PUMB9/ZLH Pre-Biased Bipolar Transistor Equivalent & Substitute Parts

Part Overview

The PUMB9/ZLH is a pre-biased dual PNP bipolar transistor (BJT) manufactured by Nexperia USA Inc. in a 6-TSSOP surface mount package. This component integrates two PNP transistors with internal biasing resistors, designed for automotive-grade applications requiring compact switching solutions. The part is currently classified as obsolete, necessitating identification of functionally equivalent active alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

PUMB9/ZLH

Nexperia USA Inc.In Stock: 907PUMB9/ZLH Datasheet

Current PartRFQ

PUMB9,125

Nexperia USA Inc.In Stock: 1034PUMB9,125 Datasheet

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MUN5114DW1T1G

onsemiIn Stock: 21466MUN5114DW1T1G Datasheet

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SMUN5114DW1T1G

onsemiIn Stock: 883SMUN5114DW1T1G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PUMB9/ZLH is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Dual PNP pre-biased transistor configuration
• Maximum collector current: 100mA
• Collector-emitter breakdown voltage: 50V
• Internal base resistor (R1): 10kOhms
• Internal emitter-base resistor (R2): 47kOhms
• Surface mount package compatibility: 6-TSSOP, SC-88, SOT-363

Mechanical Equivalence Criteria:

• Surface mount technology
• 6-pin package footprint compatibility
• RoHS3 compliance
• Automotive-grade qualification

Substitute parts must maintain all specified electrical parameters within the defined tolerances and operate within the same package envelope. Variations in secondary parameters such as DC current gain specifications, saturation voltage, or power dissipation ratings do not preclude substitution provided the part remains functionally suitable for the application's operating conditions.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: PUMB9,125

The PUMB9,125 manufactured by Nexperia USA Inc. is the direct functional equivalent of the obsolete PUMB9/ZLH. This part maintains identical electrical specifications including collector current (100mA), breakdown voltage (50V), internal resistor values (R1: 10kOhms, R2: 47kOhms), DC current gain (100 @ 5mA, 5V), saturation voltage (100mV @ 250µA, 5mA), and transition frequency (180MHz). The PUMB9,125 is currently in active production status with automotive-grade qualification (AEC-Q100) and ROHS3 compliance. The primary distinction is packaging format: PUMB9,125 is supplied in Tape & Reel configuration versus the original part's unspecified packaging. Both parts share identical 6-TSSOP package geometry and pinout compatibility.

Secondary Substitutes: MUN5114DW1T1G and SMUN5114DW1T1G

The onsemi MUN5114DW1T1G and SMUN5114DW1T1G are functionally compatible alternatives manufactured by a different supplier. Both parts maintain the core electrical requirements: dual PNP pre-biased configuration, 100mA collector current, 50V breakdown voltage, and identical internal resistor values (R1: 10kOhms, R2: 47kOhms). These parts are currently in active production status with ROHS3 compliance.

Operational differences exist in secondary electrical parameters. The onsemi variants specify DC current gain of 80 @ 5mA, 10V (versus 100 @ 5mA, 5V for the PUMB9/ZLH), saturation voltage of 250mV @ 300µA, 10mA (versus 100mV @ 250µA, 5mA), and collector cutoff current of 500nA (versus 1µA). Transition frequency is not specified for the onsemi parts. Power dissipation ratings are reduced: MUN5114DW1T1G at 250mW and SMUN5114DW1T1G at 187mW, compared to 300mW for the original part.

Selection between MUN5114DW1T1G and SMUN5114DW1T1G depends on thermal design requirements. The SMUN5114DW1T1G with lower power rating (187mW) is suitable for applications with reduced thermal headroom, while MUN5114DW1T1G (250mW) provides intermediate thermal capability.

Frequently Asked Questions (FAQ)

Q: Can PUMB9,125 be used as a direct replacement for PUMB9/ZLH in existing designs?

A: Yes. The PUMB9,125 maintains identical electrical specifications and package geometry. The only difference is supply format (Tape & Reel packaging). Both parts are pin-compatible and functionally equivalent for all circuit applications.

Q: What are the key differences between Nexperia and onsemi substitute options?

A: The Nexperia PUMB9,125 provides exact electrical specification matching to the original PUMB9/ZLH. The onsemi MUN5114DW1T1G and SMUN5114DW1T1G variants maintain core functionality but operate with different DC current gain specifications (80 versus 100), higher saturation voltage (250mV versus 100mV), and lower power dissipation ratings. These differences do not affect substitution validity provided the application's operating conditions remain within the specified limits of the substitute part.

Q: Are the onsemi MUN5114DW1T1G and SMUN5114DW1T1G interchangeable with each other?

A: Both onsemi parts share identical electrical specifications and package geometry. The distinction is power dissipation rating: MUN5114DW1T1G at 250mW and SMUN5114DW1T1G at 187mW. Selection depends on thermal design requirements. Both are functionally interchangeable in applications where power dissipation remains below 187mW.

Q: Do all substitute parts meet automotive qualification requirements?

A: The Nexperia PUMB9,125 carries AEC-Q100 automotive qualification. The onsemi MUN5114DW1T1G and SMUN5114DW1T1G do not specify automotive qualification in the provided data. For applications requiring automotive-grade components, PUMB9,125 is the recommended selection.

Q: What is the significance of the internal resistor values (R1: 10kOhms, R2: 47kOhms)?

A: These internal resistors define the pre-biasing network of the dual transistor. All substitute parts maintain identical resistor values, ensuring equivalent switching behavior and biasing characteristics. This parameter is critical for substitution validity.

Q: Can these parts be used in high-frequency applications?

A: The PUMB9/ZLH and PUMB9,125 specify transition frequency of 180MHz. The onsemi variants do not specify transition frequency. For applications requiring confirmed high-frequency operation above 100MHz, the Nexperia PUMB9,125 is the appropriate selection.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (PUMB9,125, MUN5114DW1T1G, SMUN5114DW1T1G) are ROHS3 compliant and REACH unaffected.

Q: What is the difference between SC-88 and SOT-363 package designations?

A: SC-88 and SOT-363 are equivalent package designations for the same 6-pin surface mount package. All substitute parts are compatible with existing PCB layouts designed for the PUMB9/ZLH 6-TSSOP package.