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

onsemi 1N5384B

Name: 1N5384B
Brand: onsemi
SKU: 1N5384B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5384B

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: T-18, Axial

Datasheet:: 1N5384B.pdf

Description:: DIODE ZENER 160V 5W AXIAL

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Product details

Overview

1N5384B from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 160 V, ±5% tolerance, maximum zener impedance of 8 Ω at 350 mA test current, and surge rating of 1650 A at 8.3 ms. It operates as a precision voltage reference or overvoltage clamp in high-voltage DC power supplies and industrial control circuits.

For engineers reviewing the 1N5384B datasheet, pinout, applications, or equivalent options, key selection criteria include its 160 V nominal regulation, low 8 Ω dynamic impedance at IZT = 350 mA, 1.1 V forward voltage at 1.0 A, 0.5 mA leakage at 122 V, and axial Surmetic 40 package with cathode band polarity marking.

Technical Context

The 1N5384B uses silicon-oxide passivated junction technology to achieve tight voltage tolerance (±5%), low zener impedance (8 Ω), and stable regulation across temperature. Its thermal design supports 5 W steady-state dissipation at TL = 25°C with 25 °C/W junction-to-lead thermal resistance.

It delivers regulated output under reverse-bias conditions with specified test currents (IZT = 350 mA, IZK = 1 A) and exhibits ESD robustness (>16 kV HBM) and non-repetitive surge capability up to 1650 A for 8.3 ms pulses - critical for transient suppression in high-voltage industrial systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	152–168 V (nominal 160 V, ±5% tolerance ensures predictable clamping in 150–170 V systems)
Power Dissipation (P_D)	5 W (supports continuous regulation in compact axial packages without forced cooling)
Zener Impedance (Z_ZT)	8 Ω max @ I_ZT = 350 mA (low dynamic impedance maintains stable voltage under load variation)
Leakage Current (I_R)	0.5 mA max @ V_R = 122 V (ensures minimal standby power loss in high-impedance bias networks)
Surge Current (I_RM)	1650 A @ 8.3 ms (withstands lightning-induced transients in telecom and industrial power inputs)
Forward Voltage (V_F)	1.2 V max @ I_F = 1.0 A (enables use as polarity-sensitive rectifier or crowbar element)
ESD Rating	Class 3 (>16 kV HBM) (survives handling and board-level electrostatic events without parameter shift)

Pinout & Package

Package: Axial lead, Surmetic 40, Case 017AA - void-free transfer-molded thermosetting plastic with corrosion-resistant leads, cathode indicated by band, mountable in any orientation.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener cathode reference node	Connected to lower-potential side in reverse-bias regulation; defines reference ground point in shunt regulator topologies
Cathode	Zener breakdown terminal / Regulation output node	Connected to higher-potential rail; delivers stable 160 V reference when reverse-biased above V_Z

Key Features

Feature	Design Value
±5% Zener voltage tolerance	Guarantees tight regulation window (152–168 V) without post-manufacture sorting or trimming
8 Ω max zener impedance at 350 mA	Minimizes output voltage deviation under dynamic load changes in feedback-sensing applications
1650 A surge rating (8.3 ms)	Enables direct placement at AC/DC input stages without external MOVs in Class II industrial equipment
ESD rating >16 kV (HBM)	Eliminates need for upstream ESD protection in automated assembly lines and field-deployed modules
Pb-free axial package (Case 017AA)	Complies with RoHS and J-STD-020 reflow profiles while maintaining mechanical robustness

Applications

Industrial Power Supply Clamping	High-Voltage Reference Generation
Use Scenario: Clamp transient spikes on 120–180 V DC bus rails in motor drives and PLC power modules. IC Role / Device Role / Timing Role: Shunt regulator acting as overvoltage protector downstream of bulk capacitors. Use Value: Limits voltage excursions to ≤168 V with <8 Ω impedance, preventing gate oxide damage in 200 V-rated MOSFETs.	Use Scenario: Provide stable 160 V reference for analog front-end calibration in HV battery management systems. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC reference dividers and comparator thresholds. Use Value: ±5% tolerance and low tempco (≈0.09%/°C above 100 V) ensure <±1.5 V drift over −40°C to +125°C operating range.
Telecom Line Surge Protection	Test Equipment Voltage Limiting
Use Scenario: Absorb induced surges on 48–60 V telecom distribution lines during lightning events. IC Role / Device Role / Timing Role: Primary surge suppression element in hybrid protection circuits with gas discharge tubes. Use Value: 1650 A peak surge capacity at 8.3 ms enables compliance with ITU-T K.20/21 immunity requirements without derating.	Use Scenario: Limit output voltage in programmable HV DC sources used for capacitor aging tests. IC Role / Device Role / Timing Role: Fail-safe hard clamp preventing accidental overvoltage delivery to DUTs. Use Value: 160 V nominal clamping with 0.5 mA leakage at 122 V ensures minimal loading on precision HV amplifiers.

Industrial Power Supply Clamping

High-Voltage Reference Generation

Use Scenario: Clamp transient spikes on 120–180 V DC bus rails in motor drives and PLC power modules.

IC Role / Device Role / Timing Role: Shunt regulator acting as overvoltage protector downstream of bulk capacitors.

Use Value: Limits voltage excursions to ≤168 V with <8 Ω impedance, preventing gate oxide damage in 200 V-rated MOSFETs.

