Bourns 4632 100µH 400mA Wirewound Inductor - Equivalent & Substitute Parts

Part Overview

The Bourns 4632 is a 100µH unshielded drum core wirewound inductor rated for 400mA with a maximum DC resistance of 3Ohm. This through-hole axial component operates across -55°C to 105°C and is designed for general-purpose filtering and energy storage applications. The 4632 series is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The Hammond Manufacturing 1532H provides functional equivalence with improved compliance status.

Substiute Parts

4632

Bourns Inc.In Stock: 9854632 Datasheet

Current PartRFQ

1532H

Hammond ManufacturingIn Stock: 12551532H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Bourns 4632 is determined by strict equivalence across the following electrical and mechanical parameters:

• Inductance Value: 100 µH (exact match required)
• Current Rating: 400 mA minimum
• DC Resistance: 3 Ohm maximum
• Shielding Configuration: Unshielded
• Mounting and Package: Through-hole axial configuration
• Physical Footprint: 0.290" diameter x 0.875" length (7.37mm x 22.22mm)
• Frequency Characteristics: Self-resonant frequency at 12 MHz; Q factor of 107 @ 790kHz

The Hammond Manufacturing 1532H meets all electrical specifications and physical dimensions. Tolerance variation (±10% vs ±5%) does not disqualify substitution when the nominal inductance value remains 100µH within the application's acceptable range.

Parameter Comparison

Engineering Selection Recommendations

The Hammond Manufacturing 1532H is the qualified substitute for the obsolete Bourns 4632. Selection between these parts should be based on the following factors:

Product Status: The Bourns 4632 is obsolete. The Hammond 1532H carries active product status with ongoing manufacturer support and availability.

Compliance and Certifications: The Hammond 1532H is ROHS3 compliant, whereas the Bourns 4632 is RoHS non-compliant. Both parts are REACH unaffected and classified under ECCN EAR99. For applications requiring RoHS compliance, the Hammond 1532H is the required selection.

Inventory and Supply: The Hammond 1532H maintains higher inventory levels (1201 pcs) compared to the Bourns 4632 (962 pcs), supporting long-term supply chain continuity.

Electrical Performance: Both inductors deliver identical electrical performance across all specified parameters. The tolerance difference (±10% vs ±5%) does not impact functional equivalence when the nominal 100µH value is maintained within application requirements.

Frequently Asked Questions (FAQ)

Q: Can the Hammond 1532H be used as a direct replacement for the Bourns 4632 in existing designs?

A: Yes. The Hammond 1532H is electrically and mechanically equivalent. Both inductors share identical inductance values, current ratings, DC resistance, physical dimensions, and frequency characteristics. Direct PCB substitution is supported without circuit modification.

Q: What is the significance of the tolerance difference between ±5% and ±10%?

A: Tolerance defines the acceptable range around the nominal 100µH inductance value. The Bourns 4632 specifies ±5% (95µH to 105µH), while the Hammond 1532H specifies ±10% (90µH to 110µH). For applications where inductance precision is critical, verify that the Hammond part's wider tolerance remains within circuit specifications. Both parts maintain the same nominal value.

Q: Are the physical dimensions identical between these inductors?

A: Yes. Both the Bourns 4632 and Hammond 1532H measure 0.290" diameter x 0.875" length (7.37mm x 22.22mm). PCB footprints and mounting hole spacing are identical, enabling direct board-level substitution.

Q: Why is RoHS compliance important for this substitution?

A: RoHS compliance restricts hazardous substances in electrical components. The Hammond 1532H is ROHS3 compliant, meeting current regulatory requirements for many markets and applications. The obsolete Bourns 4632 is RoHS non-compliant. For new designs or regulated applications, the Hammond part is the appropriate selection.

Q: Do both inductors operate across the same temperature range?

A: The Bourns 4632 specifies -55°C to 105°C operating temperature. The Hammond 1532H does not provide an operating temperature specification in the available data. Verify Hammond's temperature rating against your application requirements before final selection.

Q: What is the Q factor, and why is it equivalent between these parts?

A: Q factor (quality factor) measures inductor efficiency at a specific frequency. Both inductors deliver Q = 107 @ 790kHz, indicating equivalent energy storage and loss characteristics at this test frequency. This equivalence supports identical circuit performance.