CLF10040T-680M Equivalent & Substitute Parts

Part Overview

The CLF10040T-680M is a 68 µH shielded drum core wirewound inductor manufactured by TDK Corporation, rated for 1.1 A continuous current with a maximum DC resistance of 216 mOhm. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates across the industrial temperature range of -40°C to 105°C and is suitable for surface mount applications in power conversion and filtering circuits.

Key Parameters

Parameter	Value
Inductance	68 µH
Inductance Tolerance	±20%
Current Rating	1.1 A
Saturation Current (Isat)	1.6 A
DC Resistance (DCR)	216 mOhm Max
Core Material	Ferrite
Shielding	Shielded
Operating Temperature	-40°C to 105°C
Mounting Type	Surface Mount
Package Type	Nonstandard
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the CLF10040T-680M is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Substitution Criteria:

Inductance value: 68 µH (fixed requirement)
Inductance tolerance: ±20% or tighter
Core material: Ferrite shielded construction
Shielding: Shielded configuration
Mounting type: Surface mount
Moisture sensitivity: MSL 1 or better

Secondary Compatibility Parameters:

Current rating: Minimum 1.1 A (higher ratings acceptable)
DC resistance: Maximum 216 mOhm (lower values acceptable)
Saturation current: Minimum 1.6 A (higher values acceptable)
Operating temperature range: Must encompass -40°C to 105°C minimum
Package footprint: Physical dimensions must be compatible with PCB layout constraints

Substitute parts are grouped by their ability to meet or exceed these parameters while maintaining functional equivalence in power conversion and filtering applications.

Parameter Comparison

Part Number	Manufacturer	Inductance	Tolerance	Current Rating (A)	Isat (A)	DCR (mOhm)	Temp Range (°C)	Status
CLF10040T-680M	TDK	68 µH	±20%	1.1	1.6	216 Max	-40 to 105	Obsolete
VLS6045EX-680M	TDK	68 µH	±20%	1.0	1.4	310	-40 to 105	Active
ASPI-104S-680M-T	Abracon LLC	68 µH	±20%	1.42	1.5	213 Max	-40 to 85	Active
BPSC00101140680M00	Pulse Electronics	68 µH	±20%	—	1.4	204 Max	-40 to 125	Active
BPSC00101140680T00	Pulse Electronics	68 µH	±30%	—	1.4	204 Max	-40 to 125	Active
CDMPIH10D48T125NP-680MC	Sumida America	68 µH	±20%	1.4	1.85	214 Max	-40 to 125	Active
CDRH104RT125NP-680MC	Sumida America	68 µH	±20%	1.25	1.57	216 Max	-40 to 125	Active
CDRH10D43RNP-680MC	Sumida America	68 µH	±20%	1.4	2.2	217.3 Max	-40 to 105	Active
CDRR105NP-680MC	Sumida America	68 µH	±20%	1.38	0.98	195 Max	-40 to 125	Active
DRA124-680-R	Eaton Electronics	68 µH	±20%	1.454	2.369	201	-40 to 165	Active
SRU1038-680Y	Bourns Inc.	68 µH	±30%	1.1	1.3	166	-40 to 125	Active

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Highest Compatibility):

CDRH104RT125NP-680MC (Sumida America) provides the closest electrical match with identical current rating (1.25 A exceeds 1.1 A requirement), matching DCR specification (216 mOhm Max), and extended operating temperature range (-40°C to 125°C). AEC-Q200 automotive qualification and RoHS compliance support production continuity. Physical dimensions (10.20mm × 10.00mm × 4.00mm) are compatible with CLF10040T-680M footprint.

CDMPIH10D48T125NP-680MC (Sumida America) offers superior saturation current (1.85 A) and lower DCR (214 mOhm Max) with AEC-Q200 rating and extended temperature range (-40°C to 125°C). Slightly larger height (5.00mm) requires PCB layout verification.

Tier 2 - Functional Equivalents (Acceptable Substitution):

ASPI-104S-680M-T (Abracon LLC) meets electrical requirements with 1.42 A current rating and 213 mOhm Max DCR. Operating temperature range (-40°C to 85°C) is narrower than the original specification; verify application does not exceed 85°C maximum.

