MDB6S Bridge Rectifier Single Phase 600V 1A Equivalent & Substitute Parts

Part Overview

The MDB6S is a single-phase bridge rectifier manufactured by onsemi, rated for 600V peak reverse voltage and 1A average rectified current in a 4-MicroDIP surface mount package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Finding equivalent and substitute parts is necessary for ongoing maintenance, repair, and legacy system support where the original component is no longer readily available or when design flexibility permits alternative packaging or manufacturer selection.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	600 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	4-SMD, Gull Wing
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MDB6S are qualified based on the following criteria:

Voltage Rating: Peak reverse voltage must be 600V or higher
Current Rating: Average rectified current must be 1A or higher
Forward Voltage: Maximum forward voltage at 1A must not exceed 1.1V
Temperature Range: Operating temperature range must encompass -55°C to 150°C
Package Type: All substitutes use 4-SMD, Gull Wing surface mount configuration
Compliance: ROHS3 compliance required; REACH status noted for regulatory tracking

All identified substitutes meet or exceed these electrical specifications. Differences in reverse leakage current, packaging designation, and manufacturer do not affect functional interchangeability within the specified parameter envelope.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (A)	Vf (Max) @ If	Ir @ Vr	Temp Range	Package	Product Status
MDB6S	onsemi	600 V	1 A	1.1 V @ 1 A	10 µA @ 600 V	-55°C ~ 150°C	4-MicroDIP/SMD	Not For New Designs
DF06S1	onsemi	600 V	1 A	1.1 V @ 1 A	5 µA @ 600 V	-55°C ~ 150°C	4-SDIP	Not For New Designs
ABS6-HF	Comchip Technology	600 V	1 A	1.1 V @ 1 A	5 µA @ 1000 V	-55°C ~ 150°C	ABS	Active
ABS6U	SMC Diode Solutions	600 V	1 A	1.1 V @ 1 A	5 µA @ 600 V	-55°C ~ 150°C	ABS	Active
B106S_R2_00001	Panjit International Inc.	600 V	1 A	1.1 V @ 1 A	5 µA @ 600 V	-55°C ~ 150°C	4-MDI	Active
DB105S	SMC Diode Solutions	600 V	1 A	1.1 V @ 1 A	5 µA @ 600 V	-55°C ~ 150°C	DB-S	Active
DBLS105G	Taiwan Semiconductor Corporation	600 V	1 A	1.1 V @ 1 A	2 µA @ 600 V	-55°C ~ 150°C	DBLS	Active
DBLS105GH	Taiwan Semiconductor Corporation	600 V	1 A	1.1 V @ 1 A	2 µA @ 600 V	-55°C ~ 150°C	DBLS	Active
DF06S-E3/77	Vishay General Semiconductor - Diodes Division	600 V	1 A	1.1 V @ 1 A	5 µA @ 600 V	-55°C ~ 150°C	DFS	Active
DF06SA-E3/77	Vishay General Semiconductor - Diodes Division	600 V	1 A	1.1 V @ 1 A	5 µA @ 600 V	-55°C ~ 150°C	DFS	Active
SDB105-TP	Micro Commercial Co	600 V	1 A	1.1 V @ 1 A	10 µA @ 600 V	-55°C ~ 150°C	SDB-1	Active

Engineering Selection Recommendations

For Legacy System Maintenance: When the MDB6S is no longer available, any substitute from the active product status category provides direct functional replacement. DF06SA-E3/77, DB105S, ABS6U, and B106S_R2_00001 are recommended as primary alternatives due to their active product status and established supply chain availability.

For Automotive Applications: DBLS105GH is qualified to AEC-Q101 automotive standard and carries automotive-grade designation, making it suitable for applications requiring automotive qualification.

For Compliance-Sensitive Applications: All substitutes maintain ROHS3 compliance. DF06SA-E3/77, DF06S-E3/77, DBLS105G, DBLS105GH, and ABS6-HF carry REACH Unaffected status, providing regulatory clarity for international markets.

For Reverse Leakage Considerations: DBLS105G and DBLS105GH exhibit lower reverse leakage current (2 µA @ 600V) compared to the MDB6S (10 µA @ 600V), offering improved performance in low-leakage applications.

Package Compatibility: Verify PCB footprint compatibility with the selected substitute package designation. While all parts maintain 4-SMD, Gull Wing configuration, specific package dimensions may vary between manufacturer designations (4-MicroDIP, 4-SDIP, ABS, 4-MDI, DB-S, DBLS, DFS, SDB-1).

Frequently Asked Questions (FAQ)

Q: Can I directly replace MDB6S with any of these substitutes without PCB modification?

A: All substitutes use 4-SMD, Gull Wing surface mount configuration. However, specific package footprints may differ between manufacturers. Verify the exact package dimensions against your PCB design before implementation. Some substitutes may require minor footprint adjustments.

Q: What is the difference between DF06S-E3/77 and DF06SA-E3/77?

A: Both parts are manufactured by Vishay and share identical electrical specifications (600V, 1A, 1.1V forward voltage). The difference lies in packaging designation and potential internal construction variations. Consult Vishay datasheets for specific package dimensions and internal configuration details.

Q: Are DBLS105G and DBLS105GH interchangeable?

A: Both parts are manufactured by Taiwan Semiconductor Corporation with identical electrical specifications. DBLS105GH carries automotive qualification (AEC-Q101) and automotive-grade designation, while DBLS105G does not. Select DBLS105GH for automotive applications requiring qualification compliance.

Q: Why do some substitutes show lower reverse leakage current?

A: Reverse leakage current variation (2 µA to 10 µA @ 600V) reflects manufacturing process differences between suppliers. All values remain within acceptable limits for standard bridge rectifier applications. Lower leakage provides marginal performance improvement in sensitive analog circuits.

Q: What does "Not For New Designs" status mean for MDB6S?

A: This designation indicates the MDB6S has reached end-of-life and onsemi no longer recommends it for new circuit designs. Existing inventory remains available for legacy system support. For new designs, select from active-status alternatives such as DF06SA-E3/77, DB105S, or ABS6U.

Q: Are there packaging considerations when switching from MDB6S to alternatives?

A: Yes. MDB6S uses 4-MicroDIP/SMD packaging. Substitutes employ various designations (4-SDIP, ABS, 4-MDI, DB-S, DBLS, DFS, SDB-1). While all maintain 4-SMD, Gull Wing configuration, specific lead spacing and package body dimensions may differ. Obtain detailed package drawings from the selected manufacturer to confirm PCB compatibility.

Q: Which substitute offers the best supply chain availability?

A: DF06SA-E3/77 (Vishay) shows the highest inventory level at 75,023 pieces. DB105S (SMC Diode Solutions) and ABS6U (SMC Diode Solutions) also maintain substantial inventory levels (19,411 and 24,540 pieces respectively), ensuring reliable long-term availability.

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