Resistors-Chassis Mount

Part Number	Description / PDF	Quantity
AHA50AFB-25R Yageo	RES CHAS MNT 25 OHM 1% 50W	78
RER55F3010RC02 Vishay / Dale	RES CHAS MNT 301 OHM 1% 30W	0
HSA25270RJ TE Connectivity AMP Connectors	RES CHAS MNT 270 OHM 5% 25W	7
RER55F1430RCSL Vishay / Dale	RES CHAS MNT 143 OHM 1% 30W	0
FSOT4009E5K000KE Vishay / Huntington Electric, Inc.	RES CHAS MNT 5K OHM 10% 40W	0
THS50R47J TE Connectivity AMP Connectors	RES CHAS MNT 0.47 OHM 5% 50W	68
10WM240 NTE Electronics, Inc.	RES CHAS MNT 4K OHM 1% 10W	113
HSA25300RJ TE Connectivity AMP Connectors	RES CHAS MNT 300 OHM 5% 25W	107
10WM5D0 NTE Electronics, Inc.	RES CHAS MNT 5 OHM 1% 10W	153
TMC05075R00FE02 Vishay / Dale	RES CHAS MNT 75 OHM 1% 50W	61
HS50 22R J Ohmite	RES CHAS MNT 22 OHM 5% 50W	152
L25J750E Ohmite	RES CHAS MNT 750 OHM 5% 25W	11
AHA500JB-22R Yageo	RES CHAS MNT 22 OHM 5% 5W	0
LPS0600L1001JB Vishay / Sfernice	LPS 600 L 1K 5% BO15	0
HS100 470R J Ohmite	RES CHAS MNT 470 OHM 5% 100W	0
BRT120-5RJ8 Riedon	RES CHAS MNT 5 OHM 5% 120W	9
HS50 75R F Ohmite	RES CHAS MNT 75 OHM 1% 50W	240
TE100B180RJ TE Connectivity AMP Connectors	RES CHAS MNT 180 OHM 5% 100W	12
RER65F7870RCSL Vishay / Dale	RES CHAS MNT 787 OHM 1% 10W	0
KAL50JB20R0 Stackpole Electronics, Inc.	RES CHAS MNT 20 OHM 5% 50W	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.