Equivalent & Substitute Parts for 1879057-1

Part Overview

The TE Connectivity 1879057-1 is a 100 µF molded tantalum capacitor rated at 16 V in a 2917 (7343 Metric) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. The part operates across a temperature range of -55°C to 125°C and features a 900 mOhm equivalent series resistance (ESR) with ±10% capacitance tolerance.

Key Parameters

Parameter	Value
Capacitance	100 µF
Voltage Rating	16 V
Tolerance	±10%
Package / Case	2917 (7343 Metric)
Mounting Type	Surface Mount
Type	Molded Tantalum
Operating Temperature Range	-55°C to 125°C
ESR (Equivalent Series Resistance)	900 mOhm
Moisture Sensitivity Level	MSL 1 (Unlimited)
RoHS Status	Not specified for main part

Substitute Part Grouping Explanation

Substitution of the 1879057-1 is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Substitution Criteria:

Capacitance: 100 µF (exact match required)
Voltage Rating: 16 V (exact match required)
Tolerance: ±10% (exact match required)
Package / Case: 2917 (7343 Metric) (exact match required)
Mounting Type: Surface Mount (exact match required)
Operating Temperature Range: -55°C to 125°C (exact match required)
Moisture Sensitivity Level: MSL 1 (Unlimited) (exact match required)

Secondary Consideration:

ESR (Equivalent Series Resistance): The main part specifies 900 mOhm. Substitute parts with lower ESR values (600 mOhm, 150 mOhm, 125 mOhm, 100 mOhm, or 75 mOhm) are electrically compatible and represent performance improvements. Substitute parts with higher ESR are not acceptable.

Type Variations:

Molded tantalum capacitors are directly substitutable with other molded tantalum capacitors meeting all primary criteria.
Conformal coated tantalum capacitors meet all primary electrical criteria but feature different physical dimensions and MSL ratings (MSL 2A), making them similar but not direct equivalents.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Package	Type	ESR (mOhm)	Height Max	Operating Temp	MSL	Product Status	RoHS Status
1879057-1	TE Connectivity	100 µF	16 V	±10%	2917	Molded	900	0.118" (3.00mm)	-55°C to 125°C	1	Obsolete	Not specified
TAJY107K016A	KYOCERA AVX	100 µF	16 V	±10%	2917	Molded	900	0.079" (2.00mm)	-55°C to 125°C	1	Active	ROHS3 Compliant
TAJY107K016RNJ	KYOCERA AVX	100 µF	16 V	±10%	2917	Molded	900	0.079" (2.00mm)	-55°C to 125°C	1	Active	ROHS3 Compliant
TAJY107K016Y	KYOCERA AVX	100 µF	16 V	±10%	2917	Molded	900	0.079" (2.00mm)	-55°C to 125°C	1	Active	ROHS3 Compliant
293D107X9016D2TE3	Vishay Sprague	100 µF	16 V	±10%	2917	Molded	600	0.122" (3.10mm)	-55°C to 125°C	1	Active	ROHS3 Compliant
293D107X9016E2TE3	Vishay Sprague	100 µF	16 V	±10%	2917	Molded	600	0.170" (4.32mm)	-55°C to 125°C	1	Active	ROHS3 Compliant
591D107X9016D2T20H	Vishay Sprague	100 µF	16 V	±10%	2917	Conformal Coated	75	0.079" (2.00mm)	-55°C to 125°C	2A	Active	ROHS3 Compliant
592D107X9016D2T15H	Vishay Sprague	100 µF	16 V	±10%	2917	Conformal Coated	150	0.059" (1.50mm)	-55°C to 125°C	2A	Active	ROHS3 Compliant
592D107X9016D2T20H	Vishay Sprague	100 µF	16 V	±10%	2917	Conformal Coated	150	0.079" (2.00mm)	-55°C to 125°C	2A	Active	ROHS3 Compliant
593D107X9016D2TE3	Vishay Sprague	100 µF	16 V	±10%	2917	Molded	125	0.122" (3.10mm)	-55°C to 125°C	1	Active	ROHS3 Compliant
593D107X9016E2TE3	Vishay Sprague	100 µF	16 V	±10%	2917	Molded	100	0.170" (4.32mm)	-55°C to 125°C	1	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalents (Molded Tantalum, MSL 1):

The KYOCERA AVX TAJ series parts (TAJY107K016A, TAJY107K016RNJ, TAJY107K016Y) are direct functional equivalents to the 1879057-1. All three parts maintain identical electrical specifications (100 µF, 16 V, ±10%, 900 mOhm ESR) and thermal operating range (-55°C to 125°C). These parts are active products with ROHS3 compliance. The primary difference is reduced seated height (0.079" versus 0.118"), which provides a design advantage for space-constrained applications. TAJY107K016RNJ is supplied in Tape & Reel packaging, while TAJY107K016A and TAJY107K016Y are supplied in standard packaging configurations.