CDRH10D43RNP-680MC (Sumida America) provides 1.4 A rating with superior saturation current (2.2 A) and comparable DCR (217.3 mOhm Max). Operating temperature matches original (-40°C to 105°C).

DRA124-680-R (Eaton Electronics) offers highest current rating (1.454 A) and lowest DCR (201 mOhm) with extended temperature range (-40°C to 165°C) and AEC-Q200 qualification. Larger footprint (12.50mm × 12.50mm) requires PCB layout compatibility assessment.

Tier 3 - Marginal Substitutes (Application-Dependent):

VLS6045EX-680M (TDK) is from the same manufacturer but has reduced current rating (1.0 A, below 1.1 A requirement) and elevated DCR (310 mOhm). Acceptable only if application current does not exceed 1.0 A and higher losses are tolerable.

SRU1038-680Y (Bourns Inc.) matches current rating (1.1 A) with superior DCR (166 mOhm) but has ±30% tolerance (versus ±20%) and lower saturation current (1.3 A). Suitable for applications with relaxed inductance tolerance requirements.

BPSC00101140680M00 and BPSC00101140680T00 (Pulse Electronics) provide extended temperature range (-40°C to 125°C) and low DCR (204 mOhm Max) but lack specified current ratings. Verify application current requirements before selection.

Frequently Asked Questions (FAQ)

Q: Can VLS6045EX-680M replace CLF10040T-680M in all applications?

A: No. VLS6045EX-680M has a maximum current rating of 1.0 A, which is below the CLF10040T-680M specification of 1.1 A. This substitute is only acceptable if your circuit operates at currents not exceeding 1.0 A. Additionally, the DCR is higher (310 mOhm versus 216 mOhm Max), resulting in increased power dissipation.

Q: What is the significance of saturation current (Isat) in substitution?

A: Saturation current indicates the current level at which the inductor's core begins to saturate, causing inductance to drop significantly. The CLF10040T-680M has Isat of 1.6 A. Substitute parts with lower Isat values (such as SRU1038-680Y at 1.3 A) may saturate earlier under transient conditions, affecting circuit performance. Higher Isat values provide additional margin.

Q: Does operating temperature range affect substitution eligibility?

A: Yes. The CLF10040T-680M operates from -40°C to 105°C. Substitutes with narrower ranges (such as ASPI-104S-680M-T at -40°C to 85°C) are acceptable only if your application does not exceed the substitute's maximum temperature. Substitutes with extended ranges (such as DRA124-680-R at -40°C to 165°C) provide additional design margin.

Q: What is the impact of inductance tolerance on circuit design?

A: The CLF10040T-680M specifies ±20% tolerance. Substitutes with ±30% tolerance (BPSC00101140680T00, SRU1038-680Y) have wider inductance variation. For applications sensitive to inductance accuracy (such as resonant circuits or precision filters), maintain ±20% tolerance or tighter. For general filtering applications, ±30% tolerance is typically acceptable.

Q: Are there compliance or certification differences between substitutes?

A: Yes. CDMPIH10D48T125NP-680MC, CDRH104RT125NP-680MC, and DRA124-680-R carry AEC-Q200 automotive qualification, indicating enhanced reliability testing. BPSC and CDRR parts are RoHS3 compliant. All listed substitutes are MSL 1 (Unlimited moisture sensitivity), matching the original part. Verify your application's compliance requirements before final selection.

Q: How do physical dimensions affect substitution?

A: The CLF10040T-680M measures 10.00mm × 9.70mm × 4.10mm. Most substitutes have similar footprints (10.00–10.50mm length/width, 4.00–4.50mm height), ensuring PCB compatibility. DRA124-680-R (12.50mm × 12.50mm) and CDMPIH10D48T125NP-680MC (5.00mm height) require layout verification. Confirm PCB pad spacing and clearance before ordering.

Q: What does "shielded" mean for inductor substitution?

A: Shielded inductors use ferrite cores enclosed in a magnetic shield to contain magnetic field radiation, reducing electromagnetic interference (EMI) with adjacent components. All listed substitutes are shielded, maintaining the original part's EMI performance. Non-shielded alternatives are not acceptable substitutes.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message