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Diodes Incorporated B250Q-13
- Part No.:
- B250Q-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
B250Q-13.pdf
- Description:
- DIODE SCHOTTKY 50V 2A SMB TR 3K
- Quantity:
- Payment:
- Shipping:
Inventory:1,921
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Product details
Overview
B250Q-13 from Diodes Incorporated is an automotive-grade 50 V, 2.0 A surface-mount Schottky barrier rectifier in SMB package, featuring 0.70 V forward voltage at 2.0 A, 50 A non-repetitive surge rating, and AEC-Q101 qualification for high-reliability power conversion in engine control units and ADAS power rails.
For engineers reviewing the B250Q-13 datasheet, B250Q-13 pinout, B250Q-13 application, or B250Q-13 equivalent, key selection criteria include its low VF for efficiency-critical 12 V/24 V DC-DC stages, SMB thermal resistance of 20 °C/W, RoHS-compliant matte tin plating, and polarity-marked cathode band for automated assembly verification.
Technical Context
This Schottky rectifier uses guard ring die construction to suppress transient-induced avalanche failure and supports high-frequency switching up to several hundred kHz in flyback and buck-derived topologies. Its low junction-to-lead thermal resistance (20 °C/W) enables direct PCB copper pour heat sinking without heatsinks in ambient temperatures up to +125°C.
The device operates with a maximum reverse leakage of 20 mA at rated 50 V and 100°C, and exhibits 200 pF total capacitance at 40 V reverse bias-critical for EMI filtering design in automotive power supplies where fast di/dt transients occur.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in 24 V automotive systems with load dump transients. |
| IO | 2.0 A - Average rectified output current at TA = +25°C; derates to ~1.2 A at +100°C per Fig. 4. |
| VF | 0.70 V @ 2.0 A - Forward voltage drop directly determines conduction loss (1.4 W at full load), critical for thermal management. |
| IFSM | 50 A - Non-repetitive peak surge current for 8.3 ms half-sine; withstands cold-crank and jump-start surges. |
| IR | 20 mA @ 50 V, +100°C - Reverse leakage sets standby power loss in always-on modules like telematics. |
| RθJL | 20 °C/W - Junction-to-lead thermal resistance; enables direct thermal coupling to PCB copper for passive cooling. |
| CT | 200 pF @ 40 V, 1 MHz - Capacitance impacts high-frequency noise coupling and snubber design in SMPS. |
Pinout & Package
Package: SMB (Surface Mount Body), molded plastic case per UL 94V-0, with matte tin-plated terminals solderable per MIL-STD-202 Method 208. Cathode identified by band on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point during forward conduction | Connected to unregulated input rail (e.g., battery or boost output); must handle full IO and IFSM. |
| Cathode | Output current exit point during forward conduction | Connected to regulated output node or freewheeling path; marked with visible band for orientation verification. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Suppresses edge avalanche during voltage transients, improving robustness against ISO 7637-2 pulse 5a load dump events. |
| AEC-Q101 qualification | Validated for automotive underhood environments including temperature cycling (-40°C to +150°C) and mechanical shock. |
| Lead-free & halogen-free | Meets EU RoHS 2 and JESD201A Class 2A requirements; eliminates brominated flame retardants (<900 ppm Br). |
| High-temp solder compatibility | Rated for 260°C/10 s reflow, compatible with standard lead-free PCB assembly processes without delamination. |
Applications
| Engine Control Unit Power Supply | ADAS Camera Module DC-DC Stage |
|---|---|
Use Scenario: Converts 12 V battery to 5 V/3.3 V for microcontroller and sensor rails in ECU mainboard. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck converter's low-side path and polarity protection at input connector. Use Value: 0.70 V VF minimizes conduction loss at 2 A load, reducing thermal stress on 2-layer PCB without heatsink. | Use Scenario: Provides reverse-polarity protection and flyback path in 24 V–5 V buck converter powering CMOS image sensor and ISP. IC Role / Device Role / Timing Role: Polarity protection diode and freewheeling element in high-frequency (500 kHz) buck regulator. Use Value: 200 pF CT limits high-frequency ringing during switch-node transitions, easing EMI filter design. |
| Body Control Module Load Dump Clamp | Electric Power Steering Motor Driver Protection |
