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Microchip Technology 1N5352/TR12
- Part No.:
- 1N5352/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5352/TR12.pdf
- Description:
- DIODE ZENER 15V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,368
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Product details
Overview
1N5352/TR12 from Microsemi is a 15 V, ±5% tolerance, 5 W axial-leaded silicon Zener diode optimized for voltage regulation in power supply feedback loops, overvoltage protection circuits, and precision reference applications. 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 1N5352/TR12 datasheet, 1N5352/TR12 pinout, 1N5352/TR12 application, or 1N5352/TR12 equivalent, key selection criteria include its 15 V nominal Zener voltage, 5 W steady-state power rating at TL < 25°C, low 2.5 Ω impedance at 75 mA test current, and RoHS-compliant matte-tin plating compatible with standard reflow profiles.
Technical Context
This device functions as a two-terminal voltage reference by operating in reverse breakdown, maintaining stable output voltage across wide current (10–75 mA) and temperature (–65°C to +150°C) ranges. 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 1N5352/TR12 exhibits 0.25 V maximum voltage regulation (ΔVZ) between 10% and 50% of IZM, confirming tight regulation stability. Its 1.0 V maximum forward voltage at 1.0 A supports use in bidirectional clamping or dual-Zener configurations where forward conduction may occur during transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15 V ±5% - precise regulation point for 12–15 V system references |
| Power Dissipation (Pd) | 5.0 W at TL < 25°C - supports high-current regulation without external heatsink |
| Test Current (IZT) | 75 mA - defined operating point for guaranteed VZ and ZZ specifications |
| Dynamic Impedance (ZZ) | 2.5 Ω - low AC impedance ensures minimal output voltage variation under load changes |
| Max Reverse Current (IR) | 1.0 μA at VR = 10.8 V - confirms sharp knee and low leakage below regulation threshold |
| Surge Current (IZSM) | 6.3 A (8.3 ms half-sine) - withstands common transient overvoltage events |
| Thermal Resistance (RθJL) | 25 °C/W - enables direct lead-mount thermal path for efficient power handling |
Pinout & Package
Package: Axial-leaded T-18 plastic 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. Weight: 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased reference terminal | Connected to lower-potential node; accepts current into cathode during regulation |
| Cathode (banded end) | Zener voltage reference output | Provides stable 15 V relative to anode; must be held positive w.r.t. anode for operation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N53xxB series | Industry-standard footprint and electrical behavior for drop-in replacement across OEM designs |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies SMT assembly logistics and reduces handling cost |
| ESD robustness (MIL-STD-750 Method 1020) | Nonsensitive handling - eliminates need for ESD workstations during manual assembly |
| RoHS-compliant (e3 suffix) | Meets global environmental compliance without performance trade-offs |
| High surge current rating | 6.3 A peak (8.3 ms) - protects downstream circuitry from line transients without external TVS |
Applications
| Switching Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback or forward converter feedback networks using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Primary voltage reference establishing precise 15 V setpoint for error amplifier input. Use Value: 2.5 Ω dynamic impedance minimizes output voltage drift across 10–75 mA load variations, ensuring ±1% output regulation. |
Use Scenario: Clamps rail voltage during input surge or load dump in 12 V automotive or industrial DC systems. IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing excess energy above 15 V threshold. Use Value: 6.3 A surge rating handles 8.3 ms transients without degradation, eliminating need for parallel TVS devices. |
| Precision Reference Source | Signal-Level Voltage Clamp |
Use Scenario: Provides stable bias voltage for op-amp comparators, ADC references, or sensor excitation in industrial instrumentation. IC Role / Device Role / Timing Role: Low-drift, low-noise DC reference derived from reverse-biased Zener junction. Use Value: 0.25 V ΔVZ ensures consistent 15 V output across 7.5–37.5 mA operating range, enabling sub-0.5% system accuracy. |
Use Scenario: Limits analog signal swing to prevent ADC saturation or op-amp rail-to-rail clipping in data acquisition front-ends. IC Role / Device Role / Timing Role: Bidirectional clamp (forward 1.2 V / reverse 15 V) protecting sensitive inputs. Use Value: 1.2 V max forward voltage at 1.0 A ensures minimal forward conduction loss during negative transients. |
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 | No TR12 tape-and-reel packaging; bulk or ammo pack only | Lacks standardized reel format for automated pick-and-place | Select 1N5352B only for hand-soldered prototypes or low-volume repair |
| MMBZ5245B (ON Semiconductor) | Surface-mount SOT-23 package; 15 V ±5%, 0.5 W rating | Not suitable for 5 W power dissipation; limited to low-current biasing | Choose MMBZ5245B only for space-constrained PCBs where power < 0.5 W suffices |
Compared with 1N5352B and MMBZ5245B, the 1N5352/TR12 uniquely combines JEDEC-standard axial packaging, 5 W continuous power, and tape-and-reel readiness-making it optimal for high-reliability, medium-power industrial power supplies requiring automated assembly and thermal margin.
