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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

onsemi 1N5383B

Name: 1N5383B
Brand: onsemi
SKU: 1N5383B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5383B

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: T-18, Axial

Datasheet:: 1N5383B.pdf

Description:: DIODE ZENER 150V 5W AXIAL

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Product details

Overview

1N5383B from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 150 V, ±5% tolerance, maximum zener impedance of 8 Ω at 330 mA test current, and surge rating of 1500 A (8.3 ms). It operates across −65 °C to +200 °C and is used for overvoltage protection and precision voltage reference in high-voltage DC power supplies.

For engineers reviewing the 1N5383B datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal behavior, mechanical package data, and real-world selection guidance for high-voltage regulation and transient suppression circuits.

Technical Context

The 1N5383B employs a silicon-oxide passivated junction for stable breakdown characteristics and low leakage. Its zener voltage is specified at IZT = 330 mA with VZ = 142.5–157.5 V, and it exhibits a temperature coefficient of +0.11 mV/°C per volt - typical for high-voltage Zeners above 100 V.

It features Class 3 ESD immunity (>16 kV HBM), 180 W non-repetitive surge capability, and a junction-to-lead thermal resistance of 25 °C/W at 3/8″ lead length. The device is rated for steady-state dissipation of 5 W at TL = 25 °C, derating linearly above that temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	142.5–157.5 V @ I_ZT = 330 mA - defines regulated output range under nominal bias
Power Dissipation (P_D)	5 W @ T_L = 25 °C - sets maximum continuous DC power handling before thermal derating
Zener Impedance (Z_ZT)	8 Ω max @ I_ZT = 330 mA - determines regulation stiffness and output voltage variation under load changes
Surge Current (I_R)	1500 A peak @ 8.3 ms - supports transient overvoltage clamping in high-energy pulse environments
Leakage Current (I_R)	3.0 µA max @ V_R = 114 V - ensures minimal standby current in high-impedance bias networks
Operating Temperature	−65 °C to +200 °C - enables use in automotive under-hood, industrial motor drive, and aerospace power stages
ESD Rating	Class 3 (>16 kV HBM) - provides robust handling during manual assembly and board-level integration

Pinout & Package

Package: Axial-lead, transfer-molded plastic (Case 017AA), void-free thermosetting material with corrosion-resistant leads and cathode band marking. Mounting position is unrestricted.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener cathode reference node	Connected to lower-potential side of circuit; reverse-biased operation requires anode grounded or at lower potential than cathode
Cathode	Zener breakdown terminal / voltage reference output	Marked with band; carries regulated voltage when reverse biased; must be held at higher potential than anode for conduction

Key Features

Feature	Design Value
Silicon-oxide passivated junction	Enables tight V_Z tolerance (±5%), low long-term drift, and stable leakage performance over temperature and time
Surge rating up to 180 W	Supports reliable clamping of short-duration transients without degradation in high-voltage rail protection
Pb-free axial package (Case 017AA)	Complies with RoHS; lead finish is readily solderable at 260 °C for 10 s at 1/16″ from case
Guaranteed limits on six parameters	Ensures production consistency in V_Z, Z_ZT, I_R, I_ZK, Z_ZK, and I_ZM - critical for safety-critical voltage references

Applications

High-Voltage DC Power Supply Regulation	Industrial Motor Drive Snubber Protection
Use Scenario: Stabilizing auxiliary 150 V rail in switched-mode power supplies for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp and regulate output voltage against line/load variations. Use Value: Maintains ±1.5% output stability over 0–330 mA load range due to low 8 Ω dynamic impedance and tight ±5% V_Z tolerance.	Use Scenario: Absorbing inductive kickback energy from 120–200 V motor windings during MOSFET turn-off in variable-frequency drives. IC Role / Device Role / Timing Role: Passive voltage clamp limiting transient spikes to ≤157.5 V, protecting gate drivers and isolation barriers. Use Value: Withstands 1500 A surge pulses (8.3 ms) without failure, enabling robust snubbing without active components or complex RC networks.
Automotive Onboard Charger (OBC) Overvoltage Detection	Aerospace Power Converter Reference
Use Scenario: Monitoring 144–168 V battery-derived DC link in EV onboard chargers for fault-triggered shutdown. IC Role / Device Role / Timing Role: Precision voltage threshold detector feeding comparator input; reverse-biased as reference node. Use Value: Delivers <3.0 µA leakage at 114 V, minimizing false triggers while maintaining 150 V ±5% trip point accuracy across −40 °C to +125 °C.	Use Scenario: Providing stable 150 V reference in radiation-tolerant DC–DC converters for satellite power management units. IC Role / Device Role / Timing Role: High-reliability voltage reference element in feedback loop of isolated flyback regulator. Use Value: Operates continuously from −65 °C to +200 °C with guaranteed V_Z limits, supporting extended mission life in vacuum thermal cycling environments.

High-Voltage DC Power Supply Regulation

Industrial Motor Drive Snubber Protection

Use Scenario: Stabilizing auxiliary 150 V rail in switched-mode power supplies for PLC I/O modules and sensor interfaces.

IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp and regulate output voltage against line/load variations.

Use Value: Maintains ±1.5% output stability over 0–330 mA load range due to low 8 Ω dynamic impedance and tight ±5% V_Z tolerance.

Use Scenario: Absorbing inductive kickback energy from 120–200 V motor windings during MOSFET turn-off in variable-frequency drives.

