CMPTH10 BK RF Transistor NPN Equivalent & Substitute Parts

Part Overview

The CMPTH10 BK is an RF transistor NPN designed for UHF/VHF applications, manufactured by Central Semiconductor Corp. This surface mount device operates at 25V collector-emitter breakdown voltage with a transition frequency of 650MHz and maximum power dissipation of 350mW in a SOT-23 package. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing design support, maintenance, and production continuity.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	25	V
Frequency - Transition	650	MHz
Power - Max	350	mW
DC Current Gain (hFE) (Min) @ Ic, Vce	60 @ 4mA, 10V	—
Operating Temperature	-65 to 150	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the CMPTH10 BK is determined by the following critical parameters:

Primary Substitution Criteria:

Transistor Type: NPN (required match)
Voltage - Collector Emitter Breakdown (Max): 25V or higher (must support or exceed operating voltage)
Frequency - Transition: 650MHz or higher (must support or exceed frequency requirement)
Power - Max: 350mW or higher (must support or exceed power dissipation)
DC Current Gain (hFE): 60 or higher at specified test conditions
Mounting Type: Surface Mount (required match)
Package compatibility: SOT-23 or equivalent small-outline packages

Substitute Classification:

Direct Equivalent (Identical Parameters):

KST10MTF (onsemi): Matches all critical parameters including 25V, 650MHz, 350mW, and SOT-23-3 package. Active product status with high inventory availability.

Higher-Performance Substitutes (Enhanced Specifications):

BFR93AWH6327XTSA1 (Infineon): 12V rating, 6GHz frequency, 300mW power, SOT-323 package. Lower voltage rating but higher frequency capability.
BFP196WNH6327XTSA1 (Infineon): 12V rating, 7.5GHz frequency, 700mW power, SOT-343-4 package. Enhanced power and frequency performance.
BFP620H7764XTSA1 (Infineon): 2.8V rating, 65GHz frequency, 185mW power, SOT-343 package. Specialized for ultra-high frequency applications.
BFP720H6327XTSA1 (Infineon): 4.7V rating, 45GHz frequency, 100mW power, SOT-343 package. Specialized for high-frequency applications.

Parameter Comparison

Part Number	Manufacturer	Voltage - Collector Emitter Breakdown (Max) [V]	Frequency - Transition [MHz]	Power - Max [mW]	DC Current Gain (hFE) (Min) @ Ic, Vce	Package / Case	Product Status	Mounting Type
CMPTH10 BK	Central Semiconductor Corp	25	650	350	60 @ 4mA, 10V	SOT-23-3	Obsolete	Surface Mount
KST10MTF	onsemi	25	650	350	60 @ 4mA, 10V	SOT-23-3	Active	Surface Mount
BFR93AWH6327XTSA1	Infineon Technologies	12	6000	300	70 @ 30mA, 8V	SOT-323	Active	Surface Mount
BFP196WNH6327XTSA1	Infineon Technologies	12	7500	700	70 @ 50mA, 8V	SOT-343-4	Active	Surface Mount
BFP620H7764XTSA1	Infineon Technologies	2.8	65000	185	110 @ 50mA, 1.5V	SOT-343	Active	Surface Mount
BFP720H6327XTSA1	Infineon Technologies	4.7	45000	100	160 @ 13mA, 3V	SOT-343	Active	Surface Mount

Engineering Selection Recommendations

For Direct Replacement (Recommended Primary Choice):

KST10MTF is the optimal substitute for CMPTH10 BK. This part maintains identical electrical specifications (25V, 650MHz, 350mW, 60 hFE) and package configuration (SOT-23-3). The device is manufactured by onsemi, an established semiconductor supplier, and holds Active product status with substantial inventory availability (391,101 pieces). Both parts are ROHS3 compliant and carry identical ECCN and HTSUS classifications, ensuring regulatory and supply chain compatibility.

For Enhanced-Performance Applications:

When circuit design permits higher frequency operation or increased power dissipation, Infineon Technologies substitutes provide advanced capabilities:

BFP196WNH6327XTSA1 offers 7.5GHz frequency and 700mW power in an active product line, suitable for applications requiring higher performance margins.
BFR93AWH6327XTSA1 provides 6GHz frequency in a compact SOT-323 package with active status and high inventory (35,300 pieces).

For Specialized High-Frequency Applications:

BFP620H7764XTSA1 and BFP720H6327XTSA1 are designated for ultra-high frequency designs (65GHz and 45GHz respectively) where the CMPTH10 BK frequency capability is insufficient. These parts require circuit redesign and are not pin-compatible drop-in replacements.

Compliance and Availability:

All recommended substitutes maintain ROHS3 compliance, MSL 1 rating, and REACH unaffected status. KST10MTF provides the highest supply security with 391,101 pieces in stock. All substitutes carry EAR99 ECCN classification matching the original part.

Frequently Asked Questions (FAQ)

Q: Can KST10MTF directly replace CMPTH10 BK without circuit modification?

A: Yes. KST10MTF is a direct electrical and mechanical equivalent. Both devices share identical voltage (25V), frequency (650MHz), power (350mW), gain (60 hFE), and SOT-23-3 package specifications. No circuit redesign is required.

Q: What is the primary difference between KST10MTF and the Infineon substitutes?

A: KST10MTF maintains the original CMPTH10 BK specifications exactly. Infineon parts (BFR93AWH6327XTSA1, BFP196WNH6327XTSA1, BFP620H7764XTSA1, BFP720H6327XTSA1) offer enhanced frequency performance (6GHz to 65GHz) but operate at lower voltage ratings (2.8V to 12V). These are not direct replacements and require circuit evaluation.

Q: Why is CMPTH10 BK obsolete while KST10MTF is active?

A: CMPTH10 BK was discontinued by Central Semiconductor Corp. KST10MTF, manufactured by onsemi, represents the active equivalent product line. Both devices share identical specifications, making KST10MTF the recommended long-term supply source.

Q: Are all substitutes RoHS3 compliant?

A: Yes. CMPTH10 BK and all listed substitutes (KST10MTF, BFR93AWH6327XTSA1, BFP196WNH6327XTSA1, BFP620H7764XTSA1, BFP720H6327XTSA1) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: Can BFP620H7764XTSA1 or BFP720H6327XTSA1 be used in place of CMPTH10 BK?

A: These parts are not suitable as direct replacements. BFP620H7764XTSA1 operates at 2.8V maximum (below the 25V requirement) and BFP720H6327XTSA1 operates at 4.7V maximum. Both are designed for ultra-high frequency applications (45GHz and 65GHz) where the CMPTH10 BK 650MHz specification is excessive. Circuit redesign would be necessary.

Q: What is the inventory status for substitute parts?

A: KST10MTF has the highest availability with 391,101 pieces in stock. BFR93AWH6327XTSA1 has 35,300 pieces. BFP196WNH6327XTSA1 has 6,811 pieces. BFP720H6327XTSA1 has 3,115 pieces. BFP620H7764XTSA1 has 14,000 pieces. All are new original stock.

Q: Do all substitutes use the same packaging?

A: KST10MTF uses SOT-23-3 (identical to CMPTH10 BK). Infineon substitutes use SOT-323 or SOT-343 packages, which are physically different and require PCB layout modification. For drop-in replacement, KST10MTF is the only option.

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