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onsemi 1N5380B
- Part No.:
- 1N5380B
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5380B.pdf
- Description:
- DIODE ZENER 120V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:8,155
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Product details
Overview
1N5380B from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 120 V, ±5% tolerance, maximum zener impedance of 10 Ω at 170 mA test current, and surge rating of 1150 A at 8.3 ms. It operates as a precision voltage reference or overvoltage clamp in DC power supply regulation circuits.
For engineers reviewing the 1N5380B datasheet, pinout, applications, or equivalent options, key selection criteria include its 120 V nominal breakdown, low 10 Ω dynamic impedance at IZT, 1.3 V leakage current limit at 91.2 V, and compatibility with lead-free reflow soldering up to 260°C.
Technical Context
The 1N5380B uses a silicon-oxide passivated junction for stable voltage regulation under steady-state and transient conditions. Its thermal design supports 5 W continuous dissipation at TL = 25°C with 25 °C/W junction-to-lead thermal resistance and derating above ambient.
It exhibits a positive temperature coefficient typical of high-voltage Zeners (≈1.3 mV/°C per Figure 3), and maintains regulation across −65°C to +200°C operating range, with DC max junction temperature limited to 150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 114–126 V (±5% tolerance at IZT = 170 mA; defines regulated output voltage window) |
| Max Power Dissipation | 5 W @ TL = 25°C (supports robust voltage clamping without heatsink in low-duty-cycle applications) |
| Zener Impedance (ZZT) | 10 Ω max @ IZT = 170 mA (ensures tight regulation under load variation) |
| Leakage Current (IR) | 2.5 μA max @ VR = 91.2 V (minimizes standby power loss in high-impedance bias networks) |
| Surge Current (IRM) | 1150 A peak @ 8.3 ms (withstands lightning-induced transients in industrial power inputs) |
| Junction Temp Range | −65°C to +200°C (enables operation in automotive under-hood or industrial outdoor enclosures) |
| ESD Rating | Class 3 (>16 kV HBM) (survives handling without external protection diodes) |
Pinout & Package
Package: Axial-lead, transfer-molded plastic (Case 017AA), cathode indicated by band. Dimensions: 8.38–8.89 mm length × 3.30–3.68 mm diameter, leads 25.4–31.75 mm long.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node; reverse-biased during regulation |
| Cathode | Zener breakdown terminal / voltage reference node | Connected to higher-potential rail; establishes regulated output at cathode potential |
Key Features
| Feature | Design Value |
|---|---|
| 5 W Surmetic® construction | Enables compact, high-power regulation without discrete heatsinking in space-constrained PCBs |
| Silicon-oxide passivated junction | Delivers stable long-term VZ drift and low noise vs. non-passivated alternatives |
| Pb-free compliant (G suffix) | Meets RoHS/REACH requirements without compromising solderability or thermal performance |
| 260°C soldering tolerance | Supports standard lead-free reflow profiles without delamination or parameter shift |
| 180 W surge rating | Provides single-event transient immunity exceeding IEC 61000-4-5 Level 4 requirements |
Applications
| Industrial Power Supply Regulation | Automotive ECU Voltage Reference |
|---|---|
Use Scenario: Stabilizing auxiliary 120 V rail in programmable logic controller (PLC) backplane power modules. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator and overvoltage clamp for isolated DC-DC converter feedback loop. Use Value: Maintains ±1.5% output accuracy over −40°C to +85°C ambient using its 120 V ±5% VZ and low 10 Ω ZZT. | Use Scenario: Providing precise 120 V reference for high-side gate driver bias in 48 V mild-hybrid vehicle battery management systems. IC Role / Device Role / Timing Role: Voltage reference element ensuring MOSFET gate drive stability during load dump transients. Use Value: Withstands 1150 A surge current at 8.3 ms, preventing latch-up during ISO 7637-2 Pulse 5a events. |
| Telecom Line Card Protection | Test Equipment High-Voltage Calibration |
Use Scenario: Clamping induced surges on -48 V telecom distribution lines exposed to lightning coupling. IC Role / Device Role / Timing Role: Transient voltage suppressor placed across line input before DC-DC conversion stage. Use Value: Limits peak voltage to ≤126 V with <2.5 μA leakage at 91.2 V, preserving upstream filter capacitor lifetime. | Use Scenario: Serving as traceable 120 V calibration standard in benchtop high-voltage source meters. IC Role / Device Role / Timing Role: Precision shunt reference used in closed-loop feedback of programmable HV output stages. Use Value: Delivers 114–126 V regulation with <10 Ω dynamic impedance, enabling <0.1% full-scale accuracy in metrology-grade instruments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5380BRLG | Same electrical specs; tape-and-reel packaging (4000 units/reel) vs. bulk box (1000 units) | Optimized for automated SMT placement; requires compatible feeder setup | Select for high-volume production where pick-and-place efficiency outweighs manual prototyping convenience |
| BZX85C120 | 120 V ±5%, but 1.3 W rating, 100 Ω ZZT, and 200°C max TJ; no surge rating specified | Suitable only for low-power biasing; cannot replace 1N5380B in 5 W regulation or surge-clamp roles | Choose only for space-constrained, low-dissipation reference nodes where 5 W headroom is unnecessary |
Compared with 1N5380BRLG, the 1N5380B offers identical regulation performance in bulk form for prototyping and low-volume builds; compared with BZX85C120, it delivers 3.8× higher power handling, 10× lower dynamic impedance, and validated 1150 A surge capability-making it irreplaceable in industrial-grade clamp and regulator designs.
