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DB107ST-G Bridge Rectifier Equivalent & Substitute Parts
Part Overview
The DB107ST-G is a single-phase bridge rectifier diode manufactured by Comchip Technology, rated for 1 A average rectified current at 1 kV peak reverse voltage. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design requirements and production continuity. The DB107ST-G operates across a temperature range of -55°C to 150°C and is packaged in a 4-SMD, Gull Wing surface mount configuration with DBS supplier device package designation. ROHS3 compliance and unlimited moisture sensitivity level (MSL 1) are standard for this product category.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Diode Type | Single Phase | — |
| Technology | Standard | — |
| Voltage - Peak Reverse (Max) | 1 | kV |
| Current - Average Rectified (Io) | 1 | A |
| Voltage - Forward (Vf) (Max) @ If | 1.1 | V @ 1 A |
| Current - Reverse Leakage @ Vr | 10 | µA @ 1000 V |
| Operating Temperature Range | -55 to 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
Substitution of the DB107ST-G is determined by electrical and mechanical parameter equivalence. The critical parameters that define substitutability are:
- Voltage - Peak Reverse (Max): 1 kV (all substitutes must meet or exceed this rating)
- Current - Average Rectified (Io): 1 A (all substitutes must meet or exceed this rating)
- Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 1 A (all substitutes must not exceed this value)
- Operating Temperature Range: -55°C to 150°C (TJ) (all substitutes must cover this range)
- Mounting Type: Surface Mount (all substitutes must be surface mount)
- Package / Case: 4-SMD, Gull Wing (all substitutes must use this package configuration)
- RoHS Status: ROHS3 Compliant (all substitutes must maintain compliance)
Substitute parts are grouped into two categories:
MFR Recommended Substitute: DB107S-HF (Comchip Technology) — Active product status with identical electrical specifications and DBS package, available in Tube packaging.
Parametric Equivalents: Parts meeting all critical electrical and mechanical parameters with alternative supplier device packages (ABS, 4-SOPA, 4-MDI, DFS, 4-SDIP) or alternative manufacturers (Diodes Incorporated, SMC Diode Solutions, Panjit International Inc., MDD, Taiwan Semiconductor Corporation, Vishay General Semiconductor, Fairchild Semiconductor).
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Product Status | Vr (Max) kV | Io (A) | Vf (Max) V @ 1A | Ir @ Vr µA | Temp Range °C | Package / Case | Supplier Device Package | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|
| DB107ST-G | Comchip Technology | Obsolete | 1 | 1 | 1.1 @ 1 | 10 @ 1000V | -55 to 150 | 4-SMD, Gull Wing | DBS | ROHS3 Compliant |
| DB107S-HF | Comchip Technology | Active | 1 | 1 | 1.1 @ 1 | 10 @ 1000V | -55 to 150 | 4-SMD, Gull Wing | DBS | ROHS3 Compliant |
| ABS10-HF | Comchip Technology | Active | 1 | 1 | 1.1 @ 1 | 5 @ 1000V | -55 to 150 | 4-SMD, Gull Wing | ABS | ROHS3 Compliant |
| ABS10A-13 | Diodes Incorporated | Active | 1 | 1 | 1.1 @ 1 | 5 @ 1000V | -55 to 150 | 4-SMD, Gull Wing | 4-SOPA | ROHS3 Compliant |
| ABS10U | SMC Diode Solutions | Active | 1 | 1 | 1.1 @ 1 | 5 @ 1000V | -55 to 150 | 4-SMD, Gull Wing | ABS | ROHS3 Compliant |
| B1010S_R2_00001 | Panjit International Inc. | Active | 1 | 1 | 1.1 @ 1 | 5 @ 1000V | -55 to 150 | 4-SMD, Gull Wing | 4-MDI | ROHS3 Compliant |
| DB107S | MDD | Active | 1 | 1 | 1.1 @ 1 | 10 @ 1000V | -55 to 150 | 4-SMD, Gull Wing | DBS | ROHS3 Compliant |
| DBLS107GH | Taiwan Semiconductor Corporation | Active | 1 | 1 | 1.1 @ 1 | 2 @ 1000V | -55 to 150 | 4-SMD, Gull Wing | DBLS | ROHS3 Compliant |
| DF10S-E3/77 | Vishay General Semiconductor - Diodes Division | Active | 1 | 1 | 1.1 @ 1 | 5 @ 1000V | -55 to 150 | 4-SMD, Gull Wing | DFS | ROHS3 Compliant |
| DF10S1 | Fairchild Semiconductor | Active | 1 | 1 | 1.1 @ 1 | 3 @ 1V | -55 to 150 | 4-SMD, Gull Wing | 4-SDIP | Not specified |
Engineering Selection Recommendations
Primary Recommendation: DB107S-HF (Comchip Technology) is the direct manufacturer-recommended substitute. This part maintains active product status, identical electrical specifications, and DBS package compatibility with the obsolete DB107ST-G. The transition from DBS to DBS supplier device package ensures mechanical and electrical interchangeability.
