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Diodes Incorporated B370Q-13-F
- Part No.:
- B370Q-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
B370Q-13-F.pdf
- Description:
- DIODE SCHOTTKY 70V 3A SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,762
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Product details
Overview
B370Q-13-F from Diodes Incorporated is a 70 V, 3.0 A high-voltage Schottky barrier rectifier in SMC package, featuring 0.79 V max forward voltage at 3.0 A and 0.5 mA max reverse leakage at rated VR, designed for polarity protection and freewheeling in low-voltage DC/DC converters and automotive power supplies.
For engineers reviewing the B370Q-13-F datasheet, B370Q-13-F pinout, B370Q-13-F application, or B370Q-13-F equivalent, key selection criteria include peak repetitive reverse voltage (70 V), average rectified current (3.0 A), thermal resistance junction-to-case (24 °C/W), surge rating (100 A), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Schottky rectifier uses guard ring die construction to enhance transient immunity and suppress avalanche-induced failure during inductive switching events. Its low VF (0.79 V max @ 3.0 A) and low CT (100 pF @ 4 V) support high-frequency operation up to several MHz in synchronous rectification and flyback snubber circuits.
Rated for -55°C to +150°C operating temperature and qualified to AEC-Q101, it delivers stable performance under automotive thermal cycling and humidity exposure. The SMC package provides 24 °C/W junction-to-case thermal resistance, enabling 3.0 A continuous conduction with minimal heatsinking in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 70 V - Maximum repetitive reverse blocking voltage; defines safe DC or peak AC reverse bias limit before breakdown |
| IO | 3.0 A - Average rectified forward current at TT = +90°C; sets continuous power handling capability |
| VF max | 0.79 V @ 3.0 A, 25°C - Forward voltage drop limiting conduction loss and self-heating in high-efficiency designs |
| IR max | 0.5 mA @ 70 V, 25°C - Reverse leakage current defining off-state power loss and signal integrity in high-impedance nodes |
| IFSM | 100 A @ 8.3 ms - Non-repetitive surge rating supporting inrush and fault-current tolerance in power-up and short-circuit events |
| RθJC | 24 °C/W - Junction-to-case thermal resistance enabling direct thermal path to heatsink or copper pour for thermal management |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic with matte tin-plated terminals, cathode band marking, moisture sensitivity level 1 per J-STD-020, weight ≈ 0.21 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry node | Connected to input/source side of rectification path; accepts up to 3.0 A DC or pulsed forward current |
| Cathode | Forward current exit node / reverse voltage reference | Connected to output/load side; marked by band; carries full load current and defines reverse blocking reference plane |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves ESD and surge robustness by controlling edge field distribution, reducing risk of localized avalanche during transients |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and mechanical shock per IATF 16949 manufacturing controls |
| Lead-free, halogen- and antimony-free "Green" compound | Complies with RoHS 3 (2015/863/EU); <900 ppm Br, <900 ppm Cl, <1000 ppm Sb; UL 94V-0 flammability rating |
| Low thermal resistance (RθJC = 24 °C/W) | Enables efficient heat transfer to PCB copper or external heatsink, supporting 3.0 A operation without forced air cooling |
Applications
| Automotive Body Control Module (BCM) | Industrial DC/DC Converter Output Stage |
|---|---|
Use Scenario: Reverse-polarity protection on 12 V battery input rail of BCM microcontroller power supply. IC Role / Device Role / Timing Role: Unidirectional current gate preventing damage during incorrect battery connection; operates in steady-state conduction with minimal voltage drop. Use Value: 0.79 V VF ensures >93% efficiency at 3.0 A, preserving system voltage margin while meeting AEC-Q101 reliability requirements. | Use Scenario: Freewheeling diode in synchronous buck converter output stage for factory automation PLC power module. IC Role / Device Role / Timing Role: Provides low-loss current path during high-side MOSFET off-time; handles 3.0 A average current with fast recovery. Use Value: 100 pF capacitance and Schottky architecture minimize switching losses and EMI generation at 500 kHz–1 MHz switching frequencies. |
| USB-C Power Delivery Adapter | Telecom PoE Midspan Injector |
