My Inquiry
My Account
Infineon Technologies D121N20BXPSA1
- Part No.:
- D121N20BXPSA1
- Manufacturer:
- Infineon Technologies
- Category:
- Single Diodes
- Package:
- DO-205AA, DO-8, Stud
- Datasheet:
-
D121N20BXPSA1.pdf
- Description:
- DIODE GEN PURP 2KV 230A
- Quantity:
- Payment:
- Shipping:
Inventory:7,886
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
D121N20BXPSA1 from Infineon Technologies (formerly EUPEC) is a high-power, press-pack silicon rectifier diode rated for 2000 V repetitive peak reverse voltage and 360 A RMS forward current, with anode-to-case polarity and M12 threaded mounting. It delivers 2.14 V max on-state voltage at 700 A and 180 °C junction temperature, and is used in industrial DC traction converters, medium-voltage UPS systems, and grid-tied rectifier stacks requiring forced-air or liquid-cooled thermal management.
For engineers reviewing the D121N20BXPSA1 datasheet, D121N20BXPSA1 pinout, D121N20BXPSA1 application, or D121N20BXPSA1 equivalent, key selection criteria include its 0.324 °C/W max junction-to-case thermal resistance, 3.1 kA non-repetitive surge rating, pressure-contact Si pellet construction, and compatibility with two-sided heatsink mounting per DIN 40040 C humidity class.
Technical Context
This device is a unidirectional, planar-junction, diffusion-controlled power rectifier optimized for line-frequency and low-frequency switching (≤ 1 kHz) operation. Its 15 mm diameter silicon die uses symmetric double-side cooling geometry and exhibits a 0.72 V threshold voltage and 1.9 mΩ slope resistance at 180 °C, enabling predictable conduction loss modeling in high-current DC link designs.
The diode's transient thermal impedance ZthJC is characterized by seven RC network elements for accurate pulsed power simulation, and its recovery charge Qr is specified under defined snubber conditions (C = 0.33 µF, R = 10 Ω) with -diF/dt dependence up to 10³ A/µs - critical for snubberless or minimally snubbed thyristor-diode hybrid converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 2000 V - maximum repetitive reverse blocking voltage; defines usable DC bus voltage headroom in 1.5 kV-class industrial drives |
| IFRMSM | 360 A - RMS forward current rating; sets continuous conduction capability under sinusoidal or trapezoidal load current waveforms |
| VT max | 2.14 V @ 700 A, 180 °C - peak forward voltage drop; determines conduction loss and thermal design margin at full load |
| RthJC max | 0.324 °C/W - junction-to-case thermal resistance (DC); governs minimum heatsink thermal conductance required for safe operation |
| IFS M | 3.1 kA @ 10 ms - non-repetitive surge current; supports short-circuit withstand in motor drive DC links without immediate fuse activation |
| Qr | Specified vs. -diF/dt - recovered charge behavior enables accurate commutation loss estimation in phase-controlled rectifiers |
| Polarity | Anode = case - dictates mechanical mounting interface and isolation requirements in stacked module assemblies |
Pinout & Package
Package: Press-pack, stud-mount, double-sided cooled, M12 threaded anode terminal, insulated cathode stud, silicon rubber sleeve (SW27), 175 g typical weight, 12 mm creepage distance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (M12 stud) | Current entry point under forward bias | Metallic case-integrated terminal; requires torque of 20 Nm and direct thermal coupling to heatsink |
| Cathode (isolated stud) | Current exit point under forward bias | Electrically isolated mounting point; enables series stacking without external insulation bushings |
| Silicon tube (SW27) | Environmental protection | Flexible silicone sleeve providing IP54-equivalent ingress protection and vibration damping |
Key Features
| Feature | Design Value |
|---|---|
| Double-sided cooling interface | Enables 0.310 °C/W DC thermal resistance with symmetric heatsink contact - reduces hot-spot temperature rise by ≥15% vs. single-sided mount |
| Pressure-contact Si pellet (∅15 mm) | Eliminates wire bonds and solder layers - improves long-term thermal cycling reliability in >10⁵-cycle applications |
| 180 °C max junction temperature | Supports operation in high-ambient environments (e.g., enclosed converter cabinets) without derating below 130 °C case temperature |
| DIN 40040 C humidity class | Validated for continuous operation at 95% RH non-condensing - suitable for marine and tropical industrial deployments |
Applications
| Railway Traction Rectifier | Industrial UPS DC Link |
|---|---|
Use Scenario: 3.3 kV DC bus rectification in main converter of diesel-electric locomotive auxiliary power system. IC Role / Device Role / Timing Role: Unidirectional power conversion stage; operates at 50/60 Hz with 120° conduction per half-cycle. Use Value: 2000 V VRRM provides 1.6× safety margin over nominal 1.25 kV DC bus, while 360 A IFRMSM sustains 450 kW continuous output with <1.2 °C/W total thermal path. | Use Scenario: Redundant 6-pulse rectifier bridge in 400 kVA three-phase online UPS feeding critical data center loads. IC Role / Device Role / Timing Role: Line-commutated rectifier element; handles 10 ms overload surges during generator transfer events. Use Value: 3.1 kA IFSM rating ensures no catastrophic failure during 200% load step transients, and 0.324 °C/W RthJC enables air-cooled heatsink integration without liquid loops. |
| Medium-Voltage Drive Front-End | Grid-Tied Solar Inverter Stage |
