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Taiwan Semiconductor Corporation HER105GH
- Part No.:
- HER105GH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
HER105GH.pdf
- Description:
- 50NS, 1A, 400V, HIGH EFFICIENT R
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
HER105GH from Taiwan Semiconductor is a high-efficiency, AEC-Q101 qualified, single-die silicon rectifier diode in DO-204AL (DO-41) package, rated for 1 A average forward current, 400 V repetitive peak reverse voltage (VRRM), and 30 A non-repetitive surge current (IFSM), used in automotive-grade DC/DC converters and freewheeling paths.
For engineers reviewing the HER105GH datasheet, HER105GH pinout, HER105GH application, or HER105GH equivalent, key selection criteria include its 400 V VRRM rating, 1.3 V typical forward voltage at 1 A/25°C, 50 ns reverse recovery time, AEC-Q101 qualification, and DO-41 mechanical compatibility with legacy through-hole power designs.
Technical Context
This device operates as a unidirectional, fast-recovery rectifier optimized for switching-mode power supplies where low conduction loss and controlled reverse recovery are critical. Its glass-passivated junction ensures stable performance across -55°C to +150°C junction temperature range and supports high-reliability automotive applications.
The HER105GH delivers 15 °C/W junction-to-case thermal resistance and 60 °C/W junction-to-ambient resistance under standard PCB mounting conditions, enabling efficient heat dissipation without heatsinking in moderate-power freewheeling or output rectification roles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - maximum repetitive reverse voltage the diode blocks without breakdown; defines safe operating margin in 28 V or 48 V automotive DC/DC outputs. |
| IF(AV) | 1 A - continuous average forward current capability at TA = 75°C; suitable for low-to-moderate power rectification up to ~15 W. |
| VF @ 1A, 25°C | 1.3 V typical - forward voltage drop determines conduction loss (1.3 W at 1 A); lower than standard PN diodes for improved efficiency. |
| trr | 50 ns max - reverse recovery time governs switching loss and EMI in SMPS; enables operation up to ~200 kHz with minimal tail current. |
| IFSM | 30 A - peak surge current handling for transient load events or startup surges; supports robustness in automotive cold-crank scenarios. |
| TJ max | +150 °C - maximum junction temperature rating; allows operation in engine-bay environments with proper board thermal design. |
| CJ @ 4V, 1MHz | 15 pF - junction capacitance affects high-frequency noise coupling and snubber design; low value reduces capacitive loading on switching nodes. |
Pinout & Package
Package: DO-204AL (DO-41), axial-leaded, glass-passivated silicon rectifier with cathode band marking. Lead finish: pure tin, solderable per J-STD-002. Weight: 0.330 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward current entry point | Connected to lower-potential side of circuit (e.g., switch node or transformer secondary center-tap). |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Connected to output rail or filter capacitor; polarity marking prevents reverse installation in high-reliability assemblies. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive power electronics including engine control units and body electronics requiring zero-defect reliability. |
| Glass passivated junction | Eliminates moisture-induced leakage and surface degradation, ensuring long-term stability in humid or thermally cycled environments. |
| Low VF and fast trr | Reduces both conduction and switching losses simultaneously-critical for high-efficiency 12 V–48 V DC/DC stages in ADAS modules. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS directives; supports environmentally regulated industrial and automotive supply chains. |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal stress, eliminating latent short-circuit risk in sealed automotive enclosures. |
Applications
| Automotive DC/DC Converters | Industrial Switch-Mode Inverters |
|---|---|
Use Scenario: Step-down conversion from 48 V battery to 12 V auxiliary rail in mild-hybrid vehicles. IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous buck converter topology. Use Value: HER105GH's 400 V VRRM provides 2× safety margin over 48 V nominal input transients; 1.3 V VF minimizes power loss at 1 A load. | Use Scenario: Freewheeling path across inductive loads in motor drive H-bridge output stages. IC Role / Device Role / Timing Role: Clamp diode absorbing inductive kickback energy during MOSFET turn-off. Use Value: 50 ns trr limits voltage overshoot and EMI generation; 30 A IFSM withstands repeated motor stall currents. |
| Telecom Power Supplies | LED Driver Secondary Rectification |
