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Microchip Technology 1N5353C/TR12
- Part No.:
- 1N5353C/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5353C/TR12.pdf
- Description:
- DIODE ZENER 16V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,164
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Product details
Overview
1N5353C/TR12 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 dynamic impedance (ZZ), and 295 Ω knee impedance (ZZK) at 1 mA - used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5353C/TR12 datasheet, 1N5353C/TR12 pinout, 1N5353C/TR12 application, or 1N5353C/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (6.0 A), maximum regulator current (75 mA), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device operates as a two-terminal voltage reference, conducting in reverse breakdown to maintain stable output voltage across a wide current range (1 mA to 75 mA). Its low dynamic impedance (2.5 Ω) ensures minimal voltage variation under load changes, while its 25 °C/W junction-to-lead thermal resistance enables reliable 5 W dissipation with minimal heatsinking when leads are trimmed to 10 mm.
The 1N5353C/TR12 features a void-free thermosetting epoxy T-18 package rated for -65 °C to +150 °C operation, cathode band polarity marking, and compliance with IPC/JEDEC J-STD-020B Level 1 moisture sensitivity - eliminating dry-pack requirements and supporting standard reflow soldering at 260 °C for 10 s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16 V ±2% - tight tolerance enables stable reference in feedback networks without post-calibration. |
| Test Current (IZT) | 75 mA - operating point where VZ and ZZ are specified; design must ensure minimum bias current ≥1 mA for regulation. |
| Dynamic Impedance (ZZ) | 2.5 Ω - low AC impedance minimizes output voltage ripple in shunt-regulated supplies. |
| Max Regulator Current (IZM) | 75 mA - maximum continuous DC current at TL = 25 °C; derates linearly above 25 °C per Figure 1. |
| Surge Current (IZSM) | 6.0 A (8.3 ms half-sine) - withstands transient overloads such as input line surges or capacitor discharge events. |
| Voltage Regulation (ΔVZ) | 0.30 V - difference between VZ measured at 10% and 50% of IZM; quantifies regulation linearity over operating range. |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - allows full 5 W dissipation with modest heatsinking at lead length ≤10 mm. |
| Forward Voltage (VF) | 1.2 V max @ 1.0 A - defines forward conduction loss during fault conditions or reverse-polarity protection use. |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case (void-free UL94V-0 epoxy), 0.7 g weight, cathode indicated by color band. Leads are tin-lead or RoHS-compliant matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased reference terminal | Connected to lower potential node; carries reverse leakage current until breakdown. |
| Cathode | Zener voltage reference terminal | Banded end; connected to regulated output node; defines 16 V reference relative to anode. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables high-accuracy voltage references without trimming or calibration in industrial power supplies. |
| JEDEC-registered 1N53xx series | Guarantees standardized electrical behavior, mechanical dimensions, and reliability across qualified suppliers. |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and bake-out prior to assembly, reducing manufacturing cost and risk. |
| RoHS-compliant e3 option | Meets environmental compliance mandates without performance trade-offs; matte-tin plating ensures solderability. |
| High surge current capability | Withstands 6.0 A non-repetitive surges (8.3 ms), protecting downstream circuitry during transient events. |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Shunt regulator in secondary-side feedback loop of isolated DC-DC converters. IC Role / Device Role / Timing Role: Zener reference element setting error amplifier threshold and regulating output voltage. Use Value: 16 V ±2% VZ provides precise setpoint for TL431-like control without external resistors, improving load regulation. | Use Scenario: Parallel-connected clamp across sensitive IC inputs or bus lines exposed to ESD or inductive kick. IC Role / Device Role / Timing Role: Voltage-limiting element diverting excess energy to ground before damage occurs. Use Value: 6.0 A surge rating and 0.30 V ΔVZ ensure predictable clamping within safe margins during fast transients. |
| Programmable Voltage Reference | Industrial Sensor Excitation |
Use Scenario: Stable bias source for op-amp circuits, ADC references, or analog front-end calibration. IC Role / Device Role / Timing Role: Precision DC reference generator maintaining fixed potential independent of supply variation. Use Value: Low 2.5 Ω ZZ and 295 Ω ZZK at 1 mA enable stable 16 V reference even at microamp-level bias currents. | Use Scenario: Constant-voltage excitation for resistive temperature detectors (RTDs) or strain gauges in harsh environments. IC Role / Device Role / Timing Role: Regulated bias source delivering consistent current through sensor elements. Use Value: -65 °C to +150 °C operating range and 25 °C/W RθJL support reliable operation in uncooled industrial enclosures. |
