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onsemi 1.5KE75A
- Part No.:
- 1.5KE75A
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1.5KE75A.pdf
- Description:
- TVS DIODE 64.1VWM 103VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,829
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Product details
Overview
1.5KE75A from ON Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics against ESD, lightning surges, and inductive switching transients. It features a 75 V breakdown voltage (VBR = 71.3–78.8 V @ IT = 1 mA), 103 V maximum clamping voltage (VC) at 14.6 A peak pulse current (IPP), and <1 ns response time - deployed in power supplies, industrial controls, and medical equipment input stages.
For engineers reviewing the 1.5KE75A datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, axial lead package details, UL 497B certification status, clamping performance under 1 ms surge, and validated alternative parts for circuit protection redesigns.
Technical Context
The 1.5KE75A operates as a silicon avalanche diode with unidirectional polarity, triggered when reverse voltage exceeds its specified VBR range. Its low dynamic impedance (<1 Ω typical above VBR) ensures rapid transition into low-impedance clamping mode during transients.
It complies with UL 497B for isolated loop circuit protection and meets Class 3 ESD immunity (>16 kV HBM). Thermal resistance is 20 °C/W (junction-to-lead), enabling stable operation up to +175 °C junction temperature with proper lead length (3/8″) and mounting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W @ 1 ms - sustains single high-energy surges without failure in AC/DC input protection. |
| Working Peak Reverse Voltage (VRWM) | 64.1 V - maximum continuous DC or peak AC voltage the device blocks before clamping activates. |
| Breakdown Voltage (VBR) | 71.3–78.8 V @ 1 mA - precise avalanche onset threshold defining protection trigger point. |
| Clamping Voltage (VC) | 103 V @ 14.6 A IPP - maximum voltage seen by protected circuit during worst-case surge. |
| Leakage Current (IR) | <5 µA @ 64.1 V - negligible standby power loss and signal integrity impact in high-impedance circuits. |
| Response Time | <1 ns - enables suppression of fast-rising transients before downstream ICs experience overstress. |
| ESD Rating | Class 3 (>16 kV HBM) - qualifies for robust handling in automated assembly and end-use environments. |
Pinout & Package
Axial lead Surmetic plastic package (Case 41A), Pb-free, cathode indicated by band. Leads are solderable at 260 °C for 10 s at 1/16″ from case. Mounting position unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or common return path; defines polarity for unidirectional clamping. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., DC input rail); carries full surge current during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Validated for isolated loop protection in telecom and industrial interfaces - reduces certification burden. |
| 1500 W Surge Rating | Handles IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges without degradation when properly mounted. |
| Low Clamping Ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on downstream regulators, controllers, and interface ICs. |
| Pb-Free Axial Package | Complies with RoHS and J-STD-020 reflow profiles - supports lead-free manufacturing without derating. |
| −65 °C to +175 °C Operating Range | Enables use in automotive engine compartments, industrial motor drives, and outdoor power systems. |
Applications
| Industrial Power Supply Input Protection | Medical Equipment ESD Shielding |
|---|---|
Use Scenario: 75 V DC input stage of a DIN-rail mounted PLC power module exposed to load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed across input terminals to shunt transient energy to ground. Use Value: Limits voltage to ≤103 V during 14.6 A surge, preventing damage to upstream rectifier and downstream DC/DC controller. |
Use Scenario: Patient-connected front-end analog signal path in portable ECG monitor subjected to hospital-grade ESD events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on isolated sensor supply rail, operating in conjunction with series current-limiting resistor. Use Value: Withstands >16 kV HBM discharges while adding <1 pF capacitance - preserving signal fidelity and diagnostic accuracy. |
| Telecom Line Interface Protection | Automotive Body Control Module (BCM) Inputs |
Use Scenario: 48 V PoE-powered network switch port with RS-485 control lines vulnerable to induced lightning surges. IC Role / Device Role / Timing Role: UL 497B-certified clamping device on isolated data/power pair, referenced to local ground plane. Use Value: Meets telecom surge immunity requirements (IEC 61000-4-5) without requiring additional isolation components. |
Use Scenario: 12 V battery-supplied input of BCM door lock actuator driver exposed to ISO 7637-2 pulse 1 and pulse 2a transients. IC Role / Device Role / Timing Role: Secondary protection device downstream of fuse and primary LC filter, absorbing residual energy. Use Value: Clamps transients to safe levels within 1 ns, protecting MOSFET gate drivers and microcontroller GPIO pins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75A | Surface-mount SMB package (3.5 × 4.5 mm), 600 W rating, same VRWM (64.1 V) and VC (103 V), but lower IPP (6.5 A). | Designed for PCB space-constrained designs; lacks axial lead mechanical robustness and UL 497B recognition. | Select SMBJ75A only when board area is critical and surge duty is less severe than 1.5KE75A's 1500 W capability. |
| 1.5SMC75A | Same 1500 W rating and VBR range, but SMC package (7.1 × 6.2 mm), higher thermal resistance (30 °C/W), no UL 497B listing. | Used in high-volume consumer power adapters where cost and automation dominate over safety certification. | Choose 1.5SMC75A for non-safety-critical, high-throughput production where axial lead handling is undesirable. |
Compared with SMBJ75A and 1.5SMC75A, the 1.5KE75A uniquely combines axial lead reliability, UL 497B compliance, and full 1500 W surge capacity - making it the preferred choice for industrial and medical systems requiring certified, high-energy protection.
