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Diodes Incorporated 1.5KE56A-T
- Part No.:
- 1.5KE56A-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE56A-T.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:9,751
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Product details
Overview
1.5KE56A-T from Diodes Incorporated is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, designed for primary overvoltage protection of DC power rails and signal lines. It features a 47.8V reverse standoff voltage, 53.2V minimum breakdown voltage at 1mA, 77.0V maximum clamping voltage at 19.5A peak pulse current, and operates across –55°C to +175°C.
For engineers reviewing the 1.5KE56A-T datasheet, 1.5KE56A-T pinout, 1.5KE56A-T application, or 1.5KE56A-T equivalent, key selection criteria include clamping voltage margin relative to protected IC VMAX, peak pulse current capability under IEC 61000-4-5 surge waveforms, thermal derating above +25°C, and axial lead solderability per MIL-STD-202 Method 208.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1.0 ps) and stable breakdown characteristics. Its DO-201 axial package enables high-power dissipation (1500W peak, 5.0W steady-state at 75°C lead temperature) with low thermal resistance to ambient via axial leads.
The device exhibits a voltage temperature coefficient of +0.103%/°C, enabling predictable clamping behavior across industrial temperature ranges. Reverse leakage remains ≤5.0 µA at 47.8V standoff, ensuring minimal standby power loss in battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W - Withstands 1.0 ms 8/20 µs surge pulses without degradation |
| Reverse Standoff Voltage (VRWM) | 47.8 V - Maximum continuous DC voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 53.2 V min @ 1.0 mA - Confirmed avalanche initiation threshold for reliable triggering |
| Clamping Voltage (VC) | 77.0 V max @ 19.5 A - Limits transient voltage seen by downstream circuitry during surge events |
| Operating Temperature | –55°C to +175°C - Supports under-hood automotive, industrial motor drives, and outdoor power supply designs |
| Leakage Current (IR) | ≤5.0 µA @ 47.8 V - Ensures negligible quiescent current draw in always-on systems |
| Package | DO-201 - Axial-leaded, transfer-molded epoxy housing rated UL 94V-0, 1.12 g mass |
Pinout & Package
DO-201 package: axial-lead, glass-passivated silicon die in flame-retardant epoxy body. Cathode indicated by band on body; anode and cathode terminals are non-polarized except for unidirectional conduction path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Current entry terminal in forward bias; connected to system ground or low-side reference | Provides return path for surge current during clamping; must be routed with low-inductance trace to ground plane |
| Cathode (Lead 2) | Current exit terminal in forward bias; connected to protected line or rail | Acts as high-impedance node until VRWM exceeded; defines polarity-sensitive placement on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Enables stable, repeatable avalanche performance and long-term reliability under repeated surge stress |
| 1500W peak pulse rating (tP = 1.0 ms) | Meets IEC 61000-4-5 Level 4 (4 kV) surge immunity requirements for AC mains and telecom interfaces |
| RoHS-compliant, halogen- and antimony-free | Complies with EU Directive 2015/863/EU; supports green manufacturing and end-of-life recycling mandates |
| Moisture sensitivity level 1 | Eliminates need for dry-packaging or bake-out prior to SMT reflow-though axial leads require manual or wave soldering |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Line Protection |
|---|---|
Use Scenario: 24V DC input stage of DIN-rail mounted PLC power supply exposed to load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Primary clamping element placed between +24V rail and chassis ground, triggered within picoseconds of overvoltage onset. Use Value: Clamps 100V+ transients to ≤77V, protecting downstream DC-DC controllers and microcontrollers rated for 36V absolute maximum. |
Use Scenario: CAN_H and CAN_L lines in BCM subjected to ESD (IEC 61000-4-2 ±8 kV contact) and coupled surges. IC Role / Device Role / Timing Role: Unidirectional TVS on each line referenced to ground, providing low-capacitance (<100 pF), low-leakage protection without distorting 1 Mbps CAN signaling. Use Value: Maintains signal integrity while limiting voltage excursions to <±15V during ESD events, preventing transceiver latch-up. |
| AC-DC Adapter Secondary-Side Output Protection | Telecom DSL Line Interface Surge Suppression |
Use Scenario: 12V/5V output rails of wall-mounted AC-DC adapters used in smart home gateways. IC Role / Device Role / Timing Role: Final-stage TVS placed immediately after secondary-side rectifier and filter capacitor, guarding against output short-circuit recovery spikes. Use Value: Absorbs 1500W energy bursts without failure, preserving output regulation and avoiding nuisance shutdowns during transient overload. |
