CDRH127/LD-331MC Equivalent & Substitute Parts

Part Overview

The CDRH127/LD-331MC is a 330 µH shielded inductor manufactured by Sumida America Components Inc., rated for 1.2 A continuous current with a maximum DC resistance of 471mOhm. This surface mount component operates across the temperature range of -40°C to 100°C and is designed for applications requiring fixed inductance in compact nonstandard packages.

The CDRH127/LD-331MC is classified as obsolete. Locating equivalent and substitute parts is necessary to support ongoing production requirements, field repairs, and design continuity where this component is specified in existing assemblies.

Substiute Parts

CDRH127/LD-331MC

Sumida America Components Inc.In Stock: 1067CDRH127/LD-331MC Datasheet

Current PartRFQ

CDRH127/LDNP-331MC

Sumida America Components Inc.In Stock: 3108CDRH127/LDNP-331MC Datasheet

DirectRFQ

SCRH127/LD-331

Signal TransformerIn Stock: 854SCRH127/LD-331 Datasheet

SimilarRFQ

SLF12575T-331M1R0-H

TDK CorporationIn Stock: 3344SLF12575T-331M1R0-H Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CDRH127/LD-331MC are selected based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Primary Matching Criteria:

• Inductance value: 330 µH
• Inductance tolerance: ±20%
• DC resistance: 471mOhm maximum
• Current rating: minimum 1.2 A (or saturation current ≥ 1.2 A)
• Shielding: Shielded construction required
• Mounting type: Surface mount
• Test frequency: 1 kHz
• Operating temperature range: minimum -40°C to 100°C coverage
• Moisture sensitivity: MSL 1 (Unlimited)

Secondary Considerations:

• Package dimensions must accommodate 12.00mm × 12.00mm footprint or smaller equivalent
• Height must not exceed 8.00mm seated maximum
• RoHS and REACH compliance status for regulatory requirements

Substitute parts are grouped into two categories: direct substitutes (identical electrical and mechanical specifications with active product status) and similar substitutes (equivalent electrical performance with minor dimensional or compliance variations).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: CDRH127/LDNP-331MC

The CDRH127/LDNP-331MC is the recommended direct substitute for the obsolete CDRH127/LD-331MC. Both components are manufactured by Sumida America Components Inc. and share identical electrical specifications: 330 µH inductance, ±20% tolerance, 1.2 A current rating, and 471mOhm maximum DC resistance. The CDRH127/LDNP-331MC maintains the same physical footprint (12.00mm × 12.00mm) and height (8.00mm), ensuring direct compatibility in existing PCB layouts. The primary advantage is active product status with ROHS3 compliance and REACH affected designation, supporting current manufacturing and regulatory requirements. Inventory availability is substantial at 3052 pieces.

Secondary Substitute: SCRH127/LD-331

The SCRH127/LD-331 manufactured by Signal Transformer provides equivalent electrical performance with minor parameter variations. The current rating is 1.16 A with saturation current of 1.2 A, meeting the original 1.2 A requirement. DC resistance remains at 471mOhm maximum. Operating temperature range extends to 125°C, exceeding the original -40°C to 100°C specification. Package dimensions increase slightly to 12.50mm × 12.50mm with height maintained at 8.00mm. This component is active with ROHS3 compliance. Selection of this substitute requires verification that the slightly larger footprint accommodates the target PCB layout.

Tertiary Substitute: SLF12575T-331M1R0-H

The SLF12575T-331M1R0-H manufactured by TDK Corporation is a drum core wirewound inductor with 330 µH inductance and ±20% tolerance. Current rating is 1.0 A with saturation current of 1.0 A, which is below the original 1.2 A specification. DC resistance is 408mOhm maximum, providing lower resistance than the original component. Operating temperature range extends to 125°C. Package dimensions are 12.50mm × 12.50mm with height of 7.85mm. This component carries AEC-Q200 rating and ROHS3 compliance but is designated "Not For New Designs." Selection of this substitute is appropriate only for field repairs or legacy system support where the reduced current rating does not exceed application requirements.

Frequently Asked Questions (FAQ)

Q: Can the CDRH127/LDNP-331MC be used as a direct replacement for the CDRH127/LD-331MC?

A: Yes. The CDRH127/LDNP-331MC is a direct substitute. Both components share identical inductance (330 µH), tolerance (±20%), current rating (1.2 A), DC resistance (471mOhm maximum), shielding, mounting type, and physical dimensions (12.00mm × 12.00mm × 8.00mm height). The primary difference is product status: CDRH127/LDNP-331MC is active with ROHS3 compliance, while the original is obsolete and non-compliant.

Q: What is the key difference between the CDRH127/LDNP-331MC and SCRH127/LD-331?

A: Both components meet the 330 µH inductance, ±20% tolerance, and 471mOhm DC resistance specifications. The SCRH127/LD-331 has a slightly lower current rating (1.16 A versus 1.2 A) but achieves 1.2 A saturation current. The package footprint is marginally larger at 12.50mm × 12.50mm compared to 12.00mm × 12.00mm. Operating temperature range extends to 125°C. Verify PCB layout compatibility before selection.

Q: Is the SLF12575T-331M1R0-H suitable for applications requiring 1.2 A continuous current?

A: No. The SLF12575T-331M1R0-H is rated for 1.0 A continuous current with 1.0 A saturation current, which is below the original 1.2 A specification. This component is appropriate only for applications where the actual current requirement does not exceed 1.0 A, or for field repairs where the reduced rating is acceptable. The "Not For New Designs" status further restricts its use to legacy support.

Q: Do all substitute parts maintain the same physical footprint?

A: No. The CDRH127/LD-331MC and CDRH127/LDNP-331MC share the same 12.00mm × 12.00mm footprint. The SCRH127/LD-331 and SLF12575T-331M1R0-H both use 12.50mm × 12.50mm footprints. Verify PCB layout compatibility and available board space before selecting a substitute with different dimensions.

Q: What is the significance of RoHS and REACH compliance for substitute selection?

A: RoHS compliance indicates restriction of hazardous substances in manufacturing. REACH affected status indicates the component contains substances of very high concern. The CDRH127/LDNP-331MC is ROHS3 compliant and REACH affected, supporting current regulatory requirements. The original CDRH127/LD-331MC is non-compliant and REACH unaffected. For new production or regulated applications, select ROHS3 compliant substitutes.

Q: Can the SCRH127/LD-331 be used in applications with temperature requirements above 100°C?

A: Yes. The SCRH127/LD-331 operates across -40°C to 125°C, exceeding the original -40°C to 100°C range. This extended temperature capability makes it suitable for applications requiring operation above 100°C. However, verify that the slightly larger package dimensions (12.50mm × 12.50mm) accommodate the target PCB layout.

Q: What does "Not For New Designs" mean for the SLF12575T-331M1R0-H?

A: "Not For New Designs" indicates the manufacturer does not recommend this component for new product development. It is suitable for field repairs, legacy system support, and existing production where the component is already specified. For new designs, select the CDRH127/LDNP-331MC or SCRH127/LD-331.

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

A: Yes. All substitute parts listed are supplied in Tape & Reel (TR) packaging, matching the original component's packaging format for automated assembly compatibility.