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Microchip Technology 1N5353C/TR8
- Part No.:
- 1N5353C/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5353C/TR8.pdf
- Description:
- DIODE ZENER 16V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,839
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Product details
Overview
1N5353C/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 16 V, ±2% tolerance (C suffix), 75 mA test current (IZT), 2.5 Ω maximum dynamic impedance (ZZ), and 6.0 V maximum voltage regulation (ΔVZ) across 10–50% of IZM. It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5353C/TR8 datasheet, 1N5353C/TR8 pinout, 1N5353C/TR8 application, or 1N5353C/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (75 A), reverse leakage at VR = 11.5 V, and compatibility with T-18 axial package mounting on FR4 PCBs.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse breakdown, where stable Zener voltage is maintained over a wide current range (10–50% of IZM). Its low dynamic impedance (2.5 Ω) and tight ±2% tolerance ensure minimal output variation under load and temperature shifts.
The 1N5353C/TR8 uses a void-free thermosetting epoxy case (UL94V-0), tin-lead or RoHS-compliant matte-tin plating, and cathode band polarity marking. Thermal performance is specified for both lead-temperature (TL) and ambient (TA) conditions, with derating curves provided for sustained operation above 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16 V ±2% - precise regulation point for feedback networks requiring stable reference under varying load |
| Test Current (IZT) | 75 mA - defined operating point for VZ measurement; sets minimum bias requirement for regulation |
| Dynamic Impedance (ZZ) | 2.5 Ω max - low AC resistance ensures minimal voltage shift during transient current changes |
| Max Regulator Current (IZM) | 6.0 A - maximum DC current at TL = 25 °C with adequate heat sinking (3/8″ lead length) |
| Voltage Regulation (ΔVZ) | 6.0 V max - difference between VZ measured at 10% and 50% of IZM; quantifies regulation linearity |
| Surge Current (IZSM) | 75 A - peak non-repetitive half-sine (8.3 ms) capability for transient overvoltage clamping |
| Thermal Resistance (RθJL) | 25 °C/W - junction-to-lead resistance enables thermal design with discrete heatsinking via leads |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-204AL. Moisture sensitivity level 1 (no dry pack required). Cathode indicated by color band; banded end must be biased positive relative to anode for Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node in reverse-biased configuration; defines reference ground path in shunt regulators |
| Cathode | Zener breakdown terminal | Banded end; connected to higher-potential node; carries full regulated current in shunt topology |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables high-accuracy voltage references without external trimming in analog power supplies |
| 25 °C/W junction-to-lead thermal resistance | Supports reliable 5 W dissipation with simple lead-based heatsinking-no PCB copper pour required |
| 75 A surge current rating (8.3 ms half-sine) | Provides robust transient suppression in industrial input stages without additional TVS devices |
| Nonsensitive to ESD per MIL-STD-750 Method 1020 | Eliminates need for handling precautions or on-board ESD protection in assembly environments |
| RoHS-compliant option (e3 suffix) | Meets environmental compliance requirements while maintaining identical electrical performance |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Used in optocoupler-coupled secondary-side feedback loop of isolated 48 V telecom DC-DC converter. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 16 V setpoint to TL431-like control IC. Use Value: ±2% tolerance ensures output voltage accuracy within ±0.5% over line/load/temperature, meeting GR-1253-CORE spec. | Use Scenario: Provides stable excitation voltage for bridge-based pressure transducer in oil-field downhole monitoring system. IC Role / Device Role / Timing Role: Precision analog reference source operating continuously at 75 mA in –40 °C to +125 °C environment. Use Value: Low ΔVZ (6.0 V) and 25 °C/W RθJL allow unregulated 24 V rail to deliver stable 16 V reference without active regulation or heatsink. |
| Overvoltage Clamp for PLC Input | Programmable Current Source Bias |
Use Scenario: Protects 24 V digital input channel of industrial PLC against 100 V transients induced by inductive load switching. IC Role / Device Role / Timing Role: Passive crowbar element conducting surge energy into common ground rail during overvoltage events. Use Value: 75 A IZSM rating handles worst-case 100 V/10 Ω surge without failure; 6.0 V ΔVZ limits clamping overshoot. | Use Scenario: Sets bias point for LM334-based 10 mA constant-current source driving RTD sensor in HVAC controller. IC Role / Device Role / Timing Role: Stable voltage reference defining current-setting resistor voltage drop in two-terminal current source. Use Value: Tight 2.5 Ω ZZ minimizes current drift due to supply ripple; 16 V VZ allows sufficient headroom for 3.3 V or 5 V logic-level control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5353B/TR8 | ±5% tolerance (vs. ±2%); otherwise identical VZ, IZT, ZZ, IZM, and package | Acceptable where 16 V ±0.8 V (vs. ±0.32 V) meets system accuracy budget | Select when cost sensitivity outweighs precision requirement; same thermal and surge performance |
| MMBZ5242BS-7-F | Surface-mount SOD-123 package; 16 V ±5%; 225 mW Pd; 100 mA IZM; not rated for 5 W operation | Limited to low-power signal-level regulation; unsuitable for >200 mW continuous dissipation | Choose only for space-constrained PCBs with <10 mA regulation current; not a functional replacement for 5 W load |
Compared with 1N5353B/TR8 and MMBZ5242BS-7-F, the 1N5353C/TR8 uniquely delivers ±2% tolerance at full 5 W dissipation in axial T-18 packaging-enabling high-accuracy, high-power shunt regulation where surface-mount alternatives lack thermal capacity and tighter-tolerance axial variants are cost-prohibitive.
