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Taiwan Semiconductor Corporation HER155GH
- Part No.:
- HER155GH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
HER155GH.pdf
- Description:
- 50NS, 1.5A, 400V, HIGH EFFICIENT
- Quantity:
- Payment:
- Shipping:
Inventory:3,500
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Product details
Overview
HER155GH from Taiwan Semiconductor is a high-efficiency, AEC-Q101 qualified silicon rectifier diode in DO-204AC (DO-15) package, rated for 1.5A average forward current, 400V repetitive peak reverse voltage (VRRM), and 50A surge current (IFSM). It delivers low forward voltage drop (1.3V at 1.5A, 25°C) and fast reverse recovery time (50 ns), making it suitable for freewheeling and switching-mode power supply output rectification.
For engineers reviewing the HER155GH datasheet, HER155GH pinout, HER155GH application, or HER155GH equivalent, key selection criteria include its AEC-Q101 qualification, 400V VRRM, 1.3V VF at rated current, 50 ns trr, and DO-15 mechanical compatibility in automotive and industrial DC-DC converters.
Technical Context
This device is a single-die, glass-passivated, planar junction silicon rectifier optimized for high-efficiency switching applications. Its 400V VRRM and 50 ns reverse recovery time enable reduced switching losses in high-frequency converters, while the 1.3V forward voltage minimizes conduction loss at 1.5A DC load.
The HER155GH operates across –55°C to +150°C junction temperature range and features pure tin-plated leads compliant with J-STD-002 solderability. Its 60°C/W junction-to-ambient thermal resistance supports reliable operation under natural convection in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum non-repetitive reverse voltage the diode blocks without breakdown |
| IF | 1.5 A - Continuous average forward current rating at 75°C case temperature |
| IFSM | 50 A - Peak non-repetitive surge current (8.3 ms half-sine) for transient overload handling |
| VF | 1.3 V @ 1.5 A, 25°C - Forward voltage drop determining conduction loss and thermal rise |
| trr | 50 ns @ IF=0.5A, IR=1.0A, Irr=0.25A - Reverse recovery time affecting switching loss in SMPS |
| CJ | 35 pF @ 1 MHz, VR=4.0V - Junction capacitance influencing high-frequency noise and snubber design |
| TJ max | +150°C - Maximum allowable junction temperature defining thermal derating envelope |
Pinout & Package
HER155GH uses the DO-204AC (DO-15) axial-leaded package with cathode indicated by a band on the body. Leads are pure tin-plated and solderable per J-STD-002. Polarity is unambiguous: banded end = cathode, unbanded end = anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connects to lower-potential side of rectified path; must withstand 1.5A continuous and 50A surge |
| Cathode | Forward current exit / reverse voltage blocking terminal | Banded end; connects to output rail; blocks up to 400V reverse bias during off-state |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive power electronics including engine control and ADAS subsystems |
| Glass passivated junction | Enhanced moisture resistance and long-term stability under thermal cycling and humidity stress |
| Low VF (1.3V) | Reduces power dissipation by ~20% vs. standard 1N4007 at 1.5A, lowering heatsink requirements |
| Fast trr (50 ns) | Enables operation up to ~200 kHz in flyback and forward converters without excessive switching loss |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive for environmentally constrained designs |
Applications
| Automotive DC-DC Converters | Industrial Switch-Mode Power Supplies |
|---|---|
Use Scenario: Secondary-side rectification in 12V-to-5V/3.3V isolated buck-boost converters for infotainment and body control modules. IC Role / Device Role / Timing Role: High-efficiency output rectifier replacing slower diodes to reduce heat and improve efficiency. Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle life; 1.3V VF cuts conduction loss by 0.2W vs. legacy 1N5408 at 1.5A. | Use Scenario: Output stage rectification in 48V input telecom and industrial SMPS delivering 12–24V outputs. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous rectifier auxiliary paths and OR-ing circuits. Use Value: 50 ns trr prevents cross-conduction loss with MOSFET switches; DO-15 footprint enables direct replacement in legacy designs. |
| LED Driver Flyback Outputs | UPS and Inverter Auxiliary Supplies |
Use Scenario: Rectifying high-frequency flyback transformer output in constant-current LED drivers for street lighting. IC Role / Device Role / Timing Role: Primary output rectifier handling pulsed 1.5A loads with minimal voltage overshoot. Use Value: 400V VRRM accommodates reflected voltage spikes; 35pF CJ limits EMI generation during turn-off. | Use Scenario: Input rectification for standby 5V/12V auxiliary supplies in online UPS systems. IC Role / Device Role / Timing Role: Bridge or single-diode rectifier converting AC line or inverter output to DC bus. Use Value: 50A IFSM withstands inrush surges during battery switchover; UL 94V-0 molding compound meets safety standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-efficiency rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-HER155G | Same VRRM (400V), IF (1.5A), and DO-15 package; VF = 1.3V (typ), trr = 50 ns - identical electrical specs | No AEC-Q101 qualification; intended for industrial/commercial use only | Select VS-HER155G where automotive qualification is not required and cost sensitivity is higher |
| ON Semiconductor MUR1540 | VRRM = 400V, IF = 1.5A, DO-15, but trr = 75 ns (slower), VF = 1.25V (slightly lower) | Not AEC-Q101 qualified; higher reverse recovery loss in >100 kHz designs | Choose MUR1540 only if lower VF is prioritized over switching speed and automotive compliance is unnecessary |
Compared with VS-HER155G and MUR1540, the HER155GH uniquely combines AEC-Q101 qualification, 400V/1.5A rating, 1.3V VF, and 50 ns trr in DO-15 - making it the only drop-in solution for automotive-grade, high-frequency rectification where reliability and efficiency are jointly critical.
