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onsemi 1N6277ARL4G
- Part No.:
- 1N6277ARL4G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1N6277ARL4G.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:1,437
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Product details
Overview
1N6277ARL4G from ON Semiconductor is a unidirectional 1500 W Mosorb transient voltage suppressor (TVS) diode in axial lead Surmetic package, with 15.3 V working peak reverse voltage (VRWM), 18 V breakdown voltage (VBR) at 1 mA test current, and 25.2 V clamping voltage (VC) at 59.5 A peak pulse current. It protects CMOS/MOS/Bipolar ICs in power supplies and industrial control systems against ESD and lightning-induced surges.
For engineers reviewing the 1N6277ARL4G datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ circuit operating voltage, VC margin below protected device's absolute maximum rating, UL 497B recognition for isolated loop protection, and <1 ns response time for fast transients.
Technical Context
This TVS operates as a voltage-clamping device in parallel with sensitive electronics, entering avalanche conduction when reverse voltage exceeds VBR (17.1–18.9 V). Its low dynamic impedance and sub-nanosecond response enable effective suppression of 8.3 ms half-sine surges up to 1500 W without thermal runaway.
Designed for unidirectional protection only, it features cathode-band polarity marking, Pb-free axial lead (Case 41A) construction, and UL 497B certification for isolated loop circuits - distinguishing it from bidirectional or non-certified alternatives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 15.3 V - maximum continuous reverse operating voltage before clamping begins; must exceed system DC/peak AC rail voltage. |
| VBR @ IT=1 mA | 17.1–18.9 V - breakdown threshold range; defines onset of avalanche conduction under standardized test conditions. |
| VC @ IPP=59.5 A | 25.2 V - maximum clamped voltage during 1500 W surge; determines worst-case stress on downstream components. |
| IPP | 59.5 A - peak pulse current supported at 1 ms pulse width; correlates directly with surge energy handling (1500 W). |
| IR @ VRWM | <5 µA - reverse leakage at rated working voltage; ensures minimal standby power loss and signal integrity in high-impedance circuits. |
| Response Time | <1 ns - time to transition from off-state to clamping; critical for protecting nanosecond-scale logic and communication interfaces. |
| ESD Rating | Class 3 (>16 kV HBM) - qualifies for robust electrostatic discharge immunity in handling and operation. |
Pinout & Package
1N6277ARL4G uses an axial-leaded Surmetic plastic package (Case 41A), with cathode identified by a colored band. Leads are tin-plated, solderable at 260°C for 10 seconds at 1/16 inch from case body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground-reference terminal in unidirectional configuration | Connected to system ground or low-side reference; completes clamping path during reverse transient. |
| Cathode | Protected-line terminal | Connected to line being protected (e.g., +12 V rail); polarity band marks this terminal for correct orientation. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge testing without degradation when properly mounted. |
| UL 497B recognition | Validated for use in isolated telecom/data line protection circuits - not just generic surge suppression. |
| Low zener impedance | Minimizes voltage overshoot during fast-rising transients (<1 ns), reducing risk of latch-up in adjacent ICs. |
| Pb-free Surmetic package | RoHS-compliant axial construction with void-free molding and corrosion-resistant finish for long-term reliability. |
| Temperature coefficient of VBR | 0.088 %/°C - enables predictable clamping voltage shift across −65°C to +175°C operating range. |
Applications
| Industrial Power Supply Protection | Medical Equipment Input Stage |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient overvoltage on main supply rail before it reaches DC-DC converters and microcontrollers. Use Value: Limits rail excursion to ≤25.2 V during 59.5 A surges, preserving 30 V absolute maximum rating of downstream regulators and logic. | Use Scenario: Isolated sensor interface in patient-monitoring equipment connected to external analog inputs. IC Role / Device Role / Timing Role: UL 497B-certified transient suppressor on secondary side of isolated signal path to meet IEC 60601-1 creepage/clearance and surge immunity requirements. Use Value: Provides certified protection without compromising galvanic isolation integrity or adding capacitance-induced signal delay. |
| Telecom Line Interface | Process Control Analog I/O Module |
Use Scenario: RS-485 transceiver bus lines in outdoor base station equipment subject to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Primary unidirectional clamp on VCC-supplied termination network, coordinated with GDT or MOV for staged protection. Use Value: Fast <1 ns response captures initial surge edge before slower devices activate, reducing total let-through energy to transceiver ESD structures. | Use Scenario: 4–20 mA current loop input card in factory automation PLC rack exposed to field wiring transients. IC Role / Device Role / Timing Role: Rail-to-rail TVS on loop power supply input, placed immediately upstream of precision shunt regulator and op-amp front-end. Use Value: Clamps 1500 W surges while maintaining <5 µA leakage, preventing offset drift and measurement error in µA-level sensing circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | Surface-mount SMB package; 18 V VBR; 28.8 V VC @ 53.5 A; 600 W rating | Limited to PCB space-constrained designs; lower surge capacity requires derating in high-energy environments | Select when board layout favors SMT and surge threat level is ≤IEC 61000-4-5 Level 3. |
| 1.5KE18A | Same axial Case 41A package; identical electrical specs; differs only in packaging format (bulk vs. tape/reel) | No functional difference; same UL 497B recognition and thermal performance | Choose for cost-sensitive volume procurement where tape-and-reel is not required. |
Compared with SMBJ18A, 1N6277ARL4G delivers 2.5× higher surge power handling and proven axial-lead robustness for chassis-mounted or wire-ended installations; compared with 1.5KE18A, it shares full electrical and mechanical equivalence but offers Pb-free tape-and-reel delivery optimized for automated assembly.
