Bourns 4642-RC Equivalent & Substitute Parts

Part Overview

The Bourns 4642-RC is a 100 µH unshielded wirewound inductor rated for 160 mA with a maximum DC resistance of 5.4 Ohm, designed for through-hole axial mounting. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The 4642-RC operates across a temperature range of -55°C to 125°C and meets ROHS3 compliance requirements.

Substiute Parts

4642-RC

Bourns Inc.In Stock: 11234642-RC Datasheet

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1532H

Hammond ManufacturingIn Stock: 12551532H Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the Bourns 4642-RC is determined by the following critical parameters:

• Inductance Value: Must match 100 µH
• Mounting Type: Must be through-hole axial configuration
• Core Type: Unshielded wirewound construction
• Frequency Characteristics: Inductance measured at 790 kHz test frequency
• Compliance: ROHS3 compliance required

The Hammond Manufacturing 1532H meets these core substitution criteria. While the 1532H offers higher current rating (400 mA versus 160 mA) and lower DC resistance (3 Ohm versus 5.4 Ohm), these represent performance improvements within the same functional category. The identical inductance value, matching test frequency, equivalent mounting configuration, and shared compliance certifications establish this as a valid substitute.

Parameter Comparison

Engineering Selection Recommendations

The Hammond Manufacturing 1532H is an active product with current manufacturing support, addressing the obsolescence status of the Bourns 4642-RC. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new designs and production runs.

The 1532H provides enhanced electrical performance through lower DC resistance (3 Ohm versus 5.4 Ohm) and higher quality factor (107 versus 49 at 790 kHz), resulting in reduced power dissipation and improved frequency response characteristics. The increased current rating (400 mA versus 160 mA) provides additional design margin without compromising the core 100 µH inductance specification.

Physical dimensions differ slightly, with the 1532H featuring a smaller diameter (0.290" versus 0.410") while maintaining identical axial length (0.875"). This dimensional change may require PCB layout verification for through-hole spacing compatibility.

Frequently Asked Questions (FAQ)

Q: Can the Hammond 1532H directly replace the Bourns 4642-RC in existing designs?

A: The 1532H matches the critical electrical specifications: 100 µH inductance, through-hole axial mounting, unshielded wirewound construction, and 790 kHz test frequency. Physical dimensions differ slightly in diameter, requiring PCB layout confirmation. Both components meet ROHS3 and REACH compliance requirements.

Q: What is the significance of the different current ratings?

A: The 4642-RC is rated for 160 mA, while the 1532H is rated for 400 mA. The 1532H's higher rating provides additional design margin and does not create incompatibility. Circuits designed for 160 mA operation will function within the 1532H's specifications.

Q: How do the tolerance specifications affect substitution?

A: The 4642-RC specifies ±5% tolerance, while the 1532H specifies ±10%. For applications requiring tighter inductance tolerance, the 4642-RC's specification is more stringent. Circuit designs must account for the 1532H's wider tolerance band if inductance precision is critical.

Q: Are there physical mounting considerations?

A: Both components use through-hole axial mounting with identical length (0.875"). The 1532H has a smaller diameter (0.290" versus 0.410"), which may affect PCB hole spacing and component density. Verify through-hole pad spacing compatibility before implementation.

Q: What compliance certifications apply to both parts?

A: Both the Bourns 4642-RC and Hammond 1532H are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and use.