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onsemi 1N6377RL4
- Part No.:
- 1N6377RL4
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1N6377RL4.pdf
- Description:
- TVS DIODE 15VWM 25VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,553
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Product details
Overview
1N6377RL4 from ON Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics against ESD, lightning-induced surges, and inductive switching transients. It features a 15 V working peak reverse voltage (VRWM), 25 A peak pulse current (IPP), 20.1 V clamping voltage (VC) at IPP, 1500 W peak power dissipation (1 ms), and sub-1 ns response time. It is used in industrial power supplies, medical equipment input stages, and communication line interfaces.
For engineers reviewing the 1N6377RL4 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin over operating voltage, VC vs. device withstand rating, thermal derating above 75°C lead temperature, and axial-leaded mechanical integration in high-surge PCB layouts.
Technical Context
The 1N6377RL4 operates as a Zener-based avalanche clamp, entering conduction when reverse voltage exceeds its 17.6 V minimum breakdown voltage (VBR @ IT = 1 A). Its low dynamic impedance ensures stable clamping under fast-rising transients up to 1500 W, with thermal resistance of 20 °C/W from junction to lead enabling reliable power dissipation at TL ≤ 75°C.
It is rated for Class 3 ESD immunity (>16 kV HBM), exhibits <2 µA leakage at 12 V, and maintains clamping performance across -65°C to +175°C operating range. The Surmetic axial package (Case 41A) supports manual or wave soldering at 260°C for 10 seconds at 1/16″ from case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; must exceed circuit's peak DC or AC voltage. |
| VBR (min) | 17.6 V @ IT = 1 A - Minimum breakdown threshold; defines lower bound of clamping onset under standardized test conditions. |
| VC @ IPP | 20.1 V @ 25 A - Maximum clamped voltage during 1 ms 1500 W surge; determines worst-case stress on protected ICs. |
| PPK | 1500 W @ 1 ms - Peak non-repetitive surge power handling; validated per Figure 5 waveform (tr ≤ 10 ns, tP = 1 ms). |
| Response Time | <1 ns - Time from transient rise to clamping onset; enables protection of high-speed digital interfaces and microcontrollers. |
| IR @ VRWM | <2 µA - Reverse leakage at rated working voltage; negligible loading on 15 V bias rails or signal lines. |
| RJL | 20 °C/W - Junction-to-lead thermal resistance; used to calculate junction temperature rise under steady-state power dissipation. |
Pinout & Package
Package: Axial-leaded Surmetic plastic case (ON Semiconductor Case 41A), Pb-free, void-free thermosetting epoxy. Cathode identified by polarity band. Lead diameter uncontrolled; 1/16″ soldering zone tolerance at 260°C for 10 s.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased reference terminal | Connected to ground or low-impedance return path; forms clamping loop with cathode during transient events. |
| Cathode | Transient voltage sensing node | Connected to protected line (e.g., VCC rail or signal trace); conducts surge current to anode when VRWM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV line-to-line, 2 Ω source impedance) surge compliance without external series impedance. |
| ESD rating >16 kV HBM | Meets IEC 61000-4-2 Level 4 for system-level ESD robustness in medical and industrial front-end circuits. |
| Clamping ratio VC/VBR = 1.14 | Indicates tight voltage control and low dynamic impedance-critical for protecting 3.3 V or 5 V logic with minimal overshoot. |
| Operating temperature range | -65°C to +175°C junction range enables deployment in automotive engine compartments and industrial motor drives. |
| Pb-free Surmetic package | RoHS-compliant axial construction with corrosion-resistant leads and solderability verified per J-STD-002. |
Applications
| Industrial Power Supply Input Protection | Medical Equipment Signal Line Clamping |
|---|---|
Use Scenario: Protecting AC/DC converter primary-side rectifier outputs and secondary-side 15 V bias rails from load dump and EFT bursts. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed in parallel with rail, conducting only during reverse-polarity surges exceeding VRWM. Use Value: Limits transient voltage to 20.1 V, preventing latch-up or gate oxide rupture in downstream regulators and controllers. | Use Scenario: Safeguarding analog sensor inputs (e.g., ECG front-end amplifiers) connected to patient cables exposed to electrostatic discharge. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) clamping element shunting fast ESD pulses away from precision op-amps and ADCs. Use Value: Sub-1 ns response prevents >15 V excursion beyond supply rails, preserving signal integrity and avoiding reset faults. |
| Communication Interface Surge Suppression | Process Control I/O Module Protection |
Use Scenario: Shielding RS-485 transceiver terminals in factory automation networks from induced lightning surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional protection achieved using back-to-back configuration; single 1N6377RL4 handles unidirectional line-to-ground threats. Use Value: Withstands 25 A peak pulse without degradation, maintaining clamping performance over 1000+ surge events per IEC 61000-4-5. | Use Scenario: Guarding 4–20 mA current loop inputs in PLC analog modules against field wiring faults and ground potential differences. IC Role / Device Role / Timing Role: Standoff voltage (VRWM = 15 V) matches typical loop supply headroom; clamps transients before they reach current-sense resistors and isolators. Use Value: Low leakage (<2 µA) avoids measurement error in µA-level current sensing; axial form factor simplifies DIN-rail mount board layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A | Surface-mount SMB package; same VRWM (15 V), slightly higher VC (24.4 V @ 22.5 A); lower PPK (600 W). | Requires PCB rework for SMT placement; better suited for space-constrained designs where axial leads are impractical. | Select when board real estate is limited and surge requirements are ≤600 W; verify thermal pad design for SMBJ15A's 10.5 °C/W RθJA. |
| 1N6377G | Same die and electrical specs; differs only in packaging-bulk box (500 units) vs. tape-and-reel (1500 units); identical Case 41A axial construction. | No functional or layout impact; choice driven by procurement volume and assembly method (manual vs. auto-placement). | Choose 1N6377RL4 for automated reel-fed production; select 1N6377G for prototyping or low-volume hand-soldered builds. |
Compared with SMBJ15A, the 1N6377RL4 delivers 2.5× higher surge power and lower clamping voltage but requires axial through-hole mounting; versus 1N6377G, it offers identical protection performance with optimized logistics for high-volume SMT line feeding.
