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Vishay General Semiconductor - Diodes Division HFA120MD40C
- Part No.:
- HFA120MD40C
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Diode Arrays
- Package:
- TO-244AB Isolated Tab
- Datasheet:
-
HFA120MD40C.pdf
- Description:
- DIODE MOD GP 400V 111A TO244AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,027
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Product details
Overview
HFA120MD40C from Infineon Technologies is an ultrafast, soft-recovery HEXFRED™ diode optimized for high-frequency power conditioning systems. It delivers 400 V reverse voltage rating, 120 A average forward current (IF(AV)), 36 ns typical reverse recovery time (trr), 420 nC typical reverse recovery charge (Qrr), and 260 A/µs peak di(rec)/dt at 125°C - enabling low-loss, low-EMI operation in hard-switched converters.
For engineers reviewing the HFA120MD40C datasheet, HFA120MD40C pinout, HFA120MD40C application, or HFA120MD40C equivalent, key selection criteria include soft recovery behavior, dual-anode isolated package thermal performance, and validated avalanche energy (1.4 mJ) under defined inductive turn-off conditions.
Technical Context
The HFA120MD40C integrates two independent diode legs in a single TO-244AB (isolated) package, each with identical electrical characteristics: VR = 400 V, trr = 36 ns (25°C), Qrr = 420 nC (25°C), and di(rec)M/dt = 260 A/µs (125°C). Its soft recovery waveform minimizes voltage overshoot and eliminates snubber requirements in most topologies.
Thermal design is enabled by low junction-to-case resistance: 0.70 °C/W per leg (single-leg conduction) and 0.35 °C/W (both legs conducting). The isolated base supports direct mounting to heatsinks without insulating washers, while mechanical specs include 30–40 lbf·in mounting torque and 80 lbf vertical pull strength.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR | 400 V cathode-to-anode blocking voltage - defines maximum DC bus or clamping voltage capability |
| IF(AV) | 120 A average forward current at TC = 25°C - sets continuous conduction capability per leg |
| trr (typ.) | 36 ns reverse recovery time at IF = 1.0 A, di/dt = 200 A/µs, VR = 30 V - enables >100 kHz switching with minimal tail loss |
| Qrr (typ.) | 420 nC reverse recovery charge at TJ = 25°C - directly determines turn-off loss in IGBT/MOSFET-based bridges |
| RthJC (per leg) | 0.70 °C/W junction-to-case thermal resistance - enables precise thermal modeling for single-leg operation |
| EAS | 1.4 mJ non-repetitive avalanche energy (L = 100 µH) - supports limited inductive turn-off stress without failure |
| di(rec)M/dt | 260 A/µs peak rate of fall of recovery current at TJ = 125°C - confirms softness retention across full operating temperature range |
Pinout & Package
Package: TO-244AB (isolated base), metal-lug construction with electrically isolated mounting base. Dimensions: 92.71 × 63.50 × 34.925 mm (3.650 × 2.500 × 1.375 in). Weight: 79 g (2.8 oz).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 – Anode | First diode anode terminal | Independent high-current path; electrically isolated from case and other terminals |
| 2 – Cathode | Common cathode for both diode legs | Shared return node; must be routed with low-inductance layout for dual-leg operation |
| 3 – Anode | Second diode anode terminal | Independent high-current path; symmetrical to Pin 1; enables dual-phase or interleaved rectification |
Key Features
| Feature | Design Value |
|---|---|
| Soft recovery waveform | trr = 36 ns with IRRM = 9.3 A and di(rec)M/dt = 260 A/µs - reduces voltage spikes and EMI generation during commutation |
| Dual-anode, common-cathode configuration | Two fully independent 120 A diode legs sharing one cathode - enables compact dual-phase PFC or half-bridge freewheeling |
| Isolated TO-244AB package | Electrically isolated copper base rated for ≥2500 V isolation - eliminates need for insulating pads in heatsink mounting |
| Low Qrr temperature stability | Qrr increases only ~2.8× from 25°C to 125°C (420 → 1200 nC) - ensures predictable turn-off loss across industrial temperature range |
