2SD1803S-TL-E Equivalent & Substitute Parts

Part Overview

The 2SD1803S-TL-E is an NPN bipolar junction transistor manufactured by onsemi, rated for 50V collector-emitter breakdown voltage and 5A maximum collector current. This surface mount device is designed for general-purpose switching and amplification applications in the 1W power class. The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. Active alternatives with identical or superior electrical characteristics are available to ensure design continuity and supply chain reliability.

Substiute Parts

2SD1803S-TL-E

onsemiIn Stock: 72922SD1803S-TL-E Datasheet

Current PartRFQ

2SD1803T-TL-H

onsemiIn Stock: 14012SD1803T-TL-H Datasheet

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2SCR543DTL

Rohm SemiconductorIn Stock: 8262SCR543DTL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 2SD1803S-TL-E is determined by the following critical parameters:

Primary Substitution Criteria:

• Transistor Type: NPN
• Voltage - Collector Emitter Breakdown (Max): ≥ 50V
• Current - Collector (Ic) (Max): ≥ 5A
• Mounting Type: Surface Mount
• Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63

Secondary Compatibility Factors:

• Operating Temperature: ≥ 150°C (TJ)
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Parts meeting all primary criteria are electrically and mechanically compatible. Variations in secondary parameters such as transition frequency, power rating, and DC current gain do not preclude substitution when primary electrical and mechanical specifications are satisfied or exceeded.

Parameter Comparison

Engineering Selection Recommendations

2SD1803T-TL-H (onsemi)

The 2SD1803T-TL-H is the primary substitute for the obsolete 2SD1803S-TL-E. Both parts share identical electrical specifications and package configuration. The 2SD1803T-TL-H maintains active product status with onsemi, ensuring long-term availability and supply chain stability. The only difference between these parts is packaging format: the 2SD1803T-TL-H is supplied in Tape & Reel (TR) format, while the original part uses standard packaging. This part is directly interchangeable in all applications where the 2SD1803S-TL-E was specified.

2SCR543DTL (Rohm Semiconductor)

The 2SCR543DTL is an alternative substitute that meets all primary substitution criteria. This part provides superior performance characteristics in several areas: 10W maximum power rating (versus 1W), 300MHz transition frequency (versus 180MHz), and improved DC current gain of 180 (versus 140). The collector current rating is 4A, which is marginally lower than the 5A specification of the original part. The 2SCR543DTL is suitable for applications where the original 5A specification is not critical or where the enhanced power handling and frequency response provide design advantages. All parts maintain ROHS3 compliance and identical operating temperature ratings.

Frequently Asked Questions (FAQ)

Q: Can the 2SD1803T-TL-H be used as a direct replacement for the 2SD1803S-TL-E?

A: Yes. The 2SD1803T-TL-H is electrically and mechanically identical to the 2SD1803S-TL-E. Both parts have identical voltage, current, power, and frequency specifications. The only difference is packaging format (Tape & Reel versus standard packaging). No circuit modifications are required.

Q: What is the primary reason for finding a substitute for the 2SD1803S-TL-E?

A: The 2SD1803S-TL-E is classified as obsolete. Substitute parts are necessary to ensure continued availability for production, maintenance, and repair applications.

Q: Is the 2SCR543DTL a suitable replacement if the application requires 5A collector current?

A: The 2SCR543DTL is rated for 4A maximum collector current, which is lower than the 5A specification of the 2SD1803S-TL-E. If the application requires the full 5A capability, the 2SD1803T-TL-H is the appropriate choice. If the actual operating current is below 4A, the 2SCR543DTL can be used.

Q: Are all substitute parts in the same package?

A: Yes. The 2SD1803S-TL-E, 2SD1803T-TL-H, and 2SCR543DTL all use the TO-252-3 DPAK (2 Leads + Tab) SC-63 package. All parts are surface mount devices with identical pin configurations and footprints.

Q: Do the substitute parts meet RoHS compliance requirements?

A: Yes. Both the 2SD1803T-TL-H and 2SCR543DTL are ROHS3 compliant, matching the compliance status of the original 2SD1803S-TL-E.

Q: What is the difference between the 2SD1803S-TL-E and 2SD1803T-TL-H beyond packaging?

A: The 2SD1803T-TL-H has a higher minimum DC current gain specification (200 versus 140 at 500mA, 2V). This represents an improvement in transistor performance. All other electrical parameters are identical.

Q: Can the 2SCR543DTL handle higher power dissipation than the original part?

A: Yes. The 2SCR543DTL is rated for 10W maximum power, compared to 1W for the 2SD1803S-TL-E. This provides greater thermal headroom in power-limited applications.

Q: What is the moisture sensitivity level for all substitute parts?

A: All parts, including the original 2SD1803S-TL-E and both substitutes, have Moisture Sensitivity Level (MSL) 1, which indicates unlimited shelf life without moisture control requirements.