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Vishay General Semiconductor - Diodes Division 1.5KE56A-E3/73
- Part No.:
- 1.5KE56A-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE56A-E3/73.pdf
- Description:
- TVS DIODE 47.8VWM 77VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,323
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Product details
Overview
1.5KE56A-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 53.2 V to 58.8 V breakdown voltage (VBR) at 1 mA, 47.8 V maximum working peak reverse voltage (VWM), 77.0 V 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 power supply input stages and industrial sensor interface protection.
For engineers reviewing the 1.5KE56A-E3/73 datasheet, 1.5KE56A-E3/73 pinout, 1.5KE56A-E3/73 application, or 1.5KE56A-E3/73 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package mechanical data, clamping behavior under surge conditions, thermal derating curves, and direct alternative part comparisons - all validated against Vishay Document #88301 (Rev. 09-Aug-2022).
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds VBR, it avalanches into low-impedance conduction to divert surge current away from downstream ICs. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VWM), while the 10/1000 µs waveform rating reflects standardized lightning-surge immunity testing per IEC 61000-4-5.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15.4 °C/W, enabling reliable operation up to TJ = 175 °C. The device supports soldering per JESD 22-B106 (275 °C, 10 s) and meets JESD 201 Class 1A whisker resistance (E3 suffix), confirming suitability for commercial-grade industrial PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V at 1 mA - defines precise avalanche initiation threshold for repeatable clamping onset |
| VWM | 47.8 V - maximum continuous reverse operating voltage before leakage rises above 1 µA |
| VC @ IPPM | 77.0 V at 19.5 A - clamped voltage during 1500 W surge, limiting stress on protected MOSFET gate or MCU I/O |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform, aligned with IEC 61000-4-5 Level 4 immunity |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine), supporting inrush or load-dump events |
| TJ range | –55 °C to +175 °C - extended junction temperature range enables under-hood automotive and high-ambient industrial use |
| Package | JEDEC DO-201AD (Case Style 1.5KE) - axial-leaded, epoxy-molded package with UL 94 V-0 flammability rating |
Pinout & Package
1.5KE56A-E3/73 uses the standard DO-201AD axial package (Case Style 1.5KE), with cathode identified by a color band on the body. Leads are matte tin-plated and compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to ground or low-impedance return plane; carries full IPPM during clamping |
| Cathode | Avalanche conduction node / protected line connection | Connected to line being protected (e.g., 48 V rail); voltage referenced to anode during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5 %) and <1 µA leakage at VWM across –55 °C to +125 °C |
| 1500 W peak pulse power (10/1000 µs) | Supports EN 61000-4-5 Level 4 (4 kV line-to-earth) surge protection without external series impedance |
| Response time ≤1 ns | Clamps transients faster than MOVs or GDTs, protecting sensitive CMOS inputs before damage occurs |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance and JESD 22-B106 solder dip (275 °C, 10 s) |
| UL 94 V-0 molded epoxy case | Provides flame-retardant mechanical encapsulation suitable for enclosed industrial enclosures and automotive junction boxes |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: 12 V/24 V battery-fed ECUs exposed to ISO 7637-2 load dump pulses up to 120 V. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between power rail and chassis ground to limit voltage excursion during transient events. Use Value: Clamps to 77.0 V at 19.5 A, preventing gate oxide rupture in downstream PMICs and CAN transceivers rated for 60 V absolute max. |
Use Scenario: 4–20 mA analog sensor loop in factory automation subject to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional-capable but used unidirectionally across signal and return, absorbing common-mode surges. Use Value: Sub-1 ns response preserves signal integrity during fast transients; low VWM avoids interfering with normal 24 V loop bias. |
| Telecom DC Power Feeds | Consumer Power Adapter Output Stage |
Use Scenario: -48 V telecom rectifier output feeding base station backplane with lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC bus, upstream of point-of-load regulators. Use Value: 1500 W rating handles multi-kA induced surges; 175 °C TJ max supports sealed, fanless enclosure operation. |
Use Scenario: USB-C PD adapter 20 V output stage exposed to hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Final-stage TVS between output capacitor and connector, suppressing overshoot during dynamic load changes. Use Value: Tight VBR tolerance (53.2–58.8 V) ensures clamping initiates before 20 V rail exceeds 24 V absolute max of connected devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ58A | DO-214AC (SMA) package; 58.0–64.1 V VBR; 72.7 V VC @ 17.4 A; 400 W PPPM | Lower power rating limits use to sub-IEC Level 3 surges; surface-mount only | Select when board space is constrained and surge energy is limited to <400 W (e.g., secondary-side USB ports) |
| ON Semiconductor 1.5SMC56A | SMB package; 53.2–58.8 V VBR; 77.0 V VC @ 19.5 A; identical PPPM and clamping, but higher RθJA (100 °C/W) | Requires larger copper area for thermal management; not qualified to JESD 201 Class 1A | Use where footprint compatibility with SMB is required and lead-free reflow profile allows higher TL |
Compared with 1.5KE56A-E3/73, SMAJ58A offers smaller size but sacrifices 73 % peak power capability and requires layout redesign; 1.5SMC56A matches electrical specs but demands greater PCB thermal relief and lacks whisker-tested leads - making 1.5KE56A-E3/73 optimal for high-energy, through-hole, reliability-critical applications.
