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Diodes Incorporated B190-13
- Part No.:
- B190-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
B190-13.pdf
- Description:
- DIODE SCHOTTKY 90V 1A SMA
- Quantity:
- Payment:
- Shipping:
Inventory:3,342
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Product details
Overview
B190-13 from Diodes Incorporated is a 1.0A, 90V high-voltage Schottky barrier rectifier in SMA package, designed for low-loss freewheeling and polarity protection in DC/DC converters and AC-DC front-ends. It features 0.79V forward voltage at 1.0A/25°C, 30A non-repetitive surge rating, 80pF junction capacitance at 4V, and operates from –65°C to +150°C.
For engineers reviewing the B190-13 datasheet, B190-13 pinout, B190-13 application, or B190-13 equivalent, key selection criteria include forward voltage drop at operating temperature, thermal resistance (25K/W), reverse leakage at 100°C (5.0mA), and compatibility with automated SMT assembly on SMB/SMA footprints.
Technical Context
This discrete Schottky diode uses guard-ring die construction to enhance transient robustness and suppress leakage under high reverse bias. Its low VF and fast switching enable high-efficiency operation in 100kHz–1MHz DC/DC topologies without reverse recovery loss.
The device is rated for 1.0A average forward current at terminal temperature of 125°C, with derating required for capacitive loads (–20% IO). Junction-to-terminal thermal resistance of 25K/W supports direct PCB copper pad heat sinking without additional heatsinking in moderate-power designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 90V - Maximum repetitive reverse voltage before breakdown; sets safe operating margin for 48V bus clamp or 36V input rectification. |
| IO @ TT=125°C | 1.0A - Continuous forward current capability when terminal is held at 125°C; defines usable DC load current in thermally constrained layouts. |
| VFM @ 1.0A, 25°C | 0.79V - Forward voltage drop at nominal load; directly determines conduction loss (0.79W) and thermal rise in linear regulation or OR-ing circuits. |
| IFSM (8.3ms) | 30A - Peak surge withstand without failure; enables robustness against inrush or fault currents in power supply input stages. |
| IRM @ 100°C | 5.0mA - Reverse leakage at elevated temperature; impacts standby power and voltage hold-up in battery-backed systems. |
| RJT | 25K/W - Junction-to-terminal thermal resistance; allows estimation of junction temperature rise (ΔTj = Pd × 25) using measured terminal temperature. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount plastic case with cathode band marking. Terminals are solder-plated and compliant with MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node in buck freewheel path); must handle full load current and surge transients. |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; tied to higher-potential rail (e.g., output capacitor positive); sustains up to 90V reverse bias during off-state. |
Key Features
| Feature | Design Value |
|---|---|
| Guard-ring die construction | Improves ESD and surge immunity by suppressing edge breakdown; validated per JEDEC surge test (30A, 8.3ms half-sine). |
| Low VF at 100°C | 0.69V @ 1.0A - Maintains efficiency in high-ambient environments (e.g., enclosed industrial enclosures). |
| UL 94V-0 plastic material | Self-extinguishing housing meets safety standards for Class II power supplies and medical auxiliary circuits. |
| Automated assembly compatibility | SMA footprint aligns with IPC-7351B standard; supports 260°C/10s reflow without delamination or marking loss. |
Applications
| DC/DC Converter Freewheeling | 48V Input Rectification |
|---|---|
Use Scenario: Used as synchronous rectifier replacement in 300kHz buck converter output stage with 12V output and 1A load. IC Role / Device Role / Timing Role: Freewheeling diode providing low-loss current path during high-side MOSFET off-time. Use Value: 0.79V VF reduces conduction loss by ~35% vs. standard PN diode, lowering thermal stress on PCB copper area. | Use Scenario: Input bridge leg in isolated 48V-to-12V flyback adapter with 1A output. IC Role / Device Role / Timing Role: Polarity protection and input rectification element handling 60Hz line-frequency ripple plus high-frequency switching noise. Use Value: 90V VRRM provides 1.8× margin over 48V nominal input, accommodating line surges up to ±30V without breakdown. |
| OR-ing Diode in Dual-Supply Systems | Reverse Polarity Protection |
