MJE13003A-BP Equivalent & Substitute Parts

Part Overview

The MJE13003A-BP is an NPN bipolar junction transistor manufactured by Micro Commercial Co, designed for general-purpose switching and amplification applications. This device features a 400 V collector-emitter breakdown voltage rating and 1.5 A maximum collector current in a Through Hole TO-126 package. The product is classified as Obsolete, making identification of equivalent and substitute parts necessary for ongoing design support, maintenance, and production continuity. Substitute parts must maintain electrical compatibility across critical parameters including voltage ratings, current capacity, and thermal characteristics.

Substiute Parts

MJE13003A-BP

Micro Commercial CoIn Stock: 925MJE13003A-BP Datasheet

Current PartRFQ

ST13003-K

STMicroelectronicsIn Stock: 105382ST13003-K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MJE13003A-BP is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

• Transistor polarity: NPN configuration
• Voltage rating: 400 V collector-emitter breakdown voltage (maximum)
• Current capacity: 1.5 A maximum collector current
• Mounting technology: Through Hole
• Package compatibility: TO-126-3 or equivalent mechanical footprint
• Compliance: ROHS3 Compliant status

The ST13003-K qualifies as a direct substitute based on matching all critical electrical parameters (NPN type, 400 V breakdown voltage, 1.5 A collector current) and maintaining Through Hole mounting compatibility. Both parts are RoHS3 compliant and share the same base product number series (13003), indicating functional equivalence within the manufacturer's product line.

Parameter Comparison

Engineering Selection Recommendations

ST13003-K Selection Basis:

The ST13003-K is an active product manufactured by STMicroelectronics and qualifies as a direct electrical substitute for the obsolete MJE13003A-BP. Both devices share identical voltage and current ratings (400 V, 1.5 A) and maintain NPN polarity with Through Hole mounting technology. The ST13003-K offers superior power dissipation capability (40 W versus 1.25 W), providing additional thermal margin in applications where the MJE13003A-BP operates near maximum power limits.

Compliance Considerations:

Both parts maintain ROHS3 compliance and carry identical ECCN (EAR99) and HTSUS (8541.29.0095) classifications, ensuring regulatory equivalence for procurement and export purposes.

Availability:

The ST13003-K demonstrates significantly higher inventory availability (105,300 pcs) compared to the MJE13003A-BP (856 pcs), supporting long-term supply chain continuity for designs requiring this component class.

Package Consideration:

The ST13003-K is supplied in SOT-32-3 packaging while the MJE13003A-BP uses TO-126-3. Both are Through Hole packages with compatible mechanical footprints for standard PCB layouts, though physical dimensions should be verified against specific board design constraints.

Frequently Asked Questions (FAQ)

Q: Can the ST13003-K directly replace the MJE13003A-BP in existing designs?

A: Yes. Both devices are NPN transistors with identical 400 V breakdown voltage and 1.5 A maximum collector current ratings. The ST13003-K is electrically compatible for applications designed around the MJE13003A-BP specifications.

Q: What are the differences in package dimensions between TO-126-3 and SOT-32-3?

A: TO-126-3 and SOT-32-3 are both Through Hole packages with different physical geometries. PCB layout verification is required to confirm mechanical fit within existing board designs. Consult manufacturer datasheets for precise dimensional specifications.

Q: Why does the ST13003-K have a higher power rating (40 W vs 1.25 W)?

A: The ST13003-K is rated for higher power dissipation due to its package design and thermal characteristics. This provides additional operational margin but does not change the electrical substitution criteria, which are based on voltage, current, and polarity matching.

Q: Are there temperature range differences between these parts?

A: The MJE13003A-BP operates from -55°C to 150°C, while the ST13003-K operates from -40°C to 150°C. For applications requiring operation below -40°C, the MJE13003A-BP specification must be maintained. For standard industrial temperature ranges, both parts are equivalent.

Q: What is the significance of the different Vce saturation values?

A: Vce saturation differences (1 V for MJE13003A-BP versus 1.5 V for ST13003-K) reflect measurement conditions at different bias points. Both values remain within acceptable switching transistor performance ranges and do not prevent substitution in standard applications.

Q: Is the ST13003-K suitable for high-frequency applications?

A: The MJE13003A-BP specifies 5 MHz transition frequency. The ST13003-K datasheet does not provide transition frequency specification. For applications requiring specific frequency response characteristics, detailed datasheet comparison is necessary.

Q: What is the inventory status difference between these parts?

A: The MJE13003A-BP is classified as Obsolete with limited stock (856 pcs). The ST13003-K is an Active product with substantial inventory (105,300 pcs), supporting long-term design continuity and production scheduling.