T520D157M008ASE040 Equivalent & Substitute Parts

Part Overview

The T520D157M008ASE040 is a 150 µF molded tantalum polymer capacitor rated at 8 V with 40 mOhm equivalent series resistance at 100 kHz, manufactured by KEMET in the KO-CAP® T520 series. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. The part is housed in a 2917 (7343 Metric) surface mount package with general purpose application characteristics.

Substiute Parts

T520D157M008ASE040

KEMETIn Stock: 1175T520D157M008ASE040 Datasheet

Current PartRFQ

T520D157M008ATE040

KEMETIn Stock: 1053T520D157M008ATE040 Datasheet

DirectRFQ

T520V157M008ATE040

KEMETIn Stock: 1624T520V157M008ATE040 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the T520D157M008ASE040 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 150 µF
• Voltage Rating: 8 V
• ESR: 40 mOhm @ 100 kHz
• Package / Case: 2917 (7343 Metric)
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C to 105°C
• Type: Molded tantalum polymer

Allowable Variations:

• Packaging format (bulk versus Tape & Reel)
• Product status (obsolete to active)
• RoHS compliance level
• Physical height (seated maximum) within the same package envelope
• Manufacturer size code designation

The substitute parts T520D157M008ATE040 and T520V157M008ATE040 maintain electrical equivalence while offering active product status and improved compliance certifications. The T520V157M008ATE040 variant incorporates a reduced height profile (0.075" versus 0.122" maximum seated height) while preserving all electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

T520D157M008ATE040 is the direct functional equivalent of the obsolete T520D157M008ASE040. This substitute maintains identical electrical specifications and physical dimensions while offering active product status and ROHS3 compliance. The transition from bulk to Tape & Reel packaging provides improved handling and automated assembly compatibility. This part is recommended for applications requiring direct replacement with enhanced regulatory compliance.

T520V157M008ATE040 provides electrical equivalence with a reduced height profile (0.075" seated maximum versus 0.122"). The manufacturer size code V designation reflects this dimensional optimization while preserving all electrical performance parameters. This variant is suitable for space-constrained applications where the lower profile accommodates tighter PCB assembly requirements. ROHS3 compliance and active product status apply to this variant as well.

Both substitute parts are manufactured by KEMET within the KO-CAP® T520 series and carry REACH Unaffected status. Selection between T520D157M008ATE040 and T520V157M008ATE040 depends on available PCB clearance and assembly height constraints.

Frequently Asked Questions (FAQ)

Q: Can T520D157M008ATE040 directly replace T520D157M008ASE040 in existing designs?

A: Yes. The T520D157M008ATE040 maintains identical electrical specifications (150 µF, 8 V, 40 mOhm ESR), operating temperature range, and physical footprint. The primary difference is packaging format (Tape & Reel versus bulk) and product status (active versus obsolete). RoHS3 compliance is an additional benefit.

Q: What is the difference between T520D157M008ATE040 and T520V157M008ATE040?

A: Both parts are electrically identical with 150 µF capacitance, 8 V rating, and 40 mOhm ESR. The distinction is physical height: T520D has a maximum seated height of 0.122" (3.10mm), while T520V has a maximum seated height of 0.075" (1.90mm). The T520V variant is suitable for applications with restricted vertical clearance on the PCB.

Q: Are the substitute parts compatible with the original PCB footprint?

A: Yes. Both T520D157M008ATE040 and T520V157M008ATE040 use the 2917 (7343 Metric) package with identical length and width dimensions (0.287" L x 0.169" W). The T520V variant has a lower profile but remains within the same package envelope and footprint.

Q: What is the significance of the packaging format change from bulk to Tape & Reel?

A: Tape & Reel (TR) packaging is standard for automated surface mount assembly processes. This format improves handling efficiency, reduces component damage during manufacturing, and enables direct integration with pick-and-place equipment. Bulk packaging is typically used for manual assembly or lower-volume applications.

Q: Do the substitute parts meet current regulatory requirements?

A: Yes. Both T520D157M008ATE040 and T520V157M008ATE040 are ROHS3 compliant and REACH Unaffected. The original T520D157M008ASE040 is RoHS non-compliant, making the substitutes necessary for applications subject to RoHS directives.

Q: What is Moisture Sensitivity Level 3, and how does it affect handling?

A: MSL 3 indicates the component requires controlled storage and handling conditions with a maximum floor life of 168 hours at 30°C and 60% relative humidity after the package is opened. Components must be stored in dry conditions and baked according to IPC standards before reflow soldering if floor life is exceeded.

Q: Are there any electrical performance differences between the substitute parts and the original?

A: No. All three parts (T520D157M008ASE040, T520D157M008ATE040, and T520V157M008ATE040) maintain identical electrical specifications: 150 µF capacitance, 8 V voltage rating, 40 mOhm ESR at 100 kHz, -55°C to 105°C operating range, and 2000 hours lifetime at 105°C.