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Vishay General Semiconductor - Diodes Division 1.5KE56C-E3/73
- Part No.:
- 1.5KE56C-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE56C-E3/73.pdf
- Description:
- TVS DIODE 45.4VWM 80.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,860
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Product details
Overview
1.5KE56C-E3/73 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for clamping voltage transients on signal and power lines. It features a 53.2 V to 58.8 V breakdown voltage (VBR) at 1 mA, 47.8 V standoff voltage (VWM), 77.0 V maximum clamping voltage (VC) at 19.5 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used in automotive sensor protection and industrial I/O interface surge hardening.
For engineers reviewing the 1.5KE56C-E3/73 datasheet, 1.5KE56C-E3/73 pinout, 1.5KE56C-E3/73 application, or 1.5KE56C-E3/73 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, bidirectional clamping behavior, thermal derating curves, and direct alternatives for ESD/lightning transient suppression in 24 V and 48 V systems.
Technical Context
This device operates as a silicon avalanche diode with glass-passivated junction, delivering symmetrical clamping in both directions due to its bidirectional polarity. Its 10/1000 µs waveform response supports high-energy transients up to 19.5 A while maintaining ≤77.0 V clamping - critical for protecting downstream MOSFETs and microcontrollers against ISO 7637-2 Pulse 1/2b and IEC 61000-4-5 surges.
It exhibits low incremental surge resistance and fast sub-nanosecond response time (<1 ns), enabling effective suppression before sensitive circuitry sustains damage. The device is rated for -55 °C to +175 °C operating junction temperature and meets JESD 22-B106 solderability standards with matte tin-plated leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 53.2 V / 58.8 V at 1 mA - defines reliable avalanche initiation threshold under bidirectional stress |
| VWM | 47.8 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 77.0 V at 19.5 A - clamped voltage during full 1500 W transient, limiting stress on protected ICs |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform, suitable for automotive load dump immunity |
| TJ max | +175 °C - enables operation in under-hood and industrial control cabinet environments |
| Package | JEDEC DO-201AD (Case Style 1.5KE) - axial-leaded, epoxy-molded, UL 94 V-0 compliant housing |
| RθJL | 15.4 °C/W - low junction-to-lead thermal resistance supports sustained surge duty without thermal runaway |
Pinout & Package
Package: JEDEC DO-201AD molded epoxy case with axial leads; cathode band not marked (bidirectional configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (reverse bias) | One end of symmetrical avalanche junction; conducts when voltage exceeds -VBR |
| Cathode | Transient current entry (forward bias) | Other end of symmetrical junction; conducts when voltage exceeds +VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress |
| 1500 W peak pulse power | Withstands 10/1000 µs transients common in 24 V industrial PLC I/O and automotive body electronics |
| Sub-nanosecond response time | Clamps within <1 ns - faster than MOVs or polymer-based suppressors, preserving signal integrity |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed industrial and automotive enclosures |
| Matte tin plated leads | Complies with J-STD-002 and JESD 22-B102 for robust solder joint formation and whisker resistance |
Applications
| Automotive Sensor Protection | Industrial PLC Digital I/O |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor front-ends from ISO 7637-2 load dump and jump-start transients in 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across supply rails or signal lines to limit transient overvoltage before it reaches the IC input stage. Use Value: Limits clamped voltage to ≤77.0 V during 19.5 A surge, preventing latch-up or gate oxide rupture in 3.3 V/5 V microcontrollers and transceivers. | Use Scenario: Hardening 24 V digital input modules against field-induced surges from relay coil switching and motor drive noise in factory automation. IC Role / Device Role / Timing Role: Primary overvoltage clamp on channel-level inputs, mounted directly at terminal block entry point. Use Value: Absorbs 1500 W pulses without degradation, maintaining ≤1 µA leakage at 47.8 V to avoid false triggering in high-impedance sensing circuits. |
| Telecom Line Interface | Power Supply Input Stage |
Use Scenario: Surge protection on RS-485/RS-232 data lines exposed to lightning-induced surges in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Differential-mode TVS pair (two devices) across A/B lines to suppress common-mode and differential transients. Use Value: Symmetrical 53.2–58.8 V breakdown ensures balanced clamping, preserving signal common-mode range while limiting peak differential voltage to 77.0 V. | Use Scenario: Secondary overvoltage clamp on DC-DC converter input after primary MOV, targeting fast-rising transients missed by slower protectors. IC Role / Device Role / Timing Role: Fast-response backup suppressor placed downstream of bulk filtering to catch residual ringing and EFT bursts. Use Value: Sub-ns response captures transients that bypass upstream protection, reducing risk of MOSFET avalanche failure in buck controller ICs. |
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 (SMB), 58 V VBR, 93.6 V VC @ 12.9 A, 600 W PPPM | Lower power rating and higher clamping voltage; suited for space-constrained PCBs where 1500 W is not required | Select SMBJ58CA when board area is limited and peak surge energy is ≤600 W; verify layout thermal relief for SMB footprint |
| 1.5SMC58CA | SMD DO-214AB (SMC) package, same 58 V VBR, 93.6 V VC @ 12.9 A, 1500 W rating but lower IPPM derating above 25 °C | Surface-mount alternative with identical power rating but reduced thermal mass; requires careful PCB copper pour design | Choose 1.5SMC58CA only with ≥1 in² 2-oz copper pad and thermal vias; avoid in high-ambient (>85 °C) chassis-mounted locations |
Compared with 1.5KE56C-E3/73, SMBJ58CA trades axial-leaded ruggedness and thermal performance for compactness, while 1.5SMC58CA retains 1500 W capability but demands stricter PCB thermal management - making 1.5KE56C-E3/73 optimal for high-reliability through-hole deployments in harsh environments.
