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Microchip Technology 1N5372A/TR12
- Part No.:
- 1N5372A/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5372A/TR12.pdf
- Description:
- DIODE ZENER 62V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:6,708
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Product details
Overview
1N5372A/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 62 V, ±10% tolerance (A suffix), 20 mA test current, 42 Ω dynamic impedance at IZT, and maximum reverse current of 0.5 μA at 47.1 V. It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5372A/TR12 datasheet, 1N5372A/TR12 pinout, 1N5372A/TR12 application, or 1N5372A/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (400 A), voltage regulation (ΔVZ = 2.1 V), and RoHS-compliant plating per MIL-STD-750.
Technical Context
This discrete Zener diode functions as a two-terminal voltage regulator in reverse-bias mode, maintaining stable output voltage across wide current variation (IZM = 400 mA at TL = 25 °C). Its low dynamic impedance (42 Ω) and tight ΔVZ (2.1 V) ensure minimal voltage drift under load changes.
Designed for axial-lead through-hole mounting on FR4 PCBs with 1 oz copper, it delivers 1.47 W steady-state power at TA = 25 °C using specified 4 mm² pads and 1 mm × 25 mm trace. Polarity is marked by cathode band; operation requires banded end positive relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 62 V ±10% - defines regulated output voltage under 20 mA test current |
| Power Dissipation | 5.0 W at TL = 25 °C - requires 10 mm lead length heat sinking for full rating |
| Dynamic Impedance (ZZ) | 42 Ω at IZT = 20 mA - determines voltage stability against current ripple |
| Max Reverse Current (IR) | 0.5 μA at VR = 47.1 V - ensures low leakage in standby regulation circuits |
| Surge Current (IZSM) | 400 A (8.3 ms half-sine) - supports transient overvoltage clamping without failure |
| Voltage Regulation (ΔVZ) | 2.1 V - difference between voltages measured at 10% and 50% of IZM |
| Thermal Resistance | 25 °C/W junction-to-lead - enables thermal design with standard lead-forming practices |
Pinout & Package
Package: Axial-leaded T-18 plastic case (Void-free UL94V-0 epoxy), cathode indicated by band, 0.7 g weight, RoHS-compliant matte-tin plating per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; referenced ground node in Zener regulation | Connected to lower-potential side of regulated circuit; forms return path for Zener current |
| Cathode | Current exit terminal in forward bias; high-side regulation node in reverse bias | Banded end must be held at higher potential; provides stable 62 V reference to load |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions and electrical behavior across global supply chain |
| Moisture sensitivity Level 1 | No dry pack required - simplifies handling and eliminates bake-out before assembly |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during manual or automated placement |
| High surge current capability | Withstands 400 A transient surges - suitable for input-stage clamping in AC/DC converters |
| Stable regulation over temperature | –65 °C to +150 °C operating range - supports under-hood and industrial control environments |
Applications
| Industrial Power Supply Reference | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Providing stable 62 V reference for feedback loop in 48 V telecom rectifier. IC Role / Device Role / Timing Role: Two-terminal voltage reference element setting error amplifier threshold. Use Value: ±10% tolerance and 2.1 V regulation ensure consistent output accuracy across line/load variations. | Use Scenario: Clamping transient spikes on DC bus in motor drive front-end. IC Role / Device Role / Timing Role: Shunt protector diverting surge energy above 62 V to ground. Use Value: 400 A surge rating and 25 °C/W thermal resistance prevent thermal runaway during repeated transients. |
| Programmable Voltage Monitor | Field Instrumentation Calibration |
Use Scenario: Setting trip point for undervoltage/overvoltage detection in PLC I/O module. IC Role / Device Role / Timing Role: Precision threshold detector enabling fault flag generation at 62 V ±10%. Use Value: Low 0.5 μA reverse leakage at 47.1 V minimizes false triggers in high-impedance sense networks. | Use Scenario: Calibrating 60 V range in portable multimeter reference divider network. IC Role / Device Role / Timing Role: Stable voltage source for ratio-metric ADC reference scaling. Use Value: 42 Ω dynamic impedance ensures <10 mV error shift across 5–400 mA operating current range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5372B/TR12 | ±5% tolerance (vs. ±10%), same VZ, IZT, ZZ, and package | Higher precision needed for feedback loops requiring tighter output regulation | Select when system VOUT stability demands <±3% total error budget |
| MMBZ5255BLT1G | Surface-mount SOT-23, 500 mW rating, 62 V ±5%, 100 Ω ZZ | Space-constrained PCBs where axial leads are incompatible with layout | Choose only if thermal derating to ≤0.5 W is acceptable and board area is premium |
Compared with 1N5372A/TR12, the 1N5372B/TR12 offers tighter voltage control but identical thermal and surge performance, while MMBZ5255BLT1G trades power handling and robustness for miniaturization - making it unsuitable for 5 W continuous dissipation requirements.
