UP2-4R7-R Equivalent & Substitute Parts

Part Overview

The UP2-4R7-R is a 4.7 µH unshielded wirewound inductor manufactured by Eaton - Electronics Division, part of the UNI-PAC™ 2 series. This surface mount component is rated for 5.7 A continuous current with a maximum DC resistance of 17.3 mOhm and operates at 100 kHz test frequency. The part is currently active in production with RoHS compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and compliance certifications align with application requirements.

Substiute Parts

UP2-4R7-R

Eaton - Electronics DivisionIn Stock: 1285UP2-4R7-R Datasheet

Current PartRFQ

B82476B1472M100

EPCOS - TDK ElectronicsIn Stock: 6443B82476B1472M100 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UP2-4R7-R are identified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Electrical Parameters:

• Inductance value must be 4.7 µH with tolerance of ±20% or tighter
• Current rating must be sufficient to handle 5.7 A continuous operation
• DC resistance must not exceed 17.3 mOhm to maintain thermal performance equivalence
• Saturation current (Isat) must support the application's peak current requirements

Mechanical Parameters:

• Surface mount configuration required for PCB assembly compatibility
• Nonstandard package dimensions must accommodate existing PCB footprint
• Unshielded construction to match electromagnetic characteristics

Compliance Parameters:

• RoHS compliance status must be equivalent or superior
• Moisture sensitivity level must be MSL 1 or better
• Active product status ensures ongoing availability and support

The B82476B1472M100 from EPCOS - TDK Electronics meets these criteria as a qualified substitute.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: UP2-4R7-R (Eaton)

The UP2-4R7-R remains the primary choice when the original specification is required. This part is actively manufactured, RoHS compliant, and carries unlimited MSL rating for flexible handling and storage. The 5.7 A continuous current rating provides full margin for applications requiring maximum current capacity.

Substitute Selection: B82476B1472M100 (EPCOS - TDK)

The B82476B1472M100 qualifies as an equivalent substitute when the following conditions are met:

1. Current Requirement: Application continuous current does not exceed 5.3 A. The 0.4 A reduction in continuous rating must be evaluated against actual circuit operating conditions.

2. Thermal Performance: The lower DC resistance (16.5 mOhm vs. 17.3 mOhm) provides improved thermal characteristics, reducing power dissipation by approximately 4.6%.

3. Saturation Margin: The higher saturation current (5.4 A vs. 4.2 A) provides superior performance margin against magnetic saturation, particularly beneficial in transient current conditions.

4. Physical Compatibility: PCB footprint must accommodate the slightly smaller dimensions (0.510" L x 0.370" W x 0.200" H). Verify that the reduced length and height do not conflict with existing component placement or clearance requirements.

5. Compliance Requirements: The B82476B1472M100 meets or exceeds all compliance standards. ROHS3 compliance and AEC-Q200 automotive qualification provide additional assurance for regulated applications.

6. Availability: Both parts are actively produced with substantial inventory levels (1183 pcs for UP2-4R7-R; 6405 pcs for B82476B1472M100), ensuring supply chain reliability.

Selection Decision Matrix:

• Use UP2-4R7-R when maximum continuous current capacity (5.7 A) is required or when exact original dimensions are mandated by PCB layout constraints.
• Use B82476B1472M100 when application current does not exceed 5.3 A, improved thermal performance is beneficial, and physical dimensions are compatible with PCB design.

Frequently Asked Questions (FAQ)

Q: Can the B82476B1472M100 be used as a direct replacement for the UP2-4R7-R?

A: The B82476B1472M100 is electrically compatible when the application continuous current requirement does not exceed 5.3 A. Physical compatibility must be verified by confirming that the substitute's dimensions (0.510" L x 0.370" W x 0.200" H) fit within the PCB footprint allocated for the original part. Both parts share identical inductance (4.7 µH), tolerance (±20%), shielding (unshielded), and mounting type (surface mount).

Q: What is the significance of the current rating difference between these parts?

A: The UP2-4R7-R is rated for 5.7 A continuous current, while the B82476B1472M100 is rated for 5.3 A. This 0.4 A difference reflects the thermal design of each inductor. If your application operates at or near 5.7 A continuously, the original part is required. If maximum continuous current is 5.3 A or lower, the substitute is acceptable. Transient or peak currents above the continuous rating must be evaluated separately using saturation current specifications.

Q: How do the saturation current values affect substitution?

A: Saturation current (Isat) indicates the current level at which the inductor's inductance begins to degrade due to magnetic core saturation. The UP2-4R7-R has Isat of 4.2 A, while the B82476B1472M100 has Isat of 5.4 A. The substitute provides a larger margin before saturation occurs, which is advantageous for circuits experiencing transient overcurrent conditions. However, if your circuit is designed to operate below 4.2 A, both parts perform identically in this regard.

Q: Does the physical size difference matter?

A: Yes. The B82476B1472M100 is slightly smaller (0.510" L x 0.370" W x 0.200" H) compared to the UP2-4R7-R (0.541" L x 0.345" W x 0.231" H). The substitute is 0.031" shorter in length and 0.031" shorter in height, but 0.025" wider. Verify that your PCB layout accommodates these dimensional changes, particularly regarding component spacing, trace routing, and clearance to adjacent components.

Q: What compliance advantages does the substitute offer?

A: The B82476B1472M100 carries ROHS3 compliance (versus RoHS compliance for the original) and AEC-Q200 automotive qualification. ROHS3 represents a higher environmental standard. AEC-Q200 indicates the part has passed automotive-grade reliability testing, making it suitable for applications requiring enhanced quality assurance, even in non-automotive contexts.

Q: Are there any temperature operating range considerations?

A: The UP2-4R7-R does not specify an operating temperature range in the provided data. The B82476B1472M100 specifies -55°C to 150°C operation. If your application requires operation outside standard industrial temperature ranges, the substitute's defined temperature specification provides explicit performance boundaries.

Q: How do DC resistance values compare?

A: The UP2-4R7-R has a maximum DC resistance of 17.3 mOhm, while the B82476B1472M100 has 16.5 mOhm maximum. Lower DC resistance reduces I²R power losses. At 5.3 A continuous current, the substitute dissipates approximately 4.6% less power than the original part, resulting in lower operating temperature and improved thermal efficiency.

Q: Can I use the substitute if my circuit is already designed for the UP2-4R7-R?

A: Substitution requires verification of three factors: (1) continuous current requirement does not exceed 5.3 A, (2) PCB footprint accommodates the substitute's dimensions, and (3) no design-specific requirements mandate the original part's exact specifications. If all three conditions are satisfied, the substitute is functionally equivalent. If any condition is not met, use the original part.