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onsemi 1N5374BRL
- Part No.:
- 1N5374BRL
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5374BRL.pdf
- Description:
- DIODE ZENER 75V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:5,714
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Product details
Overview
1N5374BRL from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 75 V, ±5% tolerance, 20 Ω maximum zener impedance at 1 mA test current, and 1.6 A maximum surge current (8.3 ms). It operates across −65 °C to +200 °C and is used for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation in industrial power converters.
For engineers reviewing the 1N5374BRL datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal behavior, mechanical package details, and real-world design context for reliable selection in high-stability DC regulation and transient suppression roles.
Technical Context
The 1N5374BRL employs a silicon-oxide passivated junction enabling tight voltage tolerance (±5%), low leakage (<0.5 mA at 56 V), and robust ESD immunity (>16 kV HBM). Its thermal resistance from junction-to-lead is 25 °C/W at 3/8″ lead length, supporting stable operation under pulsed loads up to 180 W.
Designed for DC and low-duty-cycle pulsed regulation, it maintains specified zener voltage across 10–50% of IZM (620 mA), with temperature coefficient of +0.11 mV/°C typical for 75 V units - confirming positive TC behavior consistent with higher-voltage Zeners in the 1N53 series.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 71.25 V (min) to 78.75 V (max) at IZT = 1 mA - defines regulation window for stable 75 V reference under load variation |
| Power Dissipation (PD) | 5 W at TL = 25 °C - sets absolute DC power limit before thermal derating begins |
| Zener Impedance (ZZT) | 20 Ω max at IZT = 1 mA - ensures minimal output voltage shift under small-signal current changes |
| Surge Current (IR) | 1.6 A peak (8.3 ms square wave) - enables transient overvoltage clamping without failure |
| Leakage Current (IR) | 0.5 mA max at VR = 56 V - guarantees low standby power loss in high-impedance bias networks |
| Junction Temperature Range | −65 °C to +200 °C - supports operation in automotive under-hood, industrial motor drive, and aerospace environments |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - eliminates need for external ESD protection in board-level handling |
Pinout & Package
1N5374BRL uses an axial-lead, transfer-molded plastic package (Case 017AA, SURMETIC 40), with cathode indicated by a band. Leads are corrosion-resistant and solderable at 260 °C for 10 seconds at 1/16″ from case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of regulated circuit; reverse-biased during regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Provides stable 75 V reference when reverse-biased; polarity band marks this terminal |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Guarantees tight regulation without post-manufacture trimming in cost-sensitive power supplies |
| 180 W surge rating (8.3 ms) | Enables single-device transient suppression in DC bus lines without external crowbar circuitry |
| Silicon-oxide passivated junction | Delivers long-term stability and low parameter drift in humid or thermally cycling environments |
| Pb-free axial-lead package | Meets RoHS compliance requirements without sacrificing thermal performance or solderability |
| 25 °C/W junction-to-lead thermal resistance | Allows direct heat sinking via leads - simplifies thermal design in space-constrained PCB layouts |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Regulating auxiliary 75 V rail in isolated flyback converter for PLC I/O modules. IC Role / Device Role / Timing Role: Zener diode provides precise voltage reference for TL431-based feedback loop and clamps output during no-load transients. Use Value: Maintains ±1.5% output accuracy across −40 °C to +85 °C ambient due to stable 75 V VZ and low TC. |
Use Scenario: Protecting gate driver IC inputs from 100 V surge events on 48 V DC bus in motor control inverter. IC Role / Device Role / Timing Role: Acts as shunt clamp to divert >1.6 A surge current away from sensitive logic inputs during ESD or inductive kickback. Use Value: Absorbs 180 W for 8.3 ms without degradation, eliminating need for TVS diode plus series resistor. |
| Programmable Reference Source | High-Voltage Bias Network Stabilizer |
Use Scenario: Generating stable 75 V bias for op-amp high-side current sensing in solar microinverter DC link. IC Role / Device Role / Timing Role: Provides low-noise, low-drift reference for precision amplifier gain-setting resistors. Use Value: 20 Ω ZZT ensures <10 mV error under 0.5 mA load variation - critical for sub-1% current measurement accuracy. |
Use Scenario: Stabilizing 75 V bias for SiC MOSFET gate driver bootstrap capacitor charging in 650 V power stage. IC Role / Device Role / Timing Role: Clamps bootstrap supply to exact 75 V, preventing driver overvoltage while maintaining fast turn-on capability. Use Value: 0.5 mA leakage at 56 V minimizes quiescent current drain, extending hold-up time during AC dropout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5374B | Same electrical specs but in 1000-unit box packaging (not tape-and-reel); identical axial-lead Case 017AA | No difference in circuit function or layout - only differs in logistics format | Select 1N5374B for manual prototyping or low-volume assembly where reel handling is unnecessary |
| BZX85C75 | 1.3 W rating, 71–79 V range, 30 Ω ZZT, TO-204AA (DO-41) package - lower power, higher impedance, same pinout | Not suitable for 5 W continuous dissipation; limited to low-power references or signal-level clamping | Choose BZX85C75 only if thermal budget restricts to ≤1.3 W and surge demands are <0.5 A |
Compared with 1N5374BRL, the 1N5374B offers identical performance in non-reel form, while BZX85C75 trades power handling and impedance for smaller footprint - making 1N5374BRL the sole choice for 5 W, low-Z, high-surge industrial regulation.
