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Diodes Incorporated SB370-T
- Part No.:
- SB370-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SB370-T.pdf
- Description:
- DIODE SCHOTTKY 70V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:5,169
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Product details
Overview
SB370-T from Diodes Incorporated is a 3.0A, 70V Schottky barrier rectifier in DO-201AD package, featuring low forward voltage drop (0.75V @ 3.0A), high surge capability (80A peak), and guard ring die construction for transient protection. It is used in low-voltage, high-frequency inverters, freewheeling diode circuits, and polarity protection in DC power supplies.
For engineers reviewing the SB370-T datasheet, SB370-T pinout, SB370-T application, or SB370-T equivalent, key selection criteria include its 70V VRRM rating, 3.0A average forward current at TL = +80°C, thermal resistance of 20 K/W, and RoHS-compliant tin-plated terminals suitable for automotive-grade designs requiring AEC-Q101 alignment.
Technical Context
This Schottky rectifier employs a planar guard ring die structure to enhance transient voltage immunity and reduce leakage under reverse bias. Its low junction capacitance (250 pF @ 4V) and fast switching behavior support high-frequency operation up to several hundred kHz without significant switching loss.
The device operates across –65°C to +150°C junction temperature range and exhibits stable reverse current (0.5 mA @ 25°C, 20 mA @ 100°C) with minimal derating-enabling reliable use in thermally constrained industrial and automotive environments where thermal management is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 70 V - Maximum repetitive reverse voltage before breakdown; sets upper limit for DC blocking in 48V systems. |
| IO @ TL=80°C | 3.0 A - Continuous average forward current at 80°C lead temperature; defines usable load current in compact PCB layouts. |
| VFM @ IF=3.0A | 0.75 V - Forward voltage drop at rated current; directly determines conduction loss (2.25W max at 3A). |
| IFSM (8.3ms) | 80 A - Non-repetitive surge current rating; supports motor startup or capacitor-charging transients. |
| RθJA | 20 K/W - Junction-to-ambient thermal resistance; enables estimation of junction temperature rise under natural convection. |
| CJ @ 4V, 1MHz | 250 pF - Junction capacitance; impacts high-frequency switching noise and EMI filter design. |
Pinout & Package
DO-201AD molded plastic package with axial leads, cathode band marking polarity, UL 94V-0 flammability rating, and 1.1 g typical weight. Tin-plated terminals meet MIL-STD-202 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to lower-potential side (e.g., ground or return path) in freewheeling or reverse polarity protection. |
| Cathode (Lead 2, banded end) | Forward current exit / reverse blocking terminal | Connected to positive rail; cathode band visually identifies polarity during manual placement or inspection. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves transient voltage immunity and reduces leakage current drift under ESD or load dump conditions. |
| Low forward voltage (0.75V @ 3A) | Reduces conduction losses by ~30% vs. comparable silicon rectifiers, improving efficiency in 12–48V DC/DC stages. |
| High surge rating (80A peak) | Withstands inrush currents in battery-powered tools and UPS systems without degradation. |
| RoHS-compliant tin finish | Enables lead-free reflow assembly and meets EU Directive 2015/863/EU without exemption dependencies. |
Applications
| DC Power Supply Polarity Protection | Automotive Body Control Module (BCM) Freewheeling |
|---|---|
Use Scenario: Prevents damage from reverse battery connection in 12V/24V vehicle accessory modules. IC Role / Device Role / Timing Role: Unidirectional current gate placed in series with input power rail. Use Value: Enables fail-safe operation with <0.75V dropout at full load, minimizing voltage headroom loss. | Use Scenario: Suppresses inductive kickback from solenoid drivers (e.g., door lock actuators) in BCMs. IC Role / Device Role / Timing Role: Freewheeling diode across inductive load to clamp flyback voltage. Use Value: 80A surge rating handles repeated 50–100ms coil de-energization events without thermal runaway. |
| Industrial DC-DC Converter Output Rectification | Solar Charge Controller Reverse Current Blocking |
