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Microchip Technology 1N5353A/TR8
- Part No.:
- 1N5353A/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5353A/TR8.pdf
- Description:
- DIODE ZENER 16V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,644
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Product details
Overview
1N5353A/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 16 V, ±10% tolerance (A suffix), 75 mA test current (IZT), 2.5 Ω maximum dynamic impedance (ZZ), and 1.0 μA maximum reverse leakage at 11.5 V. It delivers stable voltage reference in power supply feedback loops, overvoltage protection circuits, and precision biasing networks.
For engineers reviewing the 1N5353A/TR8 datasheet, 1N5353A/TR8 pinout, 1N5353A/TR8 application, or 1N5353A/TR8 equivalent, key selection criteria include its 16 V Zener voltage, 5 W steady-state power rating at TL < 25°C with 3/8" lead length, ±10% tolerance, 2.5 Ω dynamic impedance, and axial T-18 package compatibility with through-hole PCB assembly.
Technical Context
This device operates as a two-terminal voltage regulator in reverse-biased mode, maintaining a stable 16 V across its terminals over a wide current range (1.0 mA to 6.0 A surge). Its low thermal resistance (25 °C/W junction-to-lead) enables high-current operation with minimal temperature drift when mounted with adequate heat sinking.
The 1N5353A/TR8 exhibits minimal voltage regulation deviation (ΔVZ = 0.30 V), defined as the difference between voltages measured at 10% and 50% of IZM, and supports RoHS-compliant soldering at 260 °C for 10 s. Its cathode band marking and tin-lead or matte-tin plating ensure unambiguous polarity and reliable solderability per MIL-STD-750 Method 2026.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16 V ±10% - defines precise clamping level for overvoltage protection and reference generation |
| Test Current (IZT) | 75 mA - operating point where VZ is specified; sets minimum functional current for regulation |
| Dynamic Impedance (ZZ) | 2.5 Ω max - determines output voltage stability under varying load current |
| Max Reverse Leakage (IR) | 1.0 μA at 11.5 V - ensures low standby power loss in high-impedance bias networks |
| Power Dissipation | 5.0 W at TL < 25°C (3/8" lead length) - defines thermal design boundary for continuous operation |
| Surge Current (IZSM) | 6.0 A (8.3 ms half-sine) - supports transient overvoltage suppression without failure |
| Voltage Regulation (ΔVZ) | 0.30 V - quantifies variation between 10% and 50% of max Zener current, critical for precision references |
Pinout & Package
Package: Axial-leaded T-18 plastic case with void-free thermosetting epoxy body (UL94V-0), cathode indicated by colored band. Leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit ground or lower-potential rail; forms return path during Zener operation |
| Cathode | Zener regulation terminal / Voltage clamp node | Banded end; connected to regulated node or feedback point; maintains 16 V relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N53xx series | Ensures industry-standard mechanical and electrical interchangeability across manufacturers |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for SMT reflow or manual assembly |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Enables handling without special static control in standard production environments |
| High surge current capability (6.0 A) | Provides robust transient immunity in automotive and industrial power rails |
| Thermal resistance: 25 °C/W (junction-to-lead) | Allows >3 W continuous dissipation with minimal heatsinking on PCB leads |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters using optocoupler-coupled feedback. IC Role / Device Role / Timing Role: Zener reference element setting upper threshold for TL431 or optocoupler LED drive current. Use Value: 16 V clamping ensures stable 12–15 V output regulation with ±10% tolerance matching typical secondary-side error amplifier ranges. | Use Scenario: Protects microcontroller I/O pins from ESD or inductive kickback in motor drive circuits. IC Role / Device Role / Timing Role: Shunt clamp absorbing transient energy before it reaches sensitive logic inputs. Use Value: 6.0 A surge rating and 0.30 V ΔVZ enable fast, repeatable clamping without degradation during repeated 1 kV EFT events. |
| Programmable Voltage Reference | DC Bias Stabilization |
Use Scenario: Provides fixed reference for ADC input scaling or DAC output calibration in data acquisition modules. IC Role / Device Role / Timing Role: Precision voltage source establishing known potential for analog signal conditioning stages. Use Value: 2.5 Ω ZZ and 1.0 μA IR at 11.5 V minimize loading error and drift in high-impedance divider networks. | Use Scenario: Sets stable bias point for linear regulators or op-amp input stages in instrumentation amplifiers. IC Role / Device Role / Timing Role: Passive voltage reference stabilizing quiescent operating point against temperature and supply variation. Use Value: 25 °C/W thermal resistance and -65°C to +150°C operating range maintain ±0.5% reference stability across industrial ambient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5353B/TR8 | ±5% tolerance (vs. ±10% for 1N5353A/TR8); identical VZ, IZT, ZZ, and package | Higher precision required in feedback loops where tighter output voltage regulation is critical | Select 1N5353B/TR8 when system-level accuracy demands <±0.8 V deviation at 16 V nominal |
| MMBZ5245BS-7-F | Surface-mount SOD-123 package; 16 V ±5%; 200 mW power rating; 30 Ω ZZ | Space-constrained PCBs where axial leaded devices are incompatible with layout or automated assembly | Choose MMBZ5245BS-7-F only for low-power (<100 mA) biasing; not suitable for 5 W regulation loads |
Compared with 1N5353B/TR8, the 1N5353A/TR8 trades precision for cost and robustness in high-current applications, while MMBZ5245BS-7-F offers footprint reduction at the expense of power handling and thermal performance-making the 1N5353A/TR8 optimal for through-hole 5 W reference and clamp roles.
