F320G157MBA Equivalent & Substitute Parts

Part Overview

The Nichicon F320G157MBA is a 150 µF molded tantalum polymer capacitor rated at 4 V with an ESR of 45 mOhm @ 100 kHz, housed in a 1411 (3528 Metric) surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts maintain the same electrical specifications and mechanical form factor while offering active product status and improved availability.

Key Parameters

Parameter	Value
Capacitance	150 µF
Voltage Rating	4 V
Type	Molded Tantalum Polymer
ESR @ 100 kHz	45 mOhm
Package / Case	1411 (3528 Metric)
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 105°C
Tolerance	±20%
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the F320G157MBA is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

Capacitance: 150 µF
Voltage Rating: 4 V
Package / Case: 1411 (3528 Metric)
Mounting Type: Surface Mount
Operating Temperature Range: -55°C ~ 105°C
Tolerance: ±20%

Allowable Variation Parameters:

ESR @ 100 kHz: Substitute parts may have ESR values of 15 mOhm, 45 mOhm, or 70 mOhm. Lower ESR values provide improved performance characteristics and are acceptable substitutes.
Physical Height: Seated height may vary between 2.00 mm and 2.10 mm within the 1411 package specification.
Moisture Sensitivity Level: Substitute parts may have MSL ratings of 1 or 3, as both are suitable for the application.
Product Status: Active status substitutes are preferred over obsolete components.

Upgrade Parameter:

Voltage Rating: The T520B157M006ATE045 operates at 6.3 V, providing voltage margin improvement while maintaining all other critical parameters.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	ESR @ 100 kHz	Package	Height (Max)	Product Status	Availability
F320G157MBA	Nichicon	150 µF	4 V	45 mOhm	1411	2.10 mm	Obsolete	1015 Pcs
T520B157M004ATE015	KEMET	150 µF	4 V	15 mOhm	1411	2.00 mm	Active	8443 Pcs
T55B157M004C0045	Vishay Polytech	150 µF	4 V	45 mOhm	1411	2.10 mm	Active	740 Pcs
T55B157M004C0070	Vishay Sprague	150 µF	4 V	70 mOhm	1411	2.10 mm	Active	717 Pcs
TCJB157M004R0070	KYOCERA AVX	150 µF	4 V	70 mOhm	1210	2.10 mm	Active	649 Pcs
T520B157M006ATE045	KEMET	150 µF	6.3 V	45 mOhm	1411	2.00 mm	Active	8100 Pcs

Engineering Selection Recommendations

Direct Substitutes (4 V Rating):

T520B157M004ATE015 (KEMET) and T55B157M004C0045 (Vishay Polytech) are the primary direct substitutes. Both maintain the 4 V rating and 1411 package specification. T520B157M004ATE015 offers superior ESR performance at 15 mOhm and higher inventory availability. T55B157M004C0045 matches the original ESR specification at 45 mOhm. Both are ROHS3 compliant and active products.

T55B157M004C0070 (Vishay Sprague) and TCJB157M004R0070 (KYOCERA AVX) are acceptable substitutes with 70 mOhm ESR. TCJB157M004R0070 uses a 1210 package designation but maintains identical 3528 Metric dimensions. Both are ROHS3 compliant and active products.

Voltage Upgrade Option:

T520B157M006ATE045 (KEMET) provides a 6.3 V rating while maintaining 150 µF capacitance, 1411 package, and 45 mOhm ESR. This upgrade is suitable for applications where increased voltage margin is beneficial. ROHS3 compliant and active product status.

Compliance & Certifications:

All substitute parts are REACH Unaffected and classified as EAR99 for export control purposes. ROHS3 compliance is confirmed for all active substitutes. Moisture sensitivity levels range from MSL 1 to MSL 3, both acceptable for standard handling and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can T520B157M004ATE015 replace F320G157MBA directly?

A: Yes. T520B157M004ATE015 maintains identical capacitance (150 µF), voltage rating (4 V), package (1411), and operating temperature range (-55°C ~ 105°C). The lower ESR (15 mOhm vs. 45 mOhm) represents improved performance. KEMET's active product status and higher inventory availability make this the preferred substitute.

Q: What is the difference between 1411 and 1210 package designations?

A: Both designations refer to the same 3528 Metric physical dimensions (0.138" L x 0.110" W / 4.60 mm x 2.80 mm). The numeric codes reflect different manufacturer naming conventions. TCJB157M004R0070 is mechanically and electrically compatible despite the different package code.

Q: Is the 6.3 V rated T520B157M006ATE045 suitable for a 4 V application?

A: Yes. The 6.3 V rating provides voltage margin while maintaining all other specifications. This upgrade is suitable for applications where increased voltage headroom is desired or beneficial for circuit reliability.

Q: What does ESR variation mean for circuit performance?

A: ESR (Equivalent Series Resistance) affects ripple current handling and voltage ripple characteristics. Lower ESR values (15 mOhm) provide better high-frequency performance. Higher ESR values (70 mOhm) remain within acceptable limits for general-purpose applications. Selection depends on specific circuit requirements.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts are ROHS3 compliant. The original F320G157MBA (obsolete) does not specify RoHS status. All substitutes are REACH Unaffected.

Q: What is the significance of Moisture Sensitivity Level (MSL)?

A: MSL 1 (Unlimited) indicates no moisture sensitivity restrictions. MSL 3 (168 Hours) requires controlled storage and handling within 168 hours of package opening. Both levels are standard for tantalum polymer capacitors and do not affect substitution suitability for typical applications.

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