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onsemi 1N4372ARL
- Part No.:
- 1N4372ARL
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4372ARL.pdf
- Description:
- DIODE ZENER 3V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:56,490
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Product details
Overview
1N4372ARL from ON Semiconductor is a 500 mW, 3.0 V ±5% hermetically sealed glass Zener diode in DO-35 (DO-204AH) package, rated for –65°C to +200°C operation, with 29 Ω max zener impedance at 20 mA and 50 µA max reverse leakage at 1 V, used for precision voltage reference and low-power regulation in industrial sensor interfaces.
For engineers reviewing the 1N4372ARL datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, thermal stability up to +200°C, ESD rating >16 kV HBM, and DO-35 mechanical robustness in harsh environments.
Technical Context
This device employs silicon-oxide passivated junction technology to achieve stable breakdown characteristics and low dynamic impedance. Its double-slug, metallurgically bonded construction ensures reliable thermal transfer and hermetic sealing against moisture and contaminants.
The 1N4372ARL operates with a nominal zener voltage of 3.0 V measured at 20 mA (IZT), exhibits a temperature coefficient near zero in the 3 V range (per Figure 4a), and maintains regulation under steady-state power dissipation up to 500 mW at lead temperature ≤75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.85–3.15 V @ IZT = 20 mA - tight ±5% tolerance enables accurate reference generation without trimming |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - supports continuous regulation in compact, unheatsinked layouts |
| Zener Impedance (ZZT) | ≤29 Ω @ IZT = 20 mA - low dynamic resistance ensures minimal output voltage variation under load changes |
| Reverse Leakage (IR) | ≤50 µA @ VR = 1 V - low leakage preserves accuracy in high-impedance bias networks |
| ESD Rating | >16 kV per Human Body Model - robust handling during manual assembly and field operation |
| Operating Temperature | –65°C to +200°C - validated for aerospace, downhole, and high-temp industrial use |
Pinout & Package
Package: DO-35 (DO-204AH), axial-lead, hermetically sealed glass case with cathode polarity band. Double-slug construction provides enhanced thermal path and mechanical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower potential node; forms reference return path |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 3.0 V output when reverse-biased; marked by color band |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass sealing | Prevents moisture ingress and parameter drift over decades in humid or corrosive atmospheres |
| Silicon-oxide passivated junction | Delivers stable VZ and low noise across temperature and lifetime, critical for metrology-grade references |
| Double-slug metallurgical bond | Reduces thermal resistance from junction to lead (θJL ≈ 100°C/W), enabling higher pulsed power capability |
| ±5% VZ tolerance | Eliminates need for external trimming in cost-sensitive instrumentation and power supply feedback paths |
Applications
| Industrial Sensor Signal Conditioning | Aerospace Power Monitor Reference |
|---|---|
Use Scenario: Providing stable 3.0 V reference for bridge sensor amplifiers in factory-floor pressure transducers. IC Role / Device Role / Timing Role: Zener diode acting as precision shunt voltage reference in op-amp feedback network. Use Value: Tight ±5% VZ and low 29 Ω ZZT ensure <±2 mV output drift across 0–70°C ambient, meeting ISO 5167 calibration requirements. | Use Scenario: Biasing comparator inputs in satellite EPS battery voltage supervision circuits. IC Role / Device Role / Timing Role: Shunt regulator establishing fault-threshold reference point for undervoltage lockout. Use Value: Operation up to +200°C and >16 kV HBM ESD rating ensure reliability during launch vibration and space radiation exposure. |
| Downhole Oilfield Instrumentation | Medical Infusion Pump Power Supervision |
Use Scenario: Regulating bias voltage for MEMS accelerometers deployed in geothermal drill-string telemetry tools. IC Role / Device Role / Timing Role: Primary voltage clamp protecting analog front-end from transient overvoltage during motor switching. Use Value: Hermetic DO-35 package withstands 200°C wellbore temperatures and H2S exposure without parameter shift or leakage increase. | Use Scenario: Generating reference for microcontroller ADC monitoring of 5 V rail integrity in portable infusion pumps. IC Role / Device Role / Timing Role: Low-power shunt reference enabling <1 µA standby current while maintaining 3.0 V accuracy. Use Value: 50 µA max IR at 1 V ensures negligible loading on high-impedance divider networks, preserving battery life over 12-month service intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4728A | Same 3.3 V nominal VZ, but ±5% tolerance, 1.0 W rating, DO-41 package | Higher power dissipation supports higher current loads; larger DO-41 footprint requires PCB redesign | Select when >500 mW regulation or improved thermal margin is required |
| BZX55C3V0 | 3.0 V nominal VZ, ±5%, 500 mW, DO-35, but only rated to +150°C and lacks documented >16 kV HBM ESD | Lower max temperature and unverified ESD performance limit use in aerospace or downhole designs | Select for commercial-grade cost-sensitive applications where full 200°C and ESD specs are not mandatory |
Compared with 1N4372ARL, the 1N4728A offers higher power capacity but requires layout change, while the BZX55C3V0 matches form factor and voltage but sacrifices high-temperature reliability and ESD robustness-making 1N4372ARL optimal for mission-critical, high-reliability deployments.
