UNR511D00L Equivalent & Substitute Parts

Part Overview

The UNR511D00L 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 product is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and component procurement.

Substiute Parts

UNR511D00L

Panasonic Electronic ComponentsIn Stock: 694UNR511D00L Datasheet

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DDTA144VUA-7

Diodes IncorporatedIn Stock: 986DDTA144VUA-7 Datasheet

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DDTA144VUA-7-F

Diodes IncorporatedIn Stock: 39129DDTA144VUA-7-F Datasheet

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PDTA144VU,115

NXP SemiconductorsIn Stock: 118915PDTA144VU,115 Datasheet

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RN2318(TE85L,F)

Toshiba Semiconductor and StorageIn Stock: 4226RN2318(TE85L,F) Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the UNR511D00L is determined by equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Transistor type: PNP - Pre-Biased configuration
• Maximum collector current: 100 mA
• Collector-emitter breakdown voltage: 50 V
• Base resistor (R1): 47 kOhms
• Emitter-base resistor (R2): 10 kOhms
• Moisture sensitivity level: 1 (Unlimited)

Mechanical Equivalence Criteria:

• Mounting type: Surface Mount
• Package compatibility: SC-70 or SOT-323

Substitute parts meeting these criteria are functionally interchangeable within the electrical and thermal operating envelope of the original design. Variations in transition frequency, power dissipation rating, and saturation voltage represent performance enhancements or operational differences that do not preclude substitution when the application requirements are satisfied by the substitute device specifications.

Parameter Comparison

Engineering Selection Recommendations

DDTA144VUA-7-F (Diodes Incorporated) is the primary recommended substitute. This part maintains full electrical and mechanical equivalence with the UNR511D00L across all critical parameters. The DDTA144VUA-7-F is actively manufactured, ROHS3 compliant, and available in tape and reel packaging with substantial inventory (39,080 units). The enhanced transition frequency (250 MHz) and increased power rating (200 mW) provide operational margin beyond the original specification.

DDTA144VUA-7 (Diodes Incorporated) provides equivalent electrical performance to the DDTA144VUA-7-F variant with identical specifications. This part is supplied in bulk packaging and is suitable for applications where tape and reel packaging is not required.

RN2318(TE85L,F) (Toshiba Semiconductor and Storage) is a secondary substitute meeting all electrical and mechanical equivalence criteria. This device is actively manufactured and ROHS3 compliant. The transition frequency (200 MHz) and power rating (100 mW) differ from the original specification; however, the 100 mW power rating remains adequate for applications within the 100 mA collector current envelope.

PDTA144VU,115 (NXP Semiconductors) is listed as a substitute with active product status and unlimited moisture sensitivity rating. Complete electrical and mechanical specifications are not provided in the available data; therefore, detailed parameter verification is required prior to selection.

All recommended substitutes are actively manufactured, eliminating obsolescence risk associated with the original UNR511D00L component.

Frequently Asked Questions (FAQ)

Q: Can the DDTA144VUA-7-F directly replace the UNR511D00L without circuit modification?

A: Yes. The DDTA144VUA-7-F maintains electrical equivalence across all critical parameters: 100 mA maximum collector current, 50 V collector-emitter breakdown voltage, 47 kOhm base resistor, and 10 kOhm emitter-base resistor. Both devices are surface mount in SC-70/SOT-323 packages with identical pin configurations. No circuit modification is required.

Q: What is the difference between DDTA144VUA-7 and DDTA144VUA-7-F?

A: Both parts are electrically identical. The primary difference is packaging: DDTA144VUA-7-F is supplied in tape and reel (TR) format, while DDTA144VUA-7 is supplied in bulk. Selection depends on manufacturing process requirements and inventory management practices.

Q: Why does the RN2318(TE85L,F) have a lower power rating (100 mW) than the original UNR511D00L (150 mW)?

A: The RN2318 is rated for 100 mW maximum power dissipation compared to the UNR511D00L at 150 mW. This difference does not preclude substitution when the application operates within the 100 mW thermal envelope. Verification of actual power dissipation in the target circuit is required to confirm compatibility.

Q: Are all substitute parts RoHS compliant?

A: DDTA144VUA-7, DDTA144VUA-7-F, and RN2318(TE85L,F) are ROHS3 compliant. The original UNR511D00L is RoHS non-compliant. PDTA144VU,115 compliance status is not specified in available data. Regulatory requirements for the end application determine the necessity of RoHS compliance.

Q: What is the significance of the transition frequency difference between substitutes?

A: The UNR511D00L operates at 80 MHz transition frequency, while DDTA144VUA-7 and DDTA144VUA-7-F operate at 250 MHz, and RN2318(TE85L,F) operates at 200 MHz. Higher transition frequency indicates faster switching capability. All substitutes exceed the original specification, providing operational margin for high-frequency applications. Applications limited to lower switching speeds are unaffected by this parameter difference.

Q: Is the SC-70 package identical to the SOT-323 package?

A: SC-70 and SOT-323 are equivalent designations for the same surface mount package. Both the original UNR511D00L and all substitute parts are available in this package configuration with identical pinout and mechanical dimensions.

Q: Can PDTA144VU,115 be used as a substitute?

A: PDTA144VU,115 is listed as an equivalent part with active product status. However, complete electrical specifications are not provided in available documentation. Verification of electrical parameters against application requirements is necessary prior to design implementation.