My Inquiry
My Account
Microchip Technology 1N6328DUS/TR
- Part No.:
- 1N6328DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, B
- Datasheet:
-
1N6328DUS/TR.pdf
- Description:
- DIODE ZENER 15V 500MW SQ-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:3,302
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N6328DUS/TR from Microsemi is a military-qualified, hermetically sealed 15 V ±1% Zener diode in MELF (B-SQ) package, rated for 0.5 W steady-state power dissipation at 150 °C end-cap temperature, with dynamic impedance of 600 Ω at 10 mA test current and 28 Ω at 250 µA, used for precision voltage regulation in high-reliability aerospace power conditioning circuits.
For engineers reviewing the 1N6328DUS/TR datasheet, 1N6328DUS/TR pinout, 1N6328DUS/TR application, or 1N6328DUS/TR equivalent, this page delivers verified electrical specs, MIL-PRF-19500/533 reliability level details, thermal derating curves, RoHS-compliant finish options, and surface-mount MELF packaging constraints critical for radiation-hardened and ESD-insensitive designs.
Technical Context
This device operates as a two-terminal voltage reference diode with sharp reverse breakdown at 15.0 V nominal (13.8–15.0 V min–nom range), specified at IZT = 10 mA and IZK = 250 µA. Its voidless glass construction and internal Category I metallurgical bond ensure stable regulation across –65 °C to +175 °C junction temperature.
Thermal resistance is RθJEC = 21 °C/W (junction-to-end-cap) and RθJA = 240 °C/W (junction-to-ambient on FR4 PCB), enabling predictable power derating per Figures 2 and 3. It exhibits low noise density (100 µV/√Hz @ 1–3 kHz) and positive temperature coefficient (+0.084 %/°C) above 6.8 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.0 V nominal, 13.8 V minimum at IZ = 10 mA - defines precise regulation point for feedback loops |
| Voltage Tolerance | ±1% (denoted by 'D' in part number) - enables tight-set reference accuracy without post-calibration |
| Power Dissipation (PD) | 0.5 W at TEC = 150 °C - sets maximum continuous DC load under defined thermal mounting |
| Dynamic Impedance (ZZT) | 600 Ω at IZT = 10 mA - determines output voltage variation under load transients |
| Max Surge Current (IZSM) | 11.0 A (8.3 ms square wave) - supports transient overvoltage clamping in protection circuits |
| Reverse Leakage (IR) | 0.05 µA max at VR = 12.0 V, 25 °C - ensures minimal standby current in high-impedance bias networks |
| Temp. Coefficient (αVZ) | +0.084 %/°C - quantifies drift direction and magnitude for thermal compensation design |
Pinout & Package
Hermetically sealed voidless glass MELF (B-SQ) package 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 reference node | Connected to circuit ground or lowest potential point in shunt regulator topology |
| Cathode | Reverse breakdown terminal / regulated output node | Provides stable 15.0 V reference when biased above VZ; marked by band |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/533 qualification | JAN/JANTX/JANTXV/JANS levels available - guarantees screening, testing, and traceability for defense/aerospace programs |
| Voidless hermetic glass seal | Prevents moisture ingress and long-term parameter drift - essential for >20-year mission life in space-grade systems |
| Category I metallurgical bond | Applied to 1N6321US–1N6355US series - ensures mechanical robustness against thermal cycling and vibration stress |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling and assembly |
| Radiation hardness | Inherently radiation-tolerant per MicroNote 050 - validated for total ionizing dose (TID) resilience in LEO/GEO orbits |
Applications
| Aerospace Power Bus Regulation | Defense Avionics Reference Supply |
|---|---|
Use Scenario: Regulating 15 V rail in satellite power distribution units where voltage stability must hold across –55 °C to +125 °C operational range. IC Role / Device Role / Timing Role: Shunt voltage reference providing feedback to DC-DC converter error amplifier. Use Value: ±1% tolerance and +0.084 %/°C TC enable <±20 mV total drift over full temperature range without trimming. |
Use Scenario: Generating precision bias for analog front-ends in radar receiver modules operating in high-vibration jet platforms. IC Role / Device Role / Timing Role: Two-terminal Zener reference establishing stable gain-setting node for RF amplifiers. Use Value: Voidless glass construction and Category I bond withstand 20 g RMS vibration per MIL-STD-810G without parameter shift. |
| Nuclear Instrumentation Signal Conditioning | Secure Communications Crypto Module |
Use Scenario: Biasing photomultiplier tube (PMT) divider chains in radiation detection equipment deployed in reactor containment zones. IC Role / Device Role / Timing Role: High-stability voltage reference ensuring consistent PMT gain calibration over decades. Use Value: Inherent radiation hardness (per MicroNote 050) prevents parametric degradation up to 100 krad(Si) TID exposure. |
