My Inquiry
My Account
Diodes Incorporated SB190-T
- Part No.:
- SB190-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
SB190-T.pdf
- Description:
- DIODE SCHOTTKY 90V 1A DO41
- Quantity:
- Payment:
- Shipping:
Inventory:4,742
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SB190-T from Diodes Incorporated is a 1.0A, 90V high-voltage Schottky barrier rectifier in DO-41 package, featuring 0.80V forward voltage at 1.0A, 25A non-repetitive surge capability, and 0.5mA peak reverse current at 25°C. It serves as a low-loss freewheeling or polarity protection diode in DC-DC converters and AC/DC front-end stages.
For engineers reviewing the SB190-T datasheet, SB190-T pinout, SB190-T application, or SB190-T equivalent, key selection criteria include its 90V VRRM rating, thermal resistance (RJL = 15 K/W), junction capacitance (80 pF @ 4V), RoHS-compliant tin-plated leads, and suitability for high-frequency switching up to 1 MHz.
Technical Context
This Schottky rectifier uses guard ring die construction to enhance transient immunity and prevent edge breakdown under high dv/dt conditions. Its low forward voltage drop and fast recovery (inherently <10 ns) minimize conduction and switching losses in continuous conduction mode (CCM) flyback and buck-derived topologies.
Designed for operation from –65°C to +125°C, it maintains stable reverse leakage (<10 mA at 100°C) and supports lead-free reflow soldering at 260°C/10 sec. The DO-41 package enables axial through-hole mounting with UL 94V-0 flammability compliance and moisture sensitivity level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 90 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in polarity protection and clamp circuits. |
| IO @ TT = 85°C | 1.0 A - Average forward current derated to 85°C case temperature; usable in compact heatsinkless designs. |
| VFM @ IF = 1.0A | 0.80 V - Low conduction loss enabling >92% efficiency in 5–12V output DC-DC stages. |
| IFSM (8.3ms) | 25 A - Surge withstand capability for inrush and fault transients without bond wire fusing. |
| IRM @ 25°C | 0.5 mA - Low leakage ensures minimal standby power loss in battery-backed systems. |
| Cj @ 1MHz, 4V | 80 pF - Junction capacitance limiting high-frequency noise coupling in EMI-sensitive SMPS inputs. |
| RJL | 15 K/W - Thermal resistance from junction to lead; enables direct PCB copper pour heat sinking without external heatsink. |
Pinout & Package
DO-41 axial-leaded plastic package with cathode band marking. Leads are bright tin-plated, solderable per MIL-STD-202 Method 208. Mounting position unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck converter); must handle full load current and surge. |
| Cathode (Lead 2, banded) | Forward current exit / reverse blocking terminal | Connected to higher-potential rail (e.g., output capacitor positive); reverse voltage applied here during off-state. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Prevents premature edge breakdown under high dv/dt, improving reliability in fast-switching inverters. |
| Low thermal resistance (RJL = 15 K/W) | Enables direct lead-to-PCB thermal path, eliminating need for thermal vias or heatsinks in 1W dissipation designs. |
| RoHS-compliant tin plating | Supports lead-free reflow (260°C/10 sec) and eliminates post-solder cleaning in high-volume assembly. |
| UL 94V-0 molded case | Meets flame-retardancy requirements for industrial and medical power supplies without additional potting. |
Applications
| AC/DC Adapter Input Stage | Buck Converter Freewheeling Diode |
|---|---|
Use Scenario: Rectifying 50/60Hz AC input after transformer secondary in offline adapters. IC Role / Device Role / Timing Role: Unidirectional current path enabling half-wave rectification with minimal voltage drop. Use Value: 0.80V VFM reduces conduction loss by ~35% vs. standard PN diodes, lowering thermal stress on input capacitors. | Use Scenario: Providing current path during low-side MOSFET off-time in 12V→5V buck regulators. IC Role / Device Role / Timing Role: Freewheeling diode conducting inductor current when main switch is off. Use Value: Fast intrinsic recovery avoids reverse recovery spikes, reducing EMI and gate drive stress on synchronous FETs. |
| Polarity Protection Circuit | DC Power Input Clamp |
Use Scenario: Reverse-voltage protection at 24V system inputs (e.g., industrial sensors, PLC modules). IC Role / Device Role / Timing Role: Series-blocking diode preventing damage from accidental battery reversal. Use Value: 90V VRRM provides 2× margin over 24V nominal, while 0.5mA IRM minimizes quiescent drain in always-on devices. | Use Scenario: Clamping inductive kickback from solenoids or relay coils in automotive body control modules. IC Role / Device Role / Timing Role: Transient voltage clamp absorbing stored energy during coil de-energization. Use Value: 25A IFSM withstands repeated 20A coil surges without degradation; DO-41 mechanical robustness resists vibration fatigue. |
