UP2.8B-101-R Equivalent & Substitute Parts

Part Overview

The UP2.8B-101-R is a 100 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division, part of the UNI-PAC™ 2.8 series. This surface mount component is designed for applications requiring fixed inductance with a current rating of 780 mA and maximum DC resistance of 622 mOhm. The part is currently active in production with RoHS compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified when design requirements permit tolerance of variations in current rating, DC resistance, or operating temperature range while maintaining the core electrical specification of 100 µH inductance at 100 kHz test frequency.

Substiute Parts

UP2.8B-101-R

Eaton - Electronics DivisionIn Stock: 1113UP2.8B-101-R Datasheet

Current PartRFQ

P0762.104NLT

Pulse ElectronicsIn Stock: 4991P0762.104NLT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UP2.8B-101-R is permissible when the following conditions are met:

Critical Parameters (Non-Negotiable):

• Inductance value: 100 µH
• Inductance tolerance: ±20%
• Inductance test frequency: 100 kHz
• Shielding configuration: Unshielded
• Mounting type: Surface Mount
• Package type: Nonstandard (physical dimensions must accommodate PCB layout)

Application-Dependent Parameters (Substitution Allowed with Design Verification):

• Current Rating: Substitute part must equal or exceed the application's required current
• Saturation Current (Isat): Substitute part must equal or exceed the application's maximum operating current
• DC Resistance (DCR): Substitute part DCR must be acceptable for the application's power dissipation budget
• Operating Temperature Range: Substitute part range must encompass the application's operating environment

Compliance Parameters:

• RoHS status must meet or exceed the original part's compliance level
• Moisture Sensitivity Level (MSL 1) is maintained across qualified substitutes

The P0762.104NLT from Pulse Electronics qualifies as a substitute based on matching inductance, tolerance, shielding, mounting type, and package category. However, the lower current rating (600 mA vs. 780 mA) and higher DCR (840 mOhm vs. 622 mOhm) restrict its use to applications with reduced current requirements and acceptable power dissipation margins.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: The UP2.8B-101-R remains the preferred choice for applications requiring the full 780 mA current rating and lower DC resistance profile (622 mOhm). This part is actively manufactured by Eaton and maintains RoHS compliance with unlimited MSL rating.

Substitute Part Selection: The P0762.104NLT from Pulse Electronics is suitable as a substitute when all of the following conditions are satisfied:

1. Application current requirement does not exceed 600 mA continuous operation
2. Application saturation margin requirement does not exceed 700 mA
3. Power dissipation budget accommodates the additional 218 mOhm DC resistance
4. PCB layout clearance accommodates the 0.20 mm additional height (3.00 mm vs. 2.80 mm seated height)
5. Operating temperature environment remains within -40°C to 130°C range
6. ROHS3 compliance meets or exceeds regulatory requirements

Both parts maintain identical inductance specifications (100 µH ±20% at 100 kHz), unshielded configuration, surface mount packaging, and unlimited moisture sensitivity rating. Both are actively produced and available in volume.

Compliance Consideration: The P0762.104NLT carries ROHS3 compliance status, which exceeds the RoHS Compliant designation of the UP2.8B-101-R. This represents an improvement in regulatory alignment for applications subject to ROHS3 requirements.

Frequently Asked Questions (FAQ)

Q: Can the P0762.104NLT be used as a direct replacement for the UP2.8B-101-R in all applications?

A: No. The P0762.104NLT has a lower current rating (600 mA vs. 780 mA) and higher DC resistance (840 mOhm vs. 622 mOhm). It is suitable only for applications where the circuit current does not exceed 600 mA and where the additional power dissipation from higher resistance is acceptable.

Q: What is the significance of the 218 mOhm difference in DC resistance?

A: DC resistance directly affects power dissipation in the inductor. At 600 mA, the UP2.8B-101-R dissipates approximately 223 mW, while the P0762.104NLT dissipates approximately 302 mW. Applications with thermal constraints must account for this 79 mW increase.

Q: Are the physical dimensions compatible for PCB layout?

A: The length and width dimensions are essentially identical (within 0.05 mm). However, the seated height differs by 0.20 mm (2.80 mm vs. 3.00 mm). PCB layout must verify that the additional height does not violate component clearance requirements or create interference with adjacent components or enclosure constraints.

Q: Does the extended operating temperature range of the P0762.104NLT provide an advantage?

A: The P0762.104NLT operates to 130°C versus 85°C for the UP2.8B-101-R. This extended range is beneficial only for applications requiring operation above 85°C. For standard applications within -40°C to 85°C, both parts are equivalent in this parameter.

Q: What is the difference between RoHS Compliant and ROHS3 Compliant?

A: ROHS3 represents a more recent revision of the RoHS directive with updated substance restrictions. The P0762.104NLT's ROHS3 compliance indicates alignment with current regulatory standards and may be required for applications subject to the latest environmental regulations.

Q: Can saturation current (Isat) differences affect circuit performance?

A: Yes. Saturation current defines the maximum current at which the inductor maintains its specified inductance value. The UP2.8B-101-R saturates at 840 mA, while the P0762.104NLT saturates at 700 mA. Applications operating near saturation limits must use the part with adequate saturation margin for the intended current profile.

Q: Are both parts available in equivalent quantities?

A: Inventory levels differ. The UP2.8B-101-R has 1100 pieces in stock, while the P0762.104NLT has 4945 pieces available. Substitute selection may be influenced by supply chain requirements and lead time considerations.

Q: What is the inductance test frequency, and why does it matter?

A: Both parts are tested at 100 kHz. Inductance values can vary with frequency due to core material properties. The 100 kHz test frequency ensures that both parts are characterized under identical measurement conditions, making the 100 µH specification directly comparable.