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Microchip Technology 1N5352A/TR12
- Part No.:
- 1N5352A/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5352A/TR12.pdf
- Description:
- DIODE ZENER 15V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:9,801
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Product details
Overview
1N5352A/TR12 from Microsemi is a 15 V, ±10% tolerance, 5 W axial-leaded silicon Zener diode optimized for voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation. It delivers stable regulation at 75 mA test current with 2.5 Ω dynamic impedance and supports up to 6.3 A maximum Zener current when adequately heat-sunk.
For engineers reviewing the 1N5352A/TR12 datasheet, 1N5352A/TR12 pinout, 1N5352A/TR12 application, or 1N5352A/TR12 equivalent, this page provides verified electrical parameters, thermal derating behavior, JEDEC T-18 package details, and validated alternative parts for industrial power management designs.
Technical Context
This Zener operates in reverse breakdown mode with cathode-banded polarity, requiring the banded end to be held positive relative to the anode. Its 25 °C/W junction-to-lead thermal resistance enables high-current operation (up to 6.3 A) only when mounted with ≥10 mm lead length from body and adequate heat sinking.
Regulation performance is defined by voltage regulation ΔVZ = 0.25 V (difference between voltages at 10% and 50% of IZM), and dynamic knee impedance ZZK = 0.25 Ω @ 1.0 mA - confirming sharp knee characteristics suitable for precision reference use within its 15 V ±10% tolerance band.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15 V ±10% - defines nominal regulation point; actual range 13.5–16.5 V at 75 mA test current |
| Test Current (IZT) | 75 mA - standard bias point where VZ and ZZ are specified; ensures stable operating point in feedback networks |
| Dynamic Impedance (ZZ) | 2.5 Ω - low AC resistance at IZT; minimizes output voltage variation under load transients |
| Max Regulator Current (IZM) | 6.3 A - maximum DC current before thermal runaway; requires heatsinking per 25 °C/W rating |
| Reverse Current (IR) | 1.0 μA @ 10.8 V - leakage threshold defining minimum regulation voltage; confirms tight turn-on behavior |
| Voltage Regulation (ΔVZ) | 0.25 V - difference between VZ measured at 10% and 50% of IZM; quantifies regulation linearity |
| Surge Current (IZSM) | 6.3 A - peak non-repetitive 8.3 ms half-sine surge capability; supports transient overvoltage clamping |
| Power Dissipation | 5.0 W @ TL < 25°C (3/8″ lead length); derates linearly above 25°C per Figure 1 curve |
Pinout & Package
Package: JEDEC T-18 axial-leaded plastic encapsulated case (void-free UL94V-0 epoxy), cathode indicated by 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 | Reference ground node | Connected to circuit common; reverse-biased operation requires cathode > anode |
| Cathode | Regulated output node | Banded end; held at stable 13.5–16.5 V relative to anode during conduction |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xxB family mechanical and electrical definitions |
| Moisture Sensitivity Level 1 | No dry pack required; safe for standard SMT reflow or hand-soldering without baking |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020; no special handling needed in assembly |
| High surge current rating | 6.3 A non-repetitive 8.3 ms half-sine capability supports robust overvoltage protection |
| Low thermal resistance | 25 °C/W junction-to-lead enables high-power operation with simple lead-length heatsinking |
Applications
| Switch-Mode Power Supply Feedback | DC-DC Converter Reference |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated flyback converter to regulate 12 V output. IC Role / Device Role / Timing Role: Zener reference sets error amplifier threshold; maintains ±3% output accuracy across line/load/temperature. Use Value: 15 V ±10% tolerance and 2.5 Ω dynamic impedance ensure stable loop gain and minimal output drift under 50–100 kHz switching noise. |
Use Scenario: Provides precise 15 V reference for TL431-based adjustable buck regulator controlling FPGA core voltage. IC Role / Device Role / Timing Role: Supplies stable bias to TL431's reference input; enables accurate 0.8–3.3 V output programming. Use Value: Low 0.25 V voltage regulation (ΔVZ) and 0.25 Ω knee impedance maintain reference stability across 10–100 mA load variations. |
| Overvoltage Clamp Protection | Industrial Sensor Excitation |
Use Scenario: Placed across 24 V rail input to PLC I/O module to clamp surges exceeding 28 V. IC Role / Device Role / Timing Role: Shunts excess energy during lightning-induced transients; protects downstream op-amps and ADCs. Use Value: 6.3 A surge current rating and 25 °C/W thermal resistance allow single-device clamping without external heatsink. |
Use Scenario: Supplies regulated 15 V excitation to strain-gauge bridge in load-cell interface circuit. IC Role / Device Role / Timing Role: Acts as low-noise, low-drift voltage source; referenced directly to instrumentation amplifier inputs. Use Value: 1.0 μA reverse leakage at 10.8 V prevents measurement offset; 0.25 V ΔVZ limits bridge excitation error to <0.2% FS. |