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 |
|---|---|---|---|
| Vishay VS-1N5819TR | 40V VRRM, 1.0A IO, 0.475V VFM - lower voltage rating but lower forward drop. | Not suitable for 90V blocking; limited to ≤36V systems. | Select only where input voltage stays below 28V and lowest possible conduction loss is critical. |
| ON Semiconductor SB190-E3/54 | Identical electrical specs; same DO-41 package but lead-free matte tin finish per J-STD-002B. | No functional difference; validated for same reflow profiles and reliability testing. | Drop-in replacement if sourcing flexibility or alternate qualification history is required. |
Compared with VS-1N5819TR and SB190-E3/54, SB190-T offers unique 90V blocking at 1.0A with industry-standard tape-and-reel packaging (5K/reel, 13-inch), making it optimal for automated SMT-compatible through-hole insertion in high-volume power supply manufacturing.
Availability
SB190-T is available at Aetrix Electronics and suitable for AC/DC adapters, buck converter freewheeling paths, and polarity protection circuits requiring stable component supply and long-term manufacturability.
Supply support for SB190-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 and manufacturing operations across Asia and the Americas.
The SBxx0 series belongs to Diodes' high-voltage Schottky rectifier product line, engineered specifically for efficiency-critical, high-frequency power conversion in consumer, industrial, and computing power supplies.
FAQ
What is the maximum junction temperature for SB190-T?
The SB190-T has an absolute maximum junction temperature of +125°C, with rated average forward current (1.0A) specified at a lead temperature (TT) of 85°C. Derating follows the curve in Figure 1: current reduces linearly to zero at 150°C lead temperature, but sustained operation above 125°C risks permanent parametric shift.
Is SB190-T suitable for use in synchronous rectification designs?
No - SB190-T is a passive Schottky rectifier, not a synchronous rectifier controller or MOSFET driver. It cannot replace active synchronous rectifiers (e.g., SiC MOSFETs with gate drivers) in high-efficiency designs, though it remains valid as a freewheeling diode in non-synchronous topologies.
Does SB190-T have a qualified AEC-Q200 rating for automotive use?
No - SB190-T is not AEC-Q200 qualified. While its operating temperature range (–65°C to +125°C) overlaps automotive requirements, Diodes Incorporated does not list this part in its AEC-Q200 stress-tested portfolio; automotive-grade alternatives like SB190Q are separately qualified.
Can SB190-T be used in capacitive-input filter applications?
Yes, but with 20% current derating per datasheet Note: "For capacitive load, derate current by 20%." This accounts for higher peak currents and RMS heating; thus, maximum average current drops to 0.8A in such configurations to ensure reliable long-term operation.
SB190-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 90 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 800 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 90 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
- Operating Temperature - Junction:
- -65°C ~ 125°C
SB190-T FAQ
1.How can I place an order for SB190-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SB190-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 SB190-T reliable?
The price and inventory of SB190-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SB190-T is usually 5 days.
3.What payment methods are accepted for SB190-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SB190-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SB190-T?
SB190-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SB190-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 SB190-T?
For technical support, including SB190-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SB190-T requirements.
6.How does Aetrix verify that SB190-T is sourced from the original manufacturer or authorized distributors?
All SB190-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 SB190-T meets industry standards.
7.What is the process for return or replacement of SB190-T?
All SB190-T units undergo pre-shipment inspection (PSI). If there is an issue with SB190-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 SB190-T part is unused and in its original packaging.
Return procedure for SB190-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SB190-T Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
