Resistors-Chassis Mount

Part Number	Description / PDF	Quantity
12WF125 NTE Electronics, Inc.	RES CHAS MNT 250 OHM 5% 12W	32
TE750B1K0J TE Connectivity AMP Connectors	RES CHAS MNT 1K OHM 5% 750W	25
AHA10AJB-5R Yageo	RES CHAS MNT 5 OHM 5% 10W	164
TE200B180RJ TE Connectivity AMP Connectors	RES CHAS MNT 180 OHM 5% 200W	5
EVRT252EP10RJE Ohmite	RES CHAS MNT 10 OHM 5% 350W	5
L225J10RE Ohmite	RES CHAS MNT 10 OHM 5% 225W	113
HS25 33R F Ohmite	RES CHAS MNT 33 OHM 1% 25W	0
RER65F8R66RC02 Vishay / Dale	RES CHAS MNT 8.66 OHM 1% 10W	0
FVT20020E50R00JE Vishay / Huntington Electric, Inc.	RES CHAS MNT 50 OHM 5% 225W	153
UAL50-2R5F8 Riedon	RES CHAS MNT 2.5 OHM 1% 50W	172
THS1082RJ TE Connectivity AMP Connectors	RES CHAS MNT 82 OHM 5% 10W	501
RER65F45R3RC02 Vishay / Dale	RES CHAS MNT 45.3 OHM 1% 10W	0
THS506K8J TE Connectivity AMP Connectors	RES CHAS MNT 6.8K OHM 5% 50W	67
RER65F5491RCSL Vishay / Dale	RES CHAS MNT 5.49K OHM 1% 10W	0
RER65F4R02RC02 Vishay / Dale	RES CHAS MNT 4.02 OHM 1% 10W	0
HS300 5R F Ohmite	RES CHAS MNT 5 OHM 1% 300W	16
25WF210 NTE Electronics, Inc.	RES CHAS MNT 1K OHM 5% 25W	68
HSC200250RJ TE Connectivity AMP Connectors	RES CHAS MNT 250 OHM 5% 200W	13
HCF110J6R8J TE Connectivity AMP Connectors	HCF110 100W 6R8 5% LEAD	20
TE200B560RJ TE Connectivity AMP Connectors	RES CHAS MNT 560 OHM 5% 200W	7

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.