SCB63C-181 Equivalent & Substitute Parts

Part Overview

The SCB63C-181 is a 180 µH shielded inductor manufactured by Signal Transformer, designed for surface mount applications with a current rating of 480 mA and maximum DC resistance of 1.27Ohm. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The part operates across the industrial temperature range of -40°C to 125°C and meets ROHS3 compliance requirements.

Substiute Parts

SCB63C-181

Signal TransformerIn Stock: 920SCB63C-181 Datasheet

Current PartRFQ

PA4300.184NLT

Pulse ElectronicsIn Stock: 1249PA4300.184NLT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCB63C-181 is based on strict electrical and mechanical parameter alignment. The primary substitute, PA4300.184NLT from Pulse Electronics, qualifies as an equivalent based on the following criteria:

Critical Matching Parameters:

• Inductance value: 180 µH (identical)
• Inductance tolerance: ±20% (identical)
• Shielding: Shielded (identical)
• Mounting type: Surface Mount (identical)
• Operating temperature range: -40°C to 125°C (identical)
• Package classification: Nonstandard (identical)
• Physical dimensions: 0.240" L x 0.240" W (6.10mm x 6.10mm) — within acceptable tolerance of original 6.20mm x 6.20mm
• Height (Seated Max): 0.118" (3.00mm) (identical)
• RoHS Status: ROHS3 Compliant (identical)
• Moisture Sensitivity Level: 1 (Unlimited) (identical)

Allowable Parameter Variations:

• Current Rating: Substitute rated at 305 mA versus original 480 mA. The substitute's lower current rating represents a design constraint; applications requiring the full 480 mA capability cannot use this substitute.
• DC Resistance: Substitute DCR of 1.05Ohm Max is lower than original 1.27Ohm Max, representing improved electrical performance.

Parameter Comparison

Engineering Selection Recommendations

The PA4300.184NLT from Pulse Electronics is the qualified substitute for the obsolete SCB63C-181. Selection of this substitute is appropriate for applications where the circuit design operates at or below 305 mA. The substitute maintains identical inductance, tolerance, shielding, temperature range, and compliance certifications as the original part.

For applications requiring the full 480 mA current capability of the original SCB63C-181, the PA4300.184NLT substitute is not suitable. In such cases, alternative inductors with matching 180 µH inductance and higher current ratings must be evaluated.

Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating, ensuring regulatory and environmental compatibility in production environments.

Frequently Asked Questions (FAQ)

Q: Can PA4300.184NLT be used as a direct replacement for SCB63C-181?

A: PA4300.184NLT qualifies as a substitute when circuit current requirements do not exceed 305 mA. The substitute matches all critical electrical and mechanical parameters including inductance, tolerance, shielding, temperature range, and physical dimensions. If your application requires the original 480 mA current rating, this substitute is not compatible.

Q: What are the key differences between these parts?

A: The primary difference is current rating: SCB63C-181 is rated at 480 mA while PA4300.184NLT is rated at 305 mA. The PA4300.184NLT also features lower DC resistance (1.05Ohm Max versus 1.27Ohm Max), which represents improved performance. Physical dimensions are nearly identical with negligible variation (6.20mm versus 6.10mm).

Q: Are the physical dimensions compatible for PCB layout?

A: Yes. Both parts are surface mount with identical height (3.00mm seated maximum) and nearly identical footprint dimensions (6.20mm x 6.20mm versus 6.10mm x 6.10mm). The 0.1mm difference in length and width is within standard PCB tolerance and does not require layout modification.

Q: Do both parts meet the same compliance standards?

A: Yes. Both SCB63C-181 and PA4300.184NLT are ROHS3 compliant, REACH unaffected, and carry MSL rating of 1 (Unlimited). Regulatory and environmental requirements are identical.

Q: Why is the original part obsolete?

A: SCB63C-181 is classified as obsolete by Signal Transformer. PA4300.184NLT from Pulse Electronics is an active product with current manufacturing support and inventory availability, making it the recommended substitute for ongoing production.