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

onsemi 1N5371BRL

Name: 1N5371BRL
Brand: onsemi
SKU: 1N5371BRL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5371BRL

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: T-18, Axial

Datasheet:: 1N5371BRL.pdf

Description:: DIODE ZENER 60V 5W AXIAL

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Product details

Overview

1N5371BRL from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 60 V, ±5% tolerance, 20 Ω maximum zener impedance at 40 mA test current, and 1.2 V maximum forward voltage at 1.0 A. It provides precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation for industrial power converters and telecom DC-DC modules.

For engineers reviewing the 1N5371BRL datasheet, pinout, applications, or equivalent options, key selection criteria include its 60 V nominal zener voltage, 350 mA maximum DC zener current, 79 µA reverse leakage at 45.5 V, 2.2 V/°C temperature coefficient, and Pb-free Surmetic 40 plastic package with cathode band polarity marking.

Technical Context

This device operates as a silicon-oxide passivated junction Zener regulator, delivering stable reverse breakdown behavior under steady-state and transient conditions. Its thermal design relies on junction-to-lead resistance (25 °C/W) and lead-length-dependent derating, with surge capability up to 180 W for 8.3 ms pulses.

The 1N5371BRL exhibits a positive temperature coefficient of +2.2 mV/°C above 10 V, enabling predictable drift compensation in temperature-sensitive references. It meets Class 3 ESD rating (>16 kV HBM) and supports mounting in any orientation with corrosion-resistant, solderable leads rated to 260 °C for 10 seconds.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	57 V min / 60 V nom / 63 V max - defines regulated output voltage range under 40 mA test current
Power Dissipation (P_D)	5 W at T_L = 25°C - sets maximum continuous power handling before thermal derating applies
Zener Impedance (Z_ZT)	20 Ω max @ I_ZT = 40 mA - determines regulation stiffness and output voltage variation under load changes
Reverse Leakage (I_R)	79 µA max @ V_R = 45.5 V - specifies minimum off-state current in clamping or reference applications
Surge Current (I_RM)	350 A peak @ 8.3 ms - enables transient overvoltage suppression without failure
Temperature Coefficient	+2.2 mV/°C - quantifies voltage drift per degree Celsius above 10 V, critical for precision references
Forward Voltage (V_F)	1.2 V max @ I_F = 1.0 A - defines conduction loss when used in series or bidirectional clamp configurations

Pinout & Package

Package: Axial-lead Surmetic 40 plastic case (JEDEC Case 017AA), void-free transfer-molded thermosetting material, cathode indicated by color band, lead diameter 0.037–0.043 in (0.94–1.09 mm), overall length 1.000–1.250 in (25.4–31.75 mm).

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / low-side connection in reverse-biased regulation	Connected to ground or lower potential node when used as shunt regulator
Cathode	Zener breakdown terminal / high-side connection in reverse-biased regulation	Connected to input rail or voltage source; polarity band identifies this terminal

Key Features

Feature	Design Value
±5% Zener voltage tolerance	Ensures tight regulation window (57–63 V) without external trimming in production designs
25 °C/W junction-to-lead thermal resistance	Enables direct heat sinking through leads; supports 5 W operation with minimal PCB copper area
Class 3 ESD rating (>16 kV HBM)	Eliminates need for external ESD protection in board-level handling and system integration
180 W non-repetitive surge rating	Withstands lightning-induced transients and inductive switching spikes in industrial power rails
Pb-free Surmetic 40 package	Complies with RoHS and JEDEC J-STD-020 reflow profiles without lead contamination risk

