Equivalent & Substitute Parts for DR74-220-R

Part Overview

The DR74-220-R is a 22 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 1.75 A continuous current with a DC resistance of 92.5mOhm and operates across the temperature range of -40°C to 125°C. The part is currently in active product status and carries ROHS3 compliance certification.

Substitute parts are necessary when the original DR74-220-R becomes unavailable due to supply constraints, inventory depletion, or when alternative sourcing strategies are required to optimize procurement costs and lead times while maintaining equivalent electrical and mechanical performance.

Substiute Parts

DR74-220-R

Eaton - Electronics DivisionIn Stock: 1653DR74-220-R Datasheet

Current PartRFQ

P1167.223NLT

Pulse ElectronicsIn Stock: 1401P1167.223NLT Datasheet

DirectRFQ

CDRH74NP-220MC-B

Sumida America Components Inc.In Stock: 9473CDRH74NP-220MC-B Datasheet

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P1167.223NL

Pulse ElectronicsIn Stock: 1811P1167.223NL Datasheet

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SLF7045T-220MR90-PF

TDK CorporationIn Stock: 25444SLF7045T-220MR90-PF Datasheet

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SRR7045-220M

Bourns Inc.In Stock: 15490SRR7045-220M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DR74-220-R is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 22 µH (exact match required)
• Inductance tolerance: ±20% (exact match required)
• Shielding: Shielded (required for EMI performance)
• Mounting type: Surface Mount (required for PCB compatibility)
• RoHS compliance: ROHS3 Compliant (regulatory requirement)

Secondary Compatibility Criteria:

• Current rating: Minimum 1.75 A (substitute must support or exceed this value)
• DC resistance: Maximum 92.5mOhm (substitute must not exceed this value to maintain thermal performance)
• Operating temperature range: Minimum -40°C to 125°C (substitute must cover or exceed this range)
• Package dimensions: Nonstandard form factor with maximum height 0.171" (4.35mm)

All identified substitute parts meet the primary matching criteria. Secondary criteria variations are documented in the parameter comparison table to enable engineering assessment of application-specific requirements.

Parameter Comparison

Engineering Selection Recommendations

Tier 1 - Direct Substitutes (Preferred):

P1167.223NL and P1167.223NLT (Pulse Electronics) are functionally equivalent to the DR74-220-R. Both parts maintain the 22 µH inductance with ±20% tolerance, shielded construction, and surface mount configuration. The Pulse parts operate across -40°C to 130°C, exceeding the original temperature range. DC resistance values of 105mOhm maximum are within acceptable tolerance for thermal performance. Both parts carry ROHS3 compliance and active product status. The primary distinction is packaging: P1167.223NL is supplied in Tray format, while P1167.223NLT is supplied in Tape & Reel format.

SRR7045-220M (Bourns Inc.) is a direct substitute with active product status and ROHS3 compliance. This part exceeds the current rating specification at 1.9 A and provides superior DC resistance at 70mOhm maximum. Operating temperature range matches the original at -40°C to 125°C. The SRR7045 series provides documented Q factor (26 @ 2.52MHz) and self-resonant frequency (21MHz) specifications.

Tier 2 - Acceptable Substitutes (Conditional):

CDRH74NP-220MC-B (Sumida America Components Inc.) meets all primary matching criteria with ferrite core construction and shielded design. However, the current rating of 1.23 A falls below the original 1.75 A specification. This part is suitable only for applications where the actual operating current does not exceed 1.23 A. Operating temperature range is limited to -40°C to 100°C, which is narrower than the original specification. ROHS3 compliance is confirmed; REACH status is vendor undefined.

Tier 3 - Legacy Substitute (Not Recommended for New Designs):

SLF7045T-220MR90-PF (TDK Corporation) carries a "Not For New Designs" product status designation. While this part meets electrical specifications with 22 µH inductance, shielded construction, and ROHS3 compliance, its legacy status indicates TDK has discontinued active support for new applications. Current rating of 1.34 A is below the original 1.75 A specification. This part is suitable only for replacement or repair of existing designs where supply continuity is critical.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a lower current rating than the DR74-220-R?

A: No, not without application-specific analysis. The DR74-220-R is rated for 1.75 A continuous current. Substitute parts with lower current ratings (such as CDRH74NP-220MC-B at 1.23 A) can only be used if the actual operating current in your circuit does not exceed the substitute's rating. Exceeding the current rating causes excessive heating and inductor saturation, degrading performance and potentially causing component failure.

Q: What is the difference between P1167.223NL and P1167.223NLT?

A: Both parts are electrically identical 22 µH inductors from Pulse Electronics with matching specifications. The difference is packaging format: P1167.223NL is supplied in Tray packaging, while P1167.223NLT is supplied in Tape & Reel (TR) format. Selection depends on your assembly process requirements. Tape & Reel format is standard for automated pick-and-place assembly; Tray format is used for manual assembly or alternative handling methods.

Q: Why is SLF7045T-220MR90-PF marked "Not For New Designs"?

A: This designation indicates that TDK has transitioned this product to end-of-life status and is no longer recommending it for new circuit designs. While existing inventory may be available, TDK provides no guarantee of continued supply or technical support. This part should be used only for replacement or repair of existing equipment where design changes are not feasible.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts carry ROHS3 compliance certification, matching the original DR74-220-R. This ensures compatibility with regulatory requirements across all major markets.

Q: What happens if I use a substitute with higher DC resistance?

A: Higher DC resistance increases power dissipation in the inductor. The Pulse Electronics parts (P1167.223NL and P1167.223NLT) have maximum DC resistance of 105mOhm compared to the original 92.5mOhm. This 12.4% increase results in proportionally higher heat generation. For applications with tight thermal budgets or high-frequency switching, this may be unacceptable. The Bourns SRR7045-220M and TDK SLF7045T-220MR90-PF offer lower DC resistance (70mOhm and 73.2mOhm respectively), reducing thermal load.

Q: Can I use a substitute with a narrower operating temperature range?

A: Only if your application operates within the substitute's temperature range. The CDRH74NP-220MC-B is limited to -40°C to 100°C, which is 25°C narrower than the original -40°C to 125°C range. If your circuit operates above 100°C, this substitute is not suitable. Verify your actual operating temperature requirements before selecting a substitute with a narrower range.

Q: What is the significance of self-resonant frequency?

A: Self-resonant frequency (SRF) indicates the frequency at which the inductor's parasitic capacitance causes it to behave as a resonant circuit rather than a pure inductor. Parts with documented SRF values (Pulse at 17MHz, Bourns at 21MHz) provide additional design margin for high-frequency applications. The original DR74-220-R does not specify SRF, which may indicate it is not characterized for high-frequency operation.

Q: Are there any compliance differences between substitute parts?

A: All parts are ROHS3 compliant and carry EAR99 ECCN classification. REACH status is consistent across all parts except CDRH74NP-220MC-B, which shows "Vendor Undefined" status. For applications requiring confirmed REACH compliance, verify directly with Sumida before selecting this part.