Resistors-Chassis Mount

Part Number	Description / PDF	Quantity
HSA5R05J TE Connectivity AMP Connectors	RES CHAS MNT 0.05 OHM 5% 10W	54
HS50 390R J Ohmite	RES CHAS MNT 390 OHM 5% 50W	0
PFE5K4R50E Ohmite	RES CHAS MNT 4.5 OHM 10% 726W	4
810F20RE Ohmite	RES CHAS MNT 20 OHM 1% 10W	378
502BA503KDG2 Ohmite	10W 700J 50K OHMS 10% SLAB	7
850F15KE Ohmite	RES CHAS MNT 15K OHM 1% 50W	0
HCF80J330RJ TE Connectivity AMP Connectors	HCF80 75W 330R 5% LEAD	20
RER65F32R4RCSL Vishay / Dale	RES CHAS MNT 32.4 OHM 1% 10W	0
RER65F27R4PC02 Vishay / Dale	RES CHAS MNT 27.4 OHM 1% 10W	0
EWT25JB25R0 Stackpole Electronics, Inc.	RES CHAS MNT 25 OHM 5% 25W	0
HS50 4K7 J Ohmite	RES CHAS MNT 4.7K OHM 5% 50W	73
25WM315 NTE Electronics, Inc.	RES CHAS MNT 15K OHM 1% 25W	158
50WF150 NTE Electronics, Inc.	RES CHAS MNT 500 OHM 5% 50W	80
THS252R0J TE Connectivity AMP Connectors	RES CHAS MNT 2 OHM 5% 25W	353
FVT02506E500R0JE Vishay / Huntington Electric, Inc.	RES CHAS MNT 500 OHM 5% 25W	117
TE2500B12RJ TE Connectivity AMP Connectors	RES CHAS MNT 12 OHM 5% 2500W	0
HS50 360R J Ohmite	RES CHAS MNT 360 OHM 5% 50W	0
RER65F4991PC02 Vishay / Dale	RES CHAS MNT 4.99K OHM 1% 10W	0
L100J5R0E Ohmite	RES CHAS MNT 5 OHM 5% 100W	28
HSC10025RJ TE Connectivity AMP Connectors	RES CHAS MNT 25 OHM 5% 100W	76

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.