2SA1797-P-AP Equivalent & Substitute Parts

Part Overview

The 2SA1797-P-AP is a PNP bipolar junction transistor manufactured by Micro Commercial Co, rated for 50V collector-emitter breakdown voltage and 2A maximum collector current. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The device is housed in a SOT-89 surface mount package and complies with RoHS3 standards.

Substiute Parts

2SA1797-P-AP

Micro Commercial CoIn Stock: 6892SA1797-P-AP Datasheet

Current PartRFQ

2DA1797-13

Diodes IncorporatedIn Stock: 479672DA1797-13 Datasheet

DirectRFQ

2SB1123S-TD-E

onsemiIn Stock: 132982SB1123S-TD-E Datasheet

SimilarRFQ

2SB1123T-TD-E

onsemiIn Stock: 254872SB1123T-TD-E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2SA1797-P-AP is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Transistor type must be PNP
• Voltage - Collector Emitter Breakdown rating must be 50V or greater
• Current - Collector (Ic) maximum rating must be 2A or greater
• Power dissipation must be 500mW or greater
• Package / Case must be TO-243AA
• Mounting type must be Surface Mount

Compliance Criteria:

• RoHS3 compliance required
• Moisture Sensitivity Level (MSL) of 1 (Unlimited)

The substitute parts identified meet these criteria while maintaining functional equivalence for the 2SA1797-P-AP in circuit applications requiring PNP transistor operation within the specified electrical envelope.

Parameter Comparison

Engineering Selection Recommendations

2DA1797-13 (Diodes Incorporated)

The 2DA1797-13 is a direct functional equivalent with active product status. This part exceeds the electrical requirements of the 2SA1797-P-AP with a maximum collector current rating of 3A and power dissipation of 900mW, providing design margin for the 2A, 500mW specification. The Vce saturation characteristic matches the original part at 350mV, ensuring equivalent switching performance. RoHS3 compliance and MSL-1 rating confirm environmental and handling compatibility. The SOT-89-3 package maintains mechanical compatibility with TO-243AA footprints.

2SB1123S-TD-E (onsemi)

The 2SB1123S-TD-E is an active substitute with equivalent electrical ratings for collector current (2A) and power dissipation (500mW). This part maintains the 50V breakdown voltage specification. The elevated Vce saturation of 700mV represents a functional difference in switching characteristics compared to the original 350mV specification. RoHS3 compliance and MSL-1 rating confirm regulatory and handling compatibility. The PCP package maintains TO-243AA mechanical compatibility.

2SB1123T-TD-E (onsemi)

The 2SB1123T-TD-E is an active substitute with equivalent electrical ratings for collector current (2A) and power dissipation (500mW) at the 50V breakdown voltage. The elevated Vce saturation of 700mV represents a functional difference in switching characteristics. This part offers the highest DC current gain (200 @ 100mA, 2V) among the substitutes. RoHS3 compliance and MSL-1 rating confirm regulatory and handling compatibility. The PCP package maintains TO-243AA mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 2DA1797-13 be used as a direct replacement for the 2SA1797-P-AP?

A: Yes. The 2DA1797-13 meets all electrical and mechanical compatibility criteria. The higher current rating (3A) and power dissipation (900mW) provide design margin above the original 2A, 500mW specification. The matching Vce saturation of 350mV ensures equivalent switching performance.

Q: What is the primary difference between the 2SB1123S-TD-E and 2SB1123T-TD-E?

A: Both parts are functionally equivalent with identical electrical ratings. The primary difference is the DC current gain specification: 2SB1123S-TD-E provides 100 @ 100mA, 2V, while 2SB1123T-TD-E provides 200 @ 100mA, 2V. The packaging differs between PCP and Cut Tape & Digi-Reel formats.

Q: How does the Vce saturation difference affect circuit performance?

A: The 2SA1797-P-AP specifies 350mV Vce saturation, while the 2SB1123 series specifies 700mV. In saturation-mode switching applications, the higher saturation voltage of the 2SB1123 series results in increased collector-emitter voltage drop and power dissipation during the on-state. Circuit designs dependent on low saturation voltage require evaluation before substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts (2DA1797-13, 2SB1123S-TD-E, 2SB1123T-TD-E) carry RoHS3 compliance certification, matching the original 2SA1797-P-AP specification.

Q: What is the significance of the SOT-89 versus SOT-89-3 package designation?

A: Both designations refer to the same physical TO-243AA package footprint used for surface mount applications. The "-3" suffix indicates a three-terminal configuration. Mechanical compatibility is maintained across these designations.

Q: Can the 2DA1797-13 be substituted in applications requiring the exact 200MHz transition frequency?

A: The 2DA1797-13 specifies 160MHz transition frequency compared to the original 200MHz. Applications with frequency-dependent performance requirements must evaluate this specification difference. The 2SB1123 series specifies 150MHz, representing a further reduction in transition frequency.

Q: What inventory status should influence part selection?

A: The 2DA1797-13 offers the highest inventory availability (47,900 pcs), followed by 2SB1123T-TD-E (25,400 pcs) and 2SB1123S-TD-E (13,200 pcs). All substitute parts maintain active product status, ensuring long-term availability compared to the obsolete 2SA1797-P-AP.