SDB154-TP Bridge Rectifier Single Phase 400V 1.5A Equivalent & Substitute Parts

Part Overview

The SDB154-TP is a single-phase bridge rectifier manufactured by Micro Commercial Co, rated for 400V peak reverse voltage and 1.5A average rectified current in a 4-SMD gull wing surface mount package. This component is classified as Not For New Designs, indicating it has reached end-of-life status. Alternative equivalent parts are necessary for ongoing production, maintenance, and new design implementations where this rectifier specification is required.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	400 V
Current - Average Rectified (Io)	1.5 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1.5 A
Current - Reverse Leakage @ Vr	10 µA @ 400 V
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 SDB154-TP are classified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Voltage - Peak Reverse (Max): 400 V
Current - Average Rectified (Io): 1.5 A (or higher)
Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 1.5 A (or lower)
Mounting Type: Surface Mount
Package / Case: 4-SMD, Gull Wing
Diode Type: Single Phase
Technology: Standard

Parts are grouped into three categories:

Direct Manufacturer Substitutes maintain identical electrical specifications and packaging, differing only in manufacturer and product status.

Similar Manufacturer Substitutes meet all core electrical parameters with minor variations in operating temperature range or reverse leakage current within acceptable limits.

Parametric Equivalents satisfy the primary electrical requirements (voltage, current, forward drop) with variations in reverse leakage characteristics or specialized qualifications (automotive grade).

Parameter Comparison

Part Number	Manufacturer	Voltage - Peak Reverse (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Current - Reverse Leakage @ Vr	Operating Temperature	Product Status	RoHS Status	Packaging
SDB154-TP	Micro Commercial Co	400 V	1.5 A	1.1 V @ 1.5 A	10 µA @ 400 V	-55°C ~ 150°C	Not For New Designs	ROHS3 Compliant	Tape & Reel (TR)
DF1504S-G	Comchip Technology	400 V	1.5 A	1.1 V @ 1.5 A	10 µA @ 400 V	-55°C ~ 150°C	Active	ROHS3 Compliant	Tube
DF1504S-T	Diodes Incorporated	400 V	1.5 A	1.1 V @ 1.5 A	10 µA @ 400 V	-65°C ~ 150°C	Active	ROHS3 Compliant	Tape & Reel (TR)
DB154S	SMC Diode Solutions	400 V	1.5 A	1.1 V @ 1.5 A	5 µA @ 400 V	-55°C ~ 150°C	Active	ROHS3 Compliant	Tape & Reel (TR)
DBLS154G	Taiwan Semiconductor Corporation	400 V	1.5 A	1.1 V @ 1.5 A	2 µA @ 400 V	-55°C ~ 150°C	Active	ROHS3 Compliant	Tape & Reel (TR)
DBLS154GH	Taiwan Semiconductor Corporation	400 V	1.5 A	1.1 V @ 1.5 A	2 µA @ 400 V	-55°C ~ 150°C	Active	ROHS3 Compliant	Tape & Reel (TR)
DF04S	Vishay General Semiconductor - Diodes Division	400 V	1 A	1.1 V @ 1 A	5 µA @ 400 V	-55°C ~ 150°C	Obsolete	RoHS non-compliant	Tube
DF1504S-E3/77	Vishay General Semiconductor - Diodes Division	400 V	1.5 A	1.1 V @ 1.5 A	5 µA @ 400 V	-55°C ~ 150°C	Active	ROHS3 Compliant	Tape & Reel (TR)
DF1504ST-G	Comchip Technology	400 V	1.5 A	1.1 V @ 1.5 A	10 µA @ 400 V	-55°C ~ 150°C	Obsolete	ROHS3 Compliant	Not specified
DFL1504S-E3/77	Vishay General Semiconductor - Diodes Division	400 V	1.5 A	1.1 V @ 1.5 A	5 µA @ 400 V	-55°C ~ 150°C	Active	ROHS3 Compliant	Tape & Reel (TR)

Engineering Selection Recommendations

For Active Production and New Designs:

DF1504S-T (Diodes Incorporated) is the primary recommended substitute. It maintains identical electrical specifications to the SDB154-TP, offers the widest operating temperature range (-65°C to 150°C), carries Active product status, and is available in Tape & Reel packaging with ROHS3 compliance. Current inventory of 18,088 units ensures supply continuity.

