CDR95NP-331MC Equivalent & Substitute Parts

Part Overview

The CDR95NP-331MC is a 330 µH unshielded drum core wirewound inductor manufactured by Sumida America Components Inc., rated for 550 mA continuous current with a maximum DC resistance of 1 Ohm. This surface mount component operates across the temperature range of -40°C to 100°C and is ROHS3 compliant with MSL 1 rating.

The CDR95NP-331MC is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this inductor specification.

Substiute Parts

CDR95NP-331MC

Sumida America Components Inc.In Stock: 786CDR95NP-331MC Datasheet

Current PartRFQ

P0752.334NLT

Pulse ElectronicsIn Stock: 6340P0752.334NLT Datasheet

DirectRFQ

SDR1005-331KL

Bourns Inc.In Stock: 1498SDR1005-331KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CDR95NP-331MC are identified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Inductance value: 330 µH (exact match required)
• Inductance tolerance: ±20% or better
• Current rating: minimum 550 mA continuous
• DC resistance: maximum 1 Ohm or lower
• Shielding configuration: unshielded
• Mounting type: surface mount
• Operating temperature range: minimum -40°C to 100°C coverage
• RoHS compliance: ROHS3 compliant

Substitute Classification:

Direct Substitute: P0752.334NLT (Pulse Electronics) meets all primary matching criteria with equivalent inductance, improved current rating (600 mA), comparable DC resistance (1.02 Ohm Max), and extended operating temperature range (-40°C to 130°C).

Similar Substitute: SDR1005-331KL (Bourns Inc.) matches inductance and current rating specifications with improved inductance tolerance (±10%), comparable DC resistance (1.15 Ohm Max), and extended operating temperature range (-40°C to 125°C). This part provides additional performance data including Q factor and self-resonant frequency.

Parameter Comparison

Engineering Selection Recommendations

For P0752.334NLT (Pulse Electronics):

This part is recommended as the primary direct substitute. It maintains active product status, ensuring long-term availability and supply chain stability. The part meets all electrical specifications with equivalent inductance (330 µH) and tolerance (±20%). The current rating of 600 mA exceeds the original 550 mA requirement, providing design margin. DC resistance of 1.02 Ohm Max is within acceptable tolerance of the original 1 Ohm specification. Extended operating temperature range (-40°C to 130°C) provides broader environmental coverage. ROHS3 compliance and MSL 1 rating match the original part. Physical dimensions are nearly identical (0.510" x 0.370" vs. 0.508" x 0.370"), ensuring PCB layout compatibility with minimal adjustment.

For SDR1005-331KL (Bourns Inc.):

This part is recommended as a secondary similar substitute. It maintains active product status with established supply availability. The part matches the original inductance (330 µH) with improved tolerance (±10% vs. ±20%), providing tighter inductance control. Current rating of 550 mA matches the original specification exactly. DC resistance of 1.15 Ohm Max represents a 15% increase over the original 1 Ohm specification and must be evaluated for circuit performance impact. Extended operating temperature range (-40°C to 125°C) provides broader environmental coverage. ROHS3 compliance and MSL 1 rating match the original part. Physical dimensions show minor variations (0.500" x 0.394" vs. 0.508" x 0.370"), requiring PCB layout verification. Additional performance data (Q factor of 56 @ 70kHz and self-resonant frequency of 4 MHz) is available for detailed circuit analysis.

Selection Basis:

Both substitute parts are ROHS3 compliant with MSL 1 ratings, matching the original part's regulatory and environmental requirements. Both are classified as active products, ensuring ongoing manufacturer support and supply chain availability. Selection between these substitutes should be based on specific circuit requirements regarding DC resistance tolerance, operating temperature requirements, and PCB layout constraints.

Frequently Asked Questions (FAQ)

Q: Can P0752.334NLT be used as a direct replacement for CDR95NP-331MC?

A: Yes. P0752.334NLT meets all primary electrical specifications: 330 µH inductance, ±20% tolerance, 600 mA current rating (exceeds 550 mA requirement), 1.02 Ohm Max DC resistance (within tolerance of 1 Ohm specification), unshielded configuration, and surface mount packaging. Physical dimensions are nearly identical. ROHS3 compliance and MSL 1 rating match the original part.

Q: What is the difference between the two substitute parts?

A: P0752.334NLT (Pulse Electronics) offers higher current rating (600 mA vs. 550 mA) and lower DC resistance tolerance (1.02 Ohm vs. 1.15 Ohm). SDR1005-331KL (Bourns Inc.) provides tighter inductance tolerance (±10% vs. ±20%) and includes published Q factor and self-resonant frequency specifications. Both extend operating temperature range beyond the original part.

Q: Are there physical size differences that affect PCB layout?

A: Minor dimensional variations exist. P0752.334NLT dimensions (0.510" x 0.370" x 0.215" max height) are nearly identical to the original CDR95NP-331MC (0.508" x 0.370" x 0.205" max height). SDR1005-331KL dimensions (0.500" x 0.394" x 0.197" max height) show slightly greater width and reduced height. PCB layout verification is recommended for SDR1005-331KL to confirm clearance and mounting compatibility.

Q: How does DC resistance affect circuit performance?

A: The original CDR95NP-331MC specifies 1 Ohm Max DC resistance. P0752.334NLT at 1.02 Ohm Max represents a 2% increase. SDR1005-331KL at 1.15 Ohm Max represents a 15% increase. Higher DC resistance increases power dissipation and voltage drop across the inductor. Circuit analysis is required to confirm SDR1005-331KL compatibility if DC resistance is a critical design parameter.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both P0752.334NLT and SDR1005-331KL are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the original CDR95NP-331MC specifications.

Q: Why is the original CDR95NP-331MC classified as obsolete?

A: The CDR95NP-331MC is an obsolete product from Sumida America Components Inc. Both substitute parts are active products from established manufacturers (Pulse Electronics and Bourns Inc.), ensuring continued availability and manufacturer support for new designs and production requirements.

Q: What is the saturation current difference between parts?

A: The original CDR95NP-331MC specifies Isat of 800 mA. P0752.334NLT specifies Isat of 600 mA. SDR1005-331KL specifies Isat of 600 mA. Both substitutes have lower saturation current ratings. Circuit analysis is required to confirm that peak current levels remain below the 600 mA saturation threshold of the substitute parts.

Q: Can these parts be used interchangeably in existing designs?

A: P0752.334NLT can be used as a direct replacement with minimal design changes due to nearly identical physical dimensions and electrical specifications. SDR1005-331KL requires PCB layout verification due to dimensional variations and should be evaluated for DC resistance impact on circuit performance. Both parts maintain ROHS3 compliance and MSL 1 ratings.