Equivalent & Substitute Parts for D44H11

Part Overview

The onsemi D44H11 is an NPN bipolar junction transistor (BJT) rated for 80 V collector-emitter breakdown voltage and 10 A maximum collector current in a TO-220-3 through-hole package. This device is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. The D44H11 is suitable for general-purpose switching and amplification applications requiring moderate power dissipation in a standard through-hole form factor.

Substiute Parts

D44H11

onsemiIn Stock: 25235D44H11 Datasheet

Current PartRFQ

D44H11G

onsemiIn Stock: 17434D44H11G Datasheet

DirectRFQ

D44H11

Solid State Inc.In Stock: 25298D44H11 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the D44H11 is determined by electrical and mechanical parameter equivalence across the following criteria:

Primary Substitution Criteria:

• Transistor type (NPN)
• Maximum collector current (10 A)
• Maximum collector-emitter breakdown voltage (80 V)
• Saturation voltage characteristics (1 V @ 400 mA, 8 A)
• Collector cutoff current (10 µA)
• DC current gain minimum (40 @ 4 A, 1 V)
• Maximum power dissipation (2 W)
• Transition frequency (50 MHz)
• Operating temperature range (-55°C to 150°C)
• Package type (TO-220-3 through-hole)

Parts meeting all these electrical and mechanical specifications are classified as direct substitutes. Variations in packaging format (tube versus bulk) and compliance certifications do not affect electrical substitutability but may impact procurement and regulatory requirements.

Parameter Comparison

Engineering Selection Recommendations

D44H11G (onsemi) is the primary substitute for the obsolete onsemi D44H11. Both parts share identical electrical specifications across all critical parameters: 10 A collector current, 80 V breakdown voltage, 1 V saturation voltage, 40 minimum DC current gain, 2 W power rating, 50 MHz transition frequency, and -55°C to 150°C operating range. The D44H11G is currently in active production status with ROHS3 compliance certification, providing regulatory alignment for new designs and ongoing production. Packaging is supplied in tube format, which may require adjustment to procurement workflows if bulk packaging was previously used.

D44H11 (Solid State Inc.) is listed as an alternative source; however, critical electrical parameters including collector current, breakdown voltage, saturation voltage, cutoff current, DC current gain, power rating, transition frequency, and operating temperature range are not specified in available documentation. This incomplete parameter definition prevents confirmation of full electrical equivalence. Selection of this part requires verification of complete electrical specifications against the original onsemi D44H11 datasheet prior to implementation.

For applications requiring regulatory compliance with modern standards, the onsemi D44H11G is the recommended selection. For legacy systems or applications where RoHS compliance is not required, the original onsemi D44H11 remains available in existing inventory.

Frequently Asked Questions (FAQ)

Q: Can the D44H11G directly replace the obsolete D44H11 in existing designs?

A: Yes. The D44H11G shares all specified electrical parameters with the original D44H11: 10 A collector current, 80 V breakdown voltage, 1 V saturation voltage, 40 minimum DC current gain, 2 W power dissipation, 50 MHz transition frequency, and -55°C to 150°C operating temperature range. Both use the TO-220-3 through-hole package. The primary difference is product status (active versus obsolete) and RoHS compliance (ROHS3 versus non-compliant).

Q: What is the difference between D44H11 and D44H11G?

A: Both are onsemi NPN transistors with identical electrical specifications. The D44H11G is the current production variant with ROHS3 compliance certification. The original D44H11 is classified as obsolete. Packaging differs: D44H11G is supplied in tube format, while the original D44H11 packaging format is not specified.

Q: Is the Solid State Inc. D44H11 equivalent to the onsemi D44H11?

A: Electrical equivalence cannot be confirmed. The Solid State Inc. D44H11 datasheet does not provide specifications for collector current, breakdown voltage, saturation voltage, cutoff current, DC current gain, power rating, transition frequency, or operating temperature range. Complete parameter verification against the original onsemi D44H11 specifications is required before substitution.

Q: Does the TO-220-3 package remain the same across all substitute parts?

A: Yes. All listed parts use the TO-220-3 through-hole package, ensuring mechanical and thermal interface compatibility with existing PCB designs and heat sink mounting arrangements.

Q: Are there compliance differences between the D44H11 and D44H11G?

A: Yes. The original onsemi D44H11 is RoHS non-compliant. The D44H11G is ROHS3 compliant. Both are REACH unaffected and classified under ECCN EAR99. For applications subject to RoHS regulatory requirements, the D44H11G is the appropriate selection.

Q: What inventory status should be considered when selecting a substitute?

A: The original onsemi D44H11 has 25,200 pieces in stock with obsolete status. The onsemi D44H11G has 17,400 pieces in stock with active production status. For long-term supply assurance, the D44H11G is the preferred choice despite lower current inventory levels.