SR155C331KAATR1 Equivalent & Substitute Parts

Part Overview

The SR155C331KAATR1 is a 330 pF ceramic capacitor rated at 50V with X7R temperature coefficient, manufactured by KYOCERA AVX in the SkyCap® SR series. This through-hole radial component is designed for general-purpose applications requiring stable capacitance across the operating temperature range of -55°C to 125°C. The part is currently active and in stock with 908 units available. Equivalent and substitute parts are identified for applications requiring alternative sourcing, inventory management, or specific packaging configurations.

Key Parameters

Parameter	Value
Capacitance	330 pF
Tolerance	±10%
Voltage Rating	50V
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 of the SR155C331KAATR1 is determined by electrical equivalence and mechanical compatibility. All substitute parts maintain identical electrical specifications: 330 pF capacitance, ±10% tolerance, 50V voltage rating, and X7R temperature coefficient with -55°C to 125°C operating range. All substitutes are through-hole radial ceramic capacitors with ROHS3 compliance and REACH unaffected status.

Mechanical variations exist in lead spacing, lead style, and seated height. The original part features 0.100" (2.54mm) lead spacing with straight leads and 0.150" (3.81mm) maximum seated height. Substitute parts may feature different lead spacing (0.098" or 0.197"), lead styles (straight, formed, or kinked), and seated heights (0.220" to 0.260"). These mechanical differences determine PCB layout compatibility and must be evaluated against specific board design requirements.

Parameter Comparison

Parameter	SR155C331KAATR1 (KYOCERA AVX)	K331K15X7RF5TH5 (Vishay)	K331K15X7RF5TL2 (Vishay)	RDER71H331K0K1H03B (Murata)
Capacitance	330 pF	330 pF	330 pF	330 pF
Tolerance	±10%	±10%	±10%	±10%
Voltage Rating	50V	50V	50V	50V
Temperature Coefficient	X7R	X7R	X7R	X7R
Operating Temperature	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package Type	Radial	Radial	Radial	Radial
Lead Spacing	0.100" (2.54mm)	0.197" (5.00mm)	0.098" (2.50mm)	0.197" (5.00mm)
Lead Style	Straight	Formed Leads	Straight	Formed Leads - Kinked
Height - Seated (Max)	0.150" (3.81mm)	0.260" (6.60mm)	0.220" (5.60mm)	0.236" (6.00mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Inventory (Pcs)	908	20,734	33,820	1,441

Engineering Selection Recommendations

All substitute parts maintain full electrical equivalence to the SR155C331KAATR1 and are suitable for direct functional replacement in applications requiring 330 pF, 50V, X7R ceramic capacitors. Selection among substitutes depends on mechanical fit within the PCB layout.

K331K15X7RF5TL2 (Vishay) offers the closest mechanical compatibility with 0.098" (2.50mm) lead spacing and straight leads, differing minimally from the original 0.100" (2.54mm) spacing. This part accommodates designs with tight lead spacing requirements and provides the lowest seated height at 0.220" (5.60mm) among substitutes.

K331K15X7RF5TH5 (Vishay) features 0.197" (5.00mm) lead spacing with formed leads and 0.260" (6.60mm) seated height, suitable for designs with wider lead spacing and greater vertical clearance.

RDER71H331K0K1H03B (Murata) provides 0.197" (5.00mm) lead spacing with kinked formed leads and 0.236" (6.00mm) seated height, appropriate for applications requiring formed lead geometry.

All substitutes carry ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the original part. Inventory availability ranges from 1,441 to 33,820 units across substitute options.

Frequently Asked Questions (FAQ)

Q: Are all substitute parts electrically identical to the SR155C331KAATR1?

A: Yes. All substitute parts maintain 330 pF capacitance, ±10% tolerance, 50V voltage rating, X7R temperature coefficient, and -55°C to 125°C operating temperature range. Electrical performance is equivalent across all options.

Q: What is the primary difference between substitute parts?

A: Mechanical parameters differ, specifically lead spacing, lead style, and seated height. The SR155C331KAATR1 features 0.100" lead spacing with straight leads. Substitutes vary between 0.098" and 0.197" lead spacing, with straight, formed, or kinked lead styles. These differences affect PCB layout compatibility.

Q: Can K331K15X7RF5TL2 be used as a direct drop-in replacement?

A: K331K15X7RF5TL2 offers the closest mechanical match with 0.098" (2.50mm) lead spacing and straight leads, differing minimally from the original 0.100" spacing. Compatibility depends on PCB hole tolerance and design specifications.

Q: Which substitute has the smallest footprint?

A: K331K15X7RF5TL2 has the lowest seated height at 0.220" (5.60mm), making it suitable for space-constrained applications.

Q: Are all substitutes RoHS and REACH compliant?

A: Yes. All substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the original SR155C331KAATR1.

Q: Which substitute has the highest inventory availability?

A: K331K15X7RF5TL2 (Vishay) has the highest inventory with 33,820 units in stock, followed by K331K15X7RF5TH5 with 20,734 units.

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