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Taiwan Semiconductor Corporation DBL204G-T
- Part No.:
- DBL204G-T
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Bridge Rectifiers
- Package:
- 4-DIP (0.300", 7.62mm)
- Datasheet:
-
DBL204G-T.pdf
- Description:
- BRIDGE RECT 1PHASE 400V 2A DBL
- Quantity:
- Payment:
- Shipping:
Inventory:4,124
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Product details
Overview
DBL204G-T from Taiwan Semiconductor is a 2A, 400V standard quad bridge rectifier in DBL package, featuring 50A peak surge current capability, 1.15V max forward voltage per diode at 2A, and 150°C maximum junction temperature. It is designed for AC/DC conversion in compact power supplies.
For engineers reviewing the DBL204G-T datasheet, DBL204G-T pinout, DBL204G-T application, or DBL204G-T equivalent, key selection factors include repetitive peak reverse voltage (400V), thermal resistance (RθJL = 15°C/W), RoHS/halogen-free compliance, and UL recognition (E-326854).
Technical Context
The DBL204G-T integrates four silicon diodes in a single-phase full-wave bridge configuration with common-cathode and common-anode terminals externally accessible. Its DBL molded plastic package supports surface-mount assembly and meets UL 94V-0 flammability rating.
Thermal performance is defined by RθJL = 15°C/W and RθJA = 40°C/W, enabling reliable operation up to 150°C junction temperature. Reverse leakage remains ≤2 µA at 25°C and ≤500 µA at 125°C under rated VRRM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum repetitive reverse voltage per diode; defines safe AC input voltage ceiling (e.g., ≤280 VRMS) |
| IF | 2 A - Continuous average forward current; determines steady-state power handling in SMPS output stage |
| IFSM | 50 A - Non-repetitive surge current (8.3 ms half-sine); supports inrush tolerance during cold start |
| VF (max) | 1.15 V - Forward voltage per diode at 2 A and 25°C; directly impacts conduction loss and thermal rise |
| RθJL | 15 °C/W - Junction-to-lead thermal resistance; enables direct heatsinking via PCB copper pour or lead frame |
| TJ(max) | 150 °C - Maximum allowable junction temperature; sets upper limit for ambient + power dissipation design margin |
Pinout & Package
Package: DBL - Molded plastic, UL 94V-0 rated, matte tin-plated leads, 0.360 g weight, polarity marked on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ~AC1 | AC input terminal 1 | One leg of AC input; connects to transformer secondary or EMI filter output |
| ~AC2 | AC input terminal 2 | Second leg of AC input; completes full-wave bridge input path |
| +DC | Positive DC output | Common anode node; delivers rectified positive rail to bulk capacitor |
| –DC | Negative DC output | Common cathode node; serves as circuit ground reference for output stage |
Key Features
| Feature | Design Value |
|---|---|
| UL Recognized (E-326854) | Validates safety compliance for end-equipment certification in North America |
| RoHS & Halogen-free (IEC 61249-2-21) | Meets environmental regulations for consumer and industrial electronics manufacturing |
| 50 A IFSM surge rating | Withstands high-energy transients without failure during power-up or line disturbances |
| J-STD-002 solderable leads | Ensures robust reflow and hand-solder joint integrity on PCBs |
| 150°C TJ(max) | Supports operation in thermally constrained enclosures without derating below 2 A |
Applications
| SMPS Primary-Side Rectification | LED Driver Input Stage |
|---|---|
Use Scenario: Converts 100–277 VAC mains to DC bus in offline flyback or forward converters. IC Role / Device Role / Timing Role: Quad bridge rectifier providing full-wave AC-to-DC conversion before PFC or PWM controller stage. Use Value: 400 V VRRM and 50 A IFSM ensure reliability across universal input ranges and surge events. | Use Scenario: Rectifies AC input in constant-current LED drivers for commercial lighting fixtures. IC Role / Device Role / Timing Role: Front-end bridge delivering stable DC to buck or linear LED current regulators. Use Value: Low 1.15 V VF minimizes conduction loss and thermal load in enclosed luminaires. |
| Laptop Adapter Secondary Output | Industrial Control Power Supply |
Use Scenario: Provides isolated DC output in compact external AC/DC adapters rated ≤65 W. IC Role / Device Role / Timing Role: Final-stage rectifier converting transformer secondary AC to low-voltage DC for regulation. Use Value: DBL package footprint and 0.360 g weight support miniaturized, cost-sensitive adapter designs. | Use Scenario: Supplies auxiliary 5 V/12 V rails in PLC or HMI power modules operating in harsh environments. IC Role / Device Role / Timing Role: Robust AC input rectifier with –55°C to +150°C storage/junction range. Use Value: UL recognition and JESD201 Class 1A whisker resistance ensure long-term field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GBU2K-E3/51 (Vishay) | Same 2 A / 400 V rating, but GBU package (larger footprint, higher RθJA = 50°C/W) | Less suitable for ultra-compact layouts; requires more PCB area and thermal relief | Choose when legacy GBU footprint compatibility is required over size optimization |
| GBU2J (ON Semiconductor) | Identical DBL-equivalent mechanical outline, but rated at 600 V VRRM; otherwise matches IF, IFSM, and VF | Over-spec'd reverse voltage margin may be unnecessary in 230 VAC-only systems | Prefer for designs needing future-proofing against higher-line-voltage variants or transient spikes |
Compared with GBU2K-E3/51, DBL204G-T offers superior thermal efficiency (RθJL = 15°C/W vs. ~25°C/W) and smaller footprint; versus GBU2J, it provides tighter voltage matching for 400 V–rated applications while reducing cost and BOM complexity.