Applications

Industrial Power Supply Feedback	Telecom DC-DC Reference
Use Scenario: Regulating output voltage in isolated flyback or forward converter feedback networks using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 60 V threshold to control PWM duty cycle via secondary-side error signal. Use Value: Maintains ±1% output regulation across line/load/temperature with no external trim components due to tight 60 V ±5% tolerance and low 20 Ω dynamic impedance.	Use Scenario: Generating stable bias voltage for current-sense amplifiers and supervisor ICs in 48 V telecom rectifier modules. IC Role / Device Role / Timing Role: Precision voltage reference supplying clean 60 V rail to analog front-end circuitry requiring low-noise, low-drift sources. Use Value: Delivers 79 µA max leakage at 45.5 V and +2.2 mV/°C TC, minimizing reference error contribution in wide-temperature (-40°C to +125°C) environments.
Overvoltage Protection Clamp	Programmable Threshold Detector
Use Scenario: Clamping transient overvoltages on 48 V battery backup lines in data center PSUs during hot-swap events. IC Role / Device Role / Timing Role: Fast-acting shunt protector diverting surge energy away from downstream MOSFETs and controllers when voltage exceeds 63 V. Use Value: Sustains 350 A peak surge current for 8.3 ms without degradation, validated per Figure 5 in onsemi datasheet for 60 V nominal units.	Use Scenario: Setting trip point for undervoltage lockout (UVLO) or overvoltage shutdown in programmable power sequencers. IC Role / Device Role / Timing Role: Fixed-voltage comparator input reference enabling accurate 60 V threshold detection with hysteresis added externally. Use Value: Provides repeatable 60 V trigger point with <1% hysteresis impact due to low 20 Ω Z_ZT, reducing false triggering in noisy industrial environments.

Industrial Power Supply Feedback

Telecom DC-DC Reference

Use Scenario: Regulating output voltage in isolated flyback or forward converter feedback networks using optocoupler-coupled error amplifiers.

IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 60 V threshold to control PWM duty cycle via secondary-side error signal.

Use Value: Maintains ±1% output regulation across line/load/temperature with no external trim components due to tight 60 V ±5% tolerance and low 20 Ω dynamic impedance.

Use Scenario: Generating stable bias voltage for current-sense amplifiers and supervisor ICs in 48 V telecom rectifier modules.

IC Role / Device Role / Timing Role: Precision voltage reference supplying clean 60 V rail to analog front-end circuitry requiring low-noise, low-drift sources.

Use Value: Delivers 79 µA max leakage at 45.5 V and +2.2 mV/°C TC, minimizing reference error contribution in wide-temperature (-40°C to +125°C) environments.

Overvoltage Protection Clamp

Programmable Threshold Detector

Use Scenario: Clamping transient overvoltages on 48 V battery backup lines in data center PSUs during hot-swap events.

IC Role / Device Role / Timing Role: Fast-acting shunt protector diverting surge energy away from downstream MOSFETs and controllers when voltage exceeds 63 V.

Use Value: Sustains 350 A peak surge current for 8.3 ms without degradation, validated per Figure 5 in onsemi datasheet for 60 V nominal units.

Use Scenario: Setting trip point for undervoltage lockout (UVLO) or overvoltage shutdown in programmable power sequencers.

IC Role / Device Role / Timing Role: Fixed-voltage comparator input reference enabling accurate 60 V threshold detection with hysteresis added externally.

Use Value: Provides repeatable 60 V trigger point with <1% hysteresis impact due to low 20 Ω Z_ZT, reducing false triggering in noisy industrial 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
1N5371B	Same electrical specs but in 1000-unit box packaging (not tape-and-reel); identical Surmetic 40 case and marking	No functional difference; differs only in logistics format for manual vs. automated assembly	Select 1N5371BRL for SMT pick-and-place; choose 1N5371B for hand-soldered prototypes or low-volume builds
BZX85C62-TR	62 V nominal, ±5%, 1.3 W power rating, DO-41 package, 100 Ω Z_ZT @ 5 mA - lower power, higher impedance, different thermal profile	Suitable for low-current references (<50 mA), not for 350 mA DC or 180 W surge applications	Use BZX85C62-TR only where power dissipation stays below 1.3 W and surge immunity is not required

Compared with 1N5371BRL, the 1N5371B offers identical performance in a different packaging format ideal for manual assembly, while BZX85C62-TR provides a lower-cost, lower-power alternative for non-demanding reference roles-but cannot replace 1N5371BRL in 5 W regulation or high-surge environments.

