Resistors-Chassis Mount

Part Number	Description / PDF	Quantity
10WM130 NTE Electronics, Inc.	RES CHAS MNT 300 OHM 1% 10W	8
RER65FR118RC02 Vishay / Dale	RES CHAS MNT 0.118 OHM 1% 10W	0
TGHMV5K00JE Ohmite	5K OHM 300 WATT SOT227 5% TF	13
HSA506K8J TE Connectivity AMP Connectors	RES CHAS MNT 6.8K OHM 5% 50W	151
RER65F1000PC02 Vishay / Dale	RES CHAS MNT 100 OHM 1% 10W	0
TAP600J500E Ohmite	RES CHAS MNT 500 OHM 5% 600W	0
HS300 2K2 F Ohmite	RES CHAS MNT 2.2K OHM 1% 300W	0
HS150 33R F Ohmite	RES CHAS MNT 33 OHM 1% 150W	0
HS250 2R F Ohmite	RES CHAS MNT 2 OHM 1% 250W	0
10WM033 NTE Electronics, Inc.	RES CHAS MNT 33 OHM 1% 10W	127
RER65F22R1RCSL Vishay / Dale	RES CHAS MNT 22.1 OHM 1% 10W	0
EVFL170EN4R7JE Ohmite	RES CHAS MNT 4.7 OHM 5% 160W	0
TE150B22RJ TE Connectivity AMP Connectors	RES CHAS MNT 22 OHM 5% 150W	20
WFH160L250JE Ohmite	RES CHAS MNT 250 OHM 5% 160W	70
THS1539RJ TE Connectivity AMP Connectors	RES CHAS MNT 39 OHM 5% 15W	220
AHA25AFB-2K Yageo	RES CHAS MNT 2K OHM 1% 25W	0
RER55F31R6RC02 Vishay / Dale	RES CHAS MNT 31.6 OHM 1% 30W	0
886AS500KDS Ohmite	30W 7000J 50 OHMS 10% TUBULAR	4
HS75 4R F Ohmite	RES CHAS MNT 4 OHM 1% 75W	0
10WM2D5 NTE Electronics, Inc.	RES CHAS MNT 2.5 OHM 1% 10W	48

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.