MMS9014HE3-H-TP Equivalent & Substitute Parts

Part Overview

The MMS9014HE3-H-TP is an NPN bipolar junction transistor manufactured by Micro Commercial Co, designed for surface mount applications in the SOT-23 package. This component operates at a maximum collector current of 100 mA, collector-emitter breakdown voltage of 45 V, and maximum power dissipation of 200 mW. The device is qualified to AEC-Q101 automotive standards and maintains active product status. Substitute parts are identified to provide design flexibility, component availability alternatives, and supply chain redundancy while maintaining electrical and mechanical compatibility within specified parameter ranges.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) Max	100	mA
Voltage - Collector Emitter Breakdown (Max)	45	V
Power - Max	200	mW
Frequency - Transition	150	MHz
Operating Temperature Range	-55 to 150	°C
Package / Case	SOT-23-3	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the MMS9014HE3-H-TP is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Transistor Type: NPN
Current - Collector (Ic) Max: 100 mA
Voltage - Collector Emitter Breakdown (Max): 45 V
Power - Max: 200 mW
Package / Case: SOT-23-3
Mounting Type: Surface Mount
Operating Temperature Range: -55°C to 150°C
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Allowable Parameter Variations:

Frequency - Transition: Substitute parts operate at 100 MHz, which is lower than the main part's 150 MHz specification. This variation is acceptable for applications where the transition frequency requirement does not exceed 100 MHz.
Vce Saturation (Max): Substitute parts specify 500 mV @ 5 mA, 100 mA, compared to the main part's 300 mV @ 5 mA, 100 mA. This represents a higher saturation voltage and is acceptable for circuits tolerant of this parameter variance.
DC Current Gain (hFE): Substitute parts specify minimum hFE values at different measurement conditions (2 mA, 5V) compared to the main part (1 mA, 5V). Gain values range from 110 to 420 depending on the specific substitute variant.

All substitute parts are manufactured by Taiwan Semiconductor Corporation, maintain active product status, and comply with ROHS3 and REACH requirements.

Parameter Comparison

Parameter	MMS9014HE3-H-TP	BC847A RFG	BC847B RFG	BC847C RFG
Manufacturer	Micro Commercial Co	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation
Transistor Type	NPN	NPN	NPN	NPN
Current - Collector (Ic) Max	100 mA	100 mA	100 mA	100 mA
Voltage - Collector Emitter Breakdown (Max)	45 V	45 V	45 V	45 V
Vce Saturation (Max) @ Ib, Ic	300 mV @ 5 mA, 100 mA	500 mV @ 5 mA, 100 mA	500 mV @ 5 mA, 100 mA	500 mV @ 5 mA, 100 mA
Current - Collector Cutoff (Max)	100 nA	100 nA	100 nA	100 nA
DC Current Gain (hFE) Min	450 @ 1 mA, 5V	110 @ 2 mA, 5V	200 @ 2 mA, 5V	420 @ 2 mA, 5V
Power - Max	200 mW	200 mW	200 mW	200 mW
Frequency - Transition	150 MHz	100 MHz	100 MHz	100 MHz
Operating Temperature	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
Package / Case	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All three substitute parts—BC847A RFG, BC847B RFG, and BC847C RFG—are qualified alternatives to the MMS9014HE3-H-TP based on electrical and mechanical parameter compatibility. Selection among these options depends on specific application requirements:

BC847A RFG is suitable for applications where lower DC current gain (minimum 110 @ 2 mA, 5V) is acceptable and cost optimization is a priority.

BC847B RFG provides intermediate DC current gain characteristics (minimum 200 @ 2 mA, 5V) and represents a balanced option across the substitute range.

BC847C RFG delivers the highest DC current gain among substitutes (minimum 420 @ 2 mA, 5V), approaching the gain characteristics of the original MMS9014HE3-H-TP (450 @ 1 mA, 5V), and is recommended for applications sensitive to gain performance.

All substitute parts maintain compliance with ROHS3 and REACH requirements, operate across the full -55°C to 150°C temperature range, and are packaged in the identical SOT-23-3 surface mount configuration. The primary trade-off between the main part and substitutes is transition frequency (150 MHz versus 100 MHz) and Vce saturation voltage (300 mV versus 500 mV). Applications operating below 100 MHz and tolerant of higher saturation voltage are fully compatible with all substitute options.

Frequently Asked Questions (FAQ)

Q: Can BC847A RFG, BC847B RFG, or BC847C RFG be used as direct replacements for MMS9014HE3-H-TP in existing designs?

A: Yes, all three BC847 variants are direct pin-compatible replacements in the SOT-23-3 package. Electrical compatibility is confirmed across maximum collector current (100 mA), collector-emitter breakdown voltage (45 V), power dissipation (200 mW), and operating temperature range (-55°C to 150°C). Design validation is required only if the application operates at transition frequencies above 100 MHz or requires Vce saturation below 300 mV.

Q: What is the primary difference between BC847A RFG, BC847B RFG, and BC847C RFG?

A: The three variants differ in DC current gain (hFE) specifications. BC847A RFG specifies minimum 110 @ 2 mA, 5V; BC847B RFG specifies minimum 200 @ 2 mA, 5V; and BC847C RFG specifies minimum 420 @ 2 mA, 5V. All other electrical and mechanical parameters are identical. Selection is based on the gain requirement of the specific circuit application.

Q: Are there any compliance or certification differences between the main part and substitute parts?

A: No. All parts maintain ROHS3 compliance, REACH unaffected status, and identical moisture sensitivity level (MSL 1, Unlimited). The main part carries AEC-Q101 automotive qualification; substitute parts do not explicitly list this qualification in the provided data.

Q: What is the impact of the 50 MHz transition frequency difference between the main part and substitutes?

A: The MMS9014HE3-H-TP operates at 150 MHz transition frequency, while all BC847 variants operate at 100 MHz. For applications with signal frequencies or switching speeds below 100 MHz, this difference has no functional impact. Applications requiring operation above 100 MHz must retain the original MMS9014HE3-H-TP.

Q: How does the higher Vce saturation voltage of substitute parts affect circuit performance?

A: Substitute parts specify 500 mV Vce saturation compared to 300 mV for the main part. In switching applications, this results in approximately 200 mV higher voltage drop across the transistor in saturation. Circuits designed with adequate headroom and not dependent on minimal saturation voltage are unaffected. Applications requiring low saturation voltage for logic-level switching or power efficiency should retain the original part.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All substitute parts are supplied in Tape & Reel (TR) packaging in the SOT-23-3 surface mount configuration, identical to the main part. Moisture sensitivity level is MSL 1 (Unlimited) for all parts.

Q: Which substitute part most closely matches the performance of the original MMS9014HE3-H-TP?

A: BC847C RFG provides the closest DC current gain match, with minimum hFE of 420 @ 2 mA, 5V compared to the main part's 450 @ 1 mA, 5V. However, the measurement conditions differ (2 mA versus 1 mA), and transition frequency remains lower at 100 MHz. For applications prioritizing gain performance, BC847C RFG is the optimal substitute.

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