2SA1552T-TL-E Equivalent & Substitute Parts

Part Overview

The 2SA1552T-TL-E is a Surface Mount PNP Bipolar Junction Transistor manufactured by onsemi, rated for 160V collector-emitter breakdown voltage and 1.5A maximum collector current. This device is classified as Obsolete, indicating it is no longer in active production. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support legacy system maintenance and repairs.

Key Parameters

Parameter	Value
Transistor Type	PNP
Current - Collector (Ic) (Max)	1.5 A
Voltage - Collector Emitter Breakdown (Max)	160 V
Power - Max	1 W
Frequency - Transition	120 MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	200 @ 100mA, 5V
Vce Saturation (Max) @ Ib, Ic	500mV @ 50mA, 500mA
Mounting Type	Surface Mount
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
Operating Temperature (TJ)	150°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 2SA1552T-TL-E are classified into two categories based on parametric equivalence and compatibility:

Parametric Equivalent (Direct Substitute): The 2SA1552T-TL-H meets all electrical and mechanical specifications of the main part. Both devices share identical ratings for collector current (1.5A), collector-emitter breakdown voltage (160V), transition frequency (120MHz), power dissipation (1W), DC current gain (200 @ 100mA, 5V), and saturation voltage (500mV @ 50mA, 500mA). Both use the same TP-FA package designation and TO-252-3 DPAK form factor. The primary difference is packaging format: 2SA1552T-TL-H is supplied in Cut Tape (CT) & Digi-Reel® format, whereas 2SA1552T-TL-E packaging is not specified.

Similar Manufacturer Part (Functional Substitute with Deviations): The 2SB1275TLP from Rohm Semiconductor shares the same transistor type (PNP), collector current rating (1.5A), and collector-emitter breakdown voltage (160V). However, this part exhibits significant differences in transition frequency (50MHz versus 120MHz), power dissipation (10W versus 1W), DC current gain (82 @ 100mA, 5V versus 200), and saturation voltage (2V @ 100mA, 1A versus 500mV @ 50mA, 500mA). The 2SB1275TLP uses the CPT3 package designation but maintains the same TO-252-3 DPAK physical form factor.

Substitution eligibility is determined by matching the following critical parameters: transistor type (PNP), maximum collector current (1.5A), maximum collector-emitter breakdown voltage (160V), and physical package compatibility (TO-252-3 DPAK).

Parameter Comparison

Parameter	2SA1552T-TL-E (Main)	2SA1552T-TL-H (Parametric Equivalent)	2SB1275TLP (Similar)
Manufacturer	onsemi	onsemi	Rohm Semiconductor
Transistor Type	PNP	PNP	PNP
Current - Collector (Ic) (Max)	1.5 A	1.5 A	1.5 A
Voltage - Collector Emitter Breakdown (Max)	160 V	160 V	160 V
Vce Saturation (Max) @ Ib, Ic	500mV @ 50mA, 500mA	500mV @ 50mA, 500mA	2V @ 100mA, 1A
Current - Collector Cutoff (Max)	1µA (ICBO)	1µA (ICBO)	1µA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	200 @ 100mA, 5V	200 @ 100mA, 5V	82 @ 100mA, 5V
Power - Max	1 W	1 W	10 W
Frequency - Transition	120 MHz	120 MHz	50 MHz
Operating Temperature (TJ)	150°C	150°C	150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252-3, DPAK (2 Leads + Tab), SC-63
Product Status	Obsolete	Obsolete	Not For New Designs
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

2SA1552T-TL-H Selection: This part is the direct parametric equivalent and is the preferred substitute for the 2SA1552T-TL-E. Both parts are classified as Obsolete and maintain identical electrical specifications across all critical parameters. The 2SA1552T-TL-H offers higher inventory availability (1472 Pcs versus 684 Pcs) and is supplied in standard Cut Tape & Digi-Reel® packaging, which is compatible with automated assembly processes. Both parts carry ROHS3 compliance and MSL Level 1 rating, ensuring equivalent environmental and handling characteristics.

2SB1275TLP Selection: This part is classified as Not For New Designs and presents significant electrical deviations from the main part. The reduced transition frequency (50MHz versus 120MHz), lower DC current gain (82 versus 200), and elevated saturation voltage (2V versus 500mV) indicate this device is suitable only for applications where these parameter differences do not impact circuit performance. The 2SB1275TLP offers substantially higher power dissipation capability (10W versus 1W), which may be advantageous in specific thermal management scenarios. This part should be selected only when the main part and parametric equivalent are unavailable and circuit design permits the electrical deviations.

Both substitute parts maintain the same physical package form factor (TO-252-3 DPAK) and thermal operating range (150°C TJ), ensuring mechanical and thermal compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can the 2SA1552T-TL-H be used as a direct replacement for the 2SA1552T-TL-E?

A: Yes. The 2SA1552T-TL-H is a parametric equivalent with identical electrical specifications. Both parts share the same maximum collector current (1.5A), collector-emitter breakdown voltage (160V), transition frequency (120MHz), DC current gain (200 @ 100mA, 5V), and saturation voltage (500mV @ 50mA, 500mA). The physical package form factor (TO-252-3 DPAK) is identical, enabling direct PCB compatibility.

Q: What are the key differences between the 2SA1552T-TL-E and the 2SB1275TLP?

A: While both are PNP transistors with 1.5A collector current and 160V breakdown voltage, the 2SB1275TLP exhibits lower transition frequency (50MHz versus 120MHz), lower DC current gain (82 versus 200), higher saturation voltage (2V versus 500mV), and higher power dissipation capability (10W versus 1W). These differences affect switching speed, amplification characteristics, and thermal performance.

Q: Are all three parts compatible with the same PCB layout?

A: Yes. All three parts use the TO-252-3 DPAK physical package form factor with identical pin configuration (2 Leads + Tab). PCB footprints and land patterns are mechanically compatible across all three devices.

Q: What is the significance of the Obsolete and Not For New Designs product status classifications?

A: Obsolete status indicates the part is no longer manufactured and existing inventory represents the final available supply. Not For New Designs status indicates the manufacturer has discontinued active support and recommends against use in new circuit designs. Both classifications necessitate substitute part identification for ongoing production and maintenance applications.

Q: Do all substitute parts meet the same environmental compliance standards?

A: Yes. The 2SA1552T-TL-E, 2SA1552T-TL-H, and 2SB1275TLP all carry ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating. All parts are REACH Unaffected and classified under ECCN EAR99.

Q: What packaging format differences exist between the main part and the parametric equivalent?

A: The 2SA1552T-TL-E packaging format is not specified in the provided data. The 2SA1552T-TL-H is supplied in Cut Tape (CT) & Digi-Reel® format, which is standard for automated assembly operations. Both parts use the TP-FA supplier device package designation.

Q: Which substitute part should be selected for new applications?

A: Neither substitute part is recommended for new applications. The 2SA1552T-TL-E is Obsolete, and the 2SB1275TLP is classified as Not For New Designs. For new circuit designs, alternative active PNP transistor parts with current production status should be evaluated.

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