DB105ST-HF Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The DB105ST-HF is a single-phase bridge rectifier manufactured by Comchip Technology, rated for 600 V peak reverse voltage and 1 A average rectified current in a surface mount DBS package. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The DB105ST-HF remains available in inventory (712 pieces), but active alternatives ensure long-term supply chain continuity and design flexibility.

Substiute Parts

DB105ST-HF

Comchip TechnologyIn Stock: 785DB105ST-HF Datasheet

Current PartRFQ

DB105S-HF

Comchip TechnologyIn Stock: 881DB105S-HF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DB105ST-HF is determined by electrical and mechanical parameter equivalence across the following criteria:

Electrical Parameters (Critical):

• Voltage - Peak Reverse (Max): 600 V
• Current - Average Rectified (Io): 1 A
• Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 1 A
• Current - Reverse Leakage @ Vr: 10 µA @ 600 V
• Operating Temperature Range: -55°C ~ 150°C

Mechanical Parameters (Critical):

• Diode Type: Single Phase
• Technology: Standard
• Mounting Type: Surface Mount
• Package / Case: 4-SMD, Gull Wing
• Supplier Device Package: DBS

The primary substitute, DB105S-HF, maintains identical electrical and mechanical specifications while offering active product status. Additional cross-reference parts (DF06S-G, DF06S-E3/45, DB105S-G, DF06S) are listed as functional equivalents within the same parameter envelope.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: DB105S-HF

The DB105S-HF is the manufacturer-recommended equivalent for the DB105ST-HF. Both components share identical electrical specifications (600 V peak reverse voltage, 1 A average rectified current, 1.1 V forward voltage drop, 10 µA reverse leakage) and mechanical packaging (4-SMD, Gull Wing, DBS). The critical distinction is product status: DB105S-HF maintains active status with 808 pieces in inventory, whereas DB105ST-HF is classified as obsolete. Both components comply with identical export control (EAR99) and tariff classifications (HTSUS 8541.10.0080), ensuring regulatory equivalence.

Secondary Cross-Reference Parts: DF06S-G, DF06S-E3/45, DB105S-G, DF06S

These components are listed as functional equivalents within the same electrical and mechanical parameter envelope. Selection among these alternatives requires verification of specific design requirements and availability constraints not provided in this reference.

Frequently Asked Questions (FAQ)

Q: Can DB105S-HF directly replace DB105ST-HF in existing designs?

A: Yes. The DB105S-HF maintains identical electrical parameters (600 V, 1 A, 1.1 V Vf, 10 µA reverse leakage) and mechanical packaging (4-SMD, Gull Wing, DBS). Pin-for-pin and functional compatibility is established.

Q: Why is DB105ST-HF classified as obsolete?

A: Product status reflects manufacturer lifecycle decisions. The DB105S-HF serves as the active production equivalent with identical specifications.

Q: Are there temperature rating differences between DB105ST-HF and DB105S-HF?

A: Both components operate across -55°C to 150°C. The DB105S-HF specification notes junction temperature (TJ) explicitly; this represents standard thermal characterization practice and does not indicate functional difference.

Q: What is the significance of the DBS package designation?

A: DBS is the supplier device package code for the 4-SMD, Gull Wing surface mount configuration. All listed equivalents utilize this same package type, ensuring PCB footprint compatibility.

Q: Do export control classifications differ between the main part and substitutes?

A: No. Both DB105ST-HF and DB105S-HF are classified under ECCN EAR99 and HTSUS 8541.10.0080, indicating identical regulatory treatment.

Q: How do the secondary cross-reference parts (DF06S-G, DF06S-E3/45, DB105S-G, DF06S) differ from DB105S-HF?

A: These components meet the same electrical and mechanical parameter requirements. Specific differentiation requires detailed datasheet comparison beyond the scope of this equivalence reference.