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onsemi 1N5337BRLG
- Part No.:
- 1N5337BRLG
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5337BRLG.pdf
- Description:
- DIODE ZENER 4.7V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,232
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Product details
Overview
1N5337BRLG 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 features silicon-oxide passivated junction for stable regulation in DC power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N5337BRLG datasheet, pinout, applications, or equivalent options, key selection factors include its 4.7 V regulation tolerance, 260 Ω dynamic impedance at IZT = 2 mA, 0.44 μA leakage at VR = 15.3 V, and Pb-free Surmetic 40 plastic package with cathode band polarity marking.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in a silicon p-n junction. Its zener voltage is specified at IZT = 2 mA with ±5% tolerance, and it maintains regulation across junction temperatures from −65°C to +200°C (DC operation up to +150°C).
Thermal performance is defined by junction-to-lead resistance of 25°C/W at TL = 25°C with 3/8″ lead length, and transient thermal response supports non-repetitive 8.3 ms surges up to 1010 A without failure under specified mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.7 V nominal (4.47–4.94 V range), enabling precise 4.7 V rail clamping or reference generation |
| Power Dissipation (PD) | 5 W at TL = 25°C, derated 40 mW/°C above 25°C - defines max continuous DC load capability |
| Zener Impedance (ZZT) | 260 Ω max at IZT = 2 mA - determines output voltage stability under varying load current |
| Leakage Current (IR) | 0.44 μA max at VR = 15.3 V - ensures minimal standby power loss in high-impedance bias networks |
| Surge Current (IRM) | 1010 A peak at 8.3 ms pulse width - provides robust transient overvoltage suppression |
| Junction Temp Range | −65°C to +200°C (non-repetitive pulsed), +150°C max for DC - supports industrial and automotive ambient extremes |
| ESD Rating | Class 3 (>16 kV HBM) - eliminates need for external ESD protection in board-level handling |
Pinout & Package
Package: Axial-lead Surmetic 40 plastic case (Case 017AA), 8.38–8.89 mm body length, 3.30–3.68 mm diameter, cathode indicated by colored band. Lead finish is solderable; max solder temperature 260°C at 1/16″ from case for 10 s.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lower potential node during reverse-bias regulation |
| Cathode | Zener breakdown terminal / high-side connection | Connected to regulated voltage rail; polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Silicon-oxide passivated junction | Enables tight ±5% VZ tolerance and long-term parameter stability vs. standard diffused Zeners |
| Surge rating: 1010 A @ 8.3 ms | Withstands lightning-induced transients and inductive kickback without degradation |
| Pb-free Surmetic 40 package | Meets RoHS compliance requirements while maintaining mechanical robustness and moisture resistance |
| ESD rating >16 kV (HBM) | Eliminates pre-assembly ESD protection circuitry in automated handling environments |
| Max 6 guaranteed electrical parameters | Ensures production consistency across VZ, ZZT, IR, IZK, ZZK, and IZM - reduces incoming inspection burden |
Applications
| Industrial Power Supply Reference | Automotive ECU Voltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated flyback converter auxiliary winding sensing. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing fixed 4.7 V reference for optocoupler biasing. Use Value: Maintains <±1% output regulation across line/load variations due to 260 Ω low dynamic impedance at 2 mA. | Use Scenario: Protecting microcontroller I/O pins from load-dump transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Clamping diode placed between MCU pin and chassis ground to limit voltage to 4.94 V max. Use Value: Survives 1010 A surge pulses per ISO 7637-2 Pulse 5a without parametric shift or catastrophic failure. |
| Medical Instrument Overvoltage Protection | Telecom Line Card Bias Regulation |
Use Scenario: Safeguarding analog front-end inputs in portable ultrasound devices against ESD events. IC Role / Device Role / Timing Role: Primary ESD clamp on signal path, leveraging >16 kV HBM rating to absorb human-body discharges. Use Value: Prevents latch-up or gate oxide damage in downstream amplifiers without adding series resistance or RC filters. | Use Scenario: Generating stable bias voltage for RF power amplifier bias control in base station line cards. IC Role / Device Role / Timing Role: Low-noise shunt reference supplying 4.7 V to DAC-controlled current source. Use Value: Delivers <10 ppm/°C tempco in 4.7 V range (per Fig. 2), minimizing gain drift over −40°C to +85°C operating range. |
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 but SnPb lead finish; no "G" suffix indicates non-Pb-free construction | Not suitable for RoHS-compliant designs requiring Pb-free assembly | Select 1N5337BRLG when Pb-free compliance and tape-and-reel packaging are required |
| BZX85C4V7 | 1.3 W rating, 500 Ω ZZT @ 5 mA, TO-204AA package - lower power and higher impedance than 1N5337BRLG | Used where space constraints favor axial leads but power dissipation is ≤1.3 W | Choose BZX85C4V7 only if system power budget limits Zener dissipation to <1.3 W |
Compared with 1N5337BRLG, the 1N5337B lacks Pb-free certification and requires different procurement logistics, while BZX85C4V7 offers smaller footprint but sacrifices 3.7 W power headroom and 2.4× higher dynamic impedance - making 1N5337BRLG optimal for high-energy clamping and precision reference roles.
