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STMicroelectronics STTH506D
- Part No.:
- STTH506D
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-220-2
- Datasheet:
-
STTH506D.pdf
- Description:
- DIODE GEN PURP 600V 5A TO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:906
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Product details
Overview
STTH506D from STMicroelectronics is a 600 V, 5 A ultrafast high-voltage rectifier diode in TO-220AC package, featuring 30 ns reverse recovery time, 1.1 V typical forward voltage at 150 °C, and 3.5 °C/W junction-to-case thermal resistance. It is designed for high-efficiency switching power supplies and industrial AC/DC converters where low conduction and switching losses are critical.
For engineers reviewing the STTH506D datasheet, STTH506D pinout, STTH506D application, or STTH506D equivalent, key selection criteria include reverse recovery time (trr ≤ 30 ns), peak repetitive reverse voltage (VRRM = 600 V), thermal impedance (Rth(j-c) = 3.5 °C/W), and soft recovery behavior for EMI-sensitive SMPS designs.
Technical Context
The STTH506D employs ST's Turbo 2 silicon technology to achieve ultrafast soft recovery with low reverse recovery current (IRM ≤ 5 A) and low Qrr (175 nC), minimizing voltage overshoot and ringing during turn-off in hard-switched topologies. Its 175 °C maximum junction temperature enables operation in thermally constrained industrial environments.
Designed for unidirectional conduction in bridge and single-phase rectification, it supports RMS forward currents up to 20 A (TO-220AC) and withstands non-repetitive surge currents of 70 A (10 ms, sinusoidal). The device exhibits stable VF across temperature (1.10–1.40 V at 150 °C, IF = 5 A) and low IR (≤130 µA at 150 °C, VR = VRRM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 600 V - Withstands peak reverse voltage in high-line AC/DC front-ends without breakdown |
| IF(AV) | 5 A - Sustains average forward current at Tc = 145 °C in continuous conduction mode |
| trr (max) | 30 ns - Enables high-frequency switching (>100 kHz) with minimal switching loss and EMI |
| VF (typ @ 150°C) | 1.10 V - Reduces conduction loss in high-temperature industrial power stages |
| Rth(j-c) | 3.5 °C/W - Allows efficient heat transfer to heatsink; enables compact thermal design |
| Qrr | 175 nC - Low stored charge minimizes turn-off energy dissipation and voltage spikes |
| IRM (max) | 5 A - Limits peak reverse recovery current, easing snubber design and MOSFET stress |
Pinout & Package
STTH506D uses the TO-220AC package: insulated case, single-diode configuration, with anode and cathode leads and metal tab (cathode-connected) for mechanical mounting and thermal conduction. Mounting torque must not exceed 0.7 Nm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry | Connected to AC input or transformer secondary; carries full load current during conduction |
| Cathode (Lead 2) | Forward current exit | Connected to output capacitor or DC bus; also electrically tied to metal tab for heatsinking |
| Metal Tab | Thermal path / Cathode terminal | Provides primary thermal interface to heatsink; must be electrically isolated if cathode is not at chassis ground |
Key Features
| Feature | Design Value |
|---|---|
| Ultrafast soft recovery | trr ≤ 30 ns with low IRM and high softness factor - reduces EMI and voltage overshoot in flyback/LLC converters |
| Low thermal resistance | Rth(j-c) = 3.5 °C/W - enables higher power density by lowering junction temperature rise per watt |
| High-temperature operation | Tj(max) = 175 °C - supports reliable operation in enclosed industrial enclosures without derating |
| ECOPACK®2 compliance | Halogen-free, RoHS-compliant epoxy - meets environmental requirements for industrial and energy infrastructure |
| Low reverse leakage | IR ≤ 130 µA @ 150 °C - maintains efficiency and reliability in high-ambient-temperature UPS and motor drives |
Applications
| Server Power Supply Rectification | Industrial Motor Drive Input Stage |
|---|---|
Use Scenario: High-efficiency 3.3 kW AC/DC front-end in 1U server PSUs operating at 100–240 VAC input. IC Role / Device Role / Timing Role: Primary-side ultrafast rectifier in full-wave bridge configuration, handling 5 A average current at 100 kHz switching frequency. Use Value: 30 ns trr and soft recovery reduce switching losses by ~18% vs. standard fast recovery diodes, lowering heatsink size by 35%. | Use Scenario: Input rectification stage in 7.5 kW variable-frequency drive for HVAC compressors. IC Role / Device Role / Timing Role: Unidirectional conduction element in six-pulse diode bridge, exposed to 150 °C ambient and line transients. Use Value: 175 °C Tj(max) and 600 V VRRM ensure uninterrupted operation under overload and brownout conditions. |
| Solar Microinverter DC Link | Medical Imaging Power Module |
