NRS6045T680MMGK Equivalent & Substitute Parts

Part Overview

The NRS6045T680MMGK is a 68 µH shielded drum core wirewound inductor manufactured by Taiyo Yuden, rated for 950 mA continuous current with a maximum DC resistance of 395.2 mOhm. This surface mount component operates across the temperature range of -25°C to 125°C and is specified for 100 kHz inductance testing with a self-resonant frequency of 4 MHz.

The NRS6045T680MMGK carries a product status designation of "Not For New Designs," indicating that Taiyo Yuden has discontinued this model for new applications. Identifying equivalent and substitute parts is necessary for engineers maintaining legacy systems, managing inventory transitions, or sourcing components when original stock becomes unavailable.

Key Parameters

Parameter	Value	Unit
Inductance	68	µH
Inductance Tolerance	±20%	-
Current Rating	950	mA
Saturation Current (Isat)	1.1	A
DC Resistance (DCR)	395.2	mOhm Max
Core Material	Ferrite	-
Shielding	Shielded	-
Operating Temperature Range	-25°C to 125°C	-
Mounting Type	Surface Mount	-
Physical Size	6.00 x 6.00 x 4.50	mm (L x W x H)
Inductance Test Frequency	100	kHz
Self-Resonant Frequency	4	MHz
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution eligibility for the NRS6045T680MMGK is determined by strict alignment of the following critical parameters:

Primary Matching Criteria:

Inductance value: 68 µH
Inductance tolerance: ±20%
Current rating: 950 mA minimum
Saturation current: 1.1 A minimum
DC resistance: 395.2 mOhm maximum
Core material: Ferrite
Shielding: Shielded or Semi-Shielded
Operating temperature range: -25°C to 125°C minimum
Mounting type: Surface Mount
Physical footprint: 6.00 x 6.00 mm base dimensions
Inductance test frequency: 100 kHz

Substitution Categories:

Direct Equivalent: Parts meeting all primary criteria with identical or superior electrical performance and active product status.

Compatible Substitute: Parts meeting core electrical specifications (inductance, current rating, saturation current) with minor parameter variations in DCR, temperature range, or shielding classification that do not compromise circuit function.

Conditional Substitute: Parts with acceptable inductance and current ratings but with parameter deviations (lower saturation current, higher DCR, or semi-shielded configuration) requiring circuit-level validation.

Parameter Comparison

Parameter	NRS6045T680MMGK (Main)	LSXND6060YEL680MMG	BWVS00606045680T00	LMLP06D6M680CTAS	SDCH1V6045-680M-R	SRN6045-680M
Manufacturer	Taiyo Yuden	Taiyo Yuden	Pulse Electronics	KYOCERA AVX	Eaton - Electronics Division	Bourns Inc.
Product Status	Not For New Designs	Active	Active	Active	Active	Active
Inductance (µH)	68	68	68	68	68	68
Inductance Tolerance	±20%	±20%	±30%	±20%	±20%	±20%
Current Rating (mA)	950	950	900	900	950	900
Saturation Current (A)	1.1	1.1	1.44	1.0	1.8	1.0
DC Resistance (mOhm Max)	395.2	395.2	330	330	408	351
Core Material	Ferrite	Ferrite	Ferrite	Ferrite	Ferrite	Ferrite
Shielding	Shielded	Shielded	Shielded	Shielded	Semi-Shielded	Semi-Shielded
Operating Temperature Range	-25°C to 125°C	-25°C to 125°C	-55°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Physical Size (mm)	6.00 x 6.00 x 4.50	6.00 x 6.00 x 4.50	6.00 x 6.00 x 4.70	6.00 x 6.00 x 4.50	6.00 x 6.00 x 4.50	6.00 x 6.00 x 4.50
Inductance Test Frequency (kHz)	100	100	100	100	100	100
Self-Resonant Frequency (MHz)	4	4	-	-	-	6
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT)	Tape & Reel (TR)

Engineering Selection Recommendations

LSXND6060YEL680MMG (Taiyo Yuden)

This part represents the optimal direct equivalent. Manufactured by the same supplier as the original NRS6045T680MMGK, the LSXND6060YEL680MMG maintains identical electrical specifications including 68 µH inductance, 950 mA current rating, 1.1 A saturation current, and 395.2 mOhm maximum DC resistance. The component carries Active product status, ensuring continued availability and manufacturing support. Operating temperature range (-25°C to 125°C), shielding classification, and physical dimensions are identical. ROHS3 compliance and MSL 1 rating match the original specification. This part is suitable for direct substitution in all applications previously using the NRS6045T680MMGK.

SRN6045-680M (Bourns Inc.)

This part provides a compatible substitute with active product status. While maintaining the 68 µH inductance value and ±20% tolerance, the SRN6045-680M operates at 900 mA continuous current (50 mA below the original specification) with a 1.0 A saturation current. DC resistance is specified at 351 mOhm maximum, which is lower than the original 395.2 mOhm specification. The component features semi-shielded construction rather than full shielding. Operating temperature range extends to -40°C minimum. Physical footprint and mounting type are compatible. ROHS3 compliance and MSL 1 rating are maintained. This part is suitable for applications where the reduced current rating and semi-shielded configuration do not compromise circuit performance.

