BAT42XV2 Equivalent & Substitute Parts

Part Overview

The BAT42XV2 is a Schottky diode manufactured by onsemi, rated for 30 V DC reverse voltage and 200 mA average rectified current in a surface mount SOD-523F package. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. The BAT42XV2 serves applications requiring small-signal Schottky rectification with fast switching characteristics and low forward voltage drop.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	30 V
Current - Average Rectified (Io)	200 mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 200 mA
Reverse Recovery Time (trr)	5 ns
Current - Reverse Leakage @ Vr	500 nA @ 25 V
Capacitance @ Vr, F	7 pF @ 1 V, 1 MHz
Mounting Type	Surface Mount
Package / Case	SC-79, SOD-523F
Operating Temperature - Junction (Max)	125°C
Technology	Schottky
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the BAT42XV2 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 30 V
Current - Average Rectified (Io): 200 mA
Mounting Type: Surface Mount
Technology: Schottky
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Package Compatibility: The BAT42XV2 uses SOD-523F packaging. Substitute parts may use SOD-523 or SOD-523F variants, as both are mechanically compatible SC-79 case styles suitable for surface mount assembly.

Electrical Performance Variations: Substitute parts are grouped based on forward voltage characteristics and reverse leakage specifications. Parts with lower forward voltage (500 mV to 600 mV @ 200 mA) represent improved performance variants. Parts with higher reverse leakage (30 µA @ 10 V) are acceptable substitutes where leakage current tolerance permits.

Product Status Consideration: The BAT42XV2 is obsolete. All listed substitute parts maintain active product status, ensuring long-term availability and supply chain continuity.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Package	Product Status	Trr	Reverse Leakage @ Vr	Capacitance @ Vr, F	Tj (Max)
BAT42XV2	onsemi	30 V	200 mA	1 V @ 200 mA	SOD-523F	Obsolete	5 ns	500 nA @ 25 V	7 pF @ 1 V, 1 MHz	125°C
BAT43XV2	onsemi	30 V	200 mA	1 V @ 200 mA	SOD-523F	Active	5 ns	500 nA @ 25 V	7 pF @ 1 V, 1 MHz	125°C
NSRLL30XV2T1G	onsemi	30 V	200 mA	600 mV @ 200 mA	SOD-523	Active	—	1 µA @ 10 V	—	150°C
NSVRB521S30T1G	onsemi	30 V	200 mA	500 mV @ 200 mA	SOD-523	Active	—	30 µA @ 10 V	—	125°C
RB520S30T1G	onsemi	30 V	200 mA	600 mV @ 200 mA	SOD-523	Active	—	1 µA @ 10 V	—	150°C
RB520S30T5G	onsemi	30 V	200 mA	600 mV @ 200 mA	SOD-523	Active	—	1 µA @ 10 V	—	150°C
RB521S30T1G	onsemi	30 V	200 mA	500 mV @ 200 mA	SOD-523	Active	—	30 µA @ 10 V	—	125°C
RB521S30T5G	onsemi	30 V	200 mA	500 mV @ 200 mA	SOD-523	Active	—	30 µA @ 10 V	—	125°C
1PS79SB10,115	Nexperia USA Inc.	30 V	200 mA	800 mV @ 100 mA	SOD-523	Active	—	2 µA @ 25 V	10 pF @ 1 V, 1 MHz	125°C
1PS79SB31,115	Nexperia USA Inc.	30 V	200 mA	500 mV @ 200 mA	SOD-523	Active	—	30 µA @ 10 V	25 pF @ 1 V, 1 MHz	125°C
1PS79SB31,135	Nexperia USA Inc.	30 V	200 mA	500 mV @ 200 mA	SOD-523	Active	—	30 µA @ 10 V	25 pF @ 1 V, 1 MHz	125°C

Engineering Selection Recommendations

Direct Parametric Equivalent: BAT43XV2 is the primary active equivalent to BAT42XV2. Both parts share identical electrical specifications including forward voltage (1 V @ 200 mA), reverse recovery time (5 ns), reverse leakage (500 nA @ 25 V), and capacitance (7 pF @ 1 V, 1 MHz). Both are ROHS3 compliant with MSL 1 rating. The BAT43XV2 maintains the same SOD-523F package and maximum junction temperature of 125°C.

onsemi Active Substitutes: NSRLL30XV2T1G, RB520S30T1G, RB520S30T5G, NSVRB521S30T1G, RB521S30T1G, and RB521S30T5G are all active onsemi products meeting the 30 V, 200 mA core requirements. These parts use SOD-523 packaging (mechanically compatible with SOD-523F). NSRLL30XV2T1G and RB520 variants offer improved forward voltage (600 mV @ 200 mA) and lower reverse leakage (1 µA @ 10 V). RB521 and NSVRB521S30T1G variants provide the lowest forward voltage (500 mV @ 200 mA) with higher reverse leakage (30 µA @ 10 V). All maintain ROHS3 compliance and MSL 1 rating.

