BD746C-S Equivalent & Substitute Parts Reference

Part Overview

The BD746C-S is a PNP bipolar junction transistor (BJT) manufactured by Bourns Inc. It features a maximum collector current of 20 A and a collector-emitter breakdown voltage of 100 V, housed in a SOT-93 (TO-218-3) through-hole package. The part is obsolete, necessitating the identification of equivalent or substitute BJTs that match the essential electrical and mechanical characteristics for continuity in design and inventory replacement.

Key Parameters

Manufacturer Part Number	Transistor Type	Current - Collector (Ic) (Max)	Voltage - Collector Emitter Breakdown (Max)	DC Current Gain (hFE) (Min) @ Ic, Vce	Power - Max	Operating Temperature	Mounting Type	Package / Case	RoHS Status
BD746C-S	PNP	20 A	100 V	20 @ 5A, 4V	3.5 W	-65°C ~ 150°C (TJ)	Through Hole	TO-218-3	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute selection for the BD746C-S is based strictly on matching core parameters:

Transistor type
Maximum collector current (Ic)
Collector-emitter breakdown voltage (Vce)
DC current gain (hFE) at specified Ic and Vce values
Power rating
Through-hole mounting style
Package type compatibility
RoHS compliance status All substitute BJT transistors listed conform to these criteria as provided in the input.

Parameter Comparison

Manufacturer Part Number	Transistor Type	Current - Collector (Ic) (Max)	Voltage - Collector Emitter Breakdown (Max)	DC Current Gain (hFE) (Min) @ Ic, Vce	Power - Max	Operating Temperature	Mounting Type	Package / Case	RoHS Status
BD746C-S	PNP	20 A	100 V	20 @ 5A, 4V	3.5 W	-65°C ~ 150°C (TJ)	Through Hole	TO-218-3	ROHS3 Compliant
TIP36C	PNP	25 A	100 V	10 @ 15A, 4V	125 W	-65°C ~ 150°C (TJ)	Through Hole	TO-218-3	RoHS non-compliant
TIP36CG	PNP	25 A	100 V	15 @ 15A, 4V	125 W	-65°C ~ 150°C (TJ)	Through Hole	TO-247-3	ROHS3 Compliant

Engineering Selection Recommendations

When selecting substitutes for BD746C-S, product status and compliance are primary engineering criteria. BD746C-S is obsolete. TIP36C is active but RoHS non-compliant; TIP36CG is active and ROHS3 compliant. TIP36C shares the TO-218-3 package, while TIP36CG utilizes TO-247-3. Only use ROHS3 compliant parts where compliance is mandated. Always match the package and mounting type to mechanical requirements as provided.

Frequently Asked Questions (FAQ)

Q1: What are the critical parameters for choosing a substitute PNP BJT for BD746C-S?
A1: The critical parameters are transistor type (PNP), maximum collector current, collector-emitter breakdown voltage, DC current gain at defined conditions, power rating, operating temperature range, mounting type, and package compatibility.

Q2: Does the package type influence direct substitution?
A2: Yes. BD746C-S uses a TO-218-3 (SOT-93) package. Substitute TIP36C shares this package type. TIP36CG features a TO-247-3, which may differ in physical footprint.

Q3: Which substitute part maintains RoHS3 compliance?
A3: BD746C-S and TIP36CG are ROHS3 compliant. TIP36C does not comply with RoHS.

Q4: How does current gain (hFE) compare among these substitutes?
A4: BD746C-S has a minimum hFE of 20 @ 5A, 4V. TIP36C has 10 @ 15A, 4V, and TIP36CG has 15 @ 15A, 4V.

Q5: Are the substitutes actively manufactured?
A5: TIP36C and TIP36CG are listed as active status. BD746C-S is obsolete.

Q6: Is there a difference in maximum collector current between BD746C-S and its substitutes?
A6: Substitutes TIP36C and TIP36CG offer up to 25 A maximum collector current, compared to BD746C-S at 20 A.

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