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Diodes Incorporated B370-13
- Part No.:
- B370-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
B370-13.pdf
- Description:
- DIODE SCHOTTKY 70V 3A SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,433
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Product details
Overview
B370-13 from Diodes Incorporated is a 3.0A, 70V peak repetitive reverse voltage Schottky barrier rectifier in SMC package, featuring low forward voltage drop (0.79 V at 3.0A, 25°C), 100A non-repetitive surge capability, and guard ring die construction for transient protection-used in low-voltage, high-frequency inverters and polarity protection circuits.
For engineers reviewing the B370-13 datasheet, B370-13 pinout, B370-13 application, or B370-13 equivalent, key selection criteria include forward voltage at rated current, thermal resistance (10°C/W junction-to-terminal), reverse leakage (0.5 mA @ 70V, 25°C), surge rating, and RoHS-compliant lead-free plating.
Technical Context
This Schottky rectifier employs guard ring die construction to enhance transient voltage immunity and reduce avalanche-induced failure risk. Its low VF enables high-efficiency operation in DC-DC output stages and freewheeling paths where conduction loss minimization is critical.
Designed for operation up to +125°C junction temperature, it uses a molded plastic SMC case with UL 94V-0 flammability rating and moisture sensitivity level 1. Cathode identification is via band or notch; terminals are matte tin-plated for MIL-STD-202 solderability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 70 V - Maximum peak reverse voltage before breakdown; sets safe operating limit in 48V bus polarity protection |
| IO @ TT=90°C | 3.0 A - Continuous average forward current derated to terminal temperature; defines usable DC load capacity |
| VF @ 3.0A, 25°C | 0.79 V - Forward voltage drop at full rated current; directly determines conduction loss (2.37 W) in linear operation |
| IFSM (8.3ms) | 100 A - Non-repetitive surge rating; supports motor startup or capacitor-charging transients without failure |
| RθJT | 10 °C/W - Junction-to-terminal thermal resistance; enables direct heatsinking via PCB copper or metal-core substrate |
| IR @ 70V, 25°C | 0.5 mA - Reverse leakage current; impacts standby power in battery-backed systems and high-impedance bias networks |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with cathode band marking; dimensions: 7.75–8.13 mm length × 5.59–6.22 mm width × 2.75–3.18 mm height; weight ≈ 0.21 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or negative rail) in reverse polarity protection |
| Cathode | Forward current exit point | Marked with band/notch; ties to positive input in freewheeling diode configuration |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves ESD and surge immunity by controlling edge breakdown; validated per IEC 61000-4-5 surge testing |
| Lead-free / RoHS compliant finish | Matte tin plating meets EU Directive 2002/95/EC exemptions; compatible with Pb-free reflow profiles (J-STD-020) |
| Green molding compound | Halogen- and antimony-free encapsulant (introduced 2009+); satisfies IPC-4101D halogen limits |
| 100A surge rating | Withstands single half-sine 8.3ms surges common in AC line rectification and inductive load switching |
Applications
| Solar Microinverter DC-DC Stage | Industrial PLC Power Input Protection |
|---|---|
Use Scenario: Used in synchronous rectification of isolated flyback secondary side in solar microinverters operating at 20–100 kHz. IC Role / Device Role / Timing Role: Schottky rectifier replacing conventional diode to reduce conduction loss and improve efficiency above 94%. Use Value: 0.79 V VF at 3A lowers power dissipation by ~0.4 W vs. Si diode, reducing heatsink requirement in sealed enclosures. | Use Scenario: Installed across 24V DC input terminals of programmable logic controllers to prevent damage from reverse battery connection. IC Role / Device Role / Timing Role: Polarity protection diode conducting only during correct insertion; blocks reverse current flow. Use Value: 70V VRRM provides 2× margin over 24V nominal rail; 100A IFSM handles accidental short-circuit events. |
| Server PSU ORing Circuit | Automotive Body Control Module |
