Hammond Manufacturing 1535D Equivalent & Substitute Parts

Part Overview

The Hammond Manufacturing 1535D is a 5 mH unshielded wirewound inductor rated for 160 mA with a maximum DC resistance of 14 ohms, designed for through-hole axial mounting. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The 1535D operates at a self-resonant frequency of 1 MHz with a Q factor of 91 at 250 kHz, suitable for general-purpose filtering and energy storage applications in through-hole circuit designs.

Key Parameters

Parameter	Value
Inductance	5 mH
Inductance Tolerance	±5%
Current Rating	160 mA
DC Resistance (Max)	14 Ohm
Shielding	Unshielded
Mounting Type	Through Hole
Package / Case	Axial
Type	Wirewound
Q @ 250 kHz	91
Self-Resonant Frequency	1 MHz
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the 1535D is determined by the following critical parameters:

Inductance Value: 5 mH ±5% tolerance (primary electrical requirement)
Current Rating: Minimum 160 mA to support the original design current
DC Resistance: Maximum 14 ohms to maintain circuit performance
Mounting Type: Through hole axial configuration
Shielding: Unshielded construction
Compliance: ROHS3 compliant for regulatory alignment

The substitute parts listed below meet the core inductance and mounting requirements but exhibit variations in current rating, DC resistance, and inductor type (wirewound vs. molded). These variations must be evaluated against specific circuit requirements.

Parameter Comparison

Parameter	1535D (Main)	2500R-62J	AIAP-02-472K
Manufacturer	Hammond Manufacturing	API Delevan Inc.	Abracon LLC
Inductance	5 mH	5 mH	4.7 mH
Inductance Tolerance	±5%	±5%	±10%
Current Rating (Amps)	160 mA	58 mA	180 mA
DC Resistance (Max)	14 Ohm	50 Ohm	9.66 Ohm
Type	Wirewound	Molded	Wirewound
Shielding	Unshielded	Unshielded	Unshielded
Q @ 250 kHz	91	80	Not provided
Self-Resonant Frequency	1 MHz	1.3 MHz	Not provided
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	Axial	Axial	Axial
Operating Temperature	Not provided	-55°C ~ 105°C	-40°C ~ 85°C
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

API Delevan 2500R-62J: This substitute maintains the 5 mH inductance value and ±5% tolerance matching the 1535D. However, the current rating of 58 mA is significantly lower than the 160 mA requirement, and the DC resistance of 50 ohms exceeds the 14 ohm maximum. This part is suitable only for applications where circuit current does not exceed 58 mA and higher DC resistance is acceptable. The molded construction and active product status provide long-term availability.

Abracon AIAP-02-472K: This wirewound inductor offers a current rating of 180 mA, exceeding the 1535D requirement, and a DC resistance of 9.66 ohms, which is lower than the 14 ohm maximum. The inductance value is 4.7 mH with ±10% tolerance, representing a 6% deviation from the nominal 5 mH specification. This part is suitable for applications where the 4.7 mH inductance value is acceptable within circuit design margins and the lower DC resistance is beneficial. Active product status ensures procurement availability.

Both substitute parts carry ROHS3 compliance and REACH unaffected status, maintaining regulatory alignment with the original 1535D.

Frequently Asked Questions (FAQ)

Q: Can the 2500R-62J directly replace the 1535D in all applications?

A: No. The 2500R-62J has a maximum current rating of 58 mA, which is insufficient for circuits requiring the full 160 mA rating of the 1535D. Additionally, the 50 ohm DC resistance is significantly higher than the 14 ohm maximum of the original part. Substitution is limited to low-current applications where these parameter differences are acceptable.

Q: Is the AIAP-02-472K suitable as a substitute despite the 4.7 mH inductance value?

A: The AIAP-02-472K inductance of 4.7 mH represents a 6% reduction from the 5 mH specification. Suitability depends on circuit design tolerance for inductance variation. The ±10% tolerance specification allows for inductance values between 4.23 mH and 5.17 mH. Circuit analysis is required to confirm that 4.7 mH operation is acceptable for the intended application.

Q: What are the key differences between wirewound and molded inductor types?

A: The 1535D and AIAP-02-472K are wirewound inductors, while the 2500R-62J is molded. Wirewound inductors typically offer lower DC resistance and higher Q factors. Molded inductors provide compact construction and consistent performance. Type selection depends on circuit requirements for resistance, frequency response, and physical space constraints.

Q: Are all substitute parts RoHS compliant?

A: Yes. The 1535D, 2500R-62J, and AIAP-02-472K are all ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.

Q: What is the impact of DC resistance differences on circuit performance?

A: DC resistance affects power dissipation and voltage drop across the inductor. The 1535D maximum of 14 ohms, the AIAP-02-472K at 9.66 ohms, and the 2500R-62J at 50 ohms represent significant variations. Lower DC resistance reduces power loss; higher resistance increases it. Circuit design must account for these differences in energy efficiency calculations and thermal management.

Q: Why is the 1535D classified as obsolete?

A: Obsolete status indicates that Hammond Manufacturing has discontinued production. The substitute parts listed are active products from alternative manufacturers, ensuring continued availability for new designs and maintenance applications.

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