Use Scenario: DC link rectification in 300 W microinverters with MPPT tracking and grid-synchronization. IC Role / Device Role / Timing Role: High-reliability rectifier in dual-stage topology, subjected to rapid dIF/dt transitions during islanding detection. Use Value: 175 nC Qrr and 5 A IRM limit voltage spikes across IGBTs, improving system immunity to false trip events. | Use Scenario: Auxiliary power supply rectification in MRI gradient amplifier modules requiring zero EMI coupling. IC Role / Device Role / Timing Role: Low-noise, soft-recovery rectifier in isolated 24 V standby rail, operating continuously at 65 °C ambient. Use Value: Soft recovery characteristic suppresses high-frequency ringing above 30 MHz, meeting CISPR 11 Class B emissions limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast high-voltage rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH806D | 8 A IF(AV), same VRRM (600 V), trr = 35 ns, Rth(j-c) = 2.5 °C/W | Higher current rating suits 10 A+ designs; larger thermal margin but requires larger PCB footprint | Select when average current exceeds 5 A or junction temperature must stay below 140 °C at 20 A RMS |
| IXYS MUR860E | 8 A IF(AV), 600 V VRRM, trr = 50 ns, VF = 1.75 V @ 25 °C, TO-220AC | Slower recovery and higher VF increase switching/conduction loss; lower cost but reduced efficiency | Acceptable for cost-sensitive 50–75 kHz designs where EMI is less critical and thermal headroom exists |
Compared with STTH806D and MUR860E, the STTH506D offers optimal balance of speed (30 ns trr), thermal performance (3.5 °C/W), and voltage rating for 5 A industrial SMPS-making it preferred where board space, efficiency, and EMI are jointly constrained.
Availability
STTH506D is available at Aetrix Electronics and suitable for server power supplies, industrial motor drives, solar microinverters, and medical imaging power modules requiring stable component supply and long-term industrial lifecycle support.
Supply support for STTH506D 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.
The STTH series belongs to ST's Turbo 2 ultrafast rectifier product line, engineered specifically for high-frequency, high-reliability power conversion in industrial and renewable energy systems.
FAQ
Is STTH506D suitable for use in PFC boost diodes?
Yes. Its 600 V VRRM, 30 ns trr, and soft recovery make it appropriate for continuous-conduction-mode (CCM) PFC boost stages up to 2 kW. Measured Qrr of 175 nC and low IRM minimize voltage stress on the boost switch and reduce EMI generation during turn-off.
What is the recommended heatsink interface for STTH506D in TO-220AC?
A thermally conductive insulating pad (e.g., Bergquist Sil-Pad 2000) or ceramic washer with thermal grease is recommended. Mounting torque must be controlled between 0.55–0.7 Nm to ensure uniform pressure without cracking the package or compromising thermal contact.
Does STTH506D have avalanche capability?
No. STTH506D is not rated for repetitive avalanche operation. It lacks specified EAS (avalanche energy) rating and must be protected against voltage transients exceeding 600 V using clamping circuits or proper layout techniques.
Can STTH506D replace STTH506B in existing DPAK-based designs?
No - STTH506D (TO-220AC) and STTH506B (DPAK) differ in package, thermal performance, and pinout. TO-220AC has higher RMS current rating (20 A vs. 10 A) and lower Rth(j-c) (3.5 vs. 5.0 °C/W), but requires different PCB footprint, mounting hardware, and thermal management.
STTH506D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-2
- Packaging:
- Tube
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 600 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 1.85 V @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 600 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AC
- Operating Temperature - Junction:
- 175°C (Max)
STTH506D FAQ
1.How can I place an order for STTH506D through Aetrix?
Please submit a Request for Quotation (RFQ) for STTH506D 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 STTH506D reliable?
The price and inventory of STTH506D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH506D is usually 5 days.
3.What payment methods are accepted for STTH506D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH506D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STTH506D?
STTH506D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STTH506D 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 STTH506D?
For technical support, including STTH506D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH506D requirements.
6.How does Aetrix verify that STTH506D is sourced from the original manufacturer or authorized distributors?
All STTH506D 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 STTH506D meets industry standards.
7.What is the process for return or replacement of STTH506D?
All STTH506D units undergo pre-shipment inspection (PSI). If there is an issue with STTH506D, 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 STTH506D part is unused and in its original packaging.
Return procedure for STTH506D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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