2SC4027S-TL-H Equivalent & Substitute Parts

Part Overview

The 2SC4027S-TL-H is an NPN bipolar junction transistor manufactured by onsemi, rated for 160 V collector-emitter breakdown voltage and 1.5 A maximum collector current. This surface mount device is housed in a TO-252-3 DPAK package and is designed for general-purpose switching and amplification applications requiring moderate power dissipation up to 1 W. The part maintains active product status and is RoHS3 compliant with unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter ranges while maintaining compatibility with the same package footprint and mounting technology.

Substiute Parts

2SC4027S-TL-H

onsemiIn Stock: 32012SC4027S-TL-H Datasheet

Current PartRFQ

2SD1918TLQ

Rohm SemiconductorIn Stock: 128092SD1918TLQ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 2SC4027S-TL-H is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Transistor type must be NPN
• Voltage - Collector Emitter Breakdown rating must be 160 V or greater
• Current - Collector (Ic) maximum rating must be 1.5 A or greater
• Package / Case must be TO-252-3, DPAK (2 Leads + Tab), SC-63
• Mounting type must be Surface Mount

Secondary Parameters for Functional Equivalence:

• DC Current Gain (hFE) minimum specification
• Vce Saturation characteristics
• Frequency - Transition rating
• Power dissipation capability
• Operating temperature range

The 2SD1918TLQ meets the primary electrical and mechanical compatibility criteria, sharing identical voltage and current ratings, package configuration, and surface mount technology. Both devices are RoHS3 compliant and operate within the same temperature range.

Parameter Comparison

Engineering Selection Recommendations

2SC4027S-TL-H (Primary Selection)

The 2SC4027S-TL-H is the recommended primary choice for new designs. This part maintains active product status, ensuring long-term availability and supply chain stability. The device is RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The specified electrical parameters—120 MHz transition frequency, 140 minimum hFE, and 450 mV saturation voltage—define the baseline performance envelope for this application class.

2SD1918TLQ (Substitute Selection)

The 2SD1918TLQ is electrically compatible as a substitute part, sharing identical voltage and current ratings, package configuration, and compliance certifications. However, this part carries a "Not For New Designs" product status designation. The substitute exhibits measurable differences in secondary parameters: transition frequency is reduced to 80 MHz, DC current gain minimum is 120 (versus 140), and Vce saturation is elevated to 2 V. These differences indicate different internal design characteristics and may affect circuit performance in applications sensitive to switching speed or saturation behavior.

Selection of the 2SD1918TLQ is appropriate only for replacement or repair of existing equipment where the original 2SC4027S-TL-H is unavailable and the secondary parameter variations are acceptable for the specific application requirements.

Frequently Asked Questions (FAQ)

Q: Can the 2SD1918TLQ be used as a direct replacement for the 2SC4027S-TL-H in new designs?

A: The 2SD1918TLQ is electrically compatible at the primary parameter level (voltage, current, package) but carries "Not For New Designs" status. New designs should specify the 2SC4027S-TL-H to ensure long-term availability and consistent performance characteristics.

Q: What are the key differences between these two parts?

A: Both parts share identical voltage (160 V), current (1.5 A), and package specifications. The 2SD1918TLQ differs in transition frequency (80 MHz versus 120 MHz), DC current gain (120 versus 140 minimum), and Vce saturation voltage (2 V versus 450 mV). The 2SD1918TLQ also provides higher power dissipation capability (10 W versus 1 W).

Q: Are both parts RoHS3 compliant?

A: Yes, both the 2SC4027S-TL-H and 2SD1918TLQ are RoHS3 compliant and REACH unaffected, meeting current environmental regulations.

Q: Will the lower transition frequency of the 2SD1918TLQ affect circuit performance?

A: The 2SD1918TLQ operates at 80 MHz transition frequency compared to 120 MHz for the 2SC4027S-TL-H. Applications requiring high-speed switching or operating near the 120 MHz specification may experience performance degradation with the substitute part. Circuit-level evaluation is necessary for frequency-sensitive applications.

Q: Are the packages physically identical?

A: Yes, both parts use the TO-252-3 DPAK (2 Leads + Tab) SC-63 package with surface mount technology. PCB footprints and reflow soldering processes are compatible between the two parts.

Q: What is the moisture sensitivity rating for both parts?

A: Both parts have Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life without moisture control requirements.