CDR95NP-330MC Equivalent & Substitute Parts

Part Overview

The CDR95NP-330MC is a 33 µH unshielded ferrite core inductor manufactured by Sumida America Components Inc., rated for 2 A continuous current with a maximum DC resistance of 102 mOhm. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design support and procurement.

The part is designed for surface mount applications in nonstandard package configurations, operating across the temperature range of -40°C to 100°C. Due to its obsolete status, equivalent alternatives from active product lines are required to maintain design continuity and ensure long-term component availability.

Key Parameters

Parameter	Value	Unit
Inductance	33	µH
Inductance Tolerance	±20	%
Current Rating	2	A
Current - Saturation (Isat)	2.4	A
DC Resistance (DCR) Maximum	102	mOhm
Shielding	Unshielded	—
Material - Core	Ferrite	—
Operating Temperature Range	-40 to 100	°C
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the CDR95NP-330MC is determined by the following critical parameters:

Primary Matching Criteria:

Inductance value: 33 µH (fixed requirement)
Inductance tolerance: ±20% (acceptable range)
Current rating: minimum 2 A continuous
DC resistance: maximum 102 mOhm (preferred) to 120 mOhm (acceptable)
Shielding configuration: unshielded (preferred for EMI characteristics)
Core material: ferrite (preferred for performance consistency)
Mounting type: surface mount, nonstandard package
Operating temperature: minimum -40°C to 100°C overlap required
RoHS3 compliance: mandatory for regulatory alignment

Substitution Categories:

Direct Equivalents meet all primary criteria with minimal parameter variance and identical inductance specifications.

Compatible Alternatives satisfy inductance, current rating, and thermal requirements with acceptable variations in DC resistance or saturation current within engineering tolerances.

Limited Compatibility parts meet core electrical specifications but present trade-offs in temperature range, shielding configuration, or package dimensions requiring design review.

Parameter Comparison

Part Number	Manufacturer	Inductance (µH)	Tolerance (%)	Current Rating (A)	Isat (A)	DCR Max (mOhm)	Shielding	Core Type	Temp Range (°C)	Status
CDR95NP-330MC	Sumida America	33	±20	2.0	2.4	102	Unshielded	Ferrite	-40 to 100	Obsolete
P0751.333NLT	Pulse Electronics	33	±20	2.0	2.0	120	Unshielded	—	-40 to 130	Active
SDR1005-330KL	Bourns Inc.	33	±10	1.8	2.0	120	Unshielded	Ferrite	-40 to 125	Active
B82476A1333M000	EPCOS - TDK Electronics	33	±20	2.1	2.0	88	Unshielded	Ferrite	-55 to 150	Active
IDC5020ER330M	Vishay Dale	33	±20	2.1	2.0	100	Unshielded	Ferrite	-40 to 125	Active
UP2B-330-R	Eaton - Electronics Division	33	±20	2.1	1.7	91.7	Unshielded	Ferrite	-40 to 85	Active
DRA124-330-R	Eaton - Electronics Division	33	±20	1.98	3.42	108	Shielded	—	-40 to 165	Active
B82476B1473M100	EPCOS - TDK Electronics	47	±20	1.95	1.6	120	Unshielded	Ferrite	-55 to 150	Active

Engineering Selection Recommendations

Tier 1 - Direct Equivalents (Preferred Selection):

IDC5020ER330M (Vishay Dale) and B82476A1333M000 (EPCOS - TDK Electronics) are the primary recommended substitutes. Both parts maintain 33 µH inductance, support 2.0+ A continuous current, and feature ferrite core construction with unshielded configuration. IDC5020ER330M presents 100 mOhm maximum DCR, closely matching the original 102 mOhm specification. B82476A1333M000 offers superior DCR performance at 88 mOhm maximum with extended temperature range (-55°C to 150°C). Both are ROHS3 compliant and actively manufactured.

Tier 2 - Compatible Alternatives (Secondary Selection):

P0751.333NLT (Pulse Electronics) meets all electrical specifications with 120 mOhm maximum DCR and extended upper temperature rating to 130°C. This wirewound construction part is actively produced and ROHS3 compliant. UP2B-330-R (Eaton) provides 33 µH inductance with 2.1 A rating and 91.7 mOhm DCR, though operating temperature maximum is limited to 85°C, requiring thermal design verification for applications exceeding this threshold.

Tier 3 - Limited Compatibility (Design Review Required):

SDR1005-330KL (Bourns Inc.) delivers tighter inductance tolerance (±10%) and ferrite core construction but is rated for 1.8 A continuous current, below the original 2.0 A specification. This part is suitable only for applications where actual current demand does not exceed 1.8 A. DRA124-330-R (Eaton) features shielded construction, diverging from the unshielded original design; this configuration change requires EMI/RFI impact assessment before implementation.

Not Recommended:

B82476B1473M100 (EPCOS - TDK Electronics) specifies 47 µH inductance, exceeding the 33 µH requirement by 42%. This inductance mismatch disqualifies it as a direct substitute despite electrical current and temperature ratings.

Frequently Asked Questions (FAQ)

Q1: Can P0751.333NLT replace CDR95NP-330MC in all applications?

P0751.333NLT is electrically compatible, maintaining 33 µH inductance and 2.0 A current rating. The 18 mOhm increase in maximum DCR (120 mOhm vs. 102 mOhm) is within acceptable engineering tolerance for most applications. Extended temperature rating to 130°C provides additional thermal margin. Verification is required only if circuit design depends on DCR values below 110 mOhm.

Q2: Why is SDR1005-330KL listed as a substitute if its current rating is only 1.8 A?

SDR1005-330KL maintains the 33 µH inductance specification and operates within the required temperature range. The 1.8 A rating is acceptable for applications where actual operating current does not exceed this threshold. Design review of circuit current demands is necessary before selection.

Q3: What is the significance of shielding differences between CDR95NP-330MC and DRA124-330-R?

The original CDR95NP-330MC is unshielded; DRA124-330-R is shielded. Shielding reduces radiated EMI but increases package size and may alter circuit impedance characteristics. Selection of DRA124-330-R requires electromagnetic compatibility assessment and physical layout verification.

Q4: How do inductance tolerances affect substitution decisions?

CDR95NP-330MC specifies ±20% tolerance. All recommended substitutes maintain this tolerance or tighter (SDR1005-330KL at ±10%). Tighter tolerances provide improved circuit performance predictability. Applications sensitive to inductance variation should prioritize parts with ±10% tolerance.

Q5: Are all substitute parts ROHS3 compliant?

All listed substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's regulatory and handling requirements.

Q6: What is the impact of operating temperature range differences?

CDR95NP-330MC operates -40°C to 100°C. Substitutes offer extended ranges: P0751.333NLT to 130°C, B82476A1333M000 to 150°C, and DRA124-330-R to 165°C. Extended ranges provide design flexibility for high-temperature applications. Conversely, UP2B-330-R is limited to 85°C maximum, restricting use in elevated-temperature environments.

Q7: Which substitute offers the lowest DC resistance?

B82476A1333M000 provides the lowest maximum DCR at 88 mOhm, compared to the original 102 mOhm. This 12% reduction in resistance decreases power dissipation and heat generation, beneficial for thermally constrained designs.

Q8: Can B82476B1473M100 be used as a substitute?

No. B82476B1473M100 specifies 47 µH inductance, a 42% increase from the required 33 µH. This inductance mismatch causes circuit frequency response and impedance changes, making it unsuitable as a direct substitute regardless of other electrical parameters.

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