2SB07790RL Equivalent & Substitute Parts

Part Overview

The 2SB07790RL is a PNP bipolar junction transistor manufactured by Panasonic Electronic Components, rated for 20V collector-emitter breakdown voltage and 500mA maximum collector current. This device is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part is housed in a Surface Mount Mini3-G1 package (TO-236-3/SOT-23-3 footprint) and operates at a maximum junction temperature of 150°C with 200mW power dissipation capability.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Collector Current (Max)	500	mA
Collector-Emitter Breakdown Voltage (Max)	20	V
Power Dissipation (Max)	200	mW
Transition Frequency	150	MHz
Operating Temperature (Max)	150	°C
Package Type	TO-236-3 / SOT-23-3	Surface Mount
Vce Saturation @ 50mA, 500mA	400	mV
DC Current Gain (hFE) @ 500mA, 2V	130	Min

Substitute Part Grouping Explanation

Substitution of the 2SB07790RL is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor type must be PNP
Collector-emitter breakdown voltage must be ≥20V
Maximum collector current must be ≥500mA
Package must be TO-236-3 / SOT-23-3 (Surface Mount)
Operating temperature range must support 150°C maximum junction temperature

Secondary Compatibility Factors:

Power dissipation capability
Transition frequency
Vce saturation characteristics
DC current gain (hFE)
Product status (Active preferred for long-term availability)

The substitute parts are grouped into two categories based on their electrical characteristics:

Group A (Direct Electrical Equivalents): Parts with 20V breakdown voltage and 500mA collector current rating, matching the original specification envelope.

Group B (Enhanced Specification Alternatives): Parts with 25V breakdown voltage or higher collector current ratings, providing superior performance margins while maintaining backward compatibility within the 20V/500mA operating window.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) mA	Vce(BR) Max V	Power Max mW	fT MHz	Vce Sat @ 50mA, 500mA mV	hFE Min @ Ic, Vce	Status	Package
2SB07790RL	Panasonic	500	20	200	150	400	130 @ 500mA, 2V	Obsolete	TO-236-3
NSV20200LT1G	onsemi	2000	20	460	100	180	250 @ 500mA, 2V	Active	TO-236-3
NSS20200LT1G	onsemi	2000	20	460	100	180	250 @ 500mA, 2V	Active	TO-236-3
BC808-25LT1G	onsemi	500	25	300	100	700	160 @ 100mA, 1V	Active	TO-236-3
BCX18,235	Nexperia USA Inc.	500	25	250	80	620	100 @ 100mA, 1V	Active	TO-236-3
MMS8550-L-TP	Micro Commercial Co	500	25	300	150	600	120 @ 50mA, 1V	Active	TO-236-3
PBSS5120T,215	Nexperia USA Inc.	1000	20	480	100	250	250 @ 500mA, 2V	Active	TO-236-3

Engineering Selection Recommendations

For Direct Replacement (Matched Specifications):

NSV20200LT1G and NSS20200LT1G are functionally equivalent to the 2SB07790RL within the original 20V/500mA operating envelope. Both parts are manufactured by onsemi, carry Active product status, and are RoHS3 compliant. These parts provide enhanced current handling (2A maximum) and improved power dissipation (460mW), offering superior performance margins. NSV20200LT1G is supplied in Tape & Reel packaging, while NSS20200LT1G is available in Cut Tape & Digi-Reel format.

For Enhanced Voltage Margin Applications:

BC808-25LT1G, BCX18,235, and MMS8550-L-TP provide 25V collector-emitter breakdown voltage, delivering 5V additional voltage margin over the original specification. All three maintain 500mA collector current rating and TO-236-3 package compatibility. BC808-25LT1G and MMS8550-L-TP offer 300mW power dissipation. MMS8550-L-TP matches the original 150MHz transition frequency. BCX18,235 carries AEC-Q101 automotive qualification.

For Higher Current Applications:

PBSS5120T,215 supports 1A collector current while maintaining 20V breakdown voltage and TO-236-3 package compatibility. This part carries AEC-Q100 automotive qualification and is suitable for applications requiring increased current handling within the original voltage specification.

Product Status Consideration:

All substitute parts listed carry Active product status, ensuring long-term availability and supply chain continuity. The original 2SB07790RL is classified as Obsolete.

Frequently Asked Questions (FAQ)

Q: Can NSV20200LT1G or NSS20200LT1G be used as direct replacements for 2SB07790RL?

A: Yes. Both parts maintain the 20V collector-emitter breakdown voltage and support 500mA collector current operation. The TO-236-3 package footprint is identical. The higher current rating (2A maximum) and improved saturation characteristics provide enhanced performance margins without affecting circuit compatibility.

Q: What is the difference between NSV20200LT1G and NSS20200LT1G?

A: Both parts are electrically identical PNP transistors from onsemi with matching electrical specifications. The primary difference is packaging format: NSV20200LT1G is supplied in Tape & Reel (TR), while NSS20200LT1G is supplied in Cut Tape (CT) & Digi-Reel format. Selection depends on assembly process requirements.

Q: Why do BC808-25LT1G, BCX18,235, and MMS8550-L-TP have 25V ratings instead of 20V?

A: These parts are designed with higher voltage ratings to provide additional safety margin in applications. A 25V-rated device operates safely within a 20V circuit environment. The higher voltage specification does not affect circuit operation at 20V and below.

Q: Is MMS8550-L-TP suitable for high-frequency applications?

A: Yes. MMS8550-L-TP maintains 150MHz transition frequency, matching the original 2SB07790RL specification. This makes it suitable for applications requiring higher switching speeds compared to BC808-25LT1G and BCX18,235, which are rated at 100MHz and 80MHz respectively.

Q: Can PBSS5120T,215 be used in place of 2SB07790RL?

A: Yes, within the 500mA operating range. PBSS5120T,215 is rated for 1A maximum collector current and maintains 20V breakdown voltage. The TO-236-3 package is compatible. The higher current rating provides additional margin for applications operating at or below 500mA.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance certification. NSV20200LT1G, NSS20200LT1G, BC808-25LT1G, MMS8550-L-TP, and PBSS5120T,215 are all RoHS3 compliant.

Q: Which substitute part is recommended for automotive applications?

A: BCX18,235 and PBSS5120T,215 carry automotive-grade qualifications. BCX18,235 holds AEC-Q101 qualification, while PBSS5120T,215 holds AEC-Q100 qualification. Both are suitable for automotive circuit implementations.

Q: What is the moisture sensitivity level (MSL) for the substitute parts?

A: All substitute parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage and handling.

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