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STMicroelectronics STTH20R04D
- Part No.:
- STTH20R04D
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-220-2
- Datasheet:
-
STTH20R04D.pdf
- Description:
- DIODE GEN PURP 400V 20A TO220AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,259
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Product details
Overview
STTH20R04 from STMicroelectronics is an ultrafast recovery power rectifier optimized for clamping in plasma display panel (PDP) energy recovery circuits, featuring 400 V repetitive peak reverse voltage, 20 A average forward current, 18 ns typical reverse recovery time, 1.15 V typical forward voltage at 125 °C, and TO-220AC package with insulated case.
For engineers reviewing the STTH20R04 datasheet, STTH20R04 pinout, STTH20R04 application, or STTH20R04 equivalent, key selection criteria include ultrafast trr performance under high dIF/dt, low conduction loss at elevated junction temperature, insulating package rating (2000 VRMS), and thermal resistance suitability for forced-air or heatsink-cooled PDP power stages.
Technical Context
This device employs a planar epitaxial silicon structure engineered to balance low VF and fast trr-critical for minimizing switching losses during high-frequency clamping in PDP sustain circuits. Its softness factor (S ≥ 0.3) reduces EMI by limiting di/dt-induced voltage overshoot during reverse recovery.
Designed specifically for energy recovery blocks, it operates reliably up to 175 °C junction temperature and sustains 150 A non-repetitive surge current (10 ms sine), enabling robust handling of transient energy spikes without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Withstands repetitive reverse voltage in PDP clamp node without breakdown |
| IF(AV) | 20 A - Sustains continuous forward current in energy recovery loop under DC-biased operation |
| trr (typ.) | 18 ns - Enables efficient high-frequency (>100 kHz) switching with minimal reverse recovery loss |
| VF (typ., 125 °C) | 1.15 V - Low conduction drop maintains efficiency at elevated operating temperature |
| Tj (max.) | 175 °C - Supports compact thermal design in space-constrained PDP power modules |
| Rth(j-c) | 2.8 °C/W - Enables effective heat transfer to heatsink in TO-220AC mounting configuration |
| IRM (typ.) | 8 A - Limits peak reverse recovery current to reduce stress on driving MOSFETs |
Pinout & Package
TO-220AC package: insulated plastic case with metal tab (cathode-connected), three leads (anode, cathode, case), UL94 V0 epoxy, 0.55 N·m recommended mounting torque.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input current entry point | Connected to energy storage capacitor or inductor node in clamp circuit |
| Cathode (Lead 2) | Output current exit point | Directly tied to high-side switch drain or bus return path |
| Case (Tab) | Thermal & electrical connection | Electrically connected to cathode; provides primary thermal path to heatsink |
Key Features
| Feature | Design Value |
|---|---|
| Ultrafast recovery | 18 ns trr enables >100 kHz operation with <1.5% recovery loss in PDP sustain stage |
| Low leakage current | 20 µA @ 25 °C ensures minimal standby power loss in high-impedance clamp nodes |
| High surge capability | 150 A IFSM supports repeated energy dump transients without bond-wire failure |
| Insulated package | 2000 VRMS isolation allows direct mounting on grounded heatsinks without additional insulation |
| ECOPACK®2 compliance | Meets RoHS and halogen-free requirements for consumer electronics manufacturing |
Applications
| Plasma Display Panel (PDP) Energy Recovery | Industrial DC-DC Clamp Circuits |
|---|---|
|
Use Scenario: Recovers inductive energy from sustain electrode drivers during flyback phase in 42–60 inch PDP TVs. IC Role / Device Role / Timing Role: Ultrafast clamping diode in resonant energy recovery block, synchronized to 100–200 kHz sustain pulses. Use Value: Reduces power loss by 35% vs. standard fast recovery diodes due to 18 ns trr and soft recovery. |
Use Scenario: Clamps voltage spikes across high-current IGBTs in industrial motor drive snubber networks. IC Role / Device Role / Timing Role: Fast-recovery freewheeling diode absorbing turn-off energy from 10–50 A inductive loads. Use Value: Prevents IGBT overvoltage failure with 8 A IRM and 0.3+ softness factor under −200 A/µs dIF/dt. |
| High-Efficiency LED Driver Flyback | Telecom Power Supply OR-ing |
|
Use Scenario: Secondary-side rectifier in isolated flyback converters powering high-brightness LED arrays. IC Role / Device Role / Timing Role: Output rectifier delivering 20 A DC with minimal conduction loss at 125 °C ambient. Use Value: Maintains 92% system efficiency via 1.15 V VF at full load and 175 °C Tj rating. |
