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Diodes Incorporated 1.5KE56CA-T
- Part No.:
- 1.5KE56CA-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE56CA-T.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:9,618
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Product details
Overview
1.5KE56CA-T from Diodes Incorporated is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, designed for high-energy surge protection on 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 1.5KE56CA-T datasheet, 1.5KE56CA-T pinout, 1.5KE56CA-T application, or 1.5KE56CA-T equivalent, this device is selected for robust overvoltage protection in automotive power systems, industrial I/O interfaces, and telecom line cards where fast response (<1ns), low leakage (<5μA @ 47.8V), and stable temperature coefficient (0.103%/°C) are critical.
Technical Context
This bidirectional TVS diode functions as a voltage-clamped shunt protector: under normal operation it presents high impedance (>1 GΩ), but triggers into low-impedance conduction when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures consistent avalanche behavior and long-term reliability under repetitive surge stress.
The device complies with IEC 61000-4-2 (ESD) and IEC 61000-4-5 (surge) immunity requirements. Its 1.0ms pulse width rating and 1500W peak power dissipation enable protection against lightning-induced surges and inductive switching transients in 48V and 24V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W - sustains single 1.0ms 8/20μs surge events without failure |
| Reverse Standoff Voltage | 47.8 V - maximum continuous DC or RMS voltage before leakage exceeds 5μA |
| Breakdown Voltage | 53.2–58.8 V @ 1mA - precise avalanche initiation range for predictable clamping onset |
| Clamping Voltage | 77.0 V @ 19.5A - limits downstream circuit voltage during worst-case surge |
| Leakage Current | <5 μA @ 47.8V - negligible standby power loss and minimal impact on high-impedance circuits |
| Operating Temperature | -55°C to +175°C - supports under-hood automotive and industrial environments |
| Temp. Coefficient | 0.103 %/°C - enables accurate voltage margining across wide thermal ranges |
Pinout & Package
Package: DO-201 axial-leaded package with transfer-molded epoxy body (UL 94V-0), tin-plated leads, and approximate weight of 1.12g. Marking consists of type number only (no cathode band) for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry (positive polarity) | Conducts during positive transients relative to cathode; symmetric with cathode for bidirectional operation |
| Cathode | Surge current entry (negative polarity) | Conducts during negative transients relative to anode; identical electrical behavior to anode in bidirectional mode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating DC lines without polarity constraints |
| Glass-passivated die | Ensures stable avalanche characteristics and long-term parameter consistency under thermal cycling |
| 1500W peak pulse rating | Supports IEC 61000-4-5 Level 4 (4kV line-to-line, 2kV line-to-ground) compliance |
| RoHS-compliant & halogen-free | Fulfills automotive and industrial environmental mandates without compromising surge performance |
| Fast response time | <1 ns turn-on enables protection of sensitive ICs before voltage overshoot damages gate oxides |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects microcontroller GPIO and CAN transceiver power pins from load-dump and jump-start transients in 12V/24V vehicle networks. IC Role / Device Role / Timing Role: Shunt clamping element placed between VCC and GND, triggered within nanoseconds to clamp spikes up to 120V. Use Value: Prevents latch-up and permanent damage to 5V/3.3V logic while maintaining AEC-Q101 qualification path via Diodes' IATF 16949 manufacturing. |
Use Scenario: Shields 24V digital input optocoupler front-end from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Primary overvoltage barrier on terminal block side, absorbing 1kV/0.5J transients per IEC 61000-4-5. Use Value: Eliminates need for multi-stage protection (MOV + TVS), reducing BOM count and PCB area while sustaining >100,000 surge cycles. |
| Telecom Base Station Power Supply | Smart Meter AC Mains Interface |
Use Scenario: Guards 48V intermediate bus rails against lightning-induced surges entering via outdoor Ethernet or RS-485 links. IC Role / Device Role / Timing Role: Secondary clamping stage after gas discharge tube (GDT), limiting let-through voltage to <80V. Use Value: Enables compact, high-reliability design meeting GR-1089-CORE Level 3 requirements without derating at elevated ambient temperatures. |
Use Scenario: Protects metering SoC power domain from fast-rising surges coupled through AC mains during grid switching events. IC Role / Device Role / Timing Role: Bidirectional shunt on isolated DC-DC converter input, clamping both line-to-neutral and line-to-ground transients. Use Value: Achieves EN 61000-4-4 (EFT) and EN 61000-4-5 compliance with single-component solution, reducing bill-of-materials cost by 35% vs. unidirectional pair. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58CA | 600W rating, SMB surface-mount package, lower clamping voltage (93.6V @ 6.4A) | Better suited for space-constrained PCBs; insufficient for 1.5kW-level lightning surges | Select when board real estate is limited and surge energy is ≤600W (IEC 61000-4-5 Level 2) |
| 1.5SMC58CA | Same 1500W rating, SMC package, higher thermal resistance (junction-to-ambient ≈ 100°C/W vs. DO-201's ≈ 50°C/W) | Requires larger copper pour for thermal management; less robust in high-temperature enclosures | Choose only if SMT assembly is mandatory and thermal derating is acceptable above 75°C ambient |
Compared with SMBJ58CA and 1.5SMC58CA, the 1.5KE56CA-T delivers superior thermal performance and surge endurance in through-hole designs, making it optimal for high-reliability industrial and automotive power rail protection where lead-frame heat sinking and mechanical robustness are prioritized.
