BD442 Equivalent & Substitute Parts

Part Overview

The BD442 is a PNP bipolar junction transistor manufactured by onsemi, designed for through-hole applications in the TO-126 package. This device is rated for 80 V collector-emitter breakdown voltage, 4 A maximum collector current, and 36 W maximum power dissipation. The BD442 is classified as obsolete, which necessitates identification of equivalent substitute components for ongoing design support and procurement requirements. The BD442G represents the direct equivalent with active product status and improved compliance characteristics.

Substiute Parts

BD442

onsemiIn Stock: 2321BD442 Datasheet

Current PartRFQ

BD442G

onsemiIn Stock: 1552BD442G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BD442 is determined by strict equivalence across all electrical and mechanical parameters. The substitute part must satisfy the following criteria:

• Transistor Type: PNP configuration
• Current Rating: 4 A maximum collector current
• Voltage Rating: 80 V collector-emitter breakdown voltage
• Saturation Characteristics: 800mV @ 300mA, 3A
• Collector Cutoff Current: 100µA (ICBO)
• DC Current Gain: 40 minimum @ 500mA, 1V
• Power Dissipation: 36 W maximum
• Transition Frequency: 3 MHz
• Temperature Range: -55°C to 150°C (TJ)
• Package: TO-126 through-hole configuration

The BD442G meets all electrical and mechanical specifications identical to the BD442, with the distinction of active product status and improved regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The BD442 is classified as obsolete, making the BD442G the appropriate substitute for new designs and ongoing production requirements. The BD442G maintains complete electrical and mechanical equivalence while offering active product status and ROHS3 compliance. The transition from BD442 to BD442G does not require circuit redesign, as all functional parameters remain identical. The BD442G is suitable for direct replacement in existing applications without modification to PCB layouts or component footprints, given the identical TO-126 through-hole package configuration.

Frequently Asked Questions (FAQ)

Q: Can BD442G be used as a direct replacement for BD442 in existing designs?

A: Yes. The BD442G is electrically and mechanically equivalent to the BD442 across all specified parameters, including current rating, voltage rating, power dissipation, gain characteristics, and package configuration. Direct substitution is supported without circuit modification.

Q: What is the primary difference between BD442 and BD442G?

A: The BD442G has active product status, whereas the BD442 is obsolete. Additionally, the BD442G is ROHS3 compliant, while the BD442 is RoHS non-compliant. All electrical and thermal specifications are identical.

Q: Are there any package or pinout differences between these parts?

A: No. Both the BD442 and BD442G use the TO-126 through-hole package with identical pinout and mechanical dimensions. PCB layouts require no modification for substitution.

Q: What compliance certifications apply to the BD442G?

A: The BD442G is ROHS3 compliant and REACH unaffected. The ECCN classification is EAR99, and the HTSUS code is 8541.29.0095.

Q: Is the BD442G available in the same packaging options as the BD442?

A: The BD442G is supplied in bulk packaging, whereas the BD442 was supplied in standard packaging. Both use the TO-126 supplier device package. Verify packaging requirements with your procurement specification.