SR751C105KAATR1 Equivalent & Substitute Parts

Part Overview

The SR751C105KAATR1 is a 1 µF ±10% 100V ceramic capacitor 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 equipment operating between -55°C and 125°C. The part is ROHS3 compliant and currently active in production.

Substitute parts become necessary when the original SR751C105KAATR1 is unavailable due to supply constraints, inventory depletion, or when alternative packaging formats better suit manufacturing requirements. The substitute parts listed maintain electrical equivalence while offering different physical configurations and lead styles.

Substiute Parts

SR751C105KAATR1

KYOCERA AVXIn Stock: 968SR751C105KAATR1 Datasheet

Current PartRFQ

SR401C105KAATR1

KYOCERA AVXIn Stock: 2959SR401C105KAATR1 Datasheet

DirectRFQ

FK20X7R2A105KN000

TDK CorporationIn Stock: 1974FK20X7R2A105KN000 Datasheet

DirectRFQ

FK22X7R2A105KN000

TDK CorporationIn Stock: 47649FK22X7R2A105KN000 Datasheet

DirectRFQ

FK26X7R2A105KN000

TDK CorporationIn Stock: 6741FK26X7R2A105KN000 Datasheet

DirectRFQ

RDER72A105K2K1H03B

Murata ElectronicsIn Stock: 3570RDER72A105K2K1H03B Datasheet

DirectRFQ

RDER72A105K2M1H03A

Murata ElectronicsIn Stock: 12257RDER72A105K2M1H03A Datasheet

DirectRFQ

RDER72A105K2S1H03A

Murata ElectronicsIn Stock: 2859RDER72A105K2S1H03A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SR751C105KAATR1 is determined by strict electrical and mechanical parameter matching:

Electrical Equivalence Requirements:

• Capacitance: 1 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage Rating: 100V (exact match required)
• Temperature Coefficient: X7R (exact match required)
• Operating Temperature Range: -55°C to 125°C (exact match required)

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole (exact match required)
• Package Type: Radial (exact match required)
• Lead Spacing: 0.197" to 0.200" (5.00mm to 5.08mm acceptable tolerance)

Compliance Requirements:

• RoHS3 Compliant (mandatory)
• REACH Unaffected (mandatory)

All substitute parts listed meet these criteria. Variations in physical dimensions (length, width, height) and lead style (formed leads, kinked leads, straight leads) do not affect electrical performance but may impact PCB layout and mechanical assembly considerations.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SR401C105KAATR1

The SR401C105KAATR1 is the preferred direct substitute. Manufactured by KYOCERA AVX, it maintains identical electrical specifications and is currently active in production. The only difference is packaging format (Cut Tape versus Tape & Reel), which does not affect component performance. This part offers 2,861 units in current inventory.

Secondary Recommendations: Murata Electronics RDE Series

The RDER72A105K2M1H03A and RDER72A105K2K1H03B are active production alternatives from Murata Electronics. Both maintain full electrical equivalence with identical capacitance, voltage, temperature coefficient, and operating range. These parts are suitable for applications where lead spacing of 0.197" (5.00mm) is acceptable. The RDER72A105K2M1H03A is available in Cut Tape packaging with 12,231 units in stock.

Alternative Option: RDER72A105K2S1H03A (Manufacturer Recommended)

This Murata part is designated as the manufacturer-recommended substitute. It differs from other RDE series options by featuring 0.098" (2.50mm) lead spacing and formed leads without kinking. This configuration may require PCB layout modification but is suitable for compact designs. The part is active in production with 2,798 units available.

Legacy Alternatives: TDK FK Series

The FK20X7R2A105KN000, FK22X7R2A105KN000, and FK26X7R2A105KN000 are electrically equivalent but carry "Not For New Designs" status. These parts are suitable only for legacy system maintenance or repair applications where original component sourcing is critical. All three maintain full electrical equivalence with different physical dimensions.

Selection Criteria:

• For new designs: Select SR401C105KAATR1 or active Murata RDE series parts
• For legacy systems: TDK FK series parts remain electrically valid despite discontinued status
• For high-volume production: Verify packaging format compatibility (Tape & Reel, Cut Tape, or Bulk) with assembly equipment
• For space-constrained layouts: RDER72A105K2S1H03A offers the smallest lead spacing at 0.098" (2.50mm)

Frequently Asked Questions (FAQ)

Q: Can I use RDER72A105K2S1H03A as a direct replacement for SR751C105KAATR1?

A: Electrically, yes. The RDER72A105K2S1H03A is fully equivalent in capacitance, voltage, tolerance, and temperature coefficient. However, the lead spacing differs (0.098" versus 0.200"), requiring PCB layout verification before substitution.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Both are tape formats for automated assembly. Tape & Reel (TR) is supplied on a reel for high-speed pick-and-place machines. Cut Tape (CT) is supplied in smaller quantities on tape strips. Electrical performance is identical; selection depends on production volume and equipment compatibility.

Q: Are TDK FK series parts still usable despite "Not For New Designs" status?

A: Yes. This status indicates the manufacturer has discontinued these parts for new product development. However, they remain electrically and mechanically equivalent and are suitable for repair, maintenance, or legacy system applications where original specifications must be maintained.

Q: What does X7R temperature coefficient mean?

A: X7R indicates the capacitance change across the operating temperature range (-55°C to 125°C) is within ±15% of the nominal value at 25°C. This stability makes X7R suitable for general-purpose applications across wide temperature ranges.

Q: Can I substitute a part with different physical dimensions?

A: Physical dimensions (length, width, height) do not affect electrical performance. However, they impact PCB layout and mechanical assembly. Verify that the substitute part's dimensions fit your PCB footprint and mechanical constraints before implementation.

Q: What is the significance of lead spacing differences?

A: Lead spacing determines the PCB hole pattern. The SR751C105KAATR1 uses 0.200" (5.08mm) spacing, while most substitutes use 0.197" (5.00mm). This 0.003" difference is within standard PCB tolerance but should be verified against your specific board design. The RDER72A105K2S1H03A uses 0.098" (2.50mm) spacing and requires a different footprint.

Q: Are all listed parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.