P0751.683T Equivalent & Substitute Parts

Part Overview

The P0751.683T is a 68 µH unshielded wirewound inductor manufactured by Pulse Electronics, rated for 1.4 A with a maximum DC resistance of 240 mOhm. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing design support and production continuity. The part operates across a temperature range of -40°C to 130°C and is mounted as a surface mount device in a nonstandard package configuration.

Key Parameters

Parameter	Value
Inductance	68 µH
Inductance Tolerance	±20%
Current Rating	1.4 A
Current - Saturation (Isat)	1.4 A
DC Resistance (DCR)	240 mOhm Max
Shielding	Unshielded
Operating Temperature Range	-40°C ~ 130°C
Mounting Type	Surface Mount
Package Type	Nonstandard
Inductance Test Frequency	100 kHz

Substitute Part Grouping Explanation

Substitution eligibility for the P0751.683T is determined by the following critical parameters:

Inductance Value: Must be 68 µH
Current Rating: Must support minimum 1.4 A
DC Resistance: Must not exceed 240 mOhm
Shielding Configuration: Must be unshielded
Mounting Type: Must be surface mount
Operating Temperature Range: Must encompass -40°C to 130°C minimum
Package Compatibility: Must accommodate nonstandard form factor dimensions

Two substitute parts meet these criteria: P0751.683NLT (Pulse Electronics) and SDR1005-680KL (Bourns Inc.). Both maintain the specified inductance, current handling, and DC resistance characteristics while offering improved product status and compliance certifications.

Parameter Comparison

Parameter	P0751.683T (Main)	P0751.683NLT (Substitute)	SDR1005-680KL (Substitute)
Manufacturer	Pulse Electronics	Pulse Electronics	Bourns Inc.
Inductance	68 µH	68 µH	68 µH
Inductance Tolerance	±20%	±20%	±10%
Current Rating (Amps)	1.4 A	1.4 A	1.2 A
Current - Saturation (Isat)	1.4 A	1.4 A	1.4 A
DC Resistance (DCR)	240 mOhm Max	240 mOhm Max	240 mOhm Max
Shielding	Unshielded	Unshielded	Unshielded
Type	Wirewound	Wirewound	Drum Core, Wirewound
Operating Temperature Range	-40°C ~ 130°C	-40°C ~ 130°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Packaging	Nonstandard	Tape & Reel (TR)	Tape & Reel (TR)
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Size / Dimension	0.510" L x 0.370" W (12.95mm x 9.40mm)	0.510" L x 0.370" W (12.95mm x 9.40mm)	0.500" L x 0.394" W (12.70mm x 10.00mm)
Height - Seated (Max)	0.215" (5.46mm)	0.215" (5.46mm)	0.197" (5.00mm)

Engineering Selection Recommendations

P0751.683NLT is the primary substitute for P0751.683T. Both parts are manufactured by Pulse Electronics and share identical electrical specifications and physical dimensions. The P0751.683NLT offers active product status and ROHS3 compliance, addressing the obsolescence and regulatory limitations of the original part. Packaging is supplied in Tape & Reel format, suitable for automated assembly processes.

SDR1005-680KL serves as an alternative substitute manufactured by Bourns Inc. This part maintains the required 68 µH inductance, 240 mOhm maximum DC resistance, and unshielded configuration. The SDR1005-680KL features a ferrite drum core construction with tighter inductance tolerance (±10% versus ±20%) and active product status with ROHS3 compliance. The continuous current rating is 1.2 A, which is lower than the original 1.4 A specification. Physical dimensions differ slightly, with reduced height (0.197" versus 0.215"), and the operating temperature maximum is 125°C rather than 130°C.

Selection between these substitutes depends on application current requirements and thermal operating envelope. For applications requiring the full 1.4 A rating and 130°C upper temperature limit, P0751.683NLT is the direct replacement. For applications with lower current demands and standard operating temperatures, SDR1005-680KL provides enhanced tolerance and compliance characteristics.

Frequently Asked Questions (FAQ)

Q: Can P0751.683NLT directly replace P0751.683T without circuit modification?

A: Yes. P0751.683NLT is electrically and mechanically identical to P0751.683T, with matching inductance (68 µH), current rating (1.4 A), DC resistance (240 mOhm max), and physical dimensions. The primary differences are product status (active versus obsolete) and RoHS compliance (ROHS3 compliant versus non-compliant).

Q: What are the limitations of SDR1005-680KL as a substitute?

A: SDR1005-680KL maintains the 68 µH inductance and 240 mOhm DC resistance but has a continuous current rating of 1.2 A, which is 0.2 A lower than the original specification. The maximum operating temperature is 125°C instead of 130°C. Physical dimensions are slightly different, with reduced height. These differences require evaluation against specific application requirements.

Q: Are both substitute parts available in the same packaging format?

A: Both P0751.683NLT and SDR1005-680KL are supplied in Tape & Reel (TR) packaging, suitable for automated assembly. The original P0751.683T was supplied in nonstandard packaging. Tape & Reel format is standard for high-volume production environments.

Q: What is the significance of the inductance tolerance difference between substitutes?

A: P0751.683T and P0751.683NLT both specify ±20% inductance tolerance at 100 kHz test frequency. SDR1005-680KL specifies ±10% tolerance at 1 kHz test frequency. Tighter tolerance in SDR1005-680KL may benefit applications with strict inductance requirements, but the different test frequencies must be considered in circuit performance analysis.

Q: Are there thermal considerations when selecting between substitutes?

A: P0751.683NLT maintains the original -40°C to 130°C operating range. SDR1005-680KL operates from -40°C to 125°C. Applications requiring operation at temperatures above 125°C must use P0751.683NLT. Both parts are rated for unlimited moisture sensitivity (MSL 1).

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