KSC1507Y Equivalent & Substitute Parts

Part Overview

The KSC1507Y is an NPN bipolar junction transistor manufactured by onsemi, housed in a TO-220-3 through-hole package. This device is rated for 300 V collector-emitter breakdown voltage with a maximum collector current of 200 µA and 15 W power dissipation. The KSC1507Y is classified as obsolete, necessitating identification of active substitute components for new designs and ongoing production requirements. Equivalent parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating the through-hole TO-220 package format.

Key Parameters

Parameter	KSC1507Y	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	300	V
Current - Collector (Ic) (Max)	200	µA
Power - Max	15	W
Frequency - Transition	80	MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	120 @ 10mA, 10V	—
Vce Saturation (Max) @ Ib, Ic	2V @ 5mA, 50mA	V
Operating Temperature (Max)	150	°C
Package / Case	TO-220-3	—
Mounting Type	Through Hole	—

Substitute Part Grouping Explanation

Substitution of the KSC1507Y is determined by the following electrical and mechanical criteria:

Mandatory Compatibility Parameters:

Transistor polarity: NPN configuration required
Package format: TO-220-3 through-hole mounting
Voltage rating: Collector-emitter breakdown voltage must equal or exceed 300 V
Current handling: Collector current rating must accommodate circuit requirements
Power dissipation: Maximum power rating must support thermal load
Operating temperature range: Must include 150°C maximum junction temperature

Substitution Logic: Equivalent parts must maintain NPN polarity and TO-220-3 package compatibility. Substitute devices may exceed the original specifications for voltage, current, power, and frequency ratings without functional degradation. Devices with lower ratings in any critical parameter are not suitable substitutes. Compliance certifications and product status determine suitability for new production versus legacy support applications.

Parameter Comparison

Parameter	KSC1507Y	TIP48G	TIP49	Unit
Transistor Type	NPN	NPN	NPN	—
Voltage - Collector Emitter Breakdown (Max)	300	300	350	V
Current - Collector (Ic) (Max)	200	1000	1000	µA
Power - Max	15	2	40	W
Frequency - Transition	80	10	10	MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	120 @ 10mA, 10V	30 @ 300mA, 10V	30 @ 300mA, 10V	—
Operating Temperature (Max)	150	150	150	°C
Package / Case	TO-220-3	TO-220-3	TO-220-3	—
Mounting Type	Through Hole	Through Hole	Through Hole	—
Product Status	Obsolete	Active	Active	—

Engineering Selection Recommendations

TIP48G (onsemi): The TIP48G is an active product manufactured by onsemi with RoHS3 compliance certification. This device meets or exceeds all mandatory electrical parameters of the KSC1507Y, including voltage rating (300 V), operating temperature (150°C maximum), and TO-220-3 package compatibility. The TIP48G provides 1 A maximum collector current and 2 W power dissipation, representing increased current handling capability. This substitute is suitable for new production designs requiring RoHS compliance and active manufacturer support.

TIP49 (NTE Electronics, Inc): The TIP49 is an active product with enhanced electrical specifications, including 350 V collector-emitter breakdown voltage and 40 W maximum power dissipation. This device accommodates 1 A collector current and maintains TO-220-3 package compatibility and 150°C maximum operating temperature. The TIP49 is classified as RoHS non-compliant and carries unlimited moisture sensitivity level (MSL 1). This substitute provides superior power handling and voltage margin for applications requiring higher thermal capacity or voltage headroom.

Selection Basis:

For RoHS-compliant applications: TIP48G
For maximum power dissipation and voltage margin: TIP49
Both substitutes maintain active product status and full manufacturer support

Frequently Asked Questions (FAQ)

Q: Can the TIP48G directly replace the KSC1507Y in existing designs? A: The TIP48G maintains identical TO-220-3 package pinout and exceeds the KSC1507Y voltage and operating temperature specifications. Pin-for-pin replacement is mechanically and electrically compatible. Verify circuit current requirements do not exceed 1 A maximum collector current.

Q: What is the primary difference between TIP48G and TIP49 substitutes? A: The TIP49 provides higher power dissipation (40 W versus 2 W) and higher collector-emitter breakdown voltage (350 V versus 300 V). The TIP48G offers RoHS3 compliance certification, while the TIP49 is RoHS non-compliant. Current handling capacity is identical at 1 A for both devices.

Q: Is the KSC1507Y still available for purchase? A: The KSC1507Y is classified as obsolete. However, 880 pieces are currently in stock as new original inventory. For ongoing production requirements, transition to active substitute parts TIP48G or TIP49 is recommended.

Q: Do substitute parts require circuit redesign? A: The TO-220-3 package and NPN polarity are identical across all three devices. Circuits designed for the KSC1507Y operate with TIP48G or TIP49 without modification, provided collector current does not exceed 1 A and power dissipation remains within device ratings.

Q: What packaging formats are available for substitute parts? A: TIP48G is supplied in tube packaging. TIP49 is supplied in bag packaging. Both maintain TO-220-3 through-hole format suitable for PCB assembly and breadboard prototyping.

Q: Are there compliance or certification differences between substitutes? A: TIP48G carries RoHS3 compliance certification and REACH unaffected status. TIP49 is RoHS non-compliant but maintains REACH unaffected status. Both devices carry EAR99 export classification. Verify compliance requirements for your specific application before selection.

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