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STMicroelectronics STTH110RL
- Part No.:
- STTH110RL
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
STTH110RL.pdf
- Description:
- DIODE GEN PURP 1KV 1A DO41
- Quantity:
- Payment:
- Shipping:
Inventory:4,220
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Product details
Overview
STTH110RL from STMicroelectronics is an ultrafast recovery rectifier diode in DO-41 package, rated for 1000 V repetitive peak reverse voltage and 1 A average forward current, with typical forward voltage drop of 1.42 V at 150 °C and reverse recovery time of 75 ns. It serves as a freewheeling, clamping, or snubber diode in offline AC-DC power supplies and DC-DC converters.
For engineers reviewing the STTH110RL datasheet, STTH110RL pinout, STTH110RL application, or STTH110RL equivalent, key selection criteria include reverse recovery time (75 ns), soft switching behavior, thermal resistance (45 °C/W junction-to-lead), and ECOPACK2 compliance for industrial power conversion designs.
Technical Context
This diode employs ST's planar ultrafast high-voltage technology to achieve soft reverse recovery with low EMI generation and reduced switching losses. Its 75 ns trr and 300 ns tfr are measured under standardized conditions (IF = 0.5 A, Irr = 0.25 A, IR = 1 A), enabling efficient operation in 50–100 kHz SMPS topologies.
The device supports high surge capability (20 A IFSM, 8.3 ms sine half-cycle) and operates up to 175 °C junction temperature. Thermal design is enabled by documented Rth(j-l) = 45 °C/W (DO-41) and Rth(j-a) = 110 °C/W, with copper area dependency quantified in Figures 5–6.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - Withstands full bridge rectification from 700 V RMS input without breakdown |
| IF(AV) | 1 A at TL = 100 °C - Sustains continuous conduction in auxiliary or bias windings |
| trr | 75 ns - Enables clean turn-off in flyback snubbers and reduces switching node ringing |
| VF(typ.) | 1.42 V at IF = 1 A, Tj = 150 °C - Low conduction loss in thermally constrained PCB layouts |
| Rth(j-l) | 45 °C/W - Junction-to-lead thermal resistance enables direct heatsinking via PCB copper pour |
| IR(max) | 50 µA at Tj = 125 °C, VR = 1000 V - Ensures minimal leakage in high-impedance clamp circuits |
Pinout & Package
STTH110RL is housed in DO-41 axial lead package with cathode band marking. Leads are tinned copper, UL94 V0 compliant epoxy body, and designed for through-hole mounting with 10 mm lead length standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to switched node (e.g., MOSFET drain) in freewheeling path |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; tied to output rail or ground return in clamp/snubber networks |
Key Features
| Feature | Design Value |
|---|---|
| Soft switching recovery | Minimizes voltage overshoot and EMI during turn-off, reducing need for RC snubbers |
| Planar junction technology | Ensures consistent trr distribution and stable performance across temperature and lifetime |
| ECOPACK2 compliance | Meets RoHS and halogen-free requirements without compromising thermal or electrical specs |
| High IFSM rating | 20 A non-repetitive surge withstand enables robust startup and fault tolerance in unregulated supplies |
Applications
| AC-DC Adapter Auxiliary Supply | Flyback Converter Snubber |
|---|---|
Use Scenario: Provides isolated bias voltage for PWM controller ICs in universal-input wall adapters. IC Role / Device Role / Timing Role: Freewheeling diode on transformer auxiliary winding, conducting only during MOSFET off-time. Use Value: 1.42 V VF at 150 °C ensures stable 12–15 V bias under full-load thermal stress. | Use Scenario: Absorbs leakage inductance energy in discontinuous-conduction-mode flyback converters. IC Role / Device Role / Timing Role: Clamp diode in RCD snubber network, activated during MOSFET turn-off edge. Use Value: 75 ns trr and soft recovery suppress voltage spikes above 1000 V without oscillation. |
| Industrial DC-DC Isolated Bias Rail | EMI-Sensitive Power Factor Correction Stage |
