2SA1552T-E Equivalent & Substitute Parts

Part Overview

The 2SA1552T-E is a PNP bipolar junction transistor manufactured by onsemi, rated for 160 V collector-emitter breakdown voltage and 1.5 A maximum collector current. This device is designed for surface mount applications in the TO-252-3 (DPAK) package. The 2SA1552T-E is classified as obsolete, necessitating identification of functionally equivalent substitute components for ongoing production and maintenance applications.

Substiute Parts

2SA1552T-E

onsemiIn Stock: 8902SA1552T-E Datasheet

Current PartRFQ

2SB1275TLP

Rohm SemiconductorIn Stock: 105782SB1275TLP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2SA1552T-E is determined by equivalence in the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Transistor polarity: PNP
• Maximum collector current: 1.5 A
• Maximum collector-emitter breakdown voltage: 160 V
• Collector cutoff current: 1 µA (ICBO)
• Operating temperature range: 150°C (TJ)
• Package type: TO-252-3 (DPAK)

Allowable Parameter Variations: Substitute parts may differ in DC current gain (hFE), saturation voltage (Vce), transition frequency, and maximum power dissipation, provided the primary electrical ratings and package configuration remain equivalent. These secondary parameters do not preclude substitution when the primary ratings are met.

The 2SB1275TLP from Rohm Semiconductor meets all primary electrical and mechanical equivalence criteria and is therefore classified as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

2SB1275TLP Selection Basis:

The 2SB1275TLP is electrically and mechanically equivalent to the 2SA1552T-E across all primary ratings: collector current (1.5 A), breakdown voltage (160 V), collector cutoff current (1 µA), operating temperature (150°C), and package configuration (TO-252-3 DPAK).

The 2SB1275TLP exhibits higher maximum power dissipation (10 W versus 1 W) and lower transition frequency (50 MHz versus 120 MHz). These differences represent enhanced thermal capability and reduced high-frequency performance relative to the original part. The 2SB1275TLP carries a product status of "Not For New Designs," indicating it is suitable for replacement and maintenance applications but not recommended for new circuit development.

The 2SB1275TLP is RoHS3 compliant, whereas the 2SA1552T-E compliance status is not specified. Both parts are REACH unaffected and carry EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can the 2SB1275TLP directly replace the 2SA1552T-E in existing circuits?

A: Yes. Both devices are PNP transistors with identical maximum collector current (1.5 A), breakdown voltage (160 V), and package configuration (TO-252-3 DPAK). Pin-to-pin compatibility is maintained. Circuit performance may differ due to variations in DC current gain and saturation voltage; circuit validation is required for applications sensitive to these parameters.

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

A: The 2SB1275TLP provides higher power dissipation capability (10 W versus 1 W) and lower transition frequency (50 MHz versus 120 MHz). The 2SA1552T-E exhibits lower saturation voltage (500 mV versus 2 V at specified conditions) and higher DC current gain (200 versus 82 at 100 mA, 5 V).

Q: Are both parts available in the same package?

A: Yes. Both the 2SA1552T-E and 2SB1275TLP use the TO-252-3 (DPAK) surface mount package with identical pin configuration and footprint.

Q: Why is the 2SA1552T-E classified as obsolete?

A: The 2SA1552T-E is marked obsolete by the manufacturer. The 2SB1275TLP is classified as "Not For New Designs," indicating both parts are legacy components. For new circuit development, consultation of current manufacturer datasheets and availability is required.

Q: What is the moisture sensitivity level for these parts?

A: Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Are there compliance or regulatory differences between these parts?

A: The 2SB1275TLP is RoHS3 compliant. Both parts are REACH unaffected and carry EAR99 export classification. Compliance requirements for specific applications must be verified against end-use regulations.