TAS226K035P1F Equivalent & Substitute Parts

Part Overview

The TAS226K035P1F is a 22 µF hermetically sealed tantalum capacitor rated at 35 V, manufactured by Cornell Dubilier Electronics (CDE) in axial through-hole configuration. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The part operates across a temperature range of -55°C to 125°C and is suitable for general-purpose applications requiring reliable capacitive energy storage in compact axial packages.

Key Parameters

Parameter	Value	Significance for Substitution
Capacitance	22 µF	Must match exactly
Voltage Rating	35 V	Substitutes may exceed this rating; equal or higher acceptable
Tolerance	±10%	Must match or be tighter
Type	Hermetically Sealed Tantalum	Must match
Mounting Type	Through Hole Axial	Must match for PCB compatibility
Operating Temperature	-55°C to 125°C	Substitutes must support minimum range
Package / Case	Axial	Must match

Substitute Part Grouping Explanation

Substitution for the TAS226K035P1F is determined by strict adherence to the following electrical and mechanical parameters:

Primary Matching Criteria:

Capacitance value: 22 µF (exact match required)
Tolerance: ±10% (exact match required)
Type: Hermetically sealed tantalum (exact match required)
Mounting: Through-hole axial configuration (exact match required)
Operating temperature range: Must support -55°C to 125°C minimum

Voltage Rating Logic: Substitutes with voltage ratings equal to or greater than 35 V are acceptable. Higher voltage ratings provide design margin and improved reliability in applications where the original 35 V specification is met.

Identified Substitute Categories:

Direct Equivalent (35 V Rating): M39003/01-6111 maintains the original voltage specification with military-grade reliability classification.
Upgraded Substitutes (75 V Rating): 109D226X9075C2 and 135D226X9075C2 and 135D226X9075C6 provide enhanced voltage margin with extended temperature capability in select models.
Premium Upgraded Substitutes (100 V Rating): 135D226X9100F2 and 135D226X9100F6 offer maximum voltage headroom and extended operating temperature range.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage Rating	Tolerance	ESR (Ω)	Operating Temp (°C)	Size (mm)	Product Status
TAS226K035P1F	Cornell Dubilier Electronics	22 µF	35 V	±10%	—	-55 to 125	7.34 × 17.42	Obsolete
M39003/01-6111	KEMET	22 µF	35 V	±10%	1.3	-55 to 125	7.34 × 20.88	Active
109D226X9075C2	Vishay Sprague	22 µF	75 V	±10%	5.0	-55 to 125	5.56 × 15.45	Active
135D226X9075C2	Vishay Sprague	22 µF	75 V	±10%	5.1	-55 to 200	5.16 × 11.51	Active
135D226X9075C6	Vishay Sprague	22 µF	75 V	±10%	5.1	-55 to 200	5.16 × 11.51	Active
135D226X9100F2	Vishay Sprague	22 µF	100 V	±10%	4.8	-55 to 125	7.52 × 16.28	Active
135D226X9100F6	Vishay Sprague	22 µF	100 V	±10%	4.8	-55 to 200	7.52 × 16.28	Active

Engineering Selection Recommendations

For Direct Replacement (Equivalent Voltage Rating):

M39003/01-6111 serves as the primary direct equivalent, maintaining the 35 V voltage specification of the original TAS226K035P1F. This KEMET part is manufactured to MIL-PRF-39003/1 military specification with active product status, ensuring long-term availability and supply chain stability. The 1.3 Ω ESR specification provides documented performance characteristics. Physical dimensions are slightly longer (20.88 mm vs. 17.42 mm), requiring verification of available PCB space.

For Upgraded Voltage Performance (75 V Rating):

The Vishay Sprague 135D series parts (135D226X9075C2 and 135D226X9075C6) offer 75 V voltage rating with extended operating temperature to 200°C. These components provide enhanced design margin for applications subject to voltage transients or thermal stress. The 135D226X9075C6 variant is preferred for designs requiring the full -55°C to 200°C temperature range. Physical dimensions are significantly reduced (5.16 mm diameter × 11.51 mm length), enabling space optimization in compact layouts.

For Maximum Voltage Headroom (100 V Rating):

The 135D226X9100F6 represents the premium upgrade option with 100 V rating, 4.8 Ω ESR, and -55°C to 200°C operating range. This part accommodates the most demanding thermal and electrical stress conditions. Physical dimensions match the original part more closely (7.52 mm diameter × 16.28 mm length), simplifying PCB layout migration. Inventory availability is substantial (300,400 units), supporting high-volume production requirements.

Compliance Considerations:

All substitute parts maintain RoHS non-compliant status consistent with the original TAS226K035P1F. REACH status varies: KEMET M39003/01-6111 is REACH Affected; Vishay Sprague parts are REACH Unaffected. Applications subject to REACH compliance requirements must select accordingly.

Frequently Asked Questions (FAQ)

Q: Can I use a 75 V or 100 V rated capacitor in place of the 35 V TAS226K035P1F?

A: Yes. Higher voltage ratings are acceptable substitutes provided all other parameters match: 22 µF capacitance, ±10% tolerance, hermetically sealed tantalum type, through-hole axial mounting, and operating temperature support for -55°C to 125°C minimum. Higher voltage ratings provide additional design margin without affecting circuit functionality.

Q: What is the significance of ESR (Equivalent Series Resistance) differences between parts?

A: ESR affects ripple current handling, thermal performance, and high-frequency response. The original TAS226K035P1F does not specify ESR. Substitute parts range from 1.3 Ω (M39003/01-6111) to 5.1 Ω (135D series). Lower ESR values reduce heat generation and improve transient response. Circuit analysis is required to determine if ESR differences impact performance in specific applications.

Q: Are there physical size constraints I should consider?

A: Yes. The original TAS226K035P1F measures 7.34 mm diameter × 17.42 mm length. Substitute parts vary significantly: 109D226X9075C2 is smaller (5.56 mm × 15.45 mm); 135D series at 75 V is smallest (5.16 mm × 11.51 mm); 135D series at 100 V matches original dimensions more closely (7.52 mm × 16.28 mm). Verify PCB layout compatibility before selection, particularly for space-constrained designs.

Q: What is the difference between 135D226X9075C2 and 135D226X9075C6?

A: Both parts are electrically identical: 22 µF, 75 V, ±10% tolerance, 5.1 Ω ESR, identical physical dimensions. The suffix designates different packaging or manufacturing batches. Selection between these variants depends on supplier availability and internal procurement specifications.

Q: Why does M39003/01-6111 have a longer axial length than the original part?

A: The KEMET M39003/01-6111 is manufactured to military specification MIL-PRF-39003/1, which incorporates additional internal construction for reliability and failure rate classification (B grade, 0.1%). This results in a longer case length (20.88 mm vs. 17.42 mm). PCB layout must accommodate this dimension before selection.

Q: Which substitute part offers the best long-term availability?

A: The 135D226X9100F6 demonstrates the strongest supply position with 300,400 units in stock and active product status. This Vishay Sprague part is manufactured in high volume and represents the most reliable choice for applications requiring extended production runs or future design revisions.

Q: Can I mix different substitute parts in the same circuit board?

A: All identified substitutes are electrically compatible for the same circuit function due to matching capacitance, tolerance, and voltage specifications. However, mixing different manufacturers or voltage ratings in the same design introduces component variation and complicates procurement and quality control. Standardize on a single substitute part number for production consistency.

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