SCRH64B-181 Equivalent & Substitute Parts

Part Overview

The SCRH64B-181 is a 180 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 320 mA with a maximum DC resistance of 1.87Ohm. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The part operates across an industrial temperature range of -40°C to 125°C and meets ROHS3 compliance requirements.

Substiute Parts

SCRH64B-181

Signal TransformerIn Stock: 906SCRH64B-181 Datasheet

Current PartRFQ

CDRH62BNP-181MC-B

Sumida America Components Inc.In Stock: 856CDRH62BNP-181MC-B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCRH64B-181 is determined by the following critical parameters:

• Inductance Value: 180 µH ±20% tolerance
• Shielding Configuration: Shielded construction required
• Mounting Technology: Surface mount package
• Current Handling Capability: Minimum 320 mA rating
• DC Resistance: Maximum 1.87Ohm specification
• Environmental Compliance: ROHS3 compliance and MSL Level 1

The CDRH62BNP-181MC-B from Sumida America Components Inc. meets the core inductance, shielding, and mounting requirements. However, the substitute exhibits reduced current rating (260 mA versus 320 mA) and increased DC resistance (2.77Ohm versus 1.87Ohm), which must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

The CDRH62BNP-181MC-B qualifies as an active substitute based on matching inductance value, tolerance, shielding type, and surface mount configuration. Both components maintain ROHS3 compliance and MSL Level 1 ratings, supporting equivalent environmental and regulatory requirements.

Design consideration: The substitute part exhibits a 60 mA reduction in current rating and 0.90Ohm increase in DC resistance compared to the original SCRH64B-181. Circuit designs operating at or near the 320 mA specification of the original part require thermal and current margin analysis before substitution. The CDRH62BNP-181MC-B operates to a maximum temperature of 100°C versus 125°C for the original part, which may impact applications in elevated temperature environments.

Frequently Asked Questions (FAQ)

Q: Can the CDRH62BNP-181MC-B directly replace the SCRH64B-181 in all applications?

A: Direct substitution is valid for circuits where operating current remains below 260 mA and the increased DC resistance of 2.77Ohm does not exceed thermal or voltage drop budgets. Applications requiring the full 320 mA rating or operating above 100°C require design verification.

Q: What is the impact of the increased DC resistance on circuit performance?

A: The 0.90Ohm increase in maximum DC resistance will produce proportionally higher I²R losses. At 260 mA, the CDRH62BNP-181MC-B dissipates approximately 187 mW compared to 155 mW for the original part at the same current level. Power budget and thermal management must be reassessed.

Q: Are the physical dimensions compatible?

A: Both parts are surface mount inductors with nonstandard packages. The SCRH64B-181 measures 6.50mm × 6.40mm × 5.20mm (height), while the CDRH62BNP-181MC-B measures 6.60mm × 6.20mm × 3.00mm. The substitute is lower profile but slightly longer. PCB layout compatibility must be confirmed.

Q: What is the difference in packaging between these parts?

A: The SCRH64B-181 is supplied in standard packaging, while the CDRH62BNP-181MC-B is supplied in Tape & Reel (TR) format. This affects handling, storage, and automated assembly processes but does not impact electrical performance.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both the SCRH64B-181 and CDRH62BNP-181MC-B are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component use.