Use Scenario: Secondary-side rectification in isolated 48 V telecom brick supplies delivering 3.3 V/5 V logic rails. IC Role / Device Role / Timing Role: High-voltage output rectifier in forward or flyback converter secondary winding. Use Value: HER105GH's 15 pF CJ reduces high-frequency noise coupling into sensitive communication circuits; DO-41 footprint simplifies manual rework. | Use Scenario: Constant-current LED string rectification in outdoor lighting with 24–36 V input. IC Role / Device Role / Timing Role: Main AC/DC or DC/DC output rectifier feeding constant-current regulator ICs. Use Value: AEC-Q101 qualification ensures longevity under outdoor thermal cycling; 150 °C TJ max supports enclosed fixture operation without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-efficiency rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R04 | Same DO-41 package, 400 V VRRM, but 1.25 V VF typ @ 1 A and 35 ns trr; not AEC-Q101 qualified. | Preferred for cost-sensitive industrial SMPS where automotive qualification is unnecessary. | Select STTH1R04 when faster recovery and slightly lower VF are prioritized over automotive compliance. |
| ON Semi MUR1040 | DO-41, 400 V VRRM, 1.2 V VF typ @ 1 A, 50 ns trr; AEC-Q101 qualified; halogen-free per same standard. | Drop-in replacement with identical qualification and thermal specs; minor VF improvement. | Choose MUR1040 if dual-sourcing from ON Semi is required for supply chain resilience. |
Compared with STTH1R04 and MUR1040, the HER105GH offers identical VRRM and trr but distinguishes itself via Taiwan Semiconductor's specific AEC-Q101 test report structure and JESD201 Class 2 whisker validation-key for Tier-1 automotive procurement audits.
Availability
HER105GH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial switching inverters, and telecom power supplies requiring stable component supply with full AEC-Q101 traceability and DO-41 through-hole compatibility.
Supply support for HER105GH 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, specializing in high-reliability rectifiers, TVS diodes, and power MOSFETs.
The HER series was designed specifically for automotive and industrial power conversion systems demanding AEC-Q101 compliance, low VF, and fast recovery-targeting next-generation 48 V architectures and compact SMPS designs.
FAQ
What is the peak repetitive reverse voltage rating for HER105GH?
The HER105GH has a repetitive peak reverse voltage (VRRM) rating of 400 V. This value is defined in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version L2104) and represents the maximum reverse voltage the device can block repeatedly without breakdown under normal operating conditions. It provides a 2× safety margin for use in 24 V or 48 V automotive systems experiencing load dump transients.
Is HER105GH suitable for automotive applications?
Yes, HER105GH is AEC-Q101 qualified, meaning it has passed stress tests for temperature cycling, humidity bias, high-temperature operating life, and mechanical shock required for automotive power electronics. Its glass-passivated junction, JESD201 Class 2 whisker resistance, and -55°C to +150°C operating range make HER105GH appropriate for engine control units, body controllers, and ADAS power supplies.
What is the forward voltage drop of HER105GH at 1 A and 25°C?
The typical forward voltage (VF) of HER105GH is 1.3 V at 1 A forward current and 25°C junction temperature, as specified in the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and reflects conduction loss behavior in real-world switching applications. At higher temperatures, VF decreases slightly due to semiconductor physics.
Does HER105GH have a defined reverse recovery time?
Yes, HER105GH has a maximum reverse recovery time (trr) of 50 ns, tested at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This parameter is critical for minimizing switching losses and EMI in high-frequency DC/DC converters. The 50 ns trr places HER105GH in the fast-recovery category, distinguishing it from standard PN rectifiers with trr > 500 ns.
What package type does HER105GH use and what are its key mechanical features?
HER105GH uses the DO-204AL (DO-41) axial-leaded package. Key mechanical features include glass passivation for junction protection, pure tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 molding compound, cathode band polarity marking, and a mass of approximately 0.330 g. These features ensure robust through-hole assembly and long-term reliability in thermally demanding environments.
HER105GH 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 150°C
HER105GH FAQ
1.How can I place an order for HER105GH through Aetrix?
Please submit a Request for Quotation (RFQ) for HER105GH 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 HER105GH reliable?
The price and inventory of HER105GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER105GH is usually 5 days.
3.What payment methods are accepted for HER105GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER105GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HER105GH?
HER105GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HER105GH 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 HER105GH?
For technical support, including HER105GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER105GH requirements.
6.How does Aetrix verify that HER105GH is sourced from the original manufacturer or authorized distributors?
All HER105GH 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 HER105GH meets industry standards.
7.What is the process for return or replacement of HER105GH?
All HER105GH units undergo pre-shipment inspection (PSI). If there is an issue with HER105GH, 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 HER105GH part is unused and in its original packaging.
Return procedure for HER105GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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