UP2.8B-151-R Equivalent & Substitute Parts

Part Overview

The UP2.8B-151-R is a 150 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division, part of the UNI-PAC™ 2.8 series. This surface mount component is rated for 620 mA continuous current with a maximum DC resistance of 971 mOhm and operates across the temperature range of -40°C to 85°C. The part is RoHS Compliant and carries an MSL rating of 1 (Unlimited). As an active product with 1085 pieces in stock, substitute components may be required due to supply constraints, design optimization, or application-specific performance requirements.

Substiute Parts

UP2.8B-151-R

Eaton - Electronics DivisionIn Stock: 1187UP2.8B-151-R Datasheet

Current PartRFQ

P0762.154NLT

Pulse ElectronicsIn Stock: 3923P0762.154NLT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UP2.8B-151-R is determined by strict equivalence across the following critical parameters:

Inductance Value: 150 µH with ±20% tolerance is the primary functional requirement. Substitute parts must match this specification exactly.

Current Rating & Saturation: The main part supports 620 mA continuous current with 740 mA saturation current. Substitute components must meet or exceed these current handling requirements to ensure safe operation without thermal stress or core saturation.

DC Resistance (DCR): Maximum DCR of 971 mOhm directly impacts power dissipation and thermal performance. Substitute parts with higher DCR values will increase losses and heat generation.

Core Configuration: Unshielded wirewound construction with ferrite core material defines the electromagnetic behavior. Substitutes must maintain this configuration to preserve circuit performance.

Mounting & Package: Surface mount nonstandard package with dimensions 12.90 × 9.40 × 2.80 mm (L × W × H) ensures PCB compatibility. Substitute parts must fit within these spatial constraints.

Environmental Compliance: RoHS Compliance and MSL 1 rating are mandatory for supply chain and manufacturing process compatibility.

Operating Temperature: The -40°C to 85°C range defines the thermal operating envelope. Substitute parts must support this range or a wider range to maintain reliability.

The P0762.154NLT from Pulse Electronics qualifies as a direct substitute based on matching inductance value, unshielded wirewound construction, surface mount configuration, and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (UP2.8B-151-R): Select the Eaton UP2.8B-151-R when the application requires the specified 620 mA continuous current rating and 740 mA saturation current. The lower DCR of 971 mOhm minimizes power dissipation and thermal effects. This part is active and maintains full inventory availability.

Substitute Selection (P0762.154NLT): The Pulse Electronics P0762.154NLT serves as an equivalent substitute when supply of the primary part is constrained. This substitute maintains the 150 µH inductance value, unshielded wirewound configuration, and surface mount package. However, the following application constraints apply:

• Current rating is reduced to 500 mA continuous and 600 mA saturation. Applications operating above these thresholds require the primary part.
• DC resistance is increased to 1.2 Ohm maximum, resulting in approximately 23% higher power dissipation at rated current. Thermal analysis must confirm acceptable operating temperatures.
• Physical height increases by 0.20 mm (3.00 mm vs. 2.80 mm). PCB clearance must be verified for confined spaces.
• Operating temperature range extends to 130°C, providing thermal margin for high-temperature applications.

Both parts carry RoHS compliance and MSL 1 ratings, ensuring supply chain and manufacturing process compatibility. Selection between these parts depends on current requirements, thermal budget, and physical space constraints specific to the application.

Frequently Asked Questions (FAQ)

Q: Can the P0762.154NLT directly replace the UP2.8B-151-R in all applications?

A: Direct replacement is possible only when the application current does not exceed 500 mA continuous or 600 mA peak. Applications requiring the full 620 mA rating of the primary part must use the UP2.8B-151-R. The higher DCR of the substitute (1.2 Ohm vs. 971 mOhm) increases power dissipation and must be evaluated against thermal constraints.

Q: What is the impact of the higher DC resistance in the substitute part?

A: At 500 mA, the P0762.154NLT dissipates approximately 300 mW (0.5 A × 1.2 Ohm × 0.5 A), compared to approximately 243 mW for the primary part (0.62 A × 0.971 Ohm × 0.62 A). This 23% increase in power dissipation raises component temperature and may require additional thermal management or derating in thermally constrained designs.

Q: Are the physical dimensions compatible?

A: The length and width are nearly identical (12.90 vs. 12.95 mm length; 9.40 mm width for both). The height difference of 0.20 mm (2.80 vs. 3.00 mm) is negligible for most applications but must be verified in designs with tight vertical clearance, such as stacked components or confined enclosures.

Q: Do both parts meet current compliance standards?

A: Yes. The UP2.8B-151-R is RoHS Compliant, and the P0762.154NLT is ROHS3 Compliant. Both carry MSL 1 (Unlimited) ratings and are suitable for standard manufacturing and supply chain processes. The substitute meets the current regulatory standard.

Q: What is the inductance tolerance, and does it affect substitution?

A: Both parts carry ±20% inductance tolerance at 100 kHz test frequency. This tolerance is identical and does not differentiate substitution suitability. Circuit designs must account for this tolerance range in both cases.

Q: Can the substitute part be used in high-temperature applications?

A: The P0762.154NLT supports -40°C to 130°C operation, compared to -40°C to 85°C for the primary part. The substitute provides a 45°C thermal margin for high-temperature environments. However, the increased DCR generates additional heat, which may offset this advantage in thermally constrained designs.

Q: Are there any electromagnetic performance differences between the parts?

A: Both parts are unshielded wirewound inductors with 150 µH inductance. The primary part uses a drum core ferrite construction, while the substitute core material is not specified. Electromagnetic characteristics such as Q factor and self-resonant frequency are not provided for either part. Applications sensitive to these parameters require direct measurement or manufacturer consultation.