ATPH33MAHA Equivalent & Substitute Parts

Part Overview

The ATPH33MAHA is a 33 µF molded tantalum polymer capacitor rated at 10 V in 1206 (3216 Metric) surface mount package, manufactured by Panasonic Electronic Components as part of the POSCAP™ TPH series. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning. The part delivers 150 mOhm equivalent series resistance at 100 kHz and operates across a temperature range of -55°C to 85°C with a 1000-hour lifetime rating at 85°C.

Key Parameters

Parameter	Value
Capacitance	33 µF
Voltage Rating	10 V
Type	Molded Tantalum Polymer
ESR @ 100 kHz	150 mOhm
Package	1206 (3216 Metric)
Operating Temperature Range	-55°C to 85°C
Lifetime @ 85°C	1000 Hours
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the ATPH33MAHA is determined by the following critical parameters:

Capacitance Value: Must be 33 µF (±20% tolerance acceptable)
Voltage Rating: Must be 10 V or higher
Type: Molded tantalum polymer construction
Mounting: Surface mount technology
RoHS Compliance: ROHS3 compliant status required

The F381A336MSALZT from KYOCERA AVX qualifies as a functional equivalent based on matching capacitance (33 µF), voltage rating (10 V), type (molded tantalum polymer), and RoHS compliance. However, this substitute employs a smaller 0805 (2012 Metric) package with different physical dimensions and a higher ESR specification (200 mOhm @ 100 kHz). Package size differences necessitate PCB layout modification, and the elevated ESR may impact performance in applications sensitive to impedance characteristics.

Parameter Comparison

Parameter	ATPH33MAHA (Panasonic)	F381A336MSALZT (KYOCERA AVX)
Capacitance	33 µF	33 µF
Voltage Rating	10 V	10 V
Type	Molded Tantalum Polymer	Molded Tantalum Polymer
ESR @ 100 kHz	150 mOhm	200 mOhm
Package	1206 (3216 Metric)	0805 (2012 Metric)
Size (L x W)	0.126" x 0.063" (3.20mm x 1.60mm)	0.079" x 0.049" (2.00mm x 1.25mm)
Height (Max)	0.039" (1.00mm)	0.035" (0.90mm)
Operating Temperature	-55°C to 85°C	-55°C to 105°C
Lifetime @ 85°C	1000 Hours	1000 Hours
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)
Product Status	Obsolete	Not For New Designs

Engineering Selection Recommendations

The F381A336MSALZT presents a viable functional substitute for the ATPH33MAHA based on electrical parameter alignment and regulatory compliance. Both components maintain ROHS3 compliance and identical MSL ratings, supporting equivalent handling and storage requirements.

The primary consideration for substitution is package geometry. The F381A336MSALZT occupies a smaller footprint (0805 versus 1206), requiring PCB layout modification. The substitute's higher ESR specification (200 mOhm versus 150 mOhm) may introduce measurable impedance differences in applications with stringent ripple current or transient response requirements.

The F381A336MSALZT's extended operating temperature range (-55°C to 105°C) provides broader thermal coverage compared to the original part (-55°C to 85°C), presenting a potential advantage in temperature-sensitive applications.

Both components carry non-active product status designations, indicating limited long-term availability. Procurement planning should account for inventory constraints and potential future discontinuation.

Frequently Asked Questions (FAQ)

Q: Can the F381A336MSALZT directly replace the ATPH33MAHA without PCB modification?

A: No. The F381A336MSALZT uses a 0805 (2012 Metric) package versus the ATPH33MAHA's 1206 (3216 Metric) package. PCB footprint redesign is required. Physical dimensions differ: the substitute measures 0.079" x 0.049" compared to 0.126" x 0.063" for the original part.

Q: What is the impact of the 50 mOhm ESR difference between these parts?

A: The F381A336MSALZT exhibits 200 mOhm ESR at 100 kHz versus 150 mOhm for the ATPH33MAHA. This 33% increase in equivalent series resistance may affect applications sensitive to impedance characteristics, including high-frequency filtering, power delivery networks, or circuits requiring low ripple current performance.

Q: Are both parts suitable for new designs?

A: Neither component is recommended for new designs. The ATPH33MAHA is classified as obsolete, and the F381A336MSALZT carries a "Not For New Designs" status. Both designations indicate limited manufacturer support and potential future discontinuation.

Q: Do both parts meet the same compliance and handling requirements?

A: Yes. Both components are ROHS3 compliant and carry identical MSL 3 ratings (168 hours), supporting equivalent handling, storage, and reflow processing procedures.

Q: What is the temperature operating range difference?

A: The ATPH33MAHA operates from -55°C to 85°C, while the F381A336MSALZT extends to -55°C to 105°C. The substitute provides 20°C additional upper temperature capability, which may benefit applications in elevated thermal environments.

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