BDW93C-S Equivalent & Substitute Parts Reference

Part Overview

The BDW93C-S, manufactured by Bourns Inc., is an NPN Darlington Bipolar Junction Transistor designed for standard power switching and amplification applications. It features a collector-emitter breakdown voltage of 100 V, a maximum collector current of 12 A, and a minimum DC current gain (hFE) of 750 at 5A, 3V, with a TO-220 through-hole package. As the BDW93C-S is marked as obsolete, users requiring continuity in design or replacement in servicing applications must identify suitable alternative transistors with strictly matched electrical and mechanical characteristics. The following reference identifies direct substitutes and similar alternatives strictly based on provided parameters.

Key Parameters

Parameter	BDW93C-S Value
Transistor Type	NPN - Darlington
Maximum Collector Current (Ic)	12 A
Collector-Emitter Breakdown Voltage (Vce)	100 V
Vce Saturation (Max) @ Ib, Ic	3V @ 100mA, 10A
Collector Cutoff Current (Max)	1 mA
DC Current Gain (hFE) (Min) @ Ic, Vce	750 @ 5A, 3V
Power (Max)	2 W
Operating Temperature	-65°C ~ 150°C (TJ)
Package / Case	TO-220-3
RoHS Status	ROHS3 Compliant
MSL	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

The substitutes and similar transistors are selected solely on the basis of the following key parameters: Transistor Type, Maximum Collector Current, Collector-Emitter Breakdown Voltage, DC Current Gain, Vce Saturation, Package/Case type, and compliance certifications. Only parts matching the NPN Darlington configuration, voltage rating, current rating, gain, saturation, and physical package are listed as direct substitutes. Similar transistors with minor parameter differences or alternative polarity (PNP) are included as reference options, but only NPN Darlington types with TO-220 packaging and matching electrical ratings should be used for direct substitution.

Parameter Comparison

Parameter	BDW93C-S (Bourns Inc.)	BDW93C (STMicroelectronics)	BDW93CTU (onsemi)	BDX33CG (onsemi)	BDX33C (Fairchild Semi)	TIP142T (STMicroelectronics)
Transistor Type	NPN - Darlington	NPN - Darlington	NPN - Darlington	NPN - Darlington	NPN - Darlington	NPN - Darlington
Max Collector Current (Ic)	12 A	12 A	12 A	10 A	10 A	10 A
Collector-Emitter Breakdown Voltage	100 V	100 V	100 V	100 V	100 V	100 V
Vce Saturation (Max) @ Ib, Ic	3V @ 100mA, 10A	3V @ 100mA, 10A	3V @ 100mA, 10A	2.5V @ 6mA, 3A	2.5V @ 6mA, 3A	3V @ 40mA, 10A
Collector Cutoff Current (Max)	1 mA	1 mA	1 mA	500µA	500µA	2 mA
DC Current Gain (hFE) (Min) @ Ic, Vce	750 @ 5A, 3V	750 @ 5A, 3V	750 @ 5A, 3V	750 @ 3A, 3V	750 @ 3A, 3V	1000 @ 5A, 4V
Power (Max)	2 W	80 W	80 W	70 W	70 W	80 W
Operating Temperature (TJ)	-65°C ~ 150°C	150°C	150°C	-65°C ~ 150°C	150°C	150°C
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	Not Applicable	Not Applicable	Vendor Undefined	1 (Unlimited)
Product Status	Obsolete	Active	Obsolete	Active	Active	Active

Engineering Selection Recommendations

Component selection for replacing BDW93C-S should prioritize transistors with matching NPN Darlington configuration, identical collector-emitter breakdown voltage (100 V), maximum collector current (≥10 A), mounting type (Through Hole), and package format (TO-220-3). All listed substitutes are ROHS3 Compliant with corresponding MSL and status. Active product status is preferable for ongoing supply continuity. Only the listed certifications and provided compliance details should be considered for qualification.

Frequently Asked Questions (FAQ)

Q1: What defines a direct substitute for BDW93C-S in the NPN Darlington transistor category?
A: Direct substitutes must match Transistor Type, collector-emitter breakdown voltage, maximum collector current, DC current gain, package/case, and all compliance certifications.

Q2: Are all NPN Darlington TO-220 transistors interchangeable for BDW93C-S?
A: Only transistors explicitly matching the provided electrical and mechanical parameters are considered interchangeable. Refer to side-by-side specifications for compatibility.

Q3: Can PNP Darlington transistors or different packages be substituted?
A: No. Substitution is limited to NPN Darlington types with TO-220-3 packages, per the explicit parameter match.

Q4: What should be considered when component status is obsolete?
A: Select parts listed as Active for ongoing supply assurance and ensure they hold equivalent compliance certifications.

Q5: Why is RoHS and MSL compliance relevant in substitution?
A: RoHS3 compliance ensures suitability for regulated environments; identical MSL ratings match storage and handling requirements.

Q6: How do Vce Saturation and DC Gain affect compatibility?
A: Substitute parts must have Vce(sat) and hFE (min) values equal to or exceeding those specified for the original part to maintain functional equivalence strictly per provided data.

Q7: Is inventory status relevant in engineering substitution?
A: Inventory levels are not an engineering selection criterion; only electrical, mechanical, and regulatory parameters provided above should determine substitutability.

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