CMPTH10 TR Equivalent & Substitute Parts Reference

Part Overview

The CMPTH10 TR is an RF transistor manufactured by Central Semiconductor Corp, classified as an NPN bipolar junction transistor (BJT) designed for UHF/VHF applications. This component operates at a transition frequency of 650MHz with a maximum power dissipation of 350mW in a surface mount SOT-23 package. The part is currently listed as obsolete, making identification of functionally equivalent alternatives essential for design continuity and procurement planning. Substitute parts must maintain compatibility across electrical specifications, mechanical packaging, and thermal operating ranges to ensure direct replacement capability.

Substiute Parts

CMPTH10 TR

Central Semiconductor CorpIn Stock: 921CMPTH10 TR Datasheet

Current PartRFQ

KST10MTF

onsemiIn Stock: 391133KST10MTF Datasheet

DirectRFQ

2SC4713KT146R

Rohm SemiconductorIn Stock: 17872SC4713KT146R Datasheet

MFR RecommendedRFQ

HFA3134IHZ96

IntersilIn Stock: 19872HFA3134IHZ96 Datasheet

MFR RecommendedRFQ

MAX2601ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2334MAX2601ESA+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CMPTH10 TR is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

• Transistor Type: NPN configuration required
• Voltage - Collector Emitter Breakdown (Max): Minimum 25V
• Frequency - Transition: Minimum 650MHz
• Power - Max: Minimum 350mW
• DC Current Gain (hFE): Minimum 60 @ specified operating point
• Package / Case: SOT-23-3 or equivalent mechanical footprint
• Mounting Type: Surface Mount
• Moisture Sensitivity Level: MSL 1 or better

Grouping Logic:

Group 1 - Direct Electrical & Mechanical Equivalents: Parts meeting all primary criteria with identical or superior electrical specifications and matching SOT-23-3 packaging. These parts provide pin-for-pin replacement capability.

Group 2 - Electrical Equivalents with Package Variations: Parts meeting electrical criteria but with different surface mount package designations (SMT3, 6-SOT, 8-SOIC-EP). These require PCB layout verification before substitution.

Group 3 - Performance-Enhanced Alternatives: Parts exceeding primary specifications in frequency, power, or gain characteristics. These provide functional replacement with improved performance margins but require circuit validation.

Parameter Comparison

Engineering Selection Recommendations

KST10MTF (onsemi) - Recommended Primary Substitute

The KST10MTF represents the optimal substitute for the obsolete CMPTH10 TR. This part maintains identical electrical specifications across all critical parameters: 25V collector-emitter breakdown voltage, 650MHz transition frequency, 350mW maximum power dissipation, and 60 minimum DC current gain at the specified operating point. The package designation (SOT-23-3) provides direct mechanical compatibility with the original component. The part is currently in active production status with substantial inventory availability (391,101 pieces). RoHS3 compliance and MSL 1 rating ensure environmental and moisture handling compatibility. This substitution requires no circuit modifications and provides pin-for-pin replacement capability.

2SC4713KT146R (Rohm Semiconductor) - Conditional Substitute

The 2SC4713KT146R offers electrical performance enhancement with 800MHz transition frequency and higher DC current gain (180 @ 5mA, 5V). However, this part operates at reduced voltage ratings (6V maximum collector-emitter breakdown) and lower power dissipation (200mW), making it unsuitable for applications requiring the full 25V and 350mW specifications of the original component. This part is applicable only in circuits where voltage and power requirements are lower than the original design specifications. The SMT3 package designation requires PCB layout verification for mechanical compatibility.

HFA3134IHZ96 (Intersil) - Limited Compatibility

The HFA3134IHZ96 is a dual NPN transistor configuration (2 NPN) with significantly enhanced frequency performance (8.5GHz transition frequency) and lower voltage rating (9V maximum). The 6-SOT package differs from the original SOT-23-3 footprint, requiring PCB redesign. This part is applicable only in applications requiring dual transistor functionality and operating within 9V voltage constraints. The reduced voltage specification disqualifies this part for direct substitution in circuits designed for 25V operation.

MAX2601ESA+ (Analog Devices Inc./Maxim Integrated) - Performance-Enhanced Alternative

The MAX2601ESA+ provides substantial performance enhancement with 1GHz transition frequency, 6.4W maximum power dissipation, and 1.2A maximum collector current. The 15V maximum collector-emitter breakdown voltage is lower than the original 25V specification. The 8-SOIC-EP package represents a significant departure from the original SOT-23-3 footprint, requiring complete PCB layout redesign. This part is applicable only in applications where enhanced power handling and frequency performance are required and voltage specifications can be accommodated within 15V limits.

