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Microchip Technology 1N5372E3/TR8
- Part No.:
- 1N5372E3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5372E3/TR8.pdf
- Description:
- DIODE ZENER 62V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:9,902
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Product details
Overview
1N5372E3/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 62 V, ±5% tolerance (B-suffix equivalent), 20 mA test current, 42 Ω dynamic impedance at IZT, and maximum surge current of 400 A (8.3 ms half-sine). 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 1N5372E3/TR8 datasheet, 1N5372E3/TR8 pinout, 1N5372E3/TR8 application, or 1N5372E3/TR8 equivalent, key selection criteria include Zener voltage tolerance, 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 operating in reverse breakdown, where Zener voltage is stabilized across a broad current range (10–50% of IZM). Its low dynamic impedance (42 Ω) and tight voltage regulation (ΔVZ = 2.1 V) ensure minimal output variation under load transients.
Designed for axial-lead through-hole mounting on FR4 PCBs with 4 mm² copper pads, it delivers 1.47 W steady-state power at TA = 25 °C and requires no dry pack due to IPC/JEDEC J-STD-020B Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 62 V nominal, ±5% tolerance - defines regulated output voltage under specified test conditions. |
| Test Current (IZT) | 20 mA - current at which VZ is measured; sets baseline operating point for regulation accuracy. |
| Dynamic Impedance (ZZ) | 42 Ω at IZT - quantifies voltage change per mA current shift; lower value improves regulation stability. |
| Max Surge Current (IZSM) | 400 A (8.3 ms half-sine) - peak non-repetitive current handling for transient suppression. |
| Thermal Resistance | 25 °C/W junction-to-lead (3/8″ lead length) - determines temperature rise per watt dissipated; critical for heatsink design. |
| Reverse Leakage (IR) | <0.5 µA at 47.1 V - ensures minimal standby power loss and high impedance in off-state. |
| Power Dissipation | 5.0 W at TL < 25 °C - maximum continuous DC power before thermal derating applies. |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), cathode indicated by band; leads are annealed matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for reverse-bias operation | Connected to system ground or lower-potential rail; forms return path during Zener conduction. |
| Cathode | Regulated output node | Banded end; connected to voltage rail requiring stabilization; carries full Zener current during regulation. |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant construction | e3 suffix confirms lead-free matte-tin plating and compliance with EU Directive 2011/65/EU. |
| Low voltage regulation drift | ΔVZ = 2.1 V between 10% and 50% of IZM - enables stable reference in varying load conditions. |
| High surge withstand capability | 400 A non-repetitive surge rating - protects downstream circuitry from line transients without failure. |
| Moisture-insensitive packaging | IPC/JEDEC J-STD-020B Level 1 - eliminates dry-pack requirement and simplifies SMT reflow handling. |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - reduces risk of damage during manual handling or board assembly. |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing feedback reference in 48 V telecom rectifier modules operating at ambient temperatures up to 85 °C. IC Role / Device Role / Timing Role: Two-terminal voltage reference providing precise 62 V threshold for error amplifier input. Use Value: Maintains ±0.5% output voltage accuracy over 10–100% load step due to 42 Ω ZZ and low ΔVZ. | Use Scenario: Clamping induced surges on 60 V DC bus in railway signaling equipment exposed to lightning-induced transients. IC Role / Device Role / Timing Role: Shunt protector diverting excess energy to ground when bus voltage exceeds 62 V. Use Value: Withstands 400 A (8.3 ms) surge without parametric shift, verified per MIL-STD-750 Method 3013. |
| Programmable Voltage Reference | DC Link Monitoring Threshold |
Use Scenario: Setting trip point for undervoltage lockout (UVLO) in motor drive gate driver ICs powered from split-rail supplies. IC Role / Device Role / Timing Role: Precision reference element defining 62 V activation threshold for comparator input. Use Value: ±5% tolerance ensures consistent UVLO behavior across production lots without calibration. | Use Scenario: Detecting overvoltage fault condition on 60 V DC link capacitor bank in solar charge controllers. IC Role / Device Role / Timing Role: Sensing element triggering shutdown logic when DC link exceeds safe operating limit. Use Value: Low 0.5 µA leakage at 47.1 V minimizes false triggers and extends monitoring circuit battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5372B | Same electrical specs but SnPb lead finish; no e3 RoHS designation. | Not suitable for lead-free manufacturing; requires exemption documentation for EU markets. | Select only if legacy SnPb assembly process is mandated and RoHS compliance is waived. |
| MMSZ5255B-TP | Surface-mount SOD-123 package; 62 V, ±5%, 200 mW rating; higher ZZ (150 Ω). | Lower power handling limits use to signal-level references; unsuitable for 5 W regulation. | Choose only for space-constrained PCBs where power dissipation ≤200 mW is acceptable. |
Compared with 1N5372B and MMSZ5255B-TP, the 1N5372E3/TR8 uniquely combines 5 W power handling, axial-leaded mechanical robustness, RoHS compliance, and 42 Ω dynamic impedance-making it optimal for industrial-grade through-hole voltage regulation where thermal margin and surge immunity are critical.
