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onsemi 1N6284A
- Part No.:
- 1N6284A
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1N6284A.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,010
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Product details
Overview
1N6284A from ON Semiconductor is a unidirectional 1500 W Mosorb transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics against high-energy transients. It features a 30.8 V working peak reverse voltage (VRWM), 36 V breakdown voltage (VBR) at 1 mA, and clamps to 49.9 V at 30 A peak pulse current - used in power supply input stages, industrial I/O interfaces, and telecom line protection.
For engineers reviewing the 1N6284A datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to system operating voltage, surge current handling under 1 ms pulses, UL 497B recognition for isolated loop circuits, and axial leaded Surmetic package compatibility with through-hole PCB assembly.
Technical Context
The 1N6284A operates as a unidirectional Zener-based TVS diode, entering avalanche conduction when reverse voltage exceeds its 36 V nominal breakdown threshold. Its low dynamic impedance and sub-1 ns response time enable rapid clamping of ESD and lightning-induced surges before downstream ICs are damaged.
It is rated for 1500 W nonrepetitive peak pulse power (1 ms, 10/1000 µs waveform), with thermal resistance of 20 °C/W (junction-to-lead) and steady-state power dissipation of 5.0 W at TL ≤ 75 °C. The device meets Class 3 ESD immunity (>16 kV HBM) and is UL 497B recognized for isolated loop circuit protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Peak Reverse Voltage (VRWM) | 30.8 V - maximum continuous DC or peak AC voltage the device blocks without clamping; sets minimum system operating margin. |
| Breakdown Voltage (VBR) | 36 V @ 1 mA - precise avalanche initiation point; ensures predictable turn-on during overvoltage events. |
| Clamping Voltage (VC) | 49.9 V @ 30 A - maximum voltage seen by protected circuit during full-rated surge; defines safe operating window for 3.3 V/5 V/12 V systems. |
| Peak Pulse Power (PPK) | 1500 W @ 1 ms - energy-handling capacity for transient suppression; validated per Figure 5 waveform (10/1000 µs). |
| Leakage Current (IR) | <5 µA @ 30.8 V - negligible standby power loss and signal integrity impact in always-on protection circuits. |
| Response Time | <1 ns - enables suppression before fast-rising transients (e.g., ESD, relay bounce) propagate into IC inputs. |
| ESD Rating | Class 3 (>16 kV HBM) - exceeds IEC 61000-4-2 Level 4 requirements for robust board-level ESD immunity. |
Pinout & Package
Package: Axial-leaded Surmetic plastic case (JEDEC Case 41A), void-free transfer-molded thermosetting material; cathode indicated by polarity band; leads solderable at 230 °C for 10 s at 1/16″ from case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side reference | Connected to ground or common return path in unidirectional clamp configuration. |
| Cathode | Avalanche conduction terminal / high-side input | Connected to protected line (e.g., DC input, signal trace); carries full surge current during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Validated for isolated loop circuit protection - enables compliance in telecom, process control, and medical equipment without additional certification effort. |
| Low Clamping Ratio (VC/VBR) | 1.39 - tight voltage margin between breakdown and clamping ensures minimal overvoltage stress on downstream components. |
| Pb-Free Lead Finish | RoHS-compliant termination - supports lead-free reflow and wave soldering processes without reliability degradation. |
| High Surge Robustness | Withstands 200 A forward surge (8.3 ms half-sine) - protects against inrush and fault currents in power rail applications. |
Applications
| Industrial Power Supply Input Protection | Telecom Line Interface Protection |
|---|---|
Use Scenario: DC input stage of programmable logic controller (PLC) power module exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional parallel TVS clamp placed across +24 V rail and chassis ground. Use Value: Limits transient excursions to ≤49.9 V, protecting upstream DC/DC converters and downstream microcontrollers rated for 36 V absolute maximum. |
Use Scenario: RS-485 data lines in outdoor base station equipment subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary protection device on differential pair, mounted at connector entry point. Use Value: Sub-1 ns response and 1500 W rating suppress multi-kV transients before they couple into isolated transceivers, preserving signal integrity and isolation barrier integrity. |
| Medical Equipment Mains-Side Surge Protection | Automotive Body Control Module (BCM) I/O Protection |
Use Scenario: Secondary-side DC bus in patient-monitoring device powered from isolated AC/DC adapter. IC Role / Device Role / Timing Role: Standby clamping element across 12 V distribution rail feeding analog front-end and ADC reference. Use Value: UL 497B recognition validates use in safety-critical isolated loops; low leakage (<5 µA) avoids drift in precision sensor bias networks. |
Use Scenario: LIN bus or switch input protection in BCM exposed to battery disconnect transients and ISO 7637-2 pulse 1/2a. IC Role / Device Role / Timing Role: Unidirectional TVS on each switched input, referenced to vehicle ground. Use Value: 30.8 V VRWM matches 12 V automotive nominal; 49.9 V clamping prevents latch-up in 5 V logic inputs during load dump events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | Surface-mount SMB package; 36 V VRWM; 58.1 V clamping @ 25.1 A; lower 600 W peak power rating. | Requires PCB redesign for SMT layout; suited for space-constrained consumer electronics rather than industrial through-hole assemblies. | Select when board area is constrained and surge requirements are ≤600 W; not drop-in for axial-leaded 1N6284A footprints. |
| 1.5KE36A | Same die and electrical specs as 1N6284A; identical VRWM (30.8 V), VBR (36 V), VC (49.9 V), and PPK (1500 W); alternate ON Semiconductor part number for same device. | No functional or application difference - dual-marking variant used interchangeably in BOMs and procurement. | Direct form-fit-function replacement; identical performance and qualification; preferred for new designs per ON Semiconductor's Preferred Devices list. |
Compared with SMBJ36A, the 1N6284A offers higher surge robustness and through-hole mechanical stability for industrial environments; compared with 1.5KE36A, it is electrically identical but uses JEDEC-standardized marking - both are valid for legacy or new designs depending on sourcing preference.
