Equivalent & Substitute Parts for TIP31C-S

Part Overview

The TIP31C-S, manufactured by Bourns Inc., is an NPN bipolar junction transistor (BJT) categorized under "Transistors, Bipolar (BJT)" and housed in a TO-220 package. Core electrical parameters include a maximum collector-emitter voltage of 100 V, a maximum collector current of 3 A, a maximum power dissipation of 40 W, and a minimum DC current gain of 10 @ 3A, 4V. The device is RoHS3 compliant and specified for through-hole mounting. This part is currently listed as obsolete, necessitating the identification of equivalent or substitute models with matching electrical, mechanical, and compliance characteristics for continued design use and maintenance support.

Key Parameters

Parameter	Value (TIP31C-S)
Transistor Type	NPN
Current - Collector (Ic) (Max)	3 A
Voltage - Collector Emitter Breakdown (Max)	100 V
Vce Saturation (Max) @ Ib, Ic	1.2V @ 375mA, 3A
Current - Collector Cutoff (Max)	300µA
DC Current Gain (hFE) (Min) @ Ic, Vce	10 @ 3A, 4V
Power - Max	40 W
Operating Temperature	-65°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-220-3
Supplier Device Package	TO-220
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution is determined by strict equivalence in core electrical and mechanical parameters. For TIP31C-S, substitute selection requires identical or matching values in:

Transistor Type (NPN)
Maximum Collector Current (3 A)
Maximum Collector-Emitter Voltage (100 V)
Collector-Emitter Saturation Voltage
Collector Cutoff Current
Minimum DC Current Gain
Power Dissipation
Through-hole Mounting and Package (TO-220-3 / TO-220)
RoHS Compliance and MSL

Only models meeting these explicit parameters and compliance requirements are considered valid substitutes.

Parameter Comparison

Parameter	TIP31C-S (Bourns Inc.)	BD241C (STMicroelectronics)	TIP31C (Fairchild Semi)	TIP31C-BP (Micro Commercial Co)	TIP31CG (onsemi)
Transistor Type	NPN	NPN	NPN	NPN	NPN
Current - Collector (Ic) (Max)	3 A	3 A	3 A	3 A	3 A
Voltage - Collector Emitter Breakdown (Max)	100 V	100 V	100 V	100 V	100 V
Vce Saturation (Max) @ Ib, Ic	1.2V @ 375mA, 3A	1.2V @ 600mA, 3A	1.2V @ 375mA, 3A	1.2V @ 375mA, 3A	1.2V @ 375mA, 3A
Current - Collector Cutoff (Max)	300µA	300µA	200µA	300µA	300µA
DC Current Gain (hFE) (Min) @ Ic, Vce	10 @ 3A, 4V	10 @ 3A, 4V	10 @ 3A, 4V	10 @ 3A, 4V	10 @ 3A, 4V
Power - Max	40 W	40 W	40 W	2 W	2 W
Operating Temperature	-65°C ~ 150°C (TJ)	150°C (TJ)	-	150°C (TJ)	-65°C ~ 150°C (TJ)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Supplier Device Package	TO-220	TO-220	TO-220	TO-220AB	TO-220
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	-	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Vendor Undefined	1 (Unlimited)	Not Applicable
Product Status	Obsolete	Active	Active	Active	Active

Engineering Selection Recommendations

Engineering selection among substitute NPN BJT models should consider the product status and compliance certifications explicitly provided. Substitute parts BD241C (STMicroelectronics), TIP31C (Fairchild Semiconductor), TIP31C-BP (Micro Commercial Co), and TIP31CG (onsemi) are listed as "Active" and carry RoHS3 compliance where stated. Moisture Sensitivity Level is 1 (Unlimited) unless otherwise noted. Only active, RoHS3 compliant, and in-stock devices matching the stated package and mounting requirements fulfill substitution needs for replacement of the obsolete TIP31C-S.

Frequently Asked Questions (FAQ)

Q1: What are the primary criteria for substituting TIP31C-S with another transistor?
A1: Substitute transistors must have an NPN type, maximum collector current of 3 A, collector-emitter breakdown voltage of 100 V, equivalent Vce(sat) and DC current gain, power dissipation, through-hole mounting in TO-220 package, and RoHS3 compliance.

Q2: Are there any differences in package style among the substitutes?
A2: All listed substitutes use the TO-220-3 case for through-hole mounting. Supplier device packages are denoted as TO-220 or TO-220AB, consistent with the compatibility requirements.

Q3: Is RoHS compliance consistent across all substitute options?
A3: RoHS3 compliance is explicitly indicated for BD241C, TIP31C-BP, and TIP31CG. TIP31C (Fairchild Semiconductor) does not have the RoHS status provided in the input.

Q4: Why is Moisture Sensitivity Level (MSL) important for selection?
A4: MSL indicates handling and storage requirements. Substitute models specify MSL 1 (Unlimited) or equivalent, aligning with TIP31C-S.

Q5: How was product status considered in selecting substitutes?
A5: Only parts listed as "Active" are recommended as substitutes for the obsolete TIP31C-S to ensure ongoing availability and support.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message