800 H 4U7 10% BO15	0
RER65F3651RC02 Vishay / Dale	RES CHAS MNT 3.65K OHM 1% 10W	0
RSI-1200-100 Riedon	RES CHAS MNT 83 UOHM 0.25%	0
HS300 220R J Ohmite	RES CHAS MNT 220 OHM 5% 300W	0
HS10 4R F Ohmite	RES CHAS MNT 4 OHM 1% 10W	0
HSA5050KJ TE Connectivity AMP Connectors	RES CHAS MNT 50K OHM 5% 50W	1712
RER65F8R66RCSL Vishay / Dale	RES CHAS MNT 8.66 OHM 1% 10W	0
RH00525R00FE02 Vishay / Dale	RES CHAS MNT 25 OHM 1% 7.5W	95
MCRL004525R00KHB00 Vishay / Huntington Electric, Inc.	RES CHAS MNT 25 OHM 10% 45W	0
FVT20020E250R0JE Vishay / Huntington Electric, Inc.	RES CHAS MNT 250 OHM 5% 225W	243
RER65F7R32RC02 Vishay / Dale	RES CHAS MNT 7.32 OHM 1% 10W	0
25WM240 NTE Electronics, Inc.	RES CHAS MNT 4K OHM 1% 25W	8
FVTS10R1E500R0JE Vishay / Huntington Electric, Inc.	RES CHAS MNT 500 OHM 5% 12W	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

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.