TE Connectivity 3625B331KT Equivalent & Substitute Parts

Part Overview

The TE Connectivity 3625B331KT is a 330 µH unshielded wirewound inductor rated for 620 mA continuous current with a maximum DC resistance of 950 mOhm. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and procurement needs. The part is surface-mounted in a nonstandard 10.00mm x 10.00mm package with a seated height of 4.80mm and operates across the temperature range of -40°C to 125°C.

Substiute Parts

3625B331KT

TE Connectivity Passive ProductIn Stock: 7753625B331KT Datasheet

Current PartRFQ

SDR1045-331K

Bourns Inc.In Stock: 2333SDR1045-331K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete TE Connectivity 3625B331KT is based on strict electrical and mechanical parameter matching. The primary substitute, Bourns SDR1045-331K, qualifies as an equivalent based on the following critical parameters:

Electrical Equivalence Criteria:

• Identical inductance value: 330 µH
• Identical inductance tolerance: ±10%
• Identical current rating: 620 mA
• Identical saturation current: 700 mA
• Identical Q factor: 12 @ 796 kHz
• Identical operating temperature range: -40°C to 125°C

Mechanical Equivalence Criteria:

• Identical package dimensions: 10.00mm x 10.00mm
• Identical seated height: 4.80mm
• Surface mount configuration
• Nonstandard package classification

Compliance Equivalence:

• Both parts are ROHS3 compliant
• Both parts have MSL 1 rating (Unlimited moisture sensitivity)

The Bourns SDR1045-331K differs in core material (ferrite drum core versus unspecified wirewound core) and DC resistance specification (1.7 Ohm maximum versus 950 mOhm maximum). These differences represent trade-offs in performance characteristics while maintaining functional equivalence for the specified electrical and thermal operating parameters.

Parameter Comparison

Engineering Selection Recommendations

The Bourns SDR1045-331K serves as the primary active equivalent for the obsolete TE Connectivity 3625B331KT. Selection of this substitute is supported by the following engineering factors:

Product Status Alignment: The SDR1045-331K maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete 3625B331KT.

Regulatory Compliance: Both components meet ROHS3 compliance requirements. The Bourns part provides defined REACH compliance status (REACH Unaffected), whereas the TE Connectivity part lists REACH status as vendor undefined. This represents an improvement in regulatory documentation clarity.

Electrical Performance: Identical inductance, tolerance, current rating, saturation current, and Q factor specifications ensure functional equivalence in circuit applications. The operating temperature range remains consistent across both parts.

Mechanical Compatibility: Identical package dimensions and seated height enable direct footprint compatibility on existing printed circuit board designs without layout modifications.

DC Resistance Consideration: The SDR1045-331K exhibits higher maximum DC resistance (1.7 Ohm versus 950 mOhm). This parameter difference must be evaluated within the context of the specific application circuit. Applications sensitive to inductor losses or thermal dissipation require circuit-level analysis to confirm acceptability of the increased resistance specification.

Frequently Asked Questions (FAQ)

Q: Can the Bourns SDR1045-331K be used as a direct replacement for the TE Connectivity 3625B331KT?

A: The Bourns SDR1045-331K qualifies as an electrical and mechanical equivalent based on matching inductance, current rating, saturation current, Q factor, operating temperature range, and package dimensions. The primary design consideration is the higher DC resistance specification (1.7 Ohm maximum versus 950 mOhm maximum). Applications where inductor losses directly impact circuit performance require evaluation of this parameter difference.

Q: What are the key electrical parameters that determine substitution eligibility?

A: Substitution eligibility is determined by matching the following parameters: inductance value (330 µH), inductance tolerance (±10%), continuous current rating (620 mA), saturation current (700 mA), Q factor (12 @ 796 kHz), and operating temperature range (-40°C to 125°C). All substitute parts must meet or exceed these specifications.

Q: Are the package dimensions identical between the two parts?

A: Yes. Both the TE Connectivity 3625B331KT and Bourns SDR1045-331K share identical package dimensions of 10.00mm length by 10.00mm width with a maximum seated height of 4.80mm. Direct footprint compatibility is confirmed.

Q: What is the significance of the core material difference?

A: The TE Connectivity part uses a wirewound core with unspecified material, while the Bourns part uses a ferrite drum core with wirewound construction. The ferrite core material in the Bourns part contributes to the higher DC resistance specification. Both configurations deliver the specified inductance and Q factor performance at the test frequency of 796 kHz.

Q: How does the DC resistance difference affect circuit performance?

A: The Bourns SDR1045-331K exhibits 1.7 Ohm maximum DC resistance compared to 950 mOhm maximum for the TE Connectivity part. This represents approximately 1.79 times higher resistance. In applications where inductor losses contribute significantly to power dissipation or thermal management, this difference requires circuit-level analysis. Low-loss applications may require alternative substitutes with lower DC resistance specifications.

Q: Are both parts compliant with current regulatory standards?

A: Both parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. The Bourns part provides explicit REACH compliance documentation (REACH Unaffected), while the TE Connectivity part lists REACH status as vendor undefined. For applications requiring documented REACH compliance, the Bourns part provides superior regulatory clarity.

Q: What is the inventory status of these parts?

A: The TE Connectivity 3625B331KT is obsolete with 690 pieces available as new original stock. The Bourns SDR1045-331K maintains active production status with 2254 pieces available as new original stock in tape and reel packaging, providing superior long-term availability assurance.