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onsemi 1.5KE56AG
- Part No.:
- 1.5KE56AG
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1.5KE56AG.pdf
- Description:
- TVS DIODE 47.8VWM 77VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,989
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Product details
Overview
1.5KE56AG from ON Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics. It features a 56 V breakdown voltage (VBR = 53.2–58.8 V @ IT = 1 mA), 77 V maximum clamping voltage (VC) at 19.5 A peak pulse current (IPP), and <1 ns response time - deployed in power supplies, industrial controls, and communication interfaces to absorb ESD and surge events.
For engineers reviewing the 1.5KE56AG datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, axial lead package details, UL 497B certification status, and validated alternative parts for circuit protection design-in and BOM continuity planning.
Technical Context
The 1.5KE56AG operates as a unidirectional Zener-based TVS diode with avalanche breakdown behavior, optimized for single-pulse transient suppression per IEC 61000-4-5 and MIL-STD-1275. Its low dynamic impedance (<1 Ω typical above VBR) ensures stable clamping under fast-rising transients up to 1500 W (1 ms pulse).
It is rated for −65 °C to +175 °C operating temperature, exhibits <5 µA leakage at VRWM = 47.8 V, and maintains ±0.103 %/°C VBR temperature coefficient - enabling reliable performance across wide thermal environments without derating penalties below 75 °C lead temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W @ 1 ms - absorbs high-energy surges without failure in AC/DC input stages |
| Working Peak Reverse Voltage (VRWM) | 47.8 V - sets minimum system DC bus or signal rail voltage threshold for safe operation |
| Breakdown Voltage (VBR) | 53.2–58.8 V @ 1 mA - defines precise avalanche onset point for predictable clamping initiation |
| Clamping Voltage (VC) | 77 V @ 19.5 A IPP - limits protected circuit voltage to safe level during worst-case transient |
| Response Time | <1 ns - reacts before most microsecond-scale transients fully develop |
| ESD Rating | Class 3 (>16 kV HBM) - withstands human-body-model electrostatic discharge events |
| UL Recognition | UL 497B certified (QVGQ2, File #E210057) - approved for isolated loop circuit protection |
Pinout & Package
1.5KE56AG uses an axial-leaded Surmetic plastic package (Case 41A), with cathode indicated by a polarity band on the body. Leads are tin-plated copper, solderable at 260 °C for 10 seconds at 1/16 inch from case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or low-side reference in unidirectional clamp configuration |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line (e.g., DC input, data line) - polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse rating | Enables robust protection against lightning-induced surges (IEC 61000-4-5 Level 4) on 48 V systems |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices |
| UL 497B recognition | Validates suitability for telecom and industrial isolated loop applications requiring safety agency approval |
| Pb-free axial package (RoHS compliant) | Meets global environmental compliance requirements without lead content or solderability trade-offs |
Applications
| Industrial Power Supply Input Protection | RS-485 Data Line Surge Suppression |
|---|---|
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 clamping element placed directly across input terminals, conducting only during overvoltage events. Use Value: Limits input voltage to ≤77 V during 19.5 A surge, preventing damage to upstream rectifier and downstream DC-DC converter. | Use Scenario: Differential pair of RS-485 transceiver (e.g., MAX1487) in factory automation network subject to ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional protection not required; 1.5KE56AG used on common-mode line relative to ground to suppress common-mode surges. Use Value: Clamps common-mode transients within 1 ns while maintaining <5 µA leakage at 47.8 V, preserving signal integrity and receiver sensitivity. |
| Medical Equipment AC/DC Adapter Interface | Automotive Aftermarket Diagnostic Port Protection |
Use Scenario: Secondary-side output of medical-grade AC/DC adapter powering patient monitoring device with strict low-leakage requirements. IC Role / Device Role / Timing Role: Final-stage overvoltage guard on regulated 48 V output rail, guarding against internal regulator fault or capacitor failure. Use Value: Provides Class 3 ESD immunity and UL 497B-compliant isolation barrier, meeting IEC 60601-1 creepage/clearance support requirements. | Use Scenario: OBD-II diagnostic port in vehicle service tool subjected to battery jump-start transients and alternator load dump coupling. IC Role / Device Role / Timing Role: Clamp device installed between VBAT line and chassis ground, absorbing 12 V system-level surges up to 1500 W. Use Value: Withstands 200 A non-repetitive forward surge (IFSM), ensuring survival during accidental reverse battery connection or jump-start scenarios. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58A | Surface-mount SMB package (vs. axial); lower 600 W rating; 58 V VBR nominal; 93.6 V VC @ 6.4 A | Requires PCB redesign; suited for space-constrained consumer electronics, not high-surge industrial inputs | Select when board space is limited and peak surge energy is ≤600 W |
| 1.5KE56A | Same axial package and electrical specs; lacks Pb-free designation (SnPb leads) | No functional difference; not RoHS-compliant; restricted in EU/China markets | Select only for legacy repair or non-RoHS exempt applications |
Compared with SMBJ58A and 1.5KE56A, the 1.5KE56AG delivers identical surge handling in a RoHS-compliant axial form factor - making it optimal for industrial power entry designs requiring UL 497B certification, high-reliability through-hole assembly, and full regulatory compliance without layout change.