Use Scenario: Employed in N+1 redundant 12V server power supply ORing configuration to isolate failed units. IC Role / Device Role / Timing Role: Low-VF Schottky enabling minimal forward drop while supporting hot-swap sequencing. Use Value: 0.79 V VF ensures <1% voltage loss at 3A load, preserving tight 12V ±5% regulation under dynamic load steps. | Use Scenario: Integrated into 12V input stage of body control module for reverse-battery and load-dump protection. IC Role / Device Role / Timing Role: Freewheeling path for relay coils and solenoid drivers during turn-off. Use Value: 10°C/W RθJT allows direct mounting on thick copper pour, sustaining 3A continuous current at 105°C ambient. |
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-3EYH07-M3/45 | Same 70V VRRM, 3A IO, but TO-277 package (lower RθJA); VF = 0.75 V @ 3A | TO-277 offers better board-level thermal performance but requires different footprint | Select when PCB layout allows TO-277 and lower VF is prioritized over SMC compatibility |
| ON Semiconductor SB370-E3/54 | Identical SMC package, same 70V/3A rating, VF = 0.82 V @ 3A; higher IR (1.0 mA @ 70V) | No guard ring; reduced transient robustness in noisy industrial environments | Acceptable for cost-sensitive consumer designs where surge immunity is not critical |
Compared with VS-3EYH07-M3/45 and SB370-E3/54, B370-13 uniquely combines SMC footprint compatibility, guard ring protection, and industry-leading 0.79 V VF at 3A-making it optimal for space-constrained, high-reliability 24–48V industrial power interfaces.
Availability
B370-13 is available at Aetrix Electronics and suitable for solar microinverters, industrial PLCs, server ORing circuits, and automotive body control modules requiring stable component supply and long-term manufacturability.
Supply support for B370-13 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, serving industrial, computing, communications, and consumer markets since 1959.
The B370-13 belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in 24–48V systems where low VF, surge tolerance, and RoHS compliance are mandatory.
FAQ
What is the maximum junction temperature for continuous operation of B370-13?
The B370-13 has a specified operating junction temperature range of –55°C to +125°C. For continuous DC operation at 3.0A, thermal design must ensure TJ does not exceed +125°C-achievable with ≤10°C/W total thermal resistance from junction to ambient, assuming 25°C ambient and 10°C/W RθJT.
Does B370-13 have a qualified AEC-Q101 rating for automotive use?
No, B370-13 is not AEC-Q101 qualified. It is rated for industrial temperature range (–55°C to +125°C) and meets RoHS and green compound requirements, but lacks the stress-test validation required for automotive-grade qualification. Use in automotive applications requires customer-level reliability assessment.
Can B370-13 be used in parallel to increase current handling?
Parallel operation is not recommended without external balancing-B370-13 exhibits typical VF variation of ±50 mV at 3A, leading to current imbalance. Derating to ≤2.0A per device and using matched lots with VF binning is required for reliable paralleling; consult Diodes' Application Note AN-4001 for implementation guidance.
What is the meaning of the "-13" suffix in B370-13?
The "-13" suffix denotes tape-and-reel packaging: 3000 pieces per reel in SMC-compatible carrier tape, per Diodes' ordering nomenclature. It does not indicate revision, temperature grade, or plating variant-the base device characteristics remain identical to B370.
B370-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
- Operating Temperature - Junction:
- -55°C ~ 125°C
B370-13 FAQ
1.How can I place an order for B370-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for B370-13 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 B370-13 reliable?
The price and inventory of B370-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B370-13 is usually 5 days.
3.What payment methods are accepted for B370-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B370-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B370-13?
B370-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B370-13 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 B370-13?
For technical support, including B370-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B370-13 requirements.
6.How does Aetrix verify that B370-13 is sourced from the original manufacturer or authorized distributors?
All B370-13 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 B370-13 meets industry standards.
7.What is the process for return or replacement of B370-13?
All B370-13 units undergo pre-shipment inspection (PSI). If there is an issue with B370-13, 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 B370-13 part is unused and in its original packaging.
Return procedure for B370-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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