TIP35A-S Equivalent & Substitute Parts Reference

Part Overview

TIP35A-S, manufactured by Bourns Inc., is an NPN bipolar junction transistor (BJT) designed for high-power switching applications. With a maximum collector current of 25 A and a breakdown voltage of 60 V, this device is suited for robust circuit designs requiring significant current handling. The TIP35A-S is supplied in a SOT-93 (TO-218-3) through-hole package. This part is currently listed as obsolete, necessitating the identification of substitute components for continued production and long-term maintenance requirements.

Key Parameters

Parameter	Main Part: TIP35A-S
Transistor Type	NPN
Current - Collector (Ic) (Max)	25 A
Voltage - Collector Emitter Breakdown (Max)	60 V
Vce Saturation (Max) @ Ib, Ic	4V @ 5A, 25A
Current - Collector Cutoff (Max)	1mA
DC Current Gain (hFE) (Min) @ Ic, Vce	10 @ 15A, 4V
Power - Max	3.5 W
Operating Temperature	-65°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-218-3
Supplier Device Package	SOT-93
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of TIP35A-S is determined by compatibility in transistor type (NPN), maximum collector current (25 A), collector-emitter breakdown voltage (60 V), collector cutoff current (1 mA), DC current gain, saturation voltage specifications, operating temperature range, mounting style, and compliance status. Only substitute parts matching these parameters are included as valid equivalents within the category of Transistors, Bipolar (BJT).

Parameter Comparison

Parameter	TIP35A-S Bourns Inc.	TIP35AG onsemi
Transistor Type	NPN	NPN
Current - Collector (Ic) (Max)	25 A	25 A
Voltage - Collector Emitter Breakdown (Max)	60 V	60 V
Vce Saturation (Max) @ Ib, Ic	4V @ 5A, 25A	4V @ 5A, 25A
Current - Collector Cutoff (Max)	1mA	1mA
DC Current Gain (hFE) (Min) @ Ic, Vce	10 @ 15A, 4V	15 @ 15A, 4V
Power - Max	3.5 W	125 W
Operating Temperature	-65°C ~ 150°C (TJ)	-65°C ~ 150°C (TJ)
Mounting Type	Through Hole	Through Hole
Package / Case	TO-218-3	TO-247-3
Supplier Device Package	SOT-93	TO-247-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

TIP35A-S is obsolete and available only in limited inventory. When selecting a substitute, confirm active product status and RoHS compliance. TIP35AG from onsemi matches all mandatory electrical parameters and satisfies RoHS3 compliance criteria. Consider package differences (TO-218-3 vs. TO-247-3) based on the application’s physical and mechanical requirements.

Frequently Asked Questions (FAQ)

Q1: What are the primary substitution criteria between TIP35A-S and alternatives?
A1: Substitution is based on identical NPN transistor type, maximum collector current (25 A), collector-emitter breakdown voltage (60 V), collector cutoff current (1 mA), saturation voltage at equivalent current levels, DC current gain, operating temperature range, through-hole mounting, and compliance with RoHS requirements.

Q2: How does the package type affect direct replacement?
A2: TIP35A-S uses a TO-218-3 (SOT-93) package, while TIP35AG utilizes TO-247-3. Mechanical and board layout compatibility must align with package specifications.

Q3: Is there a difference in electrical performance between TIP35A-S and TIP35AG?
A3: Both parts share key operational parameters. TIP35AG provides a higher minimum DC current gain (hFE) and rated maximum power, but substitution focuses on compatibility in specified electrical limits.

Q4: Are both parts RoHS compliant?
A4: Yes, both TIP35A-S and TIP35AG are listed as ROHS3 Compliant.

Q5: Can TIP35AG be used in place of TIP35A-S in existing designs?
A5: TIP35AG matches required electrical specifications. Mechanical compatibility with the package must be confirmed.

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