My Inquiry
My Account
Microchip Technology DSB5822
- Part No.:
- DSB5822
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
DSB5822.pdf
- Description:
- DIODE SCHOTTKY 40V 3A DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:7,209
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DSB5822 from Microsemi is a hermetically sealed 3 A Schottky barrier rectifier with 40 V reverse voltage rating, 0.40 V forward voltage at 1.0 A, 0.50 V at 3.0 A, and 0.70 V at 9.4 A, designed for high-efficiency DC-DC conversion in aerospace power supplies.
For engineers reviewing the DSB5822 datasheet, DSB5822 pinout, DSB5822 application, or DSB5822 equivalent, key selection criteria include its MIL-PRF-19500/620 qualification, -65°C to +125°C operating temperature range, 30°C/W junction-to-ambient thermal resistance, and cathode-banded polarity marking.
Technical Context
The DSB5822 operates as a low-forward-voltage unidirectional power rectifier using a metallurgically bonded Schottky junction. Its hermetic "B" body package (per MIL-PRF-19500/620, D-5B) ensures reliability in harsh environments, with copper-clad steel leads and tin/lead finish.
Thermal performance is defined by a maximum junction-to-ambient thermal resistance of 30°C/W at 3/8″ lead length and 3°C/W transient thermal impedance. It supports average forward current of 3.0 A at TL = +55°C, derating linearly at 43 mA/°C above that temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VRWM) | 40 V - Maximum continuous blocking voltage before breakdown |
| Forward Voltage @ 1.0 A | 0.40 V - Low conduction loss enabling >90% efficiency in 5–12 V output converters |
| Forward Voltage @ 3.0 A | 0.50 V - Confirmed at rated average current; critical for thermal design at full load |
| Reverse Leakage @ 25°C | 0.10 mA - Minimal standby power loss in hold-up or standby circuits |
| Junction Temp Range | -65°C to +125°C - Qualified for military/aerospace ambient and internal heating conditions |
| Thermal Resistance (RθJA) | 30°C/W max - Enables passive heatsinking in compact, sealed enclosures |
Pinout & Package
Package: Hermetically sealed "B" body (MIL-PRF-19500/620, D-5B), axial-leaded, cathode end banded. Lead material: copper-clad steel; finish: tin/lead.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for forward conduction | Connected to input rail or transformer secondary; must withstand surge currents up to 9.4 A |
| Cathode | Output terminal for forward conduction | Banded end; connects to output filter capacitor and load; defines polarity-sensitive PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/620 qualification | Meets JAN/JANTX/JANTXV/JANS screening levels for radiation-hardened, high-reliability programs |
| Hermetic sealing | Prevents moisture ingress and corrosion in extended-life, vacuum, or high-humidity deployments |
| Metallurgical bonding | Eliminates wirebond fatigue failure modes common in thermal cycling applications |
| Low VF at high current | 0.50 V @ 3.0 A reduces I²R losses and junction self-heating versus silicon diodes |
Applications
| Avionics Power Supply | Satellite DC-DC Converter |
|---|---|
Use Scenario: Input rectification stage in 28 V aircraft bus-fed DC-DC modules powering flight control computers. IC Role / Device Role / Timing Role: Primary output rectifier handling 3 A continuous current with minimal voltage drop. Use Value: 0.50 V forward drop at 3 A enables higher efficiency than 1N5822, reducing thermal stress on adjacent regulators. | Use Scenario: Secondary-side synchronous rectification replacement in isolated 5 V/3 A point-of-load converters aboard LEO satellites. IC Role / Device Role / Timing Role: Unidirectional power switch converting transformer AC to regulated DC output. Use Value: Hermetic D-5B package ensures long-term reliability under thermal vacuum and radiation exposure. |
| Tactical Radio Transceiver | Missile Seeker Power Module |
Use Scenario: Input rectification in battery-backed 24 V DC power conditioning for handheld HF/VHF radios. IC Role / Device Role / Timing Role: Main rectifier in EMI-filtered front-end, operating across -40°C to +85°C ambient. Use Value: -65°C to +125°C junction rating allows operation in extreme cold storage and high-power transmit bursts. | Use Scenario: High-reliability rectification in seeker head power supply where failure is mission-critical. IC Role / Device Role / Timing Role: Final-stage rectifier delivering stable 15 V to infrared sensor bias circuitry. Use Value: MIL-qualified screening and metallurgical bonding prevent latent field failures during vibration and shock events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5822 | Same electrical specs (40 V, 3 A, 0.40/0.50/0.70 V VF), but non-hermetic DO-201AD package | Limited to commercial/industrial use; not qualified per MIL-PRF-19500 | Select DSB5822 when hermeticity, radiation tolerance, or extended temperature compliance is required. |
| DSB3A40 | Identical VRWM, VF, and thermal specs; same MIL-PRF-19500/620 qualification, but uses "A" body case (D-5A) | D-5A has different mechanical footprint and lead spacing vs. D-5B "B" body | Choose DSB5822 for legacy D-5B board layouts; verify mechanical fit before substituting DSB3A40. |
Compared with 1N5822 and DSB3A40, the DSB5822 uniquely combines D-5B hermetic packaging, full MIL-PRF-19500/620 screening, and proven thermal performance in constrained aerospace power envelopes-making it irreplaceable where mechanical form factor and qualification level are jointly specified.
