Resistors-Chassis Mount

Part Number	Description / PDF	Quantity
HS150 470R J Ohmite	RES CHAS MNT 470 OHM 5% 150W	0
HS15 R47 J Ohmite	RES CHAS MNT 0.47 OHM 5% 15W	0
TGHEV25R0FE Ohmite	100W RESISTOR 25 OHM 1%	2
HS25 R27 J Ohmite	RES CHAS MNT 0.27 OHM 5% 25W	0
HS25 15K F Ohmite	RES CHAS MNT 15K OHM 1% 25W	0
F40J1K0E Ohmite	RES CHAS MNT 1K OHM 5% 40W	0
HS300 2R2 F Ohmite	RES CHAS MNT 2.2 OHM 1% 300W	15
810F25KE Ohmite	RES CHAS MNT 25K OHM 1% 10W	0
L100J100 Ohmite	RES CHAS MNT 100 OHM 5% 100W	0
HS25 4R F Ohmite	RES CHAS MNT 4 OHM 1% 25W	205
HS50 75R J Ohmite	RES CHAS MNT 75 OHM 5% 50W	156
825F40RE Ohmite	RES CHAS MNT 40 OHM 1% 25W	150
TA1K0PH15R0KE Ohmite	RES CHAS MNT 15 OHM 10% 1000W	17
HS500 25R J Ohmite	500 WATT CHASSIS MOUNT	1
HS25 1R J Ohmite	RES CHAS MNT 1 OHM 5% 25W	188
TGHGCR0200FE Ohmite	RES CHAS MNT 0.02 OHM 1% 100W	0
L225J2K5E Ohmite	RES CHAS MNT 2.5K OHM 5% 225W	10
TAP650J1R0E Ohmite	650W HEATSINKABLE 1 OHM	31
HS200 R33 F Ohmite	RES CHAS MNT 0.33 OHM 1% 200W	0
506SP100KG2 Ohmite	90W 800J 10 OHMS 10% SLAB	13

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.