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Microchip Technology 1N5352C/TR12
- Part No.:
- 1N5352C/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5352C/TR12.pdf
- Description:
- DIODE ZENER 15V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:2,485
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Product details
Overview
1N5352C/TR12 from Microsemi is a 15 V, ±2% tolerance, 5 W axial-leaded silicon Zener diode optimized for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation. It delivers 75 mA maximum Zener current (IZM) at 25°C with 2.5 Ω dynamic impedance (ZZ) and operates across –65°C to +150°C.
For engineers reviewing the 1N5352C/TR12 datasheet, 1N5352C/TR12 pinout, 1N5352C/TR12 application, or 1N5352C/TR12 equivalent, key selection criteria include its tight ±2% VZ tolerance, low 2.5 Ω impedance at 75 mA test current, 0.25 V voltage regulation (ΔVZ), and RoHS-compliant matte-tin lead plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal shunt regulator, maintaining stable 15 V output by conducting reverse current above its breakdown threshold. Its 25 °C/W junction-to-lead thermal resistance enables reliable 5 W operation with minimal heatsinking when leads are trimmed to 10 mm from body.
It exhibits low dynamic impedance (2.5 Ω) and minimal voltage regulation drift (0.25 V between 10% and 50% IZM), ensuring consistent regulation under varying load currents. The cathode band marking and axial T-18 package support manual or automated through-hole assembly on FR4 PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15 V ±2% - precise reference voltage for feedback networks requiring tight tolerance |
| Test Current (IZT) | 75 mA - operating point where VZ and ZZ are specified; defines nominal regulation condition |
| Dynamic Impedance (ZZ) | 2.5 Ω - low AC resistance ensures minimal output voltage variation under changing load current |
| Max Regulator Current (IZM) | 6.3 A - peak DC current capability with adequate heat sinking at TL = 25°C |
| Voltage Regulation (ΔVZ) | 0.25 V - difference between VZ measured at 10% and 50% of IZM; quantifies regulation linearity |
| Power Dissipation | 5.0 W at TL < 25°C - steady-state power handling with 3/8″ lead length; derates linearly above 25°C |
| Operating Temperature | –65°C to +150°C - wide range supports industrial, automotive, and aerospace environments |
Pinout & Package
Package: Axial-leaded T-18 plastic case per JEDEC DO-201AD; void-free UL94V-0 epoxy body; cathode indicated by colored band; weight 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or common return; reverse-biased operation requires cathode at higher potential |
| Cathode | Regulated output node | Banded end; connected to regulated rail or error amplifier input; carries full Zener current during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables high-accuracy voltage references without external trimming in feedback or sensing paths |
| Low 2.5 Ω dynamic impedance at 75 mA | Minimizes output voltage deviation under dynamic load transients in switching power supplies |
| RoHS-compliant matte-tin plating | Ensures solderability per MIL-STD-750 Method 2026 and compatibility with lead-free reflow processes |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for manufacturing logistics |
| 25 °C/W junction-to-lead thermal resistance | Supports full 5 W dissipation with simple lead-length thermal management-no PCB copper pour needed |
Applications
| Switching Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Used in the optocoupler feedback path of an isolated flyback converter to regulate 12 V output. IC Role / Device Role / Timing Role: Shunt reference providing stable 15 V reference to TL431-like error amplifier input. Use Value: ±2% VZ tolerance and 0.25 V ΔVZ ensure output stays within ±1% over line/load/temperature. |
Use Scenario: Placed across a 12 V rail to clamp transient spikes exceeding 15.3 V (VZ max). IC Role / Device Role / Timing Role: Passive crowbar element diverting surge current away from downstream ICs during ESD or load dump. Use Value: 6.3 A IZM and 20 A surge rating (IZSM) absorb 8.3 ms half-sine surges without failure. |
| Programmable Reference Voltage Source | Industrial Sensor Excitation |
Use Scenario: Paired with precision resistors to generate adjustable 5–10 V references for ADC biasing. IC Role / Device Role / Timing Role: Primary voltage reference in resistor-divider networks for analog front-end calibration. Use Value: Low 2.5 Ω ZZ minimizes loading error when driving high-impedance op-amp inputs. |
Use Scenario: Supplies stable excitation voltage to strain gauge bridges in load cell signal conditioning. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage source replacing active regulators where simplicity and reliability are critical. Use Value: –65°C to +150°C operating range and low ΔVZ ensure bridge excitation stability across harsh environmental cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5352B/TR12 | ±5% VZ tolerance (vs. ±2%); identical VZ nominal, IZT, ZZ, and package | Acceptable where cost sensitivity outweighs precision; less suitable for closed-loop feedback | Select for non-critical clamping or coarse reference where tighter tolerance is unnecessary |
| MMBZ5245BS-7-F | Surface-mount SOD-123 package; 15 V ±5%; 200 mW Pd; 10 mA IZT; 17 Ω ZZ | Limited to low-power signal-level regulation; unsuitable for >100 mA load current or power dissipation | Choose only for space-constrained PCBs with sub-100 mW regulation needs-not a functional replacement |
Compared with 1N5352B/TR12 and MMBZ5245BS-7-F, the 1N5352C/TR12 uniquely combines ±2% tolerance, 5 W power handling, and axial T-18 robustness-making it the sole option for precision, high-current, through-hole Zener regulation in industrial power systems.
