BAW156 Equivalent & Substitute Parts

Part Overview

The BAW156 is a general-purpose diode array in a 1 Pair Common Anode configuration, rated for 85 V DC reverse voltage and 140 mA average rectified current per diode. Manufactured by Diodes Incorporated, this component is packaged in the SOT-23-3 (TO-236-3, SC-59) surface mount form factor and is classified as a small signal rectifier diode.

The BAW156 has been discontinued at DiGi Electronics. Identification of equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements. Substitute parts must maintain functional compatibility within the specified electrical and mechanical parameters while accounting for differences in voltage ratings, current capacity, and manufacturing compliance standards.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Anode	—
Voltage - DC Reverse (Vr) (Max)	85	V
Current - Average Rectified (Io) (per Diode)	140	mA (DC)
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 50 mA	—
Reverse Recovery Time (trr)	3	µs
Current - Reverse Leakage @ Vr	5 nA @ 75 V	—
Operating Temperature - Junction	-65 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Technology	Standard	—
Speed Classification	Small Signal ≤ 200mA (Io), Any Speed	—

Substitute Part Grouping Explanation

Substitution of the BAW156 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Substitution:

Diode Configuration: 1 Pair Common Anode (must match exactly)
Package / Case: TO-236-3, SC-59, SOT-23-3 (must match exactly)
Mounting Type: Surface Mount (must match exactly)
Voltage - DC Reverse (Vr) (Max): Must equal or exceed 85 V
Current - Average Rectified (Io) (per Diode): Must equal or exceed 140 mA
Operating Temperature - Junction: Must encompass or exceed -65°C to 150°C range
Technology: Standard (must match)
Speed Classification: Small Signal ≤ 200mA (Io), Any Speed (must match)

Substitute Categories:

Direct Parametric Equivalent: BAW156-7-F maintains identical electrical specifications (85 V, 140 mA) with identical package configuration. The only difference is packaging format (Tape & Reel versus Cut Tape) and RoHS compliance status upgrade.

Functional Equivalents with Reduced Voltage Rating: BAW156,215, BAW156_R1_00001, BAW56LT1G, and BAW56LT3G all provide equal or greater current capacity (160–200 mA) but operate at reduced maximum reverse voltage ratings (70–75 V). These parts are suitable for applications where the 85 V rating is not required and where the lower voltage specification meets circuit requirements.

Parameter Comparison

Parameter	BAW156 (Main)	BAW156-7-F	BAW156,215	BAW156_R1_00001	BAW56LT1G	BAW56LT3G
Manufacturer	Diodes Incorporated	Diodes Incorporated	Nexperia USA Inc.	Panjit International Inc.	onsemi	onsemi
Diode Configuration	1 Pair Common Anode	1 Pair Common Anode	1 Pair Common Anode	1 Pair Common Anode	1 Pair Common Anode	1 Pair Common Anode
Voltage - DC Reverse (Vr) (Max)	85 V	85 V	75 V	75 V	70 V	70 V
Current - Average Rectified (Io) (per Diode)	140 mA	140 mA	160 mA	200 mA	200 mA	200 mA
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 50 mA	1.1 V @ 50 mA	1.25 V @ 150 mA	1.25 V @ 150 mA	1.25 V @ 150 mA	1.25 V @ 150 mA
Reverse Recovery Time (trr)	3 µs	3 µs	3 µs	3 µs	6 ns	6 ns
Current - Reverse Leakage @ Vr	5 nA @ 75 V	5 nA @ 75 V	5 nA @ 75 V	5 nA @ 75 V	2.5 µA @ 70 V	2.5 µA @ 70 V
Operating Temperature - Junction	-65 to 150°C	-65 to 150°C	150°C (Max)	-55 to 150°C	-55 to 150°C	-55 to 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Technology	Standard	Standard	Standard	Standard	Standard	Standard
Speed Classification	Small Signal ≤ 200mA, Any Speed	Small Signal ≤ 200mA, Any Speed	Small Signal ≤ 200mA, Any Speed	Small Signal ≤ 200mA, Any Speed	Small Signal ≤ 200mA, Any Speed	Small Signal ≤ 200mA, Any Speed
Product Status	Discontinued at DiGi Electronics	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Cut Tape (CT)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)
Inventory Status	158,300 Pcs	125,100 Pcs	39,586 Pcs	4,100 Pcs	305,200 Pcs	90,100 Pcs

Engineering Selection Recommendations

BAW156-7-F (Diodes Incorporated)

BAW156-7-F is the direct parametric equivalent to the BAW156. It maintains identical electrical specifications: 85 V maximum reverse voltage, 140 mA average rectified current, 1.1 V forward voltage at 50 mA, and 3 µs reverse recovery time. The component is packaged in the same SOT-23-3 form factor and is pin-compatible. The primary differences are packaging format (Tape & Reel versus Cut Tape) and RoHS3 compliance status. This part is recommended as the primary substitute when the 85 V rating is required and when RoHS3 compliance is mandated. Product status is Active with 125,100 units in stock.

BAW156,215 (Nexperia USA Inc.)

