MRF317 Equivalent & Substitute Parts

Part Overview

The MRF317 is an RF transistor NPN type rated for 35V collector-emitter breakdown voltage with a maximum collector current of 12A and 100W power dissipation. This chassis mount device operates in the 316-01 package style and is classified as Active product status. The MRF317 is manufactured by MACOM Technology Solutions and is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Substitute parts become necessary when the MRF317 reaches end-of-life status, when inventory becomes unavailable, or when design requirements necessitate alternative electrical or mechanical characteristics within compatible parameter ranges.

Key Parameters

Parameter	MRF317 Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	35V	V
Current - Collector (Ic) (Max)	12A	A
Power - Max	100W	W
Gain	10dB	dB
DC Current Gain (hFE) (Min) @ Ic, Vce	10 @ 5A, 5V	—
Mounting Type	Chassis Mount	—
Package / Case	316-01	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MRF317 is determined by the following critical parameters:

Primary Substitution Criteria:

Transistor Type: NPN (required match)
Voltage - Collector Emitter Breakdown (Max): Must equal or exceed 35V
Current - Collector (Ic) (Max): Must equal or exceed 12A
Power - Max: Must equal or exceed 100W
Mounting Type: Chassis Mount (required match)
Package / Case: 316-01 (required match)
RoHS Status: ROHS3 Compliant (required match)
Moisture Sensitivity Level (MSL): 1 (Unlimited) (required match)

The substitute parts listed in the MRF317 specification (2SC5646A-TL-H, BFP650H6327XTSA1, BFP196WH6327XTSA1, BFQ19SH6327XTSA1, BFR843EL3E6327XTSA1) are provided by the manufacturer. However, analysis of the provided electrical and mechanical parameters reveals significant deviations from the primary substitution criteria. These parts feature surface mount packaging, substantially lower voltage ratings, reduced current handling capabilities, and lower power dissipation compared to the MRF317 specifications.

Parameter Comparison

Parameter	MRF317	2SC5646A-TL-H	BFP196WH6327XTSA1	BFP650H6327XTSA1	BFQ19SH6327XTSA1	BFR843EL3E6327XTSA1
Transistor Type	NPN	NPN	NPN	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	35V	4V	12V	4.5V	15V	2.6V
Current - Collector (Ic) (Max)	12A	30mA	150mA	150mA	120mA	55mA
Power - Max	100W	100mW	700mW	500mW	1W	125mW
Gain	10dB	9.5dB ~ 10.5dB @ 2GHz	12.5dB ~ 19dB	10.5dB ~ 21.5dB	7dB	25.5dB
DC Current Gain (hFE) (Min) @ Ic, Vce	10 @ 5A, 5V	100 @ 5mA, 1V	70 @ 50mA, 8V	110 @ 80mA, 3V	70 @ 70mA, 8V	—
Mounting Type	Chassis Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	316-01	SC-81	SC-82A, SOT-343	SC-82A, SOT-343	TO-243AA	3-XFDFN
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Based on the provided electrical and mechanical parameters, the listed substitute parts do not meet the primary substitution criteria for direct replacement of the MRF317 in applications requiring its specified performance envelope.

Compliance Status: All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) rating, matching the MRF317 environmental and regulatory requirements.

Product Status Considerations:

MRF317: Active status
2SC5646A-TL-H: Obsolete status
BFP196WH6327XTSA1: Active status
BFP650H6327XTSA1: Active status
BFQ19SH6327XTSA1: Active status
BFR843EL3E6327XTSA1: Active status

The selection of substitute parts must account for significant deviations in voltage rating, current handling, power dissipation, and mounting configuration. Applications requiring the full 35V, 12A, 100W performance specification of the MRF317 cannot be satisfied by the listed alternatives without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can the 2SC5646A-TL-H directly replace the MRF317?

A: No. The 2SC5646A-TL-H operates at maximum 4V collector-emitter breakdown voltage compared to the MRF317's 35V rating. Maximum collector current is 30mA versus 12A for the MRF317. Power dissipation is 100mW versus 100W. Mounting type differs (surface mount versus chassis mount). Package configuration is incompatible (SC-81 versus 316-01).

Q: What are the key electrical differences between the MRF317 and BFP196WH6327XTSA1?

A: The BFP196WH6327XTSA1 has a maximum collector-emitter breakdown voltage of 12V (versus 35V), maximum collector current of 150mA (versus 12A), and maximum power dissipation of 700mW (versus 100W). The BFP196WH6327XTSA1 is surface mount in SOT-343 package, while the MRF317 is chassis mount in 316-01 package.

Q: Why do all substitute parts use surface mount packaging?

A: The substitute parts listed are optimized for high-frequency RF applications at lower power levels and voltage ratings. Surface mount packaging is standard for these performance classes. The MRF317's chassis mount configuration is specific to higher power dissipation requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) rating, matching the MRF317's environmental compliance status.

Q: What is the product status of the substitute parts?

A: Five of the six substitute parts maintain Active product status (BFP196WH6327XTSA1, BFP650H6327XTSA1, BFQ19SH6327XTSA1, BFR843EL3E6327XTSA1). The 2SC5646A-TL-H is classified as Obsolete.

Q: Can the BFQ19SH6327XTSA1 handle the MRF317's power requirements?

A: No. The BFQ19SH6327XTSA1 is rated for maximum 1W power dissipation compared to the MRF317's 100W rating. Maximum collector current is 120mA versus 12A. Maximum collector-emitter breakdown voltage is 15V versus 35V.

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