CDRH124NP-820MC Equivalent & Substitute Parts

Part Overview

The CDRH124NP-820MC is a 82 µH shielded inductor manufactured by Sumida America Components Inc., rated for 1.3 A continuous current with a maximum DC resistance of 260 mOhm. This surface mount component operates across the temperature range of -40°C to 100°C and is RoHS3 compliant. The part is currently active in production with 783 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, design optimization, and supply chain continuity when the primary part becomes unavailable or when application requirements necessitate alternative electrical or mechanical characteristics.

Substiute Parts

CDRH124NP-820MC

Sumida America Components Inc.In Stock: 845CDRH124NP-820MC Datasheet

Current PartRFQ

SRR1240-820M

Bourns Inc.In Stock: 2747SRR1240-820M Datasheet

DirectRFQ

UP2B-820-R

Eaton - Electronics DivisionIn Stock: 1421UP2B-820-R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDRH124NP-820MC is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Inductance value: 82 µH (±20% tolerance band)
• Current rating: minimum 1.3 A
• DC resistance: maximum 260 mOhm
• Core material: Ferrite
• Mounting type: Surface Mount
• Inductance test frequency: 100 kHz
• Compliance: RoHS3 or equivalent regulatory status

Secondary Compatibility Factors:

• Operating temperature range must encompass or exceed -40°C to 100°C
• Shielding configuration (shielded preferred for EMI-sensitive applications)
• Package dimensions and height constraints for PCB layout

Parts meeting all primary criteria are classified as direct substitutes. Parts meeting primary electrical criteria but differing in shielding or temperature range are classified as similar substitutes, requiring application-level verification.

Parameter Comparison

Engineering Selection Recommendations

SRR1240-820M (Bourns Inc.) — Direct Substitute

The SRR1240-820M meets all primary substitution criteria for the CDRH124NP-820MC. Both components feature identical inductance (82 µH), ferrite core construction, shielded configuration, and 100 kHz test frequency. The SRR1240-820M provides a higher current rating (1.35 A versus 1.3 A) and lower DC resistance (250 mOhm versus 260 mOhm), resulting in improved thermal performance. The extended operating temperature range (-40°C to 125°C) provides additional margin beyond the primary part's specification. Both parts carry ROHS3 compliance and MSL 1 rating. Footprint dimensions are comparable (12.50 x 12.50 mm versus 12.00 x 12.00 mm), with identical seated height of 4.50 mm. This part is suitable for direct substitution in applications requiring shielded inductor performance.

UP2B-820-R (Eaton - Electronics Division) — Similar Substitute

The UP2B-820-R shares the core electrical specifications of 82 µH inductance, ferrite core, and 100 kHz test frequency. Current rating (1.34 A) and DC resistance (223.5 mOhm) are within acceptable substitution parameters. However, this part differs in two critical aspects: unshielded configuration and reduced operating temperature range (-40°C to 85°C). The unshielded design may introduce electromagnetic interference in noise-sensitive applications. The maximum operating temperature of 85°C is below the primary part's 100°C specification, limiting use in high-temperature environments. Footprint dimensions are larger (13.97 x 10.41 mm) with increased seated height (6.00 mm), requiring PCB layout verification. This part is suitable for substitution only in applications where EMI shielding is not required and operating temperature remains below 85°C.

Frequently Asked Questions (FAQ)

Q: Can the SRR1240-820M replace the CDRH124NP-820MC in all applications?

A: The SRR1240-820M is electrically and mechanically compatible with the CDRH124NP-820MC across all specified parameters. Both components are shielded, ferrite-core inductors with identical inductance and test frequency. The SRR1240-820M provides superior current handling and lower DC resistance. Footprint dimensions are comparable, though PCB layout should be verified for the 0.50 mm increase in length and width. Direct substitution is supported.

Q: When should the UP2B-820-R be used instead of the primary part?

A: The UP2B-820-R is suitable only when the application does not require electromagnetic shielding and operates below 85°C. The unshielded configuration reduces component cost but increases susceptibility to external magnetic fields. The reduced temperature rating eliminates this part from high-temperature applications. PCB layout must accommodate the larger footprint (13.97 x 10.41 mm) and increased height (6.00 mm).

Q: Are all three parts RoHS compliant?

A: The CDRH124NP-820MC and SRR1240-820M are ROHS3 compliant. The UP2B-820-R is RoHS compliant. Both compliance levels meet current regulatory requirements. All three parts carry MSL 1 (Unlimited) moisture sensitivity rating.

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

A: DC resistance directly affects power dissipation and thermal performance. The CDRH124NP-820MC specifies 260 mOhm maximum, while the SRR1240-820M specifies 250 mOhm maximum, and the UP2B-820-R specifies 223.5 mOhm maximum. Lower DC resistance reduces I²R losses. At 1.3 A, the CDRH124NP-820MC dissipates up to 0.439 W, while the SRR1240-820M dissipates up to 0.423 W. The UP2B-820-R dissipates up to 0.291 W. Selection should account for thermal budget and PCB copper area for heat dissipation.

Q: How do package dimensions affect PCB design?

A: The CDRH124NP-820MC measures 12.00 x 12.00 mm with 4.50 mm height. The SRR1240-820M measures 12.50 x 12.50 mm with 4.50 mm height, requiring 0.50 mm additional clearance in both X and Y directions. The UP2B-820-R measures 13.97 x 10.41 mm with 6.00 mm height, requiring significantly larger footprint area and increased vertical clearance. PCB layout must be verified before substitution to ensure component placement, trace routing, and clearance compliance.

Q: What is the significance of the shielded versus unshielded configuration?

A: Shielded inductors (CDRH124NP-820MC and SRR1240-820M) contain magnetic flux within the component, reducing electromagnetic interference with adjacent circuits. Unshielded inductors (UP2B-820-R) allow magnetic field radiation, which may couple into sensitive analog or RF circuits. Shielded configuration is required in noise-sensitive applications, mixed-signal designs, and high-frequency circuits. Unshielded configuration is acceptable in power delivery and isolated circuit sections where EMI is not a concern.