Compliance & Certification Status

All recommended active substitutes (KST10MTF, 2SC4713KT146R, HFA3134IHZ96, MAX2601ESA+) maintain RoHS3 compliance and EAR99 export classification consistent with the original component. MSL 1 rating is maintained across primary substitutes, ensuring compatibility with standard moisture handling procedures.

Frequently Asked Questions (FAQ)

Q1: Can the KST10MTF be used as a direct replacement for the CMPTH10 TR without circuit modifications?

A: Yes. The KST10MTF maintains identical electrical specifications (25V, 650MHz, 350mW, 60 hFE minimum) and SOT-23-3 package compatibility. This part provides pin-for-pin replacement capability without requiring circuit design changes.

Q2: Why is the 2SC4713KT146R listed as a substitute if it has lower voltage and power ratings?

A: The 2SC4713KT146R is listed as a manufacturer-recommended alternative for applications where circuit voltage and power requirements are lower than the original CMPTH10 TR specifications. It is not suitable for direct replacement in designs requiring 25V operation or 350mW power dissipation. Substitution requires circuit validation to confirm voltage and power margins are within the 2SC4713KT146R limits.

Q3: What is the significance of the HFA3134IHZ96 being a dual NPN configuration?

A: The HFA3134IHZ96 contains two independent NPN transistors in a single 6-SOT package. This configuration is applicable only in applications requiring dual transistor functionality. For single-transistor applications, this part introduces unnecessary complexity and requires PCB redesign. The 9V voltage rating also limits applicability to lower-voltage circuits.

Q4: Is the MAX2601ESA+ suitable for direct substitution in all CMPTH10 TR applications?

A: No. While the MAX2601ESA+ offers superior frequency performance (1GHz) and power handling (6.4W), the 15V maximum collector-emitter breakdown voltage is lower than the original 25V specification. Additionally, the 8-SOIC-EP package requires complete PCB layout redesign. This part is applicable only in applications where enhanced performance is required and voltage specifications can be accommodated within 15V limits.

Q5: What packaging considerations apply when substituting the CMPTH10 TR?

A: The KST10MTF maintains the original SOT-23-3 package footprint and requires no PCB layout changes. The 2SC4713KT146R uses SMT3 packaging, which differs from SOT-23-3 and requires PCB verification. The HFA3134IHZ96 (6-SOT) and MAX2601ESA+ (8-SOIC-EP) represent significant package departures requiring complete PCB redesign. Package compatibility must be verified before substitution.

Q6: Are all substitute parts RoHS3 compliant?

A: Yes. All active substitute parts (KST10MTF, 2SC4713KT146R, HFA3134IHZ96, MAX2601ESA+) maintain RoHS3 compliance. The original CMPTH10 TR is obsolete and compliance status is not specified. All substitutes are suitable for applications requiring RoHS3 certification.

Q7: What is the MSL rating significance for these RF transistors?

A: MSL 1 (Unlimited) rating indicates these components have unlimited shelf life and require no special moisture handling procedures beyond standard storage conditions. The KST10MTF, 2SC4713KT146R, and MAX2601ESA+ all maintain MSL 1 rating, ensuring compatibility with standard manufacturing and storage protocols.

Q8: Which substitute part offers the best inventory availability?

A: The KST10MTF offers the highest inventory availability with 391,101 pieces in stock, compared to 1,745 pieces for 2SC4713KT146R, 19,840 pieces for HFA3134IHZ96, and 2,300 pieces for MAX2601ESA+. Inventory levels support immediate procurement for the KST10MTF.

Q9: Can frequency performance differences between substitutes affect circuit operation?

A: Yes. The original CMPTH10 TR operates at 650MHz transition frequency. Substitutes with higher transition frequencies (2SC4713KT146R at 800MHz, HFA3134IHZ96 at 8.5GHz, MAX2601ESA+ at 1GHz) may exhibit different high-frequency characteristics. Circuit validation is required to confirm performance compatibility, particularly in applications operating near the original 650MHz specification.

Q10: What export classification applies to these RF transistors?

A: All parts maintain EAR99 export classification, consistent with the original CMPTH10 TR. This classification applies to RF transistors not subject to specific export controls. No additional export documentation is required for standard commercial applications.