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

onsemi 1N5919BRL

Name: 1N5919BRL
Brand: onsemi
SKU: 1N5919BRL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5919BRL

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: 1N5919BRL.pdf

Description:: DIODE ZENER 5.6V 3W AXIAL

Quantity:: RFQ Add To RFQ list

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Product details

Overview

1N5919BRL from onsemi is a 3 W, 5.6 V ±5% Zener diode in DO-41 axial package, designed for precision voltage regulation and overvoltage protection in low-power DC rails. It delivers 267 mA maximum DC zener current, 66.9 Ω dynamic impedance at 2 mA test current, and supports surge power up to 98 W for 1 ms pulses. It is used in power supply feedback loops, reference voltage generation, and ESD-protected I/O clamping circuits.

For engineers reviewing the 1N5919BRL datasheet, pinout, applications, or equivalent options, key selection criteria include its 5.6 V nominal zener voltage, 3 W steady-state dissipation at 75°C lead temperature, Class 3 ESD rating (>16 kV HBM), and compatibility with Pb-free reflow soldering at 260°C for 10 seconds.

Technical Context

This device employs a silicon-oxide passivated junction for stable reverse breakdown characteristics and low leakage. Its thermal design centers on junction-to-lead conduction (primary path via cathode lead), with transient thermal resistance θ_JL dependent on pulse width and duty cycle per Figure 2.

Regulation performance is defined at I_ZT = 2 mA with V_Z = 5.32–5.88 V, Z_ZT ≤ 66.9 Ω, and I_R ≤ 5 μA at V_R = 3 V. Temperature coefficient is negative (≈ −2 mV/°C) in this voltage range, confirmed by Figure 5.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	5.6 V - precise regulation point at 2 mA, ±5% tolerance ensures tight voltage reference stability
Max Steady-State Power	3 W @ T_L = 75°C - enables robust operation in compact PCB layouts with minimal heatsinking
Zener Impedance	66.9 Ω @ I_ZT = 2 mA - low dynamic resistance improves load regulation and ripple rejection
Surge Power Rating	98 W @ 1 ms - withstands short-duration transients without degradation in protection circuits
ESD Rating	Class 3 (>16 kV HBM) - provides intrinsic I/O-level ESD immunity without external TVS stacking
Reverse Leakage	≤5 μA @ V_R = 3 V - ensures minimal quiescent current draw in battery-powered bias networks
Package	DO-41 (Case 59) - industry-standard axial plastic package with corrosion-resistant leads and cathode band polarity marking

Pinout & Package

DO-41 (Case 59) axial-leaded plastic package: 4.10–5.20 mm body length, 2.00–2.70 mm body diameter, 0.71–0.86 mm lead diameter, cathode identified by color band. Mounting position unrestricted; max soldering temperature 260°C at 1/16″ from case for 10 s.

Pin/Terminal	Circuit Role	Design Meaning
Cathode (banded end)	High-side reference node	Connected to regulated output or feedback node; carries full zener current during regulation
Anode	Low-side return path	Typically tied to ground or common rail; completes current path for reverse-biased operation

Key Features

Feature	Design Value
Pb-Free DO-41 packaging	RoHS-compliant construction with solderable leads rated for 260°C reflow, eliminating lead contamination risk in assembly
6-parameter guaranteed limits	V_Z, I_ZT, Z_ZT, I_ZK, Z_ZK, I_R all tested and binned - ensures predictable behavior across production lots
Surge-rated construction	98 W single-pulse capability at 1 ms - protects downstream circuitry from inductive kickback or lightning-induced surges
Compact 3 W footprint	Same physical size as conventional 1 W Zeners - enables power-upgrade without PCB layout changes
Wide operating temperature	−65°C to +200°C junction range - suitable for under-hood automotive, industrial control, and outdoor equipment

