CDR95NP-681MC Equivalent & Substitute Parts

Part Overview

The CDR95NP-681MC is a 680 µH unshielded drum core wirewound inductor manufactured by Sumida America Components Inc., rated for 350 mA continuous current with a maximum DC resistance of 2.363 Ohm. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing production and maintenance applications. The part operates across the temperature range of -40°C to 100°C and meets ROHS3 compliance requirements.

Key Parameters

Parameter	Value
Inductance	680 µH
Current Rating	350 mA
DC Resistance (Max)	2.363 Ohm
Tolerance	±20%
Core Type	Ferrite Drum Core
Shielding	Unshielded
Mounting Type	Surface Mount
Operating Temperature	-40°C to 100°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the CDR95NP-681MC is determined by the following critical parameters: inductance value (680 µH), current rating capability, DC resistance specification, core material composition, shielding configuration, and surface mount compatibility. All identified substitute parts maintain the 680 µH inductance specification and unshielded wirewound construction. Substitutes are grouped based on current rating alignment and DC resistance performance characteristics.

Direct substitutes meet or exceed the 350 mA current rating of the original part while maintaining comparable DC resistance values. Similar substitutes provide functional equivalence with enhanced current ratings (400 mA) or improved tolerance specifications, suitable for applications where the original part's specifications can accommodate the parameter variations.

Parameter Comparison

Parameter	CDR95NP-681MC (Main)	P0752.684NLT (Pulse)	ASPI-0804T-681M-T (Abracon)	SDR1005-681KL (Bourns)
Manufacturer	Sumida America	Pulse Electronics	Abracon LLC	Bourns Inc.
Inductance	680 µH	680 µH	680 µH	680 µH
Tolerance	±20%	±20%	±20%	±10%
Current Rating (Amps)	350 mA	400 mA	400 mA	350 mA
Current - Saturation	500 mA	400 mA	Not Specified	400 mA
DC Resistance (Max)	2.363 Ohm	2.17 Ohm	2.02 Ohm	2.6 Ohm
Core Type	Ferrite Drum Core	Wirewound	Ferrite Drum Core	Ferrite Drum Core
Shielding	Unshielded	Unshielded	Unshielded	Unshielded
Operating Temperature	-40°C to 100°C	-40°C to 130°C	-40°C to 85°C	-40°C to 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package Type	Nonstandard	Nonstandard	Nonstandard	Nonstandard
Size (L x W)	0.508" x 0.370" (12.90mm x 9.40mm)	0.510" x 0.370" (12.95mm x 9.40mm)	0.510" x 0.370" (12.95mm x 9.40mm)	0.500" x 0.394" (12.70mm x 10.00mm)
Height (Max)	0.205" (5.20mm)	0.215" (5.46mm)	0.205" (5.21mm)	0.197" (5.00mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

P0752.684NLT (Pulse Electronics) is an active substitute with enhanced current rating (400 mA) and improved DC resistance (2.17 Ohm). This part provides extended operating temperature range (-40°C to 130°C) and maintains ROHS3 compliance. The slightly increased height (0.215" vs 0.205") requires PCB layout verification for clearance-critical applications.

ASPI-0804T-681M-T (Abracon LLC) offers the lowest DC resistance (2.02 Ohm) among substitutes with ferrite drum core construction matching the original design. Current rating is 400 mA with identical height profile (0.205"). Operating temperature range is -40°C to 85°C, which is narrower than the original part. This substitute is suitable for applications operating within this temperature window.

SDR1005-681KL (Bourns Inc.) provides tighter inductance tolerance (±10% vs ±20%) and matches the original 350 mA current rating. Operating temperature extends to 125°C. DC resistance is 2.6 Ohm, representing the highest among substitutes. Dimensional variation in width (0.394" vs 0.370") requires PCB footprint compatibility assessment. This part includes specified Q factor (72 @ 96kHz) and self-resonant frequency (3MHz).

All substitute parts maintain unshielded ferrite drum core construction, surface mount compatibility, and ROHS3 compliance. Selection should be based on specific application requirements regarding current capacity, DC resistance tolerance, operating temperature range, and PCB layout constraints.

Frequently Asked Questions (FAQ)

Q: Can P0752.684NLT replace CDR95NP-681MC in all applications?

A: P0752.684NLT is functionally compatible for applications requiring 350 mA or less continuous current. The 400 mA rating provides margin above the original 350 mA specification. DC resistance is lower (2.17 Ohm vs 2.363 Ohm), reducing power dissipation. Height is 0.010" greater (5.46mm vs 5.20mm), requiring clearance verification in space-constrained designs. Extended temperature range (-40°C to 130°C) accommodates broader operating conditions.

Q: What are the key differences between ASPI-0804T-681M-T and SDR1005-681KL?

A: ASPI-0804T-681M-T features lower DC resistance (2.02 Ohm) and narrower operating temperature range (-40°C to 85°C). SDR1005-681KL provides tighter inductance tolerance (±10%), extended temperature range to 125°C, and specified Q factor. SDR1005-681KL has slightly larger width (0.394" vs 0.370"), affecting PCB footprint compatibility. Both maintain 350 mA current rating and ferrite drum core construction.

Q: Is the height difference between substitutes significant?

A: Height variations range from 0.197" (SDR1005-681KL) to 0.215" (P0752.684NLT), a maximum difference of 0.018". In applications with tight vertical clearance constraints, this difference may require PCB layout modification or component repositioning. Verify clearance to adjacent components and enclosure boundaries before substitution.

Q: Do all substitutes maintain the same inductance tolerance?

A: No. CDR95NP-681MC, P0752.684NLT, and ASPI-0804T-681M-T specify ±20% tolerance. SDR1005-681KL provides tighter ±10% tolerance, offering improved inductance accuracy. Applications requiring strict inductance specification should prioritize SDR1005-681KL.

Q: Are there temperature range limitations for substitution?

A: The original CDR95NP-681MC operates -40°C to 100°C. ASPI-0804T-681M-T has the narrowest range (-40°C to 85°C), limiting use in high-temperature applications. P0752.684NLT and SDR1005-681KL extend to 130°C and 125°C respectively, suitable for elevated-temperature environments. Verify application operating temperature against substitute specifications.

Q: What is the impact of DC resistance variation on circuit performance?

A: DC resistance ranges from 2.02 Ohm (ASPI-0804T-681M-T) to 2.6 Ohm (SDR1005-681KL). At 350 mA, power dissipation varies from 0.247W to 0.318W. Lower resistance reduces heat generation and improves efficiency. Applications sensitive to inductor losses should prioritize ASPI-0804T-681M-T. Higher resistance may require thermal management review in power-critical designs.

Q: Are all substitutes available in Tape & Reel packaging?

A: Yes. P0752.684NLT, ASPI-0804T-681M-T, and SDR1005-681KL are all supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes. Inventory availability is confirmed for all three substitutes.

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