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onsemi 1N5335B
- Part No.:
- 1N5335B
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5335B.pdf
- Description:
- DIODE ZENER 3.9V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:7,411
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Product details
Overview
1N5335B from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 3.9 V, ±5% tolerance, maximum zener impedance of 320 Ω at 2 mA test current, and surge rating of 1220 A at 8.3 ms - used for precision low-voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N5335B datasheet, pinout, applications, or equivalent options, this device serves as a stable, high-surge-capable voltage reference in DC-DC converter feedback loops, battery charge controllers, and industrial sensor signal conditioning where tight voltage regulation and robust ESD immunity (>16 kV HBM) are required.
Technical Context
The 1N5335B operates as a silicon-oxide passivated junction Zener regulator, optimized for stable reverse-biased breakdown at 3.9 V with low dynamic impedance (320 Ω @ IZT = 2 mA) and minimal voltage drift under thermal stress. Its design supports precise voltage clamping in low-power analog references and feedback networks.
It features Class 3 ESD immunity (>16 kV HBM), 180 W non-repetitive surge capability at 8.3 ms, and a maximum steady-state power dissipation of 5 W at TL = 25°C with 3/8″ lead length - all enabled by its void-free transfer-molded plastic package (Case 017AA) and corrosion-resistant leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.71 V (min) to 4.10 V (max) at IZT = 2 mA - ensures tight 3.9 V nominal regulation for low-voltage reference stability |
| Zener Impedance (ZZT) | 320 Ω max at IZT = 2 mA - maintains low output impedance for minimal regulation error under load variation |
| Max DC Zener Current (IZM) | 1220 mA - derived from PD = 5 W / VZ, enabling sustained regulation in medium-current bias networks |
| Surge Current (IR) | 1220 A peak @ 8.3 ms - provides transient overvoltage resilience in unregulated input stages |
| Reverse Leakage (IR) | 0.54 µA max @ VR = 17.6 V - ensures negligible standby current in high-impedance reference paths |
| Junction-to-Lead Thermal Resistance (θJL) | 25 °C/W - allows direct thermal path to PCB traces or heatsinks via axial leads for reliable 5 W operation |
| ESD Rating (HBM) | Class 3 (>16 kV) - protects against handling-induced electrostatic discharge during assembly and field operation |
Pinout & Package
Package: Axial-lead, transfer-molded plastic (Case 017AA), cathode indicated by band. Dimensions: 8.38–8.89 mm length (A), 3.30–3.68 mm diameter (B), 0.94–1.09 mm lead diameter (D), 25.4–31.75 mm lead length (K).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in reverse-bias configuration; establishes ground-referenced regulation point |
| Cathode | Zener breakdown terminal / regulated output node | Connected to higher-potential side; delivers stable 3.9 V reference when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Guarantees 3.71–4.10 V regulation window without post-manufacturing trimming |
| Silicon-oxide passivated junction | Enables stable long-term voltage characteristics and reduced parameter drift over temperature and time |
| 180 W surge rating at 8.3 ms | Withstands common AC line transients and inductive kickback without degradation |
| Pb-free compliant (G suffix) | Meets RoHS Directive 2011/65/EU and JEDEC J-STD-609A standard for lead-free soldering compatibility |
| Corrosion-resistant, solderable leads | Supports reliable wave and hand-soldering at 260°C for 10 seconds at 1/16″ from case |
Applications
| Power Supply Reference | Battery Charge Control |
|---|---|
Use Scenario: Providing stable 3.9 V reference for TL431-based adjustable shunt regulators in offline AC-DC adapters. IC Role / Device Role / Timing Role: Zener voltage reference element setting feedback divider ratio and output voltage accuracy. Use Value: Tight ±5% tolerance and low 320 Ω impedance minimize output voltage drift across line/load/temperature variations. |
Use Scenario: Clamping battery pack voltage during CC/CV charging cycles in portable medical devices. IC Role / Device Role / Timing Role: Overvoltage protection clamp limiting cell voltage to safe threshold before BMS intervention. Use Value: 1220 A surge rating absorbs transient spikes from charger switching noise without failure. |
| Sensor Signal Conditioning | Industrial PLC Input Protection |
Use Scenario: Biasing and referencing 4–20 mA transmitter circuits operating from 12 V loop supplies. IC Role / Device Role / Timing Role: Low-voltage Zener reference establishing precision current sink threshold and offset calibration point. Use Value: Sub-microamp leakage (0.54 µA) prevents loading of high-impedance sensor bridges and op-amp inputs. |
Use Scenario: Protecting digital input channels from induced surges on factory floor wiring harnesses. IC Role / Device Role / Timing Role: Primary clamping device diverting fast transients before they reach optocoupler or microcontroller GPIO. Use Value: >16 kV HBM ESD rating and 1220 A surge capacity meet IEC 61000-4-2 Level 4 and IEC 61000-4-5 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5334B | Nominal VZ = 3.6 V (vs. 3.9 V); 350 Ω ZZT @ 2.5 mA; 1320 A surge rating | Lower regulation voltage suits 3.3 V logic rail monitoring; slightly higher impedance affects precision feedback | Select when system requires tighter 3.6 V threshold and can accommodate marginally higher dynamic impedance |
| 1N5336B | Nominal VZ = 4.3 V (vs. 3.9 V); 290 Ω ZZT @ 2 mA; 1100 A surge rating | Higher regulation voltage fits 5 V supply supervision; lower impedance improves load regulation | Choose for 4.3 V reference needs where improved impedance performance outweighs voltage shift |
Compared with 1N5334B and 1N5336B, the 1N5335B offers the optimal balance of 3.9 V nominal regulation, 320 Ω impedance, and 1220 A surge capability - making it preferred for applications requiring mid-range low-voltage reference stability with high transient resilience.
