TE Connectivity 4-1879063-4 Equivalent & Substitute Parts

Part Overview

The TE Connectivity 4-1879063-4 is a 3.3 µF molded tantalum capacitor rated for 20 V operation in a 1411 (3528 Metric) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing production and maintenance applications. The TYTR series designation identifies this as a general-purpose tantalum capacitor suitable for standard electronic circuit applications requiring stable capacitance and low equivalent series resistance.

Substiute Parts

4-1879063-4

TE Connectivity Passive ProductIn Stock: 9074-1879063-4 Datasheet

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T494B335M035AT

KEMETIn Stock: 20271T494B335M035AT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 4-1879063-4 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 3.3 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Type: Molded tantalum (exact match required)
• ESR: 1.3 Ohm (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Package / Case: 1411 (3528 Metric) (exact match required)
• Physical Dimensions: 0.138" L x 0.110" W / 3.50mm x 2.80mm (exact match required)
• Height - Seated (Max): 0.083" (2.10mm) (exact match required)
• Manufacturer Size Code: B (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

Allowable Variation Parameters:

• Voltage - Rated: Substitute parts may have equal or higher voltage ratings than the original 20 V specification
• Manufacturer: Different manufacturers are acceptable provided all other parameters match
• Product Status: Active substitute parts are preferred for obsolete originals
• Compliance Certifications: Substitute parts may have additional certifications (RoHS, REACH compliance)

Parameter Comparison

Engineering Selection Recommendations

The KEMET T494B335M035AT is a direct functional equivalent to the TE Connectivity 4-1879063-4. All mandatory electrical and mechanical parameters are identical. The substitute part features a higher voltage rating (35 V versus 20 V), which provides additional design margin without affecting circuit performance in applications designed for 20 V operation.

The KEMET T494B335M035AT is classified as an active product, ensuring continued availability and supply chain stability compared to the obsolete TE Connectivity original. The substitute part carries ROHS3 compliance certification and includes specified lifetime performance data (2000 Hrs @ 125°C), supporting long-term reliability documentation requirements.

Both parts share identical moisture sensitivity classification (MSL 1 - Unlimited), eliminating special handling or storage considerations during transition. The identical package footprint (1411 / 3528 Metric) and physical dimensions ensure direct board-level compatibility without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the KEMET T494B335M035AT be used as a direct replacement for the TE Connectivity 4-1879063-4?

A: Yes. The KEMET T494B335M035AT meets all mandatory electrical and mechanical specifications of the TE Connectivity 4-1879063-4. Identical capacitance (3.3 µF), tolerance (±20%), ESR (1.3 Ohm), operating temperature range (-55°C ~ 125°C), and package dimensions (1411 / 3528 Metric) confirm direct substitution compatibility.

Q: What is the significance of the higher voltage rating on the substitute part?

A: The KEMET T494B335M035AT is rated for 35 V compared to the original 20 V rating. In applications operating at 20 V or below, the higher voltage rating provides additional safety margin and does not negatively impact circuit performance. The substitute part is suitable for any circuit designed for the original 20 V component.

Q: Are there any PCB layout or mounting considerations when switching to the KEMET substitute?

A: No. Both parts use identical 1411 (3528 Metric) surface mount packages with matching physical dimensions (0.138" L x 0.110" W / 3.50mm x 2.80mm) and maximum seated height (0.083" / 2.10mm). Direct PCB footprint compatibility is confirmed.

Q: What is the moisture sensitivity level for both parts?

A: Both the TE Connectivity 4-1879063-4 and KEMET T494B335M035AT are classified as MSL 1 (Unlimited). This classification indicates no moisture sensitivity restrictions and no special storage or handling requirements.

Q: Why is the KEMET T494B335M035AT recommended over the original TE Connectivity part?

A: The TE Connectivity 4-1879063-4 is classified as obsolete, creating supply chain risk. The KEMET T494B335M035AT is an active product with confirmed availability (20,214 pcs in stock) and includes ROHS3 compliance certification and specified lifetime performance data, supporting regulatory and reliability requirements.

Q: Are there any compliance or certification differences between the two parts?

A: The KEMET T494B335M035AT includes ROHS3 compliance certification and specified lifetime performance (2000 Hrs @ 125°C). Both parts are REACH Unaffected and carry EAR99 ECCN classification. The substitute part provides additional compliance documentation suitable for regulated applications.