Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
ESR03EZPJ564 ROHM Semiconductor	RES SMD 560K OHM 5% 1/4W 0603	8523
KTR25JZPJ241 ROHM Semiconductor	RES SMD 240 OHM 5% 1/3W 1210	0
ESR10EZPF2R15 ROHM Semiconductor	RES SMD 2.15 OHM 1% 0.4W 0805	0
KTR25JZPF1502 ROHM Semiconductor	RES SMD 15K OHM 1% 1/3W 1210	2057
KTR18EZPF2321 ROHM Semiconductor	RES SMD 2.32K OHM 1% 1/4W 1206	9679
ESR25JZPF6200 ROHM Semiconductor	RES SMD 620 OHM 1% 2/3W 1210	0
KTR10EZPF7871 ROHM Semiconductor	RES SMD 7.87K OHM 1% 1/8W 0805	9520
TRR03EZPF5600 ROHM Semiconductor	RES SMD 560 OHM 1% 1/10W 0603	0
ESR10EZPF27R0 ROHM Semiconductor	RES SMD 27 OHM 1% 0.4W 0805	13787
ESR03EZPJ271 ROHM Semiconductor	RES SMD 270 OHM 5% 1/4W 0603	598
MCR03ERTF3323 ROHM Semiconductor	RES SMD 332K OHM 1% 1/10W 0603	1089
MCR18ERTF1152 ROHM Semiconductor	RES SMD 11.5K OHM 1% 1/4W 1206	3565
ESR03EZPF3603 ROHM Semiconductor	RES SMD 360K OHM 1% 1/4W 0603	0
MCR18ERTF4420 ROHM Semiconductor	RES SMD 442 OHM 1% 1/4W 1206	3830
KTR18EZPF2261 ROHM Semiconductor	RES SMD 2.26K OHM 1% 1/4W 1206	8222
KTR18EZPJ152 ROHM Semiconductor	RES SMD 1.5K OHM 5% 1/4W 1206	0
KTR25JZPF2701 ROHM Semiconductor	RES SMD 2.7K OHM 1% 1/3W 1210	11246
KTR10EZPF1472 ROHM Semiconductor	RES SMD 14.7K OHM 1% 1/8W 0805	8874
TRR01MZPF4992 ROHM Semiconductor	RES SMD 49.9K OHM 1% 1/16W 0402	9321
PMR25HZPJV2L0 ROHM Semiconductor	RES 0.002 OHM 5% 1W 1210	108

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