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onsemi 1N6295A
- Part No.:
- 1N6295A
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1N6295A.pdf
- Description:
- TVS DIODE 85.5VWM 137VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,869
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Product details
Overview
1N6295A 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 working peak reverse voltage (VRWM) of 85.5 V, clamping voltage (VC) of 137 V at 11 A peak pulse current (IPP), and sub-1 ns response time. It is used in industrial power supplies, communication interfaces, and medical equipment input stages to safeguard CMOS/MOS/Bipolar ICs.
For engineers reviewing the 1N6295A datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ system DC bus voltage, VC margin relative to protected device absolute maximum ratings, surge capability under 1 ms 8.3 ms half-sine waveform, and UL 497B recognition for isolated loop circuit protection.
Technical Context
The 1N6295A operates as a Zener-based avalanche clamp, triggered when reverse voltage exceeds its 100 V breakdown voltage (VBR) at 1 mA test current. Its low dynamic impedance ensures stable clamping during 1500 W, 1 ms non-repetitive surges, with thermal resistance (RJL) of 20 °C/W enabling effective junction-to-lead heat dissipation.
It exhibits <5 µA leakage above 10 V, ESD robustness >16 kV per Human Body Model, and is packaged in Surmetic axial leaded Case 41A plastic with cathode band polarity marking. Mounting position is unrestricted, and soldering is rated to 230 °C for 10 seconds at 1/16 inch from case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W @ 1 ms - sustains single high-energy transients without failure |
| Working Peak Reverse Voltage (VRWM) | 85.5 V - maximum continuous reverse voltage before clamping initiates |
| Clamping Voltage (VC) | 137 V @ 11 A IPP - maximum voltage seen by protected circuit during surge |
| Breakdown Voltage (VBR) | 100 V min / 105 V max @ 1 mA - precise Zener threshold defining turn-on point |
| Response Time | <1 ns - enables suppression before transient propagates into downstream ICs |
| Leakage Current | <5 µA @ VRWM - negligible standby power loss and signal integrity impact |
| UL Recognition | UL 497B (QVGV2) - certified for isolated loop circuit protection in safety-critical systems |
Pinout & Package
1N6295A is housed in an axial-leaded Surmetic plastic package (Case 41A), with cathode identified by a colored band. Leads are corrosion-resistant, readily solderable, and rated for 230 °C for 10 seconds at 1/16 inch from case. Mounting orientation is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased reference terminal | Connected to system ground or low-side return path in parallel protection configuration |
| Cathode | Zener clamping node | Connected to protected line (e.g., DC input, data line) - clamps to anode when overvoltage occurs |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse rating | Handles IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without degradation |
| UL 497B certification | Validated for use in telecom and industrial isolated loop protection circuits per safety standard |
| ESD rating >16 kV HBM | Withstands electrostatic discharge events common in handling and board assembly |
| Low zener impedance | Ensures tight VC tolerance across production lot and temperature range |
| Pb-free external lead finish | Complies with RoHS Directive 2011/65/EU without compromising solderability or reliability |
Applications
| Industrial Power Supply Input Protection | RS-485 Communication Line Clamping |
|---|---|
Use Scenario: 48 V DC input stage of programmable logic controller (PLC) exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between +48 V rail and chassis ground to clamp positive-going surges. Use Value: Limits voltage to ≤137 V during 1500 W transients, preventing damage to upstream DC-DC controllers and downstream microcontrollers. |
Use Scenario: Differential pair of RS-485 transceivers in factory automation network subject to cable ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Two 1N6295A devices (one per line) referenced to local ground to clamp common-mode overvoltage on A/B lines. Use Value: Maintains signal integrity by suppressing transients within <1 ns while adding <5 µA leakage-no impact on bus bias or termination. |
| Medical Equipment AC/DC Adapter Interface | Process Control Sensor Signal Conditioning Input |
Use Scenario: Secondary-side output of isolated AC/DC adapter powering patient-monitoring front-end analog circuitry. IC Role / Device Role / Timing Role: Clamp device on 24 V output rail to protect precision ADCs and op-amps from secondary-side surge coupling. Use Value: UL 497B recognition validates safe use in medically isolated circuits; 137 V clamping preserves 20 V absolute max rating margins of signal-chain ICs. |
Use Scenario: 4–20 mA current loop input of distributed control system (DCS) I/O module connected to field pressure sensors. IC Role / Device Role / Timing Role: TVS placed across loop terminals to absorb induced surges from nearby motor drives or lightning. Use Value: 85.5 V VRWM matches typical loop compliance voltage; low leakage avoids perturbing 4–20 mA accuracy or loop power budget. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ85A | Same VRWM (85.5 V), lower PPK (400 W), SMC package (surface-mount) | Requires PCB rework for SMT layout; unsuitable for through-hole legacy designs | Select when board space is constrained and surge energy is ≤400 W |
| Vishay 1.5KE85A | Identical electrical specs and Case 41A package; same JEDEC 1N6295A cross-reference | No functional or mechanical difference; direct second-source option | Preferred for supply chain diversification without design change |
Compared with Littelfuse SMAJ85A, the 1N6295A delivers 3.75× higher surge energy handling in axial-leaded form; versus Vishay 1.5KE85A, it offers identical performance with ON Semiconductor's UL 497B certification and Pb-free lead finish assurance.
