PUMD2/ZLZ Pre-Biased Bipolar Transistor Equivalent & Substitute Parts

Part Overview

The PUMD2/ZLZ is a pre-biased dual bipolar transistor (1 NPN, 1 PNP) manufactured by Nexperia USA Inc. in a 6-TSSOP surface mount package. This component integrates internal base resistors for simplified circuit design and reduced component count in switching and logic applications. The part is currently classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility with existing designs.

Key Parameters

Parameter	Value	Unit
Transistor Type	1 NPN, 1 PNP - Pre-Biased (Dual)	—
Maximum Collector Current (Ic)	100	mA
Collector-Emitter Breakdown Voltage (Max)	50	V
Base Resistor (R1)	22	kOhms
Emitter-Base Resistor (R2)	22	kOhms
DC Current Gain (hFE Min)	60	@ 5mA, 5V
Vce Saturation (Max)	150	mV @ 500µA, 10mA
Maximum Power Dissipation	300	mW
Package Type	6-TSSOP / SC-88 / SOT-363	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the PUMD2/ZLZ is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor configuration: 1 NPN, 1 PNP pre-biased dual or equivalent single-type alternatives
Maximum collector current: 100 mA minimum
Collector-emitter breakdown voltage: 50 V minimum
Base and emitter-base resistor values: 22 kOhms
Package compatibility: 6-TSSOP, SC-88, or SOT-363 surface mount
RoHS3 compliance and MSL 1 rating

Substitution Groups:

Group 1: Direct Electrical Equivalents (1 NPN, 1 PNP Configuration)

PUMD2,165 (Nexperia, Active status)
DCX124EU-7-F (Diodes Incorporated, Active status)
DCX124EUQ-7-F (Diodes Incorporated, Active status, AEC-Q101 qualified)

Group 2: Functional Alternatives (2 NPN Pre-Biased Configuration)

DDC124EU-7-F (Diodes Incorporated, Active status)
MUN5212DW1T1G (onsemi, Active status)
NSVMUN5212DW1T1G (onsemi, Active status)

Parts in Group 2 contain dual NPN transistors instead of the mixed NPN/PNP configuration. These are suitable for applications requiring only NPN switching functionality and maintain all critical electrical parameters.

Parameter Comparison

Parameter	PUMD2/ZLZ	PUMD2,165	DCX124EU-7-F	DCX124EUQ-7-F	DDC124EU-7-F	MUN5212DW1T1G	NSVMUN5212DW1T1G
Manufacturer	Nexperia	Nexperia	Diodes Inc.	Diodes Inc.	Diodes Inc.	onsemi	onsemi
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Transistor Type	1 NPN, 1 PNP	1 NPN, 1 PNP	1 NPN, 1 PNP	1 NPN, 1 PNP	2 NPN	2 NPN	2 NPN
Ic (Max)	100 mA	100 mA	100 mA	100 mA	100 mA	100 mA	100 mA
Vce Breakdown (Max)	50 V	50 V	50 V	50 V	50 V	50 V	50 V
R1 (Base Resistor)	22 kOhms	22 kOhms	22 kOhms	22 kOhms	22 kOhms	22 kOhms	22 kOhms
R2 (Emitter-Base Resistor)	22 kOhms	22 kOhms	22 kOhms	22 kOhms	22 kOhms	22 kOhms	22 kOhms
hFE (Min)	60 @ 5mA, 5V	60 @ 5mA, 5V	56 @ 5mA, 5V	100 @ 1mA, 5V	56 @ 5mA, 5V	60 @ 5mA, 10V	60 @ 5mA, 10V
Vce Saturation (Max)	150 mV @ 500µA, 10mA	150 mV @ 500µA, 10mA	300 mV @ 500µA, 10mA	Not specified	300 mV @ 500µA, 10mA	250 mV @ 300µA, 10mA	250 mV @ 300µA, 10mA
Power (Max)	300 mW	300 mW	200 mW	200 mW	200 mW	250 mW	250 mW
Package	6-TSSOP	6-TSSOP	SOT-363	SOT-363	SOT-363	SC-88/SOT-363	SC-88/SOT-363
RoHS Status	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3
AEC-Q101	Yes	No	No	Yes	No	No	No

Engineering Selection Recommendations

For Direct Replacement (1 NPN, 1 PNP Configuration):

PUMD2,165 is the primary active equivalent from Nexperia. It maintains identical electrical specifications and internal resistor values while offering active product status and higher inventory availability (11,075 units). This part is suitable for all applications previously using PUMD2/ZLZ without circuit modification.

