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Semtech Corporation 1N6124A
- Part No.:
- 1N6124A
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- Axial
- Datasheet:
-
1N6124A.pdf
- Description:
- TVS DIODE 42.6VWM 77VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,311
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Product details
Overview
1N6124A from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, and 20mΩ dynamic resistance. It protects USB PD, Type-C VBus, and load switch inputs in industrial and portable electronics.
For engineers reviewing the 1N6124A datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, clamping stability across temperature and current, and direct alternatives for 22V bus protection with low-voltage overshoot control.
Technical Context
The 1N6124A uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant - ~27.6V at both 24A and 40A - due to decreasing RDS(on) under surge conditions.
It operates from −40°C to +125°C with stable 22V reverse stand-off voltage, <600nA leakage at VRWM, and 175pF junction capacitance at 22V/1MHz. Its functional architecture enables reliable protection where thermal derating and voltage overshoot limit traditional TVS performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Stand-Off Voltage | 22 V - Maximum continuous DC or RMS operating voltage before conduction begins. |
| Clamping Voltage (40A, 8/20μs) | 27.6–28 V - Peak voltage seen by protected circuit during worst-case surge; enables safe margin below 24V IC damage thresholds. |
| Peak Pulse Current | 40 A (8/20μs) - Withstands industrial-level surges per IEC 61000-4-5 without failure. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - Robust handling of human-body-model and system-level ESD events. |
| Dynamic Resistance | 20 mΩ - Low ON-resistance ensures minimal voltage rise under high-current transients. |
| Junction Capacitance | 175 pF @ 22V, 1MHz - Low enough for 22V power rail protection without signal integrity impact. |
| Operating Temperature | −40°C to +125°C - Full spec compliance across automotive and industrial ambient ranges. |
Pinout & Package
1N6124A is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6 mm × 1.6 mm × 0.55 mm with exposed thermal pad not required. All six terminals are electrically active: three input pins and three ground pins must be connected in parallel for rated 40A surge capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path; all three must be connected to minimize inductance and maximize surge current handling. |
| Pins 4, 5, 6 | IN | Protected line input; tied together to interface with 22V bus or power rail requiring EOS suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.4 V across full 24–40A surge range - eliminates design margin inflation needed with TVS diodes. |
| FET-based shunt protection | Surge energy dissipated in low-RDS(on) channel instead of PN junction - enables stable performance over temperature. |
| High EFT immunity | ±4 kV per IEC 61000-4-4 (5/50 ns, 100 kHz & 5 kHz bursts) - robust against repetitive fast transients in noisy industrial environments. |
| Low-leakage operation | ≤600 nA at 22 V - negligible standby power loss and no measurable impact on 22V rail regulation. |
| Small-footprint DFN | 1.6 mm × 1.6 mm area - saves >50% board space vs. comparable SO-8 or SOT-23 TVS solutions. |
Applications
| USB Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–22V VBus lines in USB Type-C ports supporting up to 100W PD negotiation. IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed between connector and PD controller or buck converter input. Use Value: Maintains clamping at ≤28V across temperature and current - prevents overvoltage damage to PD controllers rated for 24V absolute max. |
Use Scenario: Safeguarding enable and input pins of high-side load switches (e.g., HS2950P) in remote meters and robotics. IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage overshoot during lightning-induced surges on 22V supply rails. Use Value: Keeps clamped voltage below internal FET drain-source breakdown, avoiding latch-up or permanent switch failure. |
| IoT Edge Node Power Rail Protection | Notebook/Tablet 22V Auxiliary Supply Protection |
Use Scenario: Securing 22V auxiliary rails powering cellular modems or sensor hubs in battery-backed IoT gateways. IC Role / Device Role / Timing Role: Single-device solution for combined ESD, EFT, and surge immunity on compact PCBs with limited layer count. Use Value: Eliminates need for multi-stage protection (TVS + MOV + filter) while meeting IEC 61000-4-2/4-4/4-5 with one component. |
Use Scenario: Protecting 22V DC-in rails in ultrabooks and tablets accepting third-party chargers with poor surge compliance. IC Role / Device Role / Timing Role: Clamp device placed immediately after barrel jack or USB-C receptacle to prevent transient coupling into PMIC inputs. Use Value: 175pF capacitance avoids resonance issues with typical 10–100μF input bulk caps; no signal integrity penalty on power path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Identical electrical specs, same DFN-6 package, identical marking code T22 - confirmed drop-in replacement per Semtech documentation. | No functional difference; used interchangeably in USB PD and load switch designs. | Select TDS2211P when sourcing directly from Semtech distribution channels; identical form, fit, and function. |
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.5A (8/20μs); higher clamping, lower IPP (12.5A), larger SMA package. | Limited to lower-energy surges; clamping rises significantly above 22V - unsuitable where 24V ICs require tight voltage margins. | Use SMAJ22A only in cost-sensitive, low-surge environments where 35.5V clamping is acceptable and board space allows SMA footprint. |
Compared with 1N6124A, TDS2211P offers identical protection performance and mechanical compatibility, while SMAJ22A provides lower-cost surge suppression at the expense of higher clamping voltage, reduced peak current rating, and larger board area - making it suitable only for non-critical 22V lines with relaxed voltage margins.
