KEMET T520B336M010ASE040 Equivalent & Substitute Parts

Part Overview

The KEMET T520B336M010ASE040 is a 33 µF molded tantalum polymer capacitor rated at 10 V with an ESR of 40 mOhm @ 100 kHz, housed in a 1411 (3528 Metric) surface mount package. This component is classified as obsolete product status. Due to its obsolete designation, equivalent and substitute parts from active product lines are necessary for new designs and ongoing production requirements. Substitute parts maintain the core electrical specifications while offering improved availability and compliance status.

Key Parameters

Parameter	Value
Capacitance	33 µF
Voltage - Rated	10 V
ESR (Equivalent Series Resistance)	40 mOhm @ 100 kHz
Type	Molded Tantalum Polymer
Package / Case	1411 (3528 Metric)
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 105°C
Tolerance	±20%
Lifetime @ Temp.	2000 Hrs @ 105°C
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

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

Capacitance: 33 µF (exact match required)
Voltage Rating: 10 V (exact match required)
Package / Case: 1411 (3528 Metric) (exact match required)
Mounting Type: Surface Mount (exact match required)
Operating Temperature Range: -55°C ~ 105°C (exact match required)
Type: Molded Tantalum Polymer (exact match required)
Tolerance: ±20% (exact match required)

Substitute parts are categorized as follows:

Direct Manufacturer Substitutes (KEMET KO-CAP® T520 Series): Parts T520B336M010ATE040 and T520B336M010ATE0408000 are direct substitutes with identical electrical and mechanical specifications. These parts are active products with improved RoHS3 compliance status.

Parametric Equivalent (KEMET KO-CAP® T520 Series): Part T520T336M010ATE040 maintains all critical electrical parameters but features a reduced seated height of 0.047" (1.20 mm) compared to the main part's 0.079" (2.00 mm). This dimensional difference may affect board layout compatibility.

Parametric Equivalent (KEMET KO-CAP® T520 Series): Part T520B336M010AHE040 is electrically and mechanically identical to the main part but carries non-compliant RoHS status, matching the original part's compliance profile.

Cross-Manufacturer Parametric Equivalent (Vishay Sprague vPolyTan™ T55 Series): Part T55B336M010C0070 maintains capacitance, voltage, package, and mounting specifications but features an ESR of 70 mOhm @ 100 kHz (versus 40 mOhm for the main part) and a seated height of 0.083" (2.10 mm).

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	ESR @ 100kHz	Package	Height (Max)	Product Status	RoHS Status
T520B336M010ASE040	KEMET	KO-CAP® T520	33 µF	10 V	40 mOhm	1411 (3528)	0.079" (2.00 mm)	Obsolete	Non-compliant
T520B336M010ATE040	KEMET	KO-CAP® T520	33 µF	10 V	40 mOhm	1411 (3528)	0.079" (2.00 mm)	Active	ROHS3 Compliant
T520T336M010ATE040	KEMET	KO-CAP® T520	33 µF	10 V	40 mOhm	1411 (3528)	0.047" (1.20 mm)	Active	ROHS3 Compliant
T520B336M010ATE0408000	KEMET	KO-CAP® T520	33 µF	10 V	40 mOhm	1411 (3528)	0.079" (2.00 mm)	Active	ROHS3 Compliant
T520B336M010AHE040	KEMET	KO-CAP® T520	33 µF	10 V	40 mOhm	1411 (3528)	0.079" (2.00 mm)	Active	Non-compliant
T55B336M010C0070	Vishay Sprague	vPolyTan™ T55	33 µF	10 V	70 mOhm	1411 (3528)	0.083" (2.10 mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

For RoHS3 Compliant Applications with Identical Specifications: Select T520B336M010ATE040 or T520B336M010ATE0408000. Both parts are active KEMET products with full RoHS3 compliance, identical electrical performance (40 mOhm ESR), and matching mechanical dimensions to the original part. T520B336M010ATE040 offers higher inventory availability (23,784 pcs).

For Space-Constrained Designs Requiring Reduced Height: Select T520T336M010ATE040. This KEMET part maintains all electrical specifications and RoHS3 compliance but provides a 0.032" (0.80 mm) reduction in seated height, enabling tighter board layouts where vertical clearance is limited.

For Non-Compliant RoHS Applications Matching Original Specifications: Select T520B336M010AHE040. This part provides electrical and mechanical equivalence to the original obsolete part while maintaining active product status. RoHS non-compliance matches the original part's regulatory profile.

For Cross-Manufacturer Substitution with Higher ESR Tolerance: Select T55B336M010C0070 (Vishay Sprague). This part maintains all critical package and electrical specifications but operates with 70 mOhm ESR (versus 40 mOhm). This higher ESR may affect circuit performance in applications sensitive to impedance characteristics. RoHS3 compliance is provided.

Frequently Asked Questions (FAQ)

Q: Can T520T336M010ATE040 be used as a direct replacement for T520B336M010ASE040 in existing PCB designs?

A: T520T336M010ATE040 is electrically equivalent but features a reduced seated height of 0.047" (1.20 mm) versus the original 0.079" (2.00 mm). PCB layout compatibility depends on whether the design accommodates this dimensional difference. If the PCB footprint and clearance specifications allow for the lower profile, substitution is feasible. If the original design requires the full 0.079" height for mechanical or thermal considerations, this part is not suitable.

Q: What is the difference between T520B336M010ATE040 and T520B336M010ATE0408000?

A: Both parts are electrically and mechanically identical with 33 µF capacitance, 10 V rating, 40 mOhm ESR, and 1411 package. The primary difference is packaging designation and inventory availability. T520B336M010ATE040 is available in higher quantity (23,784 pcs) and is the preferred selection for standard applications.

Q: Why does T55B336M010C0070 have higher ESR than the original part?

A: T55B336M010C0070 is a Vishay Sprague product from the vPolyTan™ T55 series with different internal construction characteristics. The 70 mOhm ESR (versus 40 mOhm for KEMET parts) reflects design differences between manufacturers. This higher ESR may impact ripple current handling and thermal performance in high-frequency switching applications.

Q: Are all substitute parts RoHS3 compliant?

A: No. T520B336M010AHE040 maintains RoHS non-compliant status matching the original part. All other substitutes (T520B336M010ATE040, T520T336M010ATE040, T520B336M010ATE0408000, and T55B336M010C0070) are RoHS3 compliant. Compliance requirements should be verified against application and regional regulations.

Q: Can the Vishay Sprague T55B336M010C0070 be used in applications requiring 40 mOhm ESR specification?

A: No. The T55B336M010C0070 operates at 70 mOhm ESR, which exceeds the 40 mOhm specification of the original part. Use of this part in circuits with strict ESR requirements may result in performance degradation, increased heat generation, or circuit instability. This part is suitable only for applications where ESR tolerance permits the higher value.

Q: What is the inventory status for each substitute part?

A: T520B336M010ATE040 has the highest availability (23,784 pcs). T520T336M010ATE040 has 8,294 pcs available. T520B336M010ATE0408000 has 972 pcs available. T520B336M010AHE040 has 618 pcs available. T55B336M010C0070 has 5,300 pcs available. Inventory levels should be confirmed at time of procurement.

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