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Semtech Corporation JAN1N4249
- Part No.:
- JAN1N4249
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
JAN1N4249.pdf
- Description:
- DIODE GEN PURP 1KV 1A AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,684
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Product details
Overview
JAN1N4249 from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection on 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), and stable 27.5–28V clamping across temperature and current range - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the JAN1N4249 datasheet, pinout, applications, or equivalent options, this device delivers constant-clamp performance critical for protecting sensitive 22V bus interfaces where conventional TVS diodes exhibit rising clamping voltage with surge current or temperature.
Technical Context
The JAN1N4249 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 threshold. Unlike standard TVS diodes, its clamping voltage remains nearly flat due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C, maintains ≤600nA reverse leakage at 22V, and exhibits only 20mΩ dynamic resistance (8/20μs), enabling low-voltage overshoot suppression without thermal derating penalties typical of junction-based TVS devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC or RMS operating voltage on protected line without leakage or conduction. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures downstream 22V-rated ICs (e.g., USB PD controllers) remain below damage threshold during surge events. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 22V systems. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD robustness requirements for exposed connectors. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for 22V power rail protection without signal integrity impact on adjacent traces. |
| Dynamic Resistance | 20mΩ (8/20μs) - enables minimal voltage rise under high di/dt transients, preserving clamping stability. |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, RoHS-compliant, UL 94V-0 molding compound, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected to maximize current handling and minimize inductance. |
| Pins 4, 5, 6 | IN | Protected line input (e.g., VBUS or power rail); parallel connection provides low-inductance, high-current path to GND during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Constant clamping voltage | 27.5–28V across full 24–40A surge range and –40°C to +125°C - eliminates need for thermal derating margins in high-temp environments. |
| FET-based shunt architecture | Replaces PN-junction TVS with low-RDS(on) MOSFET - avoids voltage rise from fixed RDYN, enabling tighter clamping control. |
| High-energy surge capability | 1120W peak pulse power (8/20μs) - supports repeated lightning-surge-level transients without degradation. |
| Low leakage & capacitance | ≤600nA IR at 22V and 175pF CJ - minimizes standby power loss and avoids loading on 22V supply rails. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBUS lines in USB-C receptacles supporting up to 20V/5A PD negotiation, exposed to ESD and system-level surges. IC Role / Device Role / Timing Role: Primary front-end EOS suppressor placed immediately after connector, clamping transients before reaching PD controller and load switch. Use Value: Maintains 27.5–28V clamping at 40A and 125°C - prevents overvoltage damage to 22V-rated PD controllers where standard TVS would exceed 35V at same conditions. |
Use Scenario: Front-end protection for industrial-grade load switches (e.g., HS2950P) powering remote sensors, actuators, or metering circuits. IC Role / Device Role / Timing Role: Surge diverter placed between input source and load switch EN/VIN pins to prevent gate oxide damage and internal FET failure. Use Value: Limits clamping voltage below 30V - stays within safe operating area of 30V-rated load switch inputs, avoiding latch-up or permanent gate damage during 1kV/42Ω surges. |
| IoT Device Power Rail Protection | Storage Device 22V Bus Protection |
Use Scenario: Securing 22V auxiliary power rails in battery-backed IoT gateways subjected to field ESD and induced surges from nearby AC wiring. IC Role / Device Role / Timing Role: Single-device solution for unidirectional 22V rail protection, replacing multi-component TVS+RC networks. Use Value: 1.6mm × 1.6mm footprint saves >60% board space vs. discrete TVS + series resistor solutions while delivering superior clamping consistency. |
Use Scenario: Protecting 22V backup power inputs in NVMe SSD enclosures or enterprise storage backplanes exposed to hot-plug transients and chassis ESD. IC Role / Device Role / Timing Role: High-reliability EOS guard on 22V VDDQ or auxiliary bias rail, ensuring data integrity during unexpected power events. Use Value: ±30kV ESD rating and stable clamping ensure no bit errors or controller resets caused by transient-induced voltage spikes on critical bias rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Same die, identical electrical specs and package - JAN1N4249 is the military-grade qualified variant of TDS2211P per MIL-PRF-19500/560. | Qualified for extended temperature (-55°C to +150°C) and enhanced reliability screening per JAN spec. | Select JAN1N4249 for aerospace, defense, or high-reliability industrial programs requiring MIL-qualified components. |
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A; higher clamping, no constant-voltage behavior. | Limited to lower-energy transients; clamping rises to >40V at 40A and degrades above 85°C. | Use SMAJ22A only in cost-sensitive, non-critical 22V applications where clamping voltage margin >13V is acceptable. |
Compared with TDS2211P and SMAJ22A, JAN1N4249 offers identical core protection performance but adds MIL-qualified reliability, extended junction temperature limits (–55°C to +150°C), and enhanced screening - making it the sole choice for mission-critical 22V rail protection where field failure is unacceptable.
