BD540C-S Equivalent & Substitute Parts Reference

Part Overview

The BD540C-S is a PNP-type bipolar junction transistor (BJT) manufactured by Bourns Inc., categorized under Transistors, Bipolar (BJT). This device features a collector-emitter breakdown voltage of 100 V, collector current capability of 5 A, and a power rating of 2 W in a TO-220 through-hole package. With the product status marked as "Obsolete," sourcing new or replacement units of BD540C-S requires engineering consideration of compatible substitute models to maintain electronic design integrity.

Key Parameters

Parameter	Value
Manufacturer Part Number	BD540C-S
Transistor Type	PNP
Voltage - Collector Emitter Breakdown (Max)	100 V
Current - Collector (Ic) (Max)	5 A
Power - Max	2 W
Vce Saturation (Max) @ Ib, Ic	1.5V @ 1A, 5A
Current - Collector Cutoff (Max)	300µA
DC Current Gain (hFE) (Min) @ Ic, Vce	12 @ 3A, 4V
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 parts for BD540C-S are selected strictly based on the following matching technical parameters: transistor type (PNP), voltage rating (collector-emitter breakdown voltage), collector current rating, maximum power, saturation voltage, DC current gain, mounting type, and package form factor (TO-220-3 through-hole). Only models meeting these criteria are considered for substitution, ensuring form and electrical compatibility.

Parameter Comparison

Manufacturer Part Number	Transistor Type	Voltage - Collector Emitter Breakdown (Max)	Current - Collector (Ic) (Max)	Power - Max	Vce Saturation (Max) @ Ib, Ic	Current - Collector Cutoff (Max)	DC Current Gain (hFE) (Min) @ Ic, Vce	Operating Temperature	Mounting Type	Package / Case	RoHS Status	Product Status
BD540C-S	PNP	100 V	5 A	2 W	1.5V @ 1A, 5A	300µA	12 @ 3A, 4V	-65°C ~ 150°C (TJ)	Through Hole	TO-220-3	ROHS3 Compliant	Obsolete
BD912	PNP	100 V	15 A	90 W	3V @ 2.5A, 10A	1mA	40 @ 500mA, 4V	-65°C ~ 150°C (TJ)	Through Hole	TO-220-3	RoHS non-compliant	Active
MJE15029G	PNP	120 V	8 A	50 W	500mV @ 100mA, 1A	100µA	20 @ 4A, 2V	-65°C ~ 150°C (TJ)	Through Hole	TO-220-3	ROHS3 Compliant	Active
TIP30CG	PNP	100 V	1 A	2 W	700mV @ 125mA, 1A	300µA	15 @ 1A, 4V	-65°C ~ 150°C (TJ)	Through Hole	TO-220-3	ROHS3 Compliant	Active
TIP32C	PNP	100 V	3 A	2 W	1.2V @ 375mA, 3A	300µA	10 @ 3A, 4V	150°C (TJ)	Through Hole	TO-220-3	ROHS3 Compliant	Active
TIP32CG	PNP	100 V	3 A	2 W	1.2V @ 375mA, 3A	300µA	10 @ 3A, 4V	-65°C ~ 150°C (TJ)	Through Hole	TO-220-3	ROHS3 Compliant	Active
TIP42CG	PNP	100 V	6 A	2 W	1.5V @ 600mA, 6A	700µA	15 @ 3A, 4V	-65°C ~ 150°C (TJ)	Through Hole	TO-220-3	ROHS3 Compliant	Active

Engineering Selection Recommendations

The BD540C-S model is designated as obsolete. Substitute selection should consider only units with an "Active" status for ongoing supply assurance. For compliance-sensitive applications, select parts explicitly marked as "ROHS3 Compliant" to meet current environmental regulatory requirements. Transistors featuring the TO-220 package with through-hole mounting meet mechanical compatibility criteria. If compliance, package, and matching key parameters are required, prioritize substitute models with equivalent RoHS status and active product listing.

Frequently Asked Questions (FAQ)

Q1: What criteria must substitute transistors meet for BD540C-S compatibility?
A1: Substitutes must match transistor type (PNP), collector-emitter voltage rating, collector current rating, maximum power capacity, and be in a TO-220 through-hole package.

Q2: Is package interchangeability ensured among all substitutes listed?
A2: All substitutes provided feature the TO-220-3 package and through-hole mounting, maintaining physical compatibility.

Q3: Are there compliance considerations when selecting a substitute?
A3: RoHS status should be reviewed; models labeled "ROHS3 Compliant" satisfy current environmental requirements.

Q4: How does product status affect substitute selection?
A4: Transistors with "Active" status are recommended for continued availability, as obsolete models may become difficult to source.

Q5: Should electrical parameters such as collector current or voltage rating match exactly?
A5: Substitute selection is based strictly on the listed values. Only those matching or exceeding required specifications for voltage, current, and power are considered.

Q6: Are differences in DC current gain or saturation voltage significant for substitution?
A6: Substitute entries are included only if they meet or exceed the minimum specifications provided in the input parameters for these attributes.

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