UNR32AM00L Equivalent & Substitute Parts

Part Overview

The UNR32AM00L is a pre-biased NPN bipolar junction transistor (BJT) manufactured by Panasonic Electronic Components. This surface mount device is designed for general-purpose switching and amplification applications with a maximum collector current of 80 mA and collector-emitter breakdown voltage of 50 V. The device is packaged in the SSSMini3-F1 form factor (SOT-723).

The UNR32AM00L is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs, repairs, and legacy system support.

Substiute Parts

UNR32AM00L

Panasonic Electronic ComponentsIn Stock: 1124UNR32AM00L Datasheet

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DTC123JM3T5G

onsemiIn Stock: 19128DTC123JM3T5G Datasheet

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RN1105MFV,L3F

Toshiba Semiconductor and StorageIn Stock: 1012RN1105MFV,L3F Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the UNR32AM00L is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Transistor type must be NPN pre-biased
• Collector-emitter breakdown voltage must be 50 V or greater
• Base resistor (R1) must be 2.2 kOhms
• Emitter-base resistor (R2) must be 47 kOhms
• DC current gain (hFE) minimum of 80 at specified test conditions
• Collector cutoff current maximum of 500 nA

Mechanical Compatibility Requirements:

• Package must be SOT-723 or equivalent form factor
• Surface mount mounting type
• Moisture sensitivity level 1 (unlimited)

Performance Considerations:

• Maximum collector current of 80 mA or greater
• Maximum power dissipation of 100 mW or greater
• Transition frequency of 150 MHz or greater

Substitute parts must meet or exceed all electrical parameters while maintaining identical or compatible mechanical specifications. Parts that exceed the specified maximum ratings are acceptable for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

DTC123JM3T5G (onsemi) is the primary substitute for the UNR32AM00L. This part maintains identical electrical specifications for all critical parameters including base and emitter-base resistor values, DC current gain, and collector-emitter breakdown voltage. The DTC123JM3T5G exceeds the original part in maximum collector current (100 mA vs. 80 mA) and power dissipation (260 mW vs. 100 mW), providing enhanced performance margins. The part is active in production status and RoHS3 compliant, ensuring long-term availability and regulatory compliance. Packaging is SOT-723 with tape and reel availability.

RN1105MFV,L3F (Toshiba Semiconductor and Storage) is an alternative substitute that meets all critical electrical parameters. This part also provides increased maximum collector current (100 mA) and power dissipation (150 mW) compared to the original. The RN1105MFV,L3F is active in production and RoHS compliant. The part is supplied in VESM package format, which is mechanically compatible with SOT-723 specifications. Inventory availability is confirmed.

Both substitute parts are suitable for direct replacement in applications where the UNR32AM00L is specified. Selection between substitutes should be based on supply chain availability, packaging preferences, and procurement lead times.

Frequently Asked Questions (FAQ)

Q: Can the DTC123JM3T5G directly replace the UNR32AM00L without circuit modifications?

A: Yes. The DTC123JM3T5G maintains identical base resistor (2.2 kOhms), emitter-base resistor (47 kOhms), and DC current gain specifications. The SOT-723 package is mechanically identical. The higher maximum collector current and power dissipation ratings do not require circuit changes.

Q: What is the difference between the DTC123JM3T5G and RN1105MFV,L3F substitutes?

A: Both parts meet the electrical requirements of the UNR32AM00L. The primary differences are manufacturer (onsemi vs. Toshiba), maximum power dissipation (260 mW vs. 150 mW), and package supplier designation (SOT-723 vs. VESM). Both are mechanically compatible and electrically equivalent for the UNR32AM00L application.

Q: Are there any compliance or regulatory differences between the original and substitute parts?

A: The DTC123JM3T5G is RoHS3 compliant and REACH unaffected. The RN1105MFV,L3F is RoHS compliant. Both parts have MSL rating of 1 (unlimited moisture sensitivity). The original UNR32AM00L does not specify RoHS status due to its obsolete classification.

Q: What is the significance of the pre-biased configuration in these transistors?

A: Pre-biased transistors integrate internal base and emitter-base resistors (R1 and R2) within the device package. This configuration simplifies circuit design by eliminating the need for external biasing resistors. All three parts (original and substitutes) maintain identical R1 (2.2 kOhms) and R2 (47 kOhms) values, ensuring functional equivalence.

Q: Can the UNR32AM00L be used in applications designed for the DTC123JM3T5G?

A: The UNR32AM00L meets the minimum electrical specifications required by the DTC123JM3T5G. However, the lower maximum collector current (80 mA vs. 100 mA) and power dissipation (100 mW vs. 260 mW) may limit performance in applications requiring the higher ratings. Circuit analysis is necessary to confirm suitability.

Q: What packaging formats are available for these substitute parts?

A: The DTC123JM3T5G is supplied in tape and reel (TR) format. The RN1105MFV,L3F is supplied in VESM package format. Both are surface mount devices in the SOT-723 form factor, compatible with standard pick-and-place assembly equipment.

Q: Are there any frequency or switching speed differences between these parts?

A: The UNR32AM00L specifies a transition frequency of 150 MHz. The DTC123JM3T5G specifies 260 MHz, providing higher frequency capability. The RN1105MFV,L3F does not specify transition frequency in the provided data. For applications requiring specific frequency performance, the DTC123JM3T5G offers enhanced capability.