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Microchip Technology 1N5372A/TR8
- Part No.:
- 1N5372A/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5372A/TR8.pdf
- Description:
- DIODE ZENER 62V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,963
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Product details
Overview
1N5372A/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 62 V, ±10% tolerance (A suffix), 42 Ω dynamic impedance at 20 mA test current, and maximum reverse leakage 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/TR8 datasheet, 1N5372A/TR8 pinout, 1N5372A/TR8 application, or 1N5372A/TR8 equivalent, this page provides verified electrical parameters, thermal derating behavior, JEDEC T-18 package details, and direct alternatives for voltage regulation design.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly specified voltage regulation (ΔVZ = 2.1 V between 10% and 50% of IZM) and low dynamic impedance-critical for stable reference generation under varying load currents. Its 25 °C/W junction-to-lead thermal resistance enables reliable 5 W dissipation when leads are mounted ≥10 mm from body.
The device exhibits minimal voltage drift across temperature (–65 °C to +150 °C) and withstands non-repetitive 8.3 ms surge currents up to 400 A. Polarity is marked by cathode band; operation requires cathode 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; high-voltage capability suits industrial DC bus monitoring. |
| Power Dissipation (PD) | 5.0 W at TL = 25 °C - supports robust voltage clamping in transient suppression circuits with adequate lead heatsinking. |
| Dynamic Impedance (ZZ) | 42 Ω at IZT = 20 mA - ensures low AC ripple coupling into reference nodes; critical for analog feedback stability. |
| Reverse Leakage (IR) | 0.5 μA max at VR = 47.1 V - guarantees negligible standby current in high-impedance bias networks. |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables predictable thermal design when leads serve as primary heat path (3/8″ length). |
| Surge Current (IZSM) | 400 A peak (8.3 ms half-sine) - provides immunity against common-mode transients in AC/DC front-end stages. |
| Operating Temperature | –65 °C to +150 °C - validated for under-hood automotive and industrial environments without derating penalties. |
Pinout & Package
JEDEC T-18 axial-leaded plastic package with cathode indicated by colored band. Leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026. Weight: 0.7 g. Moisture sensitivity level: Level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lower-potential rail; forms return path for Zener current. |
| Cathode | Regulated output node | Banded end; connected to voltage node requiring stabilization; reverse-biased during regulation. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures cross-manufacturer interchangeability and standardized test conditions per JESD24. |
| ±10% voltage tolerance (A suffix) | Provides cost-optimized regulation accuracy suitable for non-critical reference and clamp applications. |
| Level 1 moisture sensitivity | Eliminates baking requirements before PCB assembly-reduces manufacturing overhead and risk of popcorning. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Enables handling without special ESD controls-lowers production line complexity and failure rate. |
| High surge current rating | 400 A capability allows single-device transient suppression in 120/240 VAC input stages without external crowbar. |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing feedback reference in isolated flyback converters operating from 100–400 VDC input rails. IC Role / Device Role / Timing Role: Zener diode providing precise 62 V reference to optocoupler bias network. Use Value: Maintains ±1% output regulation across line/load variations due to low ΔVZ (2.1 V) and stable ZZ. |
Use Scenario: Clamping transient spikes on 48 V telecom battery backup lines during hot-swap events. IC Role / Device Role / Timing Role: Shunt element diverting surge energy above 62 V threshold to ground. Use Value: Withstands 400 A surges without degradation-eliminates need for parallel TVS arrays or complex active clamps. |
| Automotive Body Control Module | Test Equipment Reference Source |
Use Scenario: Providing stable bias voltage for CAN transceiver VIO supply in engine bay modules. IC Role / Device Role / Timing Role: Voltage reference maintaining logic-level compatibility across wide ambient temperature range. Use Value: Operates reliably from –65 °C to +150 °C with <0.5 μA leakage-preserves low-power sleep mode integrity. |
