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Diodes Incorporated B190B-13
- Part No.:
- B190B-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
B190B-13.pdf
- Description:
- DIODE SCHOTTKY 90V 1A SMB
- Quantity:
- Payment:
- Shipping:
Inventory:191
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Product details
Overview
B190B-13 from Diodes Incorporated is a 1.0A, 90V high-voltage Schottky barrier rectifier in SMB package with guard ring die construction for transient protection, 0.79V forward voltage at 1.0A/25°C, 30A non-repetitive surge rating, and UL 94V-0 molded plastic case-used in low-voltage, high-frequency inverters and polarity protection circuits.
For engineers reviewing the B190B-13 datasheet, B190B-13 pinout, B190B-13 application, or B190B-13 equivalent, key selection criteria include peak reverse voltage (90V), forward voltage drop at rated current, thermal resistance (25 K/W), junction capacitance (80 pF @ 4V), and SMB package compatibility with automated assembly.
Technical Context
This Schottky rectifier employs a guard ring die structure to enhance transient voltage immunity and reduce leakage under high dv/dt conditions. Its low forward voltage (0.79V @ 1.0A, 25°C) and fast switching response stem from metal–semiconductor junction physics, not PN junction recovery.
Thermal performance is defined by junction-to-terminal resistance of 25 K/W, assuming terminals held at ambient; derating follows a linear curve to 0A at 150°C terminal temperature. Junction capacitance is 80 pF measured at 1.0 MHz and 4.0V reverse bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 90 V - maximum repetitive reverse voltage before breakdown; sets safe operating limit in 48V–72V DC bus polarity protection |
| IO @ TT=125°C | 1.0 A - average forward current with terminal temperature at 125°C; defines continuous conduction capability in thermally constrained layouts |
| VFM @ IF=1.0A, TA=25°C | 0.79 V - forward voltage drop at rated DC current; directly determines conduction loss (0.79W per device) |
| IFSM (8.3ms) | 30 A - non-repetitive surge current handling; supports motor startup or capacitor charging transients without failure |
| RJT | 25 K/W - junction-to-terminal thermal resistance; enables thermal design using terminal as primary heat path, not PCB copper |
| Cj @ 1MHz, VR=4V | 80 pF - junction capacitance; impacts high-frequency switching noise and EMI filtering requirements in inverter outputs |
Pinout & Package
SMB (DO-214AA) surface-mount plastic package with cathode band marking; dual-terminal configuration (anode and cathode), designed for reflow soldering at 260°C/10 sec; weight 0.093 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential side (e.g., ground or return path) in polarity protection; must handle full load current and surge |
| Cathode | Current exit point during forward conduction; marked with band | Connected to input supply rail; reverse-biased during fault conditions to block reverse current flow |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves transient voltage immunity and reduces IR drift under high dv/dt, critical for inverter leg freewheeling |
| Low forward voltage (0.79V @ 1A) | Reduces conduction losses by ~30% vs. comparable PN rectifiers, enabling higher efficiency in 12–48V power rails |
| UL 94V-0 plastic case | Meets flammability safety requirements for industrial and automotive under-hood applications without additional potting |
| 260°C/10s solderability | Compatible with standard lead-free reflow profiles, eliminating need for special thermal profiling in SMT lines |
Applications
| DC Power Input Polarity Protection | High-Frequency Inverter Freewheeling |
|---|---|
Use Scenario: Reverse battery connection protection in 24V industrial controllers with unregulated input. IC Role / Device Role / Timing Role: Unidirectional current valve placed in series with input rail; blocks reverse current while passing forward current with minimal loss. Use Value: Prevents damage to downstream DC/DC converters and microcontrollers; 0.79V drop limits power dissipation to <0.8W at 1A. | Use Scenario: Freewheeling path in 100kHz flyback converter output stage driving inductive loads. IC Role / Device Role / Timing Role: Provides low-loss, zero-recovery-path for inductive kickback energy during MOSFET off-time. Use Value: Eliminates reverse recovery loss and associated ringing; 80pF capacitance minimizes high-frequency coupling into gate drive loop. |
| Capacitor Charging Clamp | Low-Voltage AC/DC Adapter Output |
