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Taiwan Semiconductor Corporation DBL154G-T
- Part No.:
- DBL154G-T
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Bridge Rectifiers
- Package:
- 4-DIP (0.300", 7.62mm)
- Datasheet:
-
DBL154G-T.pdf
- Description:
- BRIDGE RECT 1PHASE 400V 1.5A DBL
- Quantity:
- Payment:
- Shipping:
Inventory:4,915
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Product details
Overview
DBL154G-T from Taiwan Semiconductor is a 1.5A, 400V standard quad bridge rectifier in DBL package, featuring 50A peak surge current, 1.1V max forward voltage per diode at 1.5A, and 2µA max reverse leakage at 25°C - used in AC/DC front-end stages of compact switching power supplies.
For engineers reviewing the DBL154G-T datasheet, DBL154G-T pinout, DBL154G-T application, or DBL154G-T equivalent, key selection criteria include VRRM=400V, IF=1.5A, IFSM=50A, thermal resistance RθJA=40°C/W, and UL recognition E-326854 for safety-compliant board-level integration.
Technical Context
The DBL154G-T integrates four silicon diodes in a single-phase full-wave bridge configuration with common-cathode/common-anode topology. Its DBL molded plastic package supports surface-mount assembly and meets UL 94V-0 flammability rating.
Designed for line-frequency and high-frequency rectification, it delivers stable performance across -55°C to +150°C junction temperature range, with 15°C/W junction-to-lead thermal resistance enabling efficient heat transfer to PCB copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum repetitive reverse voltage the device withstands without breakdown during AC line cycling |
| IF (AV) | 1.5 A - Average forward current capability under specified thermal conditions, defining continuous DC output rating |
| IFSM | 50 A - Peak non-repetitive surge current tolerance for 8.3 ms half-sine, critical for inrush protection in SMPS |
| VF (max) | 1.1 V @ 1.5A, 25°C - Forward voltage drop per diode, directly impacting conduction loss and thermal design |
| IR (max) | 2 µA @ 400V, 25°C - Reverse leakage current per diode, affecting standby power and isolation integrity |
| RθJA | 40 °C/W - Junction-to-ambient thermal resistance, determining required PCB copper area for thermal management |
| TJ max | +150 °C - Maximum allowable junction temperature, setting upper limit for derating curves and reliability margin |
Pinout & Package
Package: DBL - Molded plastic, 4-terminal single-phase bridge rectifier with matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 1A whisker testing. Weight: 0.360 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ~AC1 | AC input terminal 1 | One leg of AC input; connects to primary-side transformer or EMI filter output |
| ~AC2 | AC input terminal 2 | Second leg of AC input; completes full-wave bridge AC path |
| +DC | Positive DC output | Rectified positive rail; feeds bulk capacitor and downstream converter stage |
| -DC | Negative DC output / common return | Rectified negative rail; serves as system ground reference for DC bus |
Key Features
| Feature | Design Value |
|---|---|
| UL Recognized | File #E-326854 - Enables regulatory approval of end equipment without additional component-level safety testing |
| RoHS & Halogen-free | Complies with IEC 61249-2-21 - Supports environmental compliance and lead-free reflow processing |
| High surge capability | 50A IFSM - Withstands repeated cold-start surges in universal-input adapters and lighting drivers |
| Low thermal resistance | RθJL = 15°C/W - Facilitates direct heat transfer to PCB copper, reducing need for external heatsinks |
| Molded plastic construction | UL 94V-0 rated compound - Provides mechanical robustness and flame retardancy on densely populated boards |
Applications
| Switching Mode Power Supply (SMPS) | AC/DC Adapters |
|---|---|
Use Scenario: Front-end rectification in 10–65W offline flyback converters with universal AC input (85–265VAC). IC Role / Device Role / Timing Role: Quad bridge rectifier converting AC line to pulsating DC for bulk capacitor charging. Use Value: 400V VRRM provides 2× safety margin over 265VAC peak (375V), ensuring reliable operation under line transients. | Use Scenario: Compact wall-mounted chargers for consumer electronics requiring low-profile, cost-sensitive rectification. IC Role / Device Role / Timing Role: Primary-side AC/DC conversion element mounted directly on double-sided PCB with minimal footprint. Use Value: DBL package enables <10 mm² board area usage and supports automated placement with J-STD-002 solderable leads. |
| LED Lighting Drivers | Industrial Control Power Supplies |
Use Scenario: Constant-voltage LED drivers for commercial downlights operating from 120/230VAC mains. IC Role / Device Role / Timing Role: Input-stage bridge rectifier feeding buck or buck-boost PFC-less topology. Use Value: 2µA IR at 25°C minimizes no-load power loss, supporting Energy Star Tier 2 standby requirements. | Use Scenario: Auxiliary power supply in PLC modules and motor drives where long-term reliability under thermal stress is critical. IC Role / Device Role / Timing Role: Mains-fed rectifier supplying isolated bias rails for gate drivers and logic circuitry. Use Value: 150°C TJ max and -55°C to +150°C storage range ensure operational stability in unventilated enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GBU4K | 4A rating, 800V VRRM, larger GBU package (10.5 × 14.2 mm vs DBL's 8.1 × 6.2 mm) | Suitable for higher-power SMPS (>30W) but requires PCB layout change | Select when higher current headroom or extended voltage margin is needed; not drop-in |
| GBU4D | Same 400V VRRM and 1.5A rating, but GBU package with different pin spacing and thermal profile | Compatible in function but needs footprint adaptation; RθJA ≈ 50°C/W vs DBL's 40°C/W | Choose if GBU footprint already exists; expect ~10°C higher junction temp at same load |
Compared with GBU4K and GBU4D, the DBL154G-T offers superior board-area efficiency and lower thermal resistance in a UL-recognized, halogen-free package - making it optimal for space-constrained, thermally sensitive, and compliance-driven designs below 20W.
