Resistors-Chassis Mount

Part Number	Description / PDF	Quantity
HS250 16R F Ohmite	RES CHAS MNT 16 OHM 1% 250W	0
BAB326615R0KE Ohmite	15 OHMS 10% 1000 WATT CASE	7
HS25 22R J Ohmite	RES CHAS MNT 22 OHM 5% 25W	68
ARF500 68R J Ohmite	RES CHAS MNT 68 OHM 5% 500W	7
HS100 R27 J Ohmite	RES CHAS MNT 0.27 OHM 5% 100W	0
L225J5K0E Ohmite	RES CHAS MNT 5K OHM 5% 225W	52
HS50 20R F Ohmite	RES CHAS MNT 20 OHM 1% 50W	44
850F2R0E Ohmite	RES CHAS MNT 2 OHM 1% 50W	24
HS15 2R7 J Ohmite	RES CHAS MNT 2.7 OHM 5% 15W	0
HS15 R05 J Ohmite	RES CHAS MNT 0.05 OHM 5% 15W	0
HS50 2K F Ohmite	RES CHAS MNT 2K OHM 1% 50W	0
EVFL252EP100KJE Ohmite	RES CHAS MNT 100K OHM 5% 280W	13
HS25 560R J Ohmite	RES CHAS MNT 560 OHM 5% 25W	0
WFH330L27RJE Ohmite	RES CHAS MNT 27 OHM 5% 330W	0
TAP800KR33E Ohmite	RES CHAS MNT 0.33 OHM 10% 800W	21
HS25 560R F Ohmite	RES CHAS MNT 560 OHM 1% 25W	0
HS75 100R F Ohmite	RES CHAS MNT 100 OHM 1% 75W	10
TL88K5R00E Ohmite	RES CHAS MNT 5 OHM 10% 114W	0
850F100KE Ohmite	RES CHAS MNT 100K OHM 1% 50W	44
HS50 5R J Ohmite	RES CHAS MNT 5 OHM 5% 50W	65

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.