UP2UC-680-R Equivalent & Substitute Parts Reference

Part Overview

The UP2UC-680-R is a 68 µH unshielded wirewound inductor manufactured by Eaton - Electronics Division, rated for 1.5 A continuous current with a maximum DC resistance of 200 mOhm. This surface mount component operates across the temperature range of -25°C to 85°C and is part of the UNI-PAC™ 2UC series. The part is currently active in production with RoHS compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified when applications require alternative sourcing due to inventory constraints, supply chain considerations, or when design parameters permit operation within the electrical and mechanical tolerances of alternative manufacturers' offerings.

Substiute Parts

UP2UC-680-R

Eaton - Electronics DivisionIn Stock: 779UP2UC-680-R Datasheet

Current PartRFQ

P0751.683NLT

Pulse ElectronicsIn Stock: 1669P0751.683NLT Datasheet

DirectRFQ

SDR1005-680KL

Bourns Inc.In Stock: 1926SDR1005-680KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UP2UC-680-R are qualified based on the following substitution criteria:

Electrical Parameters (Primary):

• Inductance value of 68 µH (exact match required)
• Inductance tolerance of ±20% or better
• Current rating of 1.4 A or higher (substitutes may operate at reduced current margins)
• DC resistance not exceeding 240 mOhm (acceptable increase from 200 mOhm baseline)
• Saturation current of 1.4 A or higher

Mechanical Parameters (Secondary):

• Surface mount package type
• Nonstandard package case compatible with 12.70 x 10.00 mm footprint
• Height seated maximum of 5.46 mm or less (accommodates PCB clearance requirements)

Environmental & Compliance Parameters:

• Operating temperature range of -40°C to 125°C or better (exceeds -25°C to 85°C requirement)
• RoHS3 compliance or equivalent
• MSL 1 (Unlimited) moisture sensitivity rating
• ECCN EAR99 classification

The two qualified substitutes—P0751.683NLT (Pulse Electronics) and SDR1005-680KL (Bourns Inc.)—meet these criteria with documented electrical equivalence and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

UP2UC-680-R (Primary Part): The UP2UC-680-R remains the preferred selection when available. It delivers the highest current rating (1.5 A) with the lowest DC resistance (200 mOhm), providing optimal thermal performance and the narrowest operating temperature specification at the lower bound (-25°C). RoHS compliance and active production status ensure long-term availability and supply chain stability.

P0751.683NLT (Pulse Electronics) - Preferred Substitute: The P0751.683NLT is the primary substitute option. It maintains electrical equivalence with 68 µH inductance and 1.4 A current rating. The 40 mOhm increase in DC resistance (240 mOhm vs. 200 mOhm) results in marginally higher power dissipation but remains within acceptable thermal margins for most applications. The extended operating temperature range (-40°C to 130°C) provides superior environmental coverage. ROHS3 compliance and active production status confirm regulatory alignment and supply continuity. Footprint dimensions (12.95 x 9.40 mm) are slightly larger in length but compatible with standard PCB layouts.

SDR1005-680KL (Bourns Inc.) - Secondary Substitute: The SDR1005-680KL serves as a secondary substitute when P0751.683NLT is unavailable. This part features a ferrite drum core construction with tighter inductance tolerance (±10% vs. ±20%), providing superior inductance stability. The 1.2 A current rating represents a 20% reduction from the primary part, requiring verification that application current demands do not exceed this threshold. DC resistance matches P0751.683NLT at 240 mOhm. The self-resonant frequency of 11 MHz and Q factor of 24 @ 2.2 MHz indicate favorable high-frequency characteristics. Footprint dimensions (12.70 x 10.00 mm) match the primary part exactly, with reduced height (5.00 mm vs. 5.21 mm). ROHS3 compliance and active production status confirm regulatory and supply chain viability.

Selection Criteria Summary:

• Current requirement ≤ 1.2 A: All three parts are suitable; SDR1005-680KL offers tighter tolerance
• Current requirement 1.2 A to 1.4 A: UP2UC-680-R or P0751.683NLT required
• Current requirement > 1.4 A: UP2UC-680-R required
• Temperature range -25°C to 85°C: All three parts suitable
• Temperature range below -25°C or above 85°C: P0751.683NLT or SDR1005-680KL required
• Tight inductance tolerance critical: SDR1005-680KL (±10%) preferred
• Lowest power dissipation priority: UP2UC-680-R (200 mOhm DCR)

Frequently Asked Questions (FAQ)

Q: Can P0751.683NLT be used as a direct replacement for UP2UC-680-R?