Use Scenario: Polarity protection diode on secondary-side 20 V output of GaN-based USB-C PD adapter. IC Role / Device Role / Timing Role: Blocks reverse current when upstream source is disconnected; conducts only during normal forward operation. Use Value: 0.5 mA IR at 20 V ensures negligible standby loss, critical for meeting Level VI efficiency standards. | Use Scenario: Output rectifier in isolated DC-DC stage supplying 48 V to PoE-powered devices. IC Role / Device Role / Timing Role: Rectifies transformer secondary output; sustains 3.0 A continuous current under sustained load conditions. Use Value: 100 A IFSM rating supports hot-swap surges and cable discharge events without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB370-E3/54 (Vishay) | Same 70 V VRRM and 3.0 A IO, but VF = 0.85 V max @ 3.0 A; RθJC = 28 °C/W; no AEC-Q101 qualification | Not approved for automotive systems requiring PPAP or change control; suitable for industrial/commercial only | Select if cost-sensitive and automotive qualification is unnecessary; verify thermal margin due to higher VF and RθJC |
| SS370H (ON Semiconductor) | 70 V VRRM, 3.0 A IO, VF = 0.75 V typ @ 3.0 A; AEC-Q101 qualified; RθJC = 22 °C/W; SMC package | Lower typical VF improves light-load efficiency; tighter thermal resistance enables higher ambient operation | Prefer for new automotive designs where 0.04 V lower VF and 2 °C/W better RθJC provide measurable thermal headroom |
Compared with SB370-E3/54, B370Q-13-F offers AEC-Q101 compliance and lower VF max; versus SS370H, it trades 0.04 V higher VF max for broader distributor availability and identical packaging compatibility-both critical for production continuity in Tier-1 supply chains.
Availability
B370Q-13-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC/DC converters, USB-C power adapters, and PoE midspan injectors requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for B370Q-13-F 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-reliability power management, signal integrity, and protection solutions for automotive, industrial, and consumer markets.
The B370Q-13-F belongs to Diodes' high-voltage Schottky rectifier product line, engineered specifically for automotive-grade polarity protection and freewheeling applications where low VF, surge robustness, and AEC-Q101 compliance are mandatory design requirements.
FAQ
What is the maximum junction temperature for continuous operation of B370Q-13-F?
The B370Q-13-F has an operating junction temperature range of -55°C to +150°C. For continuous 3.0 A operation, case temperature must be maintained ≤ +90°C per the derating curve in DS38667 Rev. 4-2, Figure 4. At +90°C case, junction temperature reaches ~114°C assuming RθJC = 24 °C/W, remaining within safe limits.
Is B370Q-13-F compatible with lead-free reflow soldering processes?
Yes. B370Q-13-F features matte tin-plated terminals and is rated for lead-free reflow per JEDEC J-STD-020, with moisture sensitivity level 1. It withstands peak temperatures up to 260°C for 30 seconds and is fully compatible with standard Pb-free SAC305 profiles without delamination or plating degradation.
Does B370Q-13-F require a heatsink for 3.0 A DC operation?
No external heatsink is required if PCB layout provides ≥ 1 in² (6.45 cm²) of 2 oz copper connected to both terminals. With RθJC = 24 °C/W and RθCA ≈ 38 °C/W on FR-4 (per datasheet Note 5), junction rise is ~186°C at 3.0 A - exceeding limit. Therefore, thermal pad design per Diodes' recommended footprint (C = 6.90 mm, G = 4.40 mm) is mandatory to achieve safe operation.
How does the guard ring structure improve reliability in automotive applications?
The guard ring die construction distributes electric field stress away from the active junction periphery, suppressing premature edge breakdown during load dump transients (ISO 7637-2 Pulse 5a). This extends device lifetime under repeated 100 A surge events and improves robustness against ESD (IEC 61000-4-2) in unshielded vehicle harness environments.
B370Q-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 70 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 790 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 70 V
- Capacitance @ Vr, F:
- 100pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
- Operating Temperature - Junction:
- -55°C ~ 125°C
B370Q-13-F FAQ
1.How can I place an order for B370Q-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for B370Q-13-F 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 B370Q-13-F reliable?
The price and inventory of B370Q-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B370Q-13-F is usually 5 days.
3.What payment methods are accepted for B370Q-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B370Q-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B370Q-13-F?
B370Q-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B370Q-13-F 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 B370Q-13-F?
For technical support, including B370Q-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B370Q-13-F requirements.
6.How does Aetrix verify that B370Q-13-F is sourced from the original manufacturer or authorized distributors?
All B370Q-13-F 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 B370Q-13-F meets industry standards.
7.What is the process for return or replacement of B370Q-13-F?
All B370Q-13-F units undergo pre-shipment inspection (PSI). If there is an issue with B370Q-13-F, 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 B370Q-13-F part is unused and in its original packaging.
Return procedure for B370Q-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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