UP3B-150-R Equivalent & Substitute Parts

Part Overview

The UP3B-150-R is a 15 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division, rated for 3.9 A continuous current. This surface mount component is designed for applications requiring fixed inductance in compact form factors. The part is currently active in production with RoHS compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical and mechanical parameters are available from alternative manufacturers, enabling procurement flexibility and supply chain continuity.

Substiute Parts

UP3B-150-R

Eaton - Electronics DivisionIn Stock: 909UP3B-150-R Datasheet

Current PartRFQ

SDR1806-150ML

Bourns Inc.In Stock: 1398SDR1806-150ML Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UP3B-150-R is determined by the following critical parameters:

Electrical Equivalence Criteria:

• Inductance value: 15 µH (fixed requirement)
• Inductance tolerance: ±20% (matching specification)
• Current rating: minimum 3.9 A (substitute must meet or exceed)
• DC resistance: maximum 31.7 mOhm (substitute must not exceed)
• Core material: Ferrite (unshielded drum core type)

Mechanical Compatibility Criteria:

• Mounting type: Surface Mount
• Package classification: Nonstandard (drum core form factor)
• Inductance test frequency: 100 kHz

Compliance Requirements:

• RoHS compliance status (RoHS Compliant or ROHS3 Compliant acceptable)
• Moisture sensitivity level: MSL 1 (Unlimited)

The SDR1806-150ML from Bourns Inc. meets all substitution criteria with equivalent inductance, tolerance, and core material specifications. The substitute part exceeds the current rating requirement (4.3 A vs. 3.9 A) and maintains DC resistance within acceptable limits (35 mOhm vs. 31.7 mOhm maximum).

Parameter Comparison

Engineering Selection Recommendations

UP3B-150-R Selection Basis:

• Primary choice when Eaton component availability and supply chain continuity are prioritized
• Active product status with established procurement channels
• RoHS Compliant certification meets standard environmental requirements
• Specified current rating of 3.9 A is adequate for applications with defined load requirements

SDR1806-150ML Selection Basis:

• Suitable alternative when enhanced performance margins are beneficial
• Higher current rating (4.3 A) and saturation current (8.0 A) provide operational headroom
• Extended operating temperature range (-40 to 125°C) accommodates wider thermal environments
• ROHS3 Compliant status meets current regulatory standards
• Higher inventory availability (1352 Pcs vs. 888 Pcs) supports expedited procurement

Both parts maintain equivalent inductance specifications, tolerance bands, and core material properties. Selection between UP3B-150-R and SDR1806-150ML depends on supply availability, thermal requirements, and current margin requirements for the specific application circuit.

Frequently Asked Questions (FAQ)

Q: Can SDR1806-150ML directly replace UP3B-150-R in existing designs?

A: Yes. Both inductors share identical inductance (15 µH), tolerance (±20%), core material (ferrite), and mounting type (surface mount). The SDR1806-150ML meets or exceeds all electrical parameters of the UP3B-150-R, including current rating and saturation specifications.

Q: What is the difference in DC resistance between these parts?

A: The UP3B-150-R specifies 31.7 mOhm maximum DC resistance, while the SDR1806-150ML specifies 35 mOhm maximum. This 3.3 mOhm difference is within acceptable substitution limits for most applications. Verify DC resistance impact on circuit thermal performance if critical to your design.

Q: Are the physical dimensions compatible?

A: Both parts are classified as nonstandard package types with similar form factors. UP3B-150-R dimensions are 19.30mm L × 13.21mm W × 6.80mm H (max). SDR1806-150ML dimensions are 18.30mm L × 14.00mm W × 6.90mm H (max). Verify PCB layout and component placement clearances before substitution.

Q: What is the temperature operating range difference?

A: UP3B-150-R operates from -40°C to 85°C. SDR1806-150ML operates from -40°C to 125°C. The SDR1806-150ML provides 40°C additional high-temperature capability, beneficial for applications in elevated thermal environments.

Q: Do both parts meet RoHS compliance requirements?

A: Yes. UP3B-150-R is RoHS Compliant. SDR1806-150ML is ROHS3 Compliant. Both certifications satisfy current environmental and regulatory standards for electronic component manufacturing and use.

Q: What is the moisture sensitivity level for both inductors?

A: Both UP3B-150-R and SDR1806-150ML are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage, handling, or assembly processes.

Q: Which part should be selected for new designs?

A: For new designs, either part is acceptable based on supply chain strategy and performance requirements. SDR1806-150ML offers higher current margins and extended temperature range. UP3B-150-R maintains Eaton supply chain continuity. Verify component availability and lead times with your supplier.