My Inquiry
My Account
STMicroelectronics STTH1202DI
- Part No.:
- STTH1202DI
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-220-2 Insulated, TO-220AC
- Datasheet:
-
STTH1202DI.pdf
- Description:
- DIODE GP 200V 12A TO220AC INS
- Quantity:
- Payment:
- Shipping:
Inventory:8,298
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STTH1202DI from STMicroelectronics is an ultrafast recovery silicon diode in insulated TO-220AC package, rated for 200 V repetitive peak reverse voltage (VRRM), 12 A average forward current (IF(AV)), and 175 °C maximum junction temperature. It delivers low conduction losses (VF(typ) = 0.82 V at Tj = 150 °C, IF = 12 A) and fast switching performance (trr(typ) = 18 ns at IF = 1 A, dIF/dt = −100 A/µs, VR = 30 V, Tj = 25 °C), making it suitable for high-frequency inverters and free-wheeling circuits in industrial power supplies.
For engineers reviewing the STTH1202DI datasheet, STTH1202DI pinout, STTH1202DI application, or STTH1202DI equivalent, key selection criteria include its 2500 VRMS electrical insulation rating, 3.0 °C/W junction-to-case thermal resistance, and validated operation up to 175 °C junction temperature in polarity protection and base-drive switching circuits.
Technical Context
The STTH1202DI employs ST's planar platinum-doped technology to achieve low forward voltage drop and negligible switching losses across wide temperature ranges. Its dynamic behavior is characterized by tightly controlled reverse recovery time (18–35 ns) and low reverse recovery charge (Qrr), enabling efficient operation in hard-switched SMPS topologies.
Designed for insulated mounting in high-reliability power stages, it supports direct heatsink attachment without additional isolation hardware due to its 2500 VRMS reinforced insulation between case and die. Thermal performance is optimized for continuous conduction mode operation with junction temperatures up to 175 °C under TC = 130 °C conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Maximum repetitive reverse blocking voltage before avalanche breakdown; enables use in 12–48 V DC bus systems with safety margin. |
| IF(AV) | 12 A at TC = 130 °C - Average forward current capability under heatsink-cooled conditions; defines continuous power handling in rectifier/free-wheeling roles. |
| trr (typ) | 18 ns - Reverse recovery time at IF = 1 A, dIF/dt = −100 A/µs, VR = 30 V, Tj = 25 °C; ensures minimal switching loss in >100 kHz converters. |
| VF (typ) | 0.82 V at IF = 12 A, Tj = 150 °C - Forward voltage drop under worst-case thermal load; directly determines conduction loss (P ≈ 0.77×IF + 0.015×IF²). |
| Rth(j-c) | 3.0 °C/W - Junction-to-case thermal resistance for TO-220AC Ins package; enables thermal design with ≤145 °C case temperature for full 12 A rating. |
| IR (max) | 100 µA at Tj = 125 °C, VR = VRRM - Maximum reverse leakage current; ensures stable blocking in high-temperature environments. |
| Tj (max) | 175 °C - Maximum allowable junction temperature; supports operation in sealed enclosures or high ambient industrial settings. |
Pinout & Package
STTH1202DI uses a 3-terminal TO-220AC Ins package with electrically insulated metal tab (2500 VRMS isolation). The case serves as the cathode terminal, while the two leads are anode and cathode-standard configuration for single-diode rectifiers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to source side of switching node; must withstand surge current up to 100 A (IFSM) during fault events. |
| Cathode (Lead 2) | Forward current exit / reverse blocking node | Typically tied to ground or low-side switch; carries full output current and defines return path for freewheeling energy. |
| Insulated Case (Tab) | Thermal interface / mechanical mounting surface | Electrically isolated from die (2500 VRMS); allows direct bolt-down to grounded heatsink without external insulator. |
Key Features
| Feature | Design Value |
|---|---|
| Ultrafast recovery | trr = 18 ns typical enables >200 kHz switching in PFC and LLC resonant converters without excessive EMI or loss penalty. |
| High junction temperature rating | 175 °C max Tj allows sustained operation in compact, thermally constrained industrial enclosures without derating. |
| Reinforced electrical insulation | 2500 VRMS isolation between die and case eliminates need for mica washers or silicone pads in safety-critical power stages. |
| Low conduction loss | VF = 0.82 V @ 12 A / 150 °C reduces I²R heating and improves efficiency over standard FRD alternatives in 12–24 V systems. |
Applications
| DC-DC Converter Output Rectification | Motor Drive Freewheeling Diode |
|---|---|
|
Use Scenario: Used in secondary-side synchronous rectification or Schottky-assisted flyback converters delivering 12–48 V at up to 15 A. IC Role / Device Role / Timing Role: Ultrafast unidirectional current path that recovers before next switching cycle, minimizing cross-conduction loss. Use Value: 18 ns trr and 0.82 V VF reduce conduction + switching loss by ~18% vs. standard FRD in 100–200 kHz designs. |
Use Scenario: Mounted across brushed DC motor terminals or IGBT collector-emitter in H-bridge drives. IC Role / Device Role / Timing Role: Provides low-loss path for inductive kickback current during PWM off-time. Use Value: 100 A non-repetitive surge rating and 175 °C Tj ensure reliability during stall or overload transients. |
| Input Polarity Protection | Switch-Mode Base Drive Clamp |
|
