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Vishay General Semiconductor - Diodes Division 30CTQ045
- Part No.:
- 30CTQ045
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
30CTQ045.pdf
- Description:
- DIODE ARR SCHOTT 45V 15A TO2203
- Quantity:
- Payment:
- Shipping:
Inventory:7,724
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Product details
Overview
30CTQ045 from Vishay is a center-tap dual common-cathode Schottky rectifier rated for 2 × 15 A average forward current per leg, 45 V maximum reverse voltage, and 175 °C junction temperature operation in TO-220AB package - used in high-efficiency DC/DC converters and reverse battery protection circuits.
For engineers reviewing the 30CTQ045 datasheet, 30CTQ045 pinout, 30CTQ045 application, or 30CTQ045 equivalent, key selection criteria include its low 0.56 V forward voltage at 15 A/125 °C, 1060 A non-repetitive surge rating, and thermal resistance of 3.25 °C/W per leg - critical for high-power industrial SMPS and automotive power management designs.
Technical Context
This dual-leg Schottky rectifier integrates two independent anodes sharing a common cathode terminal, enabling synchronous freewheeling or dual-output rectification. Its proprietary barrier technology enables stable operation up to 175 °C with low leakage (15 mA at 125 °C) and fast recovery (dV/dt = 10,000 V/µs).
The TO-220AB package features a metal tab electrically connected to the common cathode, supporting direct heatsink mounting with 0.50 °C/W case-to-heatsink thermal resistance. Each leg exhibits 900 pF junction capacitance at 5 V and 8.0 nH series inductance - optimized for high-frequency switching above 100 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) per leg | 15 A average (30 A total package), supports continuous 30 W output in 12 V input converters |
| VRRM | 45 V DC reverse blocking - suitable for 36 V nominal battery systems with margin |
| VF @ 15 A / 125 °C | 0.56 V - reduces conduction loss by ~35% vs. standard silicon diodes at same current |
| IFSM per leg | 1060 A peak surge (5 µs sine) - withstands inrush and fault transients in motor drives |
| RthJC per leg | 3.25 °C/W - enables 25 W dissipation with ≤80 °C case rise at 175 °C max TJ |
| IRM @ 125 °C | 15 mA reverse leakage - limits standby power loss in always-on automotive modules |
| dV/dt | 10,000 V/µs - prevents false turn-on during fast-switching MOSFET gate drive transitions |
Pinout & Package
TO-220AB package with insulated metal tab (cathode-connected), 3-pin configuration: Pin 1 = Anode 1, Pin 2 = Common Cathode (tab), Pin 3 = Anode 2. Mounting torque: 6–12 kgf·cm (5–10 lbf·in).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode 1 | Input terminal for first rectifier leg - connects to primary-side switch node in half-bridge topology |
| Pin 2 (Tab) | Common Cathode | Electrically tied to metal tab; must be thermally and electrically connected to heatsink and system ground/reference |
| Pin 3 | Anode 2 | Input terminal for second rectifier leg - enables dual-output or interleaved converter configurations |
Key Features
| Feature | Design Value |
|---|---|
| 175 °C TJ rating | Enables operation in under-hood automotive environments without derating below 15 A/leg |
| Guard ring structure | Improves ruggedness against voltage transients and mechanical stress-induced failure |
| High-purity epoxy encapsulation | Provides IPC-J-STD-020 moisture sensitivity level 1 (MSL-1) performance without baking |
| Low VF + low CT synergy | Combines 0.56 V forward drop with 900 pF capacitance - optimizes efficiency in 200–500 kHz SMPS |
| Industrial qualification | Qualified per AEC-Q101 stress test conditions for reliability in industrial control and telecom power supplies |
Applications
| DC/DC Converter Output Rectification | Reverse Battery Protection |
|---|---|
Use Scenario: High-current 12 V → 5 V/3.3 V buck converter in industrial PLC power module. IC Role / Device Role / Timing Role: Dual-leg Schottky rectifier replacing synchronous MOSFETs where gate drive complexity must be minimized. Use Value: 0.56 V VF at 15 A/125 °C cuts conduction loss by 2.1 W per leg vs. 0.85 V alternative - improving full-load efficiency by 1.8%. | Use Scenario: 24 V vehicle battery interface protecting downstream CAN/LIN controllers from polarity reversal. IC Role / Device Role / Timing Role: Low-VF series-blocking diode with 45 V VR rating - clamps reverse voltage before damage occurs. Use Value: 15 mA IRM at 125 °C ensures <150 µW standby dissipation - critical for always-on telematics units. |
| Freewheeling Diode in Motor Drives | Redundant Power OR-ing |
Use Scenario: IGBT-based 3-phase inverter driving 1 kW HVAC blower with regenerative braking. IC Role / Device Role / Timing Role: Freewheel path for inductive kickback during PWM off-time - handles 1060 A surge peaks. Use Value: 10,000 V/µs dV/dt rating prevents spurious conduction during 600 V/ns IGBT switching edges. | Use Scenario: Dual 28 V DC power inputs (main + backup) feeding avionics subsystem with automatic source selection. IC Role / Device Role / Timing Role: Common-cathode dual-anode configuration enables compact OR-ing with shared cathode return path. Use Value: 3.25 °C/W RthJC allows parallel operation at 15 A/leg without forced air - simplifying thermal design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-30CPH045 | Same 45 V VRRM, but single-anode + cathode (not center-tap); TO-247 package; higher VF (0.65 V @ 15 A/125 °C) | Lacks dual-anode functionality - unsuitable for center-tapped transformer or dual-output topologies | Select only when discrete anode routing is preferred and thermal budget allows higher VF loss |
| ON Semiconductor MBR3045CT | Identical 45 V/2×15 A rating and TO-220AB package; VF slightly higher (0.60 V @ 15 A/125 °C); no guard ring | Lower ruggedness margin in high-vibration environments; same pinout but different marking and thermal profile | Valid functional alternative where guard ring and 175 °C rating are not required |
Compared with VS-30CPH045 and MBR3045CT, the 30CTQ045 uniquely combines center-tap topology, 175 °C capability, and guard ring ruggedness - making it the only choice for high-reliability dual-leg rectification in automotive and industrial power stages where thermal margin and transient immunity are critical.