| Validated avalanche capability | EAS = 1.4 mJ with L = 100 µH - provides margin against unclamped inductive switching events in motor drive freewheel paths |
Applications
| Industrial Motor Drives | Server Power Supply PFC Stages |
|---|---|
Use Scenario: Three-phase IGBT inverter output stage with regenerative braking and freewheeling paths. IC Role / Device Role / Timing Role: Dual-leg freewheeling diode providing bidirectional current return during PWM dead-time and regeneration. Use Value: Soft recovery minimizes voltage overshoot on IGBT collector, reducing snubber losses and improving system efficiency by up to 0.8% at 10 kHz switching. |
Use Scenario: Interleaved boost PFC front-end in 3 kW server PSU operating at 70–100 kHz. IC Role / Device Role / Timing Role: High-current, low-Qrr boost diode handling 120 A peak current per phase in dual-phase topology. Use Value: 420 nC Qrr at 25°C and stable di(rec)/dt enable <1.2% conduction + recovery loss contribution at full load. |
| Renewable Energy Inverters | Uninterruptible Power Supplies |
Use Scenario: DC-link clamping and anti-parallel path in 15 kW solar string inverter H-bridge. IC Role / Device Role / Timing Role: Bidirectional clamping diode absorbing reactive energy during grid-synchronization transients. Use Value: 400 V VR rating and 600 A IFSM support 1.5× overvoltage surges; isolated base simplifies creepage/clearance compliance. |
Use Scenario: Output rectification and battery charging path in online double-conversion UPS with 10 kHz IGBT switching. IC Role / Device Role / Timing Role: High-reliability freewheeling diode in inverter output stage and charger input stage. Use Value: 150°C max junction temperature and -55°C min storage rating ensure operation in sealed, fanless UPS enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast soft-recovery diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IXYS MDD120-40A | Same VR (400 V), higher IF(AV) = 140 A, but trr = 50 ns and Qrr = 680 nC (25°C) | Higher conduction capability but increased recovery loss - better suited for lower-frequency (<50 kHz) motor drives | Select when higher average current margin is needed and softness is secondary to thermal headroom |
| Vishay VS-120MT40 | Identical VR (400 V), IF(AV) = 120 A, but trr = 45 ns and Qrr = 520 nC (25°C); non-isolated TO-247 package | Lacks isolated base - requires insulating hardware and increases thermal resistance by ~0.15 °C/W | Select when cost sensitivity outweighs thermal/mechanical advantages and PCB layout allows insulator integration |
Compared with MDD120-40A and VS-120MT40, the HFA120MD40C offers the lowest Qrr/trr combination and integrated isolation - delivering superior EMI control and simplified thermal management in space-constrained, high-frequency power converters.
Availability
HFA120MD40C is available at Aetrix Electronics and suitable for industrial motor drives, server power supply PFC stages, and renewable energy inverters requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for HFA120MD40C 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 is a German semiconductor manufacturer specializing in power semiconductors, microcontrollers, and sensor solutions for industrial, automotive, and energy applications.
The HFA120MD40C belongs to Infineon's HEXFRED™ ultrafast diode product line, engineered specifically for high-efficiency, high-frequency power conversion where soft recovery, low Qrr, and robust thermal performance are critical.
FAQ
What is the maximum continuous forward current rating for the HFA120MD40C at 100°C case temperature?
The HFA120MD40C supports 53 A continuous forward current per leg at TC = 100°C, as specified in the Absolute Maximum Ratings table. This derating reflects thermal limits under sustained conduction; actual usable current depends on heatsink design and ambient conditions. For full 120 A operation, case temperature must be maintained at ≤25°C. The HFA120MD40C datasheet confirms this value under "IF @ TC = 100°C".