Availability
1N5335B is available at Aetrix Electronics and suitable for power supply reference design, battery management systems, sensor interface circuits, and industrial input protection requiring stable component supply and full traceability.
Supply support for 1N5335B 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, and IoT applications.
The 1N53 Series belongs to onsemi's Surmetic™ 40 Zener regulator family, engineered for high-reliability voltage reference and clamping in harsh environments - emphasizing tight tolerance, high surge immunity, and Pb-free manufacturability.
FAQ
What is the nominal zener voltage and tolerance of the 1N5335B?
The 1N5335B has a nominal zener voltage of 3.9 V with a guaranteed tolerance of ±5%, corresponding to a minimum of 3.71 V and maximum of 4.10 V at IZT = 2 mA. This tight tolerance ensures predictable regulation in feedback networks without external trimming, and is confirmed in the onsemi datasheet Rev. 19 (July 2024) Table on page 2.
What is the maximum steady-state power dissipation for the 1N5335B?
The 1N5335B is rated for a maximum steady-state power dissipation of 5 W at lead temperature (TL) = 25°C with 3/8″ lead length. Derating is required above 25°C at 40 mW/°C, and junction-to-lead thermal resistance is specified as 25 °C/W - all verified per the "Maximum Ratings" table on page 1 of the official onsemi datasheet.
How does the 1N5335B handle electrical surges?
The 1N5335B supports a peak non-repetitive surge current of 1220 A at 8.3 ms pulse width, corresponding to an 180 W surge rating. This capability is validated per Figure 5 and Note 4 in the onsemi datasheet, and enables robust protection against common-mode transients in industrial and automotive power interfaces.
Is the 1N5335B RoHS-compliant and lead-free?
Yes, the 1N5335B is offered in a Pb-free package (indicated by the "G" suffix in ordering codes such as 1N5335BG). It complies with RoHS Directive 2011/65/EU and JEDEC J-STD-609A, and supports lead-free reflow and wave soldering up to 260°C for 10 seconds - as documented in the "Ordering Information" and "Mechanical Characteristics" sections of the onsemi datasheet.
What is the zener impedance of the 1N5335B and why does it matter?
The 1N5335B has a maximum zener impedance (ZZT) of 320 Ω at IZT = 2 mA. This value directly impacts regulation accuracy: lower impedance means smaller output voltage variation under changing load current, making the 1N5335B suitable for precision reference applications where stability across operating conditions is critical.
1N5335B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 50 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
1N5335B FAQ
1.How can I place an order for 1N5335B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5335B 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 1N5335B reliable?
The price and inventory of 1N5335B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5335B is usually 5 days.
3.What payment methods are accepted for 1N5335B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5335B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5335B?
1N5335B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5335B 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 1N5335B?
For technical support, including 1N5335B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5335B requirements.
6.How does Aetrix verify that 1N5335B is sourced from the original manufacturer or authorized distributors?
All 1N5335B 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 1N5335B meets industry standards.
7.What is the process for return or replacement of 1N5335B?
All 1N5335B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5335B, 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 1N5335B part is unused and in its original packaging.
Return procedure for 1N5335B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5335B Tags
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BZT52C5V6T-7
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BZX84C3V3LT1G
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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