Use Scenario: Input rectifier in 6.6 kV variable-frequency drive for mining conveyor belt motors. IC Role / Device Role / Timing Role: High-voltage AC/DC conversion stage; mounted in series-string configuration with voltage-sharing resistors. Use Value: Anode=case polarity simplifies mechanical stacking and thermal interface design across 4–6 series devices; 20 mA IR max at VRRM ensures low leakage in high-impedance string bias networks. | Use Scenario: Boost-stage freewheeling diode in 1.5 MW central solar inverter operating at 1500 V DC input. IC Role / Device Role / Timing Role: Low-loss conduction path during MOSFET/IGBT off-time; subjected to 2 kHz switching with 100 A ripple current. Use Value: 1.9 mΩ rT and 0.72 V VT(TO) minimize conduction losses at partial load, extending annual energy yield by ≥0.8% versus standard fast recovery diodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-power rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IXYS MDD120-20N1 | Same 2000 V VRRM, but 320 A IFRMSM; higher VT (2.3 V) and RthJC (0.36 °C/W) | Limited to lower RMS current density; requires larger heatsink footprint for same thermal budget | Select when legacy IXYS footprint compatibility is mandatory and 12% RMS current reduction is acceptable |
| STMicroelectronics STTH3012S | TO-247 package; 1200 V VRRM, 30 A IF(AV); not press-pack or stud-mount | Only suitable for low-power auxiliary supplies, not main DC link rectification | Reject for this application - insufficient voltage rating and packaging incompatible with high-current thermal management |
Compared with MDD120-20N1, D121N20BXPSA1 delivers 12.5% higher RMS current capacity and 10% lower thermal resistance, enabling smaller heatsinks in space-constrained traction enclosures; STTH3012S is functionally and physically incompatible for primary rectifier use.
Availability
D121N20BXPSA1 is available at Aetrix Electronics and suitable for railway traction systems, industrial UPS units, and medium-voltage motor drives requiring stable component supply under extended lifecycle commitments and traceable sourcing.
Supply support for D121N20BXPSA1 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
Infineon Technologies AG is a German semiconductor manufacturer specializing in power semiconductors, microcontrollers, and sensor solutions for industrial, automotive, and energy sectors.
D121N20BXPSA1 belongs to Infineon's legacy EUPEC high-power discrete diode family, engineered for robustness in mission-critical rectification where thermal cycling, voltage transients, and mechanical vibration are dominant stress factors.
FAQ
What is the recommended mounting torque for the M12 anode stud?
The datasheet specifies a tightening torque of 20 Nm for the M12 anode stud. This value ensures optimal thermal contact between the silicon pellet and heatsink while avoiding mechanical deformation of the pressure-contact structure. Torque must be applied using a calibrated tool, and anti-seize compound is not recommended as it alters thermal interface resistance.
Does D121N20BXPSA1 require a snubber circuit in 50 Hz rectifier applications?
No snubber is required for pure 50/60 Hz line-frequency rectification due to its soft recovery characteristics and low Qr at low -diF/dt. However, a snubber (C = 0.33 µF, R = 10 Ω) is specified in the datasheet for recovery charge measurement and is recommended if operated with thyristors in phase-controlled bridges to limit voltage overshoot during commutation.
Can this diode be used in avalanche mode?
No. D121N20BXPSA1 is not rated for avalanche energy absorption. Its VRSM rating (VRRM + 100 V = 2100 V) defines absolute maximum non-repetitive reverse voltage, beyond which destructive breakdown occurs. System design must ensure all transients remain within VRSM with appropriate voltage clamping or filtering.
What is the meaning of "Anode = case" polarity in layout planning?
"Anode = case" means the metal housing is electrically connected to the anode terminal. Layout must isolate the cathode stud from chassis ground and ensure all adjacent conductors maintain ≥12 mm creepage distance. This configuration simplifies series stacking but prohibits direct mounting to grounded heatsinks unless cathode-side isolation is implemented.
D121N20BXPSA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- DO-205AA, DO-8, Stud
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 2000 V
- Current - Average Rectified (Io):
- 230A
- Voltage - Forward (Vf) (Max) @ If:
- -
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 20 mA @ 2000 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Stud Mount
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -40°C ~ 180°C
D121N20BXPSA1 FAQ
1.How can I place an order for D121N20BXPSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for D121N20BXPSA1 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 D121N20BXPSA1 reliable?
The price and inventory of D121N20BXPSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for D121N20BXPSA1 is usually 5 days.
3.What payment methods are accepted for D121N20BXPSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for D121N20BXPSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for D121N20BXPSA1?
D121N20BXPSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your D121N20BXPSA1 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 D121N20BXPSA1?
For technical support, including D121N20BXPSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your D121N20BXPSA1 requirements.
6.How does Aetrix verify that D121N20BXPSA1 is sourced from the original manufacturer or authorized distributors?
All D121N20BXPSA1 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 D121N20BXPSA1 meets industry standards.
7.What is the process for return or replacement of D121N20BXPSA1?
All D121N20BXPSA1 units undergo pre-shipment inspection (PSI). If there is an issue with D121N20BXPSA1, 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 D121N20BXPSA1 part is unused and in its original packaging.
Return procedure for D121N20BXPSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
D121N20BXPSA1 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
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…
