T491C336M006AT Equivalent & Substitute Parts

Part Overview

The T491C336M006AT is an active molded tantalum capacitor manufactured by KEMET, rated at 33 µF capacitance with a 6.3 V voltage rating and ±20% tolerance. This component is designed for surface mount applications in the 2312 (6032 Metric) package format with an operating temperature range of -55°C to 125°C. The part is ROHS3 compliant and carries unlimited moisture sensitivity level (MSL 1) classification.

Equivalent and substitute parts are identified when they maintain the same capacitance value, package format, and mounting type while offering improved electrical characteristics or expanded operating conditions. Substitute parts may feature higher voltage ratings, tighter tolerances, or extended temperature ranges that provide enhanced performance margins in circuit applications.

Substiute Parts

T491C336M006AT

KEMETIn Stock: 923T491C336M006AT Datasheet

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T499C336K010ATE1K8

KEMETIn Stock: 1334T499C336K010ATE1K8 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the T491C336M006AT is determined by the following criteria:

Mandatory Matching Parameters:

• Capacitance: 33 µF (exact match required)
• Package / Case: 2312 (6032 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Physical Dimensions: 0.236" L x 0.126" W, Height 0.110" max (exact match required)
• ESR: 1.8 Ohm (exact match required)

Allowable Variation Parameters:

• Voltage Rating: May be equal to or higher than 6.3 V
• Tolerance: May be equal to or tighter than ±20%
• Operating Temperature Range: May be equal to or extended beyond -55°C ~ 125°C
• Lifetime @ Temperature: May be equal to or exceed 2000 Hrs @ 125°C

The T499C336K010ATE1K8 qualifies as a substitute part because it maintains all mandatory matching parameters while providing improved electrical characteristics through higher voltage rating (10 V), tighter tolerance (±10%), and extended operating temperature range (-55°C ~ 175°C).

Parameter Comparison

Engineering Selection Recommendations

Both the T491C336M006AT and T499C336K010ATE1K8 are active products manufactured by KEMET with full ROHS3 compliance and REACH unaffected status. Both components carry unlimited moisture sensitivity level (MSL 1) classification, indicating no special handling requirements during storage or assembly.

The T499C336K010ATE1K8 substitute part provides enhanced performance margins through a higher voltage rating (10 V versus 6.3 V) and tighter capacitance tolerance (±10% versus ±20%). The extended operating temperature range (-55°C ~ 175°C) and automotive-grade AEC-Q200 rating of the substitute part support applications requiring higher reliability standards or operation in elevated temperature environments.

Selection between these parts depends on circuit voltage requirements and tolerance specifications. The main part T491C336M006AT is suitable for applications with 6.3 V maximum operating voltage and ±20% tolerance acceptance. The substitute T499C336K010ATE1K8 is appropriate for circuits requiring higher voltage headroom, tighter tolerance control, or extended temperature operation.

Frequently Asked Questions (FAQ)

Q: Can the T499C336K010ATE1K8 be used as a direct replacement for the T491C336M006AT?

A: Yes. Both parts share identical capacitance (33 µF), package format (2312 / 6032 Metric), physical dimensions, ESR (1.8 Ohm), and mounting type (Surface Mount). The substitute part maintains all mandatory electrical and mechanical parameters required for direct substitution.

Q: What are the key differences between these two parts?

A: The T499C336K010ATE1K8 provides three improvements: higher voltage rating (10 V versus 6.3 V), tighter capacitance tolerance (±10% versus ±20%), and extended operating temperature range (-55°C ~ 175°C versus -55°C ~ 125°C). The substitute part also carries AEC-Q200 automotive qualification.

Q: Are there any package or footprint differences?

A: No. Both parts use the identical 2312 (6032 Metric) package with matching physical dimensions of 0.236" L x 0.126" W and maximum seated height of 0.110" (2.80mm). PCB footprints and assembly processes are identical.

Q: Does the higher voltage rating of the substitute part affect circuit performance?

A: No. A higher voltage rating does not degrade performance in circuits designed for lower voltages. The 10 V rating of the substitute part provides additional safety margin and stress relief in the 6.3 V application, potentially extending component lifetime.

Q: Are both parts RoHS compliant?

A: Yes. Both the T491C336M006AT and T499C336K010ATE1K8 are ROHS3 compliant with REACH unaffected status. Both carry unlimited moisture sensitivity level (MSL 1) classification.

Q: What is the significance of the ±10% tolerance on the substitute part?

A: The ±10% tolerance on the T499C336K010ATE1K8 provides tighter capacitance control compared to the ±20% tolerance of the main part. This tighter tolerance reduces capacitance variation across production batches and may improve circuit performance in applications sensitive to capacitance drift.