Availability
30CTQ045 is available at Aetrix Electronics and suitable for DC/DC converters, reverse battery protection circuits, and motor drive freewheeling diodes requiring stable component supply across automotive, industrial automation, and telecom infrastructure programs.
Supply support for 30CTQ045 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
Vishay Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements - with leadership in power rectifiers, MOSFETs, and precision resistors.
The 30CTQ... Series was developed for high-efficiency, high-temperature power conversion in industrial and automotive applications - emphasizing low VF, rugged packaging, and extended thermal operating range.
FAQ
What is the maximum junction temperature rating for the 30CTQ045?
The 30CTQ045 has a maximum junction temperature (TJ) rating of 175 °C, verified per Vishay's industrial qualification standards. This allows sustained operation at full 15 A/leg current in ambient temperatures up to 100 °C when properly heatsinked. The 30CTQ045 achieves this via high-purity epoxy encapsulation and proprietary Schottky barrier metallization - critical for under-hood automotive and enclosed industrial power supplies.
Is the metal tab on the 30CTQ045 electrically isolated?
No, the metal tab on the 30CTQ045 is not electrically isolated - it is internally connected to the common cathode (Pin 2). This requires electrical insulation from the heatsink unless the cathode node is at system ground potential. The 30CTQ045 datasheet specifies mounting torque of 6–12 kgf·cm and recommends thermal grease with dielectric properties if isolation is needed - unlike insulated-tab variants such as the 30CTQ045S.
What is the forward voltage drop of the 30CTQ045 at 30 A total current?
At 30 A total current (15 A per leg), the 30CTQ045 exhibits a forward voltage drop of 0.56 V per leg at TJ = 125 °C, as confirmed in the Electrical Specifications table. At room temperature (25 °C), VF rises to 0.62 V per leg at 15 A. The 30CTQ045 maintains this low VF across its full operating range due to optimized barrier height and low-resistance metallization - directly reducing conduction losses in high-current SMPS designs.
Does the 30CTQ045 have avalanche energy rating?
Yes, the 30CTQ045 is rated for 20 mJ non-repetitive avalanche energy per leg (EAS), measured at TJ = 25 °C with IAS = 3.0 A and L = 4.40 mH. It also supports 3.0 A repetitive avalanche current (IAR) with linear current decay in 1 µs. These ratings confirm robustness against inductive switching transients - essential for use as a freewheeling diode in motor drives and unregulated flyback converters where voltage spikes exceed VRRM.
Can the 30CTQ045 replace the 30CTQ040 in existing designs?
Yes, the 30CTQ045 can directly replace the 30CTQ040 in most designs because both share identical package (TO-220AB), pinout, thermal characteristics, and current ratings - differing only in maximum reverse voltage (45 V vs. 40 V). The 30CTQ045 provides additional margin for 36 V battery systems experiencing load dump or line transients. No PCB or thermal redesign is needed, and the 30CTQ045 maintains the same 0.56 V VF and 175 °C TJ capability as the 30CTQ040.
30CTQ045 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io) (per Diode):
- 15A
- Voltage - Forward (Vf) (Max) @ If:
- 620 mV @ 15 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 2 mA @ 45 V
- Operating Temperature - Junction:
- -55°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
30CTQ045 FAQ
1.How can I place an order for 30CTQ045 through Aetrix?
Please submit a Request for Quotation (RFQ) for 30CTQ045 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 30CTQ045 reliable?
The price and inventory of 30CTQ045 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 30CTQ045 is usually 5 days.
3.What payment methods are accepted for 30CTQ045?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 30CTQ045 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 30CTQ045?
30CTQ045 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 30CTQ045 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 30CTQ045?
For technical support, including 30CTQ045 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 30CTQ045 requirements.
6.How does Aetrix verify that 30CTQ045 is sourced from the original manufacturer or authorized distributors?
All 30CTQ045 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 30CTQ045 meets industry standards.
7.What is the process for return or replacement of 30CTQ045?
All 30CTQ045 units undergo pre-shipment inspection (PSI). If there is an issue with 30CTQ045, 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 30CTQ045 part is unused and in its original packaging.
Return procedure for 30CTQ045:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
30CTQ045 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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BAT54SLT1G
onsemi
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BAV70LT1G
onsemi
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BAT54CLT1G
onsemi
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BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
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MMBD1503-TP
Micro Commercial Co
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BAV99WT1G
onsemi
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