2SA965-O,F(J Equivalent & Substitute Parts

Part Overview

The 2SA965-O,F(J is a PNP bipolar junction transistor manufactured by Toshiba Semiconductor and Storage, designed for general-purpose switching and amplification applications. This component operates at 120V collector-emitter breakdown voltage with a maximum collector current of 800mA and delivers 900mW power dissipation in a through-hole TO-92MOD package. The part is classified as obsolete, necessitating identification of active substitute components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Voltage - Collector Emitter Breakdown (Max)	120	V
Current - Collector (Ic) (Max)	800	mA
Power - Max	900	mW
Frequency - Transition	120	MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	80 @ 100mA, 5V	—
Vce Saturation (Max) @ Ib, Ic	1V @ 50mA, 500mA	—
Current - Collector Cutoff (Max)	100	nA
Operating Temperature (TJ)	150	°C
Mounting Type	Through Hole	—

Substitute Part Grouping Explanation

Substitution of the 2SA965-O,F(J is determined by strict equivalence across the following electrical parameters: PNP transistor type, 120V collector-emitter breakdown voltage, 800mA maximum collector current, 120MHz transition frequency, 80 minimum DC current gain at specified conditions, 1V maximum saturation voltage at specified bias conditions, and 100nA maximum collector cutoff current. The 2SA1201-Y(TE12L,ZC meets all electrical specifications identically. However, this substitute introduces a critical mechanical difference: the 2SA1201-Y(TE12L,ZC utilizes surface-mount packaging (PW-MINI, TO-243AA) versus the through-hole TO-92MOD package of the original part. This packaging distinction requires circuit board redesign and assembly process modification. Additionally, the 2SA1201-Y(TE12L,ZC is rated for 500mW maximum power dissipation compared to 900mW for the 2SA965-O,F(J, representing a 44% reduction in thermal capability. The substitute part carries active product status and RoHS3 compliance certification, whereas the original is obsolete.

Parameter Comparison

Parameter	2SA965-O,F(J	2SA1201-Y(TE12L,ZC	Match Status
Transistor Type	PNP	PNP	Equivalent
Voltage - Collector Emitter Breakdown (Max)	120V	120V	Equivalent
Current - Collector (Ic) (Max)	800mA	800mA	Equivalent
Power - Max	900mW	500mW	Substitute Reduced
Frequency - Transition	120MHz	120MHz	Equivalent
DC Current Gain (hFE) (Min) @ Ic, Vce	80 @ 100mA, 5V	80 @ 100mA, 5V	Equivalent
Vce Saturation (Max) @ Ib, Ic	1V @ 50mA, 500mA	1V @ 50mA, 500mA	Equivalent
Current - Collector Cutoff (Max)	100nA	100nA	Equivalent
Operating Temperature (TJ)	150°C	150°C	Equivalent
Mounting Type	Through Hole	Surface Mount	Different
Package / Case	TO-92MOD	PW-MINI (TO-243AA)	Different
Product Status	Obsolete	Active	Substitute Active

Engineering Selection Recommendations

The 2SA1201-Y(TE12L,ZC provides electrical equivalence to the 2SA965-O,F(J across all core transistor specifications. Selection of this substitute is appropriate for new designs and applications where thermal dissipation does not exceed 500mW. The substitute part carries active product status, ensuring long-term availability and supply chain continuity. RoHS3 compliance of the 2SA1201-Y(TE12L,ZC aligns with current environmental and regulatory standards.

For applications requiring the full 900mW power dissipation capability of the original 2SA965-O,F(J, the reduced power rating of the 2SA1201-Y(TE12L,ZC necessitates thermal analysis to confirm adequate heat dissipation within the lower specification. Through-hole mounting applications require circuit board redesign to accommodate the surface-mount PW-MINI package of the substitute, including modification of PCB footprints, trace routing, and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the 2SA1201-Y(TE12L,ZC directly replace the 2SA965-O,F(J in existing through-hole circuit boards?

A: No. The 2SA1201-Y(TE12L,ZC uses surface-mount packaging (PW-MINI) while the 2SA965-O,F(J uses through-hole TO-92MOD packaging. Circuit board redesign is required to accommodate the different footprint and mounting method.

Q: Are the electrical characteristics identical between these two parts?

A: Electrical characteristics are equivalent for transistor type, voltage rating, collector current, frequency response, current gain, saturation voltage, and cutoff current. The maximum power dissipation differs: 900mW for the 2SA965-O,F(J versus 500mW for the 2SA1201-Y(TE12L,ZC.

Q: What is the significance of the product status difference?

A: The 2SA965-O,F(J is classified as obsolete, indicating discontinued manufacturing and limited availability. The 2SA1201-Y(TE12L,ZC is active, ensuring ongoing production and reliable supply for future procurement.

Q: Does the 2SA1201-Y(TE12L,ZC meet current environmental compliance standards?

A: Yes. The 2SA1201-Y(TE12L,ZC carries RoHS3 compliance certification, meeting current environmental and regulatory requirements for electronic components.

Q: What thermal considerations apply when substituting the 2SA1201-Y(TE12L,ZC?

A: The substitute part is rated for 500mW maximum power dissipation, representing a 44% reduction from the original 900mW rating. Applications dissipating power near or exceeding 500mW require thermal analysis to confirm adequate heat dissipation within the lower specification.

Q: Are the DC current gain and saturation voltage specifications identical?

A: Yes. Both parts specify 80 minimum DC current gain at 100mA collector current and 5V collector-emitter voltage, and 1V maximum saturation voltage at 50mA base current and 500mA collector current.

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