Availability
1.5KE56CA-T is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and telecom power supply designs requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE56CA-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 manufacturing certified to IATF 16949 and quality systems aligned with AEC-Q200 standards.
The 1.5KE series is part of Diodes' transient voltage suppressor portfolio engineered specifically for high-energy surge immunity in automotive, industrial, and communications infrastructure applications.
FAQ
Is 1.5KE56CA-T RoHS and REACH compliant?
Yes, 1.5KE56CA-T meets EU Directive 2011/65/EU (RoHS 2) and 2015/863/EU (RoHS 3), including exemptions for high-temperature solder and glass. It is also halogen- and antimony-free, with bromine <900ppm, chlorine <900ppm, and antimony <1000ppm, satisfying "Green" device requirements per Diodes' specification DS21503 Rev. 12.
What is the maximum surge current 1.5KE56CA-T can withstand?
At 1.0ms pulse width, 1.5KE56CA-T handles up to 19.5A peak pulse current while clamping to 77.0V. This corresponds to 1500W peak power dissipation. Derating applies above +25°C ambient; at +75°C, maximum non-repetitive power drops to approximately 1125W per the datasheet's thermal derating curve.
Can 1.5KE56CA-T replace unidirectional 1.5KE56A-T in existing designs?
No - 1.5KE56CA-T is bidirectional (symmetrical clamping), whereas 1.5KE56A-T is unidirectional (cathode-banded, conducts only in reverse bias). Substitution requires verifying circuit polarity, grounding scheme, and whether AC-coupled or floating nodes exist; incorrect replacement may cause short-circuit or failed protection.
Does 1.5KE56CA-T meet AEC-Q101 qualification?
No - while manufactured in IATF 16949-certified facilities and suitable for automotive applications, the 1.5KE56CA-T itself is not AEC-Q101 qualified. Diodes offers AEC-Q101-qualified alternatives (e.g., P4SMAJ58CA-Q) for safety-critical automotive use cases requiring formal qualification documentation.
1.5KE56CA-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:
- -
- Bidirectional Channels:
- 1
- 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
1.5KE56CA-T FAQ
1.How can I place an order for 1.5KE56CA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE56CA-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 1.5KE56CA-T reliable?
The price and inventory of 1.5KE56CA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE56CA-T is usually 5 days.
3.What payment methods are accepted for 1.5KE56CA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE56CA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE56CA-T?
1.5KE56CA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE56CA-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 1.5KE56CA-T?
For technical support, including 1.5KE56CA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE56CA-T requirements.
6.How does Aetrix verify that 1.5KE56CA-T is sourced from the original manufacturer or authorized distributors?
All 1.5KE56CA-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 1.5KE56CA-T meets industry standards.
7.What is the process for return or replacement of 1.5KE56CA-T?
All 1.5KE56CA-T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE56CA-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 1.5KE56CA-T part is unused and in its original packaging.
Return procedure for 1.5KE56CA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE56CA-T 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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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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