My Inquiry
My Account
Microchip Technology 1N5372/TR12
- Part No.:
- 1N5372/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5372/TR12.pdf
- Description:
- DIODE ZENER 62V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:6,841
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5372/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 62 V, ±5% tolerance (B suffix), 20 mA test current, 42 Ω dynamic impedance at IZT, and 400 A surge current rating. It regulates voltage in power supply feedback loops, overvoltage protection circuits, and reference voltage generation where stable 62 V clamping is required.
For engineers reviewing the 1N5372/TR12 datasheet, 1N5372/TR12 pinout, 1N5372/TR12 application, or 1N5372/TR12 equivalent, this page delivers verified electrical specs, thermal derating behavior, JEDEC T-18 package details, and direct alternatives for 62 V/5 W Zener-based designs.
Technical Context
The 1N5372/TR12 operates as a reverse-biased voltage reference with sharp knee characteristics at 62 V, defined at 20 mA test current (IZT) and measured at 25 °C lead temperature. Its 42 Ω dynamic impedance (ZZ) ensures minimal voltage variation under load changes, while its 2.1 V maximum voltage regulation (ΔVZ) reflects stability between 10% and 50% of IZM.
Designed for axial-lead mounting on FR4 PCBs or with heat sinking at the lead, it delivers 5 W steady-state power at TL < 25 °C (3/8″ from body), derating linearly to 1.47 W at TA = 25 °C on standard 1 oz Cu board. Its cathode band polarity and RoHS-compliant matte-tin plating support automated assembly and reliability-critical applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 62 V ±5% - precise clamping threshold for 62 V reference or protection circuits |
| Test Current (IZT) | 20 mA - operating point where VZ and ZZ are specified; sets bias design point |
| Dynamic Impedance (ZZ) | 42 Ω - low AC resistance ensures tight regulation under varying load currents |
| Max Surge Current (IZSM) | 400 A (8.3 ms half-sine) - withstands transient overvoltage events without failure |
| Power Dissipation (Pd) | 5.0 W at TL < 25 °C - requires thermal management above ambient for full-power operation |
| Voltage Regulation (ΔVZ) | 2.1 V - difference between VZ at 10% and 50% of IZM; quantifies regulation linearity |
| Reverse Current (IR) | 0.5 μA @ 47.1 V - leakage remains negligible below regulation threshold |
| Thermal Resistance | 25 °C/W junction-to-lead (3/8″ lead length) - enables thermal modeling for heatsink design |
Pinout & Package
Package: JEDEC T-18 axial-leaded plastic encapsulated case (void-free UL94V-0 epoxy), 0.7 g weight, cathode indicated by colored band. Leads are tin-lead or RoHS-compliant matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage side in reverse-bias regulation | Connected to circuit ground or lower-potential node when used as shunt regulator |
| Cathode | Zener breakdown terminal / high-voltage side in reverse-bias regulation | Banded end; connected to input or protected rail; defines 62 V clamp reference point |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Guarantees mechanical and electrical interchangeability across qualified suppliers |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies handling and eliminates bake-out before assembly |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - safe for manual and automated handling without special precautions |
| High surge current capability | 400 A peak (8.3 ms) - protects downstream circuitry from lightning-induced or inductive-switching transients |
| Stable voltage vs. temperature | Operating range −65 °C to +150 °C - supports industrial and automotive under-hood environments |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Used in the optocoupler feedback path of an isolated DC-DC converter to regulate 62 V output. IC Role / Device Role / Timing Role: Shunt voltage reference defining output setpoint via TL431-like feedback loop. Use Value: 62 V ±5% tolerance and 42 Ω ZZ ensure ±1.5% output regulation across line/load/temperature. | Use Scenario: Placed across a 48 V telecom bus to clamp surges exceeding 62 V. IC Role / Device Role / Timing Role: Passive crowbar element diverting transient energy to ground during overvoltage events. Use Value: 400 A surge rating and 2.1 V ΔVZ limit clamped voltage to ≤64.1 V, protecting 75 V-rated MOSFETs. |
| Precision Reference Generator | Industrial Sensor Excitation |
Use Scenario: Provides stable 62 V excitation for high-voltage piezoresistive pressure sensors. IC Role / Device Role / Timing Role: Low-drift, low-noise DC reference source replacing active regulators in space-constrained modules. Use Value: 0.5 μA IR at 47.1 V ensures minimal loading error; 25 °C/W θJL enables passive thermal stabilization. | Use Scenario: Supplies regulated bias to strain-gauge bridge amplifiers in factory automation load cells. IC Role / Device Role / Timing Role: Fixed-voltage shunt regulator maintaining constant excitation despite supply ripple. Use Value: 2.1 V ΔVZ and 42 Ω ZZ suppress 120 Hz ripple to <50 mVpp, improving measurement SNR by >20 dB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5372B (bulk) | Same electrical specs, identical T-18 package, no tape-and-reel packaging | Not suitable for automated pick-and-place; requires manual or bulk-feed placement | Select 1N5372/TR12 for SMT line compatibility; choose 1N5372B only for hand-soldered prototypes or low-volume repair |
