My Inquiry
My Account
Diodes Incorporated HER604-T
- Part No.:
- HER604-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- R-6, Axial
- Datasheet:
-
HER604-T.pdf
- Description:
- DIODE GEN PURP 300V 6A R-6
- Quantity:
- Payment:
- Shipping:
Inventory:7,111
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
HER604-T from Diodes Incorporated is a 6.0A, 300V high-efficiency axial-lead rectifier diode optimized for AC/DC power supplies and switching converters. It delivers low forward voltage (1.2V @ 6.0A), ultra-fast reverse recovery (60ns), and high surge capability (250A @ 8.3ms), enabling compact, thermally efficient designs in offline SMPS and industrial power adapters.
For engineers reviewing the HER604-T datasheet, HER604-T pinout, HER604-T application, or HER604-T equivalent, key selection criteria include peak repetitive reverse voltage (300V), average forward current (6.0A), reverse recovery time (60ns), thermal derating behavior, and axial-lead mechanical compatibility with through-hole PCB layouts.
Technical Context
This device operates as a single-phase, half-wave silicon rectifier with unidirectional conduction. Its 60ns reverse recovery time supports operation up to ~100kHz in discontinuous-conduction-mode flyback converters, while the 250A non-repetitive surge rating accommodates inrush currents in capacitor-input filter stages.
The 1.2V forward voltage at 6.0A DC reduces conduction losses by >15% versus standard 6A rectifiers (e.g., 1N5408), and the 10µA max reverse leakage at 25°C ensures stable blocking in high-impedance bias networks across -65°C to +150°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 300 V - Maximum repetitive peak reverse voltage; defines safe AC input voltage handling (e.g., 210V RMS line) before breakdown |
| I(AV) | 6.0 A - Average forward rectified current at 55°C case temperature; sets continuous power delivery limit in heat-sinked designs |
| VF | 1.2 V @ 6.0A - Forward voltage drop; determines conduction loss (7.2W dissipation at full load) and thermal design margin |
| TRR | 60 ns - Reverse recovery time; enables use in 50–100 kHz SMPS without excessive switching loss or EMI |
| IFSM | 250 A @ 8.3ms - Non-repetitive surge current; withstands cold-start inrush into bulk capacitors without failure |
| IR | 10 µA @ 25°C - Max reverse leakage; ensures minimal standby power loss in high-voltage hold-up circuits |
Pinout & Package
HER604-T uses an axial-leaded R-6 package (9.5mm lead length, 8.6–9.1mm body width, 25.4mm overall length) with cathode indicated by color band. Leads are solderable per MIL-STD-202, Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Input terminal for positive half-cycle conduction | Connects to AC source or transformer secondary; must handle full surge current path |
| Cathode (banded end) | Output terminal for rectified DC | Connects to bulk capacitor or output filter; polarity marking prevents reverse-bias installation error |
Key Features
| Feature | Design Value |
|---|---|
| High surge current capability | 250A single half-sine (8.3ms); sustains repeated cold starts in 100–240VAC universal-input power supplies |
| Low forward voltage drop | 1.2V @ 6.0A; reduces conduction loss by ≥1.5W vs. legacy 6A rectifiers, easing thermal management |
| Ultra-fast recovery | 60ns trr; minimizes reverse recovery charge (Qrr ≈ 25nC), lowering EMI and switching loss in high-frequency converters |
| UL 94V-0 flammability rating | Molded plastic case meets safety standard for enclosed power supply enclosures without additional flame barriers |
Applications
| AC/DC Adapter Power Supply | Industrial Motor Drive Control Board |
|---|---|
Use Scenario: 100–240VAC input stage of 48W wall adapter with capacitor-input filter. IC Role / Device Role / Timing Role: Primary-side rectifier converting AC line to pulsating DC before bulk capacitor smoothing. Use Value: 300V VRRM safely handles 240VAC peaks (339V), while 6.0A I(AV) supports sustained 48W output with <10°C rise on 25mm² copper pour. | Use Scenario: Auxiliary power supply for gate drivers and logic in 3-phase inverter control PCB. IC Role / Device Role / Timing Role: Rectifying 24VAC control transformer output to generate isolated 24VDC rail. Use Value: 60ns TRR eliminates cross-conduction risk during fast-switching gate driver sequencing; 10µA IR prevents false triggering in high-impedance enable circuits. |
| LED Streetlight Driver | Medical Diagnostic Power Module |
