SR125C104KAR: 0.1 µF 50V X7R Ceramic Capacitor Equivalent & Substitute Parts

Part Overview

The SR125C104KAR is a 0.1 µF ±10% 50V X7R ceramic capacitor manufactured by KYOCERA AVX in the SkyCap® SR series. This radial through-hole component is designed for general-purpose applications requiring stable capacitance across a wide temperature range (-55°C to 125°C). The part is ROHS3 compliant and currently active in production. Equivalent and substitute parts are identified based on matching electrical specifications (capacitance, voltage rating, temperature coefficient) and compatible mechanical parameters (mounting type, lead configuration, package dimensions).

Key Parameters

Parameter	Value
Capacitance	0.1 µF
Tolerance	±10%
Voltage Rating	50V
Temperature Coefficient	X7R
Operating Temperature Range	-55°C to 125°C
Mounting Type	Through Hole
Package Type	Radial
Lead Style	Formed Leads
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the SR125C104KAR is determined by strict equivalence in the following parameters:

Electrical Match: Capacitance (0.1 µF), tolerance (±10%), voltage rating (50V), and temperature coefficient (X7R) must be identical
Mechanical Compatibility: Through-hole radial mounting with formed leads
Compliance: ROHS3 compliance and REACH unaffected status required
Lead Configuration: Acceptable variations include formed leads (straight or kinked) with lead spacing between 0.100" and 0.200"
Physical Dimensions: Radial package footprint with height-seated maximum between 0.100" and 0.300"

Substitute parts are grouped by manufacturer and packaging format. All listed substitutes meet the core electrical and mechanical requirements for direct replacement in applications designed for the SR125C104KAR.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Temp Coeff	Packaging	Lead Spacing	Height (Max)	Lead Style	Status	Inventory
SR125C104KAR	KYOCERA AVX	0.1 µF	50V	X7R	Bulk	0.200"	0.230"	Formed Leads	Active	1027 Pcs
SR075C104KARTR1	KYOCERA AVX	0.1 µF	50V	X7R	Cut Tape	0.100"	0.100"	Formed Leads - Kinked	Active	1821 Pcs
SR205C104KAA	KYOCERA AVX	0.1 µF	50V	X7R	Bulk	0.100"	0.200"	Straight	Active	1482 Pcs
SR215C104KAATR2	KYOCERA AVX	0.1 µF	50V	X7R	Cut Tape	0.200"	0.300"	Formed Leads - Kinked	Active	18045 Pcs
SR215C104KAR	KYOCERA AVX	0.1 µF	50V	X7R	Bulk	0.200"	0.200"	Formed Leads - Kinked	Active	10143 Pcs
SR215C104KARTR1	KYOCERA AVX	0.1 µF	50V	X7R	Cut Tape	0.200"	0.300"	Formed Leads - Kinked	Active	4200 Pcs
SR215C104KARTR2	KYOCERA AVX	0.1 µF	50V	X7R	Cut Tape	0.200"	0.300"	Formed Leads - Kinked	Active	48380 Pcs
C317C104K5R5TA	KEMET	0.1 µF	50V	X7R	Bulk	0.200"	0.200"	Formed Leads	Active	7890 Pcs
FK28X7R1H104KN000	TDK Corporation	0.1 µF	50V	X7R	Bulk	0.197"	0.217"	Formed Leads - Kinked	Not For New Designs	183046 Pcs
K104K10X7RF53H5	Vishay Beyschlag/Draloric/BC Components	0.1 µF	50V	X7R	Bulk	0.197"	0.244"	Formed Leads	Active	11819 Pcs
K104K10X7RF5TH5	Vishay Beyschlag/Draloric/BC Components	0.1 µF	50V	X7R	Cut Tape	0.197"	0.244"	Formed Leads	Active	48630 Pcs

Engineering Selection Recommendations

KYOCERA AVX SkyCap® SR Series (Preferred): SR215C104KARTR2, SR215C104KAR, SR215C104KARTR1, SR205C104KAA, and SR075C104KARTR1 are all active production parts with ROHS3 compliance. These parts maintain identical electrical specifications and are manufactured by the same supplier as the SR125C104KAR, ensuring consistency in performance and reliability. SR215C104KARTR2 offers the highest inventory availability (48,380 pcs).

KEMET GoldMax 300 Comm X7R (Cross-Manufacturer Alternative): C317C104K5R5TA is an active production equivalent from KEMET with matching electrical and mechanical parameters. This part is suitable for applications requiring a qualified alternative source.

Vishay Mono-Kap™ K Series (Cross-Manufacturer Alternative): K104K10X7RF5TH5 (cut tape) and K104K10X7RF53H5 (bulk) are active production parts with matching specifications. These parts are suitable for applications where multi-source qualification is required.

TDK FK Series (Legacy Status): FK28X7R1H104KN000 is marked "Not For New Designs" and should be used only for maintenance or repair of existing equipment. Despite high inventory availability, this part is not recommended for new designs.

Frequently Asked Questions (FAQ)

Q: Can SR075C104KARTR1 replace SR125C104KAR directly? A: SR075C104KARTR1 matches all electrical specifications (0.1 µF, 50V, X7R, ±10%) and is a through-hole radial component. However, it has a reduced lead spacing (0.100" vs. 0.200") and lower seated height (0.100" vs. 0.230"). Verify PCB footprint compatibility before substitution.

Q: What is the difference between bulk and cut tape packaging? A: Bulk packaging is supplied loose in containers, while cut tape (CT) packaging provides components on carrier tape for automated assembly. Both formats contain identical components; packaging selection depends on assembly process requirements.

Q: Why is FK28X7R1H104KN000 marked "Not For New Designs"? A: This TDK part is in legacy status, indicating the manufacturer is phasing it out. While electrically equivalent, it should not be selected for new product designs. Use active production alternatives instead.

Q: Are lead spacing variations critical for substitution? A: Lead spacing affects PCB footprint compatibility. The SR125C104KAR uses 0.200" spacing. Substitutes with 0.100" or 0.197" spacing may require PCB redesign. Verify footprint dimensions before selecting an alternative.

Q: Do all listed substitutes have identical temperature performance? A: Yes. All substitutes use X7R temperature coefficient with -55°C to 125°C operating range, matching the SR125C104KAR. X7R specification ensures capacitance stability across this temperature range.

Q: Which substitute offers the best inventory availability? A: SR215C104KARTR2 (KYOCERA AVX, cut tape) has the highest inventory at 48,380 pcs, followed by FK28X7R1H104KN000 (TDK, 183,046 pcs). However, TDK's legacy status makes SR215C104KARTR2 the preferred high-availability option.

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