Availability
1N5372E3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and programmable voltage reference designs requiring stable component supply and long-term manufacturability.
Supply support for 1N5372E3/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 applications.
The 1N53xx series was designed specifically for ruggedized 5 W Zener regulation in harsh-environment power systems, emphasizing thermal performance, surge resilience, and long-term parameter stability.
FAQ
What is the Zener voltage tolerance of the 1N5372E3/TR8?
The 1N5372E3/TR8 has a nominal Zener voltage of 62 V with ±5% tolerance, as confirmed by its B-suffix equivalent specification in the Microsemi 1N5333B–1N5388B datasheet. This tolerance is measured at 20 mA test current and 25 °C lead temperature. The e3 suffix indicates RoHS compliance but does not alter voltage tolerance.
Can the 1N5372E3/TR8 be used in surface-mount designs?
No, the 1N5372E3/TR8 is an axial-leaded T-18 package device intended for through-hole mounting. For surface-mount alternatives, Microsemi offers the SMBJ5372B or SMBG5372B in DO-214AA/DO-214AB packages-but these differ in thermal performance, surge rating, and footprint. The 1N5372E3/TR8 itself cannot be soldered to SMT pads without mechanical adaptation.
What is the maximum steady-state power dissipation of the 1N5372E3/TR8 on a standard FR4 PCB?
When mounted on a standard FR4 PCB (1 oz Cu) with 4 mm² copper pads and 1 mm track width, the 1N5372E3/TR8 delivers 1.47 W steady-state power at TA = 25 °C. This derates linearly above 25 °C per the published thermal resistance of 85 °C/W junction-to-ambient, as shown in Figure 1 of the Microsemi datasheet.
Does the 1N5372E3/TR8 require dry packing before reflow soldering?
No, the 1N5372E3/TR8 has IPC/JEDEC J-STD-020B moisture sensitivity level (MSL) 1, meaning it is not moisture-sensitive and requires no dry pack or baking prior to soldering. Its void-free thermosetting epoxy body meets UL94V-0 and is rated for 260 °C for 10 seconds during reflow.
How does the dynamic impedance of the 1N5372E3/TR8 affect regulation performance?
The 1N5372E3/TR8 exhibits 42 Ω dynamic impedance (ZZ) at 20 mA test current, directly determining how much the Zener voltage shifts with load current changes. A lower ZZ like this enables tighter regulation-e.g., a 10 mA load step causes only ~0.42 V deviation-making the 1N5372E3/TR8 suitable for precision reference applications where stability matters.
1N5372E3/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
1N5372E3/TR8 FAQ
1.How can I place an order for 1N5372E3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5372E3/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 1N5372E3/TR8 reliable?
The price and inventory of 1N5372E3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5372E3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5372E3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5372E3/TR8 transactions.
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4.How is shipping managed for 1N5372E3/TR8?
1N5372E3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5372E3/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 1N5372E3/TR8?
For technical support, including 1N5372E3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5372E3/TR8 requirements.
6.How does Aetrix verify that 1N5372E3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5372E3/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 1N5372E3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5372E3/TR8?
All 1N5372E3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5372E3/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 1N5372E3/TR8 part is unused and in its original packaging.
Return procedure for 1N5372E3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5372E3/TR8 Tags
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