CMPT5401E TR Equivalent & Substitute Parts

Part Overview

The CMPT5401E TR is a Surface Mount PNP Bipolar Junction Transistor manufactured by Central Semiconductor Corp, designed for general-purpose switching and amplification applications. This device features a maximum collector current of 600 mA, collector-emitter breakdown voltage of 220 V, and maximum power dissipation of 350 mW in a compact SOT-23 package.

The CMPT5401E TR is classified as an Obsolete product. Locating equivalent substitute parts is necessary to support ongoing maintenance, repair, and production requirements for legacy systems and equipment utilizing this component.

Substiute Parts

CMPT5401E TR

Central Semiconductor CorpIn Stock: 960CMPT5401E TR Datasheet

Current PartRFQ

CMPT5401 TR PBFREE

Central Semiconductor CorpIn Stock: 34610CMPT5401 TR PBFREE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CMPT5401E TR is determined by strict equivalence across the following critical electrical and mechanical parameters:

Mandatory Equivalence Criteria:

1. Transistor Type: PNP configuration required for circuit compatibility
2. Package / Case: SOT-23-3 (TO-236-3, SC-59) form factor required for PCB layout compatibility
3. Mounting Type: Surface Mount required for assembly process compatibility
4. Current Rating: Maximum collector current of 600 mA or greater
5. Power Dissipation: Maximum power rating of 350 mW or greater
6. Operating Temperature Range: -65°C to 150°C (TJ) or wider range
7. Frequency - Transition: 300 MHz or greater for signal bandwidth compatibility

Voltage Consideration:

The CMPT5401E TR specifies a maximum collector-emitter breakdown voltage of 220 V. Substitute parts with lower voltage ratings (such as 150 V) may be used in applications where the actual operating voltage does not exceed the substitute part's rating. However, the substitute part's voltage specification must be verified against the actual circuit requirements before selection.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration:

The CMPT5401E TR is classified as Obsolete, while the CMPT5401 TR PBFREE is classified as Active. The Active status of the substitute part ensures continued availability and manufacturing support.

Compliance and Certification:

The CMPT5401 TR PBFREE carries RoHS3 Compliance certification, indicating conformance to current environmental and material restriction standards. Both parts maintain REACH Unaffected status and EAR99 export classification.

Packaging and Handling:

The CMPT5401 TR PBFREE is supplied in Tape & Reel (TR) packaging format, which is standard for automated assembly operations. Both parts maintain MSL 1 (Unlimited) moisture sensitivity rating, requiring standard handling procedures.

Parameter Deviations:

The CMPT5401 TR PBFREE exhibits two measurable deviations from the CMPT5401E TR specification:

1. Collector-emitter breakdown voltage is reduced from 220 V to 150 V
2. DC current gain (hFE) minimum is reduced from 100 to 60 at specified test conditions
3. Vce saturation voltage is increased from 150 mV to 500 mV at specified test conditions

These deviations must be evaluated against the specific circuit design requirements and operating conditions of the target application.

Frequently Asked Questions (FAQ)

Q: Can the CMPT5401 TR PBFREE directly replace the CMPT5401E TR in all applications?

A: Direct replacement is possible only when the circuit design does not require the higher voltage rating (220 V) of the original part. The lower collector-emitter breakdown voltage (150 V) of the substitute must be verified against the actual operating voltage in the target circuit. Additionally, the lower DC current gain and higher saturation voltage may affect circuit performance in gain-sensitive or switching applications.

Q: What is the significance of the "PBFREE" designation in the substitute part number?

A: The "PBFREE" designation indicates that the part is manufactured without lead (Pb) in the solder connections and component materials, in compliance with RoHS3 environmental standards. This is a manufacturing process designation and does not affect electrical performance or pin compatibility.

Q: Are the SOT-23 and TO-236-3 package designations interchangeable?

A: Yes. SOT-23, TO-236-3, and SC-59 are equivalent package designations for the same physical form factor. All three designations refer to a three-lead Surface Mount package with identical pin spacing, dimensions, and PCB footprint requirements.

Q: What is the impact of the reduced DC current gain (hFE) in the substitute part?

A: The CMPT5401 TR PBFREE specifies a minimum DC current gain of 60 compared to 100 for the CMPT5401E TR. In amplifier circuits, this reduction may result in lower voltage gain. In switching applications, this may require increased base drive current to achieve full saturation. Circuit simulation or testing is necessary to determine if this parameter change affects performance in the target application.

Q: How does the increased Vce saturation voltage affect circuit operation?

A: The CMPT5401 TR PBFREE exhibits a maximum saturation voltage of 500 mV compared to 150 mV for the CMPT5401E TR at the specified test conditions (5 mA base current, 50 mA collector current). In switching applications, this higher saturation voltage results in greater voltage drop across the transistor during the ON state, which may increase power dissipation and reduce output voltage swing. Circuit analysis is required to determine compatibility.

Q: Is the substitute part suitable for high-frequency applications?

A: Both parts specify identical transition frequency (fT) of 300 MHz, indicating equivalent high-frequency performance characteristics. The substitute part is suitable for applications requiring this frequency range.

Q: What are the storage and handling requirements for the CMPT5401 TR PBFREE?

A: Both parts maintain MSL 1 (Unlimited) moisture sensitivity rating. Standard ESD protection and dry storage conditions are recommended. The Tape & Reel packaging format of the substitute part is compatible with automated assembly equipment and standard component handling procedures.