PMST6429,115 Equivalent & Substitute Parts

Part Overview

The PMST6429,115 is an NPN bipolar junction transistor manufactured by Nexperia USA Inc., designed for surface mount applications in the SOT-323 package. This component operates at a maximum collector current of 100 mA with a collector-emitter breakdown voltage of 45 V and a transition frequency of 700 MHz. The device is rated for automotive applications with AEC-Q101 qualification and carries an active product status. Substitute parts are identified based on matching electrical characteristics, mechanical compatibility, and regulatory compliance to support design flexibility and supply chain continuity.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) Max	100	mA
Voltage - Collector Emitter Breakdown (Max)	45	V
Vce Saturation (Max) @ Ib, Ic	600 mV @ 5 mA, 100 mA	—
Power - Max	200	mW
Frequency - Transition	700	MHz
Operating Temperature (TJ)	150	°C
Package / Case	SC-70, SOT-323	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Grade	Automotive	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitute parts for the PMST6429,115 are grouped into two categories based on electrical and mechanical compatibility:

Category 1: Direct Electrical Equivalents (100 mA Collector Current) These parts maintain the same maximum collector current specification of 100 mA, identical collector-emitter breakdown voltage of 45 V, and matching saturation voltage characteristics. All parts in this category are housed in the SOT-323 package and support surface mount assembly. Substitutes include BC847AW RFG, BC847AW-7-F, BC847AWT1G, BC847BW RFG, BC847BW-7-F, BC847BWT1G, and BC847CW RFG.

Category 2: Higher Current Capability (500 mA Collector Current) These parts exceed the collector current specification at 500 mA while maintaining the same 45 V breakdown voltage and 200 mW power rating. These substitutes are suitable for applications where higher current capacity provides design margin. Substitutes include BC817-16W-7, BC817-25W-7, and BC817-40W-7.

Key Parameters Determining Substitution:

Transistor Type: NPN
Collector-Emitter Breakdown Voltage: 45 V
Package: SOT-323 (SC-70)
Mounting Type: Surface Mount
Power Rating: 200 mW
RoHS Compliance: ROHS3 Compliant

Parameter Comparison

Part Number	Manufacturer	Ic (Max) mA	Vce(br) V	Vce Sat (Max) mV	Power (Max) mW	Frequency MHz	Temp Range °C	hFE (Min)	Package
PMST6429,115	Nexperia USA Inc.	100	45	600	200	700	—	500	SOT-323
BC847AW RFG	Taiwan Semiconductor Corporation	100	45	600	200	100	-55 to 150	110	SOT-323
BC847AW-7-F	Diodes Incorporated	100	45	600	200	300	-65 to 150	110	SOT-323
BC847AWT1G	onsemi	100	45	600	150	100	-55 to 150	110	SOT-323
BC847BW RFG	Taiwan Semiconductor Corporation	100	45	600	200	100	-55 to 150	200	SOT-323
BC847BW-7-F	Diodes Incorporated	100	45	600	200	300	-65 to 150	200	SOT-323
BC847BWT1G	onsemi	100	45	600	150	100	-55 to 150	200	SOT-323
BC847CW RFG	Taiwan Semiconductor Corporation	100	45	600	200	100	-55 to 150	420	SOT-323
BC817-16W-7	Diodes Incorporated	500	45	700	200	100	-65 to 150	100	SOT-323
BC817-25W-7	Diodes Incorporated	500	45	700	200	100	-65 to 150	160	SOT-323
BC817-40W-7	Diodes Incorporated	500	45	700	200	100	-65 to 150	250	SOT-323

Engineering Selection Recommendations

For Direct Replacement (100 mA Applications): BC847AW-7-F and BC847BW-7-F from Diodes Incorporated are suitable direct replacements. Both maintain 100 mA collector current, 45 V breakdown voltage, and 200 mW power dissipation. These parts offer extended temperature range (-65°C to 150°C) and higher transition frequency (300 MHz) compared to the PMST6429,115. All substitute parts carry ROHS3 compliance and maintain MSL 1 (Unlimited) moisture sensitivity rating.

For Higher Current Margin (500 mA Applications): BC817-16W-7, BC817-25W-7, and BC817-40W-7 from Diodes Incorporated provide five times the collector current capacity while maintaining the same 45 V breakdown voltage and 200 mW power rating. These parts are suitable for applications requiring design margin or where collector current may approach the 100 mA limit of the original part. All three variants are ROHS3 compliant and available in extended temperature range (-65°C to 150°C).

Compliance Considerations: All substitute parts listed are ROHS3 compliant, REACH unaffected, and carry MSL 1 rating. The PMST6429,115 carries automotive grade qualification (AEC-Q101). Substitute parts from onsemi (BC847AWT1G, BC847BWT1G) and Taiwan Semiconductor Corporation (BC847 series) are active products with established supply availability. Diodes Incorporated BC817 and BC847 series parts demonstrate high inventory levels, supporting supply chain reliability.

Frequently Asked Questions (FAQ)

Q: Can BC817 series parts (500 mA) be used in place of PMST6429,115 (100 mA)? A: Yes. BC817-16W-7, BC817-25W-7, and BC817-40W-7 maintain the same 45 V breakdown voltage, 200 mW power rating, and SOT-323 package. The higher collector current rating (500 mA) does not prevent operation in 100 mA applications. Circuit design must account for differences in saturation voltage (700 mV vs. 600 mV) and DC current gain variation.

Q: What is the difference between BC847AW-7-F and BC847BW-7-F? A: Both parts are manufactured by Diodes Incorporated in SOT-323 package with identical electrical specifications except for DC current gain (hFE). BC847AW-7-F specifies minimum hFE of 110 at 2 mA, 5 V. BC847BW-7-F specifies minimum hFE of 200 at 2 mA, 5 V. Selection depends on circuit requirements for current gain.

Q: Are onsemi BC847AWT1G and BC847BWT1G suitable replacements? A: Yes. Both parts maintain 100 mA collector current, 45 V breakdown voltage, and SOT-323 package. Power rating is 150 mW (versus 200 mW for PMST6429,115). These parts are suitable for applications where 150 mW power dissipation meets design requirements. Temperature range is -55°C to 150°C.

Q: What packaging options are available for substitute parts? A: All substitute parts are available in SOT-323 (SC-70) surface mount package, matching the PMST6429,115 mechanical footprint. Packaging formats include Tape & Reel (TR) and Cut Tape (CT) with Digi-Reel options. Verify packaging format with supplier for assembly compatibility.

Q: Do all substitute parts meet automotive qualification requirements? A: The PMST6429,115 carries AEC-Q101 automotive qualification. Substitute parts listed are active products with ROHS3 compliance and MSL 1 rating. Automotive qualification status varies by manufacturer. Verify AEC-Q101 certification with supplier if automotive application requires this qualification.

Q: How does transition frequency affect substitution? A: PMST6429,115 specifies 700 MHz transition frequency. BC847 series substitutes specify 100-300 MHz. BC817 series specifies 100 MHz. Lower transition frequency does not prevent substitution in DC or low-frequency applications. High-frequency applications (approaching 700 MHz) require evaluation of substitute frequency specifications.

Q: What is the significance of DC current gain (hFE) variation among substitutes? A: DC current gain ranges from 110 (BC847A variants) to 420 (BC847C variants). Applications using transistors in saturation mode are less sensitive to hFE variation. Linear amplifier circuits may require hFE matching. Select substitute based on circuit topology and gain requirements.

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