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Microchip Technology 1N6332US/TR
- Part No.:
- 1N6332US/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, B
- Datasheet:
-
1N6332US/TR.pdf
- Description:
- DIODE ZENER 22V 500MW SQ-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
1N6332US/TR from Microsemi is a military-qualified, voidless hermetically sealed glass Zener diode with nominal 22.0 V zener voltage, ±5% tolerance, 0.5 W power rating, and 20 mA test current (IZ2), designed for high-reliability voltage regulation in aerospace, defense, and industrial control systems.
For engineers reviewing the 1N6332US/TR datasheet, 1N6332US/TR pinout, 1N6332US/TR application, or 1N6332US/TR equivalent, this part delivers stable 22 V regulation across -65°C to +175°C, low dynamic impedance (500 Ω at IZ2), and radiation-hardened performance per MicroNote 050 - critical for mission-critical power rail stabilization and reference voltage generation.
Technical Context
This device operates as a precision shunt voltage regulator in reverse-biased breakdown mode, maintaining 22.0 V ±5% at 20 mA with 1.05 V voltage regulation (∆VZ) between 10–50% of IZM. Its voidless glass construction and internal metallurgical bond ensure long-term stability under thermal cycling and mechanical stress.
It exhibits a positive temperature coefficient of +0.087 %/°C and supports surge currents up to 17.0 A (8.3 ms square wave), with low noise density (100 µV/√Hz, 1–3 kHz) and ESD immunity per MIL-STD-750 Method 1020 - enabling use in harsh-environment analog references and overvoltage clamping circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22.0 V nominal at 20 mA - defines precise regulation point for feedback loops and reference rails |
| Power Dissipation (PD) | 0.5 W @ TEC = 150°C - sets maximum continuous power handling before thermal derating |
| Dynamic Impedance (ZZ) | 500 Ω @ IZ2 - determines output voltage variation under load transients |
| Max Reverse Current (IR1) | 0.05 µA @ VR = 17.0 V - ensures minimal leakage in standby or high-impedance bias networks |
| Junction Temperature Range | -65°C to +175°C - enables operation in extreme environments without derating penalties |
| Thermal Resistance (RθJEC) | 21°C/W - allows accurate junction temperature estimation from end-cap measurement |
| Temp Coefficient (αVZ) | +0.087 %/°C - quantifies voltage drift with temperature for precision reference design |
Pinout & Package
B-SQ MELF ("D") package: hermetically sealed voidless glass body with copper end caps (Sn/Pb or RoHS matte tin finish); cathode indicated by band; weight 0.0945 g; dimensions BD = 0.070–0.085 in (1.78–2.16 mm), BL = 0.165–0.195 in (4.19–4.95 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lower potential node in shunt regulator configuration |
| Cathode | Zener breakdown terminal / regulated output node | Connected to supply rail being stabilized; voltage referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and internal voids - ensures 100% reliability in vacuum and high-humidity environments |
| Category I metallurgical bond | Validated per MIL-PRF-19500/533 for JANTXV/JANS levels - guarantees bond integrity under shock/vibration |
| Radiation hardness | Inherently radiation-tolerant per MicroNote 050 - suitable for space-grade and nuclear instrumentation |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020 - withstands handling without protection circuitry |
| RoHS-compliant option | Available for commercial grade only - enables dual-use designs meeting environmental compliance |
Applications
| Aerospace Power Conditioning | Defense System Reference Voltage |
|---|---|
Use Scenario: Regulating 22 V reference in satellite power management units exposed to thermal cycling and radiation. IC Role / Device Role / Timing Role: Shunt voltage regulator providing stable bias for ADCs and op-amps in telemetry subsystems. Use Value: Maintains ±5% regulation over -65°C to +175°C with <100 µV/√Hz noise - preserving signal integrity in low-noise analog chains. |
Use Scenario: Generating precision 22 V reference for missile guidance sensor front-ends operating under high-G shock. IC Role / Device Role / Timing Role: Primary voltage reference element in inertial measurement unit (IMU) signal conditioning. Use Value: Category I metallurgical bond and voidless glass construction prevent parametric shift after 10,000 G shock events. |
| Industrial Control Loop Reference | Nuclear Instrumentation Bias Supply |
Use Scenario: Stabilizing 22 V rail for PLC analog I/O modules in oil refinery control cabinets. IC Role / Device Role / Timing Role: Zener shunt regulator in isolated 24 V DC-DC converter feedback path. Use Value: 0.5 W rating and 21°C/W RθJEC enable reliable operation at 85°C ambient without forced cooling. |
Use Scenario: Providing bias voltage for radiation detector preamplifiers in reactor monitoring systems. IC Role / Device Role / Timing Role: Radiation-hardened voltage reference ensuring consistent gain calibration over decades. Use Value: Inherent radiation tolerance per MicroNote 050 eliminates need for shielding or redundancy overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N6332DUS | ±1% Zener tolerance vs. ±5% for 1N6332US/TR; identical package, power, and temperature ratings | Required where tighter initial accuracy needed for calibration-critical references | Select 1N6332DUS when system-level calibration budget demands <±1% initial error |
| SMF22A | Surface-mount SOD-123 package; 22 V, 400 W peak power, but only 1 W average; no military qualification | Suitable for commercial automotive or consumer power supplies - not for aerospace/defense | Choose SMF22A only for cost-sensitive, non-military applications with lower reliability requirements |
Compared with 1N6332DUS and SMF22A, the 1N6332US/TR uniquely combines MIL-PRF-19500/533 qualification, voidless glass hermeticity, and Category I bonding - making it the sole choice for applications requiring guaranteed performance under radiation, shock, and extended temperature extremes.
