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Taiwan Semiconductor Corporation 6A40G
- Part No.:
- 6A40G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- R-6, Axial
- Datasheet:
-
6A40G.pdf
- Description:
- DIODE GEN PURP 400V 6A R-6
- Quantity:
- Payment:
- Shipping:
Inventory:307
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Product details
Overview
6A40G from Taiwan Semiconductor is a 6 A, 400 V standard glass-passivated axial-lead rectifier diode in R-6 package, featuring 1.0 V forward voltage at 6 A and 250 A surge capability, used in switching-mode power supplies and DC-DC converters.
For engineers reviewing the 6A40G datasheet, 6A40G pinout, 6A40G application, or 6A40G equivalent, key selection criteria include repetitive peak reverse voltage (400 V), forward current rating (6 A), thermal resistance (35 °C/W), junction capacitance (60 pF), and AEC-Q101 qualification availability.
Technical Context
This single-die standard rectifier operates with a maximum junction temperature of 150 °C and supports continuous forward conduction up to 6 A at ambient temperatures ≤75 °C per derating curve. Its glass-passivated junction ensures stable reverse leakage (<10 µA at 25 °C) and high reliability under thermal cycling.
The R-6 package provides mechanical robustness with UL 94V-0 molding compound and pure tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker testing. Polarity is marked by cathode band on body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum repetitive reverse blocking voltage before breakdown |
| IF | 6 A - Continuous average forward current under specified thermal conditions |
| IFSM | 250 A - Non-repetitive surge current tolerance for 8.3 ms half-sine wave |
| VF @ 6 A | 1.0 V - Forward voltage drop determining conduction loss in power stage |
| RθJA | 35 °C/W - Junction-to-ambient thermal resistance defining heatsinking requirement |
| CJ | 60 pF - Junction capacitance affecting high-frequency switching behavior and EMI |
| IR @ 25°C | ≤10 µA - Reverse leakage current impacting standby power and isolation integrity |
Pinout & Package
Package: R-6 axial-leaded through-hole package with cathode band marking; lead material: pure tin-plated copper; weight ≈1.65 g; UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to lower-potential side (e.g., transformer secondary center-tap or switch node) |
| Cathode (Lead 2) | Forward current exit point | Marked with band; connects to output rail or filter capacitor positive terminal |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable long-term reverse leakage performance and humidity resistance without silicone gel encapsulation |
| Low VF (1.0 V @ 6 A) | Reduces conduction losses by ~15% vs. comparable 1.15 V diodes, improving efficiency in 12–48 V SMPS outputs |
| 250 A IFSM rating | Withstands inrush and transient surges common in industrial motor drives and UPS systems |
| AEC-Q101 qualified option | Supports automotive-grade deployment in engine control modules and body electronics where reliability validation is mandatory |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally regulated end equipment |
Applications
| AC-DC Power Adapter | Industrial Motor Drive |
|---|---|
Use Scenario: 24 V, 5 A output flyback converter in wall-mounted AC-DC adapter for IoT gateways. IC Role / Device Role / Timing Role: Output rectifier converting high-frequency transformer secondary AC to regulated DC bus. Use Value: 1.0 V VF minimizes heat generation in compact enclosure; 35 °C/W RθJA enables passive cooling without heatsink. | Use Scenario: DC bus freewheeling path in 3-phase inverter driving 0.75 kW induction motor. IC Role / Device Role / Timing Role: Snubberless freewheeling diode across IGBT collector-emitter during turn-off. Use Value: 250 A IFSM handles regenerative energy spikes; 400 V VRRM exceeds 325 V DC bus with margin. |
| Solar Microinverter | Telecom DC-DC Module |
Use Scenario: Isolated DC-DC stage stepping down PV string voltage (up to 600 V) to 12 V control rail. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier replacement in forward converter topology. Use Value: Low IR (≤10 µA) preserves MPPT accuracy; 60 pF CJ limits switching noise coupling into analog sensing circuitry. | Use Scenario: 48 V to 3.3 V intermediate bus converter in 5G baseband unit with strict EMI limits. IC Role / Device Role / Timing Role: Input rectifier in active clamp forward converter operating at 250 kHz. Use Value: Stable VF over temperature ensures predictable power loss; R-6 package allows manual rework and automated insertion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standard rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH6R04 | 6 A, 400 V, TO-220AC package; VF = 1.15 V @ 6 A; RθJA = 50 °C/W | Requires heatsink above 2 A; not axial-leaded; higher conduction loss | Prefer when board space allows TO-220 mounting and thermal management is centralized |
| ON Semi MUR640 | 6 A, 400 V, DO-201AD package; VF = 0.95 V @ 6 A; IFSM = 150 A; faster recovery | Lower VF but reduced surge margin; smaller footprint; optimized for higher-frequency SMPS | Choose when switching frequency >100 kHz and surge events are infrequent |
Compared with STTH6R04 and MUR640, the 6A40G offers superior surge robustness (250 A vs. 150–200 A), axial-leaded R-6 compatibility with legacy through-hole assembly, and balanced VF/thermal trade-off for cost-sensitive industrial power supplies.
