CDR74NP-221MC Equivalent & Substitute Parts

Part Overview

The CDR74NP-221MC is a 220 µH shielded surface mount inductor manufactured by Sumida America Components Inc., rated for 350 mA continuous current with a maximum DC resistance of 1.31 Ohm. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates at a self-resonant frequency of 5.07 MHz and is fully RoHS3 compliant with MSL Level 1 rating.

Substiute Parts

CDR74NP-221MC

Sumida America Components Inc.In Stock: 1180CDR74NP-221MC Datasheet

Current PartRFQ

CDRH74NP-221MC-B

Sumida America Components Inc.In Stock: 6737CDRH74NP-221MC-B Datasheet

SimilarRFQ

SRR7045-221M

Bourns Inc.In Stock: 2457SRR7045-221M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDR74NP-221MC is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 220 µH (exact match required)
• Shielding type: Shielded (electromagnetic containment requirement)
• Mounting technology: Surface Mount (PCB assembly compatibility)
• Current rating: Minimum 350 mA (operational envelope requirement)
• DC resistance: Maximum 1.31 Ohm (thermal and efficiency constraint)

Secondary Compatibility Factors:

• Tolerance band: ±20% or tighter
• Package classification: Nonstandard form factor
• Compliance certifications: RoHS3 and MSL Level 1
• Self-resonant frequency: Minimum 5.0 MHz

Two substitute parts meet these criteria with varying performance enhancements:

CDRH74NP-221MC-B (Sumida America Components Inc.): Active product with improved current rating (360 mA) and reduced DCR (1.17 Ohm), maintaining identical inductance and shielding specifications. Compact footprint (7.30mm x 7.30mm) with operating temperature range -40°C to 100°C.

SRR7045-221M (Bourns Inc.): Active product with enhanced current rating (640 mA) and significantly lower DCR (700 mOhm), featuring drum core wirewound construction. Operates across -40°C to 125°C with higher Q factor (44 @ 796 kHz) and saturation current specification (400 mA).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Minimum Change): Select CDRH74NP-221MC-B when the design requires the closest functional equivalent to the obsolete CDR74NP-221MC. This part maintains identical inductance and shielding characteristics while offering marginal improvements in current capacity (360 mA vs. 350 mA) and reduced DC resistance (1.17 Ohm vs. 1.31 Ohm). The active product status ensures long-term availability and supply chain stability. Footprint dimensions are comparable (7.30mm x 7.30mm vs. 7.70mm x 7.10mm), permitting direct PCB layout adaptation. Both parts share RoHS3 compliance and MSL Level 1 rating.

For Enhanced Performance: Select SRR7045-221M when the application permits design optimization. This Bourns inductor delivers substantially higher current capacity (640 mA), significantly lower DC resistance (700 mOhm), and extended operating temperature range (-40°C to 125°C). The drum core wirewound construction provides measurable Q factor (44 @ 796 kHz) and defined saturation current (400 mA). Compact footprint (7.00mm x 7.00mm) offers space efficiency. Active product status and full RoHS3/REACH compliance support procurement continuity.

Compliance Verification: All three inductors maintain RoHS3 compliance and MSL Level 1 rating. CDRH74NP-221MC-B and SRR7045-221M are active products with established supply chains, whereas CDR74NP-221MC is obsolete. Both substitutes are available in Tape & Reel packaging for automated assembly.

Frequently Asked Questions (FAQ)

Q: Can CDRH74NP-221MC-B directly replace CDR74NP-221MC without circuit modification?

A: Yes. Both inductors share identical inductance (220 µH), shielding type, and surface mount configuration. The CDRH74NP-221MC-B offers equal or superior electrical performance with 360 mA current rating versus 350 mA, and lower DC resistance (1.17 Ohm vs. 1.31 Ohm). Footprint dimensions are comparable, requiring only minor PCB layout adjustment. No circuit redesign is necessary.

Q: What are the physical footprint differences between these three parts?

A: CDR74NP-221MC measures 7.70mm L x 7.10mm W x 4.85mm H. CDRH74NP-221MC-B measures 7.30mm L x 7.30mm W x 4.50mm H. SRR7045-221M measures 7.00mm L x 7.00mm W x 4.80mm H. All three are nonstandard form factors with comparable heights. SRR7045-221M offers the smallest footprint area.

Q: Why does SRR7045-221M have significantly lower DC resistance?

A: SRR7045-221M employs drum core wirewound construction, which inherently produces lower resistance compared to the shielded inductor designs of the Sumida parts. This results in 700 mOhm DCR versus 1.17-1.31 Ohm, reducing power dissipation and heat generation in high-current applications.

Q: Are all three parts RoHS3 compliant?

A: Yes. CDR74NP-221MC, CDRH74NP-221MC-B, and SRR7045-221M are all RoHS3 compliant with MSL Level 1 rating, permitting unlimited moisture exposure without baking requirements.

Q: What is the difference between the tolerance specifications?

A: CDR74NP-221MC specifies -15%, +20% tolerance. CDRH74NP-221MC-B and SRR7045-221M both specify ±20% tolerance. The symmetric ±20% tolerance of the substitute parts provides more predictable inductance variation across production batches.

Q: Which substitute part should be selected for a temperature-critical application?

A: SRR7045-221M operates across -40°C to 125°C, providing the widest temperature range. CDRH74NP-221MC-B operates -40°C to 100°C. For applications requiring operation above 100°C, SRR7045-221M is the appropriate selection.

Q: Are both substitute parts available in Tape & Reel packaging?

A: Yes. CDRH74NP-221MC-B and SRR7045-221M are both supplied in Tape & Reel (TR) packaging, suitable for automated pick-and-place assembly. CDR74NP-221MC packaging format is listed as nonstandard.