Equivalent & Substitute Parts Reference for TIP42-S (Bourns Inc.)

Part Overview

TIP42-S is a PNP bipolar junction transistor (BJT) intended for use in general-purpose amplification and switching applications. The device features a collector-emitter voltage rating of 40 V, a collector current rating of 6 A, and is housed in a TO-220 through-hole package. As the TIP42-S is classified as obsolete, sourcing alternatives with matching electrical and mechanical characteristics is necessary for ongoing design support and maintenance.

Key Parameters

Parameter	TIP42-S (Main)
Manufacturer	Bourns Inc.
Transistor Type	PNP
Current - Collector (Ic) (Max)	6 A
Voltage - Collector Emitter Breakdown (Max)	40 V
Vce Saturation (Max) @ Ib, Ic	1.5V @ 600mA, 6A
Current - Collector Cutoff (Max)	700µA
DC Current Gain (hFE) (Min) @ Ic, Vce	15 @ 3A, 4V
Power - Max	2 W
Operating Temperature	-65°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-220-3
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute part selection is strictly based on matching key electrical and mechanical parameters. The following attributes are required for equivalence in this product category: transistor type (PNP), collector current rating (6 A), collector-emitter voltage rating (40 V), saturation voltage at specified current, DC current gain, maximum power dissipation, case type (TO-220-3), mounting type (through hole), and RoHS compliance status. Alternatives that adhere precisely to these criteria are considered valid substitutes for the TIP42-S.

Parameter Comparison

Parameter	TIP42-S (Bourns Inc.)	TIP42G (onsemi)
Transistor Type	PNP	PNP
Current - Collector (Ic) (Max)	6 A	6 A
Voltage - Collector Emitter Breakdown (Max)	40 V	40 V
Vce Saturation (Max) @ Ib, Ic	1.5V @ 600mA, 6A	1.5V @ 600mA, 6A
Current - Collector Cutoff (Max)	700µA	700µA
DC Current Gain (hFE) (Min) @ Ic, Vce	15 @ 3A, 4V	15 @ 3A, 4V
Power - Max	2 W	2 W
Operating Temperature	-65°C ~ 150°C (TJ)	-65°C ~ 150°C (TJ)
Mounting Type	Through Hole	Through Hole
Package / Case	TO-220-3	TO-220-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Last Time Buy

Engineering Selection Recommendations

TIP42-S is obsolete. Selection of alternate parts such as TIP42G follows verification of key electrical, mechanical, and compliance parameters. TIP42G conforms to RoHS3 requirements and maintains matching ratings for voltage, current, and packaging. Product status of alternatives should be considered; TIP42G is identified as Last Time Buy, with compliance designations provided.

Frequently Asked Questions (FAQ)

Q1: What electrical ratings are required when substituting TIP42-S?
A1: Substitute transistors must match the collector current (6 A), collector-emitter voltage (40 V), saturation voltage, and minimum DC current gain as listed.

Q2: Is package compatibility required for substitution?
A2: Yes. The substitute must use the TO-220-3 package and through-hole mounting to maintain form-fit equivalence.

Q3: What compliance standards must substitutes meet?
A3: RoHS3 compliance status must match that of the original TIP42-S part.

Q4: Do differences in manufacturer affect substitution suitability?
A4: Substitution is based only on matching key parameters. Manufacturer differences are permissible if parameters match.

Q5: Is product status a selection consideration?
A5: Yes. The TIP42G is Last Time Buy, which should be considered for long-term availability. Obsolete parts may not be suitable for new designs.

Q6: Are higher frequency or additional thermal parameters considered?
A6: Only the explicitly provided parameters are used for direct equivalence. Other parameters are not included in this assessment.

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