Availability
1N5337BRLG is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECU protection circuits, and medical instrumentation requiring stable component supply with full traceability and lifecycle management.
Supply support for 1N5337BRLG 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 discrete Zener regulator product line, engineered for high-reliability voltage reference and transient suppression in harsh-environment power systems.
FAQ
What is the exact zener voltage tolerance and test condition for 1N5337BRLG?
The 1N5337BRLG has a ±5% zener voltage tolerance, specified as 4.47 V minimum to 4.94 V maximum at IZT = 2 mA, with 40 ±10 ms current application prior to measurement at TA = 25°C ±8°C/−2°C. This tolerance applies strictly to the B-suffix device per JEDEC standards and is guaranteed across production lots.
Can 1N5337BRLG be used in surface-mount designs?
No - the 1N5337BRLG uses an axial-lead Surmetic 40 plastic package (Case 017AA) with 3.30–3.68 mm diameter and 8.38–8.89 mm body length. It is not compatible with SMT reflow processes and requires through-hole mounting with 3/8″ lead length for thermal derating compliance.
What is the maximum steady-state current 1N5337BRLG can regulate continuously?
The maximum DC zener current (IZM) for 1N5337BRLG is 1010 mA, calculated as PD/VZ(min) = 5 W / 4.47 V. This assumes TL = 25°C and 3/8″ lead length; actual usable current decreases with rising lead temperature per the 40 mW/°C derating curve.
How does the 1N5337BRLG perform under transient surge conditions?
The 1N5337BRLG sustains 1010 A peak non-repetitive surge current at 8.3 ms pulse width per Figure 5 in the datasheet. Performance is validated with mounting contacts located 3/8″–1/2″ from the diode body, and it remains within specification after single-event exposure without parameter shift.
Is thermal resistance data available for 1N5337BRLG in PCB-mounted configuration?
No - the datasheet specifies only junction-to-lead thermal resistance (θJL = 25°C/W) for 3/8″ lead length, not junction-to-PCB or junction-to-ambient. For PCB thermal design, users must characterize θJA empirically using the provided mechanical outline and standard FR-4 layout practices per JEDEC JESD51.
1N5337BRLG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
1N5337BRLG FAQ
1.How can I place an order for 1N5337BRLG through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5337BRLG 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 1N5337BRLG reliable?
The price and inventory of 1N5337BRLG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5337BRLG is usually 5 days.
3.What payment methods are accepted for 1N5337BRLG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5337BRLG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5337BRLG?
1N5337BRLG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5337BRLG 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 1N5337BRLG?
For technical support, including 1N5337BRLG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5337BRLG requirements.
6.How does Aetrix verify that 1N5337BRLG is sourced from the original manufacturer or authorized distributors?
All 1N5337BRLG 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 1N5337BRLG meets industry standards.
7.What is the process for return or replacement of 1N5337BRLG?
All 1N5337BRLG units undergo pre-shipment inspection (PSI). If there is an issue with 1N5337BRLG, 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 1N5337BRLG part is unused and in its original packaging.
Return procedure for 1N5337BRLG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5337BRLG Tags
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