Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
S2-1KF2 Riedon	RES SMD 1K OHM 1% 1W 2615	0
S2-1R21F1 Riedon	RES SMD 1.21 OHM 1% 1W 2615	0
HVS0805-22MJ1 Riedon	RES SMD 22M OHM 5% 1/8W 0805	0
S5-22RF1 Riedon	RES SMD 22 OHM 1% 4W 8230	3178
PFC10-1K8F1 Riedon	RES SMD 1.8K OHM 1% 25W PFC10	0
PFC10-3R3F1 Riedon	RES SMD 3.3 OHM 1% 25W PFC10	0
S5-0R005J8 Riedon	RES 0.005 OHM 5% 4W 8230	0
S5-0R1F2 Riedon	RES 0.1 OHM 1% 4W 8230	0
HVC2512H-330MK8 Riedon	RES SMD 330M OHM 10% 1W 2512	0
PFS35-82RF1 Riedon	RES SMD 82 OHM 1% 35W TO263 DPAK	0
PFC10-3KF1 Riedon	RES SMD 3K OHM 1% 25W PFC10	0
NPS2T-1K5F1 Riedon	RES SMD 1.5K OHM 1% 25W TO126	0
S4-681RF1 Riedon	RES SMD 681 OHM 1% 2W 4525	0
S5-47KJ1 Riedon	RES SMD 47K OHM 5% 4W 8230	0
PFS35-30KF1 Riedon	RES SMD 30KOHM 1% 35W TO263 DPAK	0
PFS35-39KF1 Riedon	RES SMD 39KOHM 1% 35W TO263 DPAK	0
ASC0402-100KF1 Riedon	RES 100 KOHM 1% 1/16W 0402	2173
S2-10RF2 Riedon	RES SMD 10 OHM 1% 1W 2615	5081
S3-6K8F1 Riedon	RES SMD 6.8K OHM 1% 3W 6327	0
S2-0R039F8 Riedon	RES 0.039 OHM 1% 1W 2615	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