S9015-D-AP Equivalent & Substitute Parts

Part Overview

The S9015-D-AP is a PNP bipolar junction transistor manufactured by Micro Commercial Co, rated for 45 V collector-emitter breakdown voltage and 100 mA maximum collector current. This device is packaged in a TO-92 through-hole configuration and is classified as obsolete. Due to its obsolete status, equivalent substitute parts from active manufacturers are necessary to maintain design continuity and ensure long-term component availability for new production and field replacements.

Substiute Parts

S9015-D-AP

Micro Commercial CoIn Stock: 941S9015-D-AP Datasheet

Current PartRFQ

BC557ATA

Fairchild SemiconductorIn Stock: 860BC557ATA Datasheet

DirectRFQ

BC557BTA

onsemiIn Stock: 6210BC557BTA Datasheet

DirectRFQ

BC557BTF

onsemiIn Stock: 41658BC557BTF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the S9015-D-AP are qualified based on the following electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Transistor Type: PNP (identical)
• Current - Collector (Ic) (Max): 100 mA (identical)
• Voltage - Collector Emitter Breakdown (Max): 45 V (identical)
• Frequency - Transition: 150 MHz (identical)
• Mounting Type: Through Hole (identical)
• Package / Case: TO-92-3 (TO-226AA) Formed Leads (identical)

Acceptable Parameter Variations:

• Power - Max: Substitute parts rated at 500 mW exceed the 450 mW requirement and are acceptable
• Operating Temperature: Substitute parts rated to 150°C meet or exceed the -55°C to 150°C range
• Vce Saturation and DC Current Gain: Variations within these parameters do not preclude substitution when primary electrical ratings are matched

All three substitute parts (BC557ATA, BC557BTA, BC557BTF) meet these criteria and are direct functional equivalents.

Parameter Comparison

Engineering Selection Recommendations

BC557BTF (onsemi) is the primary substitute for the S9015-D-AP. This part is manufactured by onsemi, carries Active product status, and maintains ROHS3 compliance. The BC557BTF is available in high inventory (41,626 pcs) and is supplied in Cut Tape packaging. All electrical parameters match the S9015-D-AP requirements, with power dissipation rated at 500 mW, exceeding the original 450 mW specification.

BC557BTA (onsemi) is an equivalent alternative, also from onsemi with Active status and ROHS3 compliance. This part differs from BC557BTF only in packaging format (Cut Tape) and has substantial inventory availability (6,200 pcs). Electrical specifications are identical to BC557BTF.

BC557ATA (Fairchild Semiconductor) is a functional equivalent with Active product status. This part is manufactured by Fairchild Semiconductor and meets all electrical requirements. Inventory availability is 779 pcs. The DC Current Gain specification (110 @ 2mA, 5V) is lower than the other substitutes, which may be a consideration in gain-sensitive applications, though it remains within acceptable operating parameters for most general-purpose PNP switching applications.

All three substitute parts are ROHS3 compliant and carry the same ECCN and HTSUS classifications as the original part.

Frequently Asked Questions (FAQ)

Q: Can the BC557BTF directly replace the S9015-D-AP in existing designs?

A: Yes. The BC557BTF is a direct functional equivalent. Both devices are PNP transistors with identical maximum collector current (100 mA), collector-emitter breakdown voltage (45 V), transition frequency (150 MHz), and TO-92-3 package configuration. The BC557BTF power rating of 500 mW exceeds the S9015-D-AP specification of 450 mW, providing additional thermal margin.

Q: What is the difference between BC557BTF and BC557BTA?

A: BC557BTF and BC557BTA are electrically identical. The primary difference is packaging format: BC557BTF is supplied in Cut Tape, while BC557BTA is also supplied in Cut Tape. Both are manufactured by onsemi and carry identical electrical specifications. Selection between these parts depends on procurement and assembly requirements rather than electrical performance.

Q: Why does the BC557ATA have a lower DC Current Gain specification?

A: The BC557ATA is specified with a minimum DC Current Gain of 110 @ 2mA, 5V, compared to 200 @ 2mA, 5V for BC557BTA and BC557BTF. This reflects manufacturing variations between Fairchild Semiconductor and onsemi. For applications requiring higher current gain, BC557BTA or BC557BTF are preferred. For general-purpose switching applications, the BC557ATA remains functionally adequate.

Q: Are all substitute parts RoHS compliant?

A: BC557BTA and BC557BTF are explicitly ROHS3 compliant. BC557ATA RoHS status is not specified in the provided data. For applications requiring RoHS certification, BC557BTA or BC557BTF are recommended.

Q: Can these parts be used in high-temperature applications?

A: All substitute parts are rated to 150°C junction temperature. The original S9015-D-AP is rated from -55°C to 150°C. If the application requires operation below -55°C, the substitute parts may not be suitable. For standard industrial temperature ranges (-40°C to 85°C or -55°C to 125°C), all substitute parts are acceptable.

Q: What is the package compatibility between S9015-D-AP and the substitute parts?

A: All parts use the TO-92-3 (TO-226AA) package with formed leads. Physical dimensions and pin configurations are identical, ensuring direct mechanical compatibility in through-hole PCB applications without layout modifications.