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Taiwan Semiconductor Corporation HER105G-K
- Part No.:
- HER105G-K
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
HER105G-K.pdf
- Description:
- 50NS, 1A, 400V, HIGH EFFICIENT R
- Quantity:
- Payment:
- Shipping:
Inventory:8,211
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Product details
Overview
HER105G-K from Taiwan Semiconductor is a high-efficiency, single-die, glass-passivated silicon rectifier diode rated for 1 A average forward current, 400 V repetitive peak reverse voltage (VRRM), and 1.3 V forward voltage at 1 A and 25°C, used in DC-DC converters and switching-mode power supplies.
For engineers reviewing the HER105G-K datasheet, HER105G-K pinout, HER105G-K application, or HER105G-K equivalent, key selection criteria include its 400 V VRRM rating, 50 ns reverse recovery time, 15 pF junction capacitance at 1 MHz and 4.0 V reverse bias, DO-41 package thermal resistance (RθJA = 60°C/W), and suitability for freewheeling and snubber circuits in compact power converters.
Technical Context
This device operates as a unidirectional, fast-recovery rectifier with a single PN junction fabricated using glass passivation for enhanced reliability and moisture resistance. Its 50 ns trr and low VF support high-frequency switching up to ~1 MHz in flyback and forward converter topologies.
The HER105G-K is thermally characterized with RθJC = 15°C/W and RθJA = 60°C/W, enabling 1 A continuous conduction in ambient temperatures up to 75°C without forced cooling. It meets JESD201 Class 1A whisker resistance and RoHS/halogen-free compliance per IEC 61249-2-21.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - maximum non-repetitive reverse voltage the diode blocks reliably in circuit |
| IF(AV) | 1 A - continuous forward current capability at TA ≤ 75°C with adequate PCB copper area |
| VF @ 1A, 25°C | 1.3 V - forward conduction loss contributing directly to thermal rise and efficiency drop |
| trr | 50 ns - reverse recovery time limiting usable switching frequency in hard-switched topologies |
| CJ @ 1MHz, VR=4V | 15 pF - junction capacitance affecting high-frequency noise coupling and snubber design |
| IFSM | 30 A - surge current tolerance for startup or transient overload conditions (8.3 ms half-sine) |
| TJ max | +150°C - maximum junction temperature defining safe operating area under thermal stress |
Pinout & Package
HER105G-K uses the DO-204AL (DO-41) axial-leaded through-hole package with cathode indicated by a band on the body. Leads are pure tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward current entry point | Connected to lower-potential node (e.g., switch node in flyback secondary or ground return path) |
| Cathode (banded end) | Forward current exit point | Connected to higher-potential output rail; polarity critical for rectification direction and EMI filter placement |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable long-term operation in humid or contaminated environments without hermetic sealing |
| Low VF (1.3 V @ 1A) | Reduces conduction loss by ~15% vs. standard 1N4007 (1.55 V), improving light-load efficiency |
| Fast trr (50 ns) | Supports switching frequencies up to ~1 MHz before reverse recovery losses dominate |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU directives for environmentally constrained industrial and consumer products |
| DO-41 mechanical robustness | Withstands >5 kgf axial pull force and meets UL 94V-0 flammability for safety-critical board mounting |
Applications
| DC–DC Converter Secondary Rectification | Switch-Mode Power Supply Freewheeling Diode |
|---|---|
Use Scenario: Used in the secondary side of isolated flyback or forward converters delivering 5–24 V at ≤1 A. IC Role / Device Role / Timing Role: Unidirectional current valve converting transformer AC output to regulated DC output. Use Value: 1.3 V VF minimizes conduction loss at light loads; 50 ns trr reduces switching loss and EMI during turn-off transitions. | Use Scenario: Placed across inductive windings in buck-derived topologies to provide current continuity during MOSFET off-time. IC Role / Device Role / Timing Role: Freewheeling path for inductor current when main switch is open; defines minimum off-time behavior. Use Value: Low trr prevents reverse conduction overlap with next switch cycle; DO-41 leadform allows direct through-hole mounting on high-current traces. |
| AC–DC Adapter Output Stage | Snubber Network Clamp Diode |
Use Scenario: Final rectification stage in universal-input (90–264 VAC) offline adapters powering IoT gateways or smart sensors. IC Role / Device Role / Timing Role: Output rectifier after bridge and filter, handling ripple and load transients. Use Value: 400 V VRRM provides margin over 264 VAC × √2 ≈ 373 V peak; 30 A IFSM absorbs line surge events without failure. | Use Scenario: Connected in series with RC snubber across MOSFET drain-source in flyback or LLC resonant converters. IC Role / Device Role / Timing Role: Fast clamp to limit dv/dt-induced voltage spikes during switching transitions. Use Value: 15 pF CJ ensures minimal capacitive loading on snubber node; 50 ns trr enables clean clamping without tail current oscillation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-efficiency rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1L06S | TO-220AC package, 600 V VRRM, 1.7 V VF @ 1A, 50 ns trr, 12 pF CJ | Higher voltage rating but larger footprint and higher VF; requires heatsink above 0.5 A | Prefer for 600 V systems needing higher margin; avoid where board space or thermal mass is constrained |
| ON Semi MUR105G | DO-41 package, same 400 V VRRM and 1 A IF, 1.3 V VF, 50 ns trr, but 20 pF CJ and 10 µA IR @ 25°C | Slightly higher junction capacitance increases snubber loss; higher leakage may affect standby power in ultra-low-power designs | Drop-in replacement in most layouts; verify CJ impact in >500 kHz designs or <100 µW standby targets |
Compared with STTH1L06S and MUR105G, the HER105G-K offers optimal balance of DO-41 form factor, 400 V rating, 1.3 V VF, and 15 pF CJ-making it preferred for space-constrained, 1 A, <1 MHz offline and DC–DC power stages where thermal budget and layout simplicity are prioritized.