Availability
1N6277ARL4G is available at Aetrix Electronics and suitable for industrial power supplies, medical instrumentation, telecom infrastructure, and process control systems requiring stable component supply and UL-recognized surge protection.
Supply support for 1N6277ARL4G 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 is a global semiconductor manufacturer specializing in power management, analog, sensors, and discrete devices for automotive, industrial, and cloud power applications.
The 1N6277ARL4G belongs to the 1N6267A Series Mosorb TVS family, engineered specifically for high-energy unidirectional transient suppression in safety-critical and UL-regulated systems such as medical and telecom equipment.
FAQ
What is the clamping voltage of the 1N6277ARL4G under maximum surge conditions?
The 1N6277ARL4G has a maximum clamping voltage (VC) of 25.2 V when subjected to its rated peak pulse current of 59.5 A, measured using the standard 1 ms exponential waveform per Figure 5 in the datasheet. This value ensures protected circuits remain below critical voltage thresholds during transient events, and is validated across the full operating temperature range of −65°C to +175°C.
Is the 1N6277ARL4G RoHS compliant and what does the "RL4G" suffix indicate?
Yes, the 1N6277ARL4G is RoHS compliant. The "G" suffix explicitly denotes a Pb-free package, and "RL4" specifies tape-and-reel packaging with 1500 units per reel. This configuration supports automated SMT placement while meeting environmental compliance requirements for commercial and industrial end equipment.
Does the 1N6277ARL4G have UL recognition and for which standard?
Yes, the 1N6277ARL4G carries UL Recognition under UL 497B for protectors (File #E210057, Category QVGQ2). This certification validates its suitability for isolated loop circuit protection - including dielectric withstand, endurance conditioning, and strike voltage breakdown tests - distinguishing it from non-certified TVS diodes used only for general-purpose surge suppression.
How does the 1N6277ARL4G differ from bidirectional TVS diodes like P6KE18A?
The 1N6277ARL4G is unidirectional and designed for DC or single-polarity line protection, offering lower leakage (<5 µA) and tighter VBR tolerance than bidirectional equivalents. In contrast, P6KE18A provides symmetrical clamping for AC lines but exhibits higher leakage and reduced DC blocking capability - making 1N6277ARL4G preferable for 24 V industrial rails and regulated power inputs where reverse-bias integrity is essential.
What is the thermal resistance and steady-state power rating of the 1N6277ARL4G?
The 1N6277ARL4G has a junction-to-lead thermal resistance (RJL) of 20°C/W and a steady-state power dissipation (PD) of 5.0 W at TL ≤ 75°C with 3/8-inch lead length. Derating is linear above 75°C at 20 mW/°C, enabling reliable operation in enclosed industrial enclosures where ambient temperatures may reach 70°C without forced airflow.
1N6277ARL4G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-201AD, Axial
- Series:
- Mosorb™
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- 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
1N6277ARL4G FAQ
1.How can I place an order for 1N6277ARL4G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6277ARL4G 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 1N6277ARL4G reliable?
The price and inventory of 1N6277ARL4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6277ARL4G is usually 5 days.
3.What payment methods are accepted for 1N6277ARL4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6277ARL4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6277ARL4G?
1N6277ARL4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6277ARL4G 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 1N6277ARL4G?
For technical support, including 1N6277ARL4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6277ARL4G requirements.
6.How does Aetrix verify that 1N6277ARL4G is sourced from the original manufacturer or authorized distributors?
All 1N6277ARL4G 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 1N6277ARL4G meets industry standards.
7.What is the process for return or replacement of 1N6277ARL4G?
All 1N6277ARL4G units undergo pre-shipment inspection (PSI). If there is an issue with 1N6277ARL4G, 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 1N6277ARL4G part is unused and in its original packaging.
Return procedure for 1N6277ARL4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6277ARL4G Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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