2SD667A-C-AP Equivalent & Substitute Parts

Part Overview

The 2SD667A-C-AP is an NPN bipolar junction transistor manufactured by Micro Commercial Co, designed for general-purpose switching and amplification applications. This device features a maximum collector current of 1 A, collector-emitter breakdown voltage of 100 V, and maximum power dissipation of 900 mW in a Through Hole TO-92MOD package. The 2SD667A-C-AP is classified as obsolete, making identification of functionally equivalent substitute components necessary for ongoing design support, maintenance, and production continuity.

Substiute Parts

2SD667A-C-AP

Micro Commercial CoIn Stock: 9442SD667A-C-AP Datasheet

Current PartRFQ

ZTX453STZ

Diodes IncorporatedIn Stock: 25181ZTX453STZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2SD667A-C-AP is determined by equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Transistor type: NPN configuration
• Maximum collector current (Ic): 1 A minimum
• Collector-emitter breakdown voltage (VCEO): 100 V minimum
• Maximum power dissipation: 900 mW minimum
• Transition frequency: 140 MHz minimum

Mechanical Equivalence Criteria:

• Mounting type: Through Hole
• Package compatibility: TO-92 form factor or TO-92 compatible packages

Compliance Criteria:

• RoHS3 compliance
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The ZTX453STZ meets all substitution criteria through electrical parameter equivalence and mechanical compatibility, despite differences in packaging designation and supplier device package classification.

Parameter Comparison

Engineering Selection Recommendations

ZTX453STZ as Primary Substitute:

The ZTX453STZ is an active product manufactured by Diodes Incorporated and serves as a direct functional equivalent to the obsolete 2SD667A-C-AP. Both devices are NPN bipolar junction transistors with identical maximum collector current (1 A) and collector-emitter breakdown voltage (100 V) ratings. The ZTX453STZ provides enhanced specifications in power dissipation (1 W versus 900 mW) and transition frequency (150 MHz versus 140 MHz), establishing superior performance margins for existing circuit designs.

Both components maintain ROHS3 compliance and unlimited moisture sensitivity classification (MSL 1), ensuring compatibility with current manufacturing and environmental standards. The ZTX453STZ operates across an extended temperature range (-55°C to 200°C) compared to the 2SD667A-C-AP (-55°C to 150°C), providing additional thermal headroom for demanding applications.

The E-Line package of the ZTX453STZ is mechanically compatible with TO-92 form factor applications, supporting direct board-level substitution in through-hole designs. Active product status and substantial inventory availability (25,100 pieces) ensure long-term supply continuity and design support.

Frequently Asked Questions (FAQ)

Q: Can the ZTX453STZ directly replace the 2SD667A-C-AP in existing circuit designs?

A: Yes. Both devices are NPN transistors with identical maximum collector current (1 A) and collector-emitter breakdown voltage (100 V) specifications. The ZTX453STZ E-Line package is mechanically compatible with TO-92 form factor through-hole applications, supporting direct substitution without circuit modification.

Q: What are the key differences between these two transistors?

A: The ZTX453STZ provides enhanced power dissipation (1 W versus 900 mW), higher transition frequency (150 MHz versus 140 MHz), and extended maximum operating temperature (200°C versus 150°C). These represent performance improvements rather than limitations, making the ZTX453STZ suitable for applications requiring higher thermal or frequency performance.

Q: Are there compliance or certification differences between these parts?

A: Both the 2SD667A-C-AP and ZTX453STZ are ROHS3 compliant with unlimited moisture sensitivity classification (MSL 1). No compliance barriers exist for substitution in applications requiring these certifications.

Q: What is the significance of the different package designations (TO-92MOD versus E-Line)?

A: Both packages are through-hole form factors with TO-92 compatible lead configurations. The E-Line designation indicates a specific package variant from Diodes Incorporated that maintains mechanical and electrical compatibility with standard TO-92 applications. Lead geometry and spacing are compatible for direct board-level substitution.

Q: Why is the 2SD667A-C-AP classified as obsolete?

A: Obsolete status indicates the manufacturer (Micro Commercial Co) has discontinued production. The ZTX453STZ, as an active product from Diodes Incorporated, provides ongoing supply and design support for applications previously served by the 2SD667A-C-AP.

Q: Are there any DC current gain (hFE) considerations for substitution?

A: The 2SD667A-C-AP specifies minimum hFE of 100 @ 150mA, 5V, while the ZTX453STZ specifies minimum hFE of 40 @ 150mA, 10V. These represent different measurement conditions. Circuit designs should be evaluated based on actual operating point requirements rather than these specification values alone.