Availability
1N5353C/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, sensor signal conditioning circuits, and programmable logic controller (PLC) input protection requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5353C/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 radiation-hardened components for aerospace, defense, and industrial markets.
The 1N53xx series was designed specifically for high-stability, high-power Zener regulation in harsh-environment power systems-emphasizing thermal robustness, surge resilience, and tight voltage tolerance without active circuitry.
FAQ
What is the Zener voltage tolerance of the 1N5353C/TR8?
The 1N5353C/TR8 has a Zener voltage tolerance of ±2%, as indicated by the "C" suffix in its part number. This means its nominal 16 V regulation voltage falls within 15.68 V to 16.32 V at 75 mA test current and 25 °C lead temperature. This tighter tolerance supports precision feedback and reference applications where standard ±5% (B suffix) devices would introduce unacceptable error.
Can the 1N5353C/TR8 be used in surface-mount designs?
No-the 1N5353C/TR8 is an axial-leaded T-18 package device and is not compatible with surface-mount assembly. Microsemi offers surface-mount equivalents such as SMBJ5353B for similar voltage ratings, but those differ in power rating (3 W vs. 5 W), package, and thermal characteristics. The 1N5353C/TR8 requires through-hole mounting with ≥3/8″ lead length for rated 5 W operation.
What is the maximum steady-state power dissipation of the 1N5353C/TR8 on a standard FR4 PCB?
When mounted on a standard FR4 PCB (1 oz Cu) with 4 mm² copper pads and 1 mm track width, the 1N5353C/TR8 has a steady-state power dissipation limit of 1.47 W at 25 °C ambient temperature. This is significantly lower than its 5 W rating at 25 °C lead temperature, due to higher junction-to-ambient thermal resistance (85 °C/W) in that configuration.
Does the 1N5353C/TR8 require dry-pack moisture protection before soldering?
No-the 1N5353C/TR8 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it is not moisture-sensitive and does not require dry-pack storage or baking prior to reflow or hand soldering. Its void-free epoxy encapsulation provides inherent moisture resistance per specification.
How is polarity marked on the 1N5353C/TR8?
The 1N5353C/TR8 uses a cathode band marking: a single colored band near one end of the cylindrical body identifies the cathode terminal. For proper Zener operation, this banded end must be connected to the more positive potential relative to the unmarked (anode) end. Forward voltage is guaranteed ≤1.2 V at 1.0 A, confirming standard silicon diode behavior in forward bias.
1N5353C/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:
- ±2%
- 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
1N5353C/TR8 FAQ
1.How can I place an order for 1N5353C/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5353C/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 1N5353C/TR8 reliable?
The price and inventory of 1N5353C/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5353C/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5353C/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5353C/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5353C/TR8?
1N5353C/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5353C/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 1N5353C/TR8?
For technical support, including 1N5353C/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5353C/TR8 requirements.
6.How does Aetrix verify that 1N5353C/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5353C/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 1N5353C/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5353C/TR8?
All 1N5353C/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5353C/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 1N5353C/TR8 part is unused and in its original packaging.
Return procedure for 1N5353C/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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