KSC2752OS Equivalent & Substitute Parts

Part Overview

The KSC2752OS is an NPN bipolar junction transistor manufactured by onsemi, rated for 400 V collector-emitter breakdown voltage and 500 mA maximum collector current in a TO-126-3 through-hole package. This device is classified as obsolete, which necessitates identification of active equivalent parts for new designs and ongoing production requirements. The KSC2752OS remains available in limited inventory (691 pieces), but active alternatives ensure long-term supply chain continuity and design flexibility.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	400	V
Current - Collector (Ic) (Max)	500	mA
Power - Max	1	W
Vce Saturation (Max) @ Ib, Ic	1 V @ 60 mA, 300 mA	—
Current - Collector Cutoff (Max)	10	µA
DC Current Gain (hFE) (Min) @ Ic, Vce	30 @ 50 mA, 5 V	—
Operating Temperature (TJ)	150	°C
Mounting Type	Through Hole	—
Package / Case	TO-225AA, TO-126-3	—

Substitute Part Grouping Explanation

Substitution of the KSC2752OS is determined by electrical and mechanical parameter equivalence across the following criteria:

Electrical Parameters (Critical for Functional Equivalence):

Transistor polarity: NPN
Voltage rating: 400 V collector-emitter breakdown minimum
Current rating: 500 mA collector current minimum
Power dissipation: 1 W minimum
Saturation voltage: 1 V maximum at specified bias conditions
Leakage current: 10 µA maximum (ICBO)
DC current gain: 30 minimum at specified operating point

Mechanical Parameters (Critical for Physical Compatibility):

Mounting type: Through-hole configuration
Package designation: TO-126-3 or equivalent TO-225AA footprint
Operating temperature range: 150 °C maximum junction temperature

The KSC2752OSTU meets all electrical and mechanical requirements for direct substitution with the KSC2752OS. Both devices share identical base product designation (KSC2752) and are manufactured by onsemi.

Parameter Comparison

Parameter	KSC2752OS	KSC2752OSTU	Match
Manufacturer	onsemi	onsemi	Yes
Transistor Type	NPN	NPN	Yes
Voltage - Collector Emitter Breakdown (Max)	400 V	400 V	Yes
Current - Collector (Ic) (Max)	500 mA	500 mA	Yes
Power - Max	1 W	1 W	Yes
Vce Saturation (Max) @ Ib, Ic	1 V @ 60 mA, 300 mA	1 V @ 60 mA, 300 mA	Yes
Current - Collector Cutoff (Max)	10 µA	10 µA	Yes
DC Current Gain (hFE) (Min) @ Ic, Vce	30 @ 50 mA, 5 V	30 @ 50 mA, 5 V	Yes
Operating Temperature (TJ)	150 °C	150 °C	Yes
Mounting Type	Through Hole	Through Hole	Yes
Package / Case	TO-225AA, TO-126-3	TO-225AA, TO-126-3	Yes
Product Status	Obsolete	Active	Functional Upgrade

Engineering Selection Recommendations

KSC2752OSTU is the direct substitute for KSC2752OS applications. Selection rationale is based on the following factors:

Product Status: The KSC2752OSTU carries Active product status, ensuring ongoing manufacturer support, availability, and compliance with current industry standards. The KSC2752OS is classified as Obsolete, presenting supply chain risk for future production and design revisions.

Compliance and Certifications: The KSC2752OSTU is RoHS3 Compliant, meeting current environmental and hazardous substance restrictions. Both parts maintain REACH Unaffected status and EAR99 export classification. The KSC2752OSTU does not carry moisture sensitivity level restrictions (Not Applicable), compared to MSL 1 for the KSC2752OS.

Electrical and Mechanical Equivalence: All critical electrical parameters—voltage rating, current rating, power dissipation, saturation characteristics, leakage current, and DC current gain—are identical between the two devices. Mechanical compatibility is confirmed through identical package designation (TO-126-3) and through-hole mounting configuration.

Inventory Availability: The KSC2752OSTU maintains significantly higher inventory levels (25,100 pieces) compared to the KSC2752OS (691 pieces), supporting sustained production and design flexibility.

Frequently Asked Questions (FAQ)

Q: Can KSC2752OSTU be used as a direct replacement for KSC2752OS in existing designs?

A: Yes. The KSC2752OSTU is electrically and mechanically equivalent to the KSC2752OS. All electrical parameters—voltage rating, current rating, power dissipation, saturation voltage, leakage current, and DC current gain—are identical. Both devices use the TO-126-3 through-hole package with identical pinout and footprint compatibility.

Q: What is the primary difference between KSC2752OS and KSC2752OSTU?

A: The primary difference is product status and packaging format. The KSC2752OS is classified as Obsolete and supplied in standard packaging, while the KSC2752OSTU is Active and supplied in tube packaging. The KSC2752OSTU also carries RoHS3 Compliance certification and does not have moisture sensitivity level restrictions.

Q: Are there any thermal or operating condition differences between these parts?

A: No. Both devices have identical maximum junction temperature ratings (150 °C) and identical electrical operating characteristics across all specified parameters.

Q: What packaging format is supplied with each part number?

A: The KSC2752OS is supplied in standard packaging. The KSC2752OSTU is supplied in tube packaging, which is suitable for automated assembly processes and high-volume production environments.

Q: Is the KSC2752OSTU suitable for new design implementations?

A: Yes. The KSC2752OSTU carries Active product status and RoHS3 Compliance, making it suitable for new designs requiring current environmental and regulatory compliance standards.

Q: Are there any pin configuration or footprint differences between KSC2752OS and KSC2752OSTU?

A: No. Both devices use the TO-126-3 package with identical pin configuration and PCB footprint. Direct board-level substitution is supported without layout modifications.

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