S9014-C-AP Equivalent & Substitute Parts

Part Overview

The S9014-C-AP is a Bipolar (BJT) NPN transistor manufactured by Micro Commercial Co, rated for 45V collector-emitter breakdown voltage and 100mA maximum collector current. This device is packaged in TO-92 through-hole configuration and is classified as Obsolete product status. Due to its obsolete classification and limited availability relative to active alternatives, identification of functionally equivalent substitute parts is necessary for ongoing design support and production continuity.

Substiute Parts

S9014-C-AP

Micro Commercial CoIn Stock: 996S9014-C-AP Datasheet

Current PartRFQ

BC550CTA

onsemiIn Stock: 13803BC550CTA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the S9014-C-AP is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Transistor Type: NPN (identical polarity required)
• Voltage - Collector Emitter Breakdown (Max): 45V (minimum threshold)
• Current - Collector (Ic) (Max): 100mA (minimum threshold)
• Power - Max: 400mW (minimum threshold)
• Operating Temperature Range: Must encompass or exceed -55°C to 150°C

Mechanical Equivalence Criteria:

• Mounting Type: Through Hole
• Package / Case: TO-92-3 (physical and pin compatibility)

Compliance Criteria:

• RoHS Status: RoHS Compliant or equivalent environmental standard

The BC550CTA meets all substitution criteria. It maintains identical NPN polarity, voltage rating, and current rating while exceeding power dissipation capability and operating temperature specification. Physical packaging is identical TO-92-3 through-hole configuration, ensuring direct mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The S9014-C-AP is classified as Obsolete, while the BC550CTA is classified as Active. Active product status ensures ongoing manufacturing support, documented supply chain availability (13,720 pcs in stock versus 925 pcs), and continued technical documentation updates.

Compliance and Certification: Both parts maintain RoHS compliance. The BC550CTA carries ROHS3 Compliant designation and REACH Unaffected status, representing current environmental regulatory alignment. The S9014-C-AP carries RoHS Compliant status without REACH documentation.

Performance Margin: The BC550CTA provides performance margins across power dissipation (500mW vs. 400mW), transition frequency (300MHz vs. 150MHz), and DC current gain (420 vs. 200), while maintaining identical voltage and current ratings. These margins do not alter circuit behavior in applications designed for S9014-C-AP specifications but provide design robustness.

Direct Substitution Feasibility: The BC550CTA is a direct substitute for the S9014-C-AP in through-hole PCB applications. Identical TO-92-3 packaging permits direct socket replacement without PCB modification. No circuit redesign is required.

Frequently Asked Questions (FAQ)

Q: Can BC550CTA replace S9014-C-AP in existing designs without modification?

A: Yes. The BC550CTA is electrically and mechanically equivalent to the S9014-C-AP. Identical NPN polarity, voltage rating (45V), current rating (100mA), and TO-92-3 package configuration permit direct substitution. No circuit redesign or PCB layout changes are required.

Q: What are the key differences between these parts?

A: The BC550CTA exceeds the S9014-C-AP in three performance parameters: power dissipation (500mW vs. 400mW), transition frequency (300MHz vs. 150MHz), and DC current gain (420 vs. 200 @ specified test conditions). These differences represent performance margins that do not affect compatibility in applications designed for S9014-C-AP specifications.

Q: Why is the BC550CTA recommended over the S9014-C-AP?

A: The S9014-C-AP is classified as Obsolete product status with limited inventory (925 pcs). The BC550CTA is classified as Active with significantly higher availability (13,720 pcs in stock). Active product status ensures continued manufacturing support and supply chain reliability. Both parts maintain RoHS compliance; the BC550CTA carries current ROHS3 certification.

Q: Are there any temperature range limitations with the BC550CTA?

A: The BC550CTA is rated to 150°C maximum junction temperature, matching the upper limit of the S9014-C-AP operating range (-55°C to 150°C). The BC550CTA does not specify a minimum operating temperature in the provided data; applications requiring operation below -55°C should reference the BC550CTA datasheet for low-temperature performance confirmation.

Q: Is the TO-92-3 package identical between both parts?

A: Yes. Both the S9014-C-AP and BC550CTA use TO-92-3 (TO-226AA) formed leads through-hole package configuration. Pin assignment, lead spacing, and mechanical dimensions are identical, permitting direct socket replacement on existing PCBs.

Q: What is the impact of higher DC current gain in the BC550CTA?

A: The BC550CTA exhibits higher DC current gain (hFE = 420 @ 2mA, 5V) compared to the S9014-C-AP (hFE = 200 @ 1mA, 5V). In applications where the transistor operates in saturation or cutoff regions, this difference has minimal impact. In linear amplification circuits, higher current gain may reduce base drive requirements but does not alter circuit functionality if the original design provided adequate base current margin.

Q: Are both parts suitable for high-frequency applications?

A: The BC550CTA (300MHz transition frequency) is suitable for higher-frequency applications than the S9014-C-AP (150MHz transition frequency). Applications operating below 150MHz are compatible with both parts. Applications requiring operation between 150MHz and 300MHz require the BC550CTA.