DF1504S-E3/77 and DFL1504S-E3/77 (both Vishay General Semiconductor - Diodes Division) are secondary alternatives with Active status and ROHS3 compliance. These parts feature lower reverse leakage current (5 µA vs. 10 µA), which may provide improved performance in low-leakage applications. Both are available in Tape & Reel packaging.

DBLS154G and DBLS154GH (Taiwan Semiconductor Corporation) offer the lowest reverse leakage current (2 µA @ 400 V) among all substitutes, making them suitable for precision applications requiring minimal leakage. DBLS154GH includes AEC-Q101 automotive qualification for applications requiring automotive-grade components.

For Maintenance and Legacy Systems:

DF1504S-G (Comchip Technology) provides a direct electrical equivalent with Active product status and ROHS3 compliance, though it is supplied in Tube packaging rather than Tape & Reel.

DB154S (SMC Diode Solutions) is a parametric equivalent with Active status and ROHS3 compliance, featuring reduced reverse leakage (5 µA). However, REACH Status is listed as REACH Affected, requiring compliance verification for specific applications.

Parts to Avoid:

DF04S (Vishay) is Obsolete and RoHS non-compliant, with reduced current rating (1 A vs. 1.5 A), making it unsuitable for applications requiring the full 1.5A specification.

DF1504ST-G (Comchip Technology) is Obsolete and should not be selected for new designs or ongoing production.

Frequently Asked Questions (FAQ)

Q: Can DF04S be used as a substitute for SDB154-TP?

A: DF04S is not recommended. While it maintains the 400V voltage rating and similar forward voltage characteristics, it is rated for only 1A average rectified current compared to the SDB154-TP's 1.5A specification. Additionally, DF04S is Obsolete and RoHS non-compliant, making it unsuitable for new designs and many production environments.

Q: What is the difference between DBLS154G and DBLS154GH?

A: Both parts are electrically identical with 400V, 1.5A, and 1.1V forward voltage specifications. The primary difference is that DBLS154GH includes AEC-Q101 automotive qualification and is designated as an automotive-grade component. Select DBLS154GH for applications requiring automotive compliance; use DBLS154G for general industrial applications.

Q: Why do some substitutes have lower reverse leakage current than the SDB154-TP?

A: Reverse leakage current (specified at 10 µA for SDB154-TP) varies among manufacturers due to different semiconductor processing and quality control methods. Parts like DBLS154G (2 µA) and DF1504S-E3/77 (5 µA) represent improved performance in this parameter. Lower leakage is beneficial in precision rectification circuits but is not required for standard applications. All listed substitutes meet or exceed the SDB154-TP's electrical performance envelope.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Tape & Reel, Tube, or Cut Tape) does not affect electrical performance. Selection should be based on manufacturing equipment compatibility and supply chain requirements. Tape & Reel packaging is standard for automated assembly; Tube packaging is suitable for manual or semi-automated processes.

Q: Are all substitutes ROHS3 compliant?

A: All recommended substitutes except DF04S are ROHS3 compliant. DF04S is RoHS non-compliant and should not be used in applications requiring RoHS compliance. DB154S carries REACH Affected status, requiring compliance verification for specific regulatory jurisdictions.

Q: What is the significance of "Not For New Designs" status on the SDB154-TP?

A: This designation indicates the SDB154-TP has reached end-of-life and is no longer recommended for new product development. Existing inventory remains available for maintenance and legacy system support. For all new designs, select from the Active status substitutes listed in this document.

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