Availability
1N5353A/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and programmable voltage reference designs requiring stable component supply and long-term obsolescence management.
Supply support for 1N5353A/TR8 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, RF, and timing solutions for aerospace, defense, and industrial markets.
The 1N53xx series was designed specifically for ruggedized 5 W voltage regulation in harsh-environment power systems, emphasizing thermal resilience, surge immunity, and JEDEC-standardized form factor compatibility.
FAQ
What is the Zener voltage tolerance of the 1N5353A/TR8?
The 1N5353A/TR8 has a nominal Zener voltage of 16 V with a ±10% tolerance, as indicated by the "A" suffix per Microsemi's documentation. This means the actual measured VZ falls between 14.4 V and 17.6 V at 75 mA test current and 25 °C junction temperature. The tolerance directly impacts output regulation accuracy in feedback and clamp applications.
Can the 1N5353A/TR8 be used in surface-mount designs?
No, the 1N5353A/TR8 is an axial-leaded T-18 package device intended for through-hole mounting. It is not compatible with SMT reflow processes or pick-and-place assembly. For surface-mount equivalents, Microsemi offers the SMBJ5353A series, which shares the same electrical specs but uses DO-214AA packaging.
What is the maximum continuous power dissipation for the 1N5353A/TR8?
The 1N5353A/TR8 is rated for 5.0 W steady-state power dissipation when lead temperature (TL) is maintained below 25 °C with 3/8" (10 mm) lead length from the body. On FR4 PCB with 1 oz copper, derating applies-maximum power drops to 1.47 W at 25 °C ambient due to higher junction-to-ambient thermal resistance (85 °C/W).
Does the 1N5353A/TR8 meet RoHS requirements?
Yes, the 1N5353A/TR8 is RoHS compliant when ordered with the "e3" suffix (e.g., 1N5353Ae3/TR8). Standard production units use tin-lead plating, but RoHS-compliant matte-tin plating is available per Microsemi's specification and conforms to IPC/JEDEC J-STD-020B Level 1 moisture sensitivity.
How does the voltage regulation (ΔVZ) specification affect circuit performance?
The 1N5353A/TR8 has a maximum ΔVZ of 0.30 V-the difference between voltages measured at 10% and 50% of its maximum Zener current (IZM). This parameter quantifies how tightly the device holds regulation across its operational current range; lower ΔVZ values indicate superior line regulation, critical in precision reference and feedback applications where load-induced voltage drift must be minimized.
1N5353A/TR8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 16 V
- Tolerance:
- ±10%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 11.5 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 1 A
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- T-18
1N5353A/TR8 FAQ
1.How can I place an order for 1N5353A/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5353A/TR8 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 1N5353A/TR8 reliable?
The price and inventory of 1N5353A/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5353A/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5353A/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5353A/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5353A/TR8?
1N5353A/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5353A/TR8 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 1N5353A/TR8?
For technical support, including 1N5353A/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5353A/TR8 requirements.
6.How does Aetrix verify that 1N5353A/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5353A/TR8 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 1N5353A/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5353A/TR8?
All 1N5353A/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5353A/TR8, 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 1N5353A/TR8 part is unused and in its original packaging.
Return procedure for 1N5353A/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5353A/TR8 Tags
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