Availability
DSB5822 is available at Aetrix Electronics and suitable for avionics power supplies, satellite DC-DC converters, and missile seeker power modules requiring stable component supply under extended temperature and radiation-exposed conditions.
Supply support for DSB5822 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
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal ICs, discrete devices, and RF solutions for defense, aerospace, and industrial markets.
The DSB5822 belongs to Microsemi's MIL-qualified Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in mission-critical systems where hermetic sealing and extended temperature operation are mandatory.
FAQ
What is the maximum average forward current rating for DSB5822?
The DSB5822 is rated for 3.0 A average rectified forward current at TL = +55°C with 3/8″ lead length. Above this temperature, current must be derated at 43 mA/°C. This rating reflects real-world thermal limits in sealed, convection-limited environments typical of aerospace enclosures. The DSB5822 maintains this capability due to its hermetic D-5B package and low thermal resistance.
Is DSB5822 pin-compatible with standard 1N5822 diodes?
No, the DSB5822 is not pin-compatible with commercial 1N5822 diodes. While both share identical electrical characteristics, the DSB5822 uses a hermetic "B" body (MIL-PRF-19500/620, D-5B) with specific lead spacing and mechanical dimensions, whereas 1N5822 uses the non-hermetic DO-201AD package. PCB layout changes are required to substitute DSB5822 for 1N5822.
Does DSB5822 meet MIL-PRF-19500/620 requirements?
Yes, the DSB5822 is explicitly qualified per MIL-PRF-19500/620, Class J, JX, JV, and JS screening levels. This includes environmental testing, burn-in, and electrical verification across temperature extremes. Documentation confirms DSB5822 meets all requirements for JAN, JANTX, JANTXV, and JANS versions-unlike commercial alternatives such as 1N5822.
What is the thermal resistance specification for DSB5822?
The DSB5822 has a maximum junction-to-ambient thermal resistance (RθJA) of 30°C/W at L = 0.375 inch (3/8″), and a transient thermal impedance (ZOJX) of 3°C/W. These values are measured under standardized MIL-test conditions and enable accurate thermal modeling in sealed chassis without forced airflow. The DSB5822 achieves this via metallurgical bonding and hermetic copper-clad steel leads.
Can DSB5822 be used in place of DSB3A40?
The DSB5822 and DSB3A40 share identical electrical specifications and MIL-PRF-19500/620 qualification, but differ mechanically: DSB5822 uses the "B" body (D-5B), while DSB3A40 uses the "A" body (D-5A). Their lead spacing and case dimensions are not interchangeable. Substituting DSB5822 for DSB3A40 requires PCB layout revision to accommodate the D-5B footprint.
DSB5822 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 500 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -65°C ~ 125°C
DSB5822 FAQ
1.How can I place an order for DSB5822 through Aetrix?
Please submit a Request for Quotation (RFQ) for DSB5822 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 DSB5822 reliable?
The price and inventory of DSB5822 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DSB5822 is usually 5 days.
3.What payment methods are accepted for DSB5822?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DSB5822 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DSB5822?
DSB5822 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DSB5822 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 DSB5822?
For technical support, including DSB5822 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DSB5822 requirements.
6.How does Aetrix verify that DSB5822 is sourced from the original manufacturer or authorized distributors?
All DSB5822 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 DSB5822 meets industry standards.
7.What is the process for return or replacement of DSB5822?
All DSB5822 units undergo pre-shipment inspection (PSI). If there is an issue with DSB5822, 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 DSB5822 part is unused and in its original packaging.
Return procedure for DSB5822:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DSB5822 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
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
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…
