DF06ST-HF Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The DF06ST-HF is a single-phase bridge rectifier manufactured by Comchip Technology, rated for 600 V peak reverse voltage and 1 A average rectified current. This component is classified as obsolete, indicating that the original manufacturer has discontinued production. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this bridge rectifier topology.

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

Substitute Part Grouping Explanation

Substitution of the DF06ST-HF is determined by strict equivalence across the following critical parameters:

Voltage Rating: Peak reverse voltage of 600 V (maximum)
Current Rating: Average rectified current of 1 A
Forward Voltage Drop: Maximum 1.1 V at 1 A
Diode Configuration: Single-phase bridge rectifier
Technology: Standard rectifier technology
Operating Temperature Range: -55°C to 150°C junction temperature
Mounting Type: Surface mount configuration
Package Type: 4-SMD, Gull Wing form factor

All substitute parts listed maintain these electrical and mechanical specifications. Variations in reverse leakage current, packaging format (Tape & Reel vs. Cut Tape), and product status are secondary considerations that do not affect functional equivalence in the circuit application.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Ir @ Vr	Temp Range	Package	Product Status
DF06ST-HF	Comchip Technology	600 V	1 A	1.1 V @ 1 A	10 µA @ 600 V	-55°C ~ 150°C	4-SMD, Gull Wing	Obsolete
DF06S-HF	Comchip Technology	600 V	1 A	1.1 V @ 1 A	10 µA @ 600 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
ABS6-HF	Comchip Technology	600 V	1 A	1.1 V @ 1 A	5 µA @ 1000 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
ABS6U	SMC Diode Solutions	600 V	1 A	1.1 V @ 1 A	5 µA @ 600 V	-55°C ~ 150°C	4-SMD, Gull Wing	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-SMD, Gull Wing	Active
DB105S	SMC Diode Solutions	600 V	1 A	1.1 V @ 1 A	5 µA @ 600 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DBLS105G	Taiwan Semiconductor Corporation	600 V	1 A	1.1 V @ 1 A	2 µA @ 600 V	-55°C ~ 150°C	4-SMD, Gull Wing	Active
DBLS105GH	Taiwan Semiconductor Corporation	600 V	1 A	1.1 V @ 1 A	2 µA @ 600 V	-55°C ~ 150°C	4-SMD, Gull Wing	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	4-SMD, Gull Wing	Active
DF06S1	onsemi	600 V	1 A	1.1 V @ 1 A	5 µA @ 600 V	-55°C ~ 150°C	4-SMD, Gull Wing	Not For New Designs
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	4-SMD, Gull Wing	Active

Engineering Selection Recommendations

Primary Recommendation: DF06S-HF

The DF06S-HF is the manufacturer-recommended substitute from Comchip Technology. This part maintains identical electrical specifications to the DF06ST-HF while offering active product status with 995 units in stock. Selection of this part ensures continuity with the original design intent and manufacturer support.

Secondary Recommendations (Parametric Equivalents)

The following parts are parametric equivalents with active product status and full compliance certifications:

DF06S-E3/77 (Vishay General Semiconductor): 75,023 units in stock. ROHS3 compliant, REACH unaffected. Highest inventory availability.
DB105S (SMC Diode Solutions): 19,411 units in stock. ROHS3 compliant, REACH affected. Cut Tape and Digi-Reel packaging available.
ABS6U (SMC Diode Solutions): 24,540 units in stock. ROHS3 compliant, REACH affected. Largest inventory position.
B106S_R2_00001 (Panjit International Inc.): 3,820 units in stock. ROHS3 compliant, REACH unaffected. Series B1005S designation.

Automotive-Grade Option

DBLS105GH (Taiwan Semiconductor Corporation): AEC-Q101 qualified automotive-grade component. 4,055 units in stock. ROHS3 compliant, REACH unaffected. Suitable for automotive applications requiring qualification documentation.

Parts to Avoid for New Designs

DF06S1 (onsemi): Marked as "Not For New Designs." Existing inventory of 4,796 units available only for legacy support.

All recommended active parts maintain the 600 V peak reverse voltage, 1 A average rectified current, 1.1 V forward voltage drop, and -55°C to 150°C operating temperature range required for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts interchangeably with the DF06ST-HF?

A: Yes. All listed substitute parts maintain identical voltage ratings (600 V), current ratings (1 A), forward voltage characteristics (1.1 V @ 1 A), and operating temperature range (-55°C to 150°C). They are functionally equivalent in single-phase bridge rectifier applications.

Q: What is the difference between the various packaging formats listed?

A: Packaging format refers to the delivery method: Tape & Reel (TR) is standard for automated assembly lines, while Cut Tape (CT) and Digi-Reel are alternative formats. All parts use the same 4-SMD, Gull Wing physical package. Selection depends on your procurement and assembly process requirements, not circuit performance.

Q: Why do some substitute parts show lower reverse leakage current (2 µA vs. 10 µA)?

A: Lower reverse leakage current indicates improved device characteristics and does not affect substitution compatibility. Parts with lower leakage (DBLS105G, DBLS105GH) are superior in this parameter and are fully compatible replacements.

Q: What does "ROHS3 Compliant" mean?

A: ROHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates the part meets European environmental regulations restricting lead and other hazardous materials. All recommended active substitutes carry this certification.

Q: Should I select the part with the highest inventory?

A: Inventory levels support supply chain planning but do not determine technical suitability. Select based on product status (active preferred), compliance requirements (ROHS3, REACH), and availability from your supplier. DF06S-E3/77 offers the highest inventory (75,023 units) among active parts.

Q: Is the DBLS105GH automotive-grade part suitable for non-automotive applications?

A: Yes. AEC-Q101 qualification is a superset of standard requirements. The DBLS105GH can be used in any application where the DF06ST-HF was specified, with the added benefit of automotive-grade reliability documentation.

Q: What does "REACH Affected" vs. "REACH Unaffected" mean?

A: REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) is a European chemical regulation. "REACH Affected" indicates the manufacturer has registered the substance; "REACH Unaffected" indicates exemption. Both statuses are compliant. Verify your regional requirements with your procurement department.

Q: Can I use DF06S1 for new product designs?

A: No. DF06S1 is marked "Not For New Designs" by onsemi. This part is available only for legacy system support and repair. Use active-status alternatives for new designs.

Q: Are there any thermal or reliability differences between manufacturers?

A: All substitute parts maintain the same -55°C to 150°C operating temperature range and standard rectifier technology. Differences in reverse leakage current and manufacturer certifications (ROHS3, REACH, AEC-Q101) reflect process improvements, not thermal limitations. Selection should prioritize product status and compliance certifications relevant to your application.

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