DCX124EU-7-F and DCX124EUQ-7-F from Diodes Incorporated provide functional equivalence with the same dual NPN/PNP configuration. DCX124EUQ-7-F includes AEC-Q101 automotive qualification, matching the original part's automotive-grade designation. Both parts operate within specified parameters, though maximum power dissipation is reduced to 200 mW and Vce saturation is higher at 300 mV. These parts are suitable for applications where the reduced power rating and higher saturation voltage are acceptable.

For Dual NPN Applications (2 NPN Configuration):

DDC124EU-7-F, MUN5212DW1T1G, and NSVMUN5212DW1T1G are suitable only for circuits requiring dual NPN transistor functionality. These parts are not direct replacements for applications requiring PNP transistor operation. MUN5212DW1T1G and NSVMUN5212DW1T1G offer the highest inventory availability (96,900 and 35,100 units respectively) and increased power rating of 250 mW.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and MSL 1 rating. For automotive applications requiring AEC-Q101 qualification, DCX124EUQ-7-F is the only substitute meeting this requirement alongside the original PUMD2/ZLZ specification.

Frequently Asked Questions (FAQ)

Q: Can PUMD2,165 be used as a direct replacement for PUMD2/ZLZ?

A: Yes. PUMD2,165 is an active equivalent from the same manufacturer with identical electrical specifications, internal resistor values, and package compatibility. The primary difference is product status (active versus obsolete) and packaging format (Tape & Reel).

Q: What is the difference between Group 1 and Group 2 substitutes?

A: Group 1 parts (PUMD2,165, DCX124EU-7-F, DCX124EUQ-7-F) contain one NPN and one PNP transistor, matching the original PUMD2/ZLZ configuration. Group 2 parts (DDC124EU-7-F, MUN5212DW1T1G, NSVMUN5212DW1T1G) contain two NPN transistors. Group 2 parts are suitable only for applications requiring dual NPN functionality and cannot replace circuits dependent on PNP transistor operation.

Q: Are there differences in saturation voltage between substitutes?

A: Yes. PUMD2/ZLZ and PUMD2,165 specify 150 mV maximum saturation voltage. DCX124EU-7-F and DDC124EU-7-F specify 300 mV. MUN5212DW1T1G and NSVMUN5212DW1T1G specify 250 mV at different bias conditions. Applications with tight saturation voltage requirements should verify compatibility with the substitute part's specification.

Q: Which substitute is recommended for automotive applications?

A: DCX124EUQ-7-F is the only substitute carrying AEC-Q101 automotive qualification, matching the original part's automotive-grade designation. For non-automotive applications, all active substitutes are suitable.

Q: What is the impact of reduced power rating in Diodes Incorporated parts?

A: DCX124EU-7-F and DCX124EUQ-7-F specify 200 mW maximum power dissipation compared to 300 mW for PUMD2/ZLZ. Applications operating near the original 300 mW limit require thermal analysis to confirm compatibility with the reduced rating.

Q: Are the package designations 6-TSSOP, SC-88, and SOT-363 interchangeable?

A: These designations refer to the same physical package format with identical pin configuration and footprint. Parts specified with any of these package designations are mechanically compatible on the same PCB layout.

Q: Which substitute offers the best inventory availability?

A: MUN5212DW1T1G offers the highest inventory with 96,900 units in stock. NSVMUN5212DW1T1G provides 35,100 units. PUMD2,165 offers 11,075 units. Inventory levels should be verified at time of procurement.

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