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Microchip Technology 1N5372/TR8
- Part No.:
- 1N5372/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5372/TR8.pdf
- Description:
- DIODE ZENER 62V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,686
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Product details
Overview
1N5372/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, 42 Ω dynamic impedance at IZT, and 400 A surge current rating. 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 1N5372/TR8 datasheet, 1N5372/TR8 pinout, 1N5372/TR8 application, or 1N5372/TR8 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), maximum steady-state power (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-bias mode, maintaining stable output voltage across wide operating current (10–50% of IZM) and temperature ranges. Its low dynamic impedance (42 Ω) and tight voltage regulation (ΔVZ = 2.1 V) ensure minimal drift under load variation.
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 standard 4 mm² copper pads. The cathode band marking and UL94V-0 epoxy case support reliable manual and automated assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 62 V ±5% - precise regulation point for 48–72 V system references |
| Test Current (IZT) | 20 mA - standardized bias point for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZ) | 42 Ω at IZT - low AC resistance ensures stable voltage under varying load currents |
| Max Surge Current (IZSM) | 400 A (8.3 ms half-sine) - withstands transient overvoltage events without failure |
| Thermal Resistance | 25 °C/W junction-to-lead (3/8″ lead length) - enables high-power operation with minimal heatsinking |
| Reverse Leakage (IR) | <0.5 µA at 47.1 V - negligible standby current in high-impedance reference circuits |
| Power Dissipation | 5.0 W at TL < 25°C - supports robust regulation in compact, thermally constrained designs |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-204AL; void-free UL94V-0 epoxy body; cathode indicated by colored band; leads plated with RoHS-compliant matte tin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit ground or lower-potential rail; defines polarity for Zener operation |
| Cathode | Zener regulation terminal / Output reference node | Banded end; connected to regulated voltage node; reverse-biased during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures industry-standard mechanical and electrical compatibility across 1N53xxB series |
| Moisture sensitivity Level 1 | No dry pack required - simplifies handling and eliminates bake-out before assembly |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Robust against electrostatic discharge during handling and board insertion |
| RoHS compliant (e3 suffix) | Meets environmental compliance requirements without performance trade-offs |
| High surge current capability | 400 A peak withstand enables use in unfiltered input stages and lightning-prone environments |
Applications
| Industrial Power Supply Reference | Overvoltage Clamp for DC Bus |
|---|---|
Use Scenario: Precision feedback path in isolated 48 V telecom rectifier modules. IC Role / Device Role / Timing Role: Zener diode providing stable 62 V reference for optocoupler-based error amplifier. Use Value: Maintains ±0.5% output regulation across –40°C to +85°C ambient due to low ΔVZ (2.1 V) and tight ±5% VZ tolerance. | Use Scenario: Protection clamp on 60 V battery management system DC bus. IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing transient energy above 62 V threshold. Use Value: Survives 400 A surge (8.3 ms) without degradation, preventing downstream MOSFET failure during load dump events. |
| Programmable Voltage Monitor Input | High-Voltage Sensor Biasing |
Use Scenario: Threshold-setting element in discrete comparator circuit for 60 V system undervoltage/overvoltage detection. IC Role / Device Role / Timing Role: Stable Zener reference defining trip point for LM393-based monitoring stage. Use Value: Low 42 Ω dynamic impedance minimizes trip-point shift under varying supply current, ensuring consistent detection accuracy. | Use Scenario: Biasing network for high-side current sense amplifier in 60 V motor drive inverter. IC Role / Device Role / Timing Role: Provides regulated 62 V supply to op-amp input stage requiring elevated common-mode range. Use Value: Enables accurate sensing up to 60 V rail while maintaining <0.5 µA leakage, preserving signal integrity in high-impedance feedback paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5372B | No TR8 tape-and-reel packaging; bulk or ammo-pack only | Lacks automated SMT placement compatibility; requires manual or vibration-feed handling | Select when cost-sensitive prototyping or low-volume hand assembly is prioritized over production line efficiency |
| MMSZ5259ET1G | Surface-mount SOD-123 package; 62 V ±5%; 500 mW rating; 100 Ω ZZ | Not suitable for 5 W continuous dissipation; limited to low-power bias/reference roles | Select only for space-constrained, low-current applications where thermal mass and surge immunity are secondary |
Compared with 1N5372B and MMSZ5259ET1G, the 1N5372/TR8 uniquely combines 5 W power handling, axial-leaded manufacturability, and 400 A surge capability-making it irreplaceable in high-reliability industrial clamping and reference designs where thermal robustness and lead-form flexibility are mandatory.