Availability
1N5374BRL is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and high-voltage reference designs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1N5374BRL 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, sensor, and connectivity solutions 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 thermal robustness, surge resilience, and parametric consistency.
FAQ
What is the zener voltage tolerance for 1N5374BRL?
The 1N5374BRL has a ±5% zener voltage tolerance, meaning its rated 75 V nominal value falls between 71.25 V and 78.75 V at 1 mA test current (IZT). This tolerance is guaranteed per JEDEC standard and applies to all B-suffix devices in the 1N53 series, ensuring predictable regulation without binning or calibration.
Can 1N5374BRL be used in surface-mount designs?
No - the 1N5374BRL is strictly an axial-lead device in Case 017AA (SURMETIC 40) plastic package and cannot be mounted on SMT pads. It requires through-hole placement and lead forming. For SMT-compatible alternatives, consider the MMBZ5274B (SOT-23, 0.5 W) or BZX84-C75 (SOT-23), though neither matches the 5 W rating or surge capability of the 1N5374BRL.
What is the maximum continuous zener current for 1N5374BRL?
The maximum DC zener current (IZM) for 1N5374BRL is 620 mA, calculated as 5 W / 75 V (nominal). This value is specified at TL = 25 °C with 3/8″ lead length; actual usable current decreases with rising lead temperature due to 40 mW/°C derating above 25 °C.
Does 1N5374BRL have a specified temperature coefficient?
Yes - the 1N5374BRL exhibits a positive temperature coefficient of approximately +0.11 mV/°C, consistent with other 1N53-series Zeners rated above 10 V. This value is derived from Figure 3 in the official datasheet and confirms that VZ increases slightly with junction temperature, aiding stability in series-connected reference strings.
Is 1N5374BRL RoHS compliant?
Yes - the "G" suffix in 1N5374BRL indicates a Pb-free package per onsemi's RoHS compliance program. The device meets EU Directive 2011/65/EU and is compatible with lead-free reflow and wave soldering processes, including peak temperatures up to 260 °C for 10 seconds at 1/16″ from the case.
1N5374BRL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 75 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 45 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 56 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
1N5374BRL FAQ
1.How can I place an order for 1N5374BRL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5374BRL 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 1N5374BRL reliable?
The price and inventory of 1N5374BRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5374BRL is usually 5 days.
3.What payment methods are accepted for 1N5374BRL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5374BRL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5374BRL?
1N5374BRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5374BRL 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 1N5374BRL?
For technical support, including 1N5374BRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5374BRL requirements.
6.How does Aetrix verify that 1N5374BRL is sourced from the original manufacturer or authorized distributors?
All 1N5374BRL 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 1N5374BRL meets industry standards.
7.What is the process for return or replacement of 1N5374BRL?
All 1N5374BRL units undergo pre-shipment inspection (PSI). If there is an issue with 1N5374BRL, 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 1N5374BRL part is unused and in its original packaging.
Return procedure for 1N5374BRL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5374BRL Tags
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
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