Use Scenario: OR-ing diode in redundant 48 V telecom rectifier modules to prevent backfeed and enable hot-swap. IC Role / Device Role / Timing Role: High-current, low-VF blocking diode isolating parallel power inputs. Use Value: Delivers 20 A continuous current with <0.5 W conduction loss per diode at 25 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH20L06D | 600 V VRRM, 25 ns trr (typ.), 1.25 V VF @ 125 °C | Higher voltage margin but slower recovery; suited for 400–600 V bus systems with lower dIF/dt | Select when reverse voltage exceeds 400 V but ultrafast trr is secondary to voltage safety margin |
| IXYS MUR2040CT | Dual common-cathode TO-220AB, 400 V, 35 ns trr, 1.2 V VF | Non-insulated package requires isolation washer; higher trr increases switching loss in PDP | Use only where dual-diode topology is required and 2000 VRMS isolation is not mandatory |
Compared with STTH20R04, STTH20L06D trades speed for voltage headroom, while MUR2040CT sacrifices insulation and recovery speed for dual-diode integration-neither matches STTH20R04's combination of 400 V rating, 18 ns trr, and 2000 VRMS isolation in a single-anode/cathode TO-220AC package.
Availability
STTH20R04 is available at Aetrix Electronics and suitable for plasma display panel energy recovery, industrial DC-DC clamp circuits, and high-efficiency LED driver flyback applications requiring stable component supply and long-term production continuity.
Supply support for STTH20R04 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, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.
STTH20R04 belongs to ST's high-voltage ultrafast rectifier product line, developed specifically to address energy recovery efficiency and reliability challenges in plasma display and high-frequency power conversion systems.
FAQ
What is the maximum allowable junction temperature for continuous operation?
The STTH20R04 has a maximum operating junction temperature of 175 °C, verified per absolute ratings table (Table 2). This rating applies under conditions where thermal resistance from junction to case (Rth(j-c) = 2.8 °C/W) and case-to-ambient are maintained within limits, and peak transient currents do not exceed IFSM.
Is the TO-220AC package electrically insulated?
Yes-the TO-220AC variant of STTH20R04 features an insulated plastic case rated for 2000 VRMS (sine wave) isolation between the metal tab (cathode) and external mounting surface. This eliminates need for insulating pads when mounted directly to grounded heatsinks.
How does the softness factor affect circuit performance?
The STTH20R04 exhibits a softness factor ≥ 0.3, meaning reverse recovery current decays gradually rather than abruptly. This reduces voltage overshoot and EMI generation during turn-off, especially critical in high-dIF/dt PDP clamp circuits where abrupt recovery could trigger false triggering in adjacent logic.
Can STTH20R04 replace STTH20R04FP in the same PCB footprint?
No-STTH20R04 uses TO-220AC (standard through-hole), while STTH20R04FP uses TO-220FPAC (full-pack insulated variant with different lead spacing and tab geometry). Their mechanical outlines differ significantly (see Figures 16 and 17); direct substitution requires board redesign and thermal validation.
STTH20R04D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-2
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 1.7 V @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 45 ns
- Current - Reverse Leakage @ Vr:
- 20 µA @ 400 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AC
- Operating Temperature - Junction:
- 175°C (Max)
STTH20R04D FAQ
1.How can I place an order for STTH20R04D through Aetrix?
Please submit a Request for Quotation (RFQ) for STTH20R04D 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 STTH20R04D reliable?
The price and inventory of STTH20R04D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH20R04D is usually 5 days.
3.What payment methods are accepted for STTH20R04D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH20R04D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STTH20R04D?
STTH20R04D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STTH20R04D 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 STTH20R04D?
For technical support, including STTH20R04D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH20R04D requirements.
6.How does Aetrix verify that STTH20R04D is sourced from the original manufacturer or authorized distributors?
All STTH20R04D 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 STTH20R04D meets industry standards.
7.What is the process for return or replacement of STTH20R04D?
All STTH20R04D units undergo pre-shipment inspection (PSI). If there is an issue with STTH20R04D, 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 STTH20R04D part is unused and in its original packaging.
Return procedure for STTH20R04D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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