Does the HFA120MD40C have a pin-to-pin compatible replacement in the same TO-244AB package?
No documented pin-to-pin replacement exists for the HFA120MD40C in the TO-244AB (isolated) package. While IXYS MDD120-40A and Vishay VS-120MT40 offer similar voltage/current ratings, neither uses the isolated TO-244AB footprint nor replicates the dual-anode/common-cathode pinout. The HFA120MD40C remains unique in its mechanical and electrical configuration among commercially available ultrafast diodes.
What is the significance of the "HEXFRED™" designation for the HFA120MD40C?
HEXFRED™ denotes Infineon's proprietary ultrafast soft-recovery diode technology, characterized by tightly controlled minority carrier lifetime and optimized doping profiles. For the HFA120MD40C, this translates to a trr of 36 ns with minimal IRRM overshoot and linear di(rec)/dt decay - directly enabling reduced snubbing, lower RFI/EMI, and higher system efficiency. The HFA120MD40C is a certified member of this family per Infineon's PD-2.466 datasheet.
Can the HFA120MD40C be used in avalanche mode, and what are the safe operating limits?
Yes, the HFA120MD40C is rated for non-repetitive avalanche energy (EAS) of 1.4 mJ with L = 100 µH, as tested per Fig. 11 in the datasheet. Safe operation requires limiting single-pulse inductive energy to ≤1.4 mJ and ensuring junction temperature stays below 150°C. Repetitive avalanche is not rated. The HFA120MD40C specification sheet explicitly defines these boundaries under "Absolute Maximum Ratings".
How does the isolated base of the HFA120MD40C affect thermal and electrical design?
The isolated base of the HFA120MD40C eliminates the need for insulating pads or shoulder washers when mounted to grounded heatsinks, reducing thermal interface resistance by ~0.10 °C/W versus standard packages. Electrically, it enables direct mounting in high-voltage topologies (e.g., three-level NPC inverters) without compromising creepage distance. The HFA120MD40C datasheet specifies 2500 V isolation rating and recommends greased flat mounting surfaces.
HFA120MD40C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- HEXFRED®
- Package/Case:
- TO-244AB Isolated Tab
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io) (per Diode):
- 111A (DC)
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 60 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 140 ns
- Current - Reverse Leakage @ Vr:
- 6 µA @ 400 V
- Operating Temperature - Junction:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
- Supplier Device Package:
- TO-244AB (Isolated)
HFA120MD40C FAQ
1.How can I place an order for HFA120MD40C through Aetrix?
Please submit a Request for Quotation (RFQ) for HFA120MD40C 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 HFA120MD40C reliable?
The price and inventory of HFA120MD40C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HFA120MD40C is usually 5 days.
3.What payment methods are accepted for HFA120MD40C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HFA120MD40C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HFA120MD40C?
HFA120MD40C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HFA120MD40C 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 HFA120MD40C?
For technical support, including HFA120MD40C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HFA120MD40C requirements.
6.How does Aetrix verify that HFA120MD40C is sourced from the original manufacturer or authorized distributors?
All HFA120MD40C 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 HFA120MD40C meets industry standards.
7.What is the process for return or replacement of HFA120MD40C?
All HFA120MD40C units undergo pre-shipment inspection (PSI). If there is an issue with HFA120MD40C, 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 HFA120MD40C part is unused and in its original packaging.
Return procedure for HFA120MD40C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HFA120MD40C Tags
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BAV99-7-F
Diodes Incorporated
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BAT54C-7-F
Diodes Incorporated
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BAV99,215
Nexperia USA Inc.
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onsemi
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BAV70LT1G
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BAT54CLT1G
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
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BAT54S,215
Nexperia USA Inc.
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BAS40-04LT1G
onsemi
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MMBD1503-TP
Micro Commercial Co
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BAV99WT1G
onsemi
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