SR291C222KART Equivalent & Substitute Parts

Part Overview

The SR291C222KART is a 2200 pF ceramic capacitor rated at 100V with X7R temperature coefficient, manufactured by KYOCERA AVX in the SkyCap® SR series. This through-hole radial component is designed for general-purpose applications across industrial and commercial electronics. The part is currently active and in production, with 843 units available in bulk packaging.

Equivalent and substitute parts are identified based on matching electrical specifications (capacitance, voltage rating, tolerance, and temperature coefficient) and compatible mechanical parameters (mounting type, lead spacing, and package case style). Alternative sources and upgraded voltage ratings are provided for design flexibility and supply chain optimization.

Substiute Parts

SR291C222KART

KYOCERA AVXIn Stock: 935SR291C222KART Datasheet

Current PartRFQ

SR151C222KARTR2

KYOCERA AVXIn Stock: 2616SR151C222KARTR2 Datasheet

DirectRFQ

C315C222K1R5TA

KEMETIn Stock: 10965C315C222K1R5TA Datasheet

DirectRFQ

FK18X7R2A222KN020

TDK CorporationIn Stock: 2940FK18X7R2A222KN020 Datasheet

DirectRFQ

RDER72A222K0P1H03B

Murata ElectronicsIn Stock: 1644RDER72A222K0P1H03B Datasheet

DirectRFQ

C315C222K2R5TA

KEMETIn Stock: 2207C315C222K2R5TA Datasheet

UpgradeRFQ

C320C222K2R5TA

KEMETIn Stock: 2969C320C222K2R5TA Datasheet

UpgradeRFQ

C317C222K1R5TA

KEMETIn Stock: 10167C317C222K1R5TA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence in the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Capacitance: 2200 pF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage Rating: 100V minimum (equal or higher acceptable)
• Temperature Coefficient: X7R (exact match required)
• Operating Temperature: -55°C to 125°C (exact match required)

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial (exact match required)
• Lead Spacing: 0.100" (2.54mm) preferred; minor variations acceptable if PCB layout permits

Compliance Requirements:

• RoHS3 Compliant (mandatory)
• REACH Unaffected or compliant status

Parts are grouped into three categories:

1. Direct Equivalents – Identical electrical and mechanical specifications; different manufacturers or packaging formats
2. Upgraded Alternatives – Higher voltage rating (200V) with identical capacitance and tolerance; suitable for designs requiring increased voltage margin
3. Manufacturer-Recommended Alternatives – KEMET GoldMax 300 series with different lead spacing or lead style; electrically equivalent with minor mechanical variations

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (100V Rating):

SR151C222KARTR2 (KYOCERA AVX) and C315C222K1R5TA (KEMET) are the primary direct equivalents. Both maintain identical electrical specifications and 2.54mm lead spacing. SR151C222KARTR2 is available in cut tape packaging with higher inventory (2506 units). C315C222K1R5TA offers the largest inventory (10883 units) and is actively produced. Both are ROHS3 compliant and suitable for new designs.

C317C222K1R5TA (KEMET) is electrically equivalent but features 5.08mm lead spacing instead of 2.54mm. This part is suitable only if PCB layout accommodates the wider spacing.

For Designs Requiring Higher Voltage Margin:

C315C222K2R5TA and C320C222K2R5TA (both KEMET, 200V rating) provide upgraded voltage performance while maintaining identical capacitance and tolerance. C320C222K2R5TA matches the original physical footprint (5.08mm x 3.18mm) and is recommended for direct PCB substitution with enhanced voltage headroom. Both are active products with substantial inventory.

Parts Not Recommended for New Designs:

FK18X7R2A222KN020 (TDK Corporation) carries "Not For New Designs" status and should be avoided for new development, despite electrical equivalence. RDER72A222K0P1H03B (Murata Electronics) is active but features non-standard 2.50mm lead spacing, requiring PCB layout verification.

Frequently Asked Questions (FAQ)

Q: Can I substitute SR291C222KART with a 200V rated capacitor?

A: Yes. C315C222K2R5TA and C320C222K2R5TA are electrically and mechanically compatible upgrades with 200V ratings. Higher voltage rating does not degrade performance in 100V applications and provides additional safety margin. C320C222K2R5TA maintains the original 5.08mm x 3.18mm footprint for direct PCB substitution.

Q: What is the difference between formed leads and straight leads?

A: Lead style affects insertion into PCB holes and component orientation during assembly. Formed leads (kinked or pre-bent) are pre-positioned for specific hole spacing. Straight leads require manual bending or automated insertion equipment. Both styles are mechanically and electrically equivalent when lead spacing matches PCB requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliant status and REACH Unaffected designation, meeting current environmental and regulatory requirements.

Q: Why is FK18X7R2A222KN020 marked "Not For New Designs"?

A: This TDK part is in end-of-life status. While electrically equivalent, it is not recommended for new product development. Use C315C222K1R5TA, SR151C222KARTR2, or RDER72A222K0P1H03B as alternatives.

Q: Can I use a part with different lead spacing?

A: Lead spacing substitution requires PCB layout verification. C317C222K1R5TA uses 5.08mm spacing versus the standard 2.54mm. Verify hole positioning on your PCB before substitution. RDER72A222K0P1H03B uses 2.50mm spacing, which may require minor PCB adjustment.

Q: Which substitute offers the best inventory availability?

A: C315C222K1R5TA (KEMET) has the highest inventory at 10,883 units. C317C222K1R5TA (KEMET) is also well-stocked at 10,074 units. Both are suitable for high-volume production requirements.