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Microchip Technology 1N5353A/TR12
- Part No.:
- 1N5353A/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5353A/TR12.pdf
- Description:
- DIODE ZENER 16V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:2,858
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Product details
Overview
1N5353A/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 16 V, ±10% tolerance (A suffix), 75 mA maximum Zener test current (IZT), 2.5 Ω maximum dynamic impedance (ZZ), and 6.0 V maximum voltage regulation (ΔVZ) across 10–50% of IZM. It regulates voltage in power supply reference and overvoltage protection circuits operating from –65 °C to +150 °C.
For engineers reviewing the 1N5353A/TR12 datasheet, 1N5353A/TR12 pinout, 1N5353A/TR12 application, or 1N5353A/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (75 A), reverse leakage at VR = 11.5 V (≤1.0 µA), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its 25 °C/W junction-to-lead thermal resistance enables 5 W steady-state dissipation when leads are held at ≤25 °C at 10 mm from body, while its 85 °C/W junction-to-ambient rating applies to FR4 PCB mounting with defined copper pad geometry.
The device exhibits 2.5 Ω maximum dynamic impedance at IZT = 75 mA and 6.0 V maximum voltage regulation (ΔVZ) between 10% and 50% of IZM. Reverse leakage is specified at VR = 11.5 V (≤1.0 µA), and forward voltage is ≤1.2 V at 1.0 A, confirming standard silicon PN junction behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16 V nominal, ±10% tolerance - defines regulation setpoint for feedback references and clamp thresholds. |
| Power Dissipation (Pd) | 5.0 W at TL = 25 °C - requires heatsinking or lead length control to sustain full rating. |
| Zener Test Current (IZT) | 75 mA - operating point where VZ and ZZ are guaranteed; used for calibration and test setup. |
| Dynamic Impedance (ZZ) | 2.5 Ω max at IZT - determines output impedance and regulation sensitivity to current changes. |
| Voltage Regulation (ΔVZ) | 6.0 V max - variation between voltages measured at 10% and 50% of IZM, indicating line regulation stability. |
| Surge Current (IZSM) | 75 A peak (8.3 ms half-sine) - supports transient overvoltage clamping without failure. |
| Reverse Leakage (IR) | ≤1.0 µA at VR = 11.5 V - ensures low standby power loss in high-impedance bias networks. |
Pinout & Package
Package: Axial-leaded T-18 plastic case (Void-free UL94V-0 epoxy), cathode indicated by band; leads plated with RoHS-compliant matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node; reverse-biased operation places cathode at higher potential. |
| Cathode | Zener breakdown terminal / regulation output | Banded end; connected to regulated rail; voltage referenced to anode during breakdown. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener series | Ensures standardized mechanical dimensions, marking, and electrical test methodology across suppliers. |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies handling and eliminates bake-out before assembly. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Enables safe manual handling and board-level assembly without special ESD controls. |
| High surge current capability (75 A) | Provides robust transient suppression in industrial power rails and automotive load-dump scenarios. |
| Low thermal resistance (25 °C/W junction-to-lead) | Allows full 5 W dissipation with minimal lead-length heatsinking - no PCB copper pour needed for basic use. |
Applications
| DC Power Supply Reference | Overvoltage Clamp Circuit |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete transistor-based regulators. IC Role / Device Role / Timing Role: Voltage reference element defining output setpoint via resistive divider. Use Value: Maintains ±10% regulation accuracy across –65 °C to +150 °C and 10–50% IZM, enabling reliable output tracking. |
Use Scenario: Protecting downstream circuitry from input surges exceeding 16 V threshold. IC Role / Device Role / Timing Role: Shunt clamping device diverting excess current to ground when input exceeds VZ. Use Value: Withstands 75 A 8.3 ms surge without degradation, preserving system integrity during load dump or inductive kick events. |
| Industrial Sensor Bias Network | Programmable Threshold Detector |
Use Scenario: Providing stable excitation voltage to precision analog sensors in factory automation systems. IC Role / Device Role / Timing Role: Low-drift DC bias source for bridge transducers or RTD interfaces. Use Value: Delivers <1.0 µA leakage at 11.5 V, minimizing error contribution in high-impedance sensor signal chains. |
Use Scenario: Setting trip point for comparator-based fault detection in motor drives or battery management. IC Role / Device Role / Timing Role: Precision voltage threshold generator referenced to system ground. Use Value: Enables repeatable 16 V trigger level with 6.0 V ΔVZ margin, supporting deterministic overvoltage response timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5353B | ±5% VZ tolerance (vs. ±10% for 1N5353A/TR12); identical VZ nominal, IZT, ZZ, and package. | Higher precision required in feedback loops where tighter regulation spread is critical. | Select 1N5353B when ±5% tolerance is mandated; otherwise 1N5353A/TR12 offers cost-effective performance for general-purpose clamping. |
| MMBZ5245BS | Surface-mount SOD-123 package; 16 V ±5%, 200 mW rating (vs. 5 W axial); 15 Ω ZZ. | Used in space-constrained, low-power portable electronics - not suitable for high-current regulation. | Choose MMBZ5245BS only for PCB area-limited designs with <50 mA load; 1N5353A/TR12 remains necessary for >100 mA or surge-prone environments. |
Compared with 1N5353B and MMBZ5245BS, the 1N5353A/TR12 delivers superior thermal handling (5 W vs. 0.2 W), higher surge immunity (75 A vs. ~1 A), and axial-leaded mechanical robustness - making it the preferred choice for industrial power conditioning where reliability under thermal and transient stress is paramount.
