KSD1616-Y-AP Equivalent & Substitute Parts

Part Overview

The KSD1616-Y-AP is an NPN bipolar junction transistor manufactured by Micro Commercial Co, rated for 50 V collector-emitter breakdown voltage and 1 A maximum collector current in a TO-92 through-hole package. This device is classified as obsolete, necessitating identification of active equivalent parts for ongoing production and maintenance applications. The KSD1616-Y-AP delivers 750 mW power dissipation with a 160 MHz transition frequency, suitable for general-purpose switching and amplification circuits.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	50	V
Current - Collector (Ic) (Max)	1	A
Power - Max	750	mW
Frequency - Transition	160	MHz
Vce Saturation (Max) @ Ib, Ic	300 mV @ 50 mA, 1 A	—
DC Current Gain (hFE) (Min) @ Ic, Vce	135 @ 100 mA, 2 V	—
Current - Collector Cutoff (Max)	100	nA
Operating Temperature Range	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-92-3 (TO-226AA)	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the KSD1616-Y-AP is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Transistor type must be NPN
Collector-emitter breakdown voltage must equal or exceed 50 V
Maximum collector current must equal or exceed 1 A
Power dissipation must equal or exceed 750 mW
Transition frequency must equal or exceed 160 MHz
Vce saturation characteristics must be compatible at specified bias conditions
DC current gain (hFE) must meet or exceed minimum specifications

Mechanical Compatibility Criteria:

Package type must be TO-92-3 (TO-226AA) through-hole configuration
Lead formation must be compatible with existing PCB layouts

Compliance Criteria:

RoHS3 compliance required for environmental standards adherence

The substitute parts KSD1616AYTA and KSD1616AGTA satisfy these criteria with enhanced voltage ratings (60 V) and active product status, providing superior reliability for new designs while maintaining backward compatibility with existing applications.

Parameter Comparison

Parameter	KSD1616-Y-AP (Main)	KSD1616AYTA (onsemi)	KSD1616AGTA (Fairchild)
Manufacturer	Micro Commercial Co	onsemi	Fairchild Semiconductor
Product Status	Obsolete	Active	Active
Transistor Type	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	50 V	60 V	60 V
Current - Collector (Ic) (Max)	1 A	1 A	1 A
Power - Max	750 mW	750 mW	750 mW
Frequency - Transition	160 MHz	160 MHz	160 MHz
Vce Saturation (Max) @ Ib, Ic	300 mV @ 50 mA, 1 A	300 mV @ 50 mA, 1 A	300 mV @ 50 mA, 1 A
Current - Collector Cutoff (Max)	100 nA	100 nA	100 nA
DC Current Gain (hFE) (Min) @ Ic, Vce	135 @ 100 mA, 2 V	135 @ 100 mA, 2 V	200 @ 100 mA, 2 V
Operating Temperature Range	-55 to 150 °C	Up to 150 °C	Up to 150 °C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-92-3	TO-92-3	TO-92-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified

Engineering Selection Recommendations

KSD1616AYTA (onsemi) is the primary substitute for the KSD1616-Y-AP. This part maintains electrical equivalence across all critical parameters while offering active product status and ROHS3 compliance certification. The 60 V collector-emitter breakdown voltage provides 20% margin above the original specification, enhancing circuit reliability. Availability of 14,571 units ensures supply continuity for production applications.

KSD1616AGTA (Fairchild Semiconductor) serves as a secondary substitute with identical electrical performance except for enhanced DC current gain (200 vs. 135 minimum), which provides improved switching characteristics and reduced base drive requirements. Active product status supports long-term availability. Inventory of 2,000 units accommodates moderate-volume requirements. RoHS compliance status is not specified in available documentation.

Both substitute parts are pin-compatible with the original KSD1616-Y-AP in TO-92-3 package configuration and support direct PCB replacement without layout modification.

Frequently Asked Questions (FAQ)

Q: Can KSD1616AYTA or KSD1616AGTA be used as direct replacements for KSD1616-Y-AP?

A: Yes. Both substitute parts are electrically and mechanically compatible. The KSD1616AYTA and KSD1616AGTA maintain identical collector current (1 A), power dissipation (750 mW), transition frequency (160 MHz), and saturation voltage characteristics. The enhanced 60 V breakdown voltage rating provides additional design margin. TO-92-3 package compatibility enables direct PCB substitution without layout changes.

Q: What is the significance of the 60 V rating on substitute parts versus the 50 V rating on the original?

A: The substitute parts feature a 10 V higher collector-emitter breakdown voltage specification. This enhanced rating provides improved circuit reliability and design margin, particularly in applications approaching the original 50 V limit. The higher voltage rating does not degrade performance in circuits designed for 50 V operation.

Q: How do the DC current gain specifications differ between these parts?

A: The KSD1616-Y-AP and KSD1616AYTA specify a minimum DC current gain (hFE) of 135 at 100 mA collector current and 2 V Vce. The KSD1616AGTA specifies a minimum hFE of 200 under identical bias conditions. Higher current gain reduces base drive requirements and improves switching efficiency, benefiting circuit performance without compromising compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: The KSD1616AYTA is explicitly ROHS3 compliant. The KSD1616AGTA RoHS compliance status is not specified in available technical documentation. Verification with the manufacturer is required for applications with mandatory RoHS compliance requirements.

Q: What packaging formats are available for these substitute parts?

A: The KSD1616AYTA is supplied in Cut Tape (CT) packaging. The KSD1616AGTA is supplied in Bulk packaging. Both parts are available in TO-92-3 through-hole package configuration. Packaging format selection depends on assembly process requirements and volume specifications.

Q: Is the KSD1616-Y-AP still available for procurement?

A: The KSD1616-Y-AP is classified as obsolete. Inventory of 832 units is available from current stock, but long-term availability is not assured. Transition to active substitute parts (KSD1616AYTA or KSD1616AGTA) is recommended for new designs and ongoing production to ensure supply continuity.

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