BAV19_T50R Equivalent & Substitute Parts

Part Overview

The BAV19_T50R is a general-purpose rectifier diode manufactured by onsemi, rated for 120 V DC reverse voltage and 200 mA average rectified current in a DO-35 through-hole package. This part is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support, maintenance, and production continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts offer compatible performance within defined parameter tolerances for the same application category.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	120	V
Current - Average Rectified (Io)	200	mA
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 200 mA	V
Reverse Recovery Time (trr)	50	ns
Current - Reverse Leakage @ Vr	100 nA @ 100 V	nA
Capacitance @ Vr, F	5	pF @ 0V, 1MHz
Mounting Type	Through Hole	—
Package / Case	DO-204AH, DO-35, Axial	—
Operating Temperature - Junction (Max)	175	°C
Technology	Standard	—

Substitute Part Grouping Explanation

Substitution of the BAV19_T50R is determined by electrical parameter compatibility within the general-purpose rectifier diode category. The critical parameters governing substitution are:

Electrical Compatibility Criteria:

Voltage - DC Reverse (Vr) (Max): Substitute must equal or exceed 120 V
Current - Average Rectified (Io): Substitute must equal or exceed 200 mA
Voltage - Forward (Vf) (Max) @ If: Substitute must not exceed 1.25 V @ 200 mA
Reverse Recovery Time (trr): Substitute must equal or be faster than 50 ns
Current - Reverse Leakage @ Vr: Substitute must not exceed 100 nA @ 100 V
Capacitance @ Vr, F: Substitute must not exceed 5 pF @ 0V, 1MHz

Mechanical Compatibility Criteria:

Mounting Type: Through Hole (required)
Package / Case: DO-204AH, DO-35, Axial (required)

Parts are classified as parametric equivalents when all electrical and mechanical parameters match the main part specification. Parts are classified as similar when they meet or exceed the electrical requirements but may differ in secondary parameters such as forward voltage at different current levels, speed classification, or packaging format.

Parameter Comparison

Parameter	BAV19_T50R (onsemi)	BAV19TR (Fairchild)	BAV19-TAP (Vishay)	BAV20,133 (NXP)
Voltage - DC Reverse (Vr) (Max)	120 V	120 V	100 V	150 V
Current - Average Rectified (Io)	200 mA	200 mA	250 mA	250 mA
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 200 mA	1.25 V @ 200 mA	1 V @ 100 mA	1.25 V @ 200 mA
Reverse Recovery Time (trr)	50 ns	50 ns	50 ns	50 ns
Current - Reverse Leakage @ Vr	100 nA @ 100 V	100 nA @ 100 V	100 nA @ 100 V	100 nA @ 150 V
Capacitance @ Vr, F	5 pF @ 0V, 1MHz	5 pF @ 0V, 1MHz	1.5 pF @ 0V, 1MHz	5 pF @ 0V, 1MHz
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial
Operating Temperature - Junction (Max)	175°C	175°C	175°C	175°C
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

BAV19TR (Fairchild Semiconductor) - Parametric Equivalent

The BAV19TR is a parametric equivalent to the BAV19_T50R. All electrical specifications match exactly: 120 V reverse voltage, 200 mA average rectified current, 1.25 V forward voltage at 200 mA, 50 ns reverse recovery time, and identical leakage and capacitance characteristics. The part is in active production status with 10,400 units in stock. Mechanical compatibility is confirmed through identical DO-35 packaging. This part is the primary replacement for obsolete BAV19_T50R applications.

BAV19-TAP (Vishay General Semiconductor - Diodes Division) - Similar Substitute

The BAV19-TAP is a similar substitute with enhanced electrical performance. It provides 250 mA average rectified current (exceeding the 200 mA requirement) and improved forward voltage characteristics at 1 V @ 100 mA. However, the reverse voltage rating is 100 V, which is below the 120 V specification of the main part. This part is suitable only for applications where the actual reverse voltage stress does not exceed 100 V. The part carries AEC-Q101 automotive qualification and is supplied in Tape & Box packaging. Product status is active with 840 units in stock.

BAV20,133 (NXP USA Inc.) - Similar Substitute

The BAV20,133 is a similar substitute with enhanced electrical performance. It provides 150 V reverse voltage (exceeding the 120 V requirement) and 250 mA average rectified current (exceeding the 200 mA requirement). Forward voltage and reverse recovery time match the main part specification. Reverse leakage is specified at 150 V, demonstrating superior performance margin. This part is in active production with 223,049 units in stock. The ALF2 supplier device package is mechanically compatible with DO-35 through-hole applications.

Frequently Asked Questions (FAQ)

Q: Can BAV19TR be used as a direct replacement for BAV19_T50R?

A: Yes. The BAV19TR is a parametric equivalent with identical electrical and mechanical specifications. All critical parameters—reverse voltage, average rectified current, forward voltage, reverse recovery time, leakage current, and capacitance—match the BAV19_T50R exactly. Both use DO-35 through-hole packaging. The BAV19TR is in active production status, making it the recommended replacement for the obsolete BAV19_T50R.

Q: What is the difference between BAV19-TAP and BAV19_T50R?

A: The BAV19-TAP differs in reverse voltage rating (100 V versus 120 V) and forward voltage characteristics. The BAV19-TAP provides higher average rectified current (250 mA versus 200 mA) and lower forward voltage at 100 mA (1 V versus 1.25 V @ 200 mA). The BAV19-TAP is suitable for applications where the reverse voltage stress remains below 100 V. Both parts use DO-35 through-hole packaging and share identical reverse recovery time and leakage characteristics.

Q: Can BAV20,133 replace BAV19_T50R in all applications?

A: The BAV20,133 meets or exceeds all electrical requirements of the BAV19_T50R. It provides higher reverse voltage (150 V versus 120 V), higher average rectified current (250 mA versus 200 mA), and identical forward voltage and reverse recovery time. The BAV20,133 is mechanically compatible through DO-35 through-hole packaging. Substitution is valid for all applications where the BAV19_T50R was specified, with the added benefit of higher voltage and current margins.

Q: Are there packaging differences between these substitute parts?

A: All substitute parts use DO-35 through-hole axial packaging, which is mechanically compatible with the BAV19_T50R. The BAV19TR is supplied in bulk packaging, the BAV19-TAP is supplied in Tape & Box format, and the BAV20,133 is supplied in bulk packaging. These packaging differences affect handling and assembly processes but do not affect electrical performance or mechanical fit in through-hole applications.

Q: What is the inventory status of these substitute parts?

A: The BAV19TR has 10,400 units in stock. The BAV19-TAP has 840 units in stock. The BAV20,133 has 223,049 units in stock. All substitute parts are in active production status, ensuring long-term availability for design support and production requirements.

Q: Do any of these substitute parts have automotive qualification?

A: The BAV19-TAP carries AEC-Q101 automotive qualification, making it suitable for automotive applications requiring this certification. The BAV19TR and BAV20,133 do not list automotive qualification in their specifications.

Q: What is the reverse leakage current specification for each part?

A: All parts specify 100 nA reverse leakage current. The BAV19_T50R, BAV19TR, and BAV19-TAP specify this at 100 V. The BAV20,133 specifies 100 nA @ 150 V, demonstrating the leakage performance at its higher voltage rating.

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