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Diodes Incorporated SBR1A40S3Q-7
- Part No.:
- SBR1A40S3Q-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SBR1A40S3Q-7.pdf
- Description:
- DIODE SBR 40V 1A SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:10,512
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Product details
Overview
SBR1A40S3Q-7 from Diodes Incorporated is a 1A, 40V Super Barrier Rectifier (SBR®) optimized for high-efficiency DC-DC converters and automotive charging circuits. It delivers a maximum forward voltage of 0.55 V at 1 A, reverse leakage ≤100 µA at 40 V, and operates up to +150°C junction temperature. Its SOD323 package supports space-constrained mobile power designs.
For engineers reviewing the SBR1A40S3Q-7 datasheet, SBR1A40S3Q-7 pinout, SBR1A40S3Q-7 application, or SBR1A40S3Q-7 equivalent, key selection criteria include low VF stability across temperature, soft-switching behavior for EMI reduction, AEC-Q101 qualification for automotive use, and thermal resistance (RθJA = 300°C/W on polyimide PCB) in compact SOD323 footprint.
Technical Context
The SBR1A40S3Q-7 employs patented Super Barrier Rectifier technology to achieve lower forward voltage than Schottky diodes while maintaining superior reverse leakage control. Its 19 ns reverse recovery time (tRR) and 55 pF junction capacitance (CJ) enable fast, low-loss switching in high-frequency buck and boost topologies.
Rated for 40 V peak repetitive reverse voltage (VRRM) and 1 A average rectified output current (IO) at TC = +65°C, it sustains 20 A non-repetitive surge current (IFSM) and exhibits stable performance from –65°C to +150°C, validated under IATF16949 manufacturing controls.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum blocking voltage before breakdown; ensures safe operation in 24V automotive and 36V industrial DC-DC inputs. |
| VF Max | 0.55 V @ 1 A, 25°C - Reduces conduction loss by ~25% vs. standard Schottkys; critical for >90% efficiency at light-to-moderate loads. |
| IR Max | 100 µA @ 40 V, 25°C - Enables low standby power in always-on charging circuits without thermal runaway risk. |
| tRR | 19 ns - Soft, fast recovery minimizes switching noise and voltage spikes in synchronous rectifier layouts. |
| RθJA | 300 °C/W (polyimide PCB) - Supports 1 A continuous current with <30°C rise above ambient in thermally constrained modules. |
| TJ Range | –65°C to +150°C - Validated for under-hood automotive environments and industrial motor drive heatsink proximity. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive discrete rectifiers, including HTGB, HTRB, and TCT. |
Pinout & Package
Package: SOD323 - ultra-compact surface-mount plastic case (1.30 × 1.70 × 0.95 mm), UL 94V-0 rated, matte tin–annealed terminals, cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point | Connected to source/switch node in buck converter; requires low-inductance layout to minimize ringing during turn-off. |
| Cathode | Output current exit point | Marked with band; ties to output capacitor and load; must be routed with minimal trace length to reduce EMI coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Patented SBR® Technology | Combines Schottky-like VF with PN-junction-level IR control-enables high efficiency without sacrificing leakage-limited standby performance. |
| +150°C Operating Junction Temperature | Enables placement near MOSFETs or inductor hotspots without derating; eliminates need for thermal relief pads in dense power modules. |
| Soft, Fast Switching | 19 ns tRR with controlled di/dt slope reduces EMI generation and snubber component count in 500 kHz–2 MHz converters. |
| AEC-Q101 Qualified & PPAP Capable | Validated for automotive power systems requiring change control, lot traceability, and zero-defect manufacturing per IATF16949. |
Applications
| DC-DC Converters | Automotive Charging Circuits |
|---|---|
Use Scenario: Secondary-side rectification in 500 kHz–1.5 MHz isolated flyback or active clamp forward converters powering infotainment ECUs. IC Role / Device Role / Timing Role: Synchronous rectifier replacement; conducts during low-side switch ON phase with minimal conduction loss and no gate drive complexity. Use Value: Achieves 0.55 V VF at 1 A to cut rectifier loss by ≥30% vs. 0.8 V Schottky, directly improving system efficiency and reducing heatsink size. |
Use Scenario: USB-C PD input protection and voltage clamping in vehicle-mounted fast chargers handling 12–24 V battery transients. IC Role / Device Role / Timing Role: Input polarity protection and reverse-blocking element; withstands load dump pulses up to 40 V with <100 µA leakage at 85°C. Use Value: Eliminates need for external TVS + series diode stack; simplifies BOM while meeting ISO 7637-2 Pulse 5a immunity requirements. |
| Mobile Telecom Power Supplies | Motor Control Freewheeling |
Use Scenario: Output rectification in portable base station RF amplifier DC-DC modules operating at ambient up to 70°C. IC Role / Device Role / Timing Role: High-frequency freewheeling path during PWM dead-time; handles 1 A average + 20 A surge peaks without thermal runaway. Use Value: Stable 0.55 V VF across –40°C to +125°C enables consistent efficiency over full environmental range-no dynamic compensation required. |
Use Scenario: Freewheeling diode across brushed DC motor windings in automotive HVAC actuators and seat positioners. IC Role / Device Role / Timing Role: Clamps inductive kickback during MOSFET turn-off; recovers within 19 ns to prevent cross-conduction in half-bridge drivers. Use Value: Soft recovery limits voltage overshoot to <45 V during 10 A/ms dI/dt events-reducing gate driver stress and eliminating snubber capacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super barrier rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBRT1A40S3Q-7 | Same SOD323 package and 40 V/1 A rating, but uses enhanced SBR2® process yielding 0.52 V VF (typ) and 50 µA IR (max) at 25°C. | Better suited for ultra-low-power IoT battery management where sub-50 µA leakage is mandatory at elevated temperature. | Select when VF reduction <0.03 V and IR halving justify potential cost premium and longer lead time. |
| RB050M-30 | 1 A/30 V Schottky diode in SOD323; VF = 0.45 V (typ), but IR = 200 µA @ 30 V and TJ max = +125°C only. | Limited to non-automotive, commercial-grade 12 V systems; fails AEC-Q101 and exceeds leakage budget in 85°C charging circuits. | Acceptable only for cost-sensitive consumer DC-DC where 30 V rating and 125°C limit are sufficient and leakage <200 µA is tolerable. |
Compared with SBRT1A40S3Q-7, the SBR1A40S3Q-7 trades minor VF increase for broader automotive qualification and proven production availability; versus RB050M-30, it delivers higher voltage margin, tighter leakage, and full AEC-Q101 compliance-making it the robust default for automotive and industrial 24V+ systems.