Availability
1N4372ARL is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, aerospace power monitor reference, and downhole oilfield instrumentation requiring stable component supply across extended temperature and lifecycle demands.
Supply support for 1N4372ARL 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient, high-reliability components for automotive, industrial, cloud, and medical applications.
The 1N4370A Series was designed specifically for high-stability, high-temperature voltage reference and regulation in mission-critical systems where hermetic sealing and wide thermal range are mandatory.
FAQ
What is the exact zener voltage tolerance for 1N4372ARL?
The 1N4372ARL has a nominal zener voltage of 3.0 V with a guaranteed tolerance of ±5%, meaning its actual VZ falls between 2.85 V and 3.15 V when measured at IZT = 20 mA and lead temperature of 30°C ±1°C. This tolerance is standardized across the entire 1N4370A Series and confirmed in the "Tolerance and Type Number Designation" section of the datasheet.
Does 1N4372ARL support operation above 150°C?
Yes, the 1N4372ARL is fully specified for continuous operation from –65°C to +200°C, as stated in the "Maximum Ratings" table. Its hermetically sealed glass package and silicon-oxide passivated junction enable stable electrical performance across this full range, unlike standard Zeners limited to +150°C.
What is the maximum reverse leakage current for 1N4372ARL at 1 V?
The maximum reverse leakage current (IR) for 1N4372ARL is 50 µA when tested at VR = 1 V and TA = 25°C, per the Electrical Characteristics table on page 166. This value is confirmed for the 1N4372A variant and applies identically to the 1N4372ARL tape-and-reel version.
Is 1N4372ARL compatible with lead-free reflow soldering?
No-1N4372ARL is intended for wave or hand soldering only, with a maximum lead temperature of 230°C for 10 seconds at 1/16″ from the case. It is not qualified for lead-free reflow (typically >260°C peak), as its glass package and internal construction are not rated for those thermal profiles.
What packaging options are available for 1N4372ARL?
The 1N4372ARL is supplied in tape-and-reel format with 5000 units per reel, using 26 mm tape spacing (denoted by the "2" suffix in alternate part numbers like 1N4372ARL2). This format is optimized for automated pick-and-place assembly while preserving the DO-35 mechanical integrity.
1N4372ARL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 29 Ohms
- Current - Reverse Leakage @ Vr:
- 50 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
1N4372ARL FAQ
1.How can I place an order for 1N4372ARL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4372ARL 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 1N4372ARL reliable?
The price and inventory of 1N4372ARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4372ARL is usually 5 days.
3.What payment methods are accepted for 1N4372ARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4372ARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4372ARL?
1N4372ARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4372ARL 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 1N4372ARL?
For technical support, including 1N4372ARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4372ARL requirements.
6.How does Aetrix verify that 1N4372ARL is sourced from the original manufacturer or authorized distributors?
All 1N4372ARL 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 1N4372ARL meets industry standards.
7.What is the process for return or replacement of 1N4372ARL?
All 1N4372ARL units undergo pre-shipment inspection (PSI). If there is an issue with 1N4372ARL, 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 1N4372ARL part is unused and in its original packaging.
Return procedure for 1N4372ARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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