Availability
6A40G is available at Aetrix Electronics and suitable for DC-DC converters, switching-mode inverters, and general-purpose rectification requiring stable component supply across automotive, industrial, and telecom power designs.
Supply support for 6A40G 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 Taiwanese manufacturer specializing in discrete power semiconductors, including rectifiers, TVS, MOSFETs, and IGBTs.
The 6AxxG series targets cost-effective, high-reliability rectification in mid-power industrial and automotive auxiliary systems, emphasizing rugged packaging, thermal stability, and AEC-Q101 compliance readiness.
FAQ
What is the maximum junction temperature rating for the 6A40G?
The 6A40G has a maximum junction temperature (TJ MAX) of +150 °C, validated per absolute maximum ratings table. This allows operation in high-ambient environments such as enclosed industrial enclosures or under-hood automotive locations when thermal design respects the 35 °C/W RθJA limit. Derating begins at 75 °C ambient per the forward current derating curve in the datasheet.
Does the 6A40G have AEC-Q101 qualification?
The base 6A40G is not AEC-Q101 qualified; however, the variant 6A40GH (with "H" suffix) is explicitly qualified per AEC-Q101 Rev D. This distinction is defined in the ordering information section: "H means AEC-Q101 qualified." Customers requiring automotive-grade validation must specify 6A40GH, not 6A40G.
What is the forward voltage of the 6A40G at 6 A and 125 °C junction temperature?
The datasheet specifies VF = 1.0 V maximum at IF = 6 A and TJ = 25 °C. While no exact value is given at 125 °C, typical VF increases ~2 mV/°C for silicon rectifiers; thus, VF at 125 °C is estimated at ~1.2 V. For precise thermal modeling, users should apply the device's VF vs. TJ curve from Figure 4 in the datasheet.
Can the 6A40G replace the 6A20G in a 200 V design?
No - the 6A40G is rated for 400 V VRRM and is physically identical to the 6A20G (same R-6 package, pinout, and thermal specs), but substituting it into a 200 V design does not improve performance and may increase cost unnecessarily. The 6A20G remains optimal for 200 V applications due to tighter parameter binning and lower unit cost where voltage margin is sufficient.
What is the polarity marking method for the 6A40G?
The 6A40G uses a cathode band marking on the body to indicate the cathode terminal, consistent with industry-standard axial diode convention. The banded end corresponds to the cathode (lead 2), while the unmarked end is the anode (lead 1). This marking is visible in the "MARKING DIAGRAM" section of the datasheet and aligns with JEDEC DO-41/R-6 mechanical standards.
6A40G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- R-6, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 6A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 6 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 400 V
- Capacitance @ Vr, F:
- 60pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- R-6
- Operating Temperature - Junction:
- -55°C ~ 150°C
6A40G FAQ
1.How can I place an order for 6A40G through Aetrix?
Please submit a Request for Quotation (RFQ) for 6A40G 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 6A40G reliable?
The price and inventory of 6A40G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 6A40G is usually 5 days.
3.What payment methods are accepted for 6A40G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 6A40G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 6A40G?
6A40G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 6A40G 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 6A40G?
For technical support, including 6A40G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 6A40G requirements.
6.How does Aetrix verify that 6A40G is sourced from the original manufacturer or authorized distributors?
All 6A40G 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 6A40G meets industry standards.
7.What is the process for return or replacement of 6A40G?
All 6A40G units undergo pre-shipment inspection (PSI). If there is an issue with 6A40G, 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 6A40G part is unused and in its original packaging.
Return procedure for 6A40G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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