Use Scenario: Back-to-back configuration in redundant 24V power distribution for PLC I/O modules. IC Role / Device Role / Timing Role: Enables seamless switchover between primary and backup 24V supplies without voltage drop-induced brownouts. Use Value: Low 0.69V VF at 100°C ensures minimal voltage loss during hot-swapping, preserving 23.3V minimum at load under full thermal stress. | Use Scenario: In-line protection on 5V/3.3V board-level power inputs subject to accidental reverse connection. IC Role / Device Role / Timing Role: Blocking diode preventing damage to downstream LDOs and microcontrollers during miswiring events. Use Value: 30A IFSM withstands brief short-circuit currents during reverse-connection transients, eliminating need for fuse coordination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB190-E3/52 | Same 90V VRRM and 1.0A IO, but SMB package (higher thermal mass, 0.093g vs. 0.064g). | Lower thermal resistance (22K/W) supports higher ambient operation; requires larger PCB footprint. | Select when terminal temperature exceeds 125°C in continuous operation and board space permits SMB layout. |
| SS19 | 90V VRRM, 1.0A IO, but VF = 0.85V @ 1.0A/25°C and IRM = 10mA @ 100°C. | Higher conduction loss and leakage reduce efficiency in battery-powered or thermally isolated designs. | Acceptable only where cost sensitivity outweighs thermal or leakage requirements, e.g., consumer-grade adapters with forced air cooling. |
Compared with SB190-E3/52, B190-13 offers tighter footprint and faster assembly but slightly higher thermal resistance; versus SS19, it delivers lower VF and halved high-temp leakage-critical for industrial power rails where efficiency and reliability are prioritized over bill-of-materials cost.
Availability
B190-13 is available at Aetrix Electronics and suitable for DC/DC converter freewheeling, 48V input rectification, and reverse polarity protection requiring stable component supply across automotive body electronics, industrial PLC power modules, and telecom power interface boards.
Supply support for B190-13 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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.
B190-13 belongs to the B1xx/B series of high-voltage Schottky rectifiers engineered for high-frequency, low-loss power conversion in space-constrained industrial and communications equipment.
FAQ
What is the maximum allowable junction temperature for B190-13?
The absolute maximum junction temperature is +150°C, as specified in the DS30018 datasheet. Operation above this limit risks permanent degradation of the Schottky barrier. Derating curves show that average forward current drops to zero at 150°C terminal temperature, confirming thermal shutdown behavior under sustained overload.
Can B190-13 be used in place of a standard PN rectifier in a 24V AC adapter?
Yes-B190-13 replaces PN diodes in 24V AC adapters where low forward voltage is critical. Its 0.79V VF at 1.0A reduces conduction loss by ~40% versus a typical 1N5819 (0.9V), improving efficiency and reducing heatsink requirements. However, its 90V VRRM limits use to ≤36V RMS input; verify peak reverse voltage does not exceed rating.
Is B190-13 RoHS compliant and lead-free?
Yes-B190-13 is RoHS compliant and lead-free per Diodes Incorporated's product change notice PCN-2019-003. Terminal plating is matte tin, and the molded plastic body contains no restricted substances above threshold limits. Certificate of Compliance is available upon request for production lots.
Does B190-13 require a heatsink in a 1A continuous application?
No external heatsink is required if the PCB provides adequate copper area. With RJT = 25K/W and 0.79W dissipation at 25°C, junction temperature rise is ~20°C above terminal temperature. A 1-inch² 2oz copper pour typically holds terminal temperature within 40°C ambient, keeping Tj well below 125°C.
B190-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 90 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 790 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 90 V
- Capacitance @ Vr, F:
- 80pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
- Operating Temperature - Junction:
- -65°C ~ 150°C
B190-13 FAQ
1.How can I place an order for B190-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for B190-13 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 B190-13 reliable?
The price and inventory of B190-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B190-13 is usually 5 days.
3.What payment methods are accepted for B190-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B190-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B190-13?
B190-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B190-13 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 B190-13?
For technical support, including B190-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B190-13 requirements.
6.How does Aetrix verify that B190-13 is sourced from the original manufacturer or authorized distributors?
All B190-13 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 B190-13 meets industry standards.
7.What is the process for return or replacement of B190-13?
All B190-13 units undergo pre-shipment inspection (PSI). If there is an issue with B190-13, 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 B190-13 part is unused and in its original packaging.
Return procedure for B190-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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