UP0.4C-101-R Equivalent & Substitute Parts

Part Overview

The UP0.4C-101-R is a 100 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division, part of the UNI-PAC™ 0.4C series. This surface mount component is rated for 370 mA continuous current with a maximum DC resistance of 1.58Ohm and operates across the temperature range of -40°C to 85°C. The component is RoHS Compliant and carries an MSL rating of 1 (Unlimited). Substitute parts are identified when equivalent inductance values, current ratings, and mechanical compatibility requirements must be maintained while accommodating design flexibility, inventory availability, or performance optimization within specified electrical parameters.

Substiute Parts

UP0.4C-101-R

Eaton - Electronics DivisionIn Stock: 1106UP0.4C-101-R Datasheet

Current PartRFQ

P0770.104NLT

Pulse ElectronicsIn Stock: 5028P0770.104NLT Datasheet

SimilarRFQ

SDR0603-101KL

Bourns Inc.In Stock: 1159SDR0603-101KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UP0.4C-101-R are qualified based on the following criteria:

Primary Matching Parameters:

• Inductance value of 100 µH
• Inductance tolerance of ±20% or tighter
• Current rating sufficient for 370 mA operation
• DC resistance within acceptable limits for circuit performance
• Unshielded wirewound construction
• Surface mount packaging
• Physical dimensions compatible with 0.260" L x 0.175" W footprint
• RoHS compliance status

Acceptable Variation Ranges:

• Current rating: minimum 300 mA (substitute parts may have lower ratings if saturation current supports application requirements)
• DC resistance: lower values are acceptable; higher values require circuit analysis
• Operating temperature: minimum -40°C to 85°C overlap required
• Core material: ferrite drum core or equivalent wirewound construction

The two identified substitute parts meet these criteria with specific trade-offs in current handling capacity and DC resistance characteristics.

Parameter Comparison

Engineering Selection Recommendations

UP0.4C-101-R (Primary Component): The UP0.4C-101-R remains the baseline reference component with RoHS Compliant status and active product status. Selection is appropriate for applications requiring the specified 370 mA current rating and 1.58Ohm maximum DC resistance within the -40°C to 85°C operating window.

P0770.104NLT (Pulse Electronics) - Substitute Consideration: The P0770.104NLT provides identical footprint dimensions (0.260" L x 0.175" W) and height (0.115" max), enabling direct PCB layout compatibility. This substitute carries ROHS3 Compliant status and offers extended operating temperature range to 130°C. The 300 mA current rating is lower than the primary component; substitution is valid only when circuit design confirms that peak current demands do not exceed 300 mA continuous operation. The lower DC resistance of 1.27Ohm provides improved thermal performance. Tape & Reel packaging matches the primary component.

SDR0603-101KL (Bourns Inc.) - Substitute Consideration: The SDR0603-101KL delivers superior current handling with 380 mA rating and exceptional saturation current of 660 mA, supporting high-current transient conditions. DC resistance of 950 mOhm is significantly lower, reducing power dissipation. ROHS3 Compliant status and extended temperature range to 125°C are provided. Physical dimensions differ: 0.228" L x 0.228" W footprint and 0.154" maximum height require PCB layout verification. Tighter inductance tolerance of ±10% offers improved circuit performance predictability. Cut Tape and Digi-Reel® packaging differs from the primary component's Tape & Reel format.

All three components maintain RoHS compliance, MSL 1 (Unlimited) rating, and active product status, supporting long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can P0770.104NLT replace UP0.4C-101-R in all applications?

A: P0770.104NLT provides identical footprint and height compatibility. Substitution is valid when circuit design confirms continuous current operation does not exceed 300 mA. The saturation current of 310 mA limits transient current handling compared to the primary component's 350 mA saturation rating. Extended temperature range to 130°C supports broader thermal environments.

Q: What are the physical compatibility constraints for SDR0603-101KL?

A: SDR0603-101KL has a different footprint: 0.228" L x 0.228" W versus the primary component's 0.260" L x 0.175" W. Height is also greater at 0.154" maximum versus 0.115" maximum. PCB layout must be verified to confirm component placement clearance and trace routing compatibility. This substitute is not a direct drop-in replacement from a physical standpoint.

Q: How do DC resistance differences affect circuit performance?

A: Lower DC resistance reduces power dissipation and heat generation. SDR0603-101KL at 950 mOhm dissipates approximately 40% less power than UP0.4C-101-R at 1.58Ohm when operating at 370 mA. P0770.104NLT at 1.27Ohm provides intermediate performance. Circuit thermal analysis determines whether lower resistance is beneficial or if the primary component's resistance is acceptable.

Q: Are all three components suitable for high-temperature applications?

A: UP0.4C-101-R operates to 85°C maximum. P0770.104NLT extends to 130°C, and SDR0603-101KL to 125°C. For applications requiring sustained operation above 85°C, P0770.104NLT or SDR0603-101KL are required. Verify that saturation current and DC resistance remain within acceptable limits at elevated temperatures.

Q: What packaging format differences exist?

A: UP0.4C-101-R and P0770.104NLT are supplied in Tape & Reel (TR) format. SDR0603-101KL is supplied in Cut Tape (CT) and Digi-Reel® format. Procurement and assembly processes may require adjustment when switching between packaging formats.

Q: Does inductance tolerance affect substitution validity?

A: UP0.4C-101-R and P0770.104NLT both carry ±20% tolerance. SDR0603-101KL offers tighter ±10% tolerance, providing improved inductance value predictability. Circuits sensitive to inductance variation benefit from SDR0603-101KL's tighter tolerance, though all three components meet the ±20% specification range.

Q: Are all components RoHS compliant?

A: UP0.4C-101-R is RoHS Compliant. P0770.104NLT and SDR0603-101KL are ROHS3 Compliant, representing updated compliance standards. All three components meet RoHS requirements for new designs and supply chain continuity.