Availability
1N6332US/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, defense system reference voltage generation, and industrial control loop stabilization requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N6332US/TR 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 Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and military-qualified components for aerospace, defense, and industrial markets.
The 1N6332US/TR belongs to Microsemi's legacy MIL-PRF-19500/533-qualified Zener diode family, engineered specifically for mission-critical voltage regulation where failure is not an option - including satellite avionics, missile guidance, and nuclear instrumentation.
FAQ
What is the Zener voltage tolerance of the 1N6332US/TR?
The 1N6332US/TR has a nominal Zener voltage of 22.0 V with a standard tolerance of ±5%, as specified in the Electrical Characteristics table on page 3 of the T4-LDS-0193-1 datasheet. Tighter tolerances (±1% and ±2%) are available under different suffixes (e.g., 1N6332DUS), but the /TR variant corresponds to the ±5% version.
Is the 1N6332US/TR qualified to MIL-PRF-19500/533 standards?
Yes, the 1N6332US/TR is qualified per MIL-PRF-19500/533 and available in JAN, JANTX, JANTXV, and JANS reliability levels. Its voidless glass construction, Category I metallurgical bond, and full environmental testing meet the stringent requirements for high-reliability military and aerospace applications.
What is the maximum steady-state power dissipation for the 1N6332US/TR?
The 1N6332US/TR has a steady-state power dissipation rating of 0.5 W at an end-cap temperature (TEC) of 150°C. Derating is required above this temperature, following the RθJEC = 21°C/W curve shown in Figure 2 of the datasheet for the 1N6321US–1N6355US series.
Does the 1N6332US/TR have radiation-hardened characteristics?
Yes, the 1N6332US/TR is inherently radiation-hardened as documented in Microsemi MicroNote 050. This characteristic arises from its voidless glass hermetic seal and internal metallurgical structure - enabling reliable operation in space, nuclear, and high-radiation terrestrial environments without additional shielding.
What is the cathode identification method for the 1N6332US/TR?
The cathode of the 1N6332US/TR is identified by a visible band on the glass body of the B-SQ MELF package. This marking aligns with JEDEC-standard polarity conventions and must be oriented toward the higher-potential node in shunt regulator configurations to ensure proper reverse-bias operation.
1N6332US/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SQ-MELF, B
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 17 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.4 V @ 1 A
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- B, SQ-MELF
1N6332US/TR FAQ
1.How can I place an order for 1N6332US/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6332US/TR 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 1N6332US/TR reliable?
The price and inventory of 1N6332US/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6332US/TR is usually 5 days.
3.What payment methods are accepted for 1N6332US/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6332US/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6332US/TR?
1N6332US/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6332US/TR 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 1N6332US/TR?
For technical support, including 1N6332US/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6332US/TR requirements.
6.How does Aetrix verify that 1N6332US/TR is sourced from the original manufacturer or authorized distributors?
All 1N6332US/TR 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 1N6332US/TR meets industry standards.
7.What is the process for return or replacement of 1N6332US/TR?
All 1N6332US/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N6332US/TR, 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 1N6332US/TR part is unused and in its original packaging.
Return procedure for 1N6332US/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6332US/TR Tags
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MM5Z5V1ST1G
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