Availability
1N6284A is available at Aetrix Electronics and suitable for industrial power supplies, telecom infrastructure equipment, and medical instrumentation requiring stable component supply with long-term lifecycle support and traceable sourcing.
Supply support for 1N6284A 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, sensing, and connectivity solutions for automotive, industrial, cloud, and medical markets.
The 1N6284A belongs to the 1N6267A Series of Mosorb transient voltage suppressors - engineered for high-reliability, high-energy clamping in harsh electromagnetic environments where robust surge immunity is mission-critical.
FAQ
What is the clamping voltage of the 1N6284A and how does it protect downstream circuits?
The 1N6284A clamps to 49.9 V at 30 A peak pulse current. This means that during a transient event - such as an ESD strike or inductive load switch-off - the voltage across the protected line will not exceed 49.9 V, regardless of surge amplitude, as long as the pulse conforms to the 1 ms rating. This limits stress on downstream components like microcontrollers, transceivers, or regulators whose absolute maximum ratings are typically 36 V or less, preventing permanent damage or latch-up. The 1N6284A achieves this via controlled avalanche breakdown in its silicon junction.
Is the 1N6284A RoHS compliant and compatible with lead-free soldering processes?
Yes, the 1N6284A features a Pb-free external lead finish and is fully RoHS compliant. It is qualified for lead-free soldering with a maximum lead temperature of 230 °C for 10 seconds at 1/16 inch from the case - matching standard IPC/JEDEC J-STD-020 reflow profiles. The Surmetic axial package maintains mechanical integrity and solder wettability under these conditions, ensuring reliable through-hole assembly without tin whisker risk or intermetallic degradation.
How does the 1N6284A differ from bidirectional TVS diodes like 1.5KE36CA?
The 1N6284A is unidirectional and functions only during reverse-biased overvoltage events - it blocks forward current like a standard diode while clamping reverse transients. In contrast, 1.5KE36CA is bidirectional and clamps transients of either polarity, making it suitable for AC lines or differential signals. The 1N6284A's unidirectional design provides lower leakage (<5 µA at VRWM) and tighter clamping ratio (VC/VBR = 1.39) than its bidirectional counterpart, which trades off some precision for symmetrical protection. Use 1N6284A where polarity is known and DC rail protection is needed.
Does the 1N6284A require a series impedance for proper operation, and if so, what value is recommended?
Yes, a series impedance (typically a resistor or ferrite bead) is essential to limit peak current through the 1N6284A during clamping and prevent thermal runaway. While no single value fits all cases, a 1–10 Ω resistor is commonly used for 24 V industrial rails, and 10–100 Ω for 5 V/3.3 V logic lines - selected to ensure the 1N6284A sees current within its 30 A rated IPP while keeping voltage drop across the resistor acceptable during normal operation. The exact value must be validated using worst-case surge models and thermal simulations for the target application.
What certifications does the 1N6284A hold, and why do they matter for system-level compliance?
The 1N6284A is UL 497B recognized (File #116110, QVGV2 category) for isolated loop circuit protection - a critical requirement for telecom, process control, and medical devices where galvanic isolation must survive surge events. Unlike basic flammability-only certifications, UL 497B validates performance under strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge testing. This allows designers to leverage the 1N6284A's qualification in end-equipment safety filings, reducing validation burden and accelerating time-to-market for certified systems.
1N6284A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-201AD, Axial
- Series:
- Mosorb™
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30.8V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 49.9V
- 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
1N6284A FAQ
1.How can I place an order for 1N6284A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6284A 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 1N6284A reliable?
The price and inventory of 1N6284A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6284A is usually 5 days.
3.What payment methods are accepted for 1N6284A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6284A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6284A?
1N6284A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6284A 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 1N6284A?
For technical support, including 1N6284A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6284A requirements.
6.How does Aetrix verify that 1N6284A is sourced from the original manufacturer or authorized distributors?
All 1N6284A 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 1N6284A meets industry standards.
7.What is the process for return or replacement of 1N6284A?
All 1N6284A units undergo pre-shipment inspection (PSI). If there is an issue with 1N6284A, 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 1N6284A part is unused and in its original packaging.
Return procedure for 1N6284A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6284A 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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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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