Availability
1N5353A/TR12 is available at Aetrix Electronics and suitable for DC power supply reference, overvoltage clamp circuit, and industrial sensor bias network applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1N5353A/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 1N53xxA/B series belongs to Microsemi's legacy silicon Zener diode product line, engineered for ruggedized voltage regulation in harsh-environment power systems where thermal stability, surge resilience, and JEDEC-standard consistency are essential.
FAQ
What is the Zener voltage tolerance for 1N5353A/TR12?
The "A" suffix in 1N5353A/TR12 specifies a ±10% Zener voltage tolerance, meaning the actual regulation voltage falls between 14.4 V and 17.6 V at 75 mA test current and 25 °C lead temperature. This tolerance is confirmed in the manufacturer's Electrical Characteristics table and applies across the full operating temperature range of –65 °C to +150 °C. The 1N5353A/TR12 datasheet explicitly lists this tolerance in Note 1.
Does 1N5353A/TR12 require dry packing before PCB assembly?
No, the 1N5353A/TR12 has IPC/JEDEC J-STD-020B Moisture Sensitivity Level 1 classification, which means it is not moisture-sensitive and does not require dry packing or baking prior to reflow soldering. Its void-free thermosetting epoxy body and matte-tin plating ensure compatibility with standard assembly processes, including 260 °C for 10 seconds per MIL-STD-750.
What is the maximum surge current rating for 1N5353A/TR12?
The 1N5353A/TR12 is rated for a maximum non-recurrent surge current (IZSM) of 75 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating is verified under the conditions specified in Microsemi's datasheet Note 5 and enables the 1N5353A/TR12 to absorb transient energy in industrial power rails without parametric shift or catastrophic failure.
How is thermal performance specified for 1N5353A/TR12?
Thermal performance for the 1N5353A/TR12 is specified as 25 °C/W junction-to-lead (at 10 mm lead length) and 85 °C/W junction-to-ambient (on FR4 with 4 mm² copper pads). These values define two distinct derating paths: full 5 W operation requires lead temperature ≤25 °C, while PCB-mounted operation drops to 1.47 W at 25 °C ambient - both values appear in the Maximum Ratings table of the official 1N5353A/TR12 datasheet.
Is 1N5353A/TR12 RoHS compliant?
Yes, the "e3" designation in the full part number (1N5353A/TR12 e3) confirms RoHS compliance per EU Directive 2011/65/EU. The device uses RoHS-compliant annealed matte-tin plating on leads and meets UL94V-0 flammability requirements for its epoxy body. This compliance is documented in the Features section and Mechanical and Packaging table of the 1N5353A/TR12 datasheet.
1N5353A/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:
- ±10%
- 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
1N5353A/TR12 FAQ
1.How can I place an order for 1N5353A/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5353A/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 1N5353A/TR12 reliable?
The price and inventory of 1N5353A/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5353A/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5353A/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5353A/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5353A/TR12?
1N5353A/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5353A/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 1N5353A/TR12?
For technical support, including 1N5353A/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5353A/TR12 requirements.
6.How does Aetrix verify that 1N5353A/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5353A/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 1N5353A/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5353A/TR12?
All 1N5353A/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5353A/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 1N5353A/TR12 part is unused and in its original packaging.
Return procedure for 1N5353A/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5353A/TR12 Tags
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MM5Z5V1ST1G
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