Availability
SBR1A40S3Q-7 is available at Aetrix Electronics and suitable for DC-DC converters, automotive charging circuits, and motor control freewheeling applications requiring stable component supply, AEC-Q101 traceability, and high-temperature reliability.
Supply support for SBR1A40S3Q-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-performance power management, signal integrity, and protection solutions for automotive, industrial, and computing markets.
The SBR® Super Barrier Rectifier product line targets high-efficiency, high-reliability power conversion where Schottky limitations (leakage, temperature drift) and PN diode losses (VF) must both be overcome-especially in automotive and telecom infrastructure.
FAQ
Is SBR1A40S3Q-7 suitable for synchronous rectification in 1 MHz DC-DC converters?
Yes. With 19 ns reverse recovery time and soft-switching behavior, it performs reliably in 500 kHz–2 MHz buck/boost converters. Its 55 pF junction capacitance and low stored charge minimize switching loss and EMI, enabling clean waveforms without added snubbers-confirmed in Diodes' AN-7001 application note for high-frequency SMPS.
What is the maximum continuous current at +100°C ambient?
At TA = +100°C, derating curves show IO drops to approximately 0.65 A (Fig. 4). This is based on RθJA = 300°C/W and TJ(max) = +150°C: ΔT = 50°C → Pdiss = 50 / 300 ≈ 0.167 W; using VF ≈ 0.58 V at 100°C yields IF ≈ 0.167 / 0.58 ≈ 0.65 A. Always verify with actual board thermal design.
Does SBR1A40S3Q-7 require special PCB layout considerations?
Yes. Use the recommended SOD323 pad layout (X = 0.59 mm, X1 = 2.70 mm, Y = 0.45 mm) from Diodes' package outline document. Minimize anode/cathode trace lengths, avoid thermal reliefs on pads, and ensure ≥0.2 mm solder mask dams to prevent bridging-critical for reliable reflow in high-volume automotive assembly.
How does its AEC-Q101 qualification differ from standard industrial grade?
AEC-Q101 qualification includes accelerated stress tests (HTGB, HTRB, TCT, UHAST) performed on full production lots, plus PPAP documentation, IATF16949 manufacturing evidence, and change control protocols. Unlike industrial parts, it guarantees zero defects in automotive safety-critical power paths and supports long-term supply continuity under automotive OEM requirements.
SBR1A40S3Q-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Super Barrier
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 40 V
- Capacitance @ Vr, F:
- 55pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
- Operating Temperature - Junction:
- -65°C ~ 150°C
SBR1A40S3Q-7 FAQ
1.How can I place an order for SBR1A40S3Q-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SBR1A40S3Q-7 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 SBR1A40S3Q-7 reliable?
The price and inventory of SBR1A40S3Q-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBR1A40S3Q-7 is usually 5 days.
3.What payment methods are accepted for SBR1A40S3Q-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBR1A40S3Q-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBR1A40S3Q-7?
SBR1A40S3Q-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBR1A40S3Q-7 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 SBR1A40S3Q-7?
For technical support, including SBR1A40S3Q-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBR1A40S3Q-7 requirements.
6.How does Aetrix verify that SBR1A40S3Q-7 is sourced from the original manufacturer or authorized distributors?
All SBR1A40S3Q-7 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 SBR1A40S3Q-7 meets industry standards.
7.What is the process for return or replacement of SBR1A40S3Q-7?
All SBR1A40S3Q-7 units undergo pre-shipment inspection (PSI). If there is an issue with SBR1A40S3Q-7, 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 SBR1A40S3Q-7 part is unused and in its original packaging.
Return procedure for SBR1A40S3Q-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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