Availability
1N6124A is available at Aetrix Electronics and suitable for USB Power Delivery systems, industrial load switch interfaces, and IoT edge node power rails requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for 1N6124A 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
Semtech Corporation is a U.S.-based fabless semiconductor company specializing in analog and mixed-signal ICs for precision sensing, protection, and connectivity.
The 1N6124A belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 22V power rail protection where stable clamping and temperature insensitivity are critical.
FAQ
What is the maximum clamping voltage of the 1N6124A at 40A surge current?
The 1N6124A clamps at 27.6–28 V under 40A peak pulse current (8/20μs waveform), as specified in its electrical characteristics table. This value remains stable across −40°C to +125°C, distinguishing it from conventional TVS diodes whose clamping voltage increases with temperature and current.
Is the 1N6124A pin-compatible with other Semtech TDS devices like TDS2211P?
Yes - the 1N6124A shares identical pin configuration, DFN-6 package dimensions, and terminal assignment (Pins 1–3 = GND, Pins 4–6 = IN) with TDS2211P. Semtech documentation confirms these are functionally and mechanically interchangeable parts for 22V EOS protection applications.
Does the 1N6124A require a thermal pad or heatsink for 40A surge handling?
No - the 1N6124A dissipates surge energy in its low-RDS(on) FET channel rather than a thermally limited PN junction, and its DFN-6 package does not include or require an exposed thermal pad. Layout guidelines emphasize low-inductance grounding via multiple vias, not thermal mass.
Can the 1N6124A protect high-speed data lines such as USB SuperSpeed or PCIe?
No - the 1N6124A has 175pF junction capacitance, optimized for 22V power rail or low-frequency I/O protection. For data lines, Semtech recommends low-capacitance TVS devices like RClamp3371ZC (<0.25pF); using 1N6124A on high-speed traces would cause signal integrity degradation.
What is the reverse leakage current of the 1N6124A at its rated 22V working voltage?
At 22V reverse stand-off voltage and 25°C, the 1N6124A exhibits reverse leakage current of 130–600 nA. This ultra-low leakage ensures minimal power loss and no measurable impact on voltage regulation in 22V systems, even at elevated temperatures.
1N6124A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- Axial
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 42.6V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 6.5A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N6124A FAQ
1.How can I place an order for 1N6124A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6124A 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 1N6124A reliable?
The price and inventory of 1N6124A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6124A is usually 5 days.
3.What payment methods are accepted for 1N6124A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6124A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6124A?
1N6124A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6124A 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 1N6124A?
For technical support, including 1N6124A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6124A requirements.
6.How does Aetrix verify that 1N6124A is sourced from the original manufacturer or authorized distributors?
All 1N6124A 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 1N6124A meets industry standards.
7.What is the process for return or replacement of 1N6124A?
All 1N6124A units undergo pre-shipment inspection (PSI). If there is an issue with 1N6124A, 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 1N6124A part is unused and in its original packaging.
Return procedure for 1N6124A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6124A Tags
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