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Microchip Technology 1N6353US/TR
- Part No.:
- 1N6353US/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, B
- Datasheet:
-
1N6353US/TR.pdf
- Description:
- DIODE ZENER 160V 500MW SQ-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:9,314
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Product details
Overview
1N6353US/TR from Microsemi is a military-qualified, voidless hermetically sealed glass Zener diode rated for 160 V nominal Zener voltage at 1.2 A test current, 0.5 W power dissipation, and ±5% tolerance, designed for high-reliability voltage regulation in aerospace and defense power conditioning circuits.
For engineers reviewing the 1N6353US/TR datasheet, 1N6353US/TR pinout, 1N6353US/TR application, or 1N6353US/TR equivalent, this part delivers radiation-hardened, ESD-insensitive, temperature-stable regulation across -65°C to +175°C with low dynamic impedance (2.7 Ω) and tight thermal resistance (21°C/W junction-to-end-cap).
Technical Context
This device operates as a precision shunt voltage regulator in reverse-biased breakdown mode, with Zener voltage specified at IZ = 1.2 A and characterized over full military temperature range (-65°C to +175°C). Its voidless glass construction and internal Category I metallurgical bond ensure long-term stability under thermal cycling and mechanical stress.
It exhibits a positive temperature coefficient of +0.110 %/°C above 100 V, low noise density (0.060 µV/√Hz), and surge capability up to 122 A (8.3 ms square wave), making it suitable for transient-suppressed reference and clamping in critical analog subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 160 V nominal at IZ = 1.2 A - defines stable regulation point for high-voltage biasing and reference generation |
| Power Dissipation (PD) | 0.5 W @ TEC = 150°C - sets maximum continuous DC power handling without derating |
| Dynamic Impedance (ZZT) | 2.7 Ω @ IZ = 1.2 A - determines output voltage variation under load current changes |
| Junction Temp Range | -65°C to +175°C - enables operation in extreme environmental conditions without parameter drift |
| Thermal Resistance (RθJEC) | 21°C/W - allows precise thermal modeling when mounted to heat-conducting end caps |
| Surge Current (IZSM) | 122 A (8.3 ms square wave) - supports transient overvoltage clamping in protection circuits |
| Temp Coefficient (αVZ) | +0.110 %/°C - quantifies voltage drift per degree rise above 25°C for system-level compensation |
Pinout & Package
B-SQ MELF ("D") package: hermetically sealed voidless hard glass case 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 circuit ground or lower potential node during Zener operation |
| Cathode | Reverse breakdown terminal / regulated output node | Provides stable 160 V reference when biased above VZ; marked with band |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal voids to prevent moisture ingress and parameter shift over 20+ year field life |
| Category I metallurgical bond | Ensures mechanical integrity under shock/vibration per MIL-STD-883, critical for avionics mounting |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per MicroNote 050 - no derating needed in space-grade designs |
| ESD immunity | Non-sensitive per MIL-STD-750 Method 1020 - survives >4 kV HBM without parameter degradation |
| MIL-PRF-19500/533 qualified | Available in JAN, JANTX, JANTXV, JANS reliability levels - traceable lot documentation and screening included |
Applications
| High-Voltage Power Supply Reference | Aerospace Sensor Biasing |
|---|---|
Use Scenario: Stable 160 V reference for photomultiplier tube (PMT) gain control in radiation detection systems. IC Role / Device Role / Timing Role: Shunt voltage regulator providing fixed bias voltage independent of input ripple or load variation. Use Value: Maintains PMT gain stability within ±0.5% over -55°C to +125°C due to low tempco and hermetic construction. |
Use Scenario: Precision bias source for MEMS gyroscope front-end amplifiers in inertial measurement units (IMUs). IC Role / Device Role / Timing Role: Low-noise voltage reference (0.060 µV/√Hz) for analog signal chain DC offset setting. Use Value: Enables <1 µV/°C drift performance in closed-loop IMU calibration without external compensation. |
| Satellite Power Bus Clamp | Nuclear Instrumentation Clamping |
Use Scenario: Overvoltage clamp on 150 V spacecraft bus during solar array transients. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing 122 A surges (8.3 ms) without failure. Use Value: Prevents downstream DC-DC converter damage while maintaining <10 ns response time due to low capacitance. |
Use Scenario: Pulse-clamping element in scintillation detector pulse-shaping networks. IC Role / Device Role / Timing Role: Fast-recovery Zener limiting peak pulse amplitude to protect ADC inputs. Use Value: Delivers consistent 160 V clamping threshold across 10⁶ pulse cycles with zero parameter drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N6353DUS/TR | ±1% Zener tolerance vs. ±5% for 1N6353US/TR; identical package, power rating, and temperature range | Required where absolute voltage accuracy <±1.6 V is mandated (e.g., metrology-grade references) | Select 1N6353DUS/TR only if tighter tolerance justifies higher cost and longer lead time |
| SMF160A | Surface-mount SOD-123 package; 160 V standoff; 1 kW peak power; not hermetically sealed or MIL-qualified | Suitable for commercial industrial controls but lacks radiation hardness, ESD immunity, and long-term stability | Choose SMF160A only for non-critical, cost-sensitive, high-volume PCB assembly with no reliability certification required |
Compared with 1N6353DUS/TR and SMF160A, the 1N6353US/TR uniquely combines military qualification, voidless glass hermeticity, and Category I bonding-enabling use in flight-critical systems where parameter stability over 15+ years is non-negotiable.
