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Microchip Technology 1N5372C/TR12
- Part No.:
- 1N5372C/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5372C/TR12.pdf
- Description:
- DIODE ZENER 62V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,589
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Product details
Overview
1N5372C/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 62 V, ±2% tolerance (C suffix), 20 mA test current (IZT), 42 Ω dynamic impedance (ZZ), and 400 mA maximum Zener current (IZM) when adequately heat-sunk. It operates across –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5372C/TR12 datasheet, 1N5372C/TR12 pinout, 1N5372C/TR12 application, or 1N5372C/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 matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator in reverse-bias mode, maintaining stable output voltage across wide current (10–50% IZM) and temperature ranges. Its low dynamic impedance (42 Ω at 20 mA) and tight ±2% voltage tolerance ensure minimal drift under load variation.
The 1N5372C/TR12 employs a void-free thermosetting epoxy T-18 package with cathode band polarity marking, rated for 5 W steady-state dissipation at TL < 25 °C (3/8″ lead length), and exhibits 76 Ω knee impedance (ZZK) at 1 mA - critical for low-current regulation stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 62 V ±2% - precise regulation point for 60–64 V reference applications |
| Test Current (IZT) | 20 mA - standardized bias point for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZ) | 42 Ω - low AC resistance ensures minimal voltage shift under varying load current |
| Max Zener Current (IZM) | 400 mA - maximum continuous DC current at 25 °C with adequate heat sinking |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables high-power operation with simple lead-based heatsinking |
| Voltage Regulation (ΔVZ) | 2.1 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
| Surge Current (IZSM) | 400 A - peak non-repetitive half-sine (8.3 ms) capability for transient overvoltage clamping |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-41 outline; void-free UL94V-0 epoxy body; 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 ground | Connected to circuit ground or lower-potential node; reverse-biased operation requires cathode at higher potential |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; connected to regulated rail; maintains 62 V relative to anode under reverse bias ≥ VR |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables high-accuracy voltage references without external trimming in analog power monitoring |
| Moisture sensitivity Level 1 (IPC/JEDEC J-STD-020B) | Eliminates dry-pack requirement and bake-out prior to PCB assembly |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-safe workstations during manual assembly |
| RoHS-compliant e3 marking | Meets EU Directive 2011/65/EU and supports environmentally compliant industrial product certifications |
| High surge current rating (400 A) | Provides robust transient suppression in 48 V telecom and industrial control input stages |
Applications
| Industrial Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Precision feedback path in isolated 48 V DC-DC converter secondary-side regulation. IC Role / Device Role / Timing Role: Zener diode providing stable 62 V reference for optocoupler-driven error amplifier. Use Value: ±2% tolerance ensures output voltage accuracy within ±0.5% across line/load/temperature, reducing need for post-assembly calibration. |
Use Scenario: Input-stage transient clamp on 60 V battery management system front-end. IC Role / Device Role / Timing Role: Shunt protector diverting surge energy above 62 V to ground before reaching downstream regulators. Use Value: 400 A surge rating handles ISO 7637-2 Pulse 5a transients without degradation, extending system reliability. |
| Programmable Logic Controller (PLC) I/O Protection | Analog Sensor Signal Conditioning |
Use Scenario: Reverse-polarity and overvoltage protection on 24 V digital input module terminals. IC Role / Device Role / Timing Role: Bidirectional clamp (with series diode) limiting input voltage to ±62 V during fault conditions. Use Value: Low 25 °C/W thermal resistance allows direct PCB copper pour heatsinking, eliminating discrete heatsinks in space-constrained modules. |
Use Scenario: Reference voltage source for 16-bit ADC in industrial temperature transmitter. IC Role / Device Role / Timing Role: Stable 62 V Zener supplying bias to precision voltage divider network feeding ADC reference input. Use Value: 76 Ω knee impedance at 1 mA ensures regulation remains stable even during low-power sleep modes, preserving measurement accuracy. |
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 (B suffix), same VZ nominal, identical package and thermal specs | Lower cost where ±5% regulation accuracy suffices (e.g., non-critical bias networks) | Select when tighter tolerance is unnecessary and BOM cost reduction is prioritized |
| MMSZ5255C-TP | Surface-mount SOD-123 package, 200 mW rating, 62 V ±2%, 100 mA IZM | Not suitable for 5 W power dissipation; limited to low-current reference use | Choose only for space-constrained PCBs where power demand is ≤200 mW and reflow compatibility is required |
Compared with 1N5372B/TR12, the 1N5372C/TR12 delivers higher accuracy for closed-loop feedback, while MMSZ5255C-TP offers footprint savings at the expense of thermal capacity - making 1N5372C/TR12 optimal for high-stability, medium-power industrial regulation where axial mounting and heat sinking are feasible.