Use Scenario: Clamps induced transients during alternator load dump in BCM power input stage. IC Role / Device Role / Timing Role: Transient suppression diode placed across input capacitor bank, conducting only during overvoltage events. Use Value: 50 A IFSM rating absorbs 100 ms, 120 V pulses per ISO 7637-2 without degradation. | Use Scenario: Freewheeling path for H-bridge motor driver FETs during PWM dead-time in EPS actuator control. IC Role / Device Role / Timing Role: Low-VF Schottky enabling fast recovery and minimal voltage overshoot during inductive kickback. Use Value: 20 °C/W RθJL allows direct mounting to copper pour, maintaining <125°C junction temp at 2 A continuous. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB550-E3/54 (Vishay) | Same 50 V VRRM, 2.0 A IO, but SMA package (RθJL = 25 °C/W); VF = 0.72 V @ 2 A. | Larger thermal resistance requires larger copper area; not AEC-Q101 qualified. | Select only for non-automotive industrial use where qualification is not required. |
| SS25HE3/52T (Vishay) | 50 V VRRM, 2.0 A IO, SMB package, AEC-Q101 qualified; VF = 0.75 V @ 2 A; IR = 15 mA @ 100°C. | Slightly higher VF increases conduction loss by ~0.1 W; lower IR reduces standby leakage. | Prefer when lower leakage dominates over minimal VF penalty in always-on modules. |
Compared with SB550-E3/54 and SS25HE3/52T, B250Q-13 offers optimal balance of automotive qualification, SMB thermal performance, and lowest VF in its class-making it preferred for space-constrained, thermally demanding engine bay applications.
Availability
B250Q-13 is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, body control modules, and electric power steering systems requiring stable component supply with automotive-grade traceability and long-term lifecycle support.
Supply support for B250Q-13 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The B250Q-13 belongs to Diodes' automotive-qualified Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in harsh-temperature vehicle subsystems.
FAQ
What is the maximum junction temperature for continuous operation?
The B250Q-13 has an operating junction temperature range of -65°C to +150°C. For continuous 2.0 A operation at ambient temperatures above +85°C, thermal derating per Figure 4 applies-requiring PCB copper area ≥ 100 mm² per pad to maintain TJ ≤ 150°C with RθJL = 20 °C/W.
Is the cathode marking visible on both sides of the SMB package?
Yes-the cathode is marked by a distinct band on the top surface of the SMB package. The bottom side is unmarked, but the band aligns with the cathode terminal (pin 2) in standard SMB orientation per JEDEC MO-178, verified in Diodes' AP02002 package drawing.
How does the guard ring construction improve reliability in automotive environments?
The guard ring structure prevents premature edge breakdown during voltage transients such as ISO 7637-2 pulse 5a (load dump). It redistributes electric field stress away from the silicon periphery, increasing the device's ability to sustain 120 V transients without avalanche-induced parametric shift or failure.
Can B250Q-13 replace B250A-13 in existing designs?
Yes-B250Q-13 shares identical electrical specifications and SMB package dimensions with B250A-13, differing only in AEC-Q101 qualification, PPAP capability, and automotive-specific test screening. No layout or thermal redesign is needed for drop-in replacement in automotive programs.
B250Q-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 700 mV @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 50 V
- Capacitance @ Vr, F:
- 200pF @ 40V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
- Operating Temperature - Junction:
- -65°C ~ 150°C
B250Q-13 FAQ
1.How can I place an order for B250Q-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for B250Q-13 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 B250Q-13 reliable?
The price and inventory of B250Q-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B250Q-13 is usually 5 days.
3.What payment methods are accepted for B250Q-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B250Q-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B250Q-13?
B250Q-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B250Q-13 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 B250Q-13?
For technical support, including B250Q-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B250Q-13 requirements.
6.How does Aetrix verify that B250Q-13 is sourced from the original manufacturer or authorized distributors?
All B250Q-13 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 B250Q-13 meets industry standards.
7.What is the process for return or replacement of B250Q-13?
All B250Q-13 units undergo pre-shipment inspection (PSI). If there is an issue with B250Q-13, 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 B250Q-13 part is unused and in its original packaging.
Return procedure for B250Q-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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