1N4148 - Zener Diode

The 1N4148 is one of the most widely used silicon epitaxial small-signal switching diodes, designed for ultra-fast switching applications. Packaged in a DO-35 glass axial case, it is known for its fast recovery time, low capacitance, and high reliability, making it a staple component in signal processing, logic circuits, protection circuits, and RF applications. Unlike rectifier diodes that are optimized for power handling, or Zener diodes that regulate voltage, the 1N4148 is optimized for fast response and accurate switching at low currents and voltages. It is especially useful where nanosecond switching speed and signal integrity are critical.

Specifications:

1. Type: High-Speed Switching Diode

2. Reverse Recovery Time: ~4 nanoseconds (fast response, suitable up to 100 MHz)

3. Repetitive Peak Reverse Voltage: 100V

4. Continuous Forward Current: 300 mA

5. Non-Repetitive Peak Forward Surge Current: 2A (for 1 μs pulse)

6. Forward Voltage Drop: 0.62V typical @ 10 mA, ~1V max

7. Reverse Leakage Current: ≤ 25 nA @ 20V (low leakage)

8. Junction Capacitance: ~4 pF at 0V, 1 MHz

9. Operating Junction Temperature: -65°C to +200°C

Features:

• Ultra-fast switching speed (nanosecond range).

• Low capacitance for minimal signal distortion.

• Low reverse leakage current, ensuring stable performance.

• Glass-passivated junction for high stability and reliability.

• Compact DO-35 package with axial leads for easy PCB or breadboard mounting.

Applications:

• High-speed switching in digital and analog circuits.

• Signal routing and steering in communication and RF systems.

• Clipping and waveform shaping circuits.

• Small-signal rectification in low-current applications.

• Logic-level circuits requiring nanosecond response.

• Reverse polarity protection for sensitive electronics.

• Voltage multiplier circuits in power supplies.

• Test and measurement equipment requiring fast signal response.

Package Includes:

1N4148 - Zener Diode

Return Policy Overview

At ROBODIUM™, we want you to be completely satisfied with your purchase. You may return most items within 7 days of delivery for a full refund or exchange.

Return Window

• Standard Returns: 7 days from delivery date for any reason, including if you simply changed your mind.
• Defective/Damaged Items: 7 days from delivery date for items received damaged or defective.
• Manufacturing Defects (Warranty): 15 days from delivery for manufacturing defects, unless a different warranty period is specified on the product page.

What Can Be Returned

Most items sold on ROBODIUM™ can be returned within the return window, including:

• Items you no longer need or changed your mind about
• Products received in damaged condition
• Items with manufacturing defects
• Wrong items received (item mismatch)
• Missing components inside the package

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To be eligible for a return, items must be:

• In their original, unused condition
• In the original packaging with all accessories, manuals, and free gifts (if any)
• Accompanied by proof of purchase

Note: Products damaged due to misuse, modification, static discharge, soldering, or improper handling may not be eligible for return.

How to Initiate a Return

1. Contact us via email at support@robodium.com or call +91 8123109966
2. Provide your order number and reason for return
3. Submit photos/videos of the item (especially for damaged/defective products)
4. Our team will review and approve your return request within 1-2 business days

Return Pickup Process

We arrange the return pickup for you - hassle-free returns similar to major e-commerce platforms.

• Once your return is approved, we will coordinate pickup from your location.
• Pack the product securely in its original packaging.
• Include a copy of the order confirmation or packing list.
• Keep the package ready - our logistics partner will collect it at the scheduled time.

Return Shipping Costs

• Defective, damaged, or wrong items: ROBODIUM™ covers all return shipping costs. No charges to you.
• Change of mind returns: A flat return shipping fee of ₹100 will be deducted from your refund amount.

Refund Process

• Refund Method: Refunds are processed to your original payment method.
• Processing Time: 5-7 business days after we receive and inspect the returned item.
• Refund Amount: Full purchase price minus any applicable return shipping fees.
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Replacements

• Once the returned item is inspected and approved, we ship the replacement at no additional cost.
• Replacement items are dispatched within 2 business days of receiving your return.
• If replacement is unavailable, we provide a full refund.

Warranty Terms

All products include a minimum 15-day warranty against manufacturing defects unless otherwise specified on the product page.

Warranty does not cover: misuse, soldering damage, modifications, physical damage, or incorrect electrical connections.

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• Orders in Pending or Payment Verification status can be canceled for a full refund.
• Contact us immediately at support@robodium.com to cancel before shipping.
• Once an order is shipped, it cannot be canceled but can be returned after delivery.

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• Return Request Review: 1-2 business days
• Issue Resolution: Within 48 hours of verification