MMBT2131T1G Equivalent & Substitute Parts

Part Overview

The MMBT2131T1G is a Surface Mount PNP Bipolar Junction Transistor manufactured by onsemi, rated for 30 V collector-emitter breakdown voltage and 700 mA maximum collector current. This device is packaged in SC-74 (SOT-457) configuration and is designed for general-purpose switching and amplification applications in compact form factors.

The MMBT2131T1G carries a Last Time Buy product status, indicating that onsemi has discontinued active production. This status necessitates identification of equivalent substitute components to ensure design continuity and procurement availability for new production runs and ongoing support of existing designs.

Substiute Parts

MMBT2131T1G

onsemiIn Stock: 28355MMBT2131T1G Datasheet

Current PartRFQ

NSS30070MR6T1G

onsemiIn Stock: 15747NSS30070MR6T1G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MMBT2131T1G is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Transistor polarity: PNP
• Maximum collector current: 700 mA
• Maximum collector-emitter breakdown voltage: 30 V
• Saturation voltage characteristics: 400 mV @ 70 mA, 700 mA
• Collector cutoff current: 1 µA (ICBO)
• Minimum DC current gain: 150 @ 100 mA, 3 V
• Maximum power dissipation: 342 mW
• Operating temperature range: −55°C to 150°C

Mechanical Equivalence Criteria:

• Package type: SC-74 (SOT-457)
• Mounting technology: Surface Mount

The substitute part NSS30070MR6T1G meets all electrical specifications and mechanical requirements. The primary distinction is packaging format: NSS30070MR6T1G is supplied in Tape & Reel (TR) configuration, whereas MMBT2131T1G is supplied in standard packaging. Both devices share identical electrical performance and are manufactured by onsemi.

Parameter Comparison

Engineering Selection Recommendations

NSS30070MR6T1G is the direct electrical and mechanical equivalent of MMBT2131T1G. Selection of NSS30070MR6T1G is supported by the following factors:

1. Product Status: NSS30070MR6T1G carries Active product status, ensuring ongoing availability and manufacturing support from onsemi. The MMBT2131T1G Last Time Buy status indicates production discontinuation.

2. Electrical Equivalence: All electrical parameters are identical across both devices, including collector current rating, breakdown voltage, saturation characteristics, current gain, and power dissipation limits.

3. Mechanical Compatibility: Both devices utilize SC-74 (SOT-457) surface mount packaging, ensuring PCB footprint and assembly process compatibility.

4. Regulatory Compliance: NSS30070MR6T1G maintains ROHS3 compliance and REACH unaffected status, matching the compliance profile of MMBT2131T1G.

5. Packaging Consideration: NSS30070MR6T1G is supplied in Tape & Reel format, which is standard for high-volume production environments. Organizations requiring alternative packaging formats should contact onsemi directly for availability options.

Frequently Asked Questions (FAQ)

Q: Can NSS30070MR6T1G be used as a direct replacement for MMBT2131T1G in existing designs?

A: Yes. NSS30070MR6T1G is electrically and mechanically equivalent to MMBT2131T1G. All electrical parameters, including collector current, breakdown voltage, saturation characteristics, and current gain, are identical. The SC-74 package footprint is identical, permitting direct PCB substitution without design modification.

Q: What is the difference between MMBT2131T1G and NSS30070MR6T1G?

A: The devices are electrically identical. The primary difference is product status and packaging format. MMBT2131T1G is Last Time Buy (discontinued), while NSS30070MR6T1G is Active. NSS30070MR6T1G is supplied in Tape & Reel format, standard for production environments.

Q: Why is MMBT2131T1G marked as Last Time Buy?

A: Last Time Buy status indicates that onsemi has discontinued active production of this part number. Existing inventory may be available for a limited period. NSS30070MR6T1G provides equivalent functionality with ongoing manufacturing support.

Q: Are there any thermal or performance differences between these parts?

A: No. Both devices have identical maximum power dissipation (342 mW), operating temperature range (−55°C to 150°C), and thermal characteristics. Performance in switching and amplification applications is equivalent.

Q: Does the Tape & Reel packaging of NSS30070MR6T1G affect circuit performance?

A: No. Tape & Reel is a supply format for automated assembly processes. Once the component is removed from the reel and soldered to the PCB, electrical and thermal performance is identical to standard packaging formats.

Q: Are both parts RoHS compliant?

A: Yes. Both MMBT2131T1G and NSS30070MR6T1G are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for commercial and industrial applications.

Q: What is the Moisture Sensitivity Level (MSL) for these parts?

A: Both devices have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage procedures are sufficient; no special dry-pack or baking procedures are required.