Availability
HER155GH is available at Aetrix Electronics and suitable for automotive power conversion, industrial SMPS design, and LED driver development requiring stable component supply and long-term lifecycle support.
Supply support for HER155GH 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 power devices, rectifiers, and protection components.
The HER15xG series was designed specifically for high-efficiency, high-reliability rectification in automotive and industrial switching power supplies - emphasizing AEC-Q101 compliance, low VF, and fast recovery performance.
FAQ
What is the peak repetitive reverse voltage rating for HER155GH?
The HER155GH has a repetitive peak reverse voltage (VRRM) rating of 400 V. This value is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version I2105), where HER155G is explicitly listed under the 400 V column. Exceeding this voltage risks avalanche breakdown and permanent damage to the HER155GH.
Is HER155GH suitable for automotive applications?
Yes, HER155GH is AEC-Q101 qualified, as indicated by the "H" suffix in its ordering code per Taiwan Semiconductor's documentation. This certification validates its robustness for automotive power electronics, including under-hood environments with extended temperature cycling, vibration, and humidity exposure - a key differentiator versus non-H variants like HER155G.
What is the forward voltage drop of HER155GH at full rated current?
The HER155GH exhibits a maximum forward voltage (VF) of 1.3 V at 1.5 A and 25°C junction temperature, per the Electrical Specifications table. At elevated temperatures (e.g., 125°C), VF decreases slightly due to semiconductor physics, but system-level thermal design must ensure the HER155GH stays within its 150°C TJ limit.
Does HER155GH have a defined reverse recovery time?
Yes, the HER155GH has a typical reverse recovery time (trr) of 50 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This parameter is specified in the Electrical Specifications section and distinguishes HER155GH from slower general-purpose rectifiers such as 1N4007, enabling efficient operation in high-frequency switchers.
What package type does HER155GH use, and how is polarity marked?
The HER155GH uses the DO-204AC (DO-15) axial-leaded package. Polarity is marked by a visible cathode band on the body - the banded end is the cathode terminal, and the opposite end is the anode. This marking aligns with JEDEC standards and is verified in the Mechanical Data and Marking Diagram sections of the Taiwan Semiconductor datasheet.
HER155GH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AC, DO-15, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 1.5A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 1.5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 V
- Capacitance @ Vr, F:
- 35pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
- Operating Temperature - Junction:
- -55°C ~ 150°C
HER155GH FAQ
1.How can I place an order for HER155GH through Aetrix?
Please submit a Request for Quotation (RFQ) for HER155GH 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 HER155GH reliable?
The price and inventory of HER155GH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER155GH is usually 5 days.
3.What payment methods are accepted for HER155GH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER155GH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HER155GH?
HER155GH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HER155GH 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 HER155GH?
For technical support, including HER155GH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER155GH requirements.
6.How does Aetrix verify that HER155GH is sourced from the original manufacturer or authorized distributors?
All HER155GH 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 HER155GH meets industry standards.
7.What is the process for return or replacement of HER155GH?
All HER155GH units undergo pre-shipment inspection (PSI). If there is an issue with HER155GH, 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 HER155GH part is unused and in its original packaging.
Return procedure for HER155GH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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