Availability
1N6377RL4 is available at Aetrix Electronics and suitable for industrial power supplies, medical diagnostic equipment, communication infrastructure hardware, and process control systems requiring stable component supply and long-term obsolescence management.
Supply support for 1N6377RL4 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
ON Semiconductor (now onsemi) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and medical markets.
The 1N6377RL4 belongs to the Mosorb 1N6373–1N6381 series-a family of high-power axial TVS diodes engineered for ruggedized transient suppression in harsh environments where reliability and surge margin are critical.
FAQ
What is the maximum clamping voltage of the 1N6377RL4 under a 25 A transient pulse?
The 1N6377RL4 has a maximum clamping voltage (VC) of 20.1 V when subjected to its rated 25 A peak pulse current (IPP) under the standard 1 ms exponential waveform defined in Figure 5 of the datasheet. This value is measured at TA = 25°C and represents the worst-case voltage seen by protected circuitry during surge conduction. The 1N6377RL4 maintains this clamping performance across its full operating temperature range, with minor derating per Figure 1 for elevated ambient conditions.
Can the 1N6377RL4 be used in bidirectional protection configurations?
The 1N6377RL4 is a unidirectional TVS diode and is not inherently bidirectional. However, it can be used in bidirectional protection schemes when paired with another 1N6377RL4 in series opposition (anode-to-anode or cathode-to-cathode), forming a symmetrical clamp for AC lines or differential signals. This configuration doubles the effective VRWM and provides equal clamping in both polarities. For single-device bidirectional solutions, consider dedicated devices like the P6KE15CA-but note their lower PPK (600 W) versus the 1N6377RL4's 1500 W rating.
What is the thermal derating behavior of the 1N6377RL4 above 75°C lead temperature?
The 1N6377RL4 has a steady-state power dissipation (PD) limit of 5.0 W at TL ≤ 75°C, derating linearly at 20 mW/°C above that temperature. Its junction-to-lead thermal resistance (RJL) is 20 °C/W, meaning a 1 W power dissipation raises junction temperature 20°C above lead temperature. For example, at TL = 100°C, PD drops to 4.5 W. Engineers must apply Figure 4 derating curves and ensure adequate heatsinking or airflow when deploying the 1N6377RL4 in high-temperature enclosures or near heat-generating components.
How does the 1N6377RL4 compare to the 1N6376RL4 in terms of voltage ratings and surge capability?
The 1N6377RL4 has a 15 V VRWM and 17.6 V minimum VBR, while the 1N6376RL4 is rated for 12 V VRWM and 14.1 V minimum VBR. Both share identical 1500 W PPK and 1 ms pulse rating, but the 1N6377RL4 clamps at 20.1 V (vs. 16.1 V for 1N6376RL4) under 25 A IPP. The higher standoff voltage makes the 1N6377RL4 suitable for 15 V systems, whereas the 1N6376RL4 fits 12 V rails. Neither part is interchangeable without verifying system voltage margins and clamping headroom.
Is the 1N6377RL4 compliant with RoHS and REACH regulations?
Yes, the 1N6377RL4 is Pb-free and RoHS-compliant, as indicated by the "G" suffix in its ordering code and explicit statement in the datasheet ("Pb-Free Packages are Available"). It meets EU Directive 2011/65/EU (RoHS 2) and Regulation (EC) No. 1907/2006 (REACH) for SVHC content. The Surmetic Case 41A package uses lead-free solderable terminations and halogen-free molding compound, with full material declarations available via onsemi's Product Change Notifications and compliance portal.
1N6377RL4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-201AD, Axial
- Series:
- Mosorb™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 17.6V
- Voltage - Clamping (Max) @ Ipp:
- 25V
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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
1N6377RL4 FAQ
1.How can I place an order for 1N6377RL4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6377RL4 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 1N6377RL4 reliable?
The price and inventory of 1N6377RL4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6377RL4 is usually 5 days.
3.What payment methods are accepted for 1N6377RL4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6377RL4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6377RL4?
1N6377RL4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6377RL4 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 1N6377RL4?
For technical support, including 1N6377RL4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6377RL4 requirements.
6.How does Aetrix verify that 1N6377RL4 is sourced from the original manufacturer or authorized distributors?
All 1N6377RL4 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 1N6377RL4 meets industry standards.
7.What is the process for return or replacement of 1N6377RL4?
All 1N6377RL4 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6377RL4, 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 1N6377RL4 part is unused and in its original packaging.
Return procedure for 1N6377RL4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6377RL4 Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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