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

onsemi 1N5953BRL

Name: 1N5953BRL
Brand: onsemi
SKU: 1N5953BRL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5953BRL

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: 1N5953BRL.pdf

Description:: DIODE ZENER 150V 3W AXIAL

Quantity:: RFQ Add To RFQ list

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Inventory:9,714

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Product details

Overview

1N5953BRL from onsemi is a 3 W, 150 V ±5% Zener diode in DO-41 axial package, designed for precision voltage regulation and overvoltage protection in power supply feedback loops, reference circuits, and surge-clamping applications. It delivers stable reverse breakdown at 150 V with 2.5 Ω maximum Zener impedance at 600 mA test current and supports 98 W non-repetitive surge capability at 1 ms.

For engineers reviewing the 1N5953BRL datasheet, pinout, applications, or equivalent options, key selection criteria include its 150 V nominal Zener voltage, ±5% tolerance, 3 W steady-state dissipation at 75°C lead temperature, and DO-41 mechanical compatibility with legacy through-hole designs requiring robust transient suppression.

Technical Context

The 1N5953BRL operates as a silicon-oxide passivated junction Zener regulator, optimized for stable DC voltage reference and clamping under continuous or pulsed reverse bias. Its thermal design relies on lead-to-ambient conduction (primary path via cathode lead), with derating curves defined for lead lengths of 1/8″ to 1″ and specified junction-to-lead transient thermal resistance.

It exhibits a typical temperature coefficient of +0.1 mV/°C at 150 V (per Figure 6), confirming positive V_Z drift with temperature-critical for high-voltage reference stability analysis. The device guarantees six electrical parameters including V_Z, I_ZT, Z_ZT, I_ZK, Z_ZK, and I_R, with leakage limited to 0.25 μA at 114 V reverse voltage.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	150 V - precise regulation point for high-voltage feedback or clamp circuits
Zener Tolerance	±5% - ensures predictable voltage window across production lots
Max Steady-State Power	3 W @ TL = 75°C - defines continuous dissipation limit with standard 3/8″ lead length
Zener Impedance	2.5 Ω max @ I_ZT = 600 mA - low dynamic resistance enables tight regulation under load variation
Surge Rating	98 W @ 1 ms - supports transient overvoltage suppression without failure
Reverse Leakage	0.25 μA @ V_R = 114 V - minimal parasitic current in high-impedance reference nodes
Package	DO-41 (Case 59) - industry-standard axial plastic package with cathode band polarity marking

Pinout & Package

DO-41 package: axial-leaded, transfer-molded thermosetting plastic case with corrosion-resistant leads; cathode identified by black band; mounting position unrestricted; max soldering temperature 260°C at 1/16″ from case for 10 seconds.

Pin/Terminal	Circuit Role	Design Meaning
Cathode (banded end)	Reverse-biased Zener terminal	Connected to higher-potential node in regulation/clamp configuration; carries full Zener current
Anode	Reference/ground terminal	Typically tied to system ground or error amplifier input; completes reverse-bias path

Key Features

Feature	Design Value
ESD robustness	Class 3 (>16 kV HBM) - withstands handling and board-level ESD events without parameter shift
Surge survivability	98 W @ 1 ms - clamps lightning-induced transients or inductive kickback without degradation
Pb-free compliance	RoHS-compliant "G" suffix variant available - meets environmental requirements for industrial and consumer products
Thermal reliability	Junction-to-lead thermal resistance optimized for 3/8″ lead length - enables accurate TJ estimation in thermal design
Parameter guarantee	Six electrical parameters fully tested and binned - reduces need for incoming inspection in high-volume manufacturing

Applications

Switch-Mode Power Supply Feedback	High-Voltage Reference Source
Use Scenario: Regulating output voltage in offline flyback or forward converters using optocoupler-coupled feedback. IC Role / Device Role / Timing Role: Zener reference for TL431-like shunt regulator or direct feedback to PWM controller error amplifier. Use Value: 150 V rating allows direct sensing of auxiliary winding voltages up to 130 V, eliminating resistive divider losses and improving efficiency.	Use Scenario: Providing stable reference voltage for analog front-ends in industrial data acquisition systems operating from 100–240 VAC inputs. IC Role / Device Role / Timing Role: Precision voltage clamp and reference generator for ADC biasing or comparator thresholds. Use Value: ±5% tolerance and <2.5 Ω Z_ZT ensure reference stability within ±0.5% over load and temperature, critical for 12-bit+ measurement accuracy.
Overvoltage Protection Clamp	DC Link Voltage Monitoring
Use Scenario: Protecting gate drivers and control ICs from bus overvoltage during motor drive fault conditions. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting DC link voltage spikes to safe levels before protection triggers. Use Value: 98 W surge rating absorbs 100 V × 1 A × 1 ms transients without degradation, extending system MTBF in harsh industrial environments.	Use Scenario: Monitoring 200–400 V DC link voltage in solar inverters or UPS systems using resistive divider + comparator. IC Role / Device Role / Timing Role: High-impedance voltage threshold detector enabling accurate undervoltage/overvoltage alarms. Use Value: 0.25 μA leakage at 114 V minimizes divider current error, preserving measurement accuracy while reducing power loss in always-on monitoring circuits.

Switch-Mode Power Supply Feedback

High-Voltage Reference Source

Use Scenario: Regulating output voltage in offline flyback or forward converters using optocoupler-coupled feedback.

IC Role / Device Role / Timing Role: Zener reference for TL431-like shunt regulator or direct feedback to PWM controller error amplifier.

Use Value: 150 V rating allows direct sensing of auxiliary winding voltages up to 130 V, eliminating resistive divider losses and improving efficiency.