Availability
1N6295A is available at Aetrix Electronics and suitable for industrial power supplies, RS-485 networks, and medical equipment requiring stable component supply with full regulatory documentation and traceable sourcing.
Supply support for 1N6295A 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 part of onsemi) is a global semiconductor manufacturer specializing in power management, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT applications.
The 1N6295A belongs to the 1N6267A Series Mosorb TVS family, engineered for cost-effective, high-reliability transient protection in harsh industrial and communications environments where UL recognition and surge robustness are mandatory.
FAQ
What is the clamping voltage of the 1N6295A under maximum surge conditions?
The 1N6295A has a maximum clamping voltage (VC) of 137 V when subjected to its rated peak pulse current (IPP) of 11 A, measured using the standardized 1 ms exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during transient events and is critical for ensuring downstream ICs remain within their absolute maximum ratings. The 1N6295A maintains this clamping performance across its specified operating temperature range and lifetime.
Is the 1N6295A suitable for bidirectional transient protection?
No, the 1N6295A is a unidirectional TVS diode and only protects against positive-going transients on the cathode side relative to the anode. For bidirectional protection (e.g., AC lines or differential data buses), a dedicated bidirectional device such as 1.5KE85CA must be used. Using two 1N6295A devices in series opposing configuration is not recommended due to mismatched VBR tolerances and undefined behavior under negative surges.
Does the 1N6295A meet UL safety standards for industrial isolation?
Yes, the 1N6295A carries UL 497B recognition (File #116110, Category QVGV2) specifically for isolated loop circuit protection. This certification confirms successful completion of strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge testing-validating its suitability in safety-critical industrial and medical applications where galvanic isolation integrity must be maintained during surge events.
What is the thermal resistance specification for the 1N6295A, and how does it affect layout?
The 1N6295A has a junction-to-lead thermal resistance (RJL) of 20 °C/W, meaning each watt of steady-state power dissipation raises the junction temperature 20 °C above lead temperature. Since its steady-state power rating is only 5.0 W at TL = 75 °C, layout must prioritize short, wide traces to the leads and avoid thermal bottlenecks-especially important if the device experiences repeated lower-energy surges that accumulate average power. Derating applies above 75 °C lead temperature.
Can the 1N6295A replace older 1N6295 devices without design changes?
Yes, the 1N6295A is the enhanced, Pb-free successor to legacy 1N6295 devices and maintains identical electrical specifications, package dimensions (Case 41A), pinout, and mounting requirements. It introduces RoHS-compliant external lead finish and updated UL 497B certification while preserving full drop-in compatibility-no PCB, schematic, or firmware modifications are required when upgrading from obsolete 1N6295 versions.
1N6295A 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):
- 85.5V
- Voltage - Breakdown (Min):
- 95V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- 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
1N6295A FAQ
1.How can I place an order for 1N6295A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6295A 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 1N6295A reliable?
The price and inventory of 1N6295A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6295A is usually 5 days.
3.What payment methods are accepted for 1N6295A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6295A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6295A?
1N6295A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6295A 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 1N6295A?
For technical support, including 1N6295A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6295A requirements.
6.How does Aetrix verify that 1N6295A is sourced from the original manufacturer or authorized distributors?
All 1N6295A 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 1N6295A meets industry standards.
7.What is the process for return or replacement of 1N6295A?
All 1N6295A units undergo pre-shipment inspection (PSI). If there is an issue with 1N6295A, 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 1N6295A part is unused and in its original packaging.
Return procedure for 1N6295A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6295A 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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ESD5Z5.0T1G
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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