BAW156,215 provides a functional equivalent with increased current capacity (160 mA versus 140 mA) but operates at a reduced maximum reverse voltage of 75 V. This part is suitable for applications where the circuit voltage does not exceed 75 V and where the higher current rating provides design margin. The component carries AEC-Q100 automotive qualification and is ROHS3 compliant. Product status is Active with 39,586 units in stock. Forward voltage is specified at 1.25 V @ 150 mA, which differs from the BAW156 specification point.

BAW156_R1_00001 (Panjit International Inc.)

BAW156_R1_00001 offers the highest current capacity among substitutes at 200 mA per diode, with a 75 V maximum reverse voltage rating. Operating temperature range is -55°C to 150°C. This part is suitable for applications requiring higher current handling within the 75 V voltage constraint. ROHS3 compliant. Product status is Active with limited inventory (4,100 units).

BAW56LT1G and BAW56LT3G (onsemi)

Both BAW56LT1G and BAW56LT3G are functionally equivalent with 200 mA current capacity and 70 V maximum reverse voltage. These parts differ only in packaging format: BAW56LT1G is supplied in Cut Tape (CT) & Digi-Reel® format, while BAW56LT3G is supplied in Tape & Reel (TR) format. Both are ROHS3 compliant with Active product status. Reverse recovery time is specified as 6 ns (faster than the BAW156's 3 µs). These parts are suitable for applications where 70 V rating is sufficient and where faster switching characteristics are beneficial. BAW56LT1G has the highest inventory availability at 305,200 units.

Selection Criteria Summary:

For 85 V requirement with RoHS3 compliance: Select BAW156-7-F
For 75 V applications with automotive qualification: Select BAW156,215
For 75 V applications with maximum current capacity: Select BAW156_R1_00001
For 70 V applications with fastest switching speed and highest availability: Select BAW56LT1G or BAW56LT3G

Frequently Asked Questions (FAQ)

Q: Can BAW156-7-F be used as a direct replacement for BAW156?

A: Yes. BAW156-7-F is a direct parametric equivalent with identical electrical specifications (85 V, 140 mA, 1.1 V forward voltage, 3 µs recovery time) and identical SOT-23-3 package. The only differences are packaging format (Tape & Reel versus Cut Tape) and RoHS3 compliance upgrade. Pin configuration and functional performance are identical.

Q: What is the voltage derating consideration when substituting with BAW156,215, BAW156_R1_00001, or BAW56LT series?

A: These substitutes operate at reduced maximum reverse voltage ratings (75 V or 70 V) compared to the BAW156's 85 V rating. Substitution is valid only when the circuit's maximum reverse voltage does not exceed the substitute part's rating. If the circuit requires 85 V capability, these parts are not suitable.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (BAW156-7-F, BAW156,215, BAW156_R1_00001, BAW56LT1G, and BAW56LT3G) are ROHS3 compliant. The original BAW156 is RoHS non-compliant. If RoHS3 compliance is a design requirement, any of the listed substitutes are acceptable from a compliance perspective.

Q: What is the difference between BAW56LT1G and BAW56LT3G?

A: BAW56LT1G and BAW56LT3G are electrically identical. Both are manufactured by onsemi with 70 V maximum reverse voltage and 200 mA current capacity. The only difference is packaging format: BAW56LT1G is supplied in Cut Tape (CT) & Digi-Reel® format, while BAW56LT3G is supplied in Tape & Reel (TR) format. Selection between them depends on assembly process requirements and packaging preferences.

Q: Does the forward voltage difference between BAW156 (1.1 V @ 50 mA) and substitutes (1.25 V @ 150 mA) affect circuit performance?

A: Forward voltage specifications are provided at different test current points. Direct comparison requires evaluation at the same operating current. The BAW156 specification is measured at 50 mA, while substitute specifications are measured at 150 mA. For accurate circuit analysis, forward voltage must be evaluated at the actual operating current of the application. Higher forward voltage at higher current is typical for diode characteristics.

Q: Which substitute has the fastest switching speed?

A: BAW56LT1G and BAW56LT3G have the fastest reverse recovery time at 6 nanoseconds, compared to 3 microseconds for the BAW156 and other substitutes. These parts are suitable for applications requiring faster switching performance.

Q: Is BAW156,215 suitable for automotive applications?

A: Yes. BAW156,215 carries AEC-Q100 automotive qualification, making it suitable for automotive-grade applications. Other substitutes do not list automotive qualification.

Q: What inventory considerations should guide substitute selection?

A: BAW56LT1G has the highest inventory availability at 305,200 units, followed by BAW156-7-F at 125,100 units. BAW156_R1_00001 has limited inventory at 4,100 units. For supply chain continuity, BAW56LT1G or BAW156-7-F are preferred if voltage and compliance requirements permit.

Q: Can I use a substitute with higher current rating (200 mA) in place of the 140 mA BAW156?

A: Yes. A substitute with higher current rating (160 mA or 200 mA) is functionally compatible and provides design margin. The circuit will operate within the substitute's specifications. However, voltage rating must still meet or exceed circuit requirements.

Q: What is the operating temperature range consideration for substitution?

A: The BAW156 operates from -65°C to 150°C. Most substitutes operate from -55°C to 150°C, which is a narrower range at the low end. If the application requires operation below -55°C, only BAW156-7-F (which maintains the -65°C lower limit) is suitable.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message