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Vishay General Semiconductor - Diodes Division 1.5KE56C-E3/54
- Part No.:
- 1.5KE56C-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE56C-E3/54.pdf
- Description:
- TVS DIODE 45.4VWM 80.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,586
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Product details
Overview
1.5KE56C-E3/54 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for clamping inductive switching surges and lightning-induced transients across signal and power lines. It features a 56 V breakdown voltage (VBR = 53.2–58.8 V), 1500 W peak pulse power (10/1000 µs), 77.0 V maximum clamping voltage at 19.5 A, 1.0 mA test current, and operates from –55 °C to +175 °C. It is used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the 1.5KE56C-E3/54 datasheet, 1.5KE56C-E3/54 pinout, 1.5KE56C-E3/54 application, or 1.5KE56C-E3/54 equivalent, key selection criteria include bidirectional clamping capability, 77.0 V clamping voltage at rated IPPM, RoHS-compliant matte tin leads, JEDEC 1.5KE package, and compliance with UL 94 V-0 epoxy molding.
Technical Context
This device functions as a voltage-clamped shunt protector, responding in <1 ns to transient overvoltages by entering avalanche conduction. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, while its unidirectional/bidirectional variants are distinguished by marking (cathode band) and internal symmetry - 1.5KE56C-E3/54 is explicitly bidirectional per part suffix "C" and data sheet table entry.
The 1.5KE56C-E3/54 delivers 1500 W peak pulse power under 10/1000 µs waveform at 0.01% duty cycle, with thermal resistance of 75 °C/W (junction-to-ambient) and 15.4 °C/W (junction-to-lead). Its stand-off voltage is 47.8 V, reverse leakage ≤1.0 µA at VWM, and temperature coefficient of VBR is +0.103 %/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V - defines guaranteed avalanche initiation range at 1.0 mA test current |
| VWM | 47.8 V - maximum continuous working voltage before significant leakage begins |
| VC @ IPPM | 77.0 V - clamping voltage seen by protected circuit during 19.5 A transient surge |
| PPPM | 1500 W - peak transient energy absorption capacity under standardized 10/1000 µs pulse |
| IPPM | 19.5 A - maximum non-repetitive surge current the device safely clamps without failure |
| TJ Range | –55 °C to +175 °C - enables operation in under-hood automotive and high-temp industrial environments |
| Package | JEDEC 1.5KE - axial-leaded, molded epoxy case meeting UL 94 V-0 flammability rating |
Pinout & Package
1.5KE56C-E3/54 uses a two-terminal axial-leaded package (Case Style 1.5KE) with no polarity marking - consistent with its bidirectional function. Leads are matte tin-plated and solderable per J-STD-002/JESD 22-B102; no cathode band is present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche terminal | Either lead serves as input/output - no DC polarity dependency; clamps positive and negative transients equally |
| Leads (matte tin) | Thermal and electrical interface | Provides mechanical mounting, heat conduction path (RθJL = 15.4 °C/W), and solder joint reliability per JESD 201 Class 1A |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1 µA), and long-term reliability under repeated surge stress |
| 1500 W peak pulse power (10/1000 µs) | Supports robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24 V industrial buses |
| UL 94 V-0 epoxy molding | Prevents flame propagation in enclosure-mounted protection circuits, satisfying safety standards for industrial control panels |
| RoHS-compliant E3 suffix | Meets EU RoHS Directive 2011/65/EU and JESD 201 Class 1A whisker resistance for lead-free assembly |
| Fast response time (<1 ns) | Clamps transients before sensitive downstream logic or analog circuitry experiences overvoltage damage |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump spikes (up to 120 V) and alternator ripple on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Shunt clamping element placed across power rail input, triggered within nanoseconds to limit voltage excursion to ≤77.0 V. Use Value: Prevents latch-up or gate oxide rupture in MCU power management ICs by holding rail voltage below absolute maximum ratings during ISO 7637-2 Pulse 5a events. | Use Scenario: Protecting 4–20 mA current-loop transmitters and RS-485 nodes from ESD and induced surges in factory-floor wiring. IC Role / Device Role / Timing Role: Bidirectional voltage clamp on differential bus lines, symmetrically limiting both polarities of fast transients. Use Value: Maintains signal integrity by clamping common-mode surges to <77.0 V while preserving low-capacitance signal path (<100 pF typical) for 1 Mbps RS-485 operation. |
| Telecom AC/DC Input Stage | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding bridge rectifier outputs and primary-side controllers in offline SMPS against lightning-induced surges on AC mains input. IC Role / Device Role / Timing Role: Secondary-side TVS placed across bulk capacitor or controller VCC rail to clamp fast-rising line transients. Use Value: Enables compliance with IEC 61000-4-5 (1.2/50 µs + 8/20 µs combo wave) by absorbing >1500 W peak energy without degradation over 100,000 surge cycles. | Use Scenario: Shielding microcontroller GPIOs and H-bridge gate drivers from back-EMF spikes generated by brushed DC motors in washing machines or HVAC blowers. IC Role / Device Role / Timing Role: Localized bidirectional clamp mounted directly at motor connector or driver IC supply pins. Use Value: Limits voltage overshoot to 77.0 V during 200 A inductive turn-off events, preventing destructive gate-source breakdown in N-channel MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58CA | DO-214AA package, 58 V VBR, 600 W PPPM, lower IPPM (10.1 A), surface-mount | Lower power handling; suited for PCB space-constrained designs where 1500 W is not required | Select SMBJ58CA when board area is limited and surge threat level is ≤IEC 61000-4-5 Level 3 (2 kV) |
| 1.5SMC58CA | SMA package, same VBR range, 1500 W PPPM, but higher VC (93.6 V), axial leads omitted | Higher clamping voltage reduces system-level protection margin; requires layout review for thermal relief | Choose 1.5SMC58CA only if axial lead mounting is not feasible and 93.6 V clamping is acceptable for protected ICs |
Compared with 1.5KE56C-E3/54, SMBJ58CA offers compact SMT integration at half the surge power, while 1.5SMC58CA matches peak power but sacrifices clamping performance - making 1.5KE56C-E3/54 optimal for high-energy, through-hole mounted protection where low VC and proven thermal robustness are critical.
