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Microchip Technology 1N482B
- Part No.:
- 1N482B
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N482B.pdf
- Description:
- DIODE GEN PURP 30V 200MA DO35
- Quantity:
- Payment:
- Shipping:
Inventory:7,145
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Product details
Overview
1N482B from Microsemi (now Microchip) is a high-conductance, general-purpose silicon rectifier diode in a DO-35 glass package, rated for 30 V PIV, 0.2 A average forward current, 1.0 V forward voltage at 0.1 A, 0.025 µA max leakage at 25 °C, and operation up to +200 °C junction temperature - used in power supply rectification and signal steering circuits.
For engineers reviewing the 1N482B datasheet, 1N482B pinout, 1N482B application, or 1N482B equivalent, key selection factors include its 30 V peak inverse voltage rating, 0.2 A average rectified current capability, low 1.0 V VF at 0.1 A, hermetic DO-35 glass package, and full-temperature-range reliability without derating.
Technical Context
The 1N482B is a standard PN-junction silicon rectifier optimized for high-temperature stability and low-leakage performance. Its DO-35 glass encapsulation provides hermetic sealing, enabling operation from –65 °C to +200 °C with no thermal fatigue or humidity-induced degradation.
It delivers 0.2 A average forward current at 25 °C ambient with 250 mW max power dissipation, and exhibits only 0.025 µA reverse leakage at 25 °C and 5 µA at 150 °C - confirming robust thermal matching and stable conduction across industrial and aerospace environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PIV | 30 V - maximum reverse voltage before breakdown; suitable for low-voltage DC power supply inputs and clamping. |
| IAV | 0.2 A - continuous forward current handling at 25 °C ambient; supports compact rectifier stages in space-constrained designs. |
| VF @ 0.1 A | 1.0 V - forward drop at nominal operating current; enables predictable power loss calculation and thermal design. |
| IR @ 25 °C | 0.025 µA - ultra-low reverse leakage ensures minimal standby current in battery-backed or precision bias circuits. |
| Tj Range | –65 to +200 °C - full-rated operation without derating; validated for under-hood automotive, downhole, and military applications. |
| Pdiss | 250 mW - maximum steady-state power dissipation; defines thermal interface requirements for PCB copper area or heatsinking. |
Pinout & Package
DO-35 glass axial package: cylindrical glass body (1.0 mm diameter × 3.05–5.08 mm length), with tinned copper alloy leads (0.458–0.558 mm diameter). Hermetically sealed, humidity-proof construction with Sigma Bond™ plated contacts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward current entry point | Connects to higher-potential node in rectifier or steering path; polarity must be observed to avoid reverse conduction. |
| Cathode (K) | Forward current exit point | Marked by band on glass body; connects to lower-potential node; determines direction of current flow and clamping polarity. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic DO-35 glass package | Prevents moisture ingress and long-term parameter drift; eliminates need for conformal coating in humid or corrosive environments. |
| –65 to +200 °C junction range | Enables use in uncooled engine compartments, avionics bays, and industrial ovens without thermal derating or reliability penalties. |
| Sigma Bond™ plated leads | Guarantees solderability per J-STD-002/003; supports lead-free reflow profiles including high-temp IR soldering on ceramic substrates. |
| 0.025 µA IR @ 25 °C | Minimizes reverse-bias power loss in precision reference or sample-hold circuits where leakage affects accuracy. |
Applications
| Power Supply Rectification | Signal Clipping & Limiting |
|---|---|
Use Scenario: Converting AC line or transformer output to DC in low-power linear supplies for instrumentation and control modules. IC Role / Device Role / Timing Role: Unidirectional current valve performing half-wave or full-wave rectification with minimal forward loss. Use Value: Stable 1.0 V VF and 0.2 A IAV enable predictable efficiency and thermal rise in enclosed enclosures without forced air cooling. | Use Scenario: Protecting ADC inputs or op-amp rails from overvoltage transients in sensor front-ends. IC Role / Device Role / Timing Role: Passive clamp limiting signal swing to ±0.7 V beyond rail using forward conduction. Use Value: Low 0.025 µA leakage preserves input impedance integrity; DO-35 size allows placement directly at connector or IC pin. |
| High-Temperature Embedded Control | Harsh-Environment Signal Steering |
Use Scenario: Providing isolated logic-level translation in turbine controller PCBs exposed to sustained 150 °C ambient. IC Role / Device Role / Timing Role: Diode-ORing or level-shifting element routing control signals between hot and cold zones. Use Value: Validated 5 µA IR at 150 °C ensures reliable switching margin and avoids false triggering in safety-critical paths. | Use Scenario: Routing analog sensor outputs across isolation barriers in oilfield downhole tools. IC Role / Device Role / Timing Role: Bidirectional ESD protection and signal path selector in multiplexed sensor arrays. Use Value: Hermetic glass package withstands high-pressure, high-H2S environments where plastic packages fail prematurely. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar general-purpose rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4148 | Lower PIV (100 V), higher VF (1.25 V @ 10 mA), smaller IAV (150 mA), same DO-35 package | Better for high-speed switching (>4 ns trr); less suited for continuous 0.2 A rectification | Select 1N4148 only when fast recovery (<4 ns) is required over sustained current handling. |
| 1N4001 | Higher PIV (50 V), higher IAV (1.0 A), larger DO-41 package, VF = 1.1 V @ 1 A | Designed for higher-power AC/DC adapters; requires more PCB area and different mounting tooling | Choose 1N4001 when >0.2 A average current or >30 V PIV headroom is needed; not a direct footprint replacement. |
Compared with 1N4148 and 1N4001, the 1N482B uniquely balances low-leakage, high-temperature operation, and DO-35 form factor - making it optimal for space-limited, thermally aggressive rectification where reliability outweighs speed or raw current capacity.
