PM74SH-4R7M-RC Equivalent & Substitute Parts

Part Overview

The PM74SH-4R7M-RC is a 4.7 µH shielded drum core wirewound inductor manufactured by Bourns Inc., rated for 2.6 A continuous current with a maximum DC resistance of 30 mOhm. This surface mount component is designed for applications requiring controlled inductance with minimal DC losses in compact nonstandard packaging. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating, making it suitable for industrial and commercial electronics requiring stable inductive filtering or energy storage functions.

Substitute parts are identified when equivalent electrical performance can be maintained within the allowed parameter tolerances for this product category, ensuring functional interchangeability in circuit designs.

Substiute Parts

PM74SH-4R7M-RC

Bourns Inc.In Stock: 744PM74SH-4R7M-RC Datasheet

Current PartRFQ

P1167.452NL

Pulse ElectronicsIn Stock: 854P1167.452NL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PM74SH-4R7M-RC is determined by the following critical parameters:

Inductance Value: The main part specifies 4.7 µH with ±20% tolerance, establishing an acceptable range of 3.76 µH to 5.64 µH. Substitute parts must fall within this range to maintain circuit performance.

Current Rating: The 2.6 A continuous current rating is a hard requirement. Substitute parts must support at least 2.6 A without thermal or saturation-related degradation.

DC Resistance: Maximum 30 mOhm ensures power dissipation remains within design limits. Substitute parts matching or exceeding this specification are acceptable.

Shielding: The shielded construction is required to minimize electromagnetic interference. Only shielded inductors qualify as substitutes.

Mounting Type: Surface mount packaging is mandatory for PCB integration compatibility.

Compliance: RoHS3 compliance and unlimited MSL rating ensure regulatory and environmental compatibility.

The P1167.452NL from Pulse Electronics meets these substitution criteria with a 4.5 µH inductance (within tolerance range), 2.6 A current rating, 30 mOhm maximum DCR, shielded construction, and equivalent compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The P1167.452NL qualifies as a direct substitute based on the following engineering criteria:

Electrical Compatibility: The 4.5 µH inductance of the substitute falls within the ±20% tolerance window of the main part (3.76 µH to 5.64 µH range). Both parts maintain identical 2.6 A current ratings and 30 mOhm maximum DC resistance, ensuring equivalent power dissipation and thermal performance.

Regulatory Compliance: Both parts carry ROHS3 certification and unlimited MSL ratings, confirming compatibility with environmental and manufacturing standards.

Operational Margin: The substitute part demonstrates improved saturation current (2.9 A versus 2.2 A) and extended operating temperature range (-40°C to 130°C versus -40°C to 125°C), providing additional design margin in demanding applications.

Physical Integration: Both components are surface mount inductors in nonstandard packages. Physical dimensions differ slightly (7.54 mm × 7.54 mm × 4.50 mm for substitute versus 7.00 mm × 7.00 mm × 4.80 mm for main part), requiring PCB layout verification before implementation.

Product Status: Both parts are active in production with confirmed inventory availability, ensuring supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the P1167.452NL replace the PM74SH-4R7M-RC in all applications?

A: The P1167.452NL is electrically compatible within the specified tolerance range. However, physical dimensions differ slightly. PCB layout must be verified to confirm the substitute fits the allocated footprint space, particularly the height difference (4.50 mm versus 4.80 mm).

Q: What is the inductance tolerance impact of using the substitute?

A: The main part specifies ±20% tolerance (3.76 µH to 5.64 µH range). The substitute has ±30% tolerance but is specified at 4.5 µH, placing it well within the acceptable range. Circuit designs must account for the wider tolerance band of the substitute if inductance precision is critical.

Q: Are there thermal performance differences between these parts?

A: Both parts have identical maximum DC resistance (30 mOhm) at the specified 2.6 A current rating, resulting in equivalent power dissipation (approximately 202.8 mW). The substitute operates across a wider temperature range (-40°C to 130°C versus -40°C to 125°C), providing additional thermal margin.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the PM74SH-4R7M-RC and P1167.452NL are ROHS3 compliant with unlimited MSL ratings (Level 1), REACH unaffected status, and EAR99 export classification, ensuring equivalent regulatory compatibility.

Q: What is the saturation current difference, and does it matter?

A: The main part saturates at 2.2 A while the substitute saturates at 2.9 A. For applications operating at or near the 2.6 A rating, the substitute provides a larger safety margin before saturation-induced inductance degradation occurs.

Q: How do the self-resonant frequencies compare?

A: The main part has a 35 MHz self-resonant frequency while the substitute has 40 MHz. This difference affects high-frequency performance. Applications operating near or above 35 MHz should verify that the substitute's higher SRF does not alter circuit behavior.