Availability
1.5KE56C-E3/54 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom AC/DC inputs, and consumer appliance motor drives requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE56C-E3/54 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and ruggedness.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure due to voltage surges must be eliminated.
FAQ
What does the "C" suffix in 1.5KE56C-E3/54 indicate?
The "C" suffix in 1.5KE56C-E3/54 denotes a bidirectional configuration - meaning the device clamps voltage transients of either polarity symmetrically. Unlike unidirectional variants (e.g., 1.5KE56A), it has no cathode marking and provides identical VBR, VC, and IPPM performance for positive and negative surges. This makes 1.5KE56C-E3/54 ideal for AC-coupled or differential signal line protection where polarity reversal is possible.
Is 1.5KE56C-E3/54 RoHS compliant and lead-free?
Yes, 1.5KE56C-E3/54 is RoHS compliant and lead-free, as confirmed by the "E3" suffix per Vishay's ordering nomenclature. The matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability standards, and the device passes JESD 201 Class 1A whisker testing. Full compliance documentation, including substance declarations and test reports, is available upon request for 1.5KE56C-E3/54.
What is the maximum clamping voltage of 1.5KE56C-E3/54 under surge conditions?
The maximum clamping voltage (VC) of 1.5KE56C-E3/54 is 77.0 V at its rated peak pulse current (IPPM) of 19.5 A, measured using the standard 10/1000 µs waveform. This value represents the upper voltage limit imposed on the protected circuit during worst-case transient events and is critical for ensuring downstream ICs remain within their absolute maximum voltage ratings. The 1.5KE56C-E3/54 achieves this with low incremental surge resistance and fast sub-nanosecond response.
Can 1.5KE56C-E3/54 replace unidirectional 1.5KE56A in existing designs?
No - 1.5KE56C-E3/54 cannot directly replace unidirectional 1.5KE56A without circuit review. While both share identical VBR (53.2–58.8 V) and PPPM (1500 W), the 1.5KE56C-E3/54 lacks polarity marking and conducts in both directions, potentially causing unintended conduction in DC-biased rails. Use 1.5KE56C-E3/54 only where bidirectional clamping is required; for DC applications, retain 1.5KE56A or verify bias network compatibility before substituting 1.5KE56C-E3/54.
What is the operating temperature range for 1.5KE56C-E3/54?
The operating junction and storage temperature range for 1.5KE56C-E3/54 is –55 °C to +175 °C, as specified in Vishay's datasheet Document Number 88301. This wide range supports deployment in under-hood automotive modules, industrial motor controls, and outdoor telecom equipment. Derating curves (Fig. 2 and Fig. 5) define allowable power reduction above 25 °C ambient, ensuring reliable 1.5KE56C-E3/54 performance across full thermal conditions.
1.5KE56C-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 45.4V
- Voltage - Breakdown (Min):
- 50.4V
- Voltage - Clamping (Max) @ Ipp:
- 80.5V
- Current - Peak Pulse (10/1000µs):
- 18.6A
- 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:
- 1.5KE
1.5KE56C-E3/54 FAQ
1.How can I place an order for 1.5KE56C-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE56C-E3/54 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 1.5KE56C-E3/54 reliable?
The price and inventory of 1.5KE56C-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE56C-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE56C-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE56C-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE56C-E3/54?
1.5KE56C-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE56C-E3/54 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 1.5KE56C-E3/54?
For technical support, including 1.5KE56C-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE56C-E3/54 requirements.
6.How does Aetrix verify that 1.5KE56C-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE56C-E3/54 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 1.5KE56C-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE56C-E3/54?
All 1.5KE56C-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE56C-E3/54, 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 1.5KE56C-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE56C-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE56C-E3/54 Tags
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Diodes Incorporated
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Diodes Incorporated
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