SCRH64B-270 Equivalent & Substitute Parts

Part Overview

The SCRH64B-270 is a 27 µH shielded inductor manufactured by Signal Transformer, rated for 820 mA continuous current with a maximum DC resistance of 300 mOhm. This surface mount component is designed for applications requiring fixed inductance in compact form factors. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

SCRH64B-270

Signal TransformerIn Stock: 1133SCRH64B-270 Datasheet

Current PartRFQ

7447785127

Würth ElektronikIn Stock: 7747447785127 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCRH64B-270 is determined by the following critical parameters:

• Inductance Value: Must be 27 µH with tolerance range compatible to the application
• Current Rating: Minimum 820 mA to maintain equivalent current handling capability
• DC Resistance: Maximum 300 mOhm to preserve circuit performance and thermal characteristics
• Shielding: Must be shielded to maintain electromagnetic isolation
• Operating Temperature: Must support -40°C ~ 125°C range
• Mounting Type: Surface mount configuration required
• Physical Footprint: Nonstandard package; dimensional compatibility must be verified for PCB layout

The Würth Elektronik part 7447785127 qualifies as a substitute based on matching inductance value, exceeding current rating specifications, maintaining shielded construction, and supporting the required temperature range.

Parameter Comparison

Engineering Selection Recommendations

The Würth Elektronik 7447785127 is an active product suitable for replacing the obsolete SCRH64B-270. Both components maintain ROHS3 compliance and unlimited moisture sensitivity rating, ensuring regulatory and environmental compatibility.

The substitute part provides improved current handling (900 mA vs. 820 mA) and higher saturation current (1 A vs. 820 mA), offering design margin for applications operating near rated current limits. The increased DC resistance (360 mOhm vs. 300 mOhm) represents a 20% rise in resistive losses and must be evaluated against thermal and efficiency requirements of the specific application.

Physical dimensions differ slightly; the substitute is smaller in footprint (6.20mm x 5.90mm vs. 6.50mm x 6.40mm) and significantly lower in height (3.30mm vs. 5.20mm). PCB layout verification is required to confirm mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the Würth Elektronik 7447785127 directly replace the SCRH64B-270 in all applications?

A: Direct replacement requires verification of three factors: (1) PCB footprint and height clearance compatibility, (2) acceptable DC resistance increase from 300 mOhm to 360 mOhm for thermal and efficiency performance, and (3) inductance tolerance impact (±25% vs. ±20%) on circuit tuning or filtering characteristics.

Q: What is the significance of the higher saturation current in the substitute part?

A: The 7447785127 provides 1 A saturation current compared to 820 mA in the original part. This offers additional design margin and reduces the risk of inductor saturation in applications experiencing transient current spikes or worst-case operating conditions.

Q: How does the increased DC resistance affect circuit performance?

A: The 60 mOhm increase in DC resistance (from 300 mOhm to 360 mOhm) results in higher resistive losses. In power conversion applications, this translates to increased heat dissipation. Circuit simulations or thermal analysis should confirm acceptable performance within the application's thermal budget.

Q: Are there packaging or supply chain considerations?

A: The SCRH64B-270 is obsolete with limited inventory (1110 pcs reported). The Würth Elektronik 7447785127 is an active product with established supply chain availability (734 pcs in stock). Long-term design support favors the active substitute part.

Q: What compliance certifications apply to the substitute part?

A: The 7447785127 carries AEC-Q200 automotive qualification, ROHS3 compliance, and REACH unaffected status, matching the regulatory profile of the original component.