SS8050-C-BP Equivalent & Substitute Parts Reference

Part Overview

The SS8050-C-BP is an NPN bipolar junction transistor manufactured by Micro Commercial Co, rated for 25V collector-emitter breakdown voltage and 1.5A maximum collector current. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design support and procurement continuity. Substitute parts must maintain electrical and mechanical compatibility within the specified parameter ranges to ensure functional equivalence in circuit applications.

Substiute Parts

SS8050-C-BP

Micro Commercial CoIn Stock: 1011SS8050-C-BP Datasheet

Current PartRFQ

SS8050CBU

onsemiIn Stock: 126356SS8050CBU Datasheet

MFR RecommendedRFQ

SS8050DBU

Fairchild SemiconductorIn Stock: 126465SS8050DBU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SS8050-C-BP is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Transistor Type: NPN (required match)
• Current - Collector (Ic) Max: 1.5 A (required match)
• Voltage - Collector Emitter Breakdown (Max): 25 V (required match)
• Vce Saturation (Max): 500mV @ 80mA, 800mA (required match)
• Current - Collector Cutoff (Max): 100 nA (required match)
• DC Current Gain (hFE) Min: ≥120 @ 100mA, 1V (minimum threshold)
• Power - Max: 1 W (required match)

Mechanical Equivalence Criteria:

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

Environmental Criteria:

• Operating Temperature Range: -55°C to 150°C (TJ) (required match or superior range)

Both identified substitute parts (SS8050CBU and SS8050DBU) satisfy all electrical and mechanical equivalence criteria. Differences in transition frequency (190MHz vs. 100MHz) and product status do not preclude substitution, as these parameters fall outside the mandatory equivalence set for this component category.

Parameter Comparison

Engineering Selection Recommendations

SS8050CBU (onsemi): This substitute part is manufactured by onsemi and carries active product status. It maintains full electrical and mechanical equivalence to the SS8050-C-BP across all critical parameters. The component is ROHS3 compliant and REACH unaffected, meeting current environmental regulatory requirements. Transition frequency is reduced to 100MHz compared to the original 190MHz specification; this difference is acceptable for applications not requiring the higher frequency performance of the original part.

SS8050DBU (Fairchild Semiconductor): This substitute part is manufactured by Fairchild Semiconductor and carries active product status. It maintains full electrical and mechanical equivalence to the SS8050-C-BP. The DC Current Gain (hFE) minimum specification is 160 @ 100mA, 1V, which exceeds the original 120 minimum requirement, providing superior current amplification characteristics. Transition frequency is 100MHz, consistent with SS8050CBU.

Both substitute parts are suitable for direct replacement in applications where the SS8050-C-BP is specified, provided that the reduced transition frequency (100MHz vs. 190MHz) does not conflict with circuit timing or frequency response requirements.

Frequently Asked Questions (FAQ)

Q: Can SS8050CBU or SS8050DBU be used as direct replacements for SS8050-C-BP?

A: Yes. Both substitute parts satisfy all mandatory electrical and mechanical equivalence criteria: NPN type, 1.5A collector current, 25V breakdown voltage, identical saturation characteristics, matching cutoff current, minimum hFE of 120 or greater, 1W power rating, through-hole mounting, and TO-92-3 package. Pin configuration and lead spacing are identical.

Q: What is the significance of the transition frequency difference (190MHz vs. 100MHz)?

A: Transition frequency (fT) indicates the frequency at which current gain drops to unity. The original SS8050-C-BP operates at 190MHz, while both substitutes operate at 100MHz. For DC and low-frequency switching applications, this difference is not functionally significant. For high-frequency signal amplification or switching applications approaching or exceeding 100MHz, circuit performance must be evaluated against the reduced transition frequency specification.

Q: Are there differences in DC current gain between the substitute parts?

A: SS8050CBU specifies a minimum hFE of 120 @ 100mA, 1V, matching the original part. SS8050DBU specifies a minimum hFE of 160 @ 100mA, 1V, which is higher. Both meet or exceed the original requirement. Higher hFE in SS8050DBU may result in slightly different biasing behavior in circuits with fixed base resistor networks; circuit verification is recommended if precise gain matching is critical.

Q: What is the difference between the operating temperature ranges?

A: The original SS8050-C-BP specifies -55°C to 150°C (TJ). SS8050CBU and SS8050DBU specify 150°C (TJ) maximum only, without explicit lower temperature specification. For applications requiring operation below 0°C, the original part's extended lower temperature range should be confirmed with the substitute manufacturer's detailed datasheet.

Q: Are the substitute parts RoHS compliant?

A: SS8050CBU is ROHS3 compliant and REACH unaffected. SS8050DBU compliance status is not specified in the provided data. For applications requiring documented RoHS or REACH compliance, SS8050CBU is the recommended choice, or SS8050DBU compliance should be verified with Fairchild Semiconductor documentation.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. All three parts use identical TO-92-3 (TO-226AA) package geometry with three leads in the same physical configuration. No PCB layout modifications are required for substitution.