A: Yes, with current derating consideration. The P0751.683NLT maintains the same 68 µH inductance and 1.4 A saturation current. The primary difference is the 1.4 A continuous current rating versus 1.5 A on the UP2UC-680-R. If your application operates at or below 1.4 A, substitution is direct. If continuous current exceeds 1.4 A, thermal analysis is required to confirm the 40 mOhm increase in DC resistance does not create unacceptable power dissipation.

Q: What is the impact of the 40 mOhm increase in DC resistance?

A: DC resistance directly affects power dissipation according to P = I²R. At 1.4 A continuous current, the UP2UC-680-R dissipates 0.392 W (1.4² × 0.200), while P0751.683NLT dissipates 0.470 W (1.4² × 0.240). This 0.078 W increase (20% higher dissipation) requires verification that PCB thermal design and ambient conditions accommodate the additional heat. For applications with thermal margin, this difference is negligible.

Q: Why does SDR1005-680KL have a lower current rating (1.2 A) than the other parts?

A: The SDR1005-680KL uses a ferrite drum core construction, which exhibits different saturation characteristics than the wirewound designs of the other two parts. The 1.2 A continuous rating reflects the thermal and saturation performance of this specific core material and winding configuration. The saturation current (Isat) remains 1.4 A, indicating the part can handle transient overcurrent to this level before inductance degradation occurs.

Q: Are there footprint compatibility issues between these three parts?

A: Minor footprint variations exist. The UP2UC-680-R and SDR1005-680KL share identical footprints (12.70 x 10.00 mm), enabling direct PCB layout compatibility. The P0751.683NLT footprint is slightly larger (12.95 x 9.40 mm), with 0.25 mm additional length and 0.60 mm reduced width. Height differences are minimal (5.21 mm, 5.46 mm, and 5.00 mm respectively). For most applications, these variations are accommodated within standard PCB design tolerances. Verify specific board layout constraints before substitution.

Q: Which substitute part should I select if both are available?

A: Selection depends on application requirements. If continuous current is 1.2 A or below and inductance tolerance is critical, SDR1005-680KL is preferred due to ±10% tolerance. If continuous current ranges from 1.2 A to 1.4 A and extended temperature operation is required, P0751.683NLT is preferred. If current demand approaches 1.5 A, the primary UP2UC-680-R part is required.

Q: Are all three parts RoHS compliant?

A: Yes. The UP2UC-680-R carries RoHS Compliant certification. Both P0751.683NLT and SDR1005-680KL carry ROHS3 Compliant certification, which represents the current regulatory standard. All three parts meet RoHS requirements for lead-free construction and restricted substance compliance.

Q: What is the difference between the inductance test frequencies (100 kHz vs. 1 kHz)?

A: Inductance values are frequency-dependent due to core permeability characteristics. The UP2UC-680-R and P0751.683NLT are tested at 100 kHz, while SDR1005-680KL is tested at 1 kHz. Both test frequencies are standard industry practice for their respective part types. At the application operating frequency, all three parts deliver 68 µH ±tolerance. If your circuit operates at frequencies significantly different from these test points, frequency response curves should be consulted.

Q: Can these parts be used interchangeably in high-frequency applications?

A: Frequency response varies by construction. The UP2UC-680-R and SDR1005-680KL specify self-resonant frequencies of 10 MHz and 11 MHz respectively, indicating stable operation below these frequencies. The P0751.683NLT does not specify self-resonant frequency. For applications operating above 5 MHz, SDR1005-680KL is preferred due to documented frequency characteristics. For applications below 5 MHz, all three parts are suitable.

Q: What inventory status should influence my substitution decision?

A: The provided inventory data indicates UP2UC-680-R (714 pcs), P0751.683NLT (1595 pcs), and SDR1005-680KL (1852 pcs) are all in stock. Current availability favors the substitute parts. However, substitution decisions should prioritize electrical and thermal compatibility over inventory levels. Use substitute parts only when the primary part is unavailable or when application parameters permit operation within the substitute's electrical specifications.