Availability

1N5371BRL is available at Aetrix Electronics and suitable for industrial power supplies, telecom DC-DC converters, and overvoltage protection circuits requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for 1N5371BRL 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, sensors, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The 1N53 Series belongs to onsemi's legacy Zener regulator portfolio designed for high-reliability, high-power shunt regulation in harsh-environment power systems-emphasizing robust surge handling, tight voltage tolerance, and Pb-free manufacturability.

FAQ

What is the nominal zener voltage and tolerance of the 1N5371BRL?

The 1N5371BRL has a nominal zener voltage of 60 V with a ±5% tolerance, meaning its actual breakdown voltage falls between 57 V and 63 V when tested at 40 mA (I_ZT). This tight tolerance is guaranteed per onsemi's datasheet revision 19 and applies specifically to the B-suffix variant, ensuring consistent regulation performance across production lots without calibration.

How does the 1N5371BRL handle thermal dissipation in continuous operation?

The 1N5371BRL dissipates up to 5 W at 25°C lead temperature (T_L), with thermal derating starting above that point at 40 mW/°C. Its junction-to-lead thermal resistance is 25 °C/W, so at 350 mA DC current and 60 V drop, it reaches ~8.75 W theoretical dissipation-requiring heatsinking or forced-air cooling beyond ambient-rated conditions. The axial leads serve as primary thermal paths, and mounting position is unrestricted.

Can the 1N5371BRL be used in surge protection applications, and what is its peak surge rating?

Yes, the 1N5371BRL is rated for 180 W non-repetitive surge power at 8.3 ms pulse width, corresponding to a peak surge current of 350 A. This capability is validated in Figure 5 of the onsemi datasheet and makes it suitable for clamping inductive kickback, lightning surges, and hot-swap transients in 48 V and 60 V systems-provided the surge event is infrequent and non-repetitive.

What is the forward voltage specification for the 1N5371BRL, and how does it affect circuit design?

The 1N5371BRL has a maximum forward voltage (V_F) of 1.2 V at 1.0 A forward current. This value matters when the device is used in bidirectional clamps or series configurations-for example, in back-to-back arrangements for AC line protection. At 1 A, the 1.2 V drop implies 1.2 W conduction loss, requiring attention to forward power dissipation and thermal layout if sustained.

Is the 1N5371BRL RoHS compliant and compatible with standard reflow processes?

Yes, the 1N5371BRL carries the "G" suffix indicating Pb-free construction and complies with RoHS Directive 2011/65/EU. Its Surmetic 40 plastic package is qualified for standard SnPb and lead-free reflow profiles, with maximum lead temperature rated at 260°C for 10 seconds at 1/16 inch from the case-aligning with IPC-J-STD-020 moisture sensitivity level (MSL) requirements for surface-mount assembly.

1N5371BRL Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: T-18, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 60 V

Tolerance:: ±5%

Power - Max:: 5 W

Impedance (Max) (Zzt):: 40 Ohms

Current - Reverse Leakage @ Vr:: 500 nA @ 45.5 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

1N5371BRL FAQ

1.How can I place an order for 1N5371BRL through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5371BRL 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 1N5371BRL reliable?

The price and inventory of 1N5371BRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5371BRL is usually 5 days.

3.What payment methods are accepted for 1N5371BRL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5371BRL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5371BRL?

1N5371BRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5371BRL 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 1N5371BRL?

For technical support, including 1N5371BRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5371BRL requirements.

6.How does Aetrix verify that 1N5371BRL is sourced from the original manufacturer or authorized distributors?

All 1N5371BRL 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 1N5371BRL meets industry standards.

7.What is the process for return or replacement of 1N5371BRL?

All 1N5371BRL units undergo pre-shipment inspection (PSI). If there is an issue with 1N5371BRL, 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 1N5371BRL part is unused and in its original packaging.

Return procedure for 1N5371BRL:

1.Submit a request within 90 days.

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

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