Resistors-Chassis Mount

Part Number	Description / PDF	Quantity
RH50221R0FS03 Vishay / Sfernice	RH 50 221U 1% BA10	0
RPS0500DH1000JB Vishay / Sfernice	RES CHAS MNT 100 OHM 5% 500W	27
RTOP200V39R0JB Vishay / Sfernice	RTOP 200 39U 5% V BO10	0
LPS0800H79R0JB Vishay / Sfernice	LPS 800 H 79U 5% BO15	0
RPS0500DH2R00JB Vishay / Sfernice	RPS 500D H 2U 5% BO15	0
RPS0500DH22R0JB Vishay / Sfernice	RES CHAS MNT 22 OHM 5% 500W	11
RCEC400GS1003JB Vishay / Sfernice	RCEC 400 GS 100K 5% BO20	0
LPSA800L1000JB Vishay / Sfernice	LPSA 800 L 100U 5% BO15	0
RCH50S10001JS06 Vishay / Sfernice	RES CHAS MNT 10K OHM 5% 50W	143
LPSA600L33R0JB Vishay / Sfernice	LPSA 600 L 33U 5% BO15	0
RCH25S10001JS06 Vishay / Sfernice	RES CHAS MNT 10K OHM 5% 25W	0
LPSA300H10R0JB Vishay / Sfernice	LPSA 300 H 10U 5% BO15 E	42
LPS0800H1R00JB Vishay / Sfernice	RES CHAS MNT 1 OHM 5% 800W	112
LPSA600L4700JB Vishay / Sfernice	LPSA 600 L 470U 5% BO15	0
RH256R800KS03 Vishay / Sfernice	SFERNICE FIXED RESISTORS	0
RWST25138B47R0JB00 Vishay / Sfernice	SFERNICE FIXED RESISTORS	0
RCH50V56R00JS06 Vishay / Sfernice	SFERNICE FIXED RESISTORS	0
RWST25168B1802JB00 Vishay / Sfernice	SFERNICE FIXED RESISTORS	0
RCECISOVS1802KB Vishay / Sfernice	MCB RESISTORS	0
RPS0250DH1001JBZA3 Vishay / Sfernice	SFERNICE FIXED RESISTORS	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.