Availability
DBL154G-T is available at Aetrix Electronics and suitable for switching mode power supplies, AC/DC adapters, and LED lighting drivers requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for DBL154G-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, industrial, and consumer markets since 1979.
The DBL series was developed specifically for cost-sensitive, high-volume AC/DC rectification applications demanding UL recognition, compact packaging, and robust surge handling - targeting adapter, lighting, and auxiliary power segments.
FAQ
What is the maximum junction temperature rating for DBL154G-T?
The DBL154G-T has a maximum junction temperature (TJ max) of +150°C, verified per absolute maximum ratings table. This allows operation in high-ambient environments such as enclosed LED drivers or industrial control units. Derating begins above 25°C ambient, following the forward current derating curve in the datasheet. Thermal design must ensure actual TJ stays below 150°C under worst-case load and ambient conditions to maintain reliability and lifetime of DBL154G-T.
Is DBL154G-T RoHS and halogen-free compliant?
Yes, DBL154G-T is RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the official Taiwan Semiconductor specification document. The molding compound contains no brominated or chlorinated flame retardants, and all terminals are matte tin-plated to meet lead-free soldering requirements. This compliance supports export to EU, China, and other regulated markets and ensures compatibility with Pb-free reflow profiles used for DBL154G-T assembly.
What does the "G" suffix in DBL154G-T signify?
The "G" in DBL154G-T indicates green (halogen-free) compound per Taiwan Semiconductor's ordering nomenclature. It is part of the marking code "DBL154G", where "DBL" denotes package type, "154" specifies 400V rating, and "G" confirms halogen-free material compliance. The "-T" suffix denotes tube packaging (50 pcs/tube). This coding is consistent across the DBL15xG-T family and is laser-marked on each DBL154G-T unit.
Does DBL154G-T have UL recognition, and what is the file number?
Yes, DBL154G-T is UL Recognized with file number E-326854, as stated in the official Taiwan Semiconductor datasheet. This recognition covers the DBL package and applies to the entire DBL154G-T through DBL157G-T series. UL recognition validates the device's electrical insulation, flammability (UL 94V-0), and construction integrity - enabling faster end-product safety certification when using DBL154G-T in Class II power supplies.
What is the typical forward voltage drop of DBL154G-T at rated current?
The DBL154G-T has a maximum forward voltage (VF) of 1.1 V per diode at IF = 1.5 A and TJ = 25°C, as specified in the electrical characteristics table. Typical VF is lower (data not published), but design must use the 1.1 V max value for worst-case power loss calculation: total conduction loss = 2 × VF × IF = 3.3 W at full load. This value is measured under pulse conditions (PW = 0.3 ms) to avoid self-heating effects during test, reflecting real DBL154G-T behavior in switching applications.
DBL154G-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):
- 1.5 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 1.5 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
DBL154G-T FAQ
1.How can I place an order for DBL154G-T through Aetrix?
Please submit a Request for Quotation (RFQ) for DBL154G-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 DBL154G-T reliable?
The price and inventory of DBL154G-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DBL154G-T is usually 5 days.
3.What payment methods are accepted for DBL154G-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DBL154G-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DBL154G-T?
DBL154G-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DBL154G-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 DBL154G-T?
For technical support, including DBL154G-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DBL154G-T requirements.
6.How does Aetrix verify that DBL154G-T is sourced from the original manufacturer or authorized distributors?
All DBL154G-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 DBL154G-T meets industry standards.
7.What is the process for return or replacement of DBL154G-T?
All DBL154G-T units undergo pre-shipment inspection (PSI). If there is an issue with DBL154G-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 DBL154G-T part is unused and in its original packaging.
Return procedure for DBL154G-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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