Use Scenario: Placed in series with input supply rail of industrial PLC modules or embedded controllers. IC Role / Device Role / Timing Role: Blocks reverse voltage while conducting forward current with minimal drop during normal operation. Use Value: 200 V VRRM and 12 A IF(AV) support 24/48 V systems with >2× safety margin against line surges. |
Use Scenario: Connected across BJT or MOSFET base/gate drive transformer secondaries in isolated gate drivers. IC Role / Device Role / Timing Role: Clamps reverse voltage spikes generated during transformer reset, protecting driver ICs. Use Value: Low IR (≤100 µA @ 125 °C) prevents false turn-on; fast trr avoids latch-up in high-duty-cycle drive signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1202D | Same die, TO-220AC (non-insulated); Rth(j-c) = 2.5 °C/W; no electrical isolation. | Requires external insulator for heatsink mounting; unsuitable where creepage/clearance mandates isolation. | Select when cost sensitivity outweighs isolation requirement and thermal margin permits lower Rth. |
| STTH12R06 | 600 V VRRM, same IF(AV) = 12 A, trr = 35 ns (typ), VF = 1.7 V (typ) @ 12 A. | Higher voltage rating trades off higher VF and slower recovery; suited for 300–400 V bus systems. | Choose only if system requires >200 V blocking; avoid in 24/48 V applications due to 108% higher conduction loss. |
Compared with STTH1202D and STTH12R06, STTH1202DI uniquely combines 2500 VRMS insulation, 200 V rating, and 18 ns trr-making it the only option for space-constrained, isolated, high-frequency 24–48 V power stages requiring both safety compliance and efficiency.
Availability
STTH1202DI is available at Aetrix Electronics and suitable for industrial power supplies, motor control modules, and telecom rectifiers requiring stable component supply, long-term lifecycle assurance, and certified ECOPACK® lead-free packaging.
Supply support for STTH1202DI 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 industrial, automotive, and consumer markets.
STTH1202DI belongs to ST's ultrafast recovery diode product line, engineered specifically for high-efficiency, high-frequency switching power conversion in industrial and telecom infrastructure where thermal robustness and electrical isolation are critical.
FAQ
What is the maximum recommended heatsink temperature for continuous 12 A operation?
The STTH1202DI is rated for IF(AV) = 12 A at TC = 130 °C. With Rth(j-c) = 3.0 °C/W and Tj(max) = 175 °C, the maximum allowable heatsink temperature is 130 °C. Exceeding this requires derating per Figure 1 in the datasheet, where δ = 0.5 duty cycle defines the 12 A limit.
Can STTH1202DI be used in place of a Schottky diode in 24 V output rectification?
Yes, but only where reverse voltage stress stays below 200 V. Unlike Schottky diodes, STTH1202DI has no soft reverse recovery and exhibits higher VF (0.82 V vs. ~0.45 V), increasing conduction loss. However, its 175 °C Tj and 2500 VRMS insulation make it preferable in high-temp or safety-isolated designs where Schottky leakage would be excessive.
Is the TO-220AC Ins package compatible with standard TO-220 mounting hardware?
Yes-the TO-220AC Ins package retains identical mechanical footprint and screw hole placement (Ø3.75–3.85 mm, torque 0.55 Nm recommended) as standard TO-220AC. The insulation is achieved via molded epoxy barrier between die and tab, not dimensional change, ensuring drop-in replacement in existing PCB layouts and heatsink fixtures.
Does STTH1202DI meet RoHS and REACH requirements?
Yes. STTH1202DI is manufactured in ST's ECOPACK®-compliant process, featuring lead-free second-level interconnects and halogen-free molding compound. It meets RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with full compliance documentation available on www.st.com under ECOPACK specifications.
STTH1202DI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-2 Insulated, TO-220AC
- Packaging:
- Tube
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 12A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 12 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 35 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 200 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AC ins
- Operating Temperature - Junction:
- 175°C (Max)
STTH1202DI FAQ
1.How can I place an order for STTH1202DI through Aetrix?
Please submit a Request for Quotation (RFQ) for STTH1202DI 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 STTH1202DI reliable?
The price and inventory of STTH1202DI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STTH1202DI is usually 5 days.
3.What payment methods are accepted for STTH1202DI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STTH1202DI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STTH1202DI?
STTH1202DI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STTH1202DI 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 STTH1202DI?
For technical support, including STTH1202DI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STTH1202DI requirements.
6.How does Aetrix verify that STTH1202DI is sourced from the original manufacturer or authorized distributors?
All STTH1202DI 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 STTH1202DI meets industry standards.
7.What is the process for return or replacement of STTH1202DI?
All STTH1202DI units undergo pre-shipment inspection (PSI). If there is an issue with STTH1202DI, 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 STTH1202DI part is unused and in its original packaging.
Return procedure for STTH1202DI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STTH1202DI Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
