CDRH125-680MC Equivalent & Substitute Parts Reference

Part Overview

The CDRH125-680MC is a 68 µH shielded surface mount inductor manufactured by Sumida America Components Inc., rated for 1.5 A continuous current with a maximum DC resistance of 120 mOhm. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for new designs and ongoing production support. The part operates across a temperature range of -25°C to 80°C and is mounted in a nonstandard 12.00mm × 12.00mm package with a seated height of 6.00mm.

Due to its obsolete status, sourcing alternatives from active product lines is essential for design continuity and long-term supply chain reliability.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Inductance	68	µH	Critical - must match exactly
Inductance Tolerance	±20%	%	Critical - must match or be tighter
Current Rating	1.5	A	Critical - substitute must meet or exceed
DC Resistance (DCR)	120	mOhm Max	Critical - substitute must not exceed
Shielding	Shielded	-	Critical - must be shielded
Mounting Type	Surface Mount	-	Critical - must be SMD
Package Dimensions	12.00 × 12.00 × 6.00	mm	Important - footprint compatibility
Operating Temperature	-25 to 80	°C	Application-dependent
RoHS Status	Non-compliant	-	Compliance requirement

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Inductance value: 68 µH (exact)
Inductance tolerance: ±20% (substitute tolerance must not be wider)
Current rating: minimum 1.5 A (substitute may exceed)
DC resistance: maximum 120 mOhm (substitute must not exceed)
Shielding: required (all substitutes must be shielded)
Mounting: Surface Mount (SMD)

Mechanical Compatibility Parameters:

Package footprint: 12.00mm × 12.00mm nominal (minor dimensional variations acceptable within industry standards)
Seated height: 6.00mm maximum
Nonstandard package classification

Compliance Parameters:

RoHS compliance status
REACH status
Moisture sensitivity level: 1 (Unlimited)

Substitute parts are classified as Direct (identical electrical and mechanical specifications with active product status) or Similar (equivalent electrical performance with minor dimensional or thermal rating variations).

Parameter Comparison

Part Number	Manufacturer	Inductance (µH)	Tolerance	Current Rating (A)	DCR Max (mOhm)	Shielding	Dimensions (mm)	Height (mm)	Product Status	RoHS Status	Temp Range (°C)
CDRH125-680MC	Sumida	68	±20%	1.5	120	Shielded	12.00 × 12.00	6.00	Obsolete	Non-compliant	-25 to 80
CDRH125NP-680MC	Sumida	68	±20%	1.5	120	Shielded	12.00 × 12.00	6.00	Active	ROHS3 Compliant	-40 to 100
PA4304.683NLT	Pulse Electronics	68	±20%	1.5	120	Shielded	12.50 × 12.50	6.00	Active	ROHS3 Compliant	-40 to 125
P1171.683NLT	Pulse Electronics	68	±20%	1.8	120	Shielded	12.24 × 12.24	6.00	Active	ROHS3 Compliant	-40 to 130
P1170.683NLT	Pulse Electronics	68	±20%	1.8	120	Shielded	12.24 × 12.24	6.00	Active	ROHS3 Compliant	-40 to 130
B82477G2683M000	EPCOS - TDK Electronics	68	±20%	1.5	120	Shielded	12.30 × 12.30	6.00	Active	ROHS3 Compliant	-55 to 125
DR125-680-R	Eaton - Electronics Division	68	±20%	2.22	101	Shielded	12.50 × 12.50	6.00	Active	ROHS3 Compliant	-40 to 125
SLF12565T-680M2R0-PF	TDK Corporation	68	±20%	2.4	94.4	Shielded	12.50 × 12.50	6.85	Not For New Designs	ROHS3 Compliant	-20 to 105

Engineering Selection Recommendations

Direct Equivalent (Recommended for Immediate Replacement):

CDRH125NP-680MC is the direct equivalent of the obsolete CDRH125-680MC. Both parts are manufactured by Sumida America Components Inc. within the CDRH125 series. The CDRH125NP-680MC maintains identical electrical specifications (68 µH, ±20%, 1.5 A, 120 mOhm DCR) and mechanical dimensions (12.00mm × 12.00mm × 6.00mm). The primary advantages are active product status and ROHS3 compliance. The extended operating temperature range (-40°C to 100°C versus -25°C to 80°C) provides improved thermal margin. This part is available in Tape & Reel packaging and carries 2446 units in current inventory.