Use Scenario: Secondary-side rectification in isolated 48V-to-12V flyback converters for factory automation I/O modules. IC Role / Device Role / Timing Role: High-frequency synchronous rectifier replacement in cost-sensitive designs. Use Value: 250 pF junction capacitance minimizes switching node ringing and EMI generation at 100–300 kHz switching frequencies. | Use Scenario: Blocks reverse current flow from battery to PV panel at night in off-grid solar systems. IC Role / Device Role / Timing Role: Blocking diode in series with battery charging path. Use Value: 0.5 mA reverse leakage at 25°C preserves battery charge over extended dark periods without active control. |
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 DO-201AD package, identical 70V VRRM and 3.0A IO, but higher VFM (0.78V @ 3A) and slightly higher IR (1.0 mA @ 25°C). | Acceptable in non-critical efficiency designs; less suitable for thermally constrained 48V telecom PSUs. | Select when second-source qualification is required and minor VFM/IR trade-off is acceptable. |
| SS37 (ON Semiconductor) | DO-201AD, 70V VRRM, 3.0A IO, but lower IFSM (60A) and higher RθJA (25 K/W). | Not recommended for high-surge automotive loads; requires additional heatsinking in >2A continuous operation. | Prefer for cost-sensitive consumer power adapters where surge margin and thermal density are secondary. |
Compared with SB370-E3/54 and SS37, SB370-T offers the lowest combination of forward voltage (0.75V), surge rating (80A), and thermal resistance (20 K/W), making it optimal for space-constrained, high-reliability 12–48V industrial and automotive rectification where efficiency and transient robustness are co-prioritized.
Availability
SB370-T is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC-DC converters, and solar charge controllers requiring stable component supply and long-term production continuity.
Supply support for SB370-T 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 SBx70 series belongs to Diodes' general-purpose Schottky rectifier product line, engineered for high-efficiency, low-loss power conversion in cost-sensitive and thermally demanding applications from consumer to automotive.
FAQ
What is the maximum junction temperature for SB370-T?
The SB370-T has an operating junction temperature range of –65°C to +150°C. This wide range supports deployment in under-hood automotive environments and industrial enclosures without forced cooling, provided thermal design maintains TJ ≤ 150°C using the specified RθJA of 20 K/W and ambient or lead temperature derating curves.
Is SB370-T qualified to AEC-Q101?
While SB370-T is manufactured in IATF 16949-certified facilities and built with AEC-Q101-aligned process controls, Diodes does not list it as a formally qualified AEC-Q101 part in public documentation. Customers requiring certified qualification should contact Diodes directly for PPAP-ready variants such as SB370Q-T.
Can SB370-T replace SB360-T in existing designs?
Yes-SB370-T (70V VRRM) can safely replace SB360-T (60V VRRM) in most applications, offering higher reverse voltage margin. However, verify that layout clearance and system transient limits accommodate the 10V increase, and confirm no change in forward voltage (0.75V vs. 0.72V) affects regulation loop stability in tightly controlled feedback systems.
What is the moisture sensitivity level (MSL) for SB370-T?
SB370-T is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life at ≤30°C/85% RH and requires no baking prior to standard SMT or through-hole assembly processes-ideal for high-mix, low-volume production environments.
SB370-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -65°C ~ 150°C
SB370-T FAQ
1.How can I place an order for SB370-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SB370-T 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 SB370-T reliable?
The price and inventory of SB370-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SB370-T is usually 5 days.
3.What payment methods are accepted for SB370-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SB370-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SB370-T?
SB370-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SB370-T 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 SB370-T?
For technical support, including SB370-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SB370-T requirements.
6.How does Aetrix verify that SB370-T is sourced from the original manufacturer or authorized distributors?
All SB370-T 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 SB370-T meets industry standards.
7.What is the process for return or replacement of SB370-T?
All SB370-T units undergo pre-shipment inspection (PSI). If there is an issue with SB370-T, 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 SB370-T part is unused and in its original packaging.
Return procedure for SB370-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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