MCR03EZPFX4991 ROHM Semiconductor Resistor (Resistor Chip) In Stock
MCR03EZPFX4991 is a 4.99 kΩ thick-film chip resistor in 0603 case by ROHM MCR series with 1% tolerance and 0.1 W power rating. Key specs: ±100 ppm/°C temperature coefficient, 1.6 mm × 0.8 mm SMT package, RoHS compliant. Available from stock with worldwide shipping.
- Manufacturer
- ROHM Semiconductor
- Package
- Resistor Chip
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- MCR03EZPFX4991 Datasheet PDF
- Category
- Resistor
- Temp Range
- -55.0°C to 155.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 4.99 kΩ precision value with ±1% tolerance enables accurate voltage-divider, pull-up, and feedback network designs
- ±100 ppm/°C TCR maintains resistance stability across industrial temperature ranges from -55 °C to +155 °C
- 0.1 W 0603 SMT package measuring 1.6 × 0.8 × 0.45 mm suits ultra-compact high-density PCB layouts
- Thick-film rectangular construction provides robust mechanical stability and consistent solderability in reflow assembly
- Pb-free, REACH-compliant, JESD-609 e3 rated for lead-free solder processes and global regulatory compliance
Applications
The ROHM MCR03EZPFX4991 4.99 kΩ 0603 resistor is widely used in precision voltage-divider networks, pull-up or pull-down circuits for microcontroller I/O pins, and feedback resistor networks in op-amp and LDO regulator designs requiring accurate 1% tolerance. Its low 0.1 W rating and compact 0603 footprint make it ideal for battery-powered IoT sensors, wearable electronics, and portable instrumentation where board space and power dissipation are tightly constrained. The ±100 ppm/°C TCR also suits analog signal conditioning circuits in industrial sensors and data acquisition modules operating over wide temperature ranges.
Specifications
| Pbfree Code | Yes |
| Reach Compliance Code | Compliant |
| YTEOL | 9 |
| Construction | Rectangular |
| JESD-609 Code | e3 |
| Mounting Feature | SURFACE MOUNT |
| Package Height | 0.45mm |
| Package Length | 1.6mm |
| Package Shape | RECTANGULAR PACKAGE |
| Package Style | SMT |
| Package Width | 0.8mm |
| Packing Method | TR, Paper, 7 Inch |
| Rated Power Dissipation (P) | 0.1W |
| Rated Temperature | 70°C |
| Resistance | 4990Ω |
| Resistor Type | FIXED RESISTOR |
| Size Code | 0603 |
| Surface Mount | YES |
| Technology | METAL GLAZE/THICK FILM |
| Temperature Coefficient | 100ppm/°C |
| Terminal Finish | Tin (Sn) - with Nickel (Ni) barrier |
| Terminal Shape | WRAPAROUND |
| Tolerance | 1% |
| Working Voltage | 50V |
| Package | Resistor Chip |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8533.21.00.30 |
| Country of Origin | Philippines, Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How precise is MCR03EZPFX4991 resistance and how does it drift with temperature?
The MCR03EZPFX4991 has a resistance value of 4.99 kΩ with ±1% initial tolerance, meaning the actual resistance falls between 4.940 kΩ and 5.040 kΩ at room temperature. Its ±100 ppm/°C TCR adds a maximum drift of ±0.1 Ω per degree Celsius per kilohm, totalling approximately ±50 Ω over a 100 °C temperature range — suitable for most analog signal conditioning and voltage-divider applications in industrial equipment.
What power can MCR03EZPFX4991 safely dissipate and what limits it?
The MCR03EZPFX4991 is rated for 0.1 W continuous power dissipation at 70 °C ambient temperature, derated linearly to zero at its maximum temperature. At 4.99 kΩ, this corresponds to a maximum safe continuous voltage of approximately √(0.1 W × 4990 Ω) ≈ 22 V across the resistor, limiting its use in high-voltage pull-up applications above that threshold.
Is MCR03EZPFX4991 suitable for precision voltage-divider circuits in a 3.3 V ADC reference application?
Yes, with its 4.99 kΩ ±1% value and ±100 ppm/°C TCR, the MCR03EZPFX4991 is well suited for paired voltage-divider networks used to scale a 5 V signal to a 3.3 V ADC input. Two matched 4.99 kΩ resistors from the same reel minimize ratio error to well below 0.1%, keeping ADC measurement errors below 1 LSB on a 12-bit converter.
Which solder process and PCB footprint standard does MCR03EZPFX4991 require?
The MCR03EZPFX4991 uses a standard 0603 SMT footprint with a body measuring 1.6 mm × 0.8 mm × 0.45 mm height, conforming to the IPC-7351 0603 land pattern. It is rated JESD-609 e3 (Pb-free) and qualified for SAC305 lead-free reflow soldering at peak temperatures up to 260 °C, fully compatible with automated SMT assembly in consumer and industrial PCB production.
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