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/TR12 | ±5% VZ tolerance (vs. ±2% for C suffix); otherwise identical electrical and mechanical specs. | Acceptable where tighter regulation not required; lower cost in high-volume production. | Select 1N5353B/TR12 only if system-level testing confirms ±5% VZ meets stability margin. |
| MMSZ5245C-TP | Surface-mount SOD-123 package (vs. axial T-18); 16 V ±2%, but lower 500 mW rating and higher ZZ (15 Ω). | Suitable for space-constrained PCBs but cannot replace 1N5353C/TR12 in 5 W thermal designs. | Choose MMSZ5245C-TP only for low-power, high-density layouts where thermal budget permits <0.5 W dissipation. |
Compared with 1N5353B/TR12 and MMSZ5245C-TP, the 1N5353C/TR12 uniquely delivers ±2% tolerance at full 5 W dissipation in an axial package - making it optimal for industrial power supplies requiring both precision and robust thermal handling.
Availability
1N5353C/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, programmable voltage references, and industrial sensor excitation requiring stable component supply and long-term obsolescence management.
Supply support for 1N5353C/TR12 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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xx series was designed specifically for ruggedized, high-power Zener regulation in mission-critical power systems - emphasizing thermal robustness, surge resilience, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance of the 1N5353C/TR12?
The 1N5353C/TR12 has a Zener voltage tolerance of ±2%, as indicated by the "C" suffix per Microsemi's documentation. 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. The tighter tolerance supports precision feedback and reference applications where calibration overhead must be minimized.
Can the 1N5353C/TR12 be used in surface-mount designs?
No - the 1N5353C/TR12 uses an axial-leaded T-18 package and is not compatible with surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5353C series, while third-party alternatives like MMSZ5245C-TP provide 16 V ±2% regulation in SOD-123 packages - though at only 500 mW power rating, not 5 W.
What is the maximum steady-state power dissipation for the 1N5353C/TR12 on a standard PCB?
When mounted on a FR4 PCB with 1 oz copper, 4 mm² pads, and 1 mm × 25 mm traces, the 1N5353C/TR12 has a steady-state power rating of 1.47 W at 25 °C ambient. Its full 5 W rating applies only with adequate heatsinking at the leads (≤10 mm from body), achieving 25 °C/W junction-to-lead thermal resistance.
Does the 1N5353C/TR12 require dry packing before reflow soldering?
No - the 1N5353C/TR12 has IPC/JEDEC J-STD-020B Level 1 moisture sensitivity, meaning it may be stored and processed without dry packing or baking. It supports standard reflow profiles up to 260 °C for 10 seconds, per MIL-STD-750 Method 2026 solderability requirements.
How does the voltage regulation (ΔVZ) specification impact circuit performance for the 1N5353C/TR12?
The 1N5353C/TR12 specifies ΔVZ = 0.30 V - the difference between Zener voltage measured at 10% and 50% of IZM (7.5 mA and 37.5 mA). This quantifies regulation linearity: a lower ΔVZ indicates flatter VZ vs. current curve, critical for maintaining accuracy across varying load currents in shunt regulator applications.
1N5353C/TR12 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/TR12 FAQ
1.How can I place an order for 1N5353C/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5353C/TR12 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/TR12 reliable?
The price and inventory of 1N5353C/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5353C/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5353C/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5353C/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5353C/TR12?
1N5353C/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5353C/TR12 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/TR12?
For technical support, including 1N5353C/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5353C/TR12 requirements.
6.How does Aetrix verify that 1N5353C/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5353C/TR12 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/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5353C/TR12?
All 1N5353C/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5353C/TR12, 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/TR12 part is unused and in its original packaging.
Return procedure for 1N5353C/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5353C/TR12 Tags
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