Use Scenario: Generating calibrated 62 V reference in portable multimeter calibration fixtures. IC Role / Device Role / Timing Role: Precision shunt regulator delivering traceable voltage standard under variable load. Use Value: ±10% tolerance and 42 Ω ZZ enable repeatable 0.1% measurement uncertainty at 20 mA test point. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5372B/TR8 | ±5% tolerance (vs. ±10% for 1N5372A/TR8); otherwise identical VZ, ZZ, and IZM. | Required where tighter regulation accuracy is needed for feedback loops with narrow error margins. | Select 1N5372B/TR8 when reference stability dominates cost sensitivity; same footprint and thermal profile. |
| MMBZ5255BLT1G | Surface-mount SOT-23 package; 62 V ±5%; 200 mW rating (vs. 5 W); ZZ = 130 Ω at 20 mA. | Suitable only for low-power signal-level clamping-not for power-stage regulation or surge handling. | Choose MMBZ5255BLT1G only for space-constrained PCBs with sub-10 mA regulation loads; not a drop-in replacement. |
Compared with 1N5372B/TR8, the 1N5372A/TR8 trades regulation accuracy for cost and simplifies qualification in less demanding applications; versus MMBZ5255BLT1G, it delivers 25× higher power handling and 3× lower impedance but requires axial through-hole mounting.
Availability
1N5372A/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and automotive body control modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N5372A/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 1N53xx series was designed specifically for ruggedized voltage regulation in harsh-environment power systems-emphasizing thermal robustness, surge resilience, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance of the 1N5372A/TR8?
The 1N5372A/TR8 has a nominal Zener voltage of 62 V with a tolerance of ±10%, as indicated by the "A" suffix per Microsemi's datasheet. This tolerance applies across the full operating temperature range of –65 °C to +150 °C and is measured at 20 mA test current with lead temperature held at 25 °C. The 1N5372A/TR8 is not rated for tighter tolerances unless re-screened.
Can the 1N5372A/TR8 be used in surface-mount designs?
No-the 1N5372A/TR8 uses a JEDEC T-18 axial-leaded package and is not compatible with surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5372A series in DO-214AA (SMB) package. The 1N5372A/TR8 requires through-hole mounting with ≥10 mm lead length from body to maintain its 5 W power rating.
What is the maximum steady-state current for the 1N5372A/TR8 at room temperature?
The 1N5372A/TR8 supports a maximum Zener current (IZM) of 80 mA at 25 °C lead temperature, calculated as PD/VZ(min) = 5.0 W / 55.8 V (62 V −10%). This value assumes adequate heatsinking via leads; on FR4 board with 4 mm² copper pads, derated power drops to 1.47 W, limiting IZM to ~23.5 mA.
Does the 1N5372A/TR8 require dry-pack packaging per J-STD-020?
No-the 1N5372A/TR8 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it is not hygroscopic and does not require dry-packaging or baking prior to reflow. This eliminates moisture-related assembly risks and reduces handling steps in high-volume manufacturing.
How does the 1N5372A/TR8 compare to the 1N5372B/TR8 in terms of thermal performance?
The 1N5372A/TR8 and 1N5372B/TR8 share identical thermal characteristics: both have 25 °C/W junction-to-lead resistance and identical package construction. The only difference is voltage tolerance (±10% vs. ±5%). Thermal derating curves, surge ratings, and maximum power dissipation are fully interchangeable between the two variants.
1N5372A/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:
- ±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/TR8 FAQ
1.How can I place an order for 1N5372A/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5372A/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 1N5372A/TR8 reliable?
The price and inventory of 1N5372A/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5372A/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5372A/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5372A/TR8 transactions.
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4.How is shipping managed for 1N5372A/TR8?
1N5372A/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5372A/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 1N5372A/TR8?
For technical support, including 1N5372A/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5372A/TR8 requirements.
6.How does Aetrix verify that 1N5372A/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5372A/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 1N5372A/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5372A/TR8?
All 1N5372A/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5372A/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 1N5372A/TR8 part is unused and in its original packaging.
Return procedure for 1N5372A/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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