Use Scenario: Clamping surge current during bulk capacitor pre-charge in telecom power modules. IC Role / Device Role / Timing Role: Absorbs 30A single-half-sine surge (JEDEC method) without latch-up or parametric shift. Use Value: Enables robust inrush limiting without parallel TVS or NTC thermistors; guard ring ensures stable IR under repeated surges. | Use Scenario: Output rectification in compact 12V/1A wall adapter with space-constrained SMB footprint. IC Role / Device Role / Timing Role: Converts transformer secondary AC to regulated DC; operates continuously at 1.0A with terminal temp ≤125°C. Use Value: SMB package fits tight board spacing; 25 K/W RJT allows direct heatsinking via copper pour under cathode pad. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS19-E3/5AT (Vishay) | Same SMB package, 90V VRRM, but 0.85V VFM @ 1A/25°C and 20A IFSM | Lower surge tolerance; less suitable for motor-start or capacitor-charging surges | Select when surge margin is relaxed and cost sensitivity outweighs 60mV conduction loss penalty |
| SB190 (ON Semiconductor) | Identical 90V/1A rating and SMB package, but 0.82V VFM and no guard ring specification | Reduced transient immunity; may exhibit higher IR drift in noisy industrial environments | Prefer where ESD/transient stress is low and legacy BOM alignment is required |
Compared with SS19-E3/5AT and SB190, B190B-13 delivers superior surge robustness (30A vs. 20A/-) and lower forward loss (0.79V), while its guard ring structure provides verified transient resilience absent in SB190-making it optimal for inverter and industrial power input stages.
Availability
B190B-13 is available at Aetrix Electronics and suitable for DC input protection, high-frequency inverter freewheeling, and low-voltage AC/DC adapter designs requiring stable component supply and consistent SMB footprint compliance.
Supply support for B190B-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, specializing in high-efficiency power management and signal integrity solutions for industrial, computing, and consumer markets.
The B170/B–B1100/B series targets cost-sensitive, high-reliability power rectification in space-constrained applications-designed specifically for automated assembly, thermal efficiency, and transient-hardened operation in 12–72V systems.
FAQ
What is the maximum allowable terminal temperature for continuous operation?
The B190B-13 supports continuous operation up to 125°C terminal temperature (TT), delivering its full 1.0A average forward current at that point. Operation beyond 125°C requires linear derating per Figure 1 in DS30018 Rev. B-2, reaching zero current at 150°C. Thermal design must ensure terminals remain at or below TT = 125°C under worst-case ambient and power dissipation.
Does B190B-13 have a specified reverse recovery time?
No-B190B-13 is a Schottky barrier rectifier and exhibits no minority-carrier reverse recovery. Its switching behavior is governed by junction capacitance (80 pF) and series resistance, not stored charge. This eliminates reverse recovery loss and associated EMI, making it suitable for high-frequency (>50 kHz) switching applications without snubbers.
Can B190B-13 be used in capacitive-load applications without derating?
No. Per the datasheet, average forward current must be derated by 20% for capacitive loads due to higher peak currents during charging cycles. At 1.0A rated IO, this means limiting continuous current to 0.8A in applications like bulk capacitor input filters or LED driver front-ends with large input capacitance.
Is the "B" suffix in B190B-13 indicative of SMB packaging?
Yes-the "B" suffix explicitly denotes the SMB (DO-214AA) package variant. The base part number B190 refers to the 90V die; B190B confirms SMB molding, cathode band marking, and mechanical dimensions per the SMB column in the mechanical data table (e.g., A = 3.30–3.94 mm, weight = 0.093 g). SMA variants omit the "B" suffix.
B190B-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- 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:
- SMB
- Operating Temperature - Junction:
- -65°C ~ 150°C
B190B-13 FAQ
1.How can I place an order for B190B-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for B190B-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 B190B-13 reliable?
The price and inventory of B190B-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B190B-13 is usually 5 days.
3.What payment methods are accepted for B190B-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B190B-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B190B-13?
B190B-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B190B-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 B190B-13?
For technical support, including B190B-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B190B-13 requirements.
6.How does Aetrix verify that B190B-13 is sourced from the original manufacturer or authorized distributors?
All B190B-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 B190B-13 meets industry standards.
7.What is the process for return or replacement of B190B-13?
All B190B-13 units undergo pre-shipment inspection (PSI). If there is an issue with B190B-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 B190B-13 part is unused and in its original packaging.
Return procedure for B190B-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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