Nexperia Cross-Manufacturer Substitutes: 1PS79SB10,115, 1PS79SB31,115, and 1PS79SB31,135 are Nexperia USA Inc. products meeting 30 V, 200 mA specifications in SOD-523 packaging. All are ROHS3 compliant with MSL 1 rating. 1PS79SB10,115 carries AEC-Q100 automotive qualification. 1PS79SB31 variants (both ,115 and ,135 packaging options) provide 500 mV forward voltage @ 200 mA with 30 µA reverse leakage @ 10 V.

Supply Chain Continuity: All substitute parts maintain active product status, ensuring availability for new designs and ongoing production requirements. onsemi substitutes provide the largest inventory quantities, with RB521S30T1G offering 335,885 pieces in stock.

Frequently Asked Questions (FAQ)

Q: Can BAT42XV2 be directly replaced with BAT43XV2? A: Yes. BAT43XV2 is an active equivalent with identical electrical specifications, including forward voltage (1 V @ 200 mA), reverse recovery time (5 ns), reverse leakage (500 nA @ 25 V), and capacitance (7 pF @ 1 V, 1 MHz). Both use SOD-523F packaging and maintain 125°C maximum junction temperature. ROHS3 compliance and MSL 1 rating are identical.

Q: What is the difference between SOD-523 and SOD-523F packaging? A: Both SOD-523 and SOD-523F are SC-79 case style surface mount packages with identical mechanical dimensions and pin configurations. The "F" designation in SOD-523F indicates a specific variant, but both are mechanically compatible for PCB assembly. Electrical performance is determined by the die and internal construction, not the package designation alone.

Q: Which substitute offers the lowest forward voltage? A: NSVRB521S30T1G, RB521S30T1G, RB521S30T5G, 1PS79SB31,115, and 1PS79SB31,135 all provide 500 mV forward voltage @ 200 mA, representing the lowest forward voltage among active substitutes. The BAT42XV2 original specification is 1 V @ 200 mA.

Q: Are there differences in reverse leakage between substitutes? A: Yes. BAT42XV2 specifies 500 nA @ 25 V. NSRLL30XV2T1G and RB520 variants specify 1 µA @ 10 V. NSVRB521S30T1G, RB521 variants, and 1PS79SB31 parts specify 30 µA @ 10 V. 1PS79SB10,115 specifies 2 µA @ 25 V. Selection depends on application leakage current tolerance.

Q: What is the maximum operating temperature for each substitute? A: BAT42XV2 and BAT43XV2 are rated to 125°C maximum junction temperature. NSRLL30XV2T1G and RB520 variants extend to 150°C. NSVRB521S30T1G, RB521 variants, and Nexperia 1PS79SB parts are rated to 125°C maximum.

Q: Is automotive qualification available? A: 1PS79SB10,115 carries AEC-Q100 automotive qualification. Other substitutes do not list automotive qualification in the provided specifications.

Q: What packaging options are available for substitutes? A: onsemi NSRLL30XV2T1G is supplied in Tape & Reel (TR). onsemi RB520 and RB521 variants are supplied in Cut Tape (CT) & Digi-Reel®. Nexperia 1PS79SB10,115 is supplied in Tape & Reel (TR). Nexperia 1PS79SB31,115 is supplied in Cut Tape (CT) & Digi-Reel®. Nexperia 1PS79SB31,135 is supplied in Tape & Reel (TR).

Q: Which substitute has the highest inventory availability? A: RB521S30T1G maintains the highest inventory with 335,885 pieces in stock, followed by RB520S30T1G with 185,400 pieces.

Q: Can BAT42XV2 be used in new designs? A: No. BAT42XV2 is classified as obsolete. New designs must select from active substitute parts listed in this reference. BAT43XV2 is the recommended direct replacement for new designs requiring identical electrical specifications.

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