Compatible Alternatives (Molded Tantalum, MSL 1, Lower ESR):

The Vishay Sprague 293D and 593D series molded tantalum capacitors meet all primary substitution criteria with improved ESR performance. The 293D107X9016D2TE3 and 293D107X9016E2TE3 feature 600 mOhm ESR, while the 593D107X9016D2TE3 and 593D107X9016E2TE3 feature 125 mOhm and 100 mOhm ESR respectively. All are active products with ROHS3 compliance and MSL 1 rating. These parts are electrically superior due to lower ESR, which reduces heat generation and improves transient response characteristics.

Similar Parts (Conformal Coated Tantalum, MSL 2A):

The Vishay Sprague 591D and 592D series conformal coated tantalum capacitors meet all primary electrical specifications but differ in construction type and moisture sensitivity classification (MSL 2A versus MSL 1). These parts feature significantly lower ESR (75 mOhm to 150 mOhm) and are suitable for applications requiring enhanced environmental protection. The conformal coating introduces different dimensional characteristics and moisture handling requirements. Selection of conformal coated variants requires verification of assembly process compatibility with MSL 2A handling procedures.

Frequently Asked Questions (FAQ)

Q: Can TAJY107K016A be used as a direct replacement for 1879057-1?

A: Yes. TAJY107K016A meets all primary electrical and mechanical specifications: 100 µF capacitance, 16 V rating, ±10% tolerance, 2917 package, 900 mOhm ESR, and -55°C to 125°C operating range. The reduced seated height (0.079" versus 0.118") is a physical improvement that does not affect electrical compatibility. ROHS3 compliance provides regulatory advantage over the obsolete part.

Q: What is the difference between TAJY107K016A and TAJY107K016RNJ?

A: Both parts are electrically and mechanically identical. The primary difference is packaging format: TAJY107K016RNJ is supplied in Tape & Reel (TR) configuration for automated assembly, while TAJY107K016A is supplied in standard packaging. Selection depends on procurement and assembly process requirements.

Q: Are Vishay Sprague 293D and 593D series parts compatible with 1879057-1?

A: Yes, with performance enhancement. These parts maintain identical capacitance (100 µF), voltage rating (16 V), tolerance (±10%), package (2917), and operating temperature range (-55°C to 125°C). The key difference is reduced ESR: 293D series features 600 mOhm, and 593D series features 125 mOhm or 100 mOhm. Lower ESR improves circuit performance by reducing heat dissipation and improving transient response. All are active products with ROHS3 compliance.

Q: Can conformal coated parts (591D, 592D series) replace the 1879057-1?

A: Conformal coated parts meet all primary electrical specifications but introduce differences in construction type and moisture sensitivity level (MSL 2A versus MSL 1). These parts feature superior ESR performance (75 mOhm to 150 mOhm) and enhanced environmental protection. Selection requires verification that assembly processes comply with MSL 2A handling requirements, including bake-out procedures and moisture exposure limits.

Q: Why do substitute parts have different seated heights?

A: Seated height variation reflects different internal construction and lead frame designs among manufacturers. Height differences do not affect electrical performance or functional compatibility. Design verification is required only if PCB layout includes height-constrained clearances or if the application specifies maximum height limitations.

Q: What does MSL 1 (Unlimited) mean compared to MSL 2A (4 Weeks)?

A: MSL 1 indicates unlimited shelf life without moisture exposure restrictions. MSL 2A requires component usage within 4 weeks of package opening or completion of a moisture bake-out procedure. Selection of MSL 2A parts requires implementation of moisture control procedures during storage and assembly. MSL 1 parts (KYOCERA AVX TAJ series and Vishay Sprague 293D/593D molded variants) eliminate these handling requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All active substitute parts listed are ROHS3 compliant. The original 1879057-1 does not specify RoHS status due to its obsolete classification. Selection of ROHS3 compliant alternatives ensures regulatory compliance for new designs and procurement.

Q: Which substitute part offers the best ESR performance?

A: The Vishay Sprague 591D107X9016D2T20H conformal coated capacitor features the lowest ESR at 75 mOhm. Among molded tantalum variants, the Vishay Sprague 593D107X9016E2TE3 features 100 mOhm ESR. Lower ESR reduces heat generation and improves circuit transient response. Selection depends on thermal and performance requirements specific to the application.

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