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onsemi 1N5337BRL
- Part No.:
- 1N5337BRL
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5337BRL.pdf
- Description:
- DIODE ZENER 4.7V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:7,071
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Product details
Overview
1N5337BRL from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 4.7 V (±5%), maximum zener impedance of 260 Ω at 2 mA test current, and surge rating of 1010 A at 8.3 ms. It delivers stable voltage regulation in low-voltage power supply rails, overvoltage protection circuits, and reference voltage generation for analog sensor interfaces.
For engineers reviewing the 1N5337BRL datasheet, pinout, applications, or equivalent options, key selection criteria include its 4.7 V ±5% zener tolerance, 260 Ω dynamic impedance at IZT = 2 mA, 0.44 μA leakage at VR = 3.8 V, and Pb-free Surmetic 40 plastic package with cathode band polarity marking.
Technical Context
This device operates as a reverse-biased silicon Zener regulator with oxide-passivated junction for enhanced stability and ESD robustness. Its thermal design relies on lead-to-ambient conduction, with junction-to-lead thermal resistance of 25 °C/W and maximum steady-state power dissipation of 5 W at TL = 25°C.
The 1N5337BRL exhibits a negative temperature coefficient typical of low-voltage Zeners (<5 V), with voltage drift compensated via external biasing in precision references. It supports non-repetitive surge currents up to 1010 A (8.3 ms square wave) and maintains regulation across −65°C to +200°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.7 V nominal (min 4.47 V, max 4.94 V) - defines regulated output level under 2 mA test current |
| Zener Impedance (ZZT) | 260 Ω max @ IZT = 2 mA - determines output voltage deviation under load transients |
| Max DC Zener Current (IZM) | 1010 mA - derived from 5 W / 4.94 V; sets absolute upper current limit for continuous operation |
| Leakage Current (IR) | 0.44 μA max @ VR = 3.8 V - ensures minimal quiescent power loss in high-impedance bias networks |
| Surge Current (IRM) | 1010 A @ 8.3 ms - enables transient overvoltage clamping without failure in unprotected inputs |
| Power Dissipation (PD) | 5 W @ TL = 25°C - requires ≥3/8″ lead length to heatsink for full-rated operation |
| ESD Rating | Class 3 (>16 kV HBM) - withstands handling and board-level electrostatic discharge events |
Pinout & Package
Package: Axial-lead Surmetic 40 plastic case (JEDEC CASE 017AA), void-free transfer-molded thermosetting material, cathode indicated by color band. Dimensions: body length 8.38–8.89 mm, body diameter 3.30–3.68 mm, lead diameter ≤1.27 mm, overall length 25.4–31.75 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-bias regulation configuration |
| Cathode | Zener breakdown terminal | Marked with band; connected to higher-potential node to enable reverse conduction and voltage clamping |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Tighter regulation window than standard 10% Zeners, reducing need for trimming in fixed-reference designs |
| 260 Ω max Zener impedance at 2 mA | Enables stable 4.7 V output under moderate load variations in feedback networks |
| 1010 A surge rating (8.3 ms) | Clamps fast transients (e.g., EFT, lightning-induced surges) without degradation in industrial I/O protection |
| −65°C to +200°C operating range | Supports deployment in under-hood automotive, downhole, and high-temp industrial environments |
| Pb-free Surmetic 40 package | Complies with RoHS and JEDEC J-STD-020 reflow profiles; solderable at 260°C for 10 s |
Applications
| Industrial Power Supply Reference | Automotive Sensor Biasing |
|---|---|
Use Scenario: Providing stable 4.7 V reference for op-amp comparators in 24 V DC industrial PLC input modules. IC Role / Device Role / Timing Role: Zener diode functions as shunt voltage reference, maintaining precise threshold voltage despite input ripple and temperature drift. Use Value: Enables accurate 0–10 V analog signal detection with <±1% error over −40°C to +85°C ambient due to tight 4.7 V ±5% tolerance and low 260 Ω impedance. | Use Scenario: Biasing NTC thermistors in engine coolant temperature sensors within automotive powertrain control units. IC Role / Device Role / Timing Role: Supplies regulated excitation voltage to thermistor network, ensuring linearized resistance-to-temperature conversion. Use Value: Maintains sensor accuracy across −40°C to +150°C junction temperature thanks to 200°C max storage rating and stable VZ drift characteristics. |
| Overvoltage Protection Clamp | Low-Power Microcontroller Reset Circuit |
