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STMicroelectronics STTH102RL
- Part No.:
- STTH102RL
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
STTH102RL.pdf
- Description:
- DIODE GEN PURP 200V 1A DO41
- Quantity:
- Payment:
- Shipping:
Inventory:12,721
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Product details
Overview
STTH102RL from STMicroelectronics is a 200 V, 1 A ultrafast recovery rectifier diode in DO-41 package, engineered for low-loss switching in power conversion circuits. It delivers 0.68 V typical forward voltage at 1 A and 12 ns typical reverse recovery time, with 175 °C maximum junction temperature - enabling use as a flyback or freewheeling diode in compact auxiliary power supplies.
For engineers reviewing the STTH102RL datasheet, STTH102RL pinout, STTH102RL application, or STTH102RL equivalent, key selection criteria include its ultrafast trr (12 ns typ.), low VF (0.68 V @ 125 °C), high Tj rating (175 °C), ECOPACK®2 compliance, and DO-41 thermal performance (Rth(j-l) = 50 °C/W).
Technical Context
The STTH102RL employs ST's planar platinum-doped silicon technology to achieve ultrafast soft recovery with negligible switching losses. Its dynamic behavior is characterized by low Qrr and controlled dV/dt immunity, making it suitable for high-frequency hard-switched topologies like flyback and active clamp forward converters.
Static conduction is optimized via low series resistance and minimal carrier lifetime control, yielding 0.68 V VF at 1 A and 125 °C. Thermal design is supported by validated Rth(j-l) = 50 °C/W (DO-41, 10 mm lead length) and operation up to 175 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - supports input rectification or clamping in 115/230 VAC-derived auxiliary rails |
| IF(AV) | 1 A at TL = 130 °C - enables continuous conduction in low-power SMPS outputs |
| VF(typ.) | 0.68 V @ IF = 1 A, Tj = 125 °C - reduces conduction loss to ~0.68 W at rated DC current |
| trr(typ.) | 12 ns - minimizes switching loss and EMI in 100–500 kHz power stages |
| Tj(max.) | 175 °C - allows operation in thermally constrained enclosures without derating |
| Rth(j-l) | 50 °C/W (DO-41, 10 mm leads) - defines thermal path for PCB trace heatsinking |
| ECOPACK®2 | Compliant - meets RoHS, halogen-free, and material declaration requirements for industrial end equipment |
Pinout & Package
STTH102RL is housed in a DO-41 axial-leaded plastic package with cathode band marking. The device has two terminals: anode and cathode, with polarity indicated by a single painted band on the cathode end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to switch node or transformer secondary in flyback/freewheeling configurations |
| Cathode | Forward current exit / reverse blocking terminal | Marked with band; ties to output rail or ground return path; withstands 200 V reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| Ultrafast recovery | trr = 12 ns typ. - enables efficient operation above 200 kHz without snubber networks |
| Low forward voltage | VF = 0.68 V @ 1 A, 125 °C - cuts conduction loss by ~25% vs. standard fast diodes |
| High-temperature capability | Tj(max.) = 175 °C - eliminates need for oversized heatsinks in sealed power modules |
| Soft recovery characteristic | Controlled reverse recovery waveform - reduces EMI generation and voltage overshoot across MOSFETs |
| ECOPACK®2 compliance | Halogen-free, RoHS-compliant materials - satisfies environmental mandates for industrial and lighting products |
Applications
| LED Driver Auxiliary Supply | Flyback Converter Output Rectifier |
|---|---|
Use Scenario: Isolated 12 V/0.5 A auxiliary supply powering LED driver ICs and feedback circuitry. IC Role / Device Role / Timing Role: Freewheeling diode conducting during MOSFET off-time in discontinuous conduction mode (DCM) flyback. Use Value: 12 ns trr prevents cross-conduction loss and maintains >85% efficiency at 250 kHz switching frequency. | Use Scenario: Secondary-side rectification in 5–24 V, 1–3 W offline flyback converters for smart lighting controls. IC Role / Device Role / Timing Role: Output rectifier handling pulsed DC current with peak IF of 1.8 A and 500 ns turn-off transitions. Use Value: 0.68 V VF at 125 °C reduces average dissipation to ≤0.7 W, allowing DO-41 mounting without heatsink. |
| Industrial Sensor Power Rail | Relay Coil Suppression |
