1641R-472K Equivalent & Substitute Parts

Part Overview

The 1641R-472K is a 4.7 µH shielded molded inductor manufactured by API Delevan Inc., designed for through-hole axial mounting applications. This component delivers 390 mA current rating with 550 mOhm maximum DC resistance and operates across the temperature range of -55°C to 105°C. The part maintains Active product status with full RoHS3 compliance and REACH unaffected certification.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances. The primary substitute for the 1641R-472K is the 9250A-472-RC from Bourns Inc., which shares identical inductance, tolerance, shielding characteristics, and physical dimensions while operating within compatible current and temperature specifications.

Substiute Parts

1641R-472K

API Delevan Inc.In Stock: 11261641R-472K Datasheet

Current PartRFQ

9250A-472-RC

Bourns Inc.In Stock: 14319250A-472-RC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1641R-472K is determined by strict adherence to the following electrical and mechanical parameters:

Electrical Parameters (Non-Negotiable):

• Inductance value must equal 4.7 µH with ±10% tolerance
• DC resistance must not exceed 550 mOhm
• Current saturation rating must be sufficient for 390 mA operation
• Shielding configuration must be maintained

Mechanical Parameters (Non-Negotiable):

• Package type must be axial through-hole
• Physical dimensions must match 0.162" diameter × 0.410" length (4.11mm × 10.41mm)
• Mounting compatibility with standard through-hole PCB assembly

Performance Parameters (Acceptable Variance):

• Operating temperature range may extend beyond -55°C to 105°C
• Q factor and self-resonant frequency characteristics must remain within the specified values
• Core material may differ (iron vs. ferrite) provided electrical specifications are maintained

Compliance Parameters:

• RoHS3 compliance required
• REACH unaffected status required

The 9250A-472-RC from Bourns Inc. qualifies as a direct substitute based on matching all critical electrical and mechanical parameters while maintaining regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 9250A-472-RC (Bourns Inc.)

The 9250A-472-RC qualifies as a direct substitute for the 1641R-472K based on the following engineering criteria:

1. Electrical Equivalence: Both components deliver identical inductance (4.7 µH ±10%), DC resistance (550 mOhm max), and quality factor (44 @ 7.9MHz). The 9250A-472-RC current saturation rating of 380 mA remains within acceptable operating margins for applications designed for 390 mA operation, provided circuit design does not require the full 390 mA capacity.

2. Mechanical Compatibility: Identical axial package dimensions (0.162" diameter × 0.410" length) and through-hole mounting configuration ensure direct PCB footprint compatibility without layout modifications.

3. Regulatory Compliance: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements.

4. Thermal Performance: The 9250A-472-RC extends the operating temperature range to -55°C to 125°C, providing enhanced thermal margin compared to the 1641R-472K specification of -55°C to 105°C.

5. Product Status: Both components maintain Active product status with confirmed inventory availability.

Selection Criteria for Substitution:

• Use the 9250A-472-RC when the 1641R-472K is unavailable or when extended temperature operation to 125°C is required
• Verify circuit design does not mandate the full 390 mA saturation current; 380 mA rating must be sufficient for application requirements
• Confirm PCB assembly equipment compatibility with Bourns component specifications

Frequently Asked Questions (FAQ)

Q: Can the 9250A-472-RC replace the 1641R-472K in all applications?

A: The 9250A-472-RC is electrically and mechanically compatible with the 1641R-472K for applications where the circuit design current requirement does not exceed 380 mA. If the application requires the full 390 mA saturation current capacity, the 1641R-472K must be used. Both components share identical inductance, tolerance, DC resistance, shielding, package dimensions, and mounting configuration.

Q: What is the difference between the iron core (1641R-472K) and ferrite core (9250A-472-RC)?

A: Both core materials deliver identical electrical performance as specified in the parameter comparison. The core material difference does not affect inductance value, DC resistance, quality factor, or self-resonant frequency within the specified operating parameters. Material selection is a manufacturing choice that does not impact substitution compatibility.

Q: Are there any temperature-related considerations when substituting the 9250A-472-RC?

A: The 9250A-472-RC operates across -55°C to 125°C, extending 20°C beyond the 1641R-472K upper limit of 105°C. For applications operating within the 1641R-472K temperature range (-55°C to 105°C), both components perform identically. For applications requiring operation above 105°C, the 9250A-472-RC provides additional thermal margin.

Q: Do both components have identical physical dimensions for PCB mounting?

A: Yes. Both the 1641R-472K and 9250A-472-RC share identical axial package dimensions of 0.162" diameter × 0.410" length (4.11mm × 10.41mm). No PCB layout modifications are required when substituting between these components.

Q: What compliance certifications apply to both components?

A: Both components maintain ROHS3 compliance and REACH unaffected status. No additional compliance verification is required when substituting the 9250A-472-RC for the 1641R-472K in regulated applications.

Q: Is the 10 mA difference in current saturation rating significant?

A: The 9250A-472-RC current saturation rating of 380 mA is 10 mA lower than the 1641R-472K specification of 390 mA. This difference is significant only if the circuit design operates at or near the 390 mA threshold. For applications with design margin below 380 mA, the difference is not operationally significant. Circuit design review is necessary to confirm the 380 mA rating is sufficient.