Use Scenario: Input rectification in constant-current LED driver with PFC front-end. IC Role / Device Role / Timing Role: Secondary-side rectifier in boost-derived PFC stage feeding buck-boost LED current regulator. Use Value: Low VF (1.2V) improves system efficiency by 0.8% at full load; UL 94V-0 housing satisfies Class II insulation requirements. | Use Scenario: Isolated auxiliary supply for microcontroller and sensor interface in portable ultrasound unit. IC Role / Device Role / Timing Role: Bridge rectifier leg (used as single diode) in dual-output 5V/12V isolated flyback transformer secondary. Use Value: -65°C to +150°C operating range ensures reliability during sterilization cycles and battery-powered field operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-efficiency rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH6R06D | TO-220AC package, 6A/600V, 50ns TRR, higher VF (1.7V @ 6A) | Requires heatsink for same power level; better for higher-voltage (>400V) systems | Choose when higher VRRM or surface-mount assembly is required; avoid if axial-lead layout or low VF is critical |
| ES6D-E3/54 | SMA package, 6A/200V, 35ns TRR, VF = 1.15V @ 6A | Lower voltage rating limits to 120VAC-only designs; SMT footprint saves board space | Prefer for compact, low-profile designs with ≤200V input; not suitable for universal 240VAC mains |
Compared with STTH6R06D and ES6D-E3/54, HER604-T uniquely balances 300V rating, axial-lead mechanical fit, 1.2V VF, and 60ns TRR-making it optimal for cost-sensitive, through-hole, universal-input power supplies where thermal mass and layout simplicity outweigh SMT density or extreme voltage margin.
Availability
HER604-T is available at Aetrix Electronics and suitable for AC/DC adapters, industrial motor control boards, LED streetlight drivers, and medical diagnostic power modules requiring stable component supply and long-term manufacturability.
Supply support for HER604-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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity.
HER604-T belongs to the High Efficiency Rectifier (HER) product line, engineered for high-frequency switching power supplies where low forward voltage, fast recovery, and robust surge tolerance are essential.
FAQ
What is the maximum allowable case temperature for continuous operation?
The HER604-T is rated for continuous operation at 55°C case temperature (TC) delivering its full 6.0A average forward current. Derating begins above this point: at 75°C TC, maximum I(AV) drops to 4.5A per Figure 1. Thermal design must ensure TC stays ≤55°C under worst-case ambient and airflow conditions.
Can HER604-T be used in full-wave bridge configurations?
Yes-HER604-T is commonly used as one leg in discrete full-wave bridge rectifiers. Its 300V VRRM and 250A IFSM make it suitable for 240VAC inputs. When used in bridge topology, ensure all four diodes share identical specs and thermal mounting to prevent current imbalance and premature failure.
How does the 60ns reverse recovery time impact EMI performance?
A 60ns TRR limits reverse recovery charge (Qrr) to approximately 25nC, reducing high-frequency ringing and conducted EMI during turn-off. This allows simpler EMI filter designs in Class B consumer power supplies and avoids the need for snubbers in most 50–100kHz flyback topologies.
Is HER604-T RoHS compliant and halogen-free?
Yes-HER604-T meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. The molded plastic case contains no brominated flame retardants, and lead finish complies with exemption 7a for high-melting-temperature soldering alloys.
HER604-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- R-6, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 300 V
- Current - Average Rectified (Io):
- 6A
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 6 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 60 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 300 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- R-6
- Operating Temperature - Junction:
- -65°C ~ 150°C
HER604-T FAQ
1.How can I place an order for HER604-T through Aetrix?
Please submit a Request for Quotation (RFQ) for HER604-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 HER604-T reliable?
The price and inventory of HER604-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HER604-T is usually 5 days.
3.What payment methods are accepted for HER604-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HER604-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HER604-T?
HER604-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HER604-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 HER604-T?
For technical support, including HER604-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HER604-T requirements.
6.How does Aetrix verify that HER604-T is sourced from the original manufacturer or authorized distributors?
All HER604-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 HER604-T meets industry standards.
7.What is the process for return or replacement of HER604-T?
All HER604-T units undergo pre-shipment inspection (PSI). If there is an issue with HER604-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 HER604-T part is unused and in its original packaging.
Return procedure for HER604-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HER604-T Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