Availability
1N5372A/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, programmable voltage monitors, and field instrumentation calibration requiring stable component supply and long-term obsolescence management.
Supply support for 1N5372A/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 1N53xxA/B series was designed for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal robustness, surge resilience, and JEDEC-standardized manufacturability.
FAQ
What is the Zener voltage tolerance of the 1N5372A/TR12?
The 1N5372A/TR12 has a nominal Zener voltage of 62 V with a ±10% tolerance, as designated by the "A" suffix per Microsemi's documentation. This means the actual measured VZ falls between 55.8 V and 68.2 V at 20 mA test current and 25 °C lead temperature. The tolerance directly impacts regulation accuracy in feedback and protection circuits.
Does the 1N5372A/TR12 require dry packing before PCB assembly?
No, the 1N5372A/TR12 does not require dry packing. It carries IPC/JEDEC J-STD-020B moisture sensitivity Level 1 classification, meaning it can be stored and assembled without baking or humidity-controlled packaging. This simplifies logistics and eliminates pre-reflow bake cycles in manufacturing.
What is the maximum steady-state power dissipation of the 1N5372A/TR12 on a standard FR4 PCB?
The 1N5372A/TR12 delivers 1.47 W steady-state power when mounted on a standard FR4 PCB (1 oz copper) with 4 mm² copper pads and 1 mm × 25 mm trace, per Microsemi's thermal characterization. Full 5 W rating requires 3/8″ (10 mm) lead length heat sinking at TL = 25 °C.
How is polarity marked on the 1N5372A/TR12?
The 1N5372A/TR12 uses a cathode band to indicate polarity: the banded end is the cathode and must be held at a higher potential than the anode to operate in Zener breakdown mode. Forward voltage is rated at ≤1.2 V at 1.0 A, confirming standard silicon diode behavior in forward conduction.
Is the 1N5372A/TR12 RoHS compliant?
Yes, the 1N5372A/TR12 is RoHS compliant, as confirmed by the "e3" designation in Microsemi's official documentation. Its terminals feature annealed matte-tin plating compliant with RoHS Directive 2011/65/EU and solderable per MIL-STD-750 Method 2026.
1N5372A/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):
- 62 V
- Tolerance:
- ±10%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 42 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 44.6 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
1N5372A/TR12 FAQ
1.How can I place an order for 1N5372A/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5372A/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 1N5372A/TR12 reliable?
The price and inventory of 1N5372A/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5372A/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5372A/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5372A/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5372A/TR12?
1N5372A/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5372A/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 1N5372A/TR12?
For technical support, including 1N5372A/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5372A/TR12 requirements.
6.How does Aetrix verify that 1N5372A/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5372A/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 1N5372A/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5372A/TR12?
All 1N5372A/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5372A/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 1N5372A/TR12 part is unused and in its original packaging.
Return procedure for 1N5372A/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5372A/TR12 Tags
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