Availability
1N5372/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, battery management systems, programmable voltage monitors, and high-voltage sensor biasing requiring stable component supply and long-term obsolescence mitigation.
Supply support for 1N5372/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N53xxB series was engineered for ruggedized voltage regulation in harsh-environment power systems, emphasizing surge resilience, wide temperature operation, and JEDEC-standardized mechanical reliability.
FAQ
What is the Zener voltage tolerance of the 1N5372/TR8?
The 1N5372/TR8 has a nominal Zener voltage of 62 V with ±5% tolerance, as indicated by the "B" suffix in its full designation. This means the actual measured VZ at 20 mA test current falls between 58.9 V and 65.1 V at TL = 25°C. The tolerance is guaranteed per JEDEC registration and applies across the full operating temperature range of –65°C to +150°C. The 1N5372/TR8 maintains this specification without derating under standard mounting conditions.
Does the 1N5372/TR8 require dry packing before PCB assembly?
No, the 1N5372/TR8 does not require dry packing prior to assembly. It carries IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it is non-hygroscopic and safe for standard reflow or wave soldering without baking. This is confirmed by Microsemi's documentation and applies to both the e3 RoHS-compliant version and legacy tin-lead variants. The 1N5372/TR8 can be stored and processed per standard handling protocols.
What is the maximum steady-state power dissipation of the 1N5372/TR8 on a standard FR4 PCB?
The 1N5372/TR8 delivers 1.47 W steady-state power when mounted on an FR4 PCB with 1 oz copper, 4 mm² copper pads, and 1 mm track width (25 mm length), per Microsemi's thermal characterization. This value reflects junction-to-ambient thermal resistance of 85 °C/W. At lead temperature (TL) < 25°C with 3/8″ lead length, the full 5.0 W rating applies. Derating curves in Figure 1 of the datasheet define linear reduction between these points.
How is polarity marked on the 1N5372/TR8?
The 1N5372/TR8 uses a cathode band marking: a single colored band (typically black or dark gray) encircling the cylindrical epoxy body near one end. That banded end is the cathode and must be held at a higher potential than the opposite (anode) end during Zener regulation operation. This marking complies with JEDEC DO-204AL standards and is visible under standard visual inspection. The 1N5372/TR8 must never be forward-biased in regulation circuits.
Is the 1N5372/TR8 suitable for surge protection in automotive load-dump scenarios?
Yes, the 1N5372/TR8 is rated for 400 A peak non-recurrent surge current (IZSM) in an 8.3 ms half-sine waveform, making it suitable for automotive load-dump suppression when properly heat-sunk. Its 62 V regulation voltage aligns with 42 V system clamping requirements, and its –65°C to +150°C operating range meets automotive under-hood temperature demands. However, system-level validation per ISO 7637-2 is required, as the 1N5372/TR8 alone does not constitute full compliance.
1N5372/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:
- ±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/TR8 FAQ
1.How can I place an order for 1N5372/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5372/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 1N5372/TR8 reliable?
The price and inventory of 1N5372/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5372/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5372/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5372/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5372/TR8?
1N5372/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5372/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 1N5372/TR8?
For technical support, including 1N5372/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5372/TR8 requirements.
6.How does Aetrix verify that 1N5372/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5372/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 1N5372/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5372/TR8?
All 1N5372/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5372/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 1N5372/TR8 part is unused and in its original packaging.
Return procedure for 1N5372/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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