T591B336M006ATE080 Equivalent & Substitute Parts

Part Overview

The T591B336M006ATE080 is a 33 µF molded tantalum polymer capacitor rated at 6.3 V, manufactured by KEMET in the KO-CAP® T591 series. This surface mount component is housed in a 1411 (3528 Metric) package and features an ESR of 80 mOhm @ 100 kHz. The part is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to inventory constraints, design revisions, or supply chain considerations.

Substiute Parts

T591B336M006ATE080

KEMETIn Stock: 44497T591B336M006ATE080 Datasheet

Current PartRFQ

T525B336M006ATE080

KEMETIn Stock: 2956T525B336M006ATE080 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the T591B336M006ATE080 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Capacitance: 33 µF (exact match)
• Voltage Rating: 6.3 V (exact match)
• Tolerance: ±20% (exact match)
• ESR: 80 mOhm @ 100 kHz (exact match)

Mechanical Equivalence Requirements:

• Package / Case: 1411 (3528 Metric) (exact match)
• Mounting Type: Surface Mount (exact match)
• Type: Molded Tantalum Polymer (exact match)

Compliance & Environmental Requirements:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 3 (168 Hours)
• Operating Temperature Range: -55°C ~ 125°C

The T525B336M006ATE080 meets all electrical and mechanical equivalence criteria. Both parts are manufactured by KEMET, operate within the same temperature range, and share identical capacitance, voltage, tolerance, ESR, and package specifications. The primary difference is the lifetime rating at elevated temperature (2000 Hrs @ 105°C for T591B versus 2000 Hrs @ 125°C for T525B) and a minor height variation (0.083" maximum for T591B versus 0.079" maximum for T525B).

Parameter Comparison

Engineering Selection Recommendations

Both the T591B336M006ATE080 and T525B336M006ATE080 are Active product status components manufactured by KEMET and are ROHS3 compliant. Selection between these parts is based on the following engineering criteria:

T591B336M006ATE080 (Primary Selection):

• Use when the original design specification calls for the T591 series
• Suitable for applications with thermal profiles up to 105°C continuous operation
• Maximum seated height of 0.083" (2.10mm)

T525B336M006ATE080 (Substitute Selection):

• Use as a direct functional equivalent when T591B inventory is unavailable
• Suitable for applications with thermal profiles up to 125°C continuous operation, providing enhanced thermal margin
• Reduced maximum seated height of 0.079" (2.00mm) accommodates space-constrained layouts
• Both parts maintain identical electrical performance (33 µF, 6.3 V, 80 mOhm ESR)

Both parts satisfy identical compliance requirements (ROHS3, MSL 3) and operate across the full -55°C to 125°C temperature range. The T525B series offers superior lifetime rating at elevated temperature (2000 Hrs @ 125°C versus 2000 Hrs @ 105°C), making it suitable for high-reliability applications.

Frequently Asked Questions (FAQ)

Q: Can the T525B336M006ATE080 be used as a direct replacement for the T591B336M006ATE080?

A: Yes. Both parts share identical electrical specifications (33 µF, 6.3 V, ±20% tolerance, 80 mOhm ESR @ 100 kHz) and mechanical compatibility (1411 package, surface mount, identical footprint dimensions). The T525B is a functional equivalent.

Q: What is the difference in height between these two parts?

A: The T591B336M006ATE080 has a maximum seated height of 0.083" (2.10mm), while the T525B336M006ATE080 has a maximum seated height of 0.079" (2.00mm). This 0.004" (0.10mm) difference is negligible for most applications but may be relevant in space-constrained designs.

Q: Are there differences in thermal performance between these parts?

A: Both parts operate across -55°C to 125°C. The T591B is rated for 2000 Hrs @ 105°C, while the T525B is rated for 2000 Hrs @ 125°C. The T525B provides extended lifetime rating at higher temperatures.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the T591B336M006ATE080 and T525B336M006ATE080 are ROHS3 compliant, REACH unaffected, and carry MSL 3 (168 Hours) moisture sensitivity classification.

Q: Can these parts be used interchangeably on the same PCB assembly?

A: Yes. Both parts use identical 1411 (3528 Metric) packages with matching footprint dimensions (0.138" L x 0.110" W / 3.50mm x 2.80mm) and surface mount mounting type. PCB layout and assembly processes require no modification.

Q: What is the ESR specification, and is it identical between both parts?

A: ESR (Equivalent Series Resistance) is 80 mOhm @ 100 kHz for both parts. This specification is critical for filtering and ripple current applications and is identical across both alternatives.