KSA992PTA Equivalent & Substitute Parts

Part Overview

The KSA992PTA is a PNP bipolar junction transistor manufactured by onsemi, rated for 120 V collector-emitter breakdown voltage and 50 mA maximum collector current. This component is packaged in a TO-92-3 through-hole configuration and is currently classified as obsolete. Due to its obsolete status, equivalent substitute parts from active product lines are necessary for ongoing design support and procurement continuity. The substitute parts listed maintain electrical and mechanical compatibility with the original KSA992PTA specification.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Current - Collector (Ic) (Max)	50	mA
Voltage - Collector Emitter Breakdown (Max)	120	V
Vce Saturation (Max) @ Ib, Ic	300 mV @ 1 mA, 10 mA	—
Current - Collector Cutoff (Max)	1	µA
Power - Max	500	mW
Frequency - Transition	100	MHz
Operating Temperature (TJ)	150	°C
Mounting Type	Through Hole	—
Package / Case	TO-92-3 (TO-226AA)	—

Substitute Part Grouping Explanation

Substitution of the KSA992PTA is determined by strict equivalence across the following electrical and mechanical parameters:

Transistor Type: PNP configuration
Maximum Collector Current: 50 mA
Collector-Emitter Breakdown Voltage: 120 V
Saturation Voltage: 300 mV @ 1 mA, 10 mA
Collector Cutoff Current: 1 µA
Maximum Power Dissipation: 500 mW
Transition Frequency: 100 MHz
Operating Temperature Range: 150°C (TJ)
Package Type: TO-92-3 through-hole configuration

All substitute parts maintain these core electrical specifications and physical packaging requirements. Variations in DC Current Gain (hFE) and packaging format (bulk versus cut tape) do not affect functional substitution within the defined parameter envelope.

Parameter Comparison

Parameter	KSA992PTA (onsemi)	KSA992FBTA (Fairchild)	KSA992FBU (onsemi)	KSA992FATA (onsemi)
Product Status	Obsolete	Active	Active	Active
Transistor Type	PNP	PNP	PNP	PNP
Current - Collector (Ic) (Max)	50 mA	50 mA	50 mA	50 mA
Voltage - Collector Emitter Breakdown (Max)	120 V	120 V	120 V	120 V
Vce Saturation (Max) @ Ib, Ic	300 mV @ 1 mA, 10 mA	300 mV @ 1 mA, 10 mA	300 mV @ 1 mA, 10 mA	300 mV @ 1 mA, 10 mA
Current - Collector Cutoff (Max)	1 µA	1 µA	1 µA	1 µA
DC Current Gain (hFE) (Min) @ Ic, Vce	200 @ 1 mA, 6 V	430 @ 1 mA, 6 V	300 @ 1 mA, 6 V	200 @ 1 mA, 6 V
Power - Max	500 mW	500 mW	500 mW	500 mW
Frequency - Transition	100 MHz	100 MHz	100 MHz	100 MHz
Operating Temperature (TJ)	150°C	150°C	150°C	150°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-92-3	TO-92-3	TO-92-3	TO-92-3
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
ECCN	EAR99	—	EAR99	EAR99

Engineering Selection Recommendations

KSA992FBTA (Fairchild Semiconductor): This part is classified as active and provides full electrical equivalence to the KSA992PTA. The higher DC Current Gain (430 @ 1 mA, 6 V) compared to the original specification (200 @ 1 mA, 6 V) does not violate substitution criteria, as it remains within acceptable operating parameters for PNP transistor applications. REACH compliance is confirmed. Packaging is supplied in bulk format.

KSA992FBU (onsemi): This part is manufactured by the same original equipment manufacturer (onsemi) and maintains active product status. DC Current Gain is specified at 300 @ 1 mA, 6 V, which is intermediate between the original and the Fairchild alternative. RoHS3 compliance is confirmed. Packaging is supplied in bulk format.

KSA992FATA (onsemi): This part is also manufactured by onsemi with active product status. DC Current Gain matches the original specification at 200 @ 1 mA, 6 V. RoHS3 compliance is confirmed. Packaging is supplied in cut tape format, suitable for automated assembly processes.

All three substitute parts satisfy the core electrical and mechanical requirements for direct replacement of the obsolete KSA992PTA. Selection among these alternatives should be based on procurement availability, packaging format requirements, and supply chain considerations.

Frequently Asked Questions (FAQ)

Q: Can KSA992FBTA, KSA992FBU, and KSA992FATA be used interchangeably with KSA992PTA?

A: Yes. All three substitute parts maintain identical electrical specifications for collector current, breakdown voltage, saturation voltage, cutoff current, power dissipation, transition frequency, and operating temperature. All are packaged in TO-92-3 through-hole configuration. Differences in DC Current Gain do not prevent functional substitution within the defined parameter envelope.

Q: What is the significance of the different DC Current Gain (hFE) values among the substitute parts?

A: DC Current Gain variation (200 to 430 @ 1 mA, 6 V) reflects normal manufacturing tolerance ranges for PNP transistors. All values remain within acceptable operating margins for circuits designed around the KSA992PTA specification. Circuit designs that do not depend on precise hFE matching are unaffected by this variation.

Q: Are there compliance or regulatory differences between the substitute parts?

A: All substitute parts maintain REACH Unaffected status. KSA992FBU and KSA992FATA are RoHS3 compliant. KSA992FBTA compliance status is not specified in the provided data. ECCN classification (EAR99) is confirmed for KSA992FBU and KSA992FATA. Verify compliance requirements with your specific application and regulatory jurisdiction.

Q: What is the difference between bulk and cut tape packaging?

A: Bulk packaging (KSA992FBTA, KSA992FBU) is suitable for manual assembly and small-quantity applications. Cut tape packaging (KSA992FATA) is designed for automated pick-and-place assembly processes. Electrical performance is identical; packaging selection depends on assembly methodology and production volume.

Q: Why is the KSA992PTA classified as obsolete?

A: Obsolete status indicates that the original manufacturer (onsemi) has discontinued production. The substitute parts listed are active products from onsemi and Fairchild Semiconductor that provide full electrical and mechanical equivalence, ensuring design continuity and procurement availability.

Q: Can I mix substitute parts within a single design or production run?

A: Yes. All substitute parts meet identical electrical specifications and physical packaging requirements. Mixing parts from different manufacturers or packaging formats within a single design or production run does not introduce functional incompatibility.

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