Use Scenario: Front-end protection of ADSL/VDSL line interface ICs connected to outside plant wiring. IC Role / Device Role / Timing Role: Series-connected unidirectional TVS on tip/ring lines, coordinated with gas discharge tube (GDT) primary protection. Use Value: Provides precise clamping (77.0V) to protect low-voltage analog front-end components while allowing GDT to handle bulk energy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58A (Diodes Inc.) | Same 58V nominal breakdown but SMB package (surface-mount); 600W peak power; lower IPP (10.1A) | Requires PCB real estate optimization; unsuitable for high-current (>15A) surge paths due to lower PPK | Select when board space is constrained and surge threat level is IEC 61000-4-5 Level 2–3 only. |
| 1N6277A (ON Semiconductor) | Identical DO-201 package and 1500W rating; VRWM = 47.8V, VC = 77.0V, but higher leakage (≤10 µA @ VRWM) | Acceptable where leakage budget allows extra 5 µA; same thermal and mechanical mounting | Choose when cross-qualifying for second-source procurement with identical form-fit-function and legacy design reuse. |
Compared with SMBJ58A, 1.5KE56A-T delivers 95% higher peak current handling in axial format; versus 1N6277A, it offers tighter leakage control critical for low-power always-on nodes-making it optimal for high-reliability industrial and automotive front-end protection.
Availability
1.5KE56A-T is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom line interfaces, and AC-DC adapter designs requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE56A-T 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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal devices, with design centers across Asia, Europe, and the US.
The 1.5KE series targets high-energy transient suppression in harsh environments, emphasizing robustness, wide temperature operation, and compliance with automotive and industrial safety standards.
FAQ
What is the difference between 1.5KE56A and 1.5KE56CA?
The "A" suffix denotes unidirectional operation (anode-cathode polarity), while "CA" indicates bidirectional configuration (symmetrical clamping for AC signals). 1.5KE56A-T is unidirectional, with cathode marked by a band; it conducts only when cathode voltage exceeds anode by >53.2V. Bidirectional variants lack polarity marking and clamp equally on both polarities.
Can 1.5KE56A-T be used in place of a Zener diode for voltage regulation?
No-it is not designed for continuous regulation. While it exhibits controlled avalanche behavior, its parameters (e.g., 5.0W steady-state power, wide VBR tolerance ±5%) and thermal profile make it unsuitable for precision voltage reference or linear regulation. It functions exclusively as a transient shunt protector, not a DC voltage source.
Is 1.5KE56A-T compliant with AEC-Q200 for automotive use?
No-this part is not AEC-Q200 qualified. Though manufactured in IATF 16949-certified facilities and RoHS-compliant, Diodes explicitly states that AEC-Q200 qualification requires specific change control and PPAP submission. For automotive-grade TVS, consult Diodes' Automotive Qualified (AQ) series such as AQ1525-01UTG.
How does the DO-201 package affect thermal performance compared to SMC or SMA packages?
The DO-201's axial leads provide superior thermal conduction to external heatsinks or copper pours via through-hole mounting, achieving lower junction-to-ambient resistance than surface-mount equivalents. At 75°C lead temperature, it sustains 5.0W continuously-~30% higher than SMBJ58A (SMC package) under identical conditions-making it preferred for high-power, manually assembled protection stages.
1.5KE56A-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE56A-T FAQ
1.How can I place an order for 1.5KE56A-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE56A-T 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 1.5KE56A-T reliable?
The price and inventory of 1.5KE56A-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE56A-T is usually 5 days.
3.What payment methods are accepted for 1.5KE56A-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE56A-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE56A-T?
1.5KE56A-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE56A-T 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 1.5KE56A-T?
For technical support, including 1.5KE56A-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE56A-T requirements.
6.How does Aetrix verify that 1.5KE56A-T is sourced from the original manufacturer or authorized distributors?
All 1.5KE56A-T 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 1.5KE56A-T meets industry standards.
7.What is the process for return or replacement of 1.5KE56A-T?
All 1.5KE56A-T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE56A-T, 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 1.5KE56A-T part is unused and in its original packaging.
Return procedure for 1.5KE56A-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE56A-T Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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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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Diodes Incorporated
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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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Diodes Incorporated
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