Würth Elektronik 82555140 Varistor 24V 500A 1812 - Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 82555140 is a 24 V, 500 A varistor in 1812 (4532 Metric) surface mount package, designed for transient voltage suppression in single-circuit applications. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part operates across a temperature range of -40°C to 125°C and meets ROHS3 compliance requirements.

Substiute Parts

82555140

Würth ElektronikIn Stock: 89882555140 Datasheet

Current PartRFQ

B72580V0140K062

EPCOS - TDK ElectronicsIn Stock: 1062B72580V0140K062 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 82555140 is determined by the following critical parameters:

• Package / Case: Must be 1812 (4532 Metric) surface mount to ensure mechanical and electrical compatibility with existing PCB layouts
• Varistor Voltage Range: Nominal voltage must fall within acceptable operating parameters for the application circuit
• Current - Surge Rating: Must meet or exceed the transient current suppression requirements
• Number of Circuits: Single-circuit configuration required
• Mounting Type: Surface mount, MLCV technology
• Compliance Standards: ROHS3 compliance and REACH unaffected status required for regulatory alignment

The EPCOS - TDK Electronics B72580V0140K062 meets these substitution criteria while offering enhanced electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The B72580V0140K062 from EPCOS - TDK Electronics is a direct substitute for the obsolete 82555140. Both components share identical package geometry (1812 / 4532 Metric), mounting technology (Surface Mount MLCV), and regulatory compliance status (ROHS3 Compliant, REACH Unaffected). The substitute part maintains compatibility with existing PCB designs and assembly processes.

The B72580V0140K062 offers enhanced performance specifications: surge current rating of 800 A versus 500 A, energy dissipation of 2.3 J versus 1.7 J, and an extended lower operating temperature limit of -55°C versus -40°C. The substitute part is currently in active production status, ensuring long-term availability and supply chain stability.

Varistor voltage characteristics differ slightly between the two parts. The substitute operates at a nominal 22 V with a range of 19.8 V to 24.2 V, compared to the original 24 V nominal with a range of 21.6 V to 27 V. Circuit designers must verify that the 22 V nominal voltage of the substitute aligns with application requirements before implementation.

Frequently Asked Questions (FAQ)

Q: Can the B72580V0140K062 be used as a direct replacement for the 82555140 on existing PCBs?

A: Yes. Both components use identical 1812 (4532 Metric) surface mount packages and MLCV mounting technology. No PCB layout modifications are required. Verify that the 22 V nominal varistor voltage of the substitute meets your circuit protection requirements.

Q: What is the primary reason for substitution?

A: The 82555140 is classified as obsolete. The B72580V0140K062 is an active production part from EPCOS - TDK Electronics, providing assured long-term availability and supply continuity.

Q: How do the surge current ratings differ?

A: The original 82555140 is rated for 500 A surge current. The substitute B72580V0140K062 is rated for 800 A surge current, providing enhanced transient suppression capability.

Q: Are there compliance differences between the two parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical regulatory certifications (ECCN: EAR99, HTSUS: 8533.40.4000).

Q: What is the operating temperature range difference?

A: The original part operates from -40°C to 125°C. The substitute operates from -55°C to 125°C, providing a wider low-temperature operating window.

Q: How do the varistor voltage specifications compare?

A: The original operates at 24 V nominal (21.6 V to 27 V range). The substitute operates at 22 V nominal (19.8 V to 24.2 V range). Confirm that the lower nominal voltage of the substitute is acceptable for your application circuit.