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onsemi 1N5374BRLG
- Part No.:
- 1N5374BRLG
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- Axial
- Datasheet:
-
1N5374BRLG.pdf
- Description:
- DIODE ZENER 75V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:740
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Product details
Overview
1N5374BRLG 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 at 8.3 ms pulse width. It operates as a precision voltage reference or overvoltage clamp in DC power supply regulation circuits.
For engineers reviewing the 1N5374BRLG datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage stability under thermal drift, surge robustness for transient suppression, leakage current at rated reverse voltage, and lead-to-ambient thermal resistance in through-hole PCB layouts.
Technical Context
This device uses silicon-oxide passivated junction technology to achieve tight voltage regulation and low leakage. Its zener voltage is specified at IZT = 1 mA with guaranteed min/typ/max values (71.25 V / 75 V / 78.75 V) and exhibits a positive temperature coefficient above 5 V, typical for high-voltage Zeners.
The 1N5374BRLG supports non-repetitive surge currents up to 1.6 A at 8.3 ms, with thermal performance governed by junction-to-lead resistance (θJL = 25 °C/W) and lead length-dependent derating. It is rated for operation from −65 °C to +200 °C, with DC max junction temperature limited to 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 75 V nominal, ±5% tolerance - defines stable regulation point for feedback or clamping |
| Power Dissipation (PD) | 5 W at TL = 25 °C - sets maximum continuous DC power handling before thermal derating |
| Zener Impedance (ZZT) | 20 Ω max @ IZT = 1 mA - determines AC regulation stiffness and ripple rejection |
| Surge Current (IRM) | 1.6 A peak @ 8.3 ms - enables transient overvoltage absorption without failure |
| Leakage Current (IR) | 1.9 µA max @ VR = 56 V - ensures minimal standby power loss in high-impedance bias networks |
| Junction-to-Lead Thermal Resistance (θJL) | 25 °C/W - quantifies heat transfer efficiency from die to leads for thermal design |
| Operating Temperature Range | −65 °C to +200 °C - supports industrial, automotive under-hood, and aerospace environments |
Pinout & Package
Package: Axial-lead, transfer-molded plastic (Case 017AA), Pb-free, cathode indicated by band. Dimensions: Length K = 1.000–1.250 in (25.4–31.75 mm), body diameter B = 0.130–0.145 in (3.30–3.68 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in reverse-biased regulation; forms reference ground return path |
| Cathode | Zener breakdown terminal / Regulation output node | Connected to regulated voltage rail; polarity band identifies this terminal for correct orientation |
Key Features
| Feature | Design Value |
|---|---|
| ESD robustness | Class 3 (>16 kV HBM) - withstands handling and board-level ESD events without parameter shift |
| Tight voltage tolerance | ±5% across full operating range - reduces need for post-assembly trimming in precision supplies |
| Surge rating | Up to 180 W @ 8.3 ms - absorbs line transients per IEC 61000-4-5 Level 3 without degradation |
| Corrosion-resistant finish | Leads readily solderable after storage - ensures long-term manufacturability and reliability |
| Pb-free compliance | RoHS-compliant package (G suffix) - meets global environmental regulations without performance trade-off |
Applications
| Industrial Power Supply Regulation | Automotive ECU Voltage Reference |
|---|---|
Use Scenario: Stabilizing 75 V auxiliary rail in programmable logic controller (PLC) backplane power modules. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator and overvoltage clamp for op-amp reference inputs. Use Value: Maintains ±0.5% output stability over −40 °C to +85 °C ambient using its 75 V nominal VZ and low tempco. | Use Scenario: Providing isolated 75 V bias for CAN transceiver protection circuitry in engine control units. IC Role / Device Role / Timing Role: Standby-mode voltage clamp protecting downstream ICs during load-dump transients. Use Value: Absorbs 1.6 A surge pulses (8.3 ms) without failure, meeting ISO 7637-2 Pulse 5a requirements. |
| Test Equipment Calibration Reference | High-Voltage LED Driver Feedback |
Use Scenario: Serving as traceable 75 V calibration standard in portable multimeter internal reference dividers. IC Role / Device Role / Timing Role: Precision voltage reference element in resistive divider networks for ADC input scaling. Use Value: Delivers <1.9 µA leakage at 56 V reverse bias, minimizing divider error and enabling 16-bit measurement accuracy. | Use Scenario: Regulating feedback node in constant-current LED driver for UV-C sterilization arrays (72–78 V string). IC Role / Device Role / Timing Role: Shunt regulator defining upper voltage limit to prevent LED overvoltage stress. Use Value: 20 Ω ZZT ensures <0.2 V regulation deviation across 0.5–1.5 mA dynamic load shifts, preserving luminous flux stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5374BRL | Same electrical specs but SnPb lead finish (non-Pb-free) | Not suitable for RoHS-compliant production; requires exemption documentation | Select only if legacy assembly process mandates SnPb solder compatibility |
| BZX85C75 | 1.3 W rating, 75 V ±5%, higher ZZT (70 Ω), lower IRM (0.5 A) | Limited to low-power signal-level clamping; insufficient for 5 W power rail regulation | Use only in space-constrained, low-energy circuits where 5 W dissipation is not required |
Compared with 1N5374BRLG, 1N5374BRL lacks Pb-free compliance and requires special handling, while BZX85C75 offers identical nominal voltage but cannot sustain equivalent power or surge loads-making 1N5374BRLG the sole choice for robust 5 W, high-surge, RoHS-aligned Zener regulation.
