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Microchip Technology 1N5372BE3/TR8
- Part No.:
- 1N5372BE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5372BE3/TR8.pdf
- Description:
- DIODE ZENER 62V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:6,072
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Product details
Overview
1N5372BE3/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 dynamic impedance (ZZ), and maximum reverse current of 0.5 μA at 47.1 V (VR). It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in DC power supplies.
For engineers reviewing the 1N5372BE3/TR8 datasheet, 1N5372BE3/TR8 pinout, 1N5372BE3/TR8 application, or 1N5372BE3/TR8 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (400 A), voltage regulation (ΔVZ = 2.1 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse breakdown. Its Zener voltage is specified at 25 °C with 20 mA test current and exhibits low dynamic impedance (42 Ω) and tight voltage regulation (ΔVZ = 2.1 V between 10% and 50% of IZM).
It features a T-18 axial package with cathode band marking, moisture sensitivity level 1 (no dry pack required), and thermal resistance of 25 °C/W junction-to-lead at 10 mm lead length - enabling stable regulation under high-current DC conditions when adequately heat-sunk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 62 V ±5% - precise reference point for feedback loops in regulated DC supplies |
| Test Current (IZT) | 20 mA - standard bias point for specifying VZ and ZZ; defines stable operating zone |
| Dynamic Impedance (ZZ) | 42 Ω - low AC resistance ensures minimal output voltage variation under load transients |
| Max Reverse Current (IR) | 0.5 μA at 47.1 V - confirms sharp knee and low leakage below regulation threshold |
| Power Dissipation (Pd) | 5.0 W at TL < 25 °C - supports high-current regulation when leads act as heatsink |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables thermal design using lead length as primary heat path |
| Surge Current (IZSM) | 400 A (8.3 ms half-sine) - withstands transient overvoltage events without failure |
| Voltage Regulation (ΔVZ) | 2.1 V - difference between VZ measured at 10% and 50% of IZM; quantifies regulation linearity |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-201AD; cathode indicated by colored band; RoHS-compliant matte-tin plated leads solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; establishes polarity for reverse-bias operation |
| Cathode | Regulated output node | Banded end; held at stable 62 V above anode when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard DO-201AD mechanical and electrical definitions |
| ±5% voltage tolerance (B suffix) | Reduces calibration overhead in mid-precision reference designs |
| Moisture Sensitivity Level 1 | Eliminates baking requirement prior to reflow; simplifies SMT assembly prep |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Enables handling without special ESD controls during board assembly |
| RoHS-compliant (e3 suffix) | Meets EU Directive 2011/65/EU; tin-lead-free matte-tin plating |
| Tape-and-reel packaging (TR8) | Supports automated pick-and-place placement; 8 mm tape per EIA-296 |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Excitation Reference |
|---|---|
Use Scenario: Provides stable 62 V reference for optocoupler-based feedback in isolated 48 V–60 V output SMPS. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference in secondary-side error amplifier loop. Use Value: Maintains ±1.5% output regulation across line/load/temperature due to low ΔVZ (2.1 V) and stable VZ over 25–100 mA operating range. | Use Scenario: Supplies excitation voltage to bridge-based pressure sensors in hydraulic control systems. IC Role / Device Role / Timing Role: Precision shunt regulator establishing fixed bias point for ratiometric sensor signal conditioning. Use Value: Delivers 62 V ±3.1 V (±5%) with <0.5 μA leakage at 47.1 V, minimizing sensor offset drift and enabling 16-bit ADC resolution. |
| Overvoltage Clamp for Telecom Line Cards | Programmable Current Source Biasing |
Use Scenario: Protects downstream DC-DC converters on -48 V telecom distribution boards against positive surges up to +100 V. IC Role / Device Role / Timing Role: Transient voltage clamp placed across input bus to divert surge energy into ground. Use Value: Withstands 400 A (8.3 ms) surge current and clamps within 2.1 V window, preventing damage to 75 V-rated MOSFETs and controllers. | Use Scenario: Sets reference voltage for LM334-based constant-current source driving laser diodes in fiber-optic modules. IC Role / Device Role / Timing Role: Stable voltage node defining compliance limit for current-setting resistor network. Use Value: Enables 1% current accuracy over –40 °C to +85 °C via low thermal coefficient (TCVZ ≈ 0.05%/°C typical for 62 V Zeners) and minimal ZZ-induced ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5372BRLG | Same 62 V ±5%, 5 W rating, but in bulk packaging (no TR8 tape); identical electrical specs | No tape-and-reel support; unsuitable for automated assembly | Select 1N5372BE3/TR8 for SMT production; choose 1N5372BRLG for manual prototyping or repair |
| MMSZ5259ET1G | Surface-mount SOD-123 package; 62 V ±5%, but only 500 mW power rating and higher ZZ (150 Ω) | Limited to low-power biasing; cannot replace 1N5372BE3/TR8 in 5 W regulation roles | Use MMSZ5259ET1G only where board space is constrained and power <100 mW; not a functional substitute for 5 W loads |
Compared with 1N5372BRLG and MMSZ5259ET1G, the 1N5372BE3/TR8 uniquely combines axial-leaded mechanical robustness, 5 W dissipation capability, tape-and-reel automation readiness, and JEDEC-standardized performance - making it the sole choice for high-reliability, medium-power Zener regulation requiring manufacturability and thermal margin.