Availability
1.5KE56A-E3/73 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor signal line clamp, telecom DC power feeds, and consumer power adapter output stage applications requiring stable component supply, long-term lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for 1.5KE56A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power handling, and automotive qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where robustness against lightning, load dump, and ESD is non-negotiable.
FAQ
What is the breakdown voltage tolerance for 1.5KE56A-E3/73?
The 1.5KE56A-E3/73 has a guaranteed breakdown voltage range of 53.2 V to 58.8 V at 1 mA test current, representing ±5 % tolerance around the nominal 56 V rating. This tight VBR window ensures predictable clamping onset across temperature and production lots, critical for protecting 48 V systems where overvoltage margin is narrow. All units meet this spec per Vishay Document #88301.
Is 1.5KE56A-E3/73 suitable for bidirectional transient suppression?
No - 1.5KE56A-E3/73 is a unidirectional TVS diode, indicated by the "A" suffix. Bidirectional variants use the "CA" suffix (e.g., 1.5KE56CA). While the device can block reverse voltage up to 47.8 V, it conducts only in reverse avalanche mode; forward conduction is not specified for surge suppression. For AC or dual-polarity lines, 1.5KE56CA must be selected instead.
What is the maximum clamping voltage of 1.5KE56A-E3/73 under surge conditions?
The maximum clamping voltage (VC) of 1.5KE56A-E3/73 is 77.0 V at 19.5 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during worst-case surge events - essential for verifying margin against downstream component absolute maximum ratings.
Does 1.5KE56A-E3/73 comply with automotive reliability standards?
The base 1.5KE56A-E3/73 is commercial-grade and not AEC-Q101 qualified. However, the variant 1.5KE56AHE3_B (same electrical specs, "HE3" suffix) is explicitly AEC-Q101 qualified per Vishay Document #88301, Note (2). For automotive applications requiring qualification, that HE3 version must be specified - the E3/73 reel packaging does not imply automotive qualification.
What package type and lead finish does 1.5KE56A-E3/73 use?
1.5KE56A-E3/73 uses the JEDEC DO-201AD axial package (Case Style 1.5KE), with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. The E3 suffix confirms compliance with JESD 201 Class 1A whisker resistance testing, and the device supports solder dip at 275 °C for 10 seconds per JESD 22-B106 - suitable for wave and selective soldering processes.
1.5KE56A-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:
- Active
- 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:
- 1.5KE
1.5KE56A-E3/73 FAQ
1.How can I place an order for 1.5KE56A-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE56A-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 1.5KE56A-E3/73 reliable?
The price and inventory of 1.5KE56A-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 1.5KE56A-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE56A-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE56A-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE56A-E3/73?
1.5KE56A-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE56A-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 1.5KE56A-E3/73?
For technical support, including 1.5KE56A-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE56A-E3/73 requirements.
6.How does Aetrix verify that 1.5KE56A-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE56A-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 1.5KE56A-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE56A-E3/73?
All 1.5KE56A-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE56A-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 1.5KE56A-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE56A-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE56A-E3/73 Tags
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