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Vishay General Semiconductor - Diodes Division 1.5KE36A-E3/54
- Part No.:
- 1.5KE36A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE36A-E3/54.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,281
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Product details
Overview
1.5KE36A-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection on DC power rails and signal lines. It features a 34.2 V to 37.8 V breakdown voltage (VBR) at 1.0 mA test current, 30.8 V maximum standoff voltage (VWM), 49.9 V clamping voltage (VC) at 30.1 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 1.5KE36A-E3/54 datasheet, 1.5KE36A-E3/54 pinout, 1.5KE36A-E3/54 application, or 1.5KE36A-E3/54 equivalent, this device delivers verified clamping performance for IEC 61000-4-5 surge immunity, fast sub-nanosecond response, and robust 200 A surge current handling - critical when selecting TVS components for 24 V industrial control systems, automotive body electronics, and PoE-powered devices.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below VWM (30.8 V), then avalanches sharply at VBR (min 34.2 V) to limit transient energy. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and low incremental surge resistance, enabling precise clamping without thermal runaway under repetitive surges.
The device complies with JEDEC DO-201AD package mechanical standards and supports soldering per J-STD-002/JESD 22-B102. With TJ range of –55 °C to +175 °C and RθJA = 75 °C/W, it sustains operation in under-hood automotive environments and high-temperature industrial enclosures without derating below 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 34.2 V / 37.8 V at 1.0 mA - defines reliable avalanche initiation threshold for consistent clamping onset |
| VWM | 30.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 49.9 V at 30.1 A - peak clamped voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 1500 W - surge power handling capability compatible with IEC 61000-4-5 Level 4 (4 kV line-to-earth) |
| IFSM | 200 A - 8.3 ms half-sine surge current rating, supporting motor drive and relay coil suppression |
| TJ max. | +175 °C - enables placement near heat sources (e.g., power MOSFETs) without thermal shutdown |
| RθJA | 75 °C/W - allows direct PCB mounting without heatsink for <1 W average dissipation |
Pinout & Package
Package: DO-201AD (Case Style 1.5KE), axial-leaded, epoxy-molded body meeting UL 94 V-0 flammability rating. Matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; establishes reference for unidirectional clamping |
| Cathode | High-side transient sink | Connected to protected line (e.g., 24 V rail); conducts surge current to ground during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance (±5 %) and <1.0 µA leakage at VWM, critical for low-power sensor nodes |
| 1500 W peak pulse power (10/1000 µs) | Supports EN 61000-4-5 4 kV surge testing without degradation across >1000 cycles |
| Sub-nanosecond response time | Clamps transients within 1 ns - faster than MOVs or polymer-based protectors, preserving signal integrity |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance, qualified for high-reliability industrial and automotive assembly |
| –55 °C to +175 °C operating range | Validated for under-hood automotive use (e.g., BCM, lighting modules) and industrial PLC backplanes |
Applications
| Automotive Body Control Module (BCM) | Industrial 24 V PLC Input Protection |
|---|---|
Use Scenario: Protects microcontroller I/O and CAN transceiver power rails from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional shunt clamp on 12 V/24 V supply input, activated within 1 ns of overvoltage event. Use Value: Limits VSUPPLY to ≤49.9 V during 100 V/50 ms load dump, preventing brownout reset or latch-up in MCU peripherals. |
Use Scenario: Shields digital input optocouplers and level translators from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Primary front-end TVS on 24 V DC input channel, placed before series current-limiting resistor. Use Value: Clamps 1 kV/0.5 J transients to <50 V, ensuring optocoupler CTR stability and eliminating false triggering in safety-critical inputs. |
| Telecom Power Feeding (PoE PSE) | Consumer Appliance Motor Drive |
Use Scenario: Safeguards IEEE 802.3af/at Power Sourcing Equipment (PSE) controller ICs from cable discharge events and lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional clamp on DC output side of PSE transformer secondary, referenced to common-mode ground. Use Value: Maintains VOUT ≤49.9 V during 1.5 kV ring wave surges, preserving isolation barrier integrity and preventing PSE shutdown. |
Use Scenario: Suppresses inductive kickback from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals, sinking flyback energy into chassis ground. Use Value: Absorbs 200 A/8.3 ms surge without failure, eliminating contact arcing in relay drivers and extending motor driver MOSFET lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | DO-214AA package (SMB), lower PPPM (600 W), same VBR range (34.2–37.8 V), higher VC (58.1 V) | Compact surface-mount alternative for space-constrained PCBs; not suitable for 1500 W surge requirements | Select SMBJ36A only if board layout prohibits axial DO-201AD and surge levels are ≤600 W (IEC 61000-4-5 Level 2) |
| 1.5KE36CA | Bidirectional variant (VBR = 34.2–37.8 V), identical PPPM and VC, no polarity marking | Required for AC-coupled or floating signal lines (e.g., RS-485, audio inputs) where polarity reversal occurs | Choose 1.5KE36CA only when protecting bidirectional signals; unidirectional 1.5KE36A-E3/54 is optimal for DC power rails with defined ground reference |
Compared with SMBJ36A, 1.5KE36A-E3/54 delivers 2.5× higher surge power handling and 8.2 V lower clamping voltage - essential for robust 24 V system protection. Against 1.5KE36CA, it offers superior leakage control and simpler polarity-aware layout, making it preferred for grounded DC supply lines.
Availability
1.5KE36A-E3/54 is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and telecom power feeding systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant procurement.
Supply support for 1.5KE36A-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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments, targeting applications demanding 1500 W surge capability, wide temperature operation, and AEC-Q101 qualification readiness.
FAQ
What is the clamping voltage of the 1.5KE36A-E3/54 under a 10/1000 µs surge?
The 1.5KE36A-E3/54 exhibits a maximum clamping voltage (VC) of 49.9 V when subjected to its