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STMicroelectronics STTH302RL
- Part No.:
- STTH302RL
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
STTH302RL.pdf
- Description:
- DIODE GEN PURP 200V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:1,370
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Product details
Overview
STTH302RL from STMicroelectronics is a 200 V, 3 A ultrafast recovery rectifier diode in DO-201AD package, featuring 35 ns reverse recovery time (trr), 0.75 V max forward voltage at 125°C, and 175°C maximum junction temperature. It serves as a freewheeling or snubber diode in high-frequency switch-mode power supplies and transistor base-drive circuits.
For engineers reviewing the STTH302RL datasheet, STTH302RL pinout, STTH302RL application, or STTH302RL equivalent, key selection criteria include trr ≤ 35 ns at IF = 1 A, VF ≤ 0.75 V at TJ = 125°C, IR ≤ 75 µA at TJ = 125°C, thermal resistance Rth(j-a) = 25 °C/W on infinite heatsink, and DO-201AD mechanical compatibility with axial leaded PCB layouts.
Technical Context
This planar silicon diode uses ST's 200 V ultrafast technology optimized for minimal conduction and switching losses. Its low Qrr and fast tfr (70 ns) enable efficient operation in hard-switched topologies above 100 kHz.
The device exhibits stable dynamic performance across temperature: trr increases only ~1.3× from 25°C to 125°C under identical test conditions (IF = 3 A, dIF/dt = 200 A/µs, VR = 100 V), and VF drops from 0.95 V to 0.66 V (typ.) over the same range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Withstands repetitive reverse voltage up to 200 V without breakdown, suitable for 115/230 VAC input rectification with margin. |
| IF(AV) | 3 A at TI = 107°C, δ = 0.5 - Continuous average forward current rating under standard duty-cycle thermal conditions. |
| trr | 35 ns max at IF = 1 A, dIF/dt = −50 A/µs, VR = 30 V, TJ = 25°C - Enables high-frequency switching with low commutation loss in SMPS. |
| VF | 0.75 V max at IF = 3 A, TJ = 125°C - Low conduction loss reduces heat generation in compact power stages. |
| Tj(max) | 175°C - Allows operation in thermally constrained environments such as enclosed industrial PSUs or motor drives. |
| Rth(j-a) | 25 °C/W on infinite heatsink with 10 mm leads - Defines thermal path limitation for natural-convection cooling design. |
| IR | 75 µA max at VR = VRRM, TJ = 125°C - Low leakage preserves efficiency in standby and light-load modes. |
Pinout & Package
DO-201AD axial-leaded package with cathode indicated by white band. Body diameter ∅C = 5.30 mm, lead diameter ∅D = 1.30 mm, overall length B = 25.40 mm, and body length A = 9.50 mm. Minimum right-angle bend zone length is 15 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead without band) | Forward current entry point | Connected to switch node (e.g., MOSFET drain) in freewheeling configuration. |
| Cathode (lead with white band) | Forward current exit / reverse blocking terminal | Connected to output rail or ground return; withstands full VRRM during off-state. |
Key Features
| Feature | Design Value |
|---|---|
| Ultrafast recovery | trr ≤ 35 ns ensures minimal turn-off loss in 100–500 kHz SMPS designs. |
| High-temperature capability | Tj(max) = 175°C supports operation in sealed enclosures or near heat-generating components. |
| Low forward voltage | VF ≤ 0.75 V at 3 A and 125°C directly reduces I²R conduction loss and thermal stress. |
| Low leakage current | IR ≤ 75 µA at 125°C maintains efficiency in standby and low-power modes. |
| Robust surge rating | IFSM = 130 A (10 ms, sinusoidal) handles inrush and transient overload without failure. |
Applications
| Switch-Mode Power Supply Output Rectification | Transistor Base-Drive Clamping |
|---|---|
Use Scenario: Secondary-side rectification in 65–300 W AC/DC adapters and open-frame PSUs operating at 100–300 kHz. IC Role / Device Role / Timing Role: Freewheeling diode providing low-loss current path during MOSFET off-time; replaces slower FR-type diodes to reduce EMI and improve efficiency. Use Value: 35 ns trr cuts reverse recovery charge (Qrr) by >60% vs. standard fast recovery diodes, lowering switching loss and snubber stress. | Use Scenario: Clamp protection for bipolar transistor or IGBT gate/base drive circuits subject to inductive kickback. IC Role / Device Role / Timing Role: Snubber diode absorbing negative voltage spikes during turn-off; leverages fast tfr (70 ns) and low VFP (1.6 V) to limit overshoot. Use Value: 1.6 V forward recovery voltage limits peak clamping voltage, protecting driver ICs without requiring external Zener clamps. |
| DC-DC Converter Freewheeling | Inductive Load Flyback Suppression |
