KSA916YBU Equivalent & Substitute Parts

Part Overview

The KSA916YBU is a PNP bipolar junction transistor manufactured by onsemi, rated for 120V collector-emitter breakdown voltage and 800mA maximum collector current. This device is packaged in a TO-92-3 through-hole configuration and is designed for small-signal switching and amplification applications with a maximum power dissipation of 900mW.

The KSA916YBU is classified as an obsolete product. Identification of equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Current - Collector (Ic) (Max)	800	mA
Voltage - Collector Emitter Breakdown (Max)	120	V
Vce Saturation (Max) @ Ib, Ic	1V @ 50mA, 500mA	—
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) (Min) @ Ic, Vce	120	@ 100mA, 5V
Power - Max	900	mW
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 KSA916YBU is determined by electrical and mechanical parameter equivalence. The following criteria establish substitution validity:

Electrical Parameters (Must Match):

Transistor Type: PNP
Maximum Collector Current (Ic): 800mA
Maximum Collector-Emitter Breakdown Voltage: 120V
Maximum Power Dissipation: 900mW
Transition Frequency: 120MHz
Operating Temperature Range: 150°C (TJ)
Saturation Voltage (Vce): 1V @ 50mA, 500mA
Collector Cutoff Current (ICBO): 100nA

Mechanical Parameters (Must Match):

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

The KSA916YTA meets all specified electrical and mechanical parameters and is therefore classified as a direct equivalent substitute for the KSA916YBU.

Parameter Comparison

Parameter	KSA916YBU (onsemi)	KSA916YTA (Fairchild Semiconductor)	Match
Transistor Type	PNP	PNP	✓
Current - Collector (Ic) (Max)	800 mA	800 mA	✓
Voltage - Collector Emitter Breakdown (Max)	120 V	120 V	✓
Vce Saturation (Max) @ Ib, Ic	1V @ 50mA, 500mA	1V @ 50mA, 500mA	✓
Current - Collector Cutoff (Max)	100nA (ICBO)	100nA (ICBO)	✓
DC Current Gain (hFE) (Min) @ Ic, Vce	120 @ 100mA, 5V	100 @ 100mA, 5V	◐
Power - Max	900 mW	900 mW	✓
Frequency - Transition	120MHz	120MHz	✓
Operating Temperature	150°C (TJ)	150°C (TJ)	✓
Mounting Type	Through Hole	Through Hole	✓
Package / Case	TO-92-3	TO-92-3	✓
Product Status	Obsolete	Active	—

Engineering Selection Recommendations

The KSA916YTA manufactured by Fairchild Semiconductor is a direct electrical and mechanical equivalent to the KSA916YBU. Both devices share identical maximum ratings for collector current, breakdown voltage, power dissipation, and transition frequency. Both are packaged in TO-92-3 through-hole configuration, enabling direct pin-compatible substitution.

The primary distinction between these parts is product status: the KSA916YBU is classified as obsolete, while the KSA916YTA is active and currently in production. This status difference, combined with the KSA916YTA's higher inventory availability (2039 units in stock versus 690 units for the KSA916YBU), establishes the KSA916YTA as the preferred selection for new designs and ongoing production requirements.

Both devices carry ECCN classification EAR99 and are REACH-compliant, confirming regulatory equivalence for export and environmental compliance purposes.

Frequently Asked Questions (FAQ)

Q: Can the KSA916YTA be used as a direct replacement for the KSA916YBU in existing circuit designs?

A: Yes. The KSA916YTA is electrically and mechanically equivalent to the KSA916YBU. Both devices are PNP transistors with identical maximum ratings (120V, 800mA, 900mW), identical saturation characteristics, and identical TO-92-3 through-hole packaging. Direct substitution is supported without circuit modification.

Q: What is the difference in DC current gain between these parts?

A: The KSA916YBU specifies a minimum DC current gain (hFE) of 120 at 100mA collector current and 5V collector-emitter voltage. The KSA916YTA specifies a minimum hFE of 100 under identical test conditions. This 20-unit difference represents a lower guaranteed gain floor for the KSA916YTA. Circuit designs that depend on minimum hFE values of 120 or higher must account for this specification variance.

Q: Are there any compliance or certification differences between these parts?

A: Both devices carry identical ECCN classification (EAR99) and are REACH-compliant. No compliance or certification barriers exist to substitution.

Q: Why is the KSA916YBU classified as obsolete?

A: The KSA916YBU is listed as an obsolete product by onsemi. The KSA916YTA, manufactured by Fairchild Semiconductor, remains in active production and is the recommended selection for applications requiring long-term supply continuity.

Q: Are the lead formations identical between these parts?

A: Both devices are supplied in TO-92-3 through-hole packaging. The KSA916YTA is specified with formed leads, while the KSA916YBU specification does not explicitly detail lead formation. Both packages are mechanically compatible with standard TO-92-3 footprints and breadboard or PCB through-hole mounting.

Q: What inventory considerations apply to these parts?

A: The KSA916YBU has 690 units in stock (new original). The KSA916YTA has 2039 units in stock (new original). For applications requiring immediate availability or high-volume procurement, the KSA916YTA offers superior supply position.

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