Availability
1N5372C/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, PLC I/O modules, and battery management systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N5372C/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 1N5372C/TR12 belongs to Microsemi's legacy 5 W axial Zener family, engineered for rugged voltage regulation in harsh environments - emphasizing thermal robustness, surge resilience, and long-term parametric stability under extended temperature cycling.
FAQ
What is the Zener voltage tolerance of the 1N5372C/TR12?
The 1N5372C/TR12 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix per Microsemi's documentation. This means its actual regulation voltage falls within 60.76 V to 63.24 V at 20 mA test current and 25 °C lead temperature. This tight tolerance supports precision reference designs where ±5% variants like the 1N5372B/TR12 would introduce unacceptable error.
Can the 1N5372C/TR12 be used without a heatsink?
The 1N5372C/TR12 can operate at up to 1.47 W without a heatsink when mounted on FR4 with specified copper pads (4 mm²) and traces, per its 85 °C/W junction-to-ambient rating. For full 5 W dissipation, it requires lead temperature control below 25 °C - typically achieved via 3/8″ lead length heatsinking or chassis mounting. Operating near 5 W without thermal management risks exceeding 150 °C junction temperature.
Is the 1N5372C/TR12 RoHS compliant?
Yes, the 1N5372C/TR12 is RoHS compliant, confirmed by the "e3" suffix in Microsemi's official documentation and packaging. Its leads feature annealed matte-tin plating per MIL-STD-750 Method 2026, and the void-free epoxy body meets UL94V-0 flammability standards - satisfying EU Directive 2011/65/EU requirements for hazardous substance restrictions.
What is the maximum surge current rating for the 1N5372C/TR12?
The 1N5372C/TR12 has a maximum non-repetitive surge current (IZSM) rating of 400 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating enables reliable clamping of automotive load-dump or industrial switching transients. Derating applies for repeated surges; single-event capability remains intact per Microsemi's test conditions in the datasheet.
How does the voltage regulation (ΔVZ) specification impact circuit design?
The 1N5372C/TR12 specifies ΔVZ = 2.1 V - the difference between Zener voltage measured at 10% and 50% of IZM (i.e., 40 mA and 200 mA). This parameter quantifies regulation linearity: a lower ΔVZ indicates flatter VZ vs. IZ curve, reducing output variation in current-source-driven references. Designers use this to size series resistors and predict worst-case voltage drift across operating current range.
1N5372C/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:
- ±2%
- 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
1N5372C/TR12 FAQ
1.How can I place an order for 1N5372C/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5372C/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 1N5372C/TR12 reliable?
The price and inventory of 1N5372C/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5372C/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5372C/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5372C/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5372C/TR12?
1N5372C/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5372C/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 1N5372C/TR12?
For technical support, including 1N5372C/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5372C/TR12 requirements.
6.How does Aetrix verify that 1N5372C/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5372C/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 1N5372C/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5372C/TR12?
All 1N5372C/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5372C/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 1N5372C/TR12 part is unused and in its original packaging.
Return procedure for 1N5372C/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5372C/TR12 Tags
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