SR145C103KAT Equivalent & Substitute Parts

Part Overview

The SR145C103KAT is a 10000 pF ±10% 50V ceramic capacitor with X7R temperature coefficient manufactured by KYOCERA AVX in the SkyCap® SR series. This radial through-hole component is designed for general-purpose applications and operates across -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, tolerance, temperature coefficient) and mechanical compatibility (lead spacing, mounting type, package configuration).

Key Parameters

Parameter	Value
Capacitance	10000 pF
Tolerance	±10%
Voltage Rating	50V
Temperature Coefficient	X7R
Operating Temperature Range	-55°C to 125°C
Mounting Type	Through Hole
Package Type	Radial
Lead Spacing	0.100" (2.54mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Direct Substitutes maintain identical electrical specifications: 10000 pF capacitance, ±10% tolerance, 50V voltage rating, X7R temperature coefficient, and -55°C to 125°C operating range. These parts differ only in physical dimensions (body length and height) and lead style (kinked versus straight), which do not affect electrical performance but may impact PCB layout compatibility. Direct substitutes include packaging variants (Bulk and Cut Tape) of the same electrical specification.

Upgrade Substitutes provide enhanced electrical performance with higher voltage ratings (100V) while maintaining the same capacitance, temperature coefficient, and operating range. These parts are backward compatible in 50V applications and offer improved safety margin.

Cross-Manufacturer Substitutes from KEMET maintain identical electrical and mechanical specifications, enabling interchangeability with equivalent performance characteristics.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Tolerance	Voltage	Temp Coeff	Lead Style	Body Length	Height (Max)	Packaging	Inventory
SR145C103KAT	KYOCERA AVX	10000 pF	±10%	50V	X7R	Kinked	0.200"	0.300"	Bulk	899 Pcs
SR075C103KAATR1	KYOCERA AVX	10000 pF	±10%	50V	X7R	Kinked	0.150"	0.100"	Cut Tape	1691 Pcs
SR075C103KAR	KYOCERA AVX	10000 pF	±10%	50V	X7R	Kinked	0.150"	0.250"	Bulk	811 Pcs
SR155C103KAA	KYOCERA AVX	10000 pF	±10%	50V	X7R	Straight	0.150"	0.150"	Bulk	8648 Pcs
SR155C103KAR	KYOCERA AVX	10000 pF	±10%	50V	X7R	Straight	0.150"	0.150"	Bulk	11172 Pcs
SR155C103KARTR1	KYOCERA AVX	10000 pF	±10%	50V	X7R	Straight	0.150"	0.150"	Cut Tape	24461 Pcs
SR151C103JAR	KYOCERA AVX	10000 pF	±5%	100V	X7R	Straight	0.150"	0.150"	Bulk	1488 Pcs
SR151C103KAATR1	KYOCERA AVX	10000 pF	±10%	100V	X7R	Straight	0.150"	0.150"	Cut Tape	8095 Pcs
SR151C103KAR	KYOCERA AVX	10000 pF	±10%	100V	X7R	Straight	0.150"	0.150"	Bulk	2000 Pcs
SR151C103KARTR1	KYOCERA AVX	10000 pF	±10%	100V	X7R	Straight	0.150"	0.150"	Cut Tape	3195 Pcs
C315C103K5R5TA	KEMET	10000 pF	±10%	50V	X7R	Straight	0.150"	0.183"	Bulk	1215 Pcs

Engineering Selection Recommendations

Direct Substitution (50V Rating): Parts SR075C103KAATR1, SR075C103KAR, SR155C103KAA, SR155C103KAR, and SR155C103KARTR1 provide electrical equivalence to SR145C103KAT. Selection between these options depends on PCB layout constraints and packaging requirements. The SR155 series with straight leads offers the most compact profile (0.150" height) and highest inventory availability (24461 Pcs for cut tape variant). The SR075 series provides intermediate height options. All direct substitutes maintain ROHS3 compliance and identical operating temperature range.

Upgrade Substitution (100V Rating): Parts SR151C103JAR, SR151C103KAATR1, SR151C103KAR, and SR151C103KARTR1 operate at 100V with identical capacitance and temperature coefficient. These upgrades are suitable for applications where higher voltage margin is required and are backward compatible in 50V circuits. SR151C103KARTR1 offers the highest inventory (3195 Pcs) among 100V variants.

Cross-Manufacturer Option: KEMET C315C103K5R5TA maintains electrical equivalence with 50V rating and X7R temperature coefficient. This part is ROHS3 compliant and suitable for applications requiring multi-source qualification.

Frequently Asked Questions (FAQ)

Q: Can I substitute SR145C103KAT with SR155C103KARTR1? A: Yes. Both parts have identical electrical specifications (10000 pF, ±10%, 50V, X7R, -55°C to 125°C). The primary difference is physical dimensions: SR155C103KARTR1 has a shorter body (0.150" vs 0.200") and lower profile (0.150" vs 0.300"), with straight leads instead of kinked. Verify PCB layout compatibility before substitution.

Q: What is the difference between direct substitutes and upgrade substitutes? A: Direct substitutes maintain the 50V rating and ±10% tolerance of SR145C103KAT. Upgrade substitutes (SR151 series) provide 100V rating with either ±5% or ±10% tolerance. Upgrades are backward compatible in 50V applications and offer improved voltage safety margin.

Q: Does lead style (kinked vs. straight) affect electrical performance? A: No. Lead style affects only mechanical installation and PCB layout. Kinked leads provide pre-formed bends for specific hole spacing; straight leads require manual forming. Electrical performance is identical.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance matching the original SR145C103KAT specification.

Q: What packaging options are available? A: Substitute parts are available in Bulk and Cut Tape (CT) packaging. Cut Tape variants include TR1 designation and are suitable for automated assembly. Bulk packaging is appropriate for manual assembly or reel consolidation.

Q: Can I use KEMET C315C103K5R5TA as a direct replacement? A: Yes. The KEMET part maintains identical electrical specifications and 50V rating. Physical dimensions are comparable (0.150" body length, 0.183" height). Verify manufacturer qualification requirements for your application before implementation.

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