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STMicroelectronics 1.5KE56CARL
- Part No.:
- 1.5KE56CARL
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE56CARL.pdf
- Description:
- TVS DIODE 47.8VWM 100VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:5,341
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Product details
Overview
1.5KE56CARL from STMicroelectronics is a unidirectional 1500 W transient voltage suppression diode in DO-201 package, designed for IEC 61000-4-2 ESD protection (30 kV air/contact) and IEC 61000-4-4 surge immunity (4 kV level 4). It features 56 V breakdown voltage (VBR = 53.2–58.8 V), 77 V clamping voltage (VCL) at 19.5 A peak pulse current, and operates up to 175 °C junction temperature. It is used in AC/DC power supplies and industrial control inputs requiring robust overvoltage clamping.
For engineers reviewing the 1.5KE56CARL datasheet, 1.5KE56CARL pinout, 1.5KE56CARL application, or 1.5KE56CARL equivalent, this page delivers verified electrical parameters, DO-201 terminal mapping, real-world clamping behavior under 10/1000 µs surges, thermal derating curves, and validated alternatives for high-reliability power rail protection.
Technical Context
This TVS diode uses planar junction technology to achieve low leakage (<1 µA at 47.8 V), stable VBR temperature coefficient (αT = 10.3 × 10−4/°C), and repeatable clamping performance across −55 °C to +175 °C. Its unidirectional configuration enables asymmetric surge handling on DC rails with defined anode/cathode polarity.
The device meets IEC 61000-4-2 (30 kV contact/air), IEC 61000-4-4 (4 kV level 4), and UL 497B certification. Its DO-201 package supports lead-free reflow per J-STD-020 MSL level 1 and withstands 260 °C soldering for 10 s at 5 mm from case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 53.2 V / 56 V / 58.8 V at 1 mA - defines precise reverse standoff threshold before avalanche conduction |
| VCL @ IPP | 77 V at 19.5 A (10/1000 µs) - maximum voltage seen by protected circuit during rated surge |
| PPP | 1500 W (10/1000 µs) - peak power dissipation capability under standard lightning surge waveform |
| IPP (max) | 19.5 A (10/1000 µs) - peak surge current that produces VCL = 77 V; critical for PCB trace sizing |
| RD | 0.933 Ω - dynamic resistance determining VCL rise vs. current deviation from test point |
| Tj max | +175 °C - enables operation in high-ambient environments like enclosed power converters |
| Leakage IRM | ≤1 µA at 47.8 V - ensures minimal standby power loss and signal integrity in high-impedance nodes |
Pinout & Package
1.5KE56CARL is housed in a DO-201 axial-leaded package with cathode band marking. The device has two terminals: anode (unmarked end) and cathode (banded end), configured for unidirectional clamping from cathode to anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for unidirectional clamping | Connected to ground or lower-potential rail; defines direction of surge current flow into cathode |
| Cathode | Surge input node | Connected to protected line (e.g., DC input); conducts avalanche current to anode during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD immunity | 30 kV air discharge and 30 kV contact discharge - exceeds industrial equipment immunity requirements without external filtering |
| Clamping ratio (VCL/VBR) | 1.37 (77 V / 56 V) - low ratio ensures minimal overvoltage stress on downstream ICs during transients |
| Thermal stability | αT = 10.3 × 10−4/°C - enables accurate VBR prediction across full operating temperature range |
| Lead finish | Matte tin plating - compatible with Pb-free reflow profiles and prevents whisker growth per JESD201 Class 2 |
| UL 497B recognition | File QVGQ2.E136224 - validates suitability for telecom and industrial signal/power interface protection |
Applications
| AC/DC Power Input Protection | Industrial PLC Digital Input |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller subjected to induced surges from nearby motor switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input terminal and ground to clamp fast-rising transients before reaching optocoupler input. Use Value: Limits voltage to ≤77 V during 19.5 A 10/1000 µs surge, preventing optocoupler damage and maintaining input logic integrity. |
Use Scenario: 230 V AC mains-connected rectifier output feeding a bulk capacitor and downstream SMPS controller. IC Role / Device Role / Timing Role: Primary-side TVS across DC bus to suppress lightning-induced surges propagating from AC line. Use Value: Absorbs 1500 W peak energy within 1 ms, limiting bus overvoltage to safe levels for electrolytic capacitor and MOSFET gate drivers. |
| Telecom Line Interface | Automotive Body Control Module |
Use Scenario: RS-485 data line exposed to ESD events in factory automation cabling. IC Role / Device Role / Timing Role: Unidirectional TVS on receiver side (VCC-to-line) to protect transceiver against contact discharge. Use Value: Clamps 30 kV ESD pulses to <77 V within nanoseconds, preserving transceiver differential input tolerance and avoiding latch-up. |
