Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
HPTF1206-TN-4023BT-1K Venkel LTD	RES 402K OHM 0.1% 1/4W 1206	0
TFCR0805-10W-E-1152BT Venkel LTD	RES 11.5K OHM 0.1% 1/10W 0805	0
CR0805-10W-8661FT Venkel LTD	RES 8.66K OHM 1% 1/10W 0805	835
CR1206-8W-335JT Venkel LTD	RES 3.3M OHM 5% 1/8W 1206	0
TFCR0603-10W-E-3321BT Venkel LTD	RES 3.32K OHM 0.1% 1/10W 0603	0
TFCR0603-10W-K-10R0DT Venkel LTD	RES 10 OHM 0.5% 1/10W 0603	0
TFCR0603-10W-C-1781DT Venkel LTD	RES 1.78K OHM 0.5% 1/10W 0603	20000
CR0805-10W-7680FT Venkel LTD	RES 768 OHM 1% 1/10W 0805	125000
CR0805-8W-22R6FT Venkel LTD	RES 22.6 OHM 1% 1/8W 0805	60000
TFCR0603-10W-E-1303BT-1K Venkel LTD	RES 130K OHM 0.1% 1/10W 0603	1000
TFCR0805-10W-C-47R5DT Venkel LTD	RES 47.5 OHM 0.5% 1/10W 0805	0
TFCR0603-10W-C-4752FT-1K Venkel LTD	RES 47.5K OHM 1% 1/10W 0603	0
TFCR0805-10W-E-1001BT-1K Venkel LTD	RES 1K OHM 0.1% 1/10W 0805	0
CR1206-4W-9310FT Venkel LTD	RES 931 OHM 1% 1/4W 1206	0
LCR2512-1W-R200JT Venkel LTD	RES 200M OHM 5% 1W 2512	20000
LCR2512-R100FT Venkel LTD	RES 100M OHM 1% 2W 2512	832
CR1206-8W-1505FT Venkel LTD	RES 15M OHM 1% 1/8W 1206	0
TFCR0805-10W-E-25R5FT-1K Venkel LTD	RES 25.5 OHM 1% 1/10W 0805	0
TFCR0402-16W-C-2801BT Venkel LTD	RES 2.8K OHM 0.1% 1/16W 0402	10000
HPTF0603-SC-9102FT Venkel LTD	RES 91K OHM 1% 1/6W 0603	5000

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