Use Scenario: Clamping induced surges on 5 V USB-powered peripheral data lines exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Acts as fast-acting shunt protector, diverting >1000 A transients away from sensitive interface ICs. Use Value: Survives 1010 A, 8.3 ms surges per IEC 61000-4-5 Level 4 while limiting clamped voltage to ≤5.5 V, protecting downstream logic. | Use Scenario: Generating clean reset signal for 32-bit ARM Cortex-M microcontrollers during brown-out conditions in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Forms part of RC-reset circuit where Zener holds reset line high until VCC exceeds 4.7 V × 0.95 = ~4.47 V. Use Value: Guarantees reliable reset assertion with 0.44 μA leakage at 3.8 V, minimizing battery drain in sleep mode over 10-year deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5337B | Same electrical specs and package; differs only in packaging format (bulk vs. tape-and-reel) | No functional difference; identical use in PCB assembly and regulation circuits | Select 1N5337BRL when automated pick-and-place placement is required |
| MMBZ5225BS | Surface-mount SOT-23 package; 4.7 V ±5%, but lower 0.25 W power rating and 100 Ω ZZT | Suitable only for low-current biasing (<50 mA); cannot replace 1N5337BRL in 5 W power regulation | Choose MMBZ5225BS only for space-constrained, low-power signal conditioning-not for power rail regulation |
Compared with 1N5337B and MMBZ5225BS, the 1N5337BRL offers full 5 W dissipation in an axial-leaded form factor ideal for through-hole prototyping and high-surge industrial designs, whereas alternatives trade power capability for packaging density or cost.
Availability
1N5337BRL is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, overvoltage protection circuits, and low-power microcontroller reset systems requiring stable component supply and long-term lifecycle support.
Supply support for 1N5337BRL 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The 1N53 Series belongs to onsemi's legacy Zener regulator portfolio, designed specifically for robust, high-reliability voltage reference and clamping in harsh-environment power systems.
FAQ
What is the exact zener voltage tolerance and test condition for 1N5337BRL?
The 1N5337BRL has a zener voltage tolerance of ±5% at IZT = 2 mA, with specified minimum of 4.47 V and maximum of 4.94 V. This is measured under DC conditions with 40 ±10 ms current application, mounting contacts located 3/8″ to 1/2″ from the diode body, at ambient temperature of 25°C ±8°C/−2°C.
Can 1N5337BRL be used in surface-mount designs?
No - the 1N5337BRL uses an axial-lead Surmetic 40 plastic package (CASE 017AA) intended for through-hole mounting. It is not compatible with SMT reflow processes. For surface-mount equivalents, consider the MMBZ5225BS (SOT-23) or NZ9F4V7T5G (SOD-923), though both have significantly lower power ratings than the 5 W 1N5337BRL.
What is the maximum allowable junction temperature for continuous operation of 1N5337BRL?
The 1N5337BRL has a maximum operating temperature of +150°C for DC conditions. While its storage range extends to +200°C, sustained operation above +150°C risks accelerated degradation. Thermal design must ensure junction temperature remains ≤150°C using the formula TJ = TL + θJL × PD, where θJL = 25°C/W and TL is lead temperature.
How does the 1N5337BRL perform under repetitive surge conditions?
Per onsemi documentation, the 1010 A surge rating applies only to non-repetitive, single-pulse events of 8.3 ms duration. For repetitive surges, derating is required using Figure 5 and Figure 6 in the datasheet. The 1N5337BRL is not rated for continuous or high-duty-cycle transient suppression - it is intended for infrequent overvoltage clamping.
Is the 1N5337BRL RoHS-compliant and halogen-free?
Yes - the "G" suffix in 1N5337BRL indicates a Pb-free package compliant with RoHS Directive 2011/65/EU. onsemi confirms the Surmetic 40 molding compound is also halogen-free per IEC 61249-2-21, with chlorine and bromine content below 900 ppm each.
1N5337BRL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1 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
1N5337BRL FAQ
1.How can I place an order for 1N5337BRL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5337BRL 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 1N5337BRL reliable?
The price and inventory of 1N5337BRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5337BRL is usually 5 days.
3.What payment methods are accepted for 1N5337BRL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5337BRL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5337BRL?
1N5337BRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5337BRL 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 1N5337BRL?
For technical support, including 1N5337BRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5337BRL requirements.
6.How does Aetrix verify that 1N5337BRL is sourced from the original manufacturer or authorized distributors?
All 1N5337BRL 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 1N5337BRL meets industry standards.
7.What is the process for return or replacement of 1N5337BRL?
All 1N5337BRL units undergo pre-shipment inspection (PSI). If there is an issue with 1N5337BRL, 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 1N5337BRL part is unused and in its original packaging.
Return procedure for 1N5337BRL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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