2SC1815-O-AP Equivalent & Substitute Parts

Part Overview

The 2SC1815-O-AP is a Bipolar (BJT) NPN transistor manufactured by Micro Commercial Co, rated for 50V collector-emitter breakdown voltage and 150mA maximum collector current. This device is designed for through-hole mounting in the TO-92 package and operates across a temperature range of -55°C to 125°C. The 2SC1815-O-AP is classified as obsolete, making identification of equivalent substitute parts essential for ongoing design support, maintenance, and production continuity. Substitute parts must maintain electrical and mechanical compatibility while offering active product status and reliable supply availability.

Substiute Parts

2SC1815-O-AP

Micro Commercial CoIn Stock: 7722SC1815-O-AP Datasheet

Current PartRFQ

KSC1815YTA

onsemiIn Stock: 57230KSC1815YTA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2SC1815-O-AP is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part must satisfy the following criteria:

Electrical Parameters (Required Match):

• Transistor Type: NPN
• Maximum Collector Current (Ic): 150 mA
• Maximum Collector-Emitter Breakdown Voltage (Vce): 50 V
• Vce Saturation: 250mV @ 10mA, 100mA
• Maximum Collector Cutoff Current (Icbo): 100 nA
• Minimum DC Current Gain (hFE): 70 @ 2mA, 6V
• Maximum Power Dissipation: 400 mW
• Transition Frequency: 80 MHz

Mechanical Parameters (Required Match):

• Mounting Type: Through Hole
• Package / Case: TO-92-3 (TO-226AA) Formed Leads

Compliance Parameters:

• RoHS3 Compliance

The KSC1815YTA meets all specified electrical and mechanical parameters and is classified as an active product with established supply availability.

Parameter Comparison

Engineering Selection Recommendations

The KSC1815YTA is a direct electrical and mechanical equivalent to the 2SC1815-O-AP. Both devices share identical ratings across all critical parameters: collector current, breakdown voltage, saturation characteristics, current gain, power dissipation, and transition frequency. Both are housed in the TO-92-3 package with through-hole mounting and maintain ROHS3 compliance.

The primary advantage of selecting the KSC1815YTA is its active product status. The 2SC1815-O-AP is classified as obsolete, which presents supply chain risk and potential discontinuation. The KSC1815YTA, manufactured by onsemi, is an active product with established supply channels and 57,200 units currently in stock, ensuring long-term availability.

The KSC1815YTA supports an extended maximum operating temperature of 150°C compared to the 2SC1815-O-AP's 125°C upper limit, providing additional thermal margin in applications operating near temperature extremes.

Packaging differs between the two parts: the 2SC1815-O-AP is supplied in bulk format, while the KSC1815YTA is available in cut tape (CT) format. This distinction affects handling and automated assembly processes but does not impact electrical or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the KSC1815YTA be used as a direct replacement for the 2SC1815-O-AP in existing designs?

A: Yes. The KSC1815YTA meets all electrical specifications of the 2SC1815-O-AP, including collector current, breakdown voltage, saturation characteristics, current gain, power rating, and transition frequency. Both devices use the TO-92-3 package with identical pin configuration and through-hole mounting. No circuit modifications are required.

Q: What is the difference in operating temperature range between these parts?

A: The 2SC1815-O-AP operates from -55°C to 125°C. The KSC1815YTA operates up to 150°C maximum junction temperature. The KSC1815YTA provides an extended upper temperature limit of 25°C, which may be beneficial in high-temperature applications but is not required for designs operating within the original part's temperature range.

Q: Are there packaging format differences between these parts?

A: Yes. The 2SC1815-O-AP is supplied in bulk packaging, while the KSC1815YTA is supplied in cut tape (CT) format. Cut tape packaging is standard for automated pick-and-place assembly and reel-based handling. If bulk packaging is required, alternative sourcing or repackaging may be necessary.

Q: Do both parts meet RoHS compliance requirements?

A: Yes. Both the 2SC1815-O-AP and KSC1815YTA are ROHS3 compliant, meeting lead-free and hazardous substance restrictions for electronic components.

Q: Why is the 2SC1815-O-AP classified as obsolete?

A: The 2SC1815-O-AP is no longer in active production by Micro Commercial Co. Obsolete classification indicates the manufacturer has discontinued this product line. The KSC1815YTA, as an active product from onsemi, provides continuity of supply and design support.

Q: Are the DC current gain specifications identical between these parts?

A: Yes. Both parts specify a minimum DC current gain (hFE) of 70 measured at 2mA collector current and 6V collector-emitter voltage. This parameter is critical for biasing calculations and circuit design and is fully equivalent between the two devices.

Q: Can the KSC1815YTA handle the same power dissipation as the 2SC1815-O-AP?

A: Yes. Both parts are rated for a maximum power dissipation of 400 mW. Thermal management and PCB layout considerations remain identical between the two devices.