IC Role / Device Role / Timing Role: Passive voltage clamp limiting transient spikes to ≤157.5 V, protecting gate drivers and isolation barriers.

Use Value: Withstands 1500 A surge pulses (8.3 ms) without failure, enabling robust snubbing without active components or complex RC networks.

Automotive Onboard Charger (OBC) Overvoltage Detection

Aerospace Power Converter Reference

Use Scenario: Monitoring 144–168 V battery-derived DC link in EV onboard chargers for fault-triggered shutdown.

IC Role / Device Role / Timing Role: Precision voltage threshold detector feeding comparator input; reverse-biased as reference node.

Use Value: Delivers <3.0 µA leakage at 114 V, minimizing false triggers while maintaining 150 V ±5% trip point accuracy across −40 °C to +125 °C.

Use Scenario: Providing stable 150 V reference in radiation-tolerant DC–DC converters for satellite power management units.

IC Role / Device Role / Timing Role: High-reliability voltage reference element in feedback loop of isolated flyback regulator.

Use Value: Operates continuously from −65 °C to +200 °C with guaranteed V_Z limits, supporting extended mission life in vacuum thermal cycling environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener voltage regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5383	Same V_Z range (142.5–157.5 V) but ±10% tolerance; no Pb-free guarantee; lower surge rating (1200 A vs. 1500 A)	Acceptable where cost sensitivity outweighs reliability requirements; not suitable for automotive or aerospace qualification	Select 1N5383 only for non-safety-critical prototyping or legacy designs requiring backward compatibility
SMCJ150A	TVS diode, not Zener; 150 V standoff, 243 V clamping; unidirectional; 1500 W peak power; DO-214AB package	Designed for fast transient suppression (ns response), not precision regulation; higher clamping voltage reduces regulation accuracy	Choose SMCJ150A when primary need is ESD/surge protection rather than stable DC reference; not interchangeable for regulation

Compared with 1N5383B, the 1N5383 offers broader tolerance and reduced surge margin, making it less suitable for precision rails; the SMCJ150A serves a different function entirely - transient clamping versus regulation - and cannot replace 1N5383B in feedback or reference roles.

Availability

1N5383B is available at Aetrix Electronics and suitable for high-voltage DC power supply regulation, industrial motor drive snubber protection, and automotive onboard charger overvoltage detection requiring stable component supply and full traceability.

Supply support for 1N5383B 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 is part of onsemi's Surmetic™ 40 Zener family, engineered for high-power, high-voltage regulation and transient suppression in demanding industrial and transportation systems.

FAQ

What is the nominal zener voltage and tolerance of the 1N5383B?

The 1N5383B has a nominal zener voltage of 150 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 142.5 V and 157.5 V when tested at I_ZT = 330 mA. This tight tolerance is guaranteed per JEDEC standard and reflects the device's silicon-oxide passivated junction construction, ensuring consistent performance in precision regulation applications.

What is the maximum steady-state power dissipation for the 1N5383B?

The 1N5383B is rated for a maximum steady-state power dissipation of 5 W at a lead temperature (T_L) of 25 °C, with linear derating of 40 mW/°C above that temperature. This rating assumes 3/8″ lead length to heatsink and defines the upper limit for continuous DC operation before thermal runaway risk increases significantly.

Does the 1N5383B have a Pb-free package?

Yes, the 1N5383B is offered in a Pb-free axial-lead package (Case 017AA), indicated by the "G" suffix in ordering codes such as 1N5383B-G. The leads are readily solderable at 260 °C for 10 seconds at 1/16″ from the case body, meeting RoHS compliance requirements without compromising thermal or mechanical reliability.

What is the zener impedance of the 1N5383B and why does it matter?

The 1N5383B has a maximum zener impedance (Z_ZT) of 8 Ω at I_ZT = 330 mA. This low dynamic impedance ensures minimal output voltage variation under changing load conditions - critical for maintaining regulation accuracy in high-voltage reference and feedback circuits where even small deviations affect system stability.

Can the 1N5383B be used for surge protection in addition to voltage regulation?

Yes, the 1N5383B supports non-repetitive surge currents up to 1500 A (8.3 ms square wave), making it suitable for both precision voltage regulation and transient overvoltage clamping. However, its primary design intent is regulation; for dedicated surge suppression, TVS diodes like SMCJ150A offer faster response and higher peak power, though with less precise voltage control.

1N5383B Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: T-18, Axial

Packaging:: Bulk

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 150 V

Tolerance:: ±5%

Power - Max:: 5 W

Impedance (Max) (Zzt):: 330 Ohms

Current - Reverse Leakage @ Vr:: 500 nA @ 114 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

1N5383B FAQ

1.How can I place an order for 1N5383B through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5383B 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 1N5383B reliable?

The price and inventory of 1N5383B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5383B is usually 5 days.

3.What payment methods are accepted for 1N5383B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5383B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5383B?

1N5383B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5383B 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 1N5383B?

For technical support, including 1N5383B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5383B requirements.

6.How does Aetrix verify that 1N5383B is sourced from the original manufacturer or authorized distributors?

All 1N5383B 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 1N5383B meets industry standards.

7.What is the process for return or replacement of 1N5383B?

All 1N5383B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5383B, 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 1N5383B part is unused and in its original packaging.

Return procedure for 1N5383B:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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