Availability
1N5352/TR12 is available at Aetrix Electronics and suitable for switching power supplies, overvoltage protection circuits, and precision reference designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for 1N5352/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 1N53xxB series was engineered for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal robustness, surge immunity, and JEDEC-standard interoperability across legacy and new designs.
FAQ
What is the Zener voltage tolerance for 1N5352/TR12?
The 1N5352/TR12 has a nominal Zener voltage of 15 V with a ±5% tolerance, as indicated by the "B" suffix in its full designation. This means the actual measured VZ at 75 mA and 25°C falls within 14.25 V to 15.75 V. The tolerance is guaranteed per JEDEC specification and verified during 100% production testing. This tolerance band ensures compatibility with feedback loop stability margins in standard 12 V and 15 V power supply designs using the 1N5352/TR12.
Can 1N5352/TR12 be used in surface-mount designs?
No, the 1N5352/TR12 is an axial-leaded T-18 package and is not compatible with surface-mount assembly processes. It requires through-hole mounting with 10 mm lead length from body for rated 5 W dissipation. For SMT equivalents, Microsemi offers the SMBJ5352B (DO-214AA) and SMBG5352B (DO-214AB), both rated at 5 W but with different thermal derating curves and pad layout requirements. The 1N5352/TR12 itself must be mounted in axial through-hole footprints.
What is the maximum surge current rating for 1N5352/TR12?
The 1N5352/TR12 is rated for a maximum non-recurrent surge current (IZSM) of 6.3 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating is validated per JEDEC test conditions and reflects the device's ability to absorb transient energy without parametric shift or failure. Engineers applying the 1N5352/TR12 in automotive load-dump or industrial surge environments should verify that system-level transients remain within this 6.3 A/8.3 ms envelope to ensure long-term reliability of the 1N5352/TR12.
Does 1N5352/TR12 require moisture preconditioning before reflow?
No, the 1N5352/TR12 carries IPC/JEDEC J-STD-020B Moisture Sensitivity Level 1 classification, meaning it is not moisture-sensitive and requires no dry pack or baking prior to soldering. Its void-free thermosetting epoxy body prevents moisture ingress, allowing direct placement into standard reflow profiles-including peak temperatures up to 260°C for 10 seconds-as specified in the official Microsemi datasheet for the 1N5352/TR12.
How does thermal resistance affect 1N5352/TR12 power handling?
The 1N5352/TR12 has a junction-to-lead thermal resistance (RθJL) of 25 °C/W when leads are trimmed to 10 mm from the body. This allows full 5 W dissipation at lead temperature < 25°C. On FR4 PCBs with 1 oz copper, RθJA rises to 85 °C/W, limiting steady-state power to ~1.47 W at 25°C ambient. Therefore, effective heat sinking via wide copper traces or chassis connection is essential when operating the 1N5352/TR12 near its 5 W rating to avoid exceeding the 150°C max junction temperature.
1N5352/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:
- ±20%
- 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
1N5352/TR12 FAQ
1.How can I place an order for 1N5352/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5352/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 1N5352/TR12 reliable?
The price and inventory of 1N5352/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5352/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5352/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5352/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5352/TR12?
1N5352/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5352/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 1N5352/TR12?
For technical support, including 1N5352/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5352/TR12 requirements.
6.How does Aetrix verify that 1N5352/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5352/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 1N5352/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5352/TR12?
All 1N5352/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5352/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 1N5352/TR12 part is unused and in its original packaging.
Return procedure for 1N5352/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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