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 | Same 15 V nominal, but ±5% tolerance (14.25–15.75 V) vs. 1N5352A/TR12's ±10% (13.5–16.5 V); identical IZT, ZZ, IZM, and package | Preferred where tighter regulation is required; not drop-in if design relies on wider tolerance margin for thermal drift compensation | Select 1N5352B when reference accuracy dominates over cost or tolerance margin; verify loop stability with reduced VZ spread |
| 1N5352C | Same 15 V nominal, ±2% tolerance (14.7–15.3 V); otherwise identical electrical specs and T-18 package | Suitable for high-precision references (e.g., calibration equipment); higher cost and longer lead time than A-suffix part | Choose 1N5352C only when system-level accuracy demands sub-1% VZ deviation; confirm thermal derating remains sufficient at tighter VZ |
Compared with 1N5352A/TR12, the B-suffix variant offers improved tolerance without changing layout or thermal design, while the C-suffix version further tightens regulation at the cost of availability and price - making the A-suffix optimal for cost-sensitive industrial power rails where ±10% is acceptable.
Availability
1N5352A/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and sensor excitation systems requiring stable component supply with tape-and-reel packaging for automated assembly.
Supply support for 1N5352A/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, RF, and power management components 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 robustness, surge resilience, and JEDEC-standardized form factor for legacy compatibility.
FAQ
What is the Zener voltage tolerance of the 1N5352A/TR12?
The 1N5352A/TR12 has a nominal Zener voltage of 15 V with a ±10% tolerance, meaning its actual regulation voltage falls between 13.5 V and 16.5 V when tested at 75 mA and 25 °C. This tolerance is designated by the "A" suffix per Microsemi's documentation and applies across the full operating temperature range of –65 °C to +150 °C.
Can the 1N5352A/TR12 be used without a heatsink?
The 1N5352A/TR12 can dissipate up to 5.0 W only when the lead temperature (TL) is maintained below 25 °C - typically requiring ≥10 mm lead length from the body and ambient airflow or board copper area. Without heatsinking, its steady-state power drops to 1.47 W on FR4 PCB per Microsemi's thermal data, so sustained 5 W operation mandates external thermal management.
What does the "TR12" suffix mean in 1N5352A/TR12?
The "TR12" suffix indicates tape-and-reel packaging per EIA-296 standard, with 12,000 units per reel. This format is optimized for automated pick-and-place assembly. The base device remains electrically and mechanically identical to the bulk-packaged 1N5352A; only the packaging method differs.
How does the 1N5352A/TR12 compare to the 1N4744A?
The 1N5352A/TR12 (15 V, 5 W) and 1N4744A (14 V, 1 W) differ significantly in power rating, thermal design, and regulation precision. The 1N5352A/TR12 supports 6.3 A max current with 25 °C/W thermal resistance, while the 1N4744A is limited to 0.091 A and 100 °C/W - making them non-interchangeable without board-level redesign and thermal validation.
Is the 1N5352A/TR12 RoHS compliant?
Yes, the 1N5352A/TR12 is RoHS compliant, as confirmed by the "e3" designation in Microsemi's official documentation and product markings. Its leads use annealed matte-tin plating instead of tin-lead, meeting EU Directive 2011/65/EU requirements without exemption.
1N5352A/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:
- ±10%
- 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
1N5352A/TR12 FAQ
1.How can I place an order for 1N5352A/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5352A/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 1N5352A/TR12 reliable?
The price and inventory of 1N5352A/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5352A/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5352A/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5352A/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5352A/TR12?
1N5352A/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5352A/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 1N5352A/TR12?
For technical support, including 1N5352A/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5352A/TR12 requirements.
6.How does Aetrix verify that 1N5352A/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5352A/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 1N5352A/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5352A/TR12?
All 1N5352A/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5352A/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 1N5352A/TR12 part is unused and in its original packaging.
Return procedure for 1N5352A/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5352A/TR12 Tags
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MMSZ4682T1G
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MM5Z5V1ST1G
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