MPS918G Equivalent & Substitute Parts

Part Overview

The MPS918G is an NPN bipolar junction transistor (BJT) manufactured by onsemi, designed for general-purpose switching and amplification applications. It features a 15V collector-emitter breakdown voltage, 50mA maximum collector current, and 600MHz transition frequency in a through-hole TO-92 package. The MPS918G is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The availability of active alternative components ensures design continuity and supply chain reliability.

Substiute Parts

MPS918G

onsemiIn Stock: 813MPS918G Datasheet

Current PartRFQ

MMBT918LT1G

onsemiIn Stock: 60245MMBT918LT1G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MPS918G is determined by electrical parameter equivalence across the following critical specifications:

Electrical Compatibility Criteria:

• Transistor type must be NPN
• Voltage - Collector Emitter Breakdown (Max) must be 15V or greater
• Current - Collector (Ic) (Max) must be 50mA or greater
• Frequency - Transition must be 600MHz or greater
• DC Current Gain (hFE) must meet or exceed 20 @ 3mA specification
• Operating Temperature Range must encompass -55°C to 150°C

Mechanical Compatibility Criteria:

• Package type may differ (through-hole or surface-mount variants acceptable)
• Base product number alignment (MPS918 series or MMBT918 series)

The MMBT918LT1G qualifies as a direct electrical substitute despite its surface-mount SOT-23-3 package, as it maintains all critical electrical parameters and is manufactured by the same supplier (onsemi).

Parameter Comparison

Engineering Selection Recommendations

MMBT918LT1G Selection Basis:

The MMBT918LT1G is the appropriate substitute for the obsolete MPS918G based on the following engineering factors:

1. Electrical Parameter Equivalence: All critical electrical specifications match or exceed the MPS918G requirements, including voltage rating, current capacity, frequency response, and gain characteristics.

2. Product Status: The MMBT918LT1G maintains active product status with onsemi, ensuring ongoing availability and supply chain continuity. The MPS918G obsolete status necessitates this substitution.

3. Compliance and Certifications: Both components share identical REACH status (REACH Unaffected), ECCN classification (EAR99), and HTSUS code (8541.21.0075), ensuring regulatory consistency.

4. Moisture Sensitivity: Both components carry MSL 1 (Unlimited) rating, indicating equivalent moisture handling requirements.

5. Package Consideration: The MMBT918LT1G uses a surface-mount SOT-23-3 package instead of the through-hole TO-92-3 package. This substitution requires PCB layout modification and is suitable for new designs or redesigned assemblies.

Frequently Asked Questions (FAQ)

Q: Can the MMBT918LT1G directly replace the MPS918G in existing through-hole PCB designs?

A: No. The MMBT918LT1G uses a surface-mount SOT-23-3 package, while the MPS918G uses a through-hole TO-92-3 package. Direct board-level substitution is not possible without PCB redesign. Adapter solutions or circuit board modification is required.

Q: Are the electrical characteristics of the MMBT918LT1G identical to the MPS918G?

A: Yes. Both transistors share equivalent NPN type, 15V breakdown voltage, 50mA maximum collector current, 600MHz transition frequency, and -55°C to 150°C operating temperature range. DC current gain specifications are equivalent at the specified test conditions.

Q: Why is the MPS918G listed as obsolete?

A: The MPS918G is classified as obsolete by onsemi. The MMBT918LT1G represents the active product line continuation, offering the same electrical performance in a modern surface-mount package format.

Q: What is the primary difference between MPS918G and MMBT918LT1G?

A: The primary difference is packaging. The MPS918G is a through-hole component (TO-92-3), while the MMBT918LT1G is a surface-mount component (SOT-23-3). Electrical performance is equivalent.

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

A: No. Both components share identical REACH status, ECCN classification, and HTSUS codes. Regulatory compliance is equivalent.

Q: What inventory status should be considered for production planning?

A: The MPS918G has 712 pieces in stock but is obsolete. The MMBT918LT1G has 60,200 pieces in stock and maintains active product status, providing superior long-term supply availability.