Availability
1N5352C/TR12 is available at Aetrix Electronics and suitable for switching power supply feedback, overvoltage protection clamps, and programmable reference voltage sources requiring stable component supply and long-term obsolescence mitigation.
Supply support for 1N5352C/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N53xx series was designed specifically for ruggedized, high-power Zener regulation in mission-critical power systems where thermal stability, surge resilience, and long-term parametric consistency are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N5352C/TR12?
The 1N5352C/TR12 has a Zener voltage tolerance of ±2%, as indicated by the "C" suffix per Microsemi's documentation. This means its nominal 15 V Zener voltage falls within 14.7 V to 15.3 V at 25°C with 75 mA test current. This tight tolerance makes the 1N5352C/TR12 suitable for precision reference applications where standard ±5% parts would introduce unacceptable error.
Can the 1N5352C/TR12 be used in surface-mount designs?
No-the 1N5352C/TR12 uses an axial-leaded T-18 (DO-201AD) package and is not compatible with surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5352B series, but those differ in power rating, thermal performance, and footprint. The 1N5352C/TR12 must be mounted through-hole with 10 mm lead length for rated 5 W operation.
What is the maximum surge current rating for the 1N5352C/TR12?
The 1N5352C/TR12 has a maximum non-recurrent surge current (IZSM) of 20 A for an 8.3 ms half-sine waveform, as specified in the Microsemi datasheet. This rating reflects its ability to absorb transient energy without degradation, making it appropriate for overvoltage protection in automotive and industrial power rails subject to load dump or ESD events.
How does the thermal resistance of the 1N5352C/TR12 affect its power handling?
The 1N5352C/TR12 has a junction-to-lead thermal resistance of 25 °C/W when leads are trimmed to 3/8″ (10 mm) from the body. This allows full 5 W dissipation at 25°C lead temperature. On FR4 PCBs with standard copper pads, junction-to-ambient resistance rises to 85 °C/W, limiting steady-state power to ~1.47 W unless additional copper area or forced cooling is applied.
Is the 1N5352C/TR12 RoHS compliant?
Yes-the "e3" designation in Microsemi's official documentation confirms the 1N5352C/TR12 is RoHS compliant, with annealed matte-tin lead plating meeting J-STD-609A Class 3 requirements. The "TR12" suffix indicates tape-and-reel packaging per EIA-296, and no lead-free conversion steps are required for compliance.
1N5352C/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):
- 15 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 10.8 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
1N5352C/TR12 FAQ
1.How can I place an order for 1N5352C/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5352C/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 1N5352C/TR12 reliable?
The price and inventory of 1N5352C/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5352C/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5352C/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5352C/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5352C/TR12?
1N5352C/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5352C/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 1N5352C/TR12?
For technical support, including 1N5352C/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5352C/TR12 requirements.
6.How does Aetrix verify that 1N5352C/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5352C/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 1N5352C/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5352C/TR12?
All 1N5352C/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5352C/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 1N5352C/TR12 part is unused and in its original packaging.
Return procedure for 1N5352C/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5352C/TR12 Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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