Use Scenario: Generates gate drive or sensing supply in motor drive auxiliary power modules. IC Role / Device Role / Timing Role: Output rectifier on isolated auxiliary winding feeding LDO or linear regulator. Use Value: 175 °C max junction temperature allows operation in sealed enclosures with limited airflow. | Use Scenario: Clamps switching node in boost PFC pre-regulators used in medical or test equipment. IC Role / Device Role / Timing Role: Fast-recovery clamp diode placed across boost diode to limit dv/dt-induced noise. Use Value: Soft recovery characteristic reduces broadband EMI below CISPR-32 Class B limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06 | Same DO-41 package, lower VRRM (600 V), higher VF (1.55 V typ. at 150 °C) | Suitable only for ≤400 V AC input systems; less margin for transient overvoltage | Select when cost sensitivity outweighs 1000 V safety margin and thermal derating is acceptable |
| UF4007 | Standard ultrafast diode, 1000 V VRRM, but trr = 75 ns (same), VF = 1.7 V typ. at 25 °C, no soft recovery spec | Lacks documented soft recovery; may require larger snubber in EMI-critical designs | Acceptable for non-sensitive consumer-grade supplies where layout controls EMI |
Compared with STTH110RL, STTH1R06 trades voltage headroom for cost, while UF4007 matches voltage and speed but lacks soft recovery assurance-critical for low-EMI industrial power stages.
Availability
STTH110RL is available at Aetrix Electronics and suitable for AC-DC adapters, industrial auxiliary power supplies, and EMI-sensitive PFC stages requiring stable component supply and long-term manufacturability.
Supply support for STTH110RL 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, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.
STTH110RL belongs to ST's ultrafast high-voltage rectifier product line, engineered specifically for low-loss, low-EMI power conversion in compact offline switchers and auxiliary supplies.
FAQ
What is the maximum allowable junction temperature for STTH110RL?
The absolute maximum junction temperature is +175 °C, validated per Table 1 in DS3067 Rev 4. Operation at this limit requires thermal design ensuring Rth(j-a) ≤ 110 °C/W under worst-case ambient and airflow conditions, with derated IF(AV) per Figure 1.
Does STTH110RL have a specified soft recovery characteristic?
Yes-the datasheet explicitly states "Soft switching for reduced EMI disturbances" in the Features section and confirms soft recovery behavior via trr measurement methodology (IF = 0.5 A, Irr = 0.25 A, IR = 1 A) and absence of hard reverse recovery spikes in application notes AN5088 and AN4021.
Can STTH110RL be used in surface-mount designs?
No-STTH110RL is packaged exclusively in DO-41 axial lead format. For SMD alternatives, ST offers STTH110A in SMA package (same electrical specs, different footprint); STTH110RL itself is not SMD-compatible.
How does the 45 °C/W Rth(j-l) value impact PCB layout?
This value assumes 10 mm lead length and defines thermal path from junction to solder joint. To realize it, PCB traces must provide ≥1 cm² copper area per lead with 35 µm thickness (per Figure 5), and avoid thermal isolation cuts near mounting pads.
STTH110RL 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):
- 1000 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.7 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 75 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1000 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
- Operating Temperature - Junction:
- 175°C (Max)
STTH110RL FAQ
1.How can I place an order for STTH110RL through Aetrix?
Please submit a Request for Quotation (RFQ) for STTH110RL 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 STTH110RL reliable?
The price and inventory of STTH110RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH110RL is usually 5 days.
3.What payment methods are accepted for STTH110RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH110RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STTH110RL?
STTH110RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STTH110RL 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 STTH110RL?
For technical support, including STTH110RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH110RL requirements.
6.How does Aetrix verify that STTH110RL is sourced from the original manufacturer or authorized distributors?
All STTH110RL 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 STTH110RL meets industry standards.
7.What is the process for return or replacement of STTH110RL?
All STTH110RL units undergo pre-shipment inspection (PSI). If there is an issue with STTH110RL, 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 STTH110RL part is unused and in its original packaging.
Return procedure for STTH110RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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