MMBT3904VL Equivalent & Substitute Parts

Part Overview

The MMBT3904VL is an NPN bipolar junction transistor manufactured by Nexperia USA Inc., designed for general-purpose switching and amplification applications. This surface mount device operates at a maximum collector current of 200 mA with a collector-emitter breakdown voltage of 40 V and a transition frequency of 300 MHz. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified when equivalent electrical and mechanical parameters are available from alternative manufacturers, enabling procurement flexibility and supply chain continuity while maintaining circuit performance specifications.

Substiute Parts

MMBT3904VL

Nexperia USA Inc.In Stock: 9922MMBT3904VL Datasheet

Current PartRFQ

MMBT3904LT1G

onsemiIn Stock: 605202MMBT3904LT1G Datasheet

DirectRFQ

MMBT3904 RFG

Taiwan Semiconductor CorporationIn Stock: 12490MMBT3904 RFG Datasheet

SimilarRFQ

MMBT3904L RFG

Taiwan Semiconductor CorporationIn Stock: 194577MMBT3904L RFG Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MMBT3904VL is determined by electrical and mechanical parameter equivalence. The critical parameters that define substitutability are:

• Transistor Type: NPN configuration
• Maximum Collector Current (Ic): 200 mA
• Collector-Emitter Breakdown Voltage: 40 V
• DC Current Gain (hFE): Minimum 100 @ 10 mA, 1 V
• Vce Saturation: 300 mV @ 5 mA, 50 mA
• Package / Case: TO-236-3, SC-59, SOT-23-3 (surface mount)
• Mounting Type: Surface Mount
• Compliance: RoHS3 Compliant, MSL 1

Substitute parts are grouped into two categories:

Direct Equivalent (Active Status): MMBT3904LT1G from onsemi maintains all electrical parameters and active product status, with identical maximum collector current, breakdown voltage, saturation characteristics, and current gain specifications.

Similar Equivalents (Active/Obsolete Status): MMBT3904 RFG and MMBT3904L RFG from Taiwan Semiconductor Corporation provide electrical equivalence with transition frequency of 250 MHz (versus 300 MHz in the main part) and obsolete status for MMBT3904L RFG. These parts maintain identical collector current, breakdown voltage, saturation voltage, and current gain parameters.

Parameter Comparison

Engineering Selection Recommendations

MMBT3904LT1G (onsemi) is the primary direct equivalent substitute. This part maintains active product status, identical electrical specifications including 300 MHz transition frequency, and full RoHS3 compliance with MSL 1 rating. The extended operating temperature range (-55°C to 150°C) provides broader thermal coverage compared to the main part specification.

MMBT3904 RFG (Taiwan Semiconductor Corporation) is an active alternative with equivalent electrical parameters except for transition frequency of 250 MHz. This part is suitable for applications where the reduced frequency specification does not impact circuit performance requirements. Active product status ensures continued availability.

MMBT3904L RFG (Taiwan Semiconductor Corporation) provides electrical equivalence with 250 MHz transition frequency but carries obsolete product status. This part should not be selected for new designs or long-term production requirements due to discontinued manufacturing status.

All substitute parts maintain RoHS3 compliance and MSL 1 rating, ensuring compatibility with standard surface mount assembly processes and environmental regulations.

Frequently Asked Questions (FAQ)

Q: Can MMBT3904LT1G be used as a direct replacement for MMBT3904VL?

A: Yes. MMBT3904LT1G from onsemi provides direct electrical equivalence with identical maximum collector current (200 mA), collector-emitter breakdown voltage (40 V), saturation voltage (300 mV @ 5 mA, 50 mA), DC current gain (100 @ 10 mA, 1 V), and transition frequency (300 MHz). Both parts use the same TO-236-3/SOT-23-3 surface mount package and maintain active product status with RoHS3 compliance.

Q: What is the difference between MMBT3904 RFG and MMBT3904L RFG?

A: Both parts from Taiwan Semiconductor Corporation provide identical electrical parameters and package specifications. The primary difference is product status: MMBT3904 RFG is active, while MMBT3904L RFG is obsolete. For new designs and ongoing production, MMBT3904 RFG is the appropriate selection.

Q: Why does MMBT3904 RFG have a lower transition frequency (250 MHz vs. 300 MHz)?

A: The transition frequency specification differs between manufacturers due to process variations and characterization methods. Both 250 MHz and 300 MHz specifications are within acceptable ranges for general-purpose NPN transistor applications. Selection depends on specific circuit frequency requirements.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All substitute parts use the TO-236-3, SC-59, or SOT-23-3 surface mount package designation, which defines identical physical dimensions and pin configurations. PCB footprints designed for MMBT3904VL are directly compatible with all listed substitute parts.

Q: Do the substitute parts have the same moisture sensitivity level?

A: Yes. All substitute parts carry MSL 1 (Unlimited) rating, identical to MMBT3904VL. This classification indicates no moisture sensitivity restrictions and unlimited shelf life under standard storage conditions.

Q: Which substitute part should be selected for new product designs?

A: MMBT3904LT1G from onsemi is the recommended selection for new designs. This part maintains active product status, identical electrical specifications including 300 MHz transition frequency, and provides the broadest operating temperature range (-55°C to 150°C). MMBT3904 RFG from Taiwan Semiconductor Corporation is an alternative active option when the 250 MHz transition frequency meets application requirements.