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onsemi 1N5378BG
- Part No.:
- 1N5378BG
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5378BG.pdf
- Description:
- DIODE ZENER 100V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,174
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Product details
Overview
1N5378BG from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 100 V, ±5% tolerance, 12 Ω maximum zener impedance at 90 mA test current, and 2.5 μA maximum leakage current at 76 V. It operates across −65 °C to +200 °C and delivers stable voltage regulation in DC power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the 1N5378BG datasheet, pinout, applications, or equivalent options, key selection criteria include its 100 V nominal breakdown, 5 W steady-state power rating, axial lead (Case 017AA) package, and Pb-free compliance - all critical for industrial power rail stabilization and transient suppression designs.
Technical Context
The 1N5378BG uses silicon-oxide passivated junction technology to achieve tight voltage tolerance (±5%), low dynamic impedance (12 Ω @ IZT = 90 mA), and high surge robustness (up to 800 A peak non-repetitive surge current at 8.3 ms). Its thermal design supports junction-to-lead resistance of 25 °C/W at 3/8″ lead length.
It exhibits a positive temperature coefficient above 10 V (≈1.5 mV/°C typical per Figure 3), enabling predictable drift compensation in precision reference circuits. The device is rated for DC operation up to +150 °C and pulsed conditions up to +200 °C with low duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 95–105 V (nominal 100 V, ±5% tolerance ensures stable regulation in 100 V rail clamping) |
| Power Dissipation (PD) | 5 W at TL = 25 °C (supports continuous regulation in compact power supplies without forced cooling) |
| Zener Impedance (ZZT) | 12 Ω max @ IZT = 90 mA (low dynamic resistance maintains tight output voltage under load transients) |
| Leakage Current (IR) | 2.5 μA max @ VR = 76 V (minimal standby current preserves efficiency in always-on protection circuits) |
| Surge Current (IRM) | 800 A peak @ 8.3 ms (withstands lightning-induced surges and inductive kickback in industrial controls) |
| Junction-to-Lead RθJL | 25 °C/W (enables thermal management via PCB copper pour or heatsink-attached leads) |
| Operating Temperature | −65 °C to +200 °C (suitable for under-hood automotive, downhole, and high-temp industrial environments) |
Pinout & Package
1N5378BG is housed in an axial-lead, transfer-molded plastic package (Case 017AA), with cathode indicated by a band. Leads are solderable per J-STD-020, rated for 260 °C for 10 seconds at 1/16″ from case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of regulated circuit; defines ground-referenced voltage clamp point |
| Cathode | Zener breakdown terminal / regulation output node | Connected to higher-potential rail; provides stable 100 V reference when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| ESD robustness | Class 3 (>16 kV HBM) enables handling in unshielded assembly lines without special ESD controls |
| Surge rating | 180 W @ 8.3 ms (per datasheet Fig. 5) supports IEC 61000-4-5 Level 4 surge immunity compliance |
| Pb-free construction | G-suffix confirms RoHS-compliant, halogen-free plastic package meeting IPC/JEDEC J-STD-609 |
| Tight parameter control | Guaranteed limits on six electrical parameters (VZ, IZM, ZZT, ZZK, IZK, IR) reduce binning and qualification overhead |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Clamp |
|---|---|
|
Use Scenario: Stabilizing 100 V DC bus in programmable logic controller (PLC) power modules. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp and regulate output voltage. Use Value: Maintains ±1% output stability under 10–90 mA load variation due to 12 Ω ZZT and 5 W dissipation headroom. |
Use Scenario: Protecting I/O interface circuitry from 100 V transients induced by relay coil de-energization. IC Role / Device Role / Timing Role: Fast-acting shunt clamp absorbing energy during inductive kickback events. Use Value: Withstands 800 A peak surge at 8.3 ms (IEC 61000-4-4 compliant), preventing damage to downstream op-amps and ADCs. |
| High-Temperature Sensor Reference | DC Link Voltage Monitor |
|
Use Scenario: Providing a stable 100 V reference for analog front-end conditioning in oil & gas downhole telemetry systems. IC Role / Device Role / Timing Role: Precision voltage reference element in ratiometric measurement chains. Use Value: Operates continuously at +175 °C ambient (derated per Figure 1), with predictable +1.5 mV/°C TC enabling software compensation. |
Use Scenario: Monitoring 100 V DC link voltage in motor drive inverters for overvoltage fault detection. IC Role / Device Role / Timing Role: Passive voltage threshold detector feeding comparator input. Use Value: Low 2.5 μA leakage at 76 V ensures minimal error contribution (<0.01%) to resistive divider networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5378BRLG | Same electrical specs; tape-and-reel packaging (4000 pcs/reel) vs. bulk box (1000 pcs) | No functional difference; selected for automated SMT placement compatibility | Choose 1N5378BRLG for high-volume production with pick-and-place equipment |
| BZX85C100 | 1.3 W rating, 100 V nominal, 100 Ω ZZT @ 5 mA - significantly lower power and higher impedance | Suitable only for low-current biasing or signal-level clamping, not 100 mA+ regulation | Select BZX85C100 only where power dissipation remains below 1.3 W and dynamic impedance is non-critical |
Compared with 1N5378BG, the 1N5378BRLG offers identical regulation performance in automated assembly formats, while the BZX85C100 trades 5 W capability and 12 Ω impedance for smaller size and lower cost - making it viable only in sub-1 W, low-precision roles.
