2SD667L-B-AP Equivalent & Substitute Parts

Part Overview

The 2SD667L-B-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 80 V, and power dissipation capability of 900 mW in a through-hole TO-92 package. The 2SD667L-B-AP is classified as obsolete, necessitating identification of active equivalent components for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across critical parameters including current ratings, voltage specifications, and thermal operating ranges.

Substiute Parts

2SD667L-B-AP

Micro Commercial CoIn Stock: 7012SD667L-B-AP Datasheet

Current PartRFQ

ZTX453STZ

Diodes IncorporatedIn Stock: 25181ZTX453STZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2SD667L-B-AP is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

• Transistor polarity: NPN configuration
• Maximum collector current: 1 A minimum
• Collector-emitter breakdown voltage: 80 V minimum
• Power dissipation: 900 mW minimum
• Mounting configuration: Through-hole technology
• Package compatibility: TO-92 or TO-92-compatible form factor

The ZTX453STZ qualifies as a substitute part because it meets or exceeds all critical parameters. The substitute maintains NPN polarity, supports 1 A collector current, provides 100 V breakdown voltage (exceeding the 80 V requirement), delivers 1 W power dissipation (exceeding 900 mW), and is available in an E-Line package with TO-92 compatibility. Both parts are RoHS3 compliant and feature through-hole mounting suitable for identical circuit board layouts.

Parameter Comparison

Engineering Selection Recommendations

The ZTX453STZ is an active substitute for the obsolete 2SD667L-B-AP. Selection of the ZTX453STZ is supported by the following factors:

Product Status: The ZTX453STZ maintains active production status with Diodes Incorporated, ensuring long-term availability and supply chain continuity. The 2SD667L-B-AP is classified as obsolete, making the ZTX453STZ the appropriate choice for new designs and production continuity.

Regulatory Compliance: Both parts are ROHS3 compliant and carry identical moisture sensitivity ratings (MSL 1, Unlimited), confirming equivalent environmental and regulatory standing.

Electrical Performance: The ZTX453STZ exceeds the electrical specifications of the 2SD667L-B-AP across all critical parameters. The substitute provides higher collector-emitter breakdown voltage (100 V versus 80 V), increased power dissipation capability (1 W versus 900 mW), and superior transition frequency (150 MHz versus 140 MHz). The extended operating temperature range (-55°C to 200°C versus -55°C to 150°C) provides additional thermal margin for demanding applications.

Package Compatibility: The E-Line package of the ZTX453STZ is specified as TO-92 compatible, enabling direct substitution in existing through-hole circuit board layouts without modification to PCB footprints or assembly procedures.

Frequently Asked Questions (FAQ)

Q: Can the ZTX453STZ be used as a direct replacement for the 2SD667L-B-AP in existing circuit designs?

A: Yes. The ZTX453STZ meets all electrical and mechanical requirements for direct substitution. Both devices are NPN transistors with identical 1 A maximum collector current ratings, through-hole mounting, and TO-92-compatible packaging. The ZTX453STZ provides equal or superior performance across all specified parameters.

Q: What are the key differences between the 2SD667L-B-AP and ZTX453STZ?

A: The primary differences are product status and performance margins. The 2SD667L-B-AP is obsolete; the ZTX453STZ is active. The ZTX453STZ provides higher collector-emitter breakdown voltage (100 V versus 80 V), greater power dissipation (1 W versus 900 mW), higher transition frequency (150 MHz versus 140 MHz), and an extended operating temperature range (200°C maximum versus 150°C maximum). These differences represent performance enhancements rather than incompatibilities.

Q: Are there any package considerations when substituting the ZTX453STZ for the 2SD667L-B-AP?

A: The ZTX453STZ uses an E-Line package specified as TO-92 compatible. This ensures mechanical and electrical compatibility with existing TO-92 footprints. No PCB modifications or assembly procedure changes are required.

Q: What is the significance of the lower DC current gain (hFE) specification of the ZTX453STZ?

A: The ZTX453STZ specifies a minimum DC current gain of 40 at 150 mA and 10 V, compared to 60 at 150 mA and 5 V for the 2SD667L-B-AP. This difference reflects measurement conditions rather than functional incompatibility. Both devices provide sufficient current gain for standard switching and amplification applications. Circuit designs should be verified to confirm adequate base drive for the specific application.

Q: Are both parts compliant with current environmental regulations?

A: Yes. Both the 2SD667L-B-AP and ZTX453STZ are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, confirming equivalent environmental and regulatory standing for current manufacturing and assembly standards.

Q: What inventory considerations apply to this substitution?

A: The 2SD667L-B-AP is obsolete with limited remaining inventory (663 pieces). The ZTX453STZ is an active product with substantial inventory availability (25,100 pieces), ensuring reliable long-term supply for production requirements.