Use Scenario: Synchronous or non-synchronous buck converter outputs in telecom and industrial DC distribution systems (12–48 V bus). IC Role / Device Role / Timing Role: Freewheeling path during high-side switch off-phase; operates with δ = 0.5 duty cycle and ambient up to 85°C. Use Value: Rth(j-a) = 25 °C/W enables 3 A continuous conduction without forced air, reducing heatsink area by ~40% vs. TO-220 alternatives. | Use Scenario: Solenoid, relay, and stepper motor coil suppression in programmable logic controllers and motion control modules. IC Role / Device Role / Timing Role: Passive flyback diode routing inductive energy back to supply rail; must handle 130 A surge peaks during sudden de-energization. Use Value: 130 A non-repetitive surge rating prevents single-event failure during frequent actuation cycles in factory automation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L02RL | Same DO-201AD package; lower IF(AV) = 2 A, trr = 30 ns typ., VF = 0.72 V max at 125°C. | Better trr but reduced current handling; suited for <2 A, higher-frequency (>500 kHz) designs. | Select when priority is minimizing Qrr over current capacity. |
| ES3D-E3/57T | DO-204AL (DO-41) package; IF(AV) = 3 A, VRRM = 200 V, trr = 35 ns, VF = 0.85 V max at 125°C. | Higher VF increases conduction loss; smaller DO-41 body limits heatsinking; not drop-in due to different lead spacing. | Use only if DO-201AD footprint is unavailable and thermal margin ≥15°C exists. |
Compared with STTH3L02RL, STTH302RL trades 5 ns of trr for +1 A current rating and better thermal robustness; versus ES3D-E3/57T, it delivers 0.1 V lower VF and superior thermal resistance-critical for sustained 3 A operation in confined spaces.
Availability
STTH302RL is available at Aetrix Electronics and suitable for switch-mode power supplies, transistor base-drive clamping circuits, DC-DC converter freewheeling paths, and inductive load flyback suppression requiring stable component supply and long-term industrial availability.
Supply support for STTH302RL 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The STTH series targets high-efficiency power conversion, with STTH302RL specifically engineered for ultrafast switching in compact, thermally demanding AC/DC and DC/DC power stages.
FAQ
What is the cathode identification method for STTH302RL?
The cathode is marked by a white band on the diode body, aligned with one axial lead. This lead must be connected toward the more positive potential in forward-biased operation. The DO-201AD package follows JEDEC standard orientation, with band position verified in ST's mechanical drawing (Doc ID 2237, Rev 3).
Can STTH302RL replace a standard FR107 in a 100 kHz flyback converter?
Yes-STTH302RL offers trr = 35 ns versus FR107's 500 ns, reducing reverse recovery loss by >90%. Its VF is comparable (0.75 V vs. 0.95 V), and DO-201AD footprint matches FR107's DO-41 only with adapter layout; direct replacement requires pad rework due to longer body and larger diameter.
What is the maximum allowable lead length for thermal derating?
Per Figure 3 in the datasheet, Rth(j-a) rises from 25 °C/W (10 mm leads) to ~75 °C/W at 2 mm leads. For reliable 3 A operation, lead length should be ≥10 mm on FR4 board; shorter leads require active cooling or current derating per Fig. 2 (e.g., 2.2 A at 70°C ambient with 5 mm leads).
Does STTH302RL meet UL94 V-0 flammability requirements?
Yes-the epoxy encapsulant meets UL94 V-0, confirmed in the "Package Mechanical Data" section (page 5) and ordering information table. This qualifies the device for use in end equipment requiring flame-retardant component housings, including Class II power supplies and industrial control panels.
STTH302RL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 3 µA @ 200 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- 175°C (Max)
STTH302RL FAQ
1.How can I place an order for STTH302RL through Aetrix?
Please submit a Request for Quotation (RFQ) for STTH302RL 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 STTH302RL reliable?
The price and inventory of STTH302RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH302RL is usually 5 days.
3.What payment methods are accepted for STTH302RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH302RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STTH302RL?
STTH302RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STTH302RL 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 STTH302RL?
For technical support, including STTH302RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH302RL requirements.
6.How does Aetrix verify that STTH302RL is sourced from the original manufacturer or authorized distributors?
All STTH302RL 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 STTH302RL meets industry standards.
7.What is the process for return or replacement of STTH302RL?
All STTH302RL units undergo pre-shipment inspection (PSI). If there is an issue with STTH302RL, 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 STTH302RL part is unused and in its original packaging.
Return procedure for STTH302RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STTH302RL Tags
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