Availability
1N6353US/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, nuclear instrumentation, satellite bus protection, and defense-grade sensor biasing requiring stable component supply across extended lifecycle programs.
Supply support for 1N6353US/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 analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N6353US/TR belongs to Microsemi's legacy MIL-PRF-19500/533-qualified Zener series, engineered for mission-critical voltage regulation where failure is not an option-especially in radiation-exposed, thermally cycled, or high-shock environments.
FAQ
What is the Zener voltage tolerance for 1N6353US/TR?
The 1N6353US/TR has a standard ±5% Zener voltage tolerance, meaning its nominal 160 V breakdown voltage falls between 152 V and 168 V at IZ = 1.2 A and 25°C. This tolerance is confirmed in the Electrical Characteristics table on page 3 of Microsemi's T4-LDS-0193-1 datasheet and applies across the full operating temperature range.
Is 1N6353US/TR RoHS compliant?
The 1N6353US/TR is not RoHS compliant by default; RoHS-compliant versions (e.g., 1N6353US e3) are available only in commercial grade, not in JAN/JANTX/JANTXV/JANS reliability levels. The "e3" suffix denotes matte tin finish, while standard 1N6353US/TR uses Sn/Pb end caps per MIL-PRF-19500/533 requirements.
What is the maximum surge current rating for 1N6353US/TR?
The 1N6353US/TR is rated for a non-repetitive peak Zener surge current (IZSM) of 122 A under an 8.3 ms square-wave waveform, as specified in the Electrical Characteristics table. This value is validated per MIL-STD-750 Method 2072 and reflects single-event transient suppression capability without parametric shift.
Does 1N6353US/TR require derating above 150°C end-cap temperature?
Yes - the 1N6353US/TR must be derated linearly above TEC = 150°C using RθJEC = 21°C/W, per Figure 2 in the datasheet. At 175°C end-cap temperature, maximum allowable power drops to 0 W; full 0.5 W rating applies only at or below 150°C.
How is polarity indicated on the 1N6353US/TR package?
Polarity is indicated by a visible cathode band on the glass body of the 1N6353US/TR. The banded end is the cathode; the opposite end is the anode. This marking conforms to JEDEC standards and is verified in the Mechanical and Packaging section (page 2) of the T4-LDS-0193-1 datasheet.
1N6353US/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):
- 160 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1200 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 122 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
1N6353US/TR FAQ
1.How can I place an order for 1N6353US/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6353US/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 1N6353US/TR reliable?
The price and inventory of 1N6353US/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6353US/TR is usually 5 days.
3.What payment methods are accepted for 1N6353US/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6353US/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6353US/TR?
1N6353US/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6353US/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 1N6353US/TR?
For technical support, including 1N6353US/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6353US/TR requirements.
6.How does Aetrix verify that 1N6353US/TR is sourced from the original manufacturer or authorized distributors?
All 1N6353US/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 1N6353US/TR meets industry standards.
7.What is the process for return or replacement of 1N6353US/TR?
All 1N6353US/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N6353US/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 1N6353US/TR part is unused and in its original packaging.
Return procedure for 1N6353US/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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