Availability
DBL204G-T is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and industrial control power modules requiring stable component supply and RoHS-compliant sourcing.
Supply support for DBL204G-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global power and protection markets since 1979.
The DBL series was developed specifically for cost-sensitive, high-volume AC/DC front-end rectification in consumer and industrial power supplies, emphasizing reliability, regulatory compliance, and manufacturability.
FAQ
What is the maximum continuous forward current rating for DBL204G-T?
The DBL204G-T is rated for 2 A average forward current (IF) at 25°C ambient with adequate heatsinking. Derating is required above 25°C per the forward current derating curve in the datasheet; at 75°C ambient, usable current drops to approximately 1.4 A. This rating applies to the entire bridge, not per diode.
Does DBL204G-T have UL recognition, and what is the file number?
Yes, DBL204G-T is UL Recognized under file number E-326854. This certification confirms compliance with UL 60747-4 for semiconductor devices and supports end-product safety approvals in North American markets. The marking "G" on the device denotes green (halogen-free) compound per IEC 61249-2-21.
What is the forward voltage drop of DBL204G-T at rated current?
The DBL204G-T exhibits a maximum forward voltage of 1.15 V per diode at IF = 2 A and TJ = 25°C, measured under pulsed conditions (PW = 0.3 ms). Total bridge conduction loss at full load is approximately 2.3 V, directly impacting efficiency and thermal design in high-density power supplies.
Can DBL204G-T be used in place of DBL205G-T or DBL206G-T?
No - DBL204G-T is rated for 400 V VRRM, whereas DBL205G-T and DBL206G-T are rated for 600 V and 800 V respectively. Substituting DBL204G-T in circuits designed for higher reverse voltage risks premature breakdown. Always match VRRM to the peak AC input voltage plus safety margin.
What does the "-T" suffix indicate in DBL204G-T?
The "-T" suffix in DBL204G-T denotes tube packaging: 50 units per tube. This is the standard ordering option for DBL204G-T; tape-and-reel (e.g., -TR) is not offered for this variant. The "G" indicates halogen-free molding compound compliant with IEC 61249-2-21.
DBL204G-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- 4-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Diode Type:
- Single Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 400 V
- Current - Average Rectified (Io):
- 2 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.15 V @ 2 A
- Current - Reverse Leakage @ Vr:
- 2 µA @ 400 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DBL
DBL204G-T FAQ
1.How can I place an order for DBL204G-T through Aetrix?
Please submit a Request for Quotation (RFQ) for DBL204G-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DBL204G-T reliable?
The price and inventory of DBL204G-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DBL204G-T is usually 5 days.
3.What payment methods are accepted for DBL204G-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DBL204G-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DBL204G-T?
DBL204G-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DBL204G-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DBL204G-T?
For technical support, including DBL204G-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DBL204G-T requirements.
6.How does Aetrix verify that DBL204G-T is sourced from the original manufacturer or authorized distributors?
All DBL204G-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DBL204G-T meets industry standards.
7.What is the process for return or replacement of DBL204G-T?
All DBL204G-T units undergo pre-shipment inspection (PSI). If there is an issue with DBL204G-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DBL204G-T part is unused and in its original packaging.
Return procedure for DBL204G-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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