BAW 56 B5003 Equivalent & Substitute Parts

Part Overview

The BAW 56 B5003 is a diode array with 1 pair common anode configuration manufactured by Infineon Technologies. This component is rated for 80 V DC reverse voltage and 200 mA average rectified current per diode, housed in a Surface Mount TO-236-3 (SC-59, SOT-23-3) package. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design requirements and procurement needs.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Anode
Voltage - DC Reverse (Vr) (Max)	80 V
Current - Average Rectified (Io) (per Diode)	200 mA (DC)
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 150 mA
Speed Classification	Small Signal ≤ 200mA (Io), Any Speed
Reverse Recovery Time (trr)	4 ns
Operating Temperature - Junction (Max)	150°C
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the BAW 56 B5003 is determined by the following critical parameters:

Primary Compatibility Criteria:

Diode Configuration: 1 Pair Common Anode (mandatory)
Mounting Type: Surface Mount (mandatory)
Package / Case: TO-236-3, SC-59, SOT-23-3 or compatible variants (mandatory for direct PCB replacement)

Electrical Performance Criteria:

Voltage - DC Reverse (Vr): Must equal or exceed 80 V
Current - Average Rectified (Io): Must equal or exceed 200 mA per diode
Operating Temperature - Junction: Must support 150°C maximum

Substitute parts are grouped into two categories based on package compatibility:

Category 1: Direct Package Replacement (SOT-23-3 / TO-236-3) Parts maintaining identical or compatible surface mount packages, enabling direct PCB substitution without layout modifications.

Category 2: Alternative Package (SOT-323 / SC-70) Parts with different surface mount packages, requiring PCB layout evaluation but maintaining electrical and functional equivalence.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	trr	Tj (Max)	Package	Product Status
BAW 56 B5003	Infineon Technologies	80 V	200 mA	1.25 V @ 150 mA	4 ns	150°C	SOT-23-3	Obsolete
BAS35	Diotec Semiconductor	90 V	200 mA	1 V @ 200 mA	50 ns	150°C	SOT-23-3	Active
BAW156,215	Nexperia USA Inc.	75 V	160 mA	1.25 V @ 150 mA	3 µs	150°C	SOT-23-3	Active
BAW156-7-F	Diodes Incorporated	85 V	140 mA	1.1 V @ 50 mA	3 µs	150°C	SOT-23-3	Active
BAW156-TP	Micro Commercial Co	75 V	160 mA	Not specified	3 µs	150°C	SOT-23-3	Active
BAW56-7-F	Diodes Incorporated	75 V	300 mA	1.25 V @ 150 mA	4 ns	150°C	SOT-23-3	Active
BAW56-TP	Micro Commercial Co	75 V	250 mA	855 mV @ 10 mA	4 ns	150°C	SOT-23-3	Active
BAW56W,115	Nexperia USA Inc.	90 V	150 mA	1.25 V @ 150 mA	4 ns	150°C	SOT-323	Active
BAW56W,135	NXP Semiconductors	90 V	150 mA	1.25 V @ 150 mA	4 ns	150°C	SOT-323	Active
MMBD1505A	Fairchild Semiconductor	200 V	200 mA	1.1 V @ 200 mA	Not specified	150°C	SOT-23-3	Active

Engineering Selection Recommendations

Direct Replacement (SOT-23-3 Package):

BAS35 (Diotec Semiconductor) provides the most direct electrical equivalence with 90 V reverse voltage rating and 200 mA current capacity, exceeding the BAW 56 B5003 specifications. This part is active and available in high inventory (65,100 pcs). The 50 ns reverse recovery time is longer than the original 4 ns specification but remains within small signal diode classification.

MMBD1505A (Fairchild Semiconductor) offers superior voltage rating at 200 V with matching 200 mA current capacity and identical SOT-23-3 package. This part is suitable for applications requiring higher voltage margin. Product status is active with 35,100 pcs in inventory.

BAW56-TP (Micro Commercial Co) and BAW56-7-F (Diodes Incorporated) both provide enhanced current capacity (250 mA and 300 mA respectively) while maintaining the 4 ns reverse recovery time characteristic of the original part. Both are active products with substantial inventory availability.

Alternative Package (SOT-323):

BAW56W,115 (Nexperia USA Inc.) and BAW56W,135 (NXP Semiconductors) maintain identical electrical specifications to the original part (90 V, 150 mA, 4 ns trr) but use the smaller SOT-323 package. These parts require PCB layout modification but offer space optimization benefits. Both are active with automotive qualification (AEC-Q101).

Limited Current Applications:

BAW156,215 (Nexperia USA Inc.) and BAW156-TP (Micro Commercial Co) are suitable only for applications where 160 mA current capacity is acceptable, as they fall below the original 200 mA specification. Both are active products with automotive qualification (AEC-Q100).

BAW156-7-F (Diodes Incorporated) operates at 140 mA maximum, further limiting applicability to lower-current designs.

Frequently Asked Questions (FAQ)

Q: Can BAW156,215 replace BAW 56 B5003 in all applications?

A: No. BAW156,215 is rated for 160 mA average rectified current, which is below the original part's 200 mA specification. This substitute is suitable only for applications where the circuit design operates at or below 160 mA per diode. Verify circuit current requirements before selection.

Q: What is the difference between BAW56-TP and BAW56-7-F?

A: Both parts maintain the original 4 ns reverse recovery time and SOT-23-3 package. BAW56-7-F is rated for 300 mA current capacity, while BAW56-TP is rated for 250 mA. Both exceed the original 200 mA specification. BAW56-7-F offers higher current margin. Selection depends on circuit current requirements and inventory availability.

Q: Can I use BAW56W,115 or BAW56W,135 as direct PCB replacements?

A: No. These parts use SOT-323 (SC-70) package instead of SOT-23-3. While electrically equivalent, they require PCB layout modification due to different pin spacing and footprint. Direct soldering into SOT-23-3 pads will result in connection failure.

Q: Why does BAS35 have a longer reverse recovery time (50 ns) than the original (4 ns)?

A: BAS35 is classified as a small signal diode with any speed rating, while BAW 56 B5003 specifies 4 ns recovery time. The 50 ns specification for BAS35 remains within small signal diode performance parameters. For applications sensitive to switching speed, verify that 50 ns recovery time meets circuit timing requirements.

Q: Is MMBD1505A suitable for all BAW 56 B5003 applications?

A: MMBD1505A is electrically compatible with 200 V reverse voltage and 200 mA current ratings, both exceeding original specifications. The SOT-23-3 package is identical. This part is suitable for all BAW 56 B5003 applications. The higher voltage rating provides additional design margin for overvoltage protection.

Q: What does "1 Pair Common Anode" configuration mean?

A: This describes a diode array containing two diodes with a shared anode connection. The three pins consist of two cathodes and one common anode. All substitute parts listed maintain this identical configuration, ensuring functional compatibility.

Q: Are there compliance or certification differences between substitute options?

A: Yes. BAW156,215, BAW156-7-F, BAW56W,115, and BAW56W,135 carry automotive qualification (AEC-Q100 or AEC-Q101). BAS35, BAW56-TP, BAW56-7-F, and MMBD1505A do not specify automotive qualification. Select automotive-qualified parts for applications requiring AEC compliance.

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