Use Scenario: 5 V/1 A isolated supply for analog sensor signal conditioning in PLC I/O modules. IC Role / Device Role / Timing Role: Input rectifier feeding linear regulator or buck converter; operates continuously at 1 A average current. Use Value: 175 °C Tj rating ensures reliability under 70 °C ambient + self-heating in confined DIN-rail enclosures. | Use Scenario: Snubberless suppression of back-EMF from 24 VDC relay coils (100–500 mW) in automation controllers. IC Role / Device Role / Timing Role: Freewheeling diode clamping inductive kick during coil de-energization. Use Value: Soft recovery limits voltage overshoot to <300 V, protecting 30 V-rated control MOSFETs without TVS. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1L06RL | 600 V VRRM, same DO-41 package, trr = 25 ns, VF = 1.15 V @ 1 A | Higher voltage rating but higher VF and slower recovery - suited for 400 V bus systems, not optimal for 200 V designs | Select only if system requires >300 V reverse blocking; avoid for efficiency-critical 200 V applications |
| ES1J-E3/54 | 600 V VRRM, SMA package, trr = 35 ns, VF = 1.7 V @ 1 A, Rth(j-l) = 30 °C/W | Higher VF increases conduction loss; faster thermal response but slower recovery - better for thermal-limited, lower-frequency use | Prefer when board space is constrained (SMA) and switching frequency <100 kHz; not recommended for high-efficiency 200 V flyback |
Compared with STTH1L06RL and ES1J-E3/54, STTH102RL offers the lowest VF and fastest trr within the 200 V class, delivering superior efficiency in compact, high-frequency auxiliary supplies where thermal and EMI margins are tight.
Availability
STTH102RL is available at Aetrix Electronics and suitable for LED lighting auxiliary supplies, industrial sensor power rails, relay coil suppression circuits, and flyback converter output rectification requiring stable component supply and long-term manufacturability.
Supply support for STTH102RL 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 sensing solutions for industrial, automotive, and consumer markets.
The STTH ultrafast diode product line targets high-efficiency, high-frequency power conversion - specifically engineered for reduced switching loss and thermal robustness in compact offline and DC-DC converters.
FAQ
What is the maximum allowable peak forward surge current for STTH102RL?
The STTH102RL supports 50 A non-repetitive forward surge current (IFSM) for 10 ms sinusoidal pulses in DO-41 package. This rating applies at Tj = 25 °C and validates its use in transient overload conditions such as cold-start inrush or relay coil discharge events.
Does STTH102RL have a specified reverse recovery charge (Qrr)?
Yes - Qrr is 12 nC typical at IF = 0.5 A, Irr = 0.25 A, and VR = 100 V (Tj = 25 °C). This value directly impacts switching loss in hard-switched topologies and is used with dI/dt to calculate turn-off energy in MOSFET gate drive and flyback designs.
Can STTH102RL be used in surface-mount designs?
No - STTH102RL is exclusively offered in DO-41 axial-leaded through-hole package. For SMD alternatives, consider STTH102A (SMA package), which shares identical electrical specs but uses surface-mount footprint and has Rth(j-l) = 30 °C/W.
Is STTH102RL suitable for use with 230 VAC input rectification?
No - with 200 V VRRM, STTH102RL is unsuitable for direct 230 VAC bridge rectification (which yields ~325 V peak). It is designed for secondary-side or auxiliary rail applications where reverse voltage remains below 200 V, such as post-regulation or low-voltage flyback outputs.
STTH102RL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 970 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 20 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 200 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
- Operating Temperature - Junction:
- 175°C (Max)
STTH102RL FAQ
1.How can I place an order for STTH102RL through Aetrix?
Please submit a Request for Quotation (RFQ) for STTH102RL 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 STTH102RL reliable?
The price and inventory of STTH102RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH102RL is usually 5 days.
3.What payment methods are accepted for STTH102RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH102RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STTH102RL?
STTH102RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STTH102RL 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 STTH102RL?
For technical support, including STTH102RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH102RL requirements.
6.How does Aetrix verify that STTH102RL is sourced from the original manufacturer or authorized distributors?
All STTH102RL 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 STTH102RL meets industry standards.
7.What is the process for return or replacement of STTH102RL?
All STTH102RL units undergo pre-shipment inspection (PSI). If there is an issue with STTH102RL, 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 STTH102RL part is unused and in its original packaging.
Return procedure for STTH102RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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