SCPH73-680 Equivalent & Substitute Parts

Part Overview

The SCPH73-680 is a 68 µH shielded inductor manufactured by Signal Transformer, designed for surface mount applications requiring fixed inductance in compact form factors. This component is rated for 840 mA continuous current with a maximum DC resistance of 520 mOhm and operates across the industrial temperature range of -40°C to 125°C. The part maintains Active product status and is RoHS3 compliant.

Equivalent and substitute parts are identified when alternative inductors meet or exceed the electrical and mechanical specifications required for direct replacement in circuit applications, particularly when original inventory is unavailable or when design flexibility permits component optimization.

Substiute Parts

SCPH73-680

Signal TransformerIn Stock: 1043SCPH73-680 Datasheet

Current PartRFQ

SRR0735A-680M

Bourns Inc.In Stock: 5612SRR0735A-680M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCPH73-680 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Inductance value: 68 µH at 1 kHz test frequency
• Inductance tolerance: ±20% or better
• Current rating: minimum 840 mA continuous
• Saturation current: minimum 540 mA
• DC resistance: 520 mOhm maximum
• Shielding: Shielded construction required

Mechanical & Environmental Equivalence Criteria:

• Mounting type: Surface Mount
• Operating temperature range: -40°C to 125°C minimum
• Package classification: Nonstandard form factor
• Physical dimensions: compatible with 7.50 × 7.50 mm footprint and 3.60 mm maximum height

Compliance Equivalence Criteria:

• RoHS3 compliance required
• Moisture Sensitivity Level: 1 (Unlimited)

The SRR0735A-680M from Bourns Inc. qualifies as a direct substitute based on matching inductance, tolerance, operating temperature, shielding, mounting type, and compliance certifications, while providing improved electrical performance in current rating and DC resistance characteristics.

Parameter Comparison

Engineering Selection Recommendations

SCPH73-680 (Signal Transformer): Select this part when the original design specification requires the 840 mA current rating and 520 mOhm maximum DC resistance. This part maintains Active product status and full RoHS3 compliance. Use when inventory availability and established supply chain relationships are priorities.

SRR0735A-680M (Bourns Inc.): Select this substitute when design margins permit operation at 720 mA continuous current. This part offers superior DC resistance performance at 400 mOhm maximum, reducing power dissipation and heat generation. The SRR0735A-680M carries AEC-Q200 automotive qualification, providing additional reliability assurance for applications requiring enhanced quality standards. Both parts maintain identical operating temperature ranges, shielding characteristics, and compliance certifications. The substitute's ferrite drum core construction with wirewound design provides stable inductance performance across the specified frequency range.

Frequently Asked Questions (FAQ)

Q: Can the SRR0735A-680M replace the SCPH73-680 in all applications?

A: The SRR0735A-680M is electrically compatible for applications where the circuit current demand does not exceed 720 mA continuous operation. The main part SCPH73-680 supports 840 mA, so substitution is appropriate only when actual circuit current remains below 720 mA. Both parts share identical inductance values, tolerance, operating temperature range, and shielding characteristics.

Q: What is the impact of the different DC resistance values?

A: The SRR0735A-680M exhibits 400 mOhm maximum DC resistance compared to 520 mOhm for the SCPH73-680. Lower DC resistance reduces resistive power loss (I²R), resulting in lower heat generation and improved efficiency. This represents a performance advantage of the substitute part.

Q: Are the physical dimensions compatible?

A: The SRR0735A-680M footprint measures 7.30 × 7.30 mm with 3.70 mm maximum seated height, compared to 7.50 × 7.50 mm and 3.60 mm for the SCPH73-680. Both dimensions are sufficiently close for PCB layout compatibility in nonstandard form factor applications. Verify specific PCB pad layout and clearance requirements for your design.

Q: What compliance certifications apply to both parts?

A: Both the SCPH73-680 and SRR0735A-680M are RoHS3 compliant, REACH unaffected, and classified as Moisture Sensitivity Level 1 (Unlimited). The SRR0735A-680M additionally carries AEC-Q200 automotive qualification, suitable for applications requiring enhanced reliability documentation.

Q: How do saturation current ratings affect substitution?

A: The SCPH73-680 saturates at 540 mA, while the SRR0735A-680M saturates at 740 mA. Higher saturation current in the substitute provides greater margin before inductance degradation occurs. For applications operating near saturation limits, the substitute offers improved performance headroom.