Availability
1.5KE56AG is available at Aetrix Electronics and suitable for industrial power supply input protection, RS-485 interface hardening, medical equipment adapter outputs, and automotive diagnostic port surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for 1.5KE56AG 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 supplier delivering energy-efficient, high-performance silicon solutions for automotive, industrial, cloud, and communications markets.
The 1.5KE56AG belongs to the 1.5KE Series Mosorb TVS family - engineered specifically for high-power, unidirectional transient suppression in harsh industrial and telecom environments where reliability, UL certification, and axial mounting are critical.
FAQ
What is the clamping voltage of the 1.5KE56AG and how is it measured?
The 1.5KE56AG has a maximum clamping voltage (VC) of 77 V, measured at a peak pulse current (IPP) of 19.5 A using the standard 1 ms exponential waveform defined in Figure 5 of the datasheet. This value represents the upper voltage limit imposed on the protected circuit during worst-case transient events, ensuring downstream components remain within safe operating voltage ranges.
Is the 1.5KE56AG RoHS compliant and what does the "G" suffix indicate?
Yes, the 1.5KE56AG is RoHS compliant. The "G" suffix explicitly denotes a Pb-free package per ON Semiconductor's specification - confirmed by its Surmetic axial lead construction with tin-plated leads and exemption from lead content restrictions under Directive 2011/65/EU Annex II. This enables use in environmentally regulated markets without compliance risk.
Does the 1.5KE56AG meet UL 497B requirements and for which applications is that certification valid?
Yes, the 1.5KE56AG is UL 497B recognized (File #E210057, Category QVGQ2) for isolated loop circuit protection. This certification validates its use in telecom interfaces, industrial fieldbus networks, and medical signal isolation barriers where safety-agency-approved transient suppression is mandated - covering tests including strike voltage breakdown, endurance conditioning, and dielectric withstand.
What is the maximum working peak reverse voltage (VRWM) for the 1.5KE56AG and why is it important for circuit design?
The 1.5KE56AG has a VRWM of 47.8 V - the highest continuous DC or peak AC voltage the device can block without entering breakdown. Selecting a VRWM ≥ system operating voltage prevents false triggering during normal operation, while maintaining sufficient margin (e.g., ≥10–15%) avoids thermal runaway due to leakage current rise near VBR.
Can the 1.5KE56AG be used in bidirectional protection circuits?
No, the 1.5KE56AG is strictly unidirectional. Its internal structure supports clamping only in reverse bias (cathode positive), with forward conduction limited to 3.5 V at 100 A. For bidirectional protection - such as AC line or differential data lines - a dedicated bidirectional TVS like 1.5KE56CA or SMAJ58A must be used instead.
1.5KE56AG 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):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 19.5A
- 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
1.5KE56AG FAQ
1.How can I place an order for 1.5KE56AG through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE56AG 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 1.5KE56AG reliable?
The price and inventory of 1.5KE56AG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE56AG is usually 5 days.
3.What payment methods are accepted for 1.5KE56AG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE56AG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE56AG?
1.5KE56AG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE56AG 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 1.5KE56AG?
For technical support, including 1.5KE56AG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE56AG requirements.
6.How does Aetrix verify that 1.5KE56AG is sourced from the original manufacturer or authorized distributors?
All 1.5KE56AG 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 1.5KE56AG meets industry standards.
7.What is the process for return or replacement of 1.5KE56AG?
All 1.5KE56AG units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE56AG, 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 1.5KE56AG part is unused and in its original packaging.
Return procedure for 1.5KE56AG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE56AG Tags
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