PM74SH-101M-RC Equivalent & Substitute Parts

Part Overview

The PM74SH-101M-RC is a 100 µH shielded drum core wirewound inductor manufactured by Bourns Inc., rated for 650 mA continuous current with a maximum DC resistance of 300mOhm. This surface mount component operates across the temperature range of -40°C to 125°C and is ROHS3 compliant. The part is currently active in production with 1099 units available in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductor category.

Substiute Parts

PM74SH-101M-RC

Bourns Inc.In Stock: 1158PM74SH-101M-RC Datasheet

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SRR7045-101M

Bourns Inc.In Stock: 4878SRR7045-101M Datasheet

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P1167.104NLT

Pulse ElectronicsIn Stock: 9734P1167.104NLT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PM74SH-101M-RC are qualified based on the following critical parameters:

• Inductance value of 100 µH within ±20% tolerance
• Shielded construction to maintain electromagnetic isolation
• Surface mount packaging with compatible footprint dimensions
• Current rating sufficient for 650 mA operation
• DC resistance within acceptable limits for the application
• Operating temperature range covering -40°C to 125°C
• ROHS3 compliance and MSL 1 rating

The two identified substitutes meet these core electrical and mechanical requirements while maintaining functional equivalence in standard inductor applications.

Parameter Comparison

Engineering Selection Recommendations

SRR7045-101M (Bourns Inc.) provides the closest electrical match to the PM74SH-101M-RC. Both parts share identical inductance, tolerance, DC resistance specifications, and Q factor characteristics. The SRR7045-101M offers a higher current rating of 1 A compared to 650 mA, providing additional design margin. Footprint dimensions are identical at 7.00mm x 7.00mm with matching height of 4.80mm. Both parts maintain ROHS3 compliance, MSL 1 rating, and identical operating temperature range. This substitute is suitable for direct replacement in applications where the higher current capability does not introduce thermal or cost constraints.

P1167.104NLT (Pulse Electronics) meets the core inductance and shielding requirements with a current rating of 630 mA, which is marginally lower than the primary part's 650 mA specification. The DC resistance is specified at 390mOhm maximum, representing a 30% increase over the PM74SH-101M-RC. The self-resonant frequency is 6.2MHz compared to 8MHz for the primary part. Footprint dimensions are slightly larger at 7.54mm x 7.54mm, though height is reduced to 4.50mm. This substitute is applicable in applications where the slightly elevated DC resistance and reduced self-resonant frequency are acceptable within circuit design parameters. ROHS3 compliance and MSL 1 rating are maintained.

Both substitutes maintain active product status and full regulatory compliance. Selection between substitutes should be based on specific application requirements regarding current margin, DC resistance tolerance, and PCB layout constraints.

Frequently Asked Questions (FAQ)

Q: Can the SRR7045-101M be used as a direct replacement for the PM74SH-101M-RC?

A: Yes. Both parts share identical inductance (100 µH), tolerance (±20%), DC resistance (300mOhm max), shielding, and footprint dimensions (7.00mm x 7.00mm x 4.80mm). The SRR7045-101M has a higher current rating (1 A vs 650 mA), which provides additional design margin without affecting electrical performance in standard applications.

Q: What are the key differences between the PM74SH-101M-RC and P1167.104NLT?

A: The P1167.104NLT has a slightly lower current rating (630 mA vs 650 mA), higher DC resistance (390mOhm vs 300mOhm), and a lower self-resonant frequency (6.2MHz vs 8MHz). The footprint is also slightly larger (7.54mm x 7.54mm vs 7.00mm x 7.00mm). These differences may impact high-frequency performance and thermal characteristics in specific applications.

Q: Are all three parts ROHS3 compliant?

A: Yes. The PM74SH-101M-RC, SRR7045-101M, and P1167.104NLT are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating and REACH Unaffected status.

Q: What is the inductance tolerance for these parts?

A: All three parts have an inductance tolerance of ±20%, meaning the actual inductance value will fall within 80 µH to 120 µH for the specified 100 µH nominal value.

Q: Can the P1167.104NLT be used in high-frequency applications?

A: The P1167.104NLT has a self-resonant frequency of 6.2MHz compared to 8MHz for the PM74SH-101M-RC and SRR7045-101M. Applications operating near or above 6.2MHz may experience performance degradation with the P1167.104NLT. Verify circuit operating frequency against this specification before selection.

Q: What is the maximum operating temperature for these inductors?

A: The PM74SH-101M-RC and SRR7045-101M operate from -40°C to 125°C. The P1167.104NLT extends to -40°C to 130°C, providing 5°C additional high-temperature margin.

Q: Are there any PCB layout considerations for these parts?

A: The PM74SH-101M-RC and SRR7045-101M have identical footprints (7.00mm x 7.00mm). The P1167.104NLT requires a slightly larger footprint (7.54mm x 7.54mm) but has a lower profile (4.50mm vs 4.80mm). Verify PCB layout space availability before selecting the P1167.104NLT as a substitute.