Availability
1.5KE75A is available at Aetrix Electronics and suitable for industrial power supplies, medical instrumentation, telecom infrastructure, and automotive body electronics requiring stable component supply and long-term lifecycle support.
Supply support for 1.5KE75A 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 supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and medical markets.
The 1.5KE75A belongs to the Mosorb™ 1.5KE series - engineered specifically for high-reliability, high-power transient suppression in harsh environments where UL recognition and repeatable clamping performance are mandatory.
FAQ
What is the maximum clamping voltage of the 1.5KE75A under rated surge conditions?
The 1.5KE75A exhibits a maximum clamping voltage (VC) of 103 V when subjected to its rated peak pulse current of 14.6 A (IPP) with a 1 ms waveform per Figure 5 in the official datasheet. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during transient events. The 1.5KE75A maintains this clamping performance consistently across its qualified operating temperature range.
Is the 1.5KE75A certified for UL 497B, and what does that mean for system design?
Yes, the 1.5KE75A is UL 497B recognized (File #E210057) for isolated loop circuit protection - a requirement for many telecom, industrial, and medical safety standards. This certification confirms successful testing for strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge behavior. Using the 1.5KE75A simplifies system-level safety approvals because its qualification covers the protector category, not just flammability.
Can the 1.5KE75A be used in bidirectional protection configurations?
No, the 1.5KE75A is strictly unidirectional and must be installed with correct polarity (cathode to protected line, anode to ground). For bidirectional transient suppression, a dedicated bidirectional TVS such as 1.5KE75CA is required. Reversing the 1.5KE75A or pairing two units back-to-back introduces unpredictable leakage, inconsistent clamping, and potential failure under sustained reverse bias - the 1.5KE75A is not characterized or rated for such use.
What is the thermal resistance and steady-state power rating of the 1.5KE75A?
The 1.5KE75A 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″ lead length. Derating begins above 75°C at 20 mW/°C. These values assume proper lead soldering (260°C for 10 s at 1/16″ from case) and unrestricted mounting - critical for reliability in thermally demanding applications like motor drives or outdoor power systems.
How does the 1.5KE75A compare to the 1.5KE75CA in terms of circuit protection function?
The 1.5KE75A provides unidirectional clamping (anode-to-ground), while the 1.5KE75CA is bidirectional (symmetrical avalanche in both polarities). The 1.5KE75A offers lower leakage and tighter VBR tolerance for DC-biased lines; the 1.5KE75CA is used where AC signals or reversible polarity require protection in both directions. They are not interchangeable - selecting 1.5KE75A instead of 1.5KE75CA on an AC line risks catastrophic failure during negative half-cycles.
1.5KE75A 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):
- 64.1V
- Voltage - Breakdown (Min):
- 71.3V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 14.6A
- 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
1.5KE75A FAQ
1.How can I place an order for 1.5KE75A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE75A 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 1.5KE75A reliable?
The price and inventory of 1.5KE75A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE75A is usually 5 days.
3.What payment methods are accepted for 1.5KE75A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE75A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE75A?
1.5KE75A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE75A 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 1.5KE75A?
For technical support, including 1.5KE75A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE75A requirements.
6.How does Aetrix verify that 1.5KE75A is sourced from the original manufacturer or authorized distributors?
All 1.5KE75A 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 1.5KE75A meets industry standards.
7.What is the process for return or replacement of 1.5KE75A?
All 1.5KE75A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE75A, 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 1.5KE75A part is unused and in its original packaging.
Return procedure for 1.5KE75A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE75A Tags
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onsemi
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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