Availability
1.5KE56C-E3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and DC power supply input stages requiring stable component supply, long-lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for 1.5KE56C-E3/73 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The 1.5KE series was engineered specifically for high-energy transient suppression in demanding industrial and automotive environments, balancing robust surge handling, tight VBR tolerance, and long-term stability under thermal cycling.
FAQ
What is the breakdown voltage range of the 1.5KE56C-E3/73?
The 1.5KE56C-E3/73 has a guaranteed breakdown voltage (VBR) range of 53.2 V to 58.8 V at 1 mA test current, measured in both directions due to its bidirectional construction. This range ensures consistent clamping behavior regardless of transient polarity and aligns with the "56" nominal voltage designation per JEDEC standard. The 1.5KE56C-E3/73 maintains this specification across -55 °C to +175 °C junction temperature.
Is the 1.5KE56C-E3/73 RoHS compliant and qualified for automotive use?
Yes, the 1.5KE56C-E3/73 carries the "E3" suffix indicating RoHS compliance per EU Directive 2011/65/EU and material categorization per Vishay document 99912. However, it is commercial grade only - AEC-Q101 qualification applies only to variants with "HE3" suffix (e.g., 1.5KE56AHE3_B). The 1.5KE56C-E3/73 is not AEC-Q101 certified, though its 175 °C TJ max and robust construction support many non-automotive transportation and industrial applications.
How does the clamping voltage of the 1.5KE56C-E3/73 compare to its standoff voltage?
The 1.5KE56C-E3/73 has a maximum standoff voltage (VWM) of 47.8 V and a maximum clamping voltage (VC) of 77.0 V at 19.5 A - resulting in a clamping ratio of ~1.61. This margin ensures reliable operation below breakdown during normal conditions while providing defined overvoltage limiting during transients. The 1.5KE56C-E3/73 achieves this with low incremental surge resistance, minimizing voltage overshoot beyond VC.
Can the 1.5KE56C-E3/73 be used in parallel for higher surge current handling?
While the 1.5KE56C-E3/73 datasheet notes TVS diodes can be used in parallel to increase peak power ratings, doing so requires matched VBR units and current-sharing resistors to prevent thermal runaway. Vishay does not specify matched binning for 1.5KE56C-E3/73, and parallel use without derating or external balancing is not recommended. For >19.5 A surge current, select a higher-rated device or verify matching per application note AN942.
What is the lead finish and soldering compatibility of the 1.5KE56C-E3/73?
The 1.5KE56C-E3/73 features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 for reliable solder wetting, and passes JESD 201 Class 1A whisker testing. It supports solder dip at 275 °C for up to 10 seconds per JESD 22-B106. Reflow profiles must respect its 175 °C TJ max - peak board temperature should remain below 260 °C to avoid junction overheating during assembly. The 1.5KE56C-E3/73 is compatible with standard SnPb and lead-free processes.
1.5KE56C-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- 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-E3/73 FAQ
1.How can I place an order for 1.5KE56C-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE56C-E3/73 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-E3/73 reliable?
The price and inventory of 1.5KE56C-E3/73 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-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE56C-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE56C-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE56C-E3/73?
1.5KE56C-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE56C-E3/73 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-E3/73?
For technical support, including 1.5KE56C-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE56C-E3/73 requirements.
6.How does Aetrix verify that 1.5KE56C-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE56C-E3/73 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-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE56C-E3/73?
All 1.5KE56C-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE56C-E3/73, 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-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE56C-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE56C-E3/73 Tags
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