2SC5343-O-AP Equivalent & Substitute Parts

Part Overview

The 2SC5343-O-AP is an NPN bipolar junction transistor manufactured by Micro Commercial Co, designed for general-purpose switching and amplification applications. This device features a 50 V collector-emitter breakdown voltage rating and supports collector currents up to 150 mA, with a maximum power dissipation of 625 mW in a Through Hole TO-92 package.

The 2SC5343-O-AP is classified as an obsolete product. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability for production, and support long-term system maintenance where original components are no longer readily procurable.

Substiute Parts

2SC5343-O-AP

Micro Commercial CoIn Stock: 11322SC5343-O-AP Datasheet

Current PartRFQ

KSC1815YTA

onsemiIn Stock: 57230KSC1815YTA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2SC5343-O-AP is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Transistor type must be NPN
• Voltage - Collector Emitter Breakdown (Max) must equal or exceed 50 V
• Current - Collector (Ic) (Max) must equal or exceed 150 mA
• Vce Saturation (Max) @ Ib, Ic must match 250mV @ 10mA, 100mA
• Current - Collector Cutoff (Max) must not exceed 100nA (ICBO)
• DC Current Gain (hFE) (Min) must meet or exceed 70 @ specified conditions
• Frequency - Transition must equal or exceed 80 MHz
• Operating Temperature (TJ) must support 150°C

Mechanical Equivalence Criteria:

• Mounting type must be Through Hole
• Package / Case must be TO-92-3 or equivalent TO-226-3 configuration

The KSC1815YTA meets all specified electrical and mechanical parameters and qualifies as a direct substitute for the 2SC5343-O-AP.

Parameter Comparison

Engineering Selection Recommendations

The KSC1815YTA manufactured by onsemi is a qualified direct substitute for the obsolete 2SC5343-O-AP. Both devices share identical electrical specifications across all critical parameters including voltage rating, current capacity, saturation characteristics, and frequency response. Both components maintain ROHS3 compliance.

The primary distinction is product status: the 2SC5343-O-AP is obsolete, while the KSC1815YTA is an active product with confirmed inventory availability (57,200 pieces in stock). The KSC1815YTA is supplied in Cut Tape (CT) packaging format, whereas the original part was supplied in standard packaging.

The KSC1815YTA exhibits a lower maximum power dissipation rating (400 mW versus 625 mW). Applications requiring the full 625 mW power budget must evaluate whether the 400 mW rating of the substitute is sufficient for the intended circuit design. In applications where power dissipation remains below 400 mW, the KSC1815YTA provides direct functional equivalence.

Both devices are ROHS3 compliant and suitable for applications requiring environmental compliance. The KSC1815YTA carries REACH Unaffected status, confirming regulatory compliance for European markets.

Frequently Asked Questions (FAQ)

Q: Can the KSC1815YTA be used as a direct replacement for the 2SC5343-O-AP in existing designs?

A: The KSC1815YTA is electrically and mechanically equivalent to the 2SC5343-O-AP across all specified parameters. Pin configuration, package type (TO-92-3), and electrical characteristics are identical. Direct substitution is possible in applications where power dissipation does not exceed 400 mW.

Q: What is the significance of the power rating difference between these parts?

A: The 2SC5343-O-AP is rated for 625 mW maximum power dissipation, while the KSC1815YTA is rated for 400 mW. This difference reflects the thermal design of each device. Applications operating below 400 mW experience no functional impact. Designs requiring sustained operation above 400 mW must be re-evaluated for thermal management or alternative component selection.

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

A: Both devices specify a minimum DC current gain (hFE) of 70. The 2SC5343-O-AP specifies this gain at 2A and 6V, while the KSC1815YTA specifies it at 2mA and 6V. The minimum gain value is equivalent; the measurement conditions differ. For practical circuit design, both devices deliver the specified minimum gain performance.

Q: What packaging formats are available for the KSC1815YTA?

A: The KSC1815YTA is supplied in Cut Tape (CT) format. The 2SC5343-O-AP was supplied in standard packaging. Both devices use the TO-92-3 package configuration with identical lead geometry and spacing, ensuring mechanical compatibility in Through Hole applications.

Q: Are both parts compliant with environmental regulations?

A: Yes. Both the 2SC5343-O-AP and KSC1815YTA are ROHS3 compliant. The KSC1815YTA additionally carries REACH Unaffected status, confirming compliance with European chemical regulations. Both devices are suitable for applications requiring environmental compliance certification.

Q: Why is the 2SC5343-O-AP classified as obsolete?

A: The 2SC5343-O-AP is no longer manufactured or actively supported by Micro Commercial Co. The KSC1815YTA, manufactured by onsemi, provides equivalent functionality and is actively produced with confirmed inventory availability, making it the recommended choice for new designs and component replenishment.