Availability
HER105G-K is available at Aetrix Electronics and suitable for DC–DC converters, switching-mode power supplies, and freewheeling applications requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for HER105G-K 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, automotive, and industrial markets since 1979.
The HER10xG-K series was designed specifically for high-efficiency, cost-sensitive AC–DC and DC–DC power conversion, emphasizing fast recovery, low forward loss, and robust packaging for mainstream industrial and consumer power supplies.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) for HER105G-K?
The HER105G-K has a VRRM rating of 400 V, verified per Taiwan Semiconductor's B2104 datasheet. This value defines the highest instantaneous reverse voltage the diode can block repeatedly without breakdown. It provides sufficient margin for 264 VAC input-derived rails (≈373 V peak) and is confirmed in the Absolute Maximum Ratings table for the HER105G-K row specifically.
What is the forward voltage drop of HER105G-K at 1 A and 25°C?
The HER105G-K exhibits a typical forward voltage (VF) of 1.3 V at 1 A and 25°C, as specified in the Electrical Specifications table under "HER105G-K" column. This value is measured under pulsed conditions (PW = 0.3 ms) and represents conduction loss under nominal load, directly impacting thermal design and efficiency calculations in power stage modeling.
Does HER105G-K have a fast recovery time, and what is its value?
Yes, the HER105G-K is classified as a fast-recovery rectifier with a reverse recovery time (trr) of 50 ns, measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This parameter is explicitly listed in the Electrical Specifications table for HER105G-K and enables reliable operation in switching power supplies operating up to approximately 1 MHz before recovery losses dominate.
What package type does HER105G-K use, and what are its key mechanical features?
The HER105G-K uses the DO-204AL (DO-41) axial-leaded package. Key mechanical features include pure tin-plated leads compliant with J-STD-002, UL 94V-0 molding compound, cathode polarity indicated by a band, and JESD201 Class 1A whisker resistance. Its weight is approximately 0.330 g, and it supports manual or wave soldering without lead bending stress.
Is HER105G-K RoHS and halogen-free compliant?
Yes, the HER105G-K is RoHS compliant and halogen-free per IEC 61249-2-21, as stated in the FEATURES section of the official Taiwan Semiconductor datasheet (Version B2104). The "G" in the part number denotes green compound, confirming compliance with both environmental standards for industrial and consumer electronics manufacturing.
HER105G-K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 V
- Capacitance @ Vr, F:
- 15pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 150°C
HER105G-K FAQ
1.How can I place an order for HER105G-K through Aetrix?
Please submit a Request for Quotation (RFQ) for HER105G-K 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 HER105G-K reliable?
The price and inventory of HER105G-K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER105G-K is usually 5 days.
3.What payment methods are accepted for HER105G-K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER105G-K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HER105G-K?
HER105G-K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HER105G-K 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 HER105G-K?
For technical support, including HER105G-K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER105G-K requirements.
6.How does Aetrix verify that HER105G-K is sourced from the original manufacturer or authorized distributors?
All HER105G-K 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 HER105G-K meets industry standards.
7.What is the process for return or replacement of HER105G-K?
All HER105G-K units undergo pre-shipment inspection (PSI). If there is an issue with HER105G-K, 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 HER105G-K part is unused and in its original packaging.
Return procedure for HER105G-K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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