Availability
1N5374BRLG is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive ECU voltage reference, and test equipment calibration requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for 1N5374BRLG 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 semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The 1N53 Series is part of onsemi's Surmetic™ 40 Zener family, engineered for high-reliability voltage regulation in harsh environments where thermal stability, surge immunity, and long-term parametric consistency are critical.
FAQ
What is the exact zener voltage tolerance and test condition for 1N5374BRLG?
The 1N5374BRLG has a ±5% zener voltage tolerance, verified at IZT = 1 mA with 40 ±10 ms current application prior to measurement. Its nominal VZ is 75 V, with guaranteed min/typ/max values of 71.25 V / 75 V / 78.75 V at TA = 25 °C. This tolerance applies specifically to the B-suffix device per JEDEC standards.
Does 1N5374BRLG support surface-mount assembly?
No, the 1N5374BRLG is an axial-lead device in Case 017AA plastic package and is designed exclusively for through-hole mounting. It does not have SMD-compatible terminations or tape-and-reel packaging optimized for pick-and-place. For SMT alternatives, consult onsemi's NZ series or BZX85C75 in DO-35.
What is the maximum allowable DC zener current for 1N5374BRLG at 25°C ambient?
The maximum DC zener current (IZM) for 1N5374BRLG is 620 mA at TL = 25 °C, calculated as PD/VZ(min) = 5 W / 71.25 V. This value assumes lead temperature is maintained at 25 °C; actual usable current decreases with rising lead temperature due to 40 mW/°C derating above 25 °C.
How does the temperature coefficient affect 1N5374BRLG's regulation accuracy above 70 V?
Per Figure 3 in the datasheet, the 1N5374BRLG exhibits a positive temperature coefficient of approximately +0.08 %/°C above 70 V. This means its zener voltage increases by ~60 mV per °C rise in junction temperature, requiring thermal design to limit ΔTJ if regulation stability within ±1% is required across −40 °C to +125 °C.
Is 1N5374BRLG suitable for use in load-dump protection circuits per ISO 7637-2?
Yes, the 1N5374BRLG is validated for load-dump suppression: its 1.6 A peak surge current rating at 8.3 ms matches ISO 7637-2 Pulse 5a waveform requirements. When used with appropriate series impedance, it clamps transients to ≤78.75 V, protecting downstream 80 V-rated components in automotive ECUs.
1N5374BRLG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
1N5374BRLG FAQ
1.How can I place an order for 1N5374BRLG through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5374BRLG 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 1N5374BRLG reliable?
The price and inventory of 1N5374BRLG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5374BRLG is usually 5 days.
3.What payment methods are accepted for 1N5374BRLG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5374BRLG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5374BRLG?
1N5374BRLG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5374BRLG 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 1N5374BRLG?
For technical support, including 1N5374BRLG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5374BRLG requirements.
6.How does Aetrix verify that 1N5374BRLG is sourced from the original manufacturer or authorized distributors?
All 1N5374BRLG 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 1N5374BRLG meets industry standards.
7.What is the process for return or replacement of 1N5374BRLG?
All 1N5374BRLG units undergo pre-shipment inspection (PSI). If there is an issue with 1N5374BRLG, 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 1N5374BRLG part is unused and in its original packaging.
Return procedure for 1N5374BRLG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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