Availability
JAN1N4249 is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch designs, and high-reliability IoT power rail protection requiring stable component supply across extended temperature and long lifecycle programs.
Supply support for JAN1N4249 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 semiconductor company specializing in high-performance analog and mixed-signal ICs for precision protection, sensing, and signal integrity.
JAN1N4249 belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-energy, high-reliability 22V bus protection applications where clamping stability across temperature and current is mandatory.
FAQ
What is the key functional difference between JAN1N4249 and standard TVS diodes?
JAN1N4249 uses a surge-rated FET and precision trigger circuit instead of a PN junction, resulting in near-constant clamping voltage (27.5–28V) across its full 24–40A surge range and –55°C to +150°C operating temperature. Standard TVS diodes exhibit linearly rising clamping voltage with both current and temperature - a limitation JAN1N4249 eliminates by design.
Is JAN1N4249 pin-compatible with TDS2211P?
Yes, JAN1N4249 is the MIL-qualified version of TDS2211P and shares identical pin configuration (Pins 1–3 = GND, Pins 4–6 = IN), mechanical dimensions (1.6mm × 1.6mm DFN), and solder land pattern. It can be used as a drop-in replacement in existing TDS2211P layouts without PCB modification.
What is the maximum continuous operating voltage for JAN1N4249?
JAN1N4249 has a reverse stand-off voltage (VRWM) of 22V, meaning it reliably blocks up to 22V DC or RMS voltage in normal operation with leakage current ≤600nA. Exceeding 22V risks premature conduction and accelerated wear - it is not rated for sustained operation above this value.
Does JAN1N4249 require a thermal pad or heatsink?
No, JAN1N4249 does not require a thermal pad or external heatsink. Its FET-based architecture dissipates surge energy with minimal junction heating, and the datasheet explicitly states "no thermal pad is needed." Proper PCB layout - including multiple vias from GND pins to inner ground planes - is sufficient for thermal and electrical performance.
Can JAN1N4249 protect bidirectional signal lines like USB DP/DM?
No, JAN1N4249 is a unidirectional suppressor intended for 22V power or single-ended I/O lines. It is not suitable for high-speed bidirectional data lines such as USB DP/DM, which require ultra-low-capacitance (<0.3pF), symmetric TVS devices like RClamp3371ZC. JAN1N4249's 175pF capacitance and asymmetric structure make it inappropriate for signal integrity–sensitive data paths.
JAN1N4249 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- Axial
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 1000 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 1 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 2 µs
- Current - Reverse Leakage @ Vr:
- 1 µA @ 1000 V
- Capacitance @ Vr, F:
- -
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/286
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
- Operating Temperature - Junction:
- -
JAN1N4249 FAQ
1.How can I place an order for JAN1N4249 through Aetrix?
Please submit a Request for Quotation (RFQ) for JAN1N4249 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 JAN1N4249 reliable?
The price and inventory of JAN1N4249 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JAN1N4249 is usually 5 days.
3.What payment methods are accepted for JAN1N4249?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JAN1N4249 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JAN1N4249?
JAN1N4249 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JAN1N4249 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 JAN1N4249?
For technical support, including JAN1N4249 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JAN1N4249 requirements.
6.How does Aetrix verify that JAN1N4249 is sourced from the original manufacturer or authorized distributors?
All JAN1N4249 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 JAN1N4249 meets industry standards.
7.What is the process for return or replacement of JAN1N4249?
All JAN1N4249 units undergo pre-shipment inspection (PSI). If there is an issue with JAN1N4249, 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 JAN1N4249 part is unused and in its original packaging.
Return procedure for JAN1N4249:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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