Use Scenario: 12 V battery feed to microcontroller reset line in automotive body electronics. IC Role / Device Role / Timing Role: Low-leakage TVS on reset rail to suppress load-dump and jump-start transients. Use Value: Withstands 175 °C junction temperature and maintains <1 µA leakage at 47.8 V, ensuring reliable MCU reset assertion during thermal cycling. |
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 | 600 W rating (10/1000 µs), DO-214AA package, VBR = 64.4–71.4 V, VCL = 93.6 V @ 6.4 A | Lower power handling; suited for space-constrained PCBs where 1500 W is not required | Select when board area is limited and surge threat level is ≤600 W; verify clamping margin against protected IC's absolute max rating |
| 1N6277A | Same DO-201 package, 1500 W rating, but VBR = 53.2–58.8 V and VCL = 77 V @ 19.5 A - identical electrical specs, different manufacturer (ON Semiconductor) | No functional difference; qualified for same IEC/UL standards and thermal profiles | Drop-in replacement for dual-sourcing; confirm tape/reel packaging compatibility and RoHS status alignment with production line |
Compared with SMBJ58A, 1.5KE56CARL delivers 2.5× higher surge power handling and tighter VCL margin for critical power rails; compared with 1N6277A, it offers identical protection performance with STMicroelectronics' ECOPACK environmental compliance and extended thermal qualification to 175 °C.
Availability
1.5KE56CARL is available at Aetrix Electronics and suitable for AC/DC power supplies, industrial PLC inputs, and telecom line interfaces requiring stable component supply, long-term lifecycle support, and certified surge immunity.
Supply support for 1.5KE56CARL 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, power, and microcontroller solutions for industrial, automotive, and consumer markets.
1.5KE56CARL belongs to the 1.5KE series of high-power TVS diodes engineered specifically for robust, planar-junction overvoltage protection in high-reliability power conversion and industrial control systems.
FAQ
What is the difference between 1.5KE56CARL and 1.5KE56A?
1.5KE56CARL and 1.5KE56A share identical electrical specifications and DO-201 packaging, but differ in packaging format: "RL" suffix indicates 1900-piece tape-and-reel delivery, while "A" denotes 600-piece ammopack. Both are unidirectional and rated for 1500 W (10/1000 µs). The "RL" variant is optimized for automated SMT placement.
Can 1.5KE56CARL be used in bidirectional applications?
No - 1.5KE56CARL is unidirectional (indicated by "A", not "CA"). It conducts only when cathode voltage exceeds anode by ≥53.2 V. For bidirectional protection (e.g., AC lines or data pairs), use 1.5KE56CA, which clamps symmetrically in both polarities and has identical VBR and VCL ratings.
How does junction temperature affect clamping voltage?
VCL increases with junction temperature at a rate of αT = 10.3 × 10−4/°C. At Tj = 125 °C, VCL rises to ~79.3 V (77 V × [1 + 0.00103 × (125 − 25)]), requiring design margin adjustment for high-temperature operation.
Is 1.5KE56CARL compliant with lead-free assembly requirements?
Yes - it features matte tin-plated leads and is qualified for Pb-free reflow per J-STD-020 MSL level 1. The recommended profile peaks at 240–245 °C for ≤3 seconds, with ramp rates ≤3 °C/s, and supports 260 °C for 10 s at 5 mm from case per MIL-STD-750 Method 2026.
1.5KE56CARL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE, TRANSIL™
- 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:
- 100V
- Current - Peak Pulse (10/1000µs):
- 100A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 900pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE56CARL FAQ
1.How can I place an order for 1.5KE56CARL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE56CARL 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 1.5KE56CARL reliable?
The price and inventory of 1.5KE56CARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE56CARL is usually 5 days.
3.What payment methods are accepted for 1.5KE56CARL?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE56CARL?
1.5KE56CARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE56CARL 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 1.5KE56CARL?
For technical support, including 1.5KE56CARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE56CARL requirements.
6.How does Aetrix verify that 1.5KE56CARL is sourced from the original manufacturer or authorized distributors?
All 1.5KE56CARL 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 1.5KE56CARL meets industry standards.
7.What is the process for return or replacement of 1.5KE56CARL?
All 1.5KE56CARL units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE56CARL, 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 1.5KE56CARL part is unused and in its original packaging.
Return procedure for 1.5KE56CARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE56CARL Tags
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