SR121C472KAATR2 Equivalent & Substitute Parts

Part Overview

The SR121C472KAATR2 is a 4700 pF ceramic capacitor rated at 100V with X7R temperature coefficient, manufactured by KYOCERA AVX under the SkyCap® SR series. This radial through-hole component is designed for general-purpose applications requiring stable capacitance across the operating temperature range of -55°C to 125°C. The part is ROHS3 compliant and currently active in production with 1,075 units in stock.

Equivalent and substitute parts are necessary when the original part number becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when lead spacing and physical dimensions must accommodate specific PCB layouts while maintaining identical electrical performance.

Key Parameters

Parameter	Value
Capacitance	4700 pF
Tolerance	±10%
Voltage Rating	100V
Temperature Coefficient	X7R
Operating Temperature Range	-55°C to 125°C
Mounting Type	Through Hole
Package Type	Radial
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the SR121C472KAATR2 is determined by strict equivalence in the following electrical parameters: capacitance value (4700 pF), tolerance (±10%), voltage rating (100V), and temperature coefficient (X7R). All substitute parts must maintain the operating temperature range of -55°C to 125°C and be through-hole radial components.

Mechanical variations in lead spacing, lead style (formed versus straight), physical dimensions, and packaging format (bulk, cut tape) do not affect electrical substitutability. These variations are acceptable provided the component can be physically accommodated within the PCB layout and assembly process.

All identified substitutes are manufactured by established component suppliers (KYOCERA AVX, Vishay Beyschlag/Draloric/BC Components, KEMET, and Murata Electronics) and maintain ROHS3 compliance and active product status.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Tolerance	Voltage	Temp Coeff	Operating Temp	Lead Spacing	Lead Style	Packaging
SR121C472KAATR2	KYOCERA AVX	4700 pF	±10%	100V	X7R	-55°C to 125°C	0.200" (5.08mm)	Formed Leads	Cut Tape (CT)
SR151C472KAR	KYOCERA AVX	4700 pF	±10%	100V	X7R	-55°C to 125°C	0.100" (2.54mm)	Straight	Bulk
SR151C472KARTR2	KYOCERA AVX	4700 pF	±10%	100V	X7R	-55°C to 125°C	0.100" (2.54mm)	Straight	Cut Tape (CT)
K472K15X7RH5UH5	Vishay Beyschlag/Draloric/BC Components	4700 pF	±10%	100V	X7R	-55°C to 125°C	0.197" (5.00mm)	Formed Leads	Cut Tape (CT)
K472K15X7RH5TL2	Vishay Beyschlag/Draloric/BC Components	4700 pF	±10%	100V	X7R	-55°C to 125°C	0.098" (2.50mm)	Straight	Cut Tape (CT)
C315C472K1R5TA	KEMET	4700 pF	±10%	100V	X7R	-55°C to 125°C	0.100" (2.54mm)	Straight	Bulk
C317C472K1R5TA	KEMET	4700 pF	±10%	100V	X7R	-55°C to 125°C	0.200" (5.08mm)	Formed Leads	Bulk
C320C472K1R5TA	KEMET	4700 pF	±10%	100V	X7R	-55°C to 125°C	0.100" (2.54mm)	Straight	Bulk
C322C472K1R5TA	KEMET	4700 pF	±10%	100V	X7R	-55°C to 125°C	0.200" (5.08mm)	Formed Leads	Bulk
RDER72A472K0M1H03A	Murata Electronics	4700 pF	±10%	100V	X7R	-55°C to 125°C	0.197" (5.00mm)	Formed Leads - Kinked	Cut Tape (CT)
RDER72A472K0K1H03B	Murata Electronics	4700 pF	±10%	100V	X7R	-55°C to 125°C	0.197" (5.00mm)	Formed Leads - Kinked	Bulk

Engineering Selection Recommendations

All listed substitute parts maintain identical electrical specifications and are suitable for direct replacement based on product status and compliance certifications. Selection among substitutes should be determined by PCB layout requirements and assembly process compatibility.

For applications requiring 0.200" (5.08mm) lead spacing matching the original SR121C472KAATR2, the C317C472K1R5TA and C322C472K1R5TA from KEMET, or the K472K15X7RH5UH5 and RDER72A472K0M1H03A parts are electrically equivalent options.

For designs accommodating 0.100" (2.54mm) lead spacing, the SR151C472KAR, SR151C472KARTR2, C315C472K1R5TA, and C320C472K1R5TA provide equivalent performance with reduced footprint.

All parts carry ROHS3 compliance, REACH unaffected status, and EAR99 ECCN classification. Inventory availability varies by part number and packaging format.

Frequently Asked Questions (FAQ)

Q: Can I substitute a part with different lead spacing? A: Yes. Lead spacing is a mechanical parameter that does not affect electrical performance. Substitution is valid provided the PCB layout accommodates the different spacing and the component can be properly inserted and soldered.

Q: What is the difference between formed leads and straight leads? A: Formed leads are pre-bent for insertion into standard 0.200" (5.08mm) spaced holes. Straight leads require manual bending or are used in designs with closer hole spacing. Both styles are electrically equivalent.

Q: Does packaging format affect electrical performance? A: No. Bulk and cut tape packaging formats contain identical components. Packaging selection is determined by assembly process requirements and inventory management practices.

Q: Are all substitutes ROHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant and suitable for applications requiring lead-free components.

Q: Can I use KEMET parts as direct replacements for KYOCERA AVX parts? A: Yes. The KEMET C315C, C317C, C320C, and C322C series parts are electrically identical to the SR121C472KAATR2. Selection depends on lead spacing and physical dimensions required by your PCB design.

Q: What is the difference between the Murata RDER72A472K0M1H03A and RDER72A472K0K1H03B? A: Both parts are electrically identical. The difference is packaging format: RDER72A472K0M1H03A is supplied in cut tape, while RDER72A472K0K1H03B is supplied in bulk.

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