34L683C Equivalent & Substitute Parts

Part Overview

The 34L683C is a 68 µH shielded wirewound inductor manufactured by Murata Power Solutions, designed for surface mount applications with a current rating of 280 mA and maximum DC resistance of 2.13Ohm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part operates across the industrial temperature range of -40°C to 125°C and meets RoHS compliance requirements.

Key Parameters

Parameter	Value
Inductance	68 µH
Inductance Tolerance	±20%
Current Rating	280 mA
DC Resistance (DCR)	2.13Ohm Max
Shielding	Shielded
Mounting Type	Surface Mount
Operating Temperature Range	-40°C to 125°C
Size	0.205" L x 0.205" W (5.20mm x 5.20mm)
Height - Seated (Max)	0.047" (1.20mm)
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution of the 34L683C is based on the following critical parameters that must align for functional equivalence:

Inductance Value: 68 µH (primary electrical specification)
Shielding Type: Shielded configuration required
Mounting Technology: Surface mount compatibility
Current Rating: Minimum 280 mA to support circuit requirements
Operating Temperature: -40°C to 125°C range
DC Resistance: Lower DCR values are acceptable as they represent improved performance
Compliance: RoHS compliance status

The SRR4011-680YL from Bourns Inc. meets these substitution criteria with enhanced electrical characteristics and active product status.

Parameter Comparison

Parameter	34L683C (Murata)	SRR4011-680YL (Bourns)	Compatibility
Inductance	68 µH	68 µH	Match
Inductance Tolerance	±20%	±30%	Acceptable
Current Rating (Amps)	280 mA	350 mA	Exceeds requirement
DC Resistance (DCR)	2.13Ohm Max	1.8Ohm Max	Improved
Shielding	Shielded	Shielded	Match
Operating Temperature	-40°C to 125°C	-40°C to 125°C	Match
Mounting Type	Surface Mount	Surface Mount	Match
Size (L x W)	0.205" x 0.205" (5.20mm x 5.20mm)	0.189" x 0.189" (4.80mm x 4.80mm)	Footprint compatible
Height - Seated (Max)	0.047" (1.20mm)	0.051" (1.30mm)	Acceptable
RoHS Status	RoHS Compliant	ROHS3 Compliant	Match
Product Status	Obsolete	Active	Preferred

Engineering Selection Recommendations

The SRR4011-680YL is the qualified substitute for the 34L683C based on the following factors:

Electrical Equivalence: Both components provide 68 µH inductance with shielded construction. The SRR4011-680YL exceeds the current rating requirement (350 mA vs. 280 mA) and provides superior DC resistance performance (1.8Ohm vs. 2.13Ohm), resulting in reduced power dissipation.

Compliance Status: The SRR4011-680YL maintains RoHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The 34L683C, while RoHS compliant, carries obsolete product status.

Physical Compatibility: The SRR4011-680YL footprint (4.80mm x 4.80mm) is smaller than the original (5.20mm x 5.20mm), ensuring PCB layout compatibility. Height variation (1.30mm vs. 1.20mm) remains within acceptable assembly tolerances for surface mount applications.

Availability and Support: The SRR4011-680YL maintains active product status with established supply channels, providing long-term design continuity compared to the obsolete 34L683C.

Frequently Asked Questions (FAQ)

Q: Can the SRR4011-680YL directly replace the 34L683C without circuit modification?

A: Yes. Both components share identical inductance values (68 µH), operating temperature ranges (-40°C to 125°C), and shielded surface mount construction. The SRR4011-680YL's higher current rating and lower DC resistance represent performance improvements that do not require circuit redesign.

Q: What is the significance of the different inductance tolerances (±20% vs. ±30%)?

A: The 34L683C specifies ±20% tolerance while the SRR4011-680YL specifies ±30%. For circuits designed to the 34L683C tolerance, the SRR4011-680YL remains functionally compatible. If tolerance-critical applications require tighter specifications, component selection should be verified against circuit performance requirements.

Q: Are there physical placement considerations due to size differences?

A: The SRR4011-680YL is physically smaller (4.80mm x 4.80mm vs. 5.20mm x 5.20mm) and slightly taller (1.30mm vs. 1.20mm). The smaller footprint provides layout flexibility. Height difference is negligible for standard surface mount assembly processes.

Q: Why is product status relevant to substitution?

A: The 34L683C is obsolete, indicating discontinued manufacturing and limited future availability. The SRR4011-680YL maintains active status, ensuring reliable supply for production and design continuity.

Q: Does the lower DC resistance of the SRR4011-680YL affect circuit performance?

A: Lower DC resistance (1.8Ohm vs. 2.13Ohm) reduces resistive losses and heat generation. This represents an improvement for power-sensitive applications and does not negatively impact circuit function.

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