Availability
1N482B is available at Aetrix Electronics and suitable for power supply rectification, signal clipping, high-temperature embedded control, and harsh-environment signal steering requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N482B 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 (acquired by Microchip Technology in 2018) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and high-temperature analog and discrete components.
The 1N482B belongs to Microsemi's legacy high-temperature rectifier diode family, engineered specifically for mission-critical applications demanding hermetic packaging, extended thermal range, and zero derating up to +200 °C.
FAQ
What is the maximum junction temperature rating for the 1N482B?
The 1N482B has a specified junction temperature range of –65 °C to +200 °C, with full electrical performance guaranteed across this entire span and no required derating. This makes the 1N482B suitable for under-hood automotive, downhole oil/gas, and aerospace applications where ambient temperatures exceed 125 °C.
Does the 1N482B have a hermetic package?
Yes, the 1N482B uses a DO-35 glass axial package that is fully hermetic and humidity-proof. The glass-to-metal seal prevents moisture ingress and ensures long-term parameter stability - a critical advantage over plastic-packaged diodes in high-humidity or corrosive environments where the 1N482B is deployed.
What is the forward voltage drop of the 1N482B at 0.1 A?
The 1N482B exhibits a maximum forward voltage drop of 1.0 V at 0.1 A and 25 °C, as confirmed in the manufacturer's published characteristics table. This value remains stable across temperature, supporting accurate power loss modeling in thermal-sensitive designs using the 1N482B.
Can the 1N482B be used in surface-mount assembly processes?
Although the 1N482B is an axial-lead DO-35 device, it is fully compatible with automated pick-and-place equipment and supports both tin-lead and lead-free IR reflow soldering - including on ceramic substrates. Its Sigma Bond™ plated leads guarantee solderability per J-STD-002/003, enabling reliable through-hole or modified SMT-style assembly of the 1N482B.
How does the 1N482B compare to the 1N483B in terms of PIV rating?
The 1N482B has a peak inverse voltage (PIV) rating of 30 V, while the 1N483B is rated for 60 V PIV. Both share identical forward characteristics (0.2 A IAV, 1.0 V VF @ 0.1 A, same DO-35 package), so the 1N482B is selected when system reverse voltage stress stays below 30 V - allowing tighter voltage margining and cost optimization without sacrificing thermal or reliability performance of the 1N482B.
1N482B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 100 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 25 nA @ 30 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
- Operating Temperature - Junction:
- -65°C ~ 200°C
1N482B FAQ
1.How can I place an order for 1N482B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N482B 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 1N482B reliable?
The price and inventory of 1N482B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N482B is usually 5 days.
3.What payment methods are accepted for 1N482B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N482B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N482B?
1N482B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N482B 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 1N482B?
For technical support, including 1N482B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N482B requirements.
6.How does Aetrix verify that 1N482B is sourced from the original manufacturer or authorized distributors?
All 1N482B 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 1N482B meets industry standards.
7.What is the process for return or replacement of 1N482B?
All 1N482B units undergo pre-shipment inspection (PSI). If there is an issue with 1N482B, 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 1N482B part is unused and in its original packaging.
Return procedure for 1N482B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N482B Tags
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onsemi
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BAV21W-7-F
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