Availability
1N5372BE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, telecom line protection, sensor excitation circuits, and programmable current sources requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N5372BE3/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, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N53xxB series was designed specifically for high-stability, medium-power voltage regulation in harsh-environment power systems - emphasizing thermal resilience, surge immunity, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance of the 1N5372BE3/TR8?
The 1N5372BE3/TR8 has a Zener voltage tolerance of ±5%, indicated by the "B" suffix in its part number. This means its actual regulation voltage falls between 58.9 V and 65.1 V at 20 mA test current and 25 °C. The e3 suffix confirms RoHS compliance, and TR8 denotes 8 mm tape-and-reel packaging - all consistent with Microsemi's documented specifications for this variant.
Can the 1N5372BE3/TR8 be used in surface-mount designs?
No, the 1N5372BE3/TR8 uses a T-18 axial-leaded package (JEDEC DO-201AD) and is not surface-mount compatible. For SMT equivalents, Microsemi offers the SMBJ5372B series in SMB package, but those differ in thermal performance, mounting method, and footprint. The 1N5372BE3/TR8 requires through-hole or axial mounting with ≥10 mm lead length for rated 5 W dissipation.
What is the maximum steady-state power dissipation of the 1N5372BE3/TR8 at ambient temperature?
When mounted on a standard FR4 PCB with 1 oz copper, 4 mm² pads, and 1 mm × 25 mm traces, the 1N5372BE3/TR8 delivers 1.47 W at TA = 25 °C. Its full 5 W rating applies only at TL < 25 °C with 10 mm lead length acting as heatsink - a critical distinction for thermal design. Derating curves in Microsemi's datasheet confirm linear reduction above 25 °C.
Does the 1N5372BE3/TR8 meet MIL-PRF-19500 screening requirements?
No, the 1N5372BE3/TR8 is a commercial-grade part with e3 (RoHS) and TR8 (tape-and-reel) suffixes only. MIL-PRF-19500 screening (e.g., JAN, JANTX, JANTXV) requires prefix modifiers like MQ, MX, or MV - which are absent here. For screened versions, part numbers such as MV1N5372B would apply, but those are distinct orderables with different testing, traceability, and qualification.
What is the reverse leakage current specification for the 1N5372BE3/TR8?
The 1N5372BE3/TR8 specifies a maximum reverse current (IR) of 0.5 μA at VR = 47.1 V - the rated voltage at which leakage is guaranteed not to exceed that value. This test condition corresponds to 75.9% of nominal VZ (62 V), confirming low off-state conduction and sharp knee behavior essential for precision regulation and low-power standby modes.
1N5372BE3/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
1N5372BE3/TR8 FAQ
1.How can I place an order for 1N5372BE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5372BE3/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 1N5372BE3/TR8 reliable?
The price and inventory of 1N5372BE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5372BE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5372BE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5372BE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5372BE3/TR8?
1N5372BE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5372BE3/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 1N5372BE3/TR8?
For technical support, including 1N5372BE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5372BE3/TR8 requirements.
6.How does Aetrix verify that 1N5372BE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5372BE3/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 1N5372BE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5372BE3/TR8?
All 1N5372BE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5372BE3/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 1N5372BE3/TR8 part is unused and in its original packaging.
Return procedure for 1N5372BE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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