Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
PCF0603R-332RBT1 TT Electronics	RES SMD 332 OHM 0.1% 1/16W 0603	1622
PFC-W1206LF-03-9310-B TT Electronics	RES SMD 931 OHM 0.1% 1/3W 1206	3213
PCF0402R-3K3BT1 TT Electronics	RES SMD 3.3K OHM 0.1% 1/16W 0402	1390
PFC-W0805LF-03-4992-B TT Electronics	RES SMD 49.9K OHM 0.1% 1/4W 0805	8264
PCF0805R-3K92BT1 TT Electronics	RES SMD 3.92KOHM 0.1% 1/10W 0805	2042
PCF0402R-270RBT1 TT Electronics	RES SMD 270 OHM 0.1% 1/16W 0402	1034
PCF0805PR-16KBT1 TT Electronics	RES SMD 16K OHM 0.1% 1/10W 0805	2653
PCF0402R-5K1BT1 TT Electronics	RES SMD 5.1K OHM 0.1% 1/16W 0402	5003
PCF0402PR-12KBT1 TT Electronics	RES SMD 12K OHM 0.1% 1/16W 0402	2674
PCF0805-12-75KBT1 TT Electronics	RES SMD 75K OHM 0.1% 1/10W 0805	1508
PCF0402R-7K5BT1 TT Electronics	RES SMD 7.5K OHM 0.1% 1/16W 0402	1755
PCF0402R-17K8BT1 TT Electronics	RES SMD 17.8KOHM 0.1% 1/16W 0402	2606
PCF0805PR-1K3BT1 TT Electronics	RES SMD 1.3K OHM 0.1% 1/10W 0805	4534
PCF0805R-243KBT1 TT Electronics	RES SMD 243K OHM 0.1% 1/10W 0805	46097
PFC-W1206LF-03-1800-B TT Electronics	RES SMD 180 OHM 0.1% 1/3W 1206	3359
PCF0402R-13KBT1 TT Electronics	RES SMD 13K OHM 0.1% 1/16W 0402	2761
PFC-W1206LF-03-2210-B TT Electronics	RES SMD 221 OHM 0.1% 1/3W 1206	1353
PCF0805PR-2K0BT1 TT Electronics	RES SMD 2K OHM 0.1% 1/10W 0805	2571
PCF0805R-4K02BT1 TT Electronics	RES SMD 4.02KOHM 0.1% 1/10W 0805	4327
PCF0805PR-2K2BT1 TT Electronics	RES SMD 2.2K OHM 0.1% 1/10W 0805	1378

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