MCR03EZPFX4990 ROHM Semiconductor Resistor (Resistor Chip) In Stock
ROHM MCR03EZPFX4990 is a 499Ω, ±1% tolerance, 0.1W thick-film chip resistor in an 0603 (1.6mm x 0.8mm) surface-mount package with ±100 ppm/°C temperature coefficient, offering stable precision resistance for signal conditioning, voltage dividing, and filtering in compact electronic assemblies.
- Manufacturer
- ROHM Semiconductor
- Package
- Resistor Chip
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- MCR03EZPFX4990 Datasheet PDF
- Category
- Resistor
- Price
- From $0.0030(MOQ 1)
- Temp Range
- -55.0°C to 155.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCR03EZPFX4990?
- 499Ω ±1% tolerance provides precision resistance matching for voltage dividers, feedback networks, and current-sense circuits
- ±100 ppm/°C temperature coefficient ensures resistance stability across a wide operating temperature range in industrial and automotive environments
- 0603 (1.6mm x 0.8mm x 0.45mm) chip package minimizes PCB footprint while supporting automated high-speed SMT pick-and-place assembly
- RoHS-compliant lead-free (e3) construction meets REACH and global environmental regulatory requirements for worldwide deployment
What is MCR03EZPFX4990 used for?
The ROHM MCR03EZPFX4990 is widely used in precision voltage divider networks, op-amp feedback resistors, and current-limiting circuits in smartphones, IoT sensors, and industrial control modules where accurate 499Ω resistance is required. Its ±1% tolerance and ±100 ppm/°C temperature coefficient make it suitable for signal conditioning stages in analog-to-digital converter (ADC) front ends and sensor interface circuits where resistance drift directly affects measurement accuracy. The compact 0603 package integrates seamlessly into high-density PCB layouts found in wearables, medical devices, and consumer electronics.
What are the specifications of MCR03EZPFX4990?
| 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 | 499Ω |
| 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 |
Where can I find the MCR03EZPFX4990 datasheet?
MCR03EZPFX4990 Datasheet DownloadOfficial datasheet from ROHM Semiconductor
What are equivalent replacements for MCR03EZPFX4990?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the ±1% tolerance of MCR03EZPFX4990 affect precision voltage divider accuracy across temperature?
At ±1% tolerance, the MCR03EZPFX4990 introduces a worst-case initial resistance error of ±4.99Ω on its 499Ω nominal value. Combined with the ±100 ppm/°C temperature coefficient, a 50°C temperature rise adds a further ±0.5% resistance change (±2.5Ω), giving a total worst-case error of about ±1.5% over the operating range. For a 3.3V to 1.8V voltage divider used as an ADC reference, this translates to a maximum output voltage error of approximately ±24 mV, which is acceptable for 8-bit to 10-bit ADC applications but may require calibration for 12-bit or higher precision systems.
In an 0603 SMT layout, how does the MCR03EZPFX4990 footprint compare to 0402 alternatives for a space-constrained IoT board?
The MCR03EZPFX4990 uses the 0603 package measuring 1.6mm x 0.8mm x 0.45mm, which has a pad footprint roughly 2.5 times larger than the 0402 (1.0mm x 0.5mm) package. While the 0402 saves space, the 0603 is generally easier to hand-solder during prototype stages and less prone to tombstoning defects on automated reflow lines, making it a better choice when the PCB has sufficient room and manufacturing yield is prioritized over absolute miniaturization.
For a current-sense application in an industrial motor controller, does the 0.1W power rating of MCR03EZPFX4990 set practical current limits?
Yes — the 0.1W power rating of the MCR03EZPFX4990 limits the maximum continuous current through the 499Ω resistor to approximately 14.2 mA (I = √(P/R) = √(0.1/499) ≈ 0.0142A) before the resistor exceeds its rated dissipation. For motor controller current sensing at higher currents of 1A or more, a lower-value current-sense resistor (typically 0.01Ω to 0.1Ω) rated at 0.5W to 2W would be more appropriate, with the MCR03EZPFX4990 better suited as a signal-path resistor in the amplifier feedback network rather than in the high-current path.
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Why Buy from FindMyChip
About ROHM Semiconductor
ROHM Semiconductor is a leading electronic component manufacturer. FindMyChip sources ROHM Semiconductor ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.0180 | $0.02 |
| 279+ | $0.0120 | $3.35 |
| 1668+ | $0.0060 | $10.01 |
| 5000+ | $0.0030 | $14.80 |
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