KSC2328AYBU Equivalent & Substitute Parts

Part Overview

The KSC2328AYBU is a small-signal NPN bipolar junction transistor manufactured by onsemi, designed for general-purpose switching and amplification applications. This device operates at a maximum collector current of 2 A with a collector-emitter breakdown voltage of 30 V and delivers 1 W maximum power dissipation. The transistor is housed in a TO-92-3 through-hole package suitable for through-hole PCB assembly.

The KSC2328AYBU is classified as Last Time Buy, indicating that onsemi has discontinued or will discontinue production. This status necessitates identification of equivalent substitute parts to ensure design continuity and supply chain reliability for existing applications and new designs requiring this performance class.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) (Max)	2	A
Voltage - Collector Emitter Breakdown (Max)	30	V
Vce Saturation (Max) @ Ib, Ic	2V @ 30mA, 1.5A	—
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) (Min) @ Ic, Vce	160 @ 500mA, 2V	—
Power - Max	1	W
Frequency - Transition	120	MHz
Operating Temperature (TJ)	150	°C
Mounting Type	Through Hole	—
Package / Case	TO-92-3	—

Substitute Part Grouping Explanation

Substitution of the KSC2328AYBU is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Parameters (Must Match):

Transistor Type: NPN
Maximum Collector Current (Ic): 2 A
Collector-Emitter Breakdown Voltage (VCEO): 30 V
DC Current Gain (hFE): 160 minimum @ 500mA, 2V
Vce Saturation: 2V @ 30mA, 1.5A
Collector Cutoff Current (ICBO): 100 nA maximum
Transition Frequency: 120 MHz
Maximum Power Dissipation: 1 W
Operating Temperature: 150°C (TJ)

Mechanical Parameters (Must Match):

Mounting Type: Through Hole
Package: TO-92-3

Parts meeting all specified electrical and mechanical parameters are classified as parametric equivalents and direct substitutes. No derating or performance compromise occurs when substituting between qualified parts.

Parameter Comparison

Parameter	KSC2328AYBU (onsemi)	KSC2328AYBU (Fairchild Semiconductor)
Transistor Type	NPN	NPN
Current - Collector (Ic) (Max)	2 A	2 A
Voltage - Collector Emitter Breakdown (Max)	30 V	30 V
Vce Saturation (Max) @ Ib, Ic	2V @ 30mA, 1.5A	2V @ 30mA, 1.5A
Current - Collector Cutoff (Max)	100 nA	100 nA
DC Current Gain (hFE) (Min) @ Ic, Vce	160 @ 500mA, 2V	160 @ 500mA, 2V
Power - Max	1 W	1 W
Frequency - Transition	120 MHz	120 MHz
Operating Temperature (TJ)	150°C	150°C
Mounting Type	Through Hole	Through Hole
Package / Case	TO-92-3	TO-92-3
Product Status	Last Time Buy	Active
RoHS Status	ROHS3 Compliant	Not specified

Engineering Selection Recommendations

The KSC2328AYBU manufactured by Fairchild Semiconductor is a direct parametric equivalent to the onsemi KSC2328AYBU. Both parts share identical electrical specifications and mechanical packaging, enabling pin-for-pin substitution without circuit modification.

Selection Basis:

The onsemi KSC2328AYBU carries Last Time Buy status, indicating production discontinuation. The Fairchild Semiconductor KSC2328AYBU maintains Active product status, ensuring continued availability and supply chain stability.

Both parts are RoHS3 compliant or unaffected by REACH regulations, supporting compliance requirements for modern electronics manufacturing. The Fairchild part is classified under ECCN EAR99 and HTSUS 8542.39.0001, consistent with standard export and tariff classifications for semiconductor components.

For applications currently using the onsemi KSC2328AYBU, transition to the Fairchild Semiconductor equivalent presents no electrical or mechanical compatibility concerns. Existing PCB designs, bill of materials, and circuit layouts require no modification.

Frequently Asked Questions (FAQ)

Q: Can the Fairchild Semiconductor KSC2328AYBU replace the onsemi KSC2328AYBU in existing designs?

A: Yes. Both parts are parametric equivalents with identical electrical specifications and TO-92-3 package dimensions. No circuit modifications, PCB layout changes, or performance derating are required.

Q: What makes these parts substitutable?

A: Substitutability is determined by matching all specified electrical parameters (collector current, breakdown voltage, current gain, saturation voltage, cutoff current, transition frequency, power rating, and operating temperature) and mechanical parameters (through-hole mounting and TO-92-3 package). Both parts meet these criteria exactly.

Q: Why is the onsemi KSC2328AYBU listed as Last Time Buy?

A: Last Time Buy status indicates that onsemi has announced the end of production for this part number. Customers requiring this device should transition to equivalent alternatives to ensure long-term supply availability.

Q: Are there any compliance differences between the two parts?

A: The onsemi part is explicitly RoHS3 compliant. The Fairchild part's RoHS status is not specified in the provided data. Both parts are classified under standard export control (EAR99) and tariff codes appropriate for semiconductor transistors.

Q: Can I use these parts interchangeably in high-frequency applications?

A: Yes. Both parts specify a transition frequency of 120 MHz, supporting applications requiring this performance level. The identical frequency specification ensures equivalent behavior in switching and amplification circuits operating within this bandwidth.

Q: What is the significance of the TO-92-3 package?

A: The TO-92-3 package is a three-lead through-hole configuration with standardized pin spacing and lead geometry. Both substitute parts use this identical package, ensuring mechanical compatibility with existing PCB footprints and assembly processes.

Q: Are there inventory considerations when selecting a substitute?

A: The onsemi KSC2328AYBU shows 6224 pieces in stock as new original inventory. Availability of the Fairchild equivalent should be verified through current supplier inventory systems, as stock levels fluctuate independently of parametric equivalence.

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