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Microchip Technology 1N5354C/TR12
- Part No.:
- 1N5354C/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5354C/TR12.pdf
- Description:
- DIODE ZENER 17V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:2,753
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Product details
Overview
1N5354C/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 17 V, ±2% tolerance (C suffix), 70 mA maximum Zener test current (IZT), 280 Ω maximum dynamic impedance (ZZ), and 5.8 A maximum Zener current (IZM) at 25°C with adequate heat sinking. It regulates voltage in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the 1N5354C/TR12 datasheet, 1N5354C/TR12 pinout, 1N5354C/TR12 application, or 1N5354C/TR12 equivalent, key selection criteria include its 17 V Zener voltage, ±2% tolerance, 5 W power rating, axial T-18 package, and compliance with MIL-PRF-19500 screening options when prefixed.
Technical Context
This device operates as a voltage reference and shunt regulator, maintaining stable output voltage across wide current (10–50% IZM) and temperature (−65°C to +150°C) ranges. Its low dynamic impedance (280 Ω max at IZT = 70 mA) ensures minimal voltage variation under load changes.
The 1N5354C/TR12 features a cathode band marking, tin-lead or RoHS-compliant matte-tin plating, and moisture sensitivity level 1 per J-STD-020B-no dry pack required. Thermal resistance is 25 °C/W junction-to-lead (3/8" lead length) and 85 °C/W junction-to-ambient on FR4.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 17 V ±2% - precise regulation point for feedback networks requiring tight voltage stability. |
| Power Dissipation (PD) | 5.0 W at TL = 25°C - supports high-current shunt regulation when mounted with 3/8" lead length heat sinking. |
| Zener Test Current (IZT) | 70 mA - operating point where VZ and dynamic impedance are specified; defines typical bias condition. |
| Dynamic Impedance (ZZ) | 280 Ω max - low AC impedance ensures minimal output voltage ripple under varying load currents. |
| Max Zener Current (IZM) | 5.8 A - peak DC current capability at 25°C with proper thermal management; determines surge handling capacity. |
| Voltage Regulation (ΔVZ) | 0.35 V max - difference between VZ measured at 10% and 50% of IZM; quantifies regulation linearity. |
| Reverse Leakage (IR) | 0.5 μA max at 12.9 V - negligible standby current in high-impedance sensing or reference paths. |
| Forward Voltage (VF) | 1.2 V max at 1.0 A - enables use as a clamp or series diode in dual-role protection circuits. |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free thermosetting epoxy, UL94V-0 rated), 0.7 g weight, cathode indicated by colored 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 | Current entry terminal in forward bias; connected to lower-potential node in Zener operation. | Used for forward conduction or as reference ground return in shunt configurations. |
| Cathode (banded end) | Current exit terminal in forward bias; connected to higher-potential node during Zener breakdown. | Must be held positive relative to anode to enable regulation; ties to regulated rail or error amplifier input. |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables accurate voltage setting without post-calibration in precision power supplies and analog references. |
| JEDEC-registered 1N53xxB series | Guarantees standardized electrical behavior, mechanical dimensions, and reliability across qualified suppliers. |
| Moisture sensitivity Level 1 | Eliminates baking requirements before PCB assembly-reduces manufacturing cost and process complexity. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Supports handling in standard production environments without special static control beyond baseline requirements. |
| RoHS-compliant option (e3 suffix) | Meets global environmental regulations while maintaining identical electrical and thermal performance. |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Integrated into optocoupler feedback loop of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Shunt voltage reference providing error signal to PWM controller via optocoupler. Use Value: 17 V ±2% regulation ensures ±1% output accuracy over line/load/temperature; 280 Ω ZZ minimizes feedback loop phase shift. | Use Scenario: Placed across sensitive IC inputs or bus lines to clamp transient overvoltages above 17 V. IC Role / Device Role / Timing Role: Passive crowbar element diverting surge energy to ground before downstream components exceed ratings. Use Value: 5.8 A IZM and 5 W rating absorb 8.3 ms surges up to 17 V × 5.8 A × 8.3 ms ≈ 0.82 J without failure. |
| Programmable Voltage Reference | Industrial Sensor Excitation |