| MMSZ5262BT1G (ON Semiconductor) | Surface-mount SOD-123, 500 mW rating, 62 V ±5%, 100 Ω ZZ, 200 mA IZM | Limited to low-power signal-level references; cannot replace 1N5372/TR12 in 5 W power regulation | Use MMSZ5262BT1G only in space-constrained, low-current (<50 mA) applications; retain 1N5372/TR12 for power-stage clamping or high-current references |
Compared with 1N5372B and MMSZ5262BT1G, the 1N5372/TR12 uniquely combines 5 W power handling, axial-leaded manufacturability, and JEDEC-standardized 62 V regulation-making it irreplaceable in high-energy clamp and industrial reference designs requiring proven thermal robustness and tape-and-reel automation support.
Availability
1N5372/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and precision reference generators requiring stable component supply and long-term obsolescence mitigation.
Supply support for 1N5372/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 1N53xxB series was engineered for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal resilience, surge immunity, and JEDEC-standardized interchangeability across military and commercial applications.
FAQ
What is the Zener voltage tolerance of the 1N5372/TR12?
The 1N5372/TR12 has a Zener voltage tolerance of ±5%, indicated by the "B" suffix in its full designation. This means its actual regulation voltage falls within 58.9 V to 65.1 V at 20 mA test current and 25 °C lead temperature. The tolerance is guaranteed per JEDEC specification and applies across the full operating temperature range of −65 °C to +150 °C.
Can the 1N5372/TR12 be used in surface-mount designs?
No, the 1N5372/TR12 uses a through-hole axial-leaded T-18 package and is not compatible with surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5372B (DO-214AA) and SMBG5372B (DO-214AB), both rated at 5 W and sharing identical 62 V ±5% electrical specs. These require separate footprint and reflow profile validation.
What is the maximum continuous power dissipation for the 1N5372/TR12 on a standard PCB?
When mounted on a standard FR4 PCB with 1 oz copper, 4 mm² pads, and 1 mm × 25 mm traces, the 1N5372/TR12 is rated for 1.47 W at 25 °C ambient temperature. Its thermal resistance junction-to-ambient is 85 °C/W under those conditions, requiring derating by 15.7 mW/°C above 25 °C ambient to avoid exceeding the 150 °C max junction temperature.
Does the 1N5372/TR12 meet RoHS requirements?
Yes, the 1N5372/TR12 is RoHS compliant, as confirmed by the "e3" suffix in its full manufacturer part number (1N5372B e3). Its leads use annealed matte-tin plating instead of tin-lead, and its void-free epoxy body meets UL94V-0 flammability standards-both satisfying EU Directive 2011/65/EU and related exemptions.
How does the voltage regulation (ΔVZ) of the 1N5372/TR12 affect circuit accuracy?
The 1N5372/TR12 has a maximum voltage regulation (ΔVZ) of 2.1 V, defined as the difference between its Zener voltage measured at 10% and 50% of IZM (6.3 mA and 31.5 mA). This parameter directly limits regulation accuracy under varying load: for example, in a 62 V reference circuit drawing 20–30 mA, output drift due to ΔVZ alone will be ≤2.1 V, requiring external buffering or trimming for sub-1% precision.
1N5372/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:
- ±20%
- 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
1N5372/TR12 FAQ
1.How can I place an order for 1N5372/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5372/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 1N5372/TR12 reliable?
The price and inventory of 1N5372/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5372/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5372/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5372/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5372/TR12?
1N5372/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5372/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 1N5372/TR12?
For technical support, including 1N5372/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5372/TR12 requirements.
6.How does Aetrix verify that 1N5372/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5372/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 1N5372/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5372/TR12?
All 1N5372/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5372/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 1N5372/TR12 part is unused and in its original packaging.
Return procedure for 1N5372/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5372/TR12 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
