16TQC33MYFS Equivalent & Substitute Parts

Part Overview

The 16TQC33MYFS is a 33 µF molded tantalum polymer capacitor rated at 16 V, manufactured by Panasonic Electronic Components as part of the POSCAP™ TQC series. This component is designed for general-purpose applications requiring surface-mount tantalum polymer capacitors in the 2917 (7343 Metric) package. The part is currently in Last Time Buy status, making identification of equivalent and substitute parts essential for design continuity and procurement planning.

Key Parameters

Parameter	Value
Capacitance	33 µF
Voltage Rating	16 V
Package / Case	2917 (7343 Metric)
Type	Molded Tantalum Polymer
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 105°C
Lifetime @ Temperature	2000 Hrs @ 105°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the 16TQC33MYFS is determined by strict equivalence in the following parameters: capacitance (33 µF), voltage rating (16 V), package type (2917 / 7343 Metric), component type (molded tantalum polymer), and mounting method (surface mount). All identified substitutes maintain these core electrical and mechanical specifications. Variations in ESR (Equivalent Series Resistance), physical height, and packaging format (Tape & Reel vs. Cut Tape) are secondary considerations that do not prevent functional substitution when these primary parameters are matched.

Parameter Comparison

Parameter	16TQC33MYFS (Main)	16TQC33MYFD (Panasonic)	T521Q336M016ATE040 (KEMET)
Manufacturer	Panasonic Electronic Components	Panasonic Electronic Components	KEMET
Capacitance	33 µF	33 µF	33 µF
Voltage Rating	16 V	16 V	16 V
Tolerance	±20%	±20%	±20%
Package / Case	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)
Type	Molded Tantalum Polymer	Molded Tantalum Polymer	Molded Tantalum Polymer
ESR @ 100kHz	40 mOhm	70 mOhm	40 mOhm
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Lifetime @ 105°C	2000 Hrs	2000 Hrs	2000 Hrs
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Height - Seated (Max)	0.049" (1.25 mm)	0.079" (2.00 mm)	0.047" (1.20 mm)
Packaging Format	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)
Product Status	Last Time Buy	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

The 16TQC33MYFD (Panasonic) serves as the manufacturer-recommended substitute for the 16TQC33MYFS. Both parts are from the same manufacturer and series, with identical electrical specifications except for ESR. The 16TQC33MYFD is currently in Active product status, ensuring continued availability. The increased ESR of 70 mOhm versus 40 mOhm in the original part may impact performance in applications with strict ripple current or thermal dissipation requirements.

The T521Q336M016ATE040 (KEMET) provides a cross-manufacturer alternative with ESR matching the original 16TQC33MYFS at 40 mOhm. This part is also in Active status and offers equivalent electrical performance. The KEMET part includes Moisture Sensitivity Level (MSL) 3 classification, requiring controlled storage conditions (168 hours maximum at 60% relative humidity and 30°C).

Both substitute parts maintain full compliance with RoHS3 and REACH requirements. Selection between substitutes should consider ESR requirements, packaging format preferences, and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can the 16TQC33MYFD be used as a direct replacement for the 16TQC33MYFS?

A: Yes. Both parts share identical capacitance (33 µF), voltage rating (16 V), package type (2917 / 7343 Metric), operating temperature range (-55°C ~ 105°C), and lifetime specification (2000 Hrs @ 105°C). The primary difference is ESR: 16TQC33MYFD has 70 mOhm versus 40 mOhm in the original. This substitution is suitable for applications where the higher ESR does not violate thermal or ripple current constraints.

Q: What is the difference between the KEMET T521Q336M016ATE040 and the Panasonic 16TQC33MYFS?

A: Both parts have identical capacitance, voltage rating, package, and ESR (40 mOhm @ 100kHz). The KEMET part is from a different manufacturer and series (KO-CAP® T521 versus POSCAP™ TQC). The KEMET part specifies Moisture Sensitivity Level 3, requiring storage in controlled humidity conditions. Physical height differs slightly: KEMET at 0.047" (1.20 mm) versus Panasonic at 0.049" (1.25 mm).

Q: Are there packaging format differences between these substitutes?

A: Yes. The 16TQC33MYFS is supplied in Tape & Reel (TR) format. The 16TQC33MYFD is available in Cut Tape (CT) and Digi-Reel® formats. The T521Q336M016ATE040 is supplied in Tape & Reel (TR) format. Packaging format selection depends on assembly equipment and procurement volume requirements.

Q: Why is the 16TQC33MYFS marked as Last Time Buy?

A: Last Time Buy status indicates that Panasonic has discontinued this specific part number. Customers must transition to alternative part numbers for future designs and procurement. The 16TQC33MYFD and T521Q336M016ATE040 are both in Active status and represent viable long-term alternatives.

Q: Do all three parts meet the same compliance standards?

A: Yes. All three parts are ROHS3 Compliant and REACH Unaffected. The KEMET part includes additional Moisture Sensitivity Level 3 classification, which requires specific handling and storage protocols during manufacturing and assembly.

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