Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
MC102827502JE Ohmite	RES SMD 75K OHM 5% 1.5W 5025	0
PCS2512FR0010ET Ohmite	2W 0.001 OHMS 1% 2512	1763
RW1S5CAR040J Ohmite	RES 0.04 OHM 5% 1.5W J LEAD	0
RC1R0EA68R0KET Ohmite	RES SMD 68 OHM 10% 1W J LEAD	0
RW2R0DAR010JET Ohmite	RES 0.01 OHM 5% 2W J LEAD	0
TDH50H1K00FE Ohmite	TO-263 HEATSINKABLE THICK FILM R	0
RW3R0DB1R00JET Ohmite	RES SMD 1 OHM 5% 3W J LEAD	1000
KDV06DR510ET Ohmite	RES 510M OHM 0.5% 1/5W 0603	4377
TDH35P2K50JE Ohmite	RES SMD 2.5K OHM 5% 35W D2PAK	105
HVC0402T1005JET Ohmite	RES SMD 10M OHM 5% 1/20W 0402	0
RW3R0DBR025JT Ohmite	RES 0.025 OHM 5% 3W J LEAD	0
KDV02FR120ET Ohmite	RESISTOR CURRENT SENSE	10000
MC102822502JE Ohmite	RES SMD 25K OHM 5% 1.5W 5025	0
RW5S0FAR100FET Ohmite	RES SMD 100M OHM 1% 5W L BEND	1200
RW1S0CKR010DET Ohmite	RES 0.01 OHM 0.5% 1W 4324	0
RW5S0FA10K0JET Ohmite	RES SMD 10K OHM 5% 5W L BEND	0
KDV04FR560ET Ohmite	RESISTOR CURRENT SENSE	9890
HVC0603T2505FET Ohmite	RES SMD 25M OHM 1% 1/10W 0603	2986
RW2R0DAR005JET Ohmite	RES 0.005 OHM 5% 2W J LEAD	0
LVK24R020FER Ohmite	RES 0.02 OHM 1% 1W 2412	0

Chip Resistors-Surface Mount

1. Overview

Surface Mount Chip Resistors (SMD Resistors) are passive electronic components designed to limit current flow and divide voltages in printed circuit boards (PCBs). As key elements in Surface Mount Technology (SMT), they enable high-density PCB layouts and automated manufacturing. Their miniaturized footprint and reliability make them essential for modern electronics, including smartphones, automotive systems, and industrial equipment.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Thick Film Resistors	Cost-effective, standard tolerance ( 1%-5%), power ratings up to 1W	Consumer electronics, power supplies
Thin Film Resistors	High precision ( 0.01%), low noise, stable temperature coefficients	Medical devices, precision instrumentation
Power Resistors	High power dissipation (up to 3W), robust thermal management	Motor drives, EV battery management systems
Network Resistors	Multiple resistors in single package, matched temperature coefficients	Digital circuits, memory modules
Wirewound Resistors	High inductance, precise low-resistance values	Audio amplifiers, industrial control systems

3. Structure and Composition

Typical SMD resistors consist of: - Ceramic substrate (Alumina, 96% Al₂O₃) - Resistive layer (Ruthenium oxide for thick film, Nichrome for thin film) - Termination electrodes (Ni/Sn or Ag/Pd metallization) - Protective coating (Epoxy or glass encapsulation) Standard packages follow EIA dimensions (e.g., 0402, 0603, 0805).

4. Key Technical Specifications

Parameter	Description	Importance
Resistance Range	1 to 10M (film), 0.1 to 100k (power)	Determines current control capability
Tolerance	0.01% (precision) to 5% (general)	Impacts circuit accuracy
Power Rating	0.05W to 3W @ 70 C	Defines thermal dissipation limits
TCR	5ppm/ C (thin film) to 200ppm/ C	Affects stability over temperature
Operating Temp	-55 C to +155 C	Defines environmental reliability
Voltage Coefficient	<0.1ppm/V	Ensures voltage stability

5. Application Fields

Consumer Electronics: Smartphones, wearables, IoT devices
Automotive: ADAS sensors, battery management systems, ECUs
Industrial: PLCs, motor drives, power converters
Telecom: 5G base stations, optical transceivers
Medical: Diagnostic equipment, implantable devices

6. Leading Manufacturers and Products

Manufacturer	Representative Series	Key Features
Yageo	CRCW Series	0.05W-1W, 0.1% tolerance
Vishay	CRCWE Series	Thin film, TCR 25ppm/ C
ROHM	MCR Series	Power resistors up to 2W
Ohmite	PWR Series	High-power 3W devices
Bourns	CRCU Series	Network resistors with 8-element arrays

7. Selection Recommendations

Consider: - Required resistance tolerance and power rating - Operating temperature range (automotive needs -40 C to +125 C) - Package size constraints (e.g., 0402 for mobile devices) - Long-term stability requirements (medical applications prefer thin film) - Cost vs. performance trade-offs (consumer vs. industrial use) Example: For smartphone power management, select 0603 thick film resistors with 1% tolerance and 125 C rating.

8. Industry Trends

Key trends include: - Miniaturization: Development of 0201 and 01005 packages - Higher precision: Sub-0.01% tolerance thin film resistors - Enhanced thermal management: New materials for power densities >1W/mm - Automotive growth: AEC-Q200 qualified parts for EVs - Smart manufacturing: AI-driven resistor selection tools - Sustainability: Lead-free and halogen-free material adoption