Active Alternatives with Enhanced Current Ratings:

PA4304.683NLT (Pulse Electronics) and B82477G2683M000 (EPCOS - TDK Electronics) are functionally equivalent alternatives with identical electrical specifications. Both maintain 68 µH inductance, ±20% tolerance, 1.5 A current rating, and 120 mOhm maximum DCR. Dimensional variations are minimal (12.50mm × 12.50mm and 12.30 × 12.30mm respectively). Both are ROHS3 compliant with extended temperature ranges (-40°C to 125°C). These parts are suitable for applications where footprint tolerance permits the slight dimensional increase.

Higher Current Capacity Alternatives:

P1171.683NLT and P1170.683NLT (Pulse Electronics) provide 1.8 A current ratings while maintaining 68 µH inductance and 120 mOhm DCR. These wirewound inductors feature extended temperature operation to 130°C and self-resonant frequency of 6.9 MHz. Footprint dimensions are 12.24mm × 12.24mm. These parts are suitable for applications requiring additional current margin or higher frequency performance.

DR125-680-R (Eaton - Electronics Division) offers the highest current capacity at 2.22 A with saturation current of 2.7 A. DC resistance is reduced to 101 mOhm. Footprint is 12.50mm × 12.50mm. This part is appropriate for high-current applications where the reduced DCR provides thermal benefits.

Not Recommended for New Designs:

SLF12565T-680M2R0-PF (TDK Corporation) carries a "Not For New Designs" status despite active inventory. The seated height of 6.85mm exceeds the original specification of 6.00mm maximum, creating potential PCB clearance conflicts. This part should be avoided for new design implementations.

Frequently Asked Questions (FAQ)

Q: Can CDRH125NP-680MC directly replace CDRH125-680MC without PCB modifications?

A: Yes. CDRH125NP-680MC is dimensionally and electrically identical to CDRH125-680MC. Both occupy 12.00mm × 12.00mm footprints with 6.00mm seated height. No PCB layout changes are required. The primary difference is product status (active versus obsolete) and RoHS compliance.

Q: What is the significance of the dimensional variations in substitute parts?

A: Substitute parts with slightly larger footprints (12.24mm, 12.30mm, or 12.50mm) require verification of available PCB space. If the original design includes 0.5mm or greater clearance margins around the 12.00mm footprint, these alternatives are mechanically compatible. If PCB space is constrained, CDRH125NP-680MC remains the optimal choice.

Q: Are the higher current-rated alternatives (1.8 A and 2.22 A) suitable for 1.5 A applications?

A: Yes. Parts rated for higher current (P1171.683NLT at 1.8 A, DR125-680-R at 2.22 A) operate safely at lower current levels. The 1.5 A application requirement is fully satisfied. Higher current ratings provide additional thermal margin and reduced stress on the component.

Q: What is the impact of DC resistance differences between substitutes?

A: The original CDRH125-680MC specifies 120 mOhm maximum DCR. Substitutes with identical or lower DCR (such as DR125-680-R at 101 mOhm or SLF12565T-680M2R0-PF at 94.4 mOhm) provide improved thermal performance through reduced resistive losses. Lower DCR is advantageous and does not create compatibility issues.

Q: Why is SLF12565T-680M2R0-PF marked "Not For New Designs"?

A: The seated height of 6.85mm exceeds the original specification maximum of 6.00mm. This dimensional increase may conflict with PCB clearance requirements, component stacking, or enclosure constraints in designs originally specified for 6.00mm height. New designs should select alternatives with compliant height specifications.

Q: How do temperature operating ranges affect substitution decisions?

A: The original CDRH125-680MC operates from -25°C to 80°C. All recommended substitutes extend this range to at least -40°C to 100°C or higher. Extended temperature ranges provide design margin for applications with wider environmental requirements. If the original application operates within -25°C to 80°C, all substitutes are thermally compatible.

Q: What packaging format should be selected for production assembly?

A: CDRH125NP-680MC, PA4304.683NLT, P1171.683NLT, P1170.683NLT, B82477G2683M000, and DR125-680-R are available in Tape & Reel (TR) packaging, suitable for automated pick-and-place assembly. SLF12565T-680M2R0-PF is supplied in Cut Tape (CT) & Digi-Reel® format. Tape & Reel packaging is standard for high-volume production environments.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended active substitutes carry ROHS3 compliance certification. The original CDRH125-680MC is RoHS non-compliant. Migration to CDRH125NP-680MC or other compliant alternatives ensures regulatory alignment for new production and export markets.

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