BC558CTA Equivalent & Substitute Parts

Part Overview

The BC558CTA is a PNP bipolar junction transistor manufactured by onsemi, designed for general-purpose switching and amplification applications. This device features a maximum collector current of 100 mA, collector-emitter breakdown voltage of 30 V, and maximum power dissipation of 500 mW in a Through Hole TO-92-3 package. The BC558CTA is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

Substiute Parts

BC558CTA

onsemiIn Stock: 997BC558CTA Datasheet

Current PartRFQ

BC559CTA

onsemiIn Stock: 70031BC559CTA Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BC558CTA is determined by electrical and mechanical parameter equivalence. The BC559CTA qualifies as a parametric equivalent based on the following criteria:

Electrical Parameters (Must Match):

• Transistor Type: PNP
• Current - Collector (Ic) (Max): 100 mA
• Voltage - Collector Emitter Breakdown (Max): 30 V
• Vce Saturation (Max) @ Ib, Ic: 650 mV @ 5 mA, 100 mA
• Current - Collector Cutoff (Max): 15 nA (ICBO)
• DC Current Gain (hFE) (Min) @ Ic, Vce: 420 @ 2 mA, 5 V
• Power - Max: 500 mW
• Frequency - Transition: 150 MHz
• Operating Temperature (TJ): 150°C

Mechanical Parameters (Must Match):

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

The BC559CTA maintains identical electrical and mechanical specifications to the BC558CTA, enabling direct substitution in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The BC559CTA is the direct parametric equivalent for the BC558CTA. Selection of the BC559CTA is supported by the following factors:

Product Status: The BC559CTA maintains Active product status, ensuring ongoing availability and manufacturing support. The BC558CTA is classified as Obsolete, necessitating transition to an active equivalent.

Compliance and Certifications: Both parts maintain identical REACH status (REACH Unaffected), ECCN classification (EAR99), and HTSUS code (8541.21.0075). The BC559CTA is RoHS3 Compliant, providing additional regulatory alignment for new designs.

Electrical and Mechanical Equivalence: All critical electrical parameters and mechanical specifications are identical between the two parts, enabling direct substitution without circuit modification.

Packaging: Both parts utilize the same Through Hole TO-92-3 package with formed leads, ensuring mechanical compatibility in existing PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the BC559CTA be used as a direct replacement for the BC558CTA?

A: Yes. The BC559CTA is a parametric equivalent with identical electrical specifications and mechanical package. Direct substitution is supported without circuit modification.

Q: What is the primary difference between the BC558CTA and BC559CTA?

A: The BC558CTA is classified as Obsolete, while the BC559CTA maintains Active product status. All electrical and mechanical parameters are identical.

Q: Are there any compliance differences between these parts?

A: Both parts maintain identical REACH status, ECCN classification, and HTSUS codes. The BC559CTA is RoHS3 Compliant, providing enhanced regulatory compliance for new designs.

Q: Will the BC559CTA fit the same PCB footprint as the BC558CTA?

A: Yes. Both parts use the Through Hole TO-92-3 package with formed leads, ensuring identical mechanical compatibility.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution is determined by matching Transistor Type (PNP), maximum collector current (100 mA), collector-emitter breakdown voltage (30 V), saturation voltage, cutoff current, DC current gain, maximum power dissipation (500 mW), transition frequency (150 MHz), and operating temperature (150°C).

Q: Is the BC559CTA available in the same packaging options?

A: The BC559CTA is supplied in Cut Tape (CT) packaging. Both parts use the TO-92-3 package configuration with formed leads suitable for Through Hole mounting.