Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
TFCR0805-10W-E-4992BT Venkel LTD	RES 49.9K OHM 0.1% 1/10W 0805	0
CR1206-8W-2743FT Venkel LTD	RES 274K OHM 1% 1/8W 1206	10000
CR1210-4W-183JT Venkel LTD	RES 18K OHM 5% 1/4W 1210	0
TFCR0603-10W-C-3300FT Venkel LTD	RES 330 OHM 1% 1/10W 0603	0
TFCR1210-4W-E-1000FT Venkel LTD	RES 100 OHM 1% 1/4W 1210	0
TFCR0603-10W-C-10R0FT Venkel LTD	RES 10 OHM 1% 1/10W 0603	5000
CR0805-8W-8661FT Venkel LTD	RES 8.66K OHM 1% 1/8W 0805	15400
CR0805-8W-9761FT Venkel LTD	RES 9.76K OHM 1% 1/8W 0805	260000
TFCR1206-8W-C-1002BT Venkel LTD	RES 10K OHM 0.1% 1/8W 1206	5000
TFCR1206-4W-E-4990BT-1K Venkel LTD	RES 499 OHM 0.1% 1/4W 1206	0
CR1206-8W-9311FT Venkel LTD	RES 9.31K OHM 1% 1/8W 1206	10000
CR0805-8W-1072FT Venkel LTD	RES 10.7K OHM 1% 1/8W 0805	0
CR1206-4W-6980FT Venkel LTD	RES 698 OHM 1% 1/4W 1206	0
CR1206-8W-430JT Venkel LTD	RES 43 OHM 5% 1/8W 1206	10000
TFCR0805-10W-E-1102BT Venkel LTD	RES 11K OHM 0.1% 1/10W 0805	0
CR1206-8W-1131FT Venkel LTD	RES 1.13K OHM 1% 1/8W 1206	5000
TFCR0603-16W-K-2003FT Venkel LTD	RES 200K OHM 1% 1/16W 0603	15000
TFCR1206-8W-E-1241BT Venkel LTD	RES 1.24K OHM 0.1% 1/8W 1206	5000
CR0805-8W-3R83FT Venkel LTD	RES 3.83 OHM 1% 1/8W 0805	95000
LCR2512-R023FT Venkel LTD	RES 23M OHM 1% 2W 2512	24000

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