Availability
1N5378BG is available at Aetrix Electronics and suitable for industrial power supply regulation, overvoltage protection clamp, and high-temperature sensor reference requiring stable component supply, long-lifecycle assurance, and RoHS-compliant sourcing.
Supply support for 1N5378BG 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1N53 series belongs to onsemi's Surmetic™ 40 Zener regulator family, engineered for high-reliability voltage reference and transient suppression in harsh-environment power systems.
FAQ
What is the nominal zener voltage and tolerance of the 1N5378BG?
The 1N5378BG has a nominal zener voltage of 100 V with a guaranteed tolerance of ±5%, meaning its actual breakdown voltage falls between 95 V and 105 V at the specified test current of 90 mA. This tight tolerance is confirmed in the onsemi datasheet Table on page 3 and supports precise voltage clamping in regulated power supplies.
Does the 1N5378BG have Pb-free construction?
Yes, the "G" suffix in 1N5378BG explicitly denotes a Pb-free, RoHS-compliant package per onsemi's ordering nomenclature and the "Pb−Free Packages are Available" note on page 1 of the datasheet. The device meets IPC/JEDEC J-STD-609 Class 3 moisture sensitivity and halogen-free requirements.
What is the maximum surge current rating for the 1N5378BG?
The 1N5378BG is rated for a peak non-repetitive surge current of 800 A at an 8.3 ms pulse width, as listed in the Electrical Characteristics table on page 3 of the onsemi datasheet. This rating is validated per Figure 5 and supports IEC 61000-4-4/5 surge immunity designs.
Can the 1N5378BG be used in high-temperature environments?
Yes, the 1N5378BG is rated for operation from −65 °C to +200 °C, with DC operation approved up to +150 °C and pulsed conditions allowed up to +200 °C. Its thermal resistance (θJL = 25 °C/W) and silicon-oxide passivated junction enable reliable function in under-hood automotive and downhole industrial applications.
What is the zener impedance of the 1N5378BG and why does it matter?
The 1N5378BG has a maximum zener impedance (ZZT) of 12 Ω at IZT = 90 mA. This low dynamic resistance ensures minimal output voltage deviation under changing load currents - critical for maintaining regulation accuracy in feedback loops and precision reference circuits.
1N5378BG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 100 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 76 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
1N5378BG FAQ
1.How can I place an order for 1N5378BG through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5378BG 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 1N5378BG reliable?
The price and inventory of 1N5378BG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5378BG is usually 5 days.
3.What payment methods are accepted for 1N5378BG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5378BG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5378BG?
1N5378BG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5378BG 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 1N5378BG?
For technical support, including 1N5378BG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5378BG requirements.
6.How does Aetrix verify that 1N5378BG is sourced from the original manufacturer or authorized distributors?
All 1N5378BG 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 1N5378BG meets industry standards.
7.What is the process for return or replacement of 1N5378BG?
All 1N5378BG units undergo pre-shipment inspection (PSI). If there is an issue with 1N5378BG, 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 1N5378BG part is unused and in its original packaging.
Return procedure for 1N5378BG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5378BG Tags
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