Use Scenario: Providing stable reference voltage for analog front-ends in industrial data acquisition systems operating from 100–240 VAC inputs.

IC Role / Device Role / Timing Role: Precision voltage clamp and reference generator for ADC biasing or comparator thresholds.

Use Value: ±5% tolerance and <2.5 Ω Z_ZT ensure reference stability within ±0.5% over load and temperature, critical for 12-bit+ measurement accuracy.

Overvoltage Protection Clamp

DC Link Voltage Monitoring

Use Scenario: Protecting gate drivers and control ICs from bus overvoltage during motor drive fault conditions.

IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting DC link voltage spikes to safe levels before protection triggers.

Use Value: 98 W surge rating absorbs 100 V × 1 A × 1 ms transients without degradation, extending system MTBF in harsh industrial environments.

Use Scenario: Monitoring 200–400 V DC link voltage in solar inverters or UPS systems using resistive divider + comparator.

IC Role / Device Role / Timing Role: High-impedance voltage threshold detector enabling accurate undervoltage/overvoltage alarms.

Use Value: 0.25 μA leakage at 114 V minimizes divider current error, preserving measurement accuracy while reducing power loss in always-on monitoring circuits.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N5953B	Same electrical specs, but in bulk box (2000 units) vs. tape-and-reel (6000 units); identical DO-41 package and marking	No functional difference; preferred for manual assembly or low-volume prototyping where reel handling is unnecessary	Select 1N5953BRL for automated SMT-compatible pick-and-place; choose 1N5953B for hand-soldered evaluation or repair stock
MMSZ5265B-TP	Surface-mount SOD-123 package; 150 V ±5%, 500 mW rating; Z_ZT = 150 Ω @ 8.5 mA - significantly lower power and higher impedance	Not suitable for 3 W continuous operation; limited to low-current references or signal-level clamping	Use MMSZ5265B-TP only in space-constrained, low-power designs where thermal mass and surge immunity are secondary to footprint

Compared with 1N5953BRL, the 1N5953B offers identical performance in a different packaging format ideal for manual processes, while MMSZ5265B-TP trades power handling and surge robustness for miniaturization-making 1N5953BRL the sole choice for high-reliability, high-energy regulation tasks.

Availability

1N5953BRL is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial voltage monitors, overvoltage protection circuits, and high-voltage reference designs requiring stable component supply and long-term manufacturability.

Supply support for 1N5953BRL 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 management, analog, sensor, and logic solutions for automotive, industrial, cloud, and consumer markets.

The 1N5913B Series-including 1N5953BRL-is engineered for high-reliability voltage regulation in demanding power conversion and protection applications, emphasizing ruggedness, parameter consistency, and environmental resilience.

FAQ

What is the Zener voltage tolerance of the 1N5953BRL?

The 1N5953BRL has a Zener voltage tolerance of ±5%, meaning its actual breakdown voltage falls between 142.5 V and 157.5 V when measured at 30°C lead temperature with 600 mA test current. This tolerance is guaranteed per onsemi's production binning and applies to all units marked with the "B" suffix, ensuring consistent performance in high-voltage reference and clamp circuits.

Can the 1N5953BRL be used in surface-mount designs?

No-the 1N5953BRL uses a DO-41 axial-leaded package and is not compatible with surface-mount assembly. It requires through-hole mounting with leads bent and soldered into PCB pads. For SMT alternatives, consider the MMSZ5265B-TP (SOD-123), though it lacks the 3 W power rating and 98 W surge capability of the 1N5953BRL.

What is the maximum reverse leakage current for the 1N5953BRL?

The 1N5953BRL specifies a maximum reverse leakage current of 0.25 μA at 114 V reverse voltage (V_R) and 25°C ambient temperature. This ultra-low leakage ensures minimal loading on high-impedance reference dividers and preserves accuracy in precision analog monitoring circuits where current draw must be minimized.

How does the 1N5953BRL handle short-duration voltage surges?

The 1N5953BRL is rated for 98 W non-repetitive surge power at 1 ms pulse width, verified per onsemi's Figure 3. This allows it to safely clamp fast transients-such as inductive switching spikes or ESD-induced overvoltages-without parametric shift or failure, provided the duty cycle remains low and average power stays within the 3 W steady-state limit.

Is the 1N5953BRL RoHS compliant?

Yes-the "G" suffix in the full part number 1N5953BRL, G indicates a Pb-free, RoHS-compliant version. onsemi confirms this variant meets EU RoHS Directive 2011/65/EU requirements, with lead content below 1000 ppm and full compliance documentation available in their official packaging specification BRD8011/D.

1N5953BRL 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):: 150 V

Tolerance:: ±5%

Power - Max:: 3 W

Impedance (Max) (Zzt):: 600 Ohms

Current - Reverse Leakage @ Vr:: 1 µA @ 114 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

1N5953BRL FAQ

1.How can I place an order for 1N5953BRL through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5953BRL 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 1N5953BRL reliable?

The price and inventory of 1N5953BRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5953BRL is usually 5 days.

3.What payment methods are accepted for 1N5953BRL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5953BRL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5953BRL?

1N5953BRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5953BRL 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 1N5953BRL?

For technical support, including 1N5953BRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5953BRL requirements.

6.How does Aetrix verify that 1N5953BRL is sourced from the original manufacturer or authorized distributors?

All 1N5953BRL 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 1N5953BRL meets industry standards.

7.What is the process for return or replacement of 1N5953BRL?

All 1N5953BRL units undergo pre-shipment inspection (PSI). If there is an issue with 1N5953BRL, 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 1N5953BRL part is unused and in its original packaging.

Return procedure for 1N5953BRL:

1.Submit a request within 90 days.

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

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