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Microchip Technology 1N5372B/TR8
- Part No.:
- 1N5372B/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5372B/TR8.pdf
- Description:
- DIODE ZENER 62V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,142
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Product details
Overview
1N5372B/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 62 V, ±5% tolerance (B suffix), 20 mA test current (IZT), 42 Ω maximum dynamic impedance (ZZ), and 400 A peak surge current (IZSM). 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 1N5372B/TR8 datasheet, 1N5372B/TR8 pinout, 1N5372B/TR8 application, or 1N5372B/TR8 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), steady-state power rating (5 W at TL < 25 °C), reverse leakage (<0.5 µA at 47.1 V), and RoHS-compliant matte-tin plating.
Technical Context
This device functions as a two-terminal voltage regulator in reverse-biased mode, maintaining stable output voltage across wide current variation (IZM = 400 mA at 62 V). Its low dynamic impedance (42 Ω) ensures minimal voltage deviation under load transients, while its 25 °C/W thermal resistance enables reliable operation with standard lead-length heat sinking.
The 1N5372B/TR8 features cathode band polarity marking, UL94V-0 void-free epoxy encapsulation, and moisture sensitivity level 1-no dry pack required. It meets MIL-PRF-19500 screening options when prefixed (e.g., MQ1N5372B) and supports tape-and-reel packaging via TR8 suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 62 V ±5% - precise regulation point for 47–76 V input ranges |
| Test Current (IZT) | 20 mA - operating point where VZ and ZZ are specified |
| Max Dynamic Impedance (ZZ) | 42 Ω - low AC impedance ensures stable regulation under varying load |
| Max Surge Current (IZSM) | 400 A (8.3 ms half-sine) - withstands transient overvoltage events |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables 5 W dissipation with 3/8″ lead length heat sinking |
| Reverse Leakage (IR) | <0.5 µA at 47.1 V - negligible standby current in high-impedance bias networks |
| Operating Temp Range | –65 °C to +150 °C - suitable for under-hood automotive and industrial environments |
Pinout & Package
Package: Axial-leaded T-18 plastic case (JEDEC DO-201AD), void-free UL94V-0 epoxy body, tin-lead or RoHS-compliant matte-tin plated leads, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage side | Connected to circuit ground or lower potential node in reverse-bias regulation |
| Cathode | Zener breakdown terminal / regulated output side | Banded end; connected to unregulated rail; delivers stable 62 V reference when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance (B suffix) | Enables tighter regulation than ±10% (A) or ±20% (no suffix) variants without premium cost |
| Moisture Sensitivity Level 1 | No dry pack or baking required before PCB assembly-reduces manufacturing overhead |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during board assembly and testing |
| RoHS-compliant option (e3 suffix) | Meets global environmental compliance without performance trade-off |
| Tape-and-reel packaging (TR8) | Supports automated SMT placement despite axial-leaded form factor |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing feedback reference in 48 V telecom rectifier modules with wide line/load variation. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing error signal to PWM controller. Use Value: Maintains ±1.5% output accuracy over –40 °C to +85 °C due to low ΔVZ (2.1 V) and stable VZ temperature coefficient. | Use Scenario: Clamping transient spikes on 60 V DC bus in motor drive inverters. IC Role / Device Role / Timing Role: Passive crowbar element absorbing 400 A surge energy without failure. Use Value: Survives repeated 8.3 ms surges up to 400 A thanks to robust 5 W power rating and low RθJL. |
| Programmable Logic Controller I/O Protection | Test Equipment Reference Source |
Use Scenario: Protecting 24–60 V digital input channels against field-wiring faults and inductive kickback. IC Role / Device Role / Timing Role: Reverse-biased clamp limiting voltage to 62 V ±5% during fault conditions. Use Value: Prevents damage to downstream optocouplers and microcontrollers with sub-µA leakage at 47.1 V. | Use Scenario: Providing traceable 62 V calibration reference in portable multimeters and bench power supplies. IC Role / Device Role / Timing Role: Precision shunt reference with tight tolerance and low knee impedance (76 Ω at 1 mA). Use Value: Enables <±0.3% absolute accuracy over 1000-hour life due to stable VZ drift and low ZZK. |
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) | Identical electrical specs; differs only in packaging (bulk vs. TR8 tape-and-reel) | No change in circuit function or layout; only affects SMT placement compatibility | Select 1N5372B/TR8 when using automated pick-and-place; choose bulk for manual or wave-solder assembly |
| MMBZ5255B (SOT-23) | Same 62 V ±5%, but 0.5 W rating, 100 mA IZM, surface-mount package | Not suitable for 5 W power dissipation; limited to low-current bias/reference use | Choose MMBZ5255B only for space-constrained, low-power designs where thermal mass is insufficient for axial devices |
Compared with 1N5372B/TR8, the bulk version offers identical performance with no layout impact but lacks SMT compatibility, while the MMBZ5255B sacrifices 10× power handling for miniaturization-making it unsuitable for primary regulation in industrial power stages.
