SCH53-680 Equivalent & Substitute Parts

Part Overview

The SCH53-680 is a 68 µH unshielded wirewound inductor manufactured by Signal Transformer, rated for 500 mA with a maximum DC resistance of 1.21Ohm. This component is classified as obsolete, making substitute parts necessary for ongoing production and maintenance applications. The part operates across an industrial temperature range of -40°C to 125°C and complies with ROHS3 and REACH standards.

Substiute Parts

SCH53-680

Signal TransformerIn Stock: 1126SCH53-680 Datasheet

Current PartRFQ

CDRH5D28RNP-680NC

Sumida America Components Inc.In Stock: 824CDRH5D28RNP-680NC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SCH53-680 is determined by the following critical parameters:

• Inductance value: 68 µH (exact match required)
• Current rating: minimum 480 mA (substitute must support primary application current)
• DC resistance: substitute DCR must be compatible with circuit design specifications
• Mounting type: Surface Mount (SMD) configuration
• Temperature range: substitute must cover or exceed the operating window
• Compliance: ROHS3 and REACH certifications required

The CDRH5D28RNP-680NC meets these substitution criteria with matching inductance, adequate current rating, and required compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The CDRH5D28RNP-680NC is an active substitute for the obsolete SCH53-680. Both components maintain ROHS3 compliance and operate within compatible temperature ranges for most industrial applications. The substitute features lower DC resistance (351mOhm vs. 1.21Ohm), which reduces power dissipation in the circuit. The current rating of 480 mA is marginally lower than the original 500 mA specification; circuit design must confirm this reduction is acceptable for the intended application. The substitute introduces shielding, which may alter electromagnetic coupling characteristics in sensitive circuit layouts. The tolerance specification widens from ±20% to ±30%, requiring verification against circuit performance requirements.

Frequently Asked Questions (FAQ)

Q: Can the CDRH5D28RNP-680NC directly replace the SCH53-680 in all applications?

A: Direct replacement is possible when the 480 mA current rating and ±30% tolerance are compatible with circuit specifications. The lower maximum operating temperature (100°C vs. 125°C) must be evaluated against thermal design requirements.

Q: What is the impact of the shielded design in the substitute part?

A: The CDRH5D28RNP-680NC incorporates shielding, whereas the original SCH53-680 is unshielded. This affects electromagnetic field distribution and may alter coupling with adjacent circuit elements. Circuit layout validation is necessary.

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

A: The substitute exhibits significantly lower DC resistance (351mOhm vs. 1.21Ohm), resulting in reduced resistive losses and lower heat generation. This generally improves efficiency but may require recalculation of voltage drops across the inductor.

Q: Are both parts available in the same packaging format?

A: The substitute is supplied in Tape & Reel (TR) packaging, suitable for automated assembly. Original packaging specifications for the SCH53-680 are not fully detailed in available data.

Q: What compliance certifications apply to both parts?

A: Both the SCH53-680 and CDRH5D28RNP-680NC are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for industrial and commercial applications.