Applications

Power Supply Feedback Loop	Microcontroller I/O Clamp
Use Scenario: Stabilizing output voltage in linear regulators or flyback SMPS feedback networks using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Precision voltage reference element setting regulation threshold; operates continuously in reverse breakdown. Use Value: 5.6 V nominal voltage matches common TL431-based feedback thresholds; ±5% tolerance and low Z_ZT ensure <±1% output accuracy under load variation.	Use Scenario: Protecting GPIO pins of microcontrollers against ESD events and bus overvoltage in industrial sensor interfaces. IC Role / Device Role / Timing Role: Bidirectional clamping device-conducts in reverse breakdown above 5.6 V and forward at ~0.7 V to limit excursion. Use Value: Class 3 ESD rating (>16 kV HBM) eliminates need for supplemental TVS; DO-41 form factor allows manual repair or prototyping without SMT rework.
Reference Voltage Source	Overvoltage Detection Threshold
Use Scenario: Generating stable analog reference for ADCs or comparators in battery-powered instrumentation. IC Role / Device Role / Timing Role: Low-drift DC reference node; biased with constant-current source to minimize temperature coefficient effects. Use Value: Negative tempco (~−2 mV/°C) partially compensates for op-amp offset drift; 5 μA max leakage preserves battery life in always-on sensing nodes.	Use Scenario: Triggering shutdown logic when input voltage exceeds safe operating range in DC-DC converter inputs or battery chargers. IC Role / Device Role / Timing Role: Threshold detector - reverse conduction activates comparator or latch when V_IN > V_Z + margin. Use Value: 98 W surge rating tolerates brief overvoltage transients without failure; 3 W continuous rating supports latching circuits with hold current up to 267 mA.

Power Supply Feedback Loop

Microcontroller I/O Clamp

Use Scenario: Stabilizing output voltage in linear regulators or flyback SMPS feedback networks using optocoupler-coupled error amplifiers.

IC Role / Device Role / Timing Role: Precision voltage reference element setting regulation threshold; operates continuously in reverse breakdown.

Use Value: 5.6 V nominal voltage matches common TL431-based feedback thresholds; ±5% tolerance and low Z_ZT ensure <±1% output accuracy under load variation.

Use Scenario: Protecting GPIO pins of microcontrollers against ESD events and bus overvoltage in industrial sensor interfaces.

IC Role / Device Role / Timing Role: Bidirectional clamping device-conducts in reverse breakdown above 5.6 V and forward at ~0.7 V to limit excursion.

Use Value: Class 3 ESD rating (>16 kV HBM) eliminates need for supplemental TVS; DO-41 form factor allows manual repair or prototyping without SMT rework.

Reference Voltage Source

Overvoltage Detection Threshold

Use Scenario: Generating stable analog reference for ADCs or comparators in battery-powered instrumentation.

IC Role / Device Role / Timing Role: Low-drift DC reference node; biased with constant-current source to minimize temperature coefficient effects.

Use Value: Negative tempco (~−2 mV/°C) partially compensates for op-amp offset drift; 5 μA max leakage preserves battery life in always-on sensing nodes.

Use Scenario: Triggering shutdown logic when input voltage exceeds safe operating range in DC-DC converter inputs or battery chargers.

IC Role / Device Role / Timing Role: Threshold detector - reverse conduction activates comparator or latch when V_IN > V_Z + margin.

Use Value: 98 W surge rating tolerates brief overvoltage transients without failure; 3 W continuous rating supports latching circuits with hold current up to 267 mA.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5232B (ON Semiconductor)	500 mW rating, 5.6 V, DO-35 package, higher Z_ZT (17 Ω @ 20 mA)	Lower power handling; suited only for signal-level references, not power rail clamping	Select when board space is constrained and dissipation remains <0.5 W
BZX55-C5V6 (Vishay)	500 mW rating, 5.6 V, DO-35, ±5% tolerance, 40 Ω Z_ZT @ 5 mA	Higher test current shifts operating point; lower surge rating (40 W @ 1 ms)	Choose for cost-sensitive consumer designs where 98 W surge immunity is not required

Compared with 1N5919BRL, both alternatives offer identical nominal voltage but lack its 3 W continuous rating, 98 W surge capability, and Class 3 ESD robustness-making 1N5919BRL the preferred choice for industrial power regulation and ruggedized I/O protection.

