UNR511M00L Equivalent & Substitute Parts

Part Overview

The UNR511M00L is a pre-biased PNP bipolar junction transistor (BJT) manufactured by Panasonic Electronic Components, designed for surface mount applications in the SC-70/SOT-323 package. This device integrates internal base and emitter resistors, enabling direct logic-level switching without external biasing networks. The part is classified as obsolete, necessitating identification of functionally equivalent active alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP - Pre-Biased	—
Maximum Collector Current (Ic)	100	mA
Collector-Emitter Breakdown Voltage (Max)	50	V
Base Resistor (R1)	2.2	kOhms
Emitter-Base Resistor (R2)	47	kOhms
DC Current Gain (hFE Min)	80	@ 5mA, 10V
Vce Saturation (Max)	250	mV @ 300µA, 10mA
Collector Cutoff Current (Max)	500	nA
Transition Frequency	80	MHz
Maximum Power Dissipation	150	mW
Package Type	SC-70, SOT-323	—
Mounting Type	Surface Mount	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the UNR511M00L is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

Transistor type: PNP - Pre-Biased configuration
Maximum collector current: 100 mA
Collector-emitter breakdown voltage: 50 V
Base resistor (R1): 2.2 kOhms
Emitter-base resistor (R2): 47 kOhms
DC current gain (hFE): minimum 80
Package/case: SC-70 or SOT-323
Mounting type: Surface Mount
Moisture sensitivity level: 1 (Unlimited)

All three substitute parts listed below satisfy these mandatory criteria. Variations in transition frequency, power dissipation, and saturation voltage characteristics remain within acceptable operational ranges for pre-biased BJT applications and do not preclude functional substitution.

Parameter Comparison

Parameter	UNR511M00L (Panasonic)	DTA123JUA-TP (Micro Commercial Co)	MUN5135T1G (onsemi)	PDTA123JU,115 (Nexperia)
Product Status	Obsolete	Active	Active	Active
Transistor Type	PNP - Pre-Biased	PNP - Pre-Biased	PNP - Pre-Biased	PNP - Pre-Biased
Ic (Max)	100 mA	100 mA	100 mA	100 mA
Vce Breakdown (Max)	50 V	50 V	50 V	50 V
R1 (Base Resistor)	2.2 kOhms	2.2 kOhms	2.2 kOhms	2.2 kOhms
R2 (Emitter-Base Resistor)	47 kOhms	47 kOhms	47 kOhms	47 kOhms
hFE (Min)	80 @ 5mA, 10V	80 @ 10mA, 5V	80 @ 5mA, 10V	100 @ 10µA, 5V
Vce Saturation (Max)	250 mV @ 300µA, 10mA	300 mV @ 250µA, 5mA	250 mV @ 300µA, 10mA	100 mV @ 250µA, 5mA
Icbo (Max)	500 nA	500 nA	500 nA	100 nA
Transition Frequency	80 MHz	250 MHz	Not specified	Not specified
Power (Max)	150 mW	200 mW	202 mW	200 mW
Package	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

DTA123JUA-TP (Micro Commercial Co): This substitute is actively manufactured and available in high inventory (3,887 pcs). It meets all mandatory electrical parameters and is packaged in SOT-323 format. The device is ROHS3 compliant and carries REACH unaffected status. The elevated transition frequency (250 MHz) and increased power rating (200 mW) provide operational margin above the original specification. Saturation voltage is marginally higher (300 mV vs. 250 mV), which remains acceptable for pre-biased switching applications.

MUN5135T1G (onsemi): This substitute is actively produced with the highest inventory availability (6,300 pcs). Electrical parameters closely match the original UNR511M00L, including identical saturation voltage (250 mV @ 300µA, 10mA) and DC current gain test conditions. The device is ROHS3 compliant and REACH unaffected. Power dissipation (202 mW) exceeds the original specification. This part represents the closest functional equivalent.

PDTA123JU,115 (Nexperia): This substitute is actively manufactured with substantial inventory (6,991 pcs) and carries automotive-grade qualification (AEC-Q100). It is ROHS3 compliant and REACH unaffected. The device exhibits superior performance characteristics, including lower saturation voltage (100 mV) and reduced collector cutoff current (100 nA vs. 500 nA). These characteristics make it suitable for applications requiring enhanced switching performance and lower leakage current. The automotive qualification adds value for safety-critical applications.

Frequently Asked Questions (FAQ)

Q: Can the DTA123JUA-TP directly replace the UNR511M00L in existing PCB designs?

A: Yes. Both devices share identical package geometry (SC-70/SOT-323), identical internal resistor values (R1 = 2.2 kOhms, R2 = 47 kOhms), and equivalent electrical ratings. Pin-to-pin compatibility is maintained. No PCB layout modifications are required.

Q: What is the significance of the higher transition frequency in the DTA123JUA-TP (250 MHz vs. 80 MHz)?

A: The transition frequency indicates the maximum frequency at which the transistor maintains useful gain. The DTA123JUA-TP's higher transition frequency provides operational margin for high-speed switching applications. For standard pre-biased switching circuits, this parameter does not affect functional compatibility.

Q: Why does the PDTA123JU,115 have lower saturation voltage than the original part?

A: Lower saturation voltage (100 mV vs. 250 mV) indicates improved switching efficiency and reduced power dissipation during the on-state. This is a performance enhancement that does not compromise compatibility. Applications benefit from reduced heat generation and improved switching speed.

Q: Is the automotive qualification of the PDTA123JU,115 necessary for non-automotive applications?

A: Automotive qualification (AEC-Q100) is not required for non-automotive applications. However, the qualification process ensures enhanced reliability testing and stricter manufacturing controls. The PDTA123JU,115 is suitable for any application where the UNR511M00L was used, with the added assurance of automotive-grade quality standards.

Q: Can these substitutes be used interchangeably in the same circuit?

A: Yes. All three substitutes meet the mandatory electrical and mechanical criteria for the UNR511M00L. Circuit performance remains equivalent across all three alternatives. Selection among the three substitutes may be based on availability, cost, or specific performance requirements (e.g., automotive qualification, power dissipation margin).

Q: What is the impact of the different hFE test conditions across the substitute parts?

A: The DC current gain (hFE) is measured at different collector current and collector-emitter voltage conditions across the parts. All substitutes maintain a minimum hFE of 80, which satisfies the pre-biased switching requirement. Variations in test conditions reflect different manufacturer characterization methodologies and do not affect functional substitution.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three active substitutes (DTA123JUA-TP, MUN5135T1G, and PDTA123JU,115) are ROHS3 compliant. The original UNR511M00L RoHS status is not specified in the available data.

Q: What packaging format is recommended for new designs?

A: All substitute parts are available in Tape & Reel (TR) packaging, which is standard for high-volume surface mount assembly. The SC-70/SOT-323 package remains the industry standard for pre-biased BJT devices and is widely supported by automated assembly equipment.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message