2SB1308-P-TP Equivalent & Substitute Parts

Part Overview

The 2SB1308-P-TP is a Surface Mount PNP Bipolar Junction Transistor manufactured by Micro Commercial Co, designed for general-purpose switching and amplification applications. This device operates at a maximum collector current of 3 A with a collector-emitter breakdown voltage of 20 V and a maximum power dissipation of 500 mW. The transistor is housed in a SOT-89 package and operates across a temperature range of -55°C to 150°C.

The 2SB1308-P-TP is classified as an obsolete product. Locating equivalent or substitute components becomes necessary when original stock is depleted or when design requirements call for enhanced performance characteristics or improved availability. Substitute parts must maintain compatibility with existing circuit designs while meeting or exceeding the electrical and mechanical specifications of the original component.

Substiute Parts

2SB1308-P-TP

Micro Commercial CoIn Stock: 10462SB1308-P-TP Datasheet

Current PartRFQ

FCX789ATA

Diodes IncorporatedIn Stock: 41162FCX789ATA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2SB1308-P-TP is determined by strict adherence to the following electrical and mechanical parameters:

Critical Compatibility Parameters:

• Transistor polarity must be PNP
• Maximum collector current must be equal to or greater than 3 A
• Collector-emitter breakdown voltage must be equal to or greater than 20 V
• Mounting type must be Surface Mount
• Package must be compatible with TO-243AA footprint (SOT-89 family)
• Operating temperature range must encompass -55°C to 150°C
• RoHS3 compliance status must be maintained

The FCX789ATA from Diodes Incorporated satisfies all substitution criteria. This device maintains PNP polarity, supports 3 A collector current, provides 25 V breakdown voltage (exceeding the 20 V requirement), operates across the required temperature range, and is housed in a SOT-89-3 package compatible with TO-243AA footprints. The FCX789ATA is an active product with enhanced electrical performance characteristics and superior availability compared to the obsolete 2SB1308-P-TP.

Parameter Comparison

Engineering Selection Recommendations

The FCX789ATA is a direct substitute for the 2SB1308-P-TP based on the following engineering criteria:

Product Status Consideration: The 2SB1308-P-TP is classified as obsolete, whereas the FCX789ATA is an active product with established supply chain availability. Selection of the FCX789ATA ensures long-term component sourcing and manufacturing continuity.

Compliance and Certification: Both devices maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity ratings, ensuring compatibility with modern manufacturing processes and storage requirements. The FCX789ATA carries REACH Unaffected status, providing additional regulatory assurance.

Electrical Performance: The FCX789ATA meets or exceeds all critical electrical parameters of the 2SB1308-P-TP. The substitute device provides enhanced performance margins including higher breakdown voltage (25 V versus 20 V), improved saturation characteristics (320 mV versus 450 mV), lower collector cutoff current (100 nA versus 500 nA), and increased power dissipation capability (2 W versus 500 mW). The transition frequency is doubled (100 MHz versus 50 MHz), supporting higher-speed applications.

Mechanical Compatibility: Both devices utilize Surface Mount technology with TO-243AA package footprints and SOT-89 family packaging, ensuring direct PCB layout compatibility without redesign requirements.

Frequently Asked Questions (FAQ)

Q: Can the FCX789ATA be used as a direct replacement for the 2SB1308-P-TP without circuit modifications?

A: Yes. The FCX789ATA maintains identical PNP polarity, collector current rating (3 A), operating temperature range (-55°C to 150°C), and Surface Mount SOT-89 package footprint. The substitute device provides equal or superior electrical performance across all critical parameters. No circuit modifications are required for direct substitution.

Q: What are the key differences between the 2SB1308-P-TP and FCX789ATA?

A: The primary differences are product status and performance enhancements. The 2SB1308-P-TP is obsolete; the FCX789ATA is active. The FCX789ATA provides higher breakdown voltage (25 V versus 20 V), improved saturation voltage (320 mV versus 450 mV), lower leakage current (100 nA versus 500 nA), higher power dissipation (2 W versus 500 mW), and doubled transition frequency (100 MHz versus 50 MHz).

Q: Are the package footprints identical between these two devices?

A: Both devices use TO-243AA package designations with SOT-89 family packaging. The FCX789ATA is specified as SOT-89-3, which maintains the same physical footprint and pin configuration as the SOT-89 package of the 2SB1308-P-TP. PCB layouts are directly compatible.

Q: What is the significance of the FCX789ATA being an active product versus the 2SB1308-P-TP being obsolete?

A: Active product status indicates ongoing manufacturing, established supply chain availability, and long-term component sourcing reliability. Obsolete products face declining inventory, potential manufacturing discontinuation, and supply uncertainty. Selection of the active FCX789ATA ensures design sustainability and manufacturing continuity.

Q: Do both devices meet current environmental and regulatory standards?

A: Yes. Both the 2SB1308-P-TP and FCX789ATA are ROHS3 compliant and carry MSL Level 1 (Unlimited) ratings. The FCX789ATA additionally carries REACH Unaffected status, providing comprehensive regulatory compliance for modern manufacturing and distribution environments.

Q: Can the FCX789ATA handle higher current and voltage than the 2SB1308-P-TP?

A: The FCX789ATA maintains the same maximum collector current (3 A) as the 2SB1308-P-TP. However, the FCX789ATA provides higher breakdown voltage (25 V versus 20 V) and significantly higher power dissipation capability (2 W versus 500 mW), allowing operation in higher-power applications within the same current envelope.

Q: Are there any thermal or frequency performance advantages to using the FCX789ATA?

A: Yes. The FCX789ATA provides doubled transition frequency (100 MHz versus 50 MHz), enabling use in higher-speed switching and amplification circuits. The increased power dissipation rating (2 W versus 500 mW) provides improved thermal headroom for sustained operation at elevated currents or ambient temperatures.