Use Scenario: Providing tamper-resistant voltage reference for cryptographic key generation ICs in secure radio terminals. IC Role / Device Role / Timing Role: Unpowered reference node that must retain specification integrity during uncontrolled power-up/down cycles. Use Value: 0.05 µA max reverse leakage at 12 V ensures negligible current draw during battery-backed sleep states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N6328US/TR | Same 15 V nominal, but ±5% tolerance (no 'D' suffix); higher IZK = 9.5 mA vs. 8.5 mA | Acceptable where system-level calibration compensates for initial tolerance; lower cost for non-mission-critical use | Select 1N6328US/TR only if ±5% VZ meets closed-loop stability margin and no radiation/ESD hardening is required. |
| CMZ15C TR13 | 15 V ±5%, SOD-123FL package, 0.5 W rating, RθJA = 300 °C/W - less efficient thermal path than MELF | Suitable for commercial industrial controls; lacks MIL-PRF-19500 qualification and radiation hardness | Choose CMZ15C TR13 only for cost-sensitive, non-aerospace applications where board space constraints favor SMD flat lead over cylindrical MELF. |
Compared with 1N6328US/TR and CMZ15C TR13, the 1N6328DUS/TR uniquely combines ±1% tolerance, MIL-qualified reliability screening, voidless hermetic sealing, and proven radiation tolerance-making it irreplaceable in flight-critical voltage reference roles where parameter drift or failure is unacceptable.
Availability
1N6328DUS/TR is available at Aetrix Electronics and suitable for aerospace power regulation, defense avionics reference supplies, and nuclear instrumentation signal conditioning requiring stable component supply across extended product lifecycles and rigorous environmental compliance.
Supply support for 1N6328DUS/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) specialized in high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets before its 2018 acquisition.
The 1N63xxUS series was designed specifically for military-grade voltage regulation in space-constrained, high-stress environments where hermeticity, radiation tolerance, and long-term parametric stability are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N6328DUS/TR?
The 'D' in 1N6328DUS/TR denotes ±1% Zener voltage tolerance at 25 °C, confirmed in the Electrical Characteristics table on Page 3 of T4-LDS-0193-1 Rev. 1. This tighter tolerance enables direct use in precision feedback networks without post-manufacturing adjustment, unlike the ±5% 1N6328US/TR variant.
Is the 1N6328DUS/TR RoHS compliant?
Yes, the 1N6328DUS/TR is RoHS compliant (e3 marking) but only in commercial-grade versions; JAN/JANTX/JANTXV/JANS variants retain Sn/Pb finish per MIL-PRF-19500 requirements. The datasheet explicitly states RoHS compliance is available "commercial grade only" and applies to the matte tin finish on end caps.
What is the maximum surge current rating for the 1N6328DUS/TR?
The 1N6328DUS/TR has a maximum non-repetitive Zener surge current (IZSM) of 11.0 A for an 8.3 ms square wave, as specified in the Electrical Characteristics table. This value supports transient overvoltage suppression in power supply input stages without requiring additional TVS devices.
Does the 1N6328DUS/TR require derating at elevated temperatures?
Yes, the 1N6328DUS/TR must be derated above 150 °C end-cap temperature using the RθJEC = 21 °C/W curve in Figure 2. At 175 °C TJ, maximum power drops to zero; at 160 °C TEC, allowable power is approximately 0.36 W, calculated via linear derating from the 0.5 W baseline.
How is polarity identified on the 1N6328DUS/TR package?
Polarity is marked by a visible cathode band on the glass body of the 1N6328DUS/TR - consistent with JEDEC-standard MELF diode marking. The band identifies the cathode terminal, which must connect to the higher-potential node in shunt regulator configurations to enable reverse-bias operation.
1N6328DUS/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):
- 15 V
- Tolerance:
- ±1%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 11 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
1N6328DUS/TR FAQ
1.How can I place an order for 1N6328DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6328DUS/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 1N6328DUS/TR reliable?
The price and inventory of 1N6328DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6328DUS/TR is usually 5 days.
3.What payment methods are accepted for 1N6328DUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6328DUS/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6328DUS/TR?
1N6328DUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6328DUS/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 1N6328DUS/TR?
For technical support, including 1N6328DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6328DUS/TR requirements.
6.How does Aetrix verify that 1N6328DUS/TR is sourced from the original manufacturer or authorized distributors?
All 1N6328DUS/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 1N6328DUS/TR meets industry standards.
7.What is the process for return or replacement of 1N6328DUS/TR?
All 1N6328DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N6328DUS/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 1N6328DUS/TR part is unused and in its original packaging.
Return procedure for 1N6328DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6328DUS/TR Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-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…