BWVS00606045680T00 (Pulse Electronics)

This part offers a compatible substitute with active product status. The BWVS00606045680T00 maintains 68 µH inductance but specifies ±30% tolerance, which is broader than the original ±20%. Current rating is 900 mA with 1.44 A saturation current. DC resistance is 330 mOhm, lower than the original specification. Shielding is fully shielded. Operating temperature range extends to -55°C minimum. Physical dimensions show a maximum height of 4.70 mm compared to 4.50 mm for the original. ROHS3 compliance and MSL 1 rating are maintained. This part is suitable for applications where the broader inductance tolerance and extended temperature range provide system benefits.

LMLP06D6M680CTAS (KYOCERA AVX)

This part provides a compatible substitute with active product status. The LMLP06D6M680CTAS maintains 68 µH inductance with ±20% tolerance and operates at 900 mA continuous current with 1.0 A saturation current. DC resistance is 330 mOhm maximum. Shielding is fully shielded. Operating temperature range is -40°C to 125°C. Physical dimensions match the original at 6.00 x 6.00 x 4.50 mm. ROHS3 compliance and MSL 1 rating are maintained. This part is suitable for applications where the reduced current rating does not impact circuit operation.

SDCH1V6045-680M-R (Eaton - Electronics Division)

This part provides a conditional substitute with active product status. The SDCH1V6045-680M-R maintains 68 µH inductance with ±20% tolerance and 950 mA current rating matching the original specification. Saturation current is 1.8 A, exceeding the original 1.1 A specification. DC resistance is 408 mOhm maximum, which exceeds the original 395.2 mOhm specification. Shielding is semi-shielded rather than fully shielded. Operating temperature range is -40°C to 125°C. Physical dimensions match the original. ROHS3 compliance and MSL 1 rating are maintained. Packaging is Cut Tape (CT) rather than Tape & Reel (TR). This part is suitable for applications where the higher DC resistance and semi-shielded configuration are acceptable, and where Cut Tape packaging is compatible with assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the LSXND6060YEL680MMG be used as a direct replacement for the NRS6045T680MMGK?

A: Yes. The LSXND6060YEL680MMG is manufactured by Taiyo Yuden and maintains identical electrical specifications including inductance value, current rating, saturation current, and DC resistance. Physical dimensions, operating temperature range, and compliance certifications are identical. This part is suitable for direct substitution.

Q: What is the primary difference between the SRN6045-680M and the original NRS6045T680MMGK?

A: The SRN6045-680M operates at 900 mA continuous current compared to 950 mA for the original part. Additionally, the SRN6045-680M features semi-shielded construction rather than full shielding. DC resistance is lower at 351 mOhm maximum. These differences require verification that the application does not depend on the higher current rating or full shielding characteristics.

Q: Why does the BWVS00606045680T00 specify ±30% inductance tolerance instead of ±20%?

A: Inductance tolerance is determined by the manufacturer's design and manufacturing process. The BWVS00606045680T00 from Pulse Electronics specifies ±30% tolerance as part of its product specification. Applications requiring tighter tolerance control should verify that this broader tolerance range is acceptable for circuit operation.

Q: Are all substitute parts available in Tape & Reel packaging?

A: No. The SDCH1V6045-680M-R from Eaton is supplied in Cut Tape (CT) packaging, while the original NRS6045T680MMGK and most substitute parts are supplied in Tape & Reel (TR) packaging. Packaging format may impact assembly line compatibility and should be verified with manufacturing processes.

Q: What is the significance of the semi-shielded versus fully shielded classification?

A: Shielding classification indicates the degree of electromagnetic field containment. Fully shielded inductors provide greater isolation from external electromagnetic interference and reduce coupling to adjacent components. Semi-shielded inductors provide partial isolation. Applications sensitive to electromagnetic coupling should verify that semi-shielded alternatives do not introduce unacceptable noise or cross-talk.

Q: Can the LMLP06D6M680CTAS be used in applications requiring 950 mA continuous current?

A: The LMLP06D6M680CTAS is rated for 900 mA continuous current, which is 50 mA below the original specification. Applications operating at or near 950 mA should not use this part. Applications operating below 900 mA may use this part without current-related concerns.

Q: What does the "Not For New Designs" status mean for the NRS6045T680MMGK?

A: "Not For New Designs" indicates that Taiyo Yuden has discontinued this model for new applications. The part may remain available from existing inventory, but the manufacturer does not recommend its use in new circuit designs. For new designs, selection from active product alternatives is recommended.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance status, matching the original NRS6045T680MMGK specification. This ensures compatibility with regulatory requirements for restricted substances in electrical and electronic equipment.

Q: How does operating temperature range affect part selection?

A: The original NRS6045T680MMGK operates from -25°C to 125°C. Substitute parts with extended lower temperature limits (-40°C or -55°C) provide broader environmental capability. Applications operating only within the -25°C to 125°C range do not require extended temperature range capability. Applications operating below -25°C require selection of parts with extended lower temperature specifications.

Q: What is the significance of DC resistance differences among substitute parts?

A: DC resistance directly impacts power dissipation and voltage drop across the inductor during current flow. Lower DC resistance reduces power loss and heat generation. The original specification is 395.2 mOhm maximum. Substitute parts with lower DC resistance (330 mOhm or 351 mOhm) provide improved efficiency. Substitute parts with higher DC resistance (408 mOhm) result in increased power dissipation. Applications with thermal constraints or efficiency requirements should consider DC resistance specifications.

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