UNR511L00L Equivalent & Substitute Parts

Part Overview

The UNR511L00L is a pre-biased PNP bipolar junction transistor (BJT) manufactured by Panasonic Electronic Components in the SMini3-G1 surface mount package. This device is rated for 50 V collector-emitter breakdown voltage with a maximum collector current of 100 mA and 150 mW power dissipation. The part is classified as obsolete, making equivalent substitute components necessary for new designs and ongoing production requirements. Active alternatives with compatible electrical and mechanical specifications are available from multiple manufacturers.

Substiute Parts

UNR511L00L

Panasonic Electronic ComponentsIn Stock: 4114UNR511L00L Datasheet

Current PartRFQ

DDTA143EUA-7-F

Diodes IncorporatedIn Stock: 50192DDTA143EUA-7-F Datasheet

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DTA143EUA-TP

Micro Commercial CoIn Stock: 3927DTA143EUA-TP Datasheet

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NSVMUN5132T1G

onsemiIn Stock: 5759NSVMUN5132T1G Datasheet

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PDTA143EU,115

Nexperia USA Inc.In Stock: 18507PDTA143EU,115 Datasheet

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RN2301,LF

Toshiba Semiconductor and StorageIn Stock: 1136RN2301,LF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the UNR511L00L is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Transistor Type: PNP - Pre-Biased
• Maximum Collector Current (Ic): 100 mA
• Maximum Collector-Emitter Breakdown Voltage (Vce): 50 V
• Base Resistor (R1): 4.7 kOhms
• Emitter-Base Resistor (R2): 4.7 kOhms
• Package Type: SC-70 or SOT-323 (surface mount)
• Moisture Sensitivity Level: 1 (Unlimited)

Acceptable Variation Parameters:

• Frequency - Transition: May exceed 80 MHz
• Power - Max: May exceed 150 mW
• DC Current Gain (hFE): Variations permitted within device specifications
• Vce Saturation: Variations permitted within device specifications
• Current - Collector Cutoff: Variations permitted within device specifications

All identified substitute parts meet these mandatory equivalence criteria and are available in active product status from their respective manufacturers.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Recommended for New Designs):

The DDTA143EUA-7-F (Diodes Incorporated), DTA143EUA-TP (Micro Commercial Co), PDTA143EU,115 (Nexperia), and NSVMUN5132T1G (onsemi) are all active products with ROHS3 compliance and REACH unaffected status. These parts provide superior compliance posture compared to the obsolete UNR511L00L and are suitable for applications requiring regulatory adherence.

Secondary Substitute (Power-Constrained Applications):

The RN2301,LF (Toshiba Semiconductor and Storage) is an active product with ROHS3 compliance. This part is rated for 100 mW maximum power dissipation, which is lower than the original UNR511L00L specification of 150 mW. Selection of this part is appropriate only for applications where power dissipation does not exceed 100 mW.

Compliance Considerations:

All substitute parts listed are ROHS3 compliant and carry REACH unaffected status, providing regulatory advantages over the non-compliant UNR511L00L. The original part should not be used in new designs subject to RoHS or REACH requirements.

Inventory Availability:

Substitute parts are available in significant quantities from multiple sources, ensuring supply chain continuity and reducing obsolescence risk.

Frequently Asked Questions (FAQ)

Q: Can the DDTA143EUA-7-F directly replace the UNR511L00L in existing designs?

A: Yes. The DDTA143EUA-7-F meets all mandatory electrical and mechanical parameters: 100 mA maximum collector current, 50 V collector-emitter breakdown voltage, 4.7 kOhm base and emitter-base resistors, and SC-70/SOT-323 surface mount package. The part is pin-compatible and functionally equivalent.

Q: What is the difference between the substitute parts listed?

A: All substitute parts share identical core specifications (100 mA Ic, 50 V Vce, 4.7 kOhm resistors, SOT-323 package). Differences exist in transition frequency, maximum power rating, and DC current gain specifications. The DDTA143EUA-7-F, DTA143EUA-TP, and PDTA143EU,115 offer higher power ratings (200 mW) and transition frequencies (250 MHz) compared to the original. The RN2301,LF is rated for 100 mW maximum power.

Q: Is the RN2301,LF suitable for all applications?

A: The RN2301,LF is suitable only for applications where power dissipation does not exceed 100 mW. The original UNR511L00L is rated for 150 mW. Applications requiring the full 150 mW power budget should use DDTA143EUA-7-F, DTA143EUA-TP, PDTA143EU,115, or NSVMUN5132T1G.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification. The original UNR511L00L is RoHS non-compliant. New designs and production runs should use compliant alternatives.

Q: What is the package compatibility between substitute parts?

A: All substitute parts use SC-70 or SOT-323 surface mount packages, which are mechanically and electrically equivalent. No PCB layout modifications are required for substitution.

Q: Why is the UNR511L00L classified as obsolete?

A: The UNR511L00L is listed as obsolete by Panasonic Electronic Components. Active alternatives from multiple manufacturers provide equivalent functionality with improved compliance status and ongoing supply availability.

Q: Can I use a substitute part with higher transition frequency than the original?

A: Yes. Higher transition frequency (fT) is an acceptable variation parameter. Parts with 200 MHz or 250 MHz transition frequencies exceed the original 80 MHz specification and are suitable for the same applications. No circuit modifications are required.

Q: What is the significance of the 4.7 kOhm resistor values?

A: The 4.7 kOhm base (R1) and emitter-base (R2) resistor values are internal to the pre-biased transistor package and determine the device's biasing characteristics. All substitute parts must have identical resistor values to ensure functional equivalence. This is a mandatory matching parameter.