Use Scenario: Provide stable 160 V reference for analog front-end calibration in HV battery management systems.

IC Role / Device Role / Timing Role: Precision voltage reference source for ADC reference dividers and comparator thresholds.

Use Value: ±5% tolerance and low tempco (≈0.09%/°C above 100 V) ensure <±1.5 V drift over −40°C to +125°C operating range.

Telecom Line Surge Protection

Test Equipment Voltage Limiting

Use Scenario: Absorb induced surges on 48–60 V telecom distribution lines during lightning events.

IC Role / Device Role / Timing Role: Primary surge suppression element in hybrid protection circuits with gas discharge tubes.

Use Value: 1650 A peak surge capacity at 8.3 ms enables compliance with ITU-T K.20/21 immunity requirements without derating.

Use Scenario: Limit output voltage in programmable HV DC sources used for capacitor aging tests.

IC Role / Device Role / Timing Role: Fail-safe hard clamp preventing accidental overvoltage delivery to DUTs.

Use Value: 160 V nominal clamping with 0.5 mA leakage at 122 V ensures minimal loading on precision HV amplifiers.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5384A	±10% tolerance (144–176 V), same 5 W rating and package	Less precise regulation; suitable where cost sensitivity outweighs voltage accuracy	Select 1N5384A only if system tolerances allow ±10% variation and no recalibration is needed.
SMCJ160A	TVS diode (not Zener); 160 V standoff, 200 W peak power, unidirectional	Designed for fast transient suppression, not steady-state regulation	Choose SMCJ160A for surge-only protection; avoid for DC bias/reference roles due to higher leakage and no DC regulation spec.

Compared with 1N5384B, the 1N5384A trades voltage precision for lower cost in non-critical clamping, while the SMCJ160A offers faster response but lacks DC regulation capability - making 1N5384B the sole choice for stable 160 V reference generation.

Availability

1N5384B is available at Aetrix Electronics and suitable for industrial power supply clamping, high-voltage reference generation, telecom line surge protection, and test equipment voltage limiting requiring stable component supply and long-term BOM continuity.

Supply support for 1N5384B 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 for automotive, industrial, and cloud infrastructure markets.

The 1N53 Series is part of onsemi's legacy Zener portfolio designed specifically for high-reliability, high-power voltage regulation in harsh-environment applications - emphasizing tight tolerance, surge resilience, and Pb-free manufacturability.

FAQ

What is the nominal zener voltage and tolerance of the 1N5384B?

The 1N5384B has a nominal zener voltage of 160 V with a guaranteed tolerance of ±5%, meaning its actual zener voltage falls between 152 V and 168 V at I_ZT = 350 mA and T_A = 25°C. This tight tolerance is confirmed in the onsemi datasheet Rev. 19, Table on page 3, and applies specifically to the "B" suffix variant of the 1N53 series.

What is the maximum steady-state power dissipation for the 1N5384B?

The 1N5384B is rated for 5 W maximum steady-state power dissipation at lead temperature (T_L) = 25°C with 3/8 inch lead length. Derating is required above 25°C at 40 mW/°C, per the Absolute Maximum Ratings table on page 1 of the onsemi datasheet. This rating assumes proper heat sinking via leads.

Does the 1N5384B have a Pb-free package option?

Yes, the 1N5384B is available in a Pb-free axial lead package (Case 017AA), indicated by the "G" suffix in ordering codes such as 1N5384BG. The datasheet confirms Pb-free compliance and provides soldering guidelines including a maximum lead temperature of 260°C for 10 seconds at 1/16 inch from the case.

What is the zener impedance of the 1N5384B and why does it matter?

The 1N5384B has a maximum zener impedance (Z_ZT) of 8 Ω measured at I_ZT = 350 mA. This low dynamic impedance ensures minimal voltage variation under changing load current - critical for maintaining regulation accuracy in shunt reference and feedback-sensing circuits where stability is required.

How is polarity marked on the 1N5384B package?

The 1N5384B uses a cathode band (a painted or molded ring) on the body to indicate the cathode terminal. As shown in the Marking Diagram on page 1 of the datasheet and confirmed in the Mechanical Characteristics section, the banded end is the cathode; the opposite lead is the anode. This marking is consistent across all 1N53xxB devices in the Surmetic 40 package.

1N5384B Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: T-18, Axial

Packaging:: Bulk

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 160 V

Tolerance:: ±5%

Power - Max:: 5 W

Impedance (Max) (Zzt):: 350 Ohms

Current - Reverse Leakage @ Vr:: 500 nA @ 122 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

1N5384B FAQ

1.How can I place an order for 1N5384B through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5384B 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 1N5384B reliable?

The price and inventory of 1N5384B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5384B is usually 5 days.

3.What payment methods are accepted for 1N5384B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5384B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5384B?

1N5384B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5384B 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 1N5384B?

For technical support, including 1N5384B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5384B requirements.

6.How does Aetrix verify that 1N5384B is sourced from the original manufacturer or authorized distributors?

All 1N5384B 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 1N5384B meets industry standards.

7.What is the process for return or replacement of 1N5384B?

All 1N5384B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5384B, 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 1N5384B part is unused and in its original packaging.

Return procedure for 1N5384B:

1.Submit a request within 90 days.

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

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