Availability
1N5372B/TR8 is available at Aetrix Electronics and suitable for industrial power supply regulation, overvoltage protection circuits, programmable logic controller I/O protection, and test equipment reference sources requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1N5372B/TR8 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 1N53xxB series was designed specifically for ruggedized 5 W Zener regulation in harsh-environment power systems where long-term stability, surge resilience, and wide temperature operation are critical.
FAQ
What is the Zener voltage tolerance of the 1N5372B/TR8?
The 1N5372B/TR8 has a Zener voltage tolerance of ±5%, as indicated by the "B" suffix per Microsemi's documentation. This means its measured VZ at 20 mA test current falls between 58.9 V and 65.1 V at 25 °C. The tolerance remains stable across –65 °C to +150 °C operating range, supporting consistent regulation in industrial control systems.
Does the 1N5372B/TR8 require dry packing before PCB assembly?
No, the 1N5372B/TR8 does not require dry packing before PCB assembly. It carries IPC/JEDEC J-STD-020B moisture sensitivity level 1 classification, meaning it is not hygroscopic and can be stored and processed under standard ambient conditions without baking or desiccant packaging-reducing manufacturing complexity and cost.
What is the maximum steady-state power dissipation for the 1N5372B/TR8 on a standard FR4 PCB?
When mounted on a standard FR4 PCB (1 oz copper, 4 mm² pads, 1 mm track width, 25 mm length), the 1N5372B/TR8 has a steady-state power dissipation limit of 1.47 W at 25 °C ambient. This derates linearly above 25 °C per the published thermal resistance of 85 °C/W junction-to-ambient, making forced-air cooling or heatsinking necessary for full 5 W operation.
Can the 1N5372B/TR8 be used as a direct replacement for the 1N5372B in existing designs?
Yes, the 1N5372B/TR8 is electrically and mechanically identical to the 1N5372B, differing only in packaging format (tape-and-reel TR8 vs. bulk). All electrical parameters-including VZ, IZT, ZZ, IZM, and thermal characteristics-are identical. No PCB layout or schematic changes are needed when substituting 1N5372B/TR8 into designs originally specifying 1N5372B.
What is the surge current rating of the 1N5372B/TR8 and how is it defined?
The 1N5372B/TR8 has a peak non-recurrent surge current rating of 400 A, defined as the maximum amplitude of an 8.3 ms half-sine waveform. This rating reflects its ability to absorb transient energy without degradation-critical for protecting downstream components in motor drives and power converters exposed to inductive switching spikes or lightning-induced surges.
1N5372B/TR8 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:
- ±5%
- 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
1N5372B/TR8 FAQ
1.How can I place an order for 1N5372B/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5372B/TR8 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 1N5372B/TR8 reliable?
The price and inventory of 1N5372B/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5372B/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5372B/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5372B/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5372B/TR8?
1N5372B/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5372B/TR8 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 1N5372B/TR8?
For technical support, including 1N5372B/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5372B/TR8 requirements.
6.How does Aetrix verify that 1N5372B/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5372B/TR8 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 1N5372B/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5372B/TR8?
All 1N5372B/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5372B/TR8, 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 1N5372B/TR8 part is unused and in its original packaging.
Return procedure for 1N5372B/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5372B/TR8 Tags
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