Secondary Recommendations for Active Inventory:
-
DB107S (MDD): Active product with DBS package and matching reverse leakage characteristics (10 µA @ 1000V). Suitable for direct replacement in existing designs.
-
DBLS107GH (Taiwan Semiconductor Corporation): Active product with automotive-grade qualification (AEC-Q101) and superior reverse leakage performance (2 µA @ 1000V). Recommended for applications requiring enhanced reliability or automotive compliance.
Alternative Packages for Design Flexibility:
-
ABS10-HF, ABS10U (ABS package): Active products with improved reverse leakage (5 µA @ 1000V). Suitable where package footprint compatibility permits.
-
ABS10A-13 (Diodes Incorporated, 4-SOPA package): Active product with high inventory availability (20,206 pcs) and improved reverse leakage characteristics.
-
DF10S-E3/77 (Vishay General Semiconductor, DFS package): Active product with established supply chain and improved reverse leakage (5 µA @ 1000V).
-
B1010S_R2_00001 (Panjit International Inc., 4-MDI package): Active product with automotive-grade qualification and improved reverse leakage (5 µA @ 1000V).
All recommended substitutes maintain ROHS3 compliance, unlimited moisture sensitivity level (MSL 1), and operating temperature range of -55°C to 150°C (TJ).
Frequently Asked Questions (FAQ)
Q: Can DB107S-HF directly replace DB107ST-G without PCB modifications?
A: Yes. DB107S-HF maintains identical electrical specifications (1 kV, 1 A, 1.1 V forward voltage) and 4-SMD Gull Wing package configuration. Both use DBS supplier device package designation. No PCB layout changes are required.
Q: What is the difference between DBS, ABS, and DFS supplier device packages?
A: DBS, ABS, and DFS are alternative supplier device package designations for functionally equivalent 4-SMD Gull Wing bridge rectifiers. All three maintain identical 4-SMD Gull Wing mechanical footprint and electrical performance. Selection depends on manufacturer availability and supply chain requirements.
Q: Why do some substitutes show lower reverse leakage current (Ir)?
A: Lower reverse leakage current (e.g., 2 µA for DBLS107GH versus 10 µA for DB107ST-G) indicates improved device performance and reduced leakage at rated voltage. This is a beneficial characteristic that does not affect substitutability. Devices with lower reverse leakage are suitable for applications requiring enhanced reliability.
Q: Is DBLS107GH suitable for automotive applications?
A: Yes. DBLS107GH carries AEC-Q101 automotive qualification and is manufactured by Taiwan Semiconductor Corporation. This part is suitable for automotive-grade applications requiring enhanced reliability standards.
Q: What is the significance of product status (Active vs. Obsolete)?
A: Active products have ongoing manufacturer support, established supply chains, and continued production. Obsolete products (DB107ST-G) have discontinued production and limited availability. Transition to active substitutes ensures long-term design sustainability and supply chain reliability.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All recommended substitute parts maintain ROHS3 compliance, consistent with the original DB107ST-G specification. This ensures regulatory compliance for applications subject to ROHS3 requirements.
Q: Can I use DF10S1 (Fairchild Semiconductor) as a substitute?
A: DF10S1 meets all critical electrical parameters (1 kV, 1 A, 1.1 V forward voltage) and operates across the required temperature range (-55°C to 150°C). However, RoHS status is not specified for this part. Verify RoHS compliance requirements for your specific application before selection.
Q: What packaging options are available for the substitute parts?
A: Substitute parts are available in multiple packaging formats: Tube (DB107S-HF), Tape & Reel (ABS10-HF, ABS10A-13, ABS10U, B1010S_R2_00001, DBLS107GH), Cut Tape & Digi-Reel (DF10S-E3/77), and Bulk (DF10S1). Select packaging based on production volume and assembly process requirements.
Q: How do I verify mechanical compatibility before design transition?
A: All recommended substitutes use 4-SMD Gull Wing package configuration with identical mechanical footprint. Verify supplier device package designation (DBS, ABS, DFS, 4-SOPA, 4-MDI, 4-SDIP) against your PCB design files. Contact the component supplier for detailed package drawings if required.
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