Hammond Manufacturing 1531R Equivalent & Substitute Parts

Part Overview

The Hammond Manufacturing 1531R is a 10 µH unshielded wirewound inductor rated for 500 mA with a maximum DC resistance of 1.5 Ohm, designed for through-hole axial mounting. This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing design support and production continuity. Equivalent parts must maintain the same inductance value, current rating, DC resistance specification, and physical form factor to ensure direct functional replacement in existing circuit designs.

Substiute Parts

1531R

Hammond ManufacturingIn Stock: 11061531R Datasheet

Current PartRFQ

4612-RC

Bourns Inc.In Stock: 39814612-RC Datasheet

DirectRFQ

2890-20K

API Delevan Inc.In Stock: 10862890-20K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1531R are identified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Direct Electrical Parameters:

• Inductance value: 10 µH (exact match required)
• Tolerance: ±10% (matching specification)
• Shielding configuration: Unshielded (matching specification)
• Mounting type: Through Hole Axial (matching form factor)

Current and Resistance Specifications:

• Current rating must meet or exceed 500 mA
• DC resistance must not exceed 1.5 Ohm maximum

Physical Compatibility:

• Package type: Axial through-hole
• Physical dimensions must accommodate PCB layout constraints

The 1531R has two identified substitute parts: the Bourns Inc. 4612-RC (direct substitute) and the API Delevan Inc. 2890-20K (similar substitute with parameter deviations).

Parameter Comparison

Engineering Selection Recommendations

Bourns Inc. 4612-RC (Direct Substitute): The 4612-RC is the primary equivalent for the obsolete 1531R. It matches all critical electrical parameters: 10 µH inductance, 500 mA current rating, and 1.5 Ohm maximum DC resistance. Physical dimensions are identical (0.270" Dia x 0.750" L), ensuring direct PCB compatibility. The 4612-RC is active in production with ROHS3 compliance, providing long-term supply availability and regulatory alignment. This part is suitable for direct replacement without circuit redesign.

API Delevan Inc. 2890-20K (Similar Substitute with Deviations): The 2890-20K maintains the same 10 µH inductance and ±10% tolerance but presents parameter deviations that require evaluation. The current rating is 475 mA (25 mA below the 1531R specification) and DC resistance is 1.9 Ohm maximum (0.4 Ohm above specification). Physical dimensions differ (0.280" Dia x 0.900" L versus 0.270" Dia x 0.750" L), requiring PCB layout verification. The 2890-20K is RoHS non-compliant, which may conflict with regulatory requirements. This part is suitable only when current and resistance deviations are acceptable for the application and RoHS compliance is not mandated.

Frequently Asked Questions (FAQ)

Q: Can the Bourns 4612-RC directly replace the Hammond 1531R without circuit modification?

A: Yes. The 4612-RC matches all critical electrical specifications (10 µH, 500 mA, 1.5 Ohm DCR) and physical dimensions (0.270" Dia x 0.750" L). Direct PCB substitution is possible without circuit redesign.

Q: What are the limitations of using the API Delevan 2890-20K as a substitute?

A: The 2890-20K has three deviations: reduced current rating (475 mA vs. 500 mA), increased DC resistance (1.9 Ohm vs. 1.5 Ohm), and larger physical dimensions (0.280" Dia x 0.900" L). Additionally, it is RoHS non-compliant. These factors must be evaluated against application requirements before selection.

Q: Are physical dimension differences between the 1531R and 2890-20K significant?

A: Yes. The 2890-20K is 0.010" larger in diameter and 0.150" longer than the 1531R. PCB layout must accommodate these differences, including component spacing and clearance requirements.

Q: Which substitute part offers the best long-term supply assurance?

A: The Bourns 4612-RC is active in production with established supply channels and ROHS3 compliance, providing superior long-term availability compared to the obsolete 1531R or the RoHS non-compliant 2890-20K.

Q: Does inductance tolerance affect substitute part selection?

A: No. Both substitute parts maintain the ±10% tolerance specification matching the 1531R. Inductance tolerance is not a differentiating factor in this substitution analysis.