Availability

1N5919BRL is available at Aetrix Electronics and suitable for power supply feedback loops, microcontroller I/O clamping, reference voltage sources, and overvoltage detection circuits requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for 1N5919BRL 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, sensors, and connectivity solutions for automotive, industrial, cloud, and IoT applications.

The 1N5913B Series is part of onsemi's legacy Zener regulator portfolio, engineered for high-reliability voltage reference and protection in harsh environments-emphasizing surge resilience, wide temperature operation, and Pb-free manufacturability.

FAQ

What is the nominal zener voltage and tolerance of the 1N5919BRL?

The 1N5919BRL has a nominal zener voltage of 5.6 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 5.32 V and 5.88 V when measured at 2 mA (I_ZT) and 30°C lead temperature. This tight tolerance ensures consistent regulation across production units and simplifies design margining in feedback networks.

How much power can the 1N5919BRL dissipate continuously, and what derating applies?

The 1N5919BRL is rated for 3 W steady-state power dissipation at a lead temperature (T_L) of 75°C with 3/8″ lead length. Above 75°C, it must be derated at 24 mW/°C. At ambient temperature (T_A) = 50°C, its power rating drops to 1 W, derating at 6.67 mW/°C beyond that point-critical for thermal design in enclosed enclosures.

Does the 1N5919BRL support Pb-free soldering processes?

Yes, the 1N5919BRL is offered in a Pb-free DO-41 package (indicated by the "G" suffix in ordering codes) and is qualified for standard reflow soldering at 260°C for 10 seconds at 1/16″ from the case. Its leads are readily solderable and corrosion-resistant, meeting RoHS Directive 2011/65/EU requirements.

What is the maximum surge power rating of the 1N5919BRL, and under what conditions?

The 1N5919BRL is rated for 98 W nonrepetitive surge power at a pulse width of 1 ms, as specified in Figure 3 of the datasheet. This rating assumes rectangular waveform, T_J = 25°C prior to pulse, and applies only to single-event transients-not repetitive surges-ensuring reliability in ESD and inductive switching protection roles.

How is polarity identified on the 1N5919BRL, and what is its mounting flexibility?

Polarity on the 1N5919BRL is indicated by a cathode band (typically black or dark stripe) on the body near one lead; the banded end is the cathode. The device supports any mounting position-vertical, horizontal, or angled-and requires no heatsink for 3 W operation when lead length and ambient conditions comply with derating curves in Figure 1.

1N5919BRL Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: DO-204AL, DO-41, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 5.6 V

Tolerance:: ±5%

Power - Max:: 3 W

Impedance (Max) (Zzt):: 2 Ohms

Current - Reverse Leakage @ Vr:: 5 µA @ 3 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:: Axial

1N5919BRL FAQ

1.How can I place an order for 1N5919BRL through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5919BRL 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 1N5919BRL reliable?

The price and inventory of 1N5919BRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5919BRL is usually 5 days.

3.What payment methods are accepted for 1N5919BRL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5919BRL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5919BRL?

1N5919BRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5919BRL 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 1N5919BRL?

For technical support, including 1N5919BRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5919BRL requirements.

6.How does Aetrix verify that 1N5919BRL is sourced from the original manufacturer or authorized distributors?

All 1N5919BRL 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 1N5919BRL meets industry standards.

7.What is the process for return or replacement of 1N5919BRL?

All 1N5919BRL units undergo pre-shipment inspection (PSI). If there is an issue with 1N5919BRL, 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 1N5919BRL part is unused and in its original packaging.

Return procedure for 1N5919BRL:

1.Submit a request within 90 days.

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

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