PUMB3HX Equivalent & Substitute Parts

Part Overview

The PUMB3HX is a pre-biased dual PNP bipolar junction transistor (BJT) manufactured by Nexperia USA Inc. in a 6-TSSOP surface mount package. This component integrates two PNP transistors with internal base resistors, designed for switching and amplification applications requiring 50V collector-emitter breakdown voltage and 100mA maximum collector current.

The PUMB3HX has reached obsolete product status. Locating equivalent or substitute components is necessary to support ongoing production requirements, field repairs, and design continuity for applications currently utilizing this part number.

Key Parameters

Parameter	Value	Unit
Transistor Type	2 PNP Pre-Biased (Dual)	—
Current - Collector (Ic) (Max)	100	mA
Voltage - Collector Emitter Breakdown (Max)	50	V
Resistor - Base (R1)	4.7	kOhms
DC Current Gain (hFE) (Min) @ Ic, Vce	200 @ 1mA, 5V	—
Vce Saturation (Max) @ Ib, Ic	100 @ 500µA, 10mA	mV
Frequency - Transition	180	MHz
Power - Max	240	mW
Package / Case	6-TSSOP, SC-88, SOT-363	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the obsolete PUMB3HX is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Parameters (Must Match):

Transistor configuration: 2 PNP pre-biased dual configuration
Maximum collector current: 100mA
Collector-emitter breakdown voltage: 50V
Base resistor value (R1): 4.7kOhms
DC current gain (hFE): 200 minimum at 1mA, 5V
Saturation voltage (Vce): 100mV maximum at specified bias conditions
Transition frequency: 180MHz
Maximum power dissipation: 240mW
Current-collector cutoff: 100nA

Mechanical Parameters (Must Match):

Package type: 6-TSSOP / SC-88 / SOT-363
Mounting technology: Surface mount

Compliance Parameters:

RoHS3 compliance required
Moisture sensitivity level: 1 (Unlimited)

Substitute parts must satisfy all electrical specifications and mechanical constraints. The PUMB3H-QX meets these criteria while offering active product status and automotive-grade qualification.

Parameter Comparison

Parameter	PUMB3HX (Obsolete)	PUMB3H-QX (Active)	Match
Transistor Type	2 PNP Pre-Biased (Dual)	2 PNP - Pre-Biased (Dual)	Yes
Current - Collector (Ic) (Max)	100mA	100mA	Yes
Voltage - Collector Emitter Breakdown (Max)	50V	50V	Yes
Resistor - Base (R1)	4.7kOhms	4.7kOhms	Yes
DC Current Gain (hFE) (Min) @ Ic, Vce	200 @ 1mA, 5V	200 @ 1mA, 5V	Yes
Vce Saturation (Max) @ Ib, Ic	100mV @ 500µA, 10mA	100mV @ 500µA, 10mA	Yes
Current - Collector Cutoff (Max)	100nA	100nA	Yes
Frequency - Transition	180MHz	180MHz	Yes
Power - Max	240mW	240mW	Yes
Package / Case	6-TSSOP, SC-88, SOT-363	6-TSSOP, SC-88, SOT-363	Yes
Mounting Type	Surface Mount	Surface Mount	Yes
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Yes
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Yes
Product Status	Obsolete	Active	Upgrade

Engineering Selection Recommendations

The PUMB3H-QX is the direct substitute for the obsolete PUMB3HX. All electrical parameters, mechanical specifications, and compliance certifications are identical. The PUMB3H-QX offers the following advantages:

Product Status: The PUMB3H-QX maintains active product status with ongoing manufacturer support and availability, eliminating supply chain risk associated with obsolete components.

Compliance & Qualification: The PUMB3H-QX carries AEC-Q101 automotive qualification and REACH unaffected status, providing enhanced traceability and regulatory compliance for applications requiring automotive-grade components.

Functional Equivalence: Electrical performance is fully equivalent across all specified parameters. Direct pin-for-pin and functional replacement is supported without circuit modification.

Package Compatibility: Both parts utilize identical 6-TSSOP surface mount packaging, ensuring mechanical compatibility with existing PCB layouts and assembly processes.

For applications currently using PUMB3HX, transition to PUMB3H-QX is supported without design changes or performance degradation.

Frequently Asked Questions (FAQ)

Q: Can PUMB3H-QX be used as a direct replacement for PUMB3HX in existing designs?

A: Yes. The PUMB3H-QX is electrically and mechanically equivalent to the PUMB3HX across all specified parameters. No circuit modifications or PCB layout changes are required for direct substitution.

Q: Are the package dimensions identical between PUMB3HX and PUMB3H-QX?

A: Yes. Both parts use the 6-TSSOP surface mount package (also designated SC-88 or SOT-363). Pin configuration, lead spacing, and overall package footprint are identical.

Q: What is the primary difference between PUMB3HX and PUMB3H-QX?

A: The PUMB3HX is obsolete, while the PUMB3H-QX is an active product. The PUMB3H-QX includes AEC-Q101 automotive qualification and REACH compliance documentation. All electrical and mechanical specifications are identical.

Q: Does the PUMB3H-QX meet RoHS requirements?

A: Yes. The PUMB3H-QX is ROHS3 compliant and carries REACH unaffected status, meeting environmental and regulatory requirements for both commercial and automotive applications.

Q: Are there any differences in the internal base resistor values?

A: No. Both PUMB3HX and PUMB3H-QX feature identical internal base resistor (R1) values of 4.7kOhms. The emitter-base resistor (R2) is not specified for either part.

Q: What is the moisture sensitivity level for PUMB3H-QX?

A: The PUMB3H-QX has a moisture sensitivity level (MSL) of 1, indicating unlimited shelf life without moisture bake requirements prior to soldering.

Q: Can PUMB3H-QX be used in automotive applications?

A: Yes. The PUMB3H-QX carries AEC-Q101 qualification, making it suitable for automotive-grade applications requiring qualified components.

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