Use Scenario: Paired with external resistors to generate stable bias voltages for op-amps or ADC references. IC Role / Device Role / Timing Role: Primary voltage source defining reference potential in ratiometric or compensated measurement circuits. Use Value: Low ΔVZ (0.35 V) and tight tolerance ensure reference drift < ±0.5% over operating current range. | Use Scenario: Supplies constant 17 V excitation to bridge-based pressure or strain sensors in harsh industrial environments. IC Role / Device Role / Timing Role: Stable current-source companion (with series resistor) delivering regulated sensor drive voltage. Use Value: −65°C to +150°C operating range and low thermal resistance (25 °C/W) maintain excitation stability across ambient extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5354B/TR12 | ±5% tolerance (B suffix) vs. ±2% (C); otherwise identical VZ, PD, IZM, and package. | Acceptable where tighter regulation not required; lower cost in high-volume consumer power supplies. | Select 1N5354B/TR12 if system-level calibration compensates for initial tolerance; choose 1N5354C/TR12 for uncalibrated precision rails. |
| MMSZ5246ET1G | Surface-mount SOD-123 package (200 mW), 15 V nominal, ±5%; not pin-compatible or power-equivalent. | Only suitable for low-power logic-level clamping or biasing-not for 5 W regulation or surge absorption. | Use MMSZ5246ET1G only in space-constrained, low-current designs; 1N5354C/TR12 remains necessary for axial-mount, high-power roles. |
Compared with 1N5354B/TR12, the 1N5354C/TR12 delivers tighter initial accuracy critical for open-loop regulation, while MMSZ5246ET1G offers footprint reduction at the expense of power handling and voltage precision-making it unsuitable as a direct functional replacement.
Availability
1N5354C/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 manufacturability.
Supply support for 1N5354C/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 timing solutions for aerospace, defense, and industrial markets.
The 1N53xx series was designed for robust, high-power voltage 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 1N5354C/TR12?
The 1N5354C/TR12 has a Zener voltage tolerance of ±2%, designated by the "C" suffix in its part number. This means its actual regulation voltage falls within 16.66 V to 17.34 V at 70 mA test current and 25°C lead temperature. The tolerance is guaranteed per JEDEC specification and verified during production testing.
Can the 1N5354C/TR12 be used in surface-mount designs?
No-the 1N5354C/TR12 is an axial-leaded T-18 package device and is not compatible with surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5354B series in DO-214AA (SMB) package, but those differ in power rating, thermal path, and mounting method. The 1N5354C/TR12 requires through-hole or axial mounting with ≥3/8" lead length for full 5 W dissipation.
What is the maximum surge current rating for the 1N5354C/TR12?
The 1N5354C/TR12 has a maximum non-recurrent surge current (IZSM) of 100 A, specified for an 8.3 ms half-sine waveform. This rating assumes proper PCB layout with adequate copper area and thermal relief. The surge capability is enabled by its 5 W power rating and low thermal resistance (25 °C/W junction-to-lead), allowing brief energy absorption without parametric shift or failure.
Does the 1N5354C/TR12 require moisture preconditioning before reflow?
No-the 1N5354C/TR12 has IPC/JEDEC moisture sensitivity level 1, meaning it may be stored and assembled indefinitely at ≤30°C/60% RH without baking or dry-pack requirements. Its void-free epoxy encapsulation and Level 1 classification eliminate moisture-related popcorning risk during standard lead-free reflow profiles.
How does the 1N5354C/TR12 compare to the 1N4742A in terms of regulation performance?
The 1N5354C/TR12 provides superior regulation performance versus the 1N4742A: it offers tighter ±2% tolerance (vs. ±5%), lower dynamic impedance (280 Ω vs. ~1000 Ω), higher power (5 W vs. 1 W), and better thermal resistance (25 °C/W vs. ~125 °C/W). These differences make the 1N5354C/TR12 suitable for high-current, high-stability applications where the 1N4742A would overheat or drift excessively.
1N5354C/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):
- 17 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 12.2 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
1N5354C/TR12 FAQ
1.How can I place an order for 1N5354C/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5354C/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 1N5354C/TR12 reliable?
The price and inventory of 1N5354C/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5354C/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5354C/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5354C/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5354C/TR12?
1N5354C/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5354C/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 1N5354C/TR12?
For technical support, including 1N5354C/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5354C/TR12 requirements.
6.How does Aetrix verify that 1N5354C/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5354C/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 1N5354C/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5354C/TR12?
All 1N5354C/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5354C/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 1N5354C/TR12 part is unused and in its original packaging.
Return procedure for 1N5354C/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5354C/TR12 Tags
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MM5Z5V1ST1G
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