MC0125W12061121R MULTICOMP Resistor (Resistor Chip) In Stock
MC0125W12061121R is a 121 ohm thick film chip resistor in a 1206 SMT package by MULTICOMP. Key specs: 1% tolerance, 0.125 W power rating, tape-and-reel packaging. From competitive pricing, in stock with worldwide shipping.
- Manufacturer
- MULTICOMP
- Package
- Resistor Chip
- Pin Count
- 2
- Lifecycle
- OBSOLETE
- Datasheet
- MC0125W12061121R 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
What are the key features of MC0125W12061121R?
- 121 ohm resistance with 1% tolerance for precise voltage divider, pull-up, and current-limiting circuit designs
- 0.125 W (1/8 W) power rating in a 1206 package (3.1 mm x 1.55 mm) for space-efficient and easy-to-inspect PCB layouts
- Thick film construction delivers stable resistance over temperature and extended operating life for commercial and industrial use
- Tape-and-reel (TR) packaging enables high-speed automated SMT pick-and-place assembly for high-volume production efficiency
What is MC0125W12061121R used for?
The MC0125W12061121R is used in general-purpose signal conditioning, current limiting, pull-up and pull-down networks, and precision voltage divider circuits across consumer electronics, industrial control, and telecommunications equipment. Its 1% tolerance provides accurate resistance values for feedback networks, sensor interface biasing, and ADC reference circuits where standard 5% resistors are insufficient. The 1206 package offers easy hand-soldering for prototyping while maintaining full compatibility with automated SMT assembly processes.
What are the specifications of MC0125W12061121R?
| Reach Compliance Code | Unknown |
| YTEOL | 0 |
| Construction | Rectangular |
| JESD-609 Code | e3 |
| Mounting Feature | SURFACE MOUNT |
| Package Height | 0.55mm |
| Package Length | 3.1mm |
| Package Style | SMT |
| Package Width | 1.55mm |
| Packing Method | TR |
| Rated Power Dissipation (P) | 0.125W |
| Rated Temperature | 70°C |
| Resistance | 121Ω |
| Resistor Type | FIXED RESISTOR |
| Size Code | 1206 |
| 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 | 200V |
| Package | Resistor Chip |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8533.21.00.30 |
Where can I find the MC0125W12061121R datasheet?
MC0125W12061121R Datasheet DownloadOfficial datasheet from MULTICOMP
What are equivalent replacements for MC0125W12061121R?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What resistance and tolerance does the MC0125W12061121R provide for precision divider and feedback designs?
The MC0125W12061121R provides 121 ohm resistance with 1% tolerance, keeping actual resistance within approximately 1.21 ohm of the nominal value. This precision suits accurate voltage dividers, op-amp feedback networks, current-sense circuits, and biasing applications where tighter control than standard 5% resistors is required in signal conditioning and embedded system designs.
How does the 0.125 W power rating of the MC0125W12061121R determine safe continuous current limits?
With a 0.125 W rating and 121 ohm resistance, the MC0125W12061121R safely handles up to approximately 32 mA of continuous current (I = sqrt(P/R)), making it appropriate for LED current limiting, microcontroller pull-up networks, and sensor biasing. Keeping current below 32 mA ensures the resistor stays within its 0.125 W thermal limit and maintains long-term reliability.
Why might engineers prefer the MC0125W12061121R's 1206 package over smaller resistor footprints for prototyping or harsh environments?
The 1206 package (3.1 mm x 1.55 mm) is significantly larger than 0402 or 0603 packages, making the MC0125W12061121R easier to hand-solder and inspect during prototyping. The larger pad area also improves solder joint robustness against thermal cycling from -55°C to +155°C, which is advantageous in industrial and automotive PCB designs subjected to wide ambient temperature swings.
For which LED current-limiting and interface termination applications is the MC0125W12061121R's 121 ohm value well-suited?
At 121 ohm, the MC0125W12061121R limits LED drive current to approximately 20 mA from a 5 V supply with a 2.5 V LED forward voltage (I = 2.5V/121ohm ≈ 20.7 mA), making it a practical choice for status indicator LEDs. It also suits RS-485 bus termination, transistor base limiting on 3.3 V logic, and analog sensor pull-up networks where 100 to 150 ohm values are specified.
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About MULTICOMP
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