Availability
1N5380B is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive ECU voltage reference, and telecom line card protection requiring stable component supply across extended temperature ranges and high-reliability environments.
Supply support for 1N5380B 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
onsemi (Semiconductor Components Industries, LLC) is a global supplier of energy-efficient semiconductor solutions, specializing in power management, analog, sensing, and connectivity technologies.
The 1N53 Series belongs to onsemi's Surmetic® 40 Zener family, engineered for high-reliability voltage regulation in harsh-environment applications including industrial controls, automotive subsystems, and telecom infrastructure.
FAQ
What is the nominal zener voltage and tolerance of the 1N5380B?
The 1N5380B has a nominal zener voltage of 120 V with a guaranteed tolerance of ±5%, meaning its actual breakdown voltage falls between 114 V and 126 V when tested at IZT = 170 mA. This tight tolerance ensures predictable regulation in precision power supply feedback paths and voltage reference circuits where stable setpoints are critical.
What is the maximum continuous power dissipation rating for the 1N5380B?
The 1N5380B is rated for 5 W maximum steady-state power dissipation at a lead temperature (TL) of 25°C, with linear derating of 40 mW/°C above that temperature. This rating assumes 3/8-inch lead length to heatsink and enables reliable operation in unheatsinked, high-voltage clamp applications such as industrial DC bus protection.
Does the 1N5380B support lead-free soldering processes?
Yes, the 1N5380B is offered in Pb-free packaging (indicated by the "G" suffix) and is qualified for lead-free reflow soldering at up to 260°C for 10 seconds at 1/16 inch from the case. Its thermosetting plastic body and corrosion-resistant leads ensure solder joint integrity and long-term reliability without requiring special flux or preheat profiles.
What is the zener impedance of the 1N5380B and why does it matter?
The 1N5380B has a maximum zener impedance (ZZT) of 10 Ω at its test current of 170 mA. This low dynamic impedance ensures minimal output voltage variation under changing load currents-critical for maintaining regulation accuracy in feedback loops and reducing ripple in shunt-regulated supplies where load transients occur.
How does the 1N5380B handle transient surge events?
The 1N5380B is rated for a peak non-repetitive surge current of 1150 A at 8.3 ms pulse width, corresponding to an 180 W surge power rating. This capability allows it to absorb high-energy transients-such as those from inductive switching or lightning-induced surges-without failure, making it suitable for primary-side clamping in industrial and telecom power interfaces.
1N5380B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 120 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 170 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 91.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 1 A
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N5380B FAQ
1.How can I place an order for 1N5380B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5380B 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 1N5380B reliable?
The price and inventory of 1N5380B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5380B is usually 5 days.
3.What payment methods are accepted for 1N5380B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5380B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5380B?
1N5380B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5380B 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 1N5380B?
For technical support, including 1N5380B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5380B requirements.
6.How does Aetrix verify that 1N5380B is sourced from the original manufacturer or authorized distributors?
All 1N5380B 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 1N5380B meets industry standards.
7.What is the process for return or replacement of 1N5380B?
All 1N5380B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5380B, 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 1N5380B part is unused and in its original packaging.
Return procedure for 1N5380B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5380B Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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