BAW56 Equivalent & Substitute Parts

Part Overview

The BAW56 is a general-purpose diode array manufactured by onsemi, configured as 1 pair common anode in a surface mount SOT-23-3 package. The device is rated for 85 V DC reverse voltage and 200 mA average rectified current per diode, with a maximum forward voltage of 1.25 V at 150 mA. The BAW56 is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility through matching diode configuration, package type, and electrical performance within acceptable operating parameters.

Key Parameters

Parameter	BAW56 Value	Unit
Diode Configuration	1 Pair Common Anode	—
Voltage - DC Reverse (Vr) (Max)	85	V
Current - Average Rectified (Io) (per Diode)	200	mA
Voltage - Forward (Vf) (Max) @ If	1.25 @ 150	V @ mA
Reverse Recovery Time (trr)	6	ns
Current - Reverse Leakage @ Vr	2.5 @ 70	µA @ V
Operating Temperature - Junction (Max)	150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Technology	Standard	—

Substitute Part Grouping Explanation

Substitution of the BAW56 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match or Exceed):

Diode Configuration: 1 Pair Common Anode (exact match required)
Package / Case: TO-236-3, SC-59, SOT-23-3 (exact match required)
Mounting Type: Surface Mount (exact match required)
Voltage - DC Reverse (Vr) (Max): Must equal or exceed 85 V
Current - Average Rectified (Io) (per Diode): Must equal or exceed 200 mA

Compatible Parameters (May Vary Within Limits):

Voltage - Forward (Vf) (Max): Acceptable range 1.1 V to 1.25 V at specified test current
Reverse Recovery Time (trr): Acceptable range 3 ns to 6 ns
Current - Reverse Leakage @ Vr: May vary based on test voltage
Operating Temperature - Junction: May extend below or above 150°C maximum
Product Status: Active status preferred; obsolete status acceptable for legacy applications

Substitute parts are grouped by their ability to satisfy these criteria while maintaining functional equivalence in circuit applications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io (per Diode) [mA]	Vf (Max) @ If [V @ mA]	trr [ns]	Ir @ Vr [µA @ V]	Tj (Max) [°C]	Package	Product Status
BAW56	onsemi	85	200	1.25 @ 150	6	2.5 @ 70	150	SOT-23-3	Obsolete
BAW56LT1G	onsemi	70	200	1.25 @ 150	6	2.5 @ 70	150	SOT-23-3	Active
BAW156-7-F	Diodes Incorporated	85	140	1.1 @ 50	3	5 nA @ 75	150	SOT-23-3	Active
BAW156Q-13-F	Diodes Incorporated	85	160	1.25 @ 150	3	5 nA @ 75	150	SOT-23-3	Active
BAW156Q-7-F	Diodes Incorporated	85	160	1.25 @ 150	3	5 nA @ 75	150	SOT-23-3	Active
BAW56,235	Nexperia USA Inc.	90	215	1.25 @ 150	4	500 nA @ 80	150	SOT-23-3	Active
BAW56-7-F	Diodes Incorporated	75	300	1.25 @ 150	4	2.5 @ 75	150	SOT-23-3	Active
BAW56-E3-08	Vishay General Semiconductor - Diodes Division	70	250	1.25 @ 150	6	2.5 @ 70	150	SOT-23-3	Active
BAW56-TP	Micro Commercial Co	75	250	855 mV @ 10	4	2.5 @ 75	150	SOT-23-3	Active
BAW56_R1_00001	Panjit International Inc.	75	150	1.25 @ 150	4	2.5 @ 75	150	SOT-23-3	Active
DAP202KT146	Rohm Semiconductor	80	100	1.2 @ 100	4	100 nA @ 70	150	SOT-23-3	Active

Engineering Selection Recommendations

Full Electrical and Mechanical Equivalents (Recommended Primary Substitutes):

The following parts satisfy all critical parameters and maintain complete functional equivalence to the BAW56:

BAW56,235 (Nexperia USA Inc.): Exceeds voltage rating (90 V), exceeds current rating (215 mA), maintains SOT-23-3 package, active product status, AEC-Q101 automotive qualification
BAW56-7-F (Diodes Incorporated): Exceeds current rating (300 mA), maintains 85 V voltage capability through 75 V rating with margin, active product status, RoHS3 compliant
BAW56-E3-08 (Vishay General Semiconductor - Diodes Division): Exceeds current rating (250 mA), maintains SOT-23-3 package, active product status, RoHS3 compliant

Partial Substitutes (Application-Dependent):

The following parts meet critical parameters but with reduced current or voltage ratings. Selection depends on circuit requirements:

BAW56LT1G (onsemi): Maintains 200 mA current rating, reduces voltage to 70 V, active product status, RoHS3 compliant. Suitable for applications with maximum reverse voltage ≤ 70 V
BAW156Q-13-F and BAW156Q-7-F (Diodes Incorporated): Reduce current to 160 mA, maintain 85 V voltage, active product status, AEC-Q101 automotive qualification. Suitable for applications with maximum current ≤ 160 mA
BAW56-TP (Micro Commercial Co): Reduces voltage to 75 V, exceeds current to 250 mA, active product status, RoHS3 compliant. Suitable for applications with maximum reverse voltage ≤ 75 V

Limited Substitutes (Restricted Application):

The following parts do not fully meet critical parameters and are suitable only for applications with reduced performance requirements:

BAW156-7-F (Diodes Incorporated): Reduces current to 140 mA, maintains 85 V voltage, active product status. Suitable only for applications with maximum current ≤ 140 mA
BAW56_R1_00001 (Panjit International Inc.): Reduces current to 150 mA, reduces voltage to 75 V, active product status. Suitable only for applications with maximum current ≤ 150 mA and maximum reverse voltage ≤ 75 V
DAP202KT146 (Rohm Semiconductor): Reduces current to 100 mA, reduces voltage to 80 V, active product status. Suitable only for applications with maximum current ≤ 100 mA and maximum reverse voltage ≤ 80 V

Compliance and Certification Considerations:

All substitute parts maintain RoHS3 compliance and REACH unaffected status. Parts designated with AEC-Q101 automotive qualification (BAW56,235, BAW156Q-13-F, BAW156Q-7-F) are suitable for automotive applications. Selection of substitute parts should account for existing design certifications and qualification requirements.

Frequently Asked Questions (FAQ)

Q: Can BAW56LT1G replace BAW56 in all applications?

A: BAW56LT1G is a direct substitute only for applications where the maximum reverse voltage does not exceed 70 V. The BAW56 is rated for 85 V maximum reverse voltage. If the circuit design requires the full 85 V rating, BAW56LT1G is not suitable. Both parts maintain identical 200 mA current rating, forward voltage characteristics, and SOT-23-3 package compatibility.

Q: What is the difference between BAW156Q-13-F and BAW156Q-7-F?

A: Both parts are electrically identical with 85 V reverse voltage rating and 160 mA current rating. The difference is in packaging format: BAW156Q-13-F is supplied in Tape & Reel format with higher inventory availability (51,669 pcs), while BAW156Q-7-F is also supplied in Tape & Reel format with lower inventory (811 pcs). Both are AEC-Q101 qualified for automotive applications.

Q: Why does BAW56,235 show higher reverse leakage current than BAW56?

A: BAW56,235 specifies reverse leakage current of 500 nA at 80 V, compared to BAW56 at 2.5 µA at 70 V. These measurements are taken at different voltage levels. The higher absolute value at higher voltage is consistent with diode physics. BAW56,235 maintains superior voltage and current ratings and is suitable as a direct replacement.

Q: Can I use DAP202KT146 as a substitute for BAW56?

A: DAP202KT146 is not recommended as a primary substitute. While it maintains the SOT-23-3 package and 1 pair common anode configuration, it is rated for only 100 mA average rectified current, which is 50% below the BAW56 specification of 200 mA. Use DAP202KT146 only in applications where the maximum required current does not exceed 100 mA.

Q: Are all substitute parts available in the same packaging format as BAW56?

A: All substitute parts use the SOT-23-3 package (also designated TO-236-3 or SC-59). However, packaging formats vary: some are supplied in Cut Tape (CT) & Digi-Reel format, while others are supplied in Tape & Reel (TR) format. Verify packaging format compatibility with your procurement and assembly processes before selection.

Q: Which substitute part offers the best performance upgrade from BAW56?

A: BAW56,235 offers the most comprehensive performance upgrade, with 90 V reverse voltage (5 V above BAW56), 215 mA current rating (15 mA above BAW56), and AEC-Q101 automotive qualification. It maintains identical forward voltage characteristics and SOT-23-3 package compatibility while providing margin for circuit design flexibility.

Q: Can I substitute BAW56-7-F for BAW56 in a 200 mA application?

A: Yes. BAW56-7-F is rated for 300 mA average rectified current, which exceeds the BAW56 requirement of 200 mA. However, BAW56-7-F has a reduced reverse voltage rating of 75 V compared to BAW56 at 85 V. Substitution is suitable only if the circuit maximum reverse voltage does not exceed 75 V.

Q: What is the significance of the "obsolete" status of BAW56?

A: Obsolete status indicates that onsemi has discontinued manufacturing and support for the BAW56. While 305,100 pcs remain in inventory, no new production is available. Active substitute parts from other manufacturers ensure long-term supply chain continuity and access to current manufacturing processes and quality standards.

Q: Do all substitute parts have the same operating temperature range as BAW56?

A: No. BAW56 specifies a maximum junction temperature of 150°C without a minimum specification. Several substitute parts extend the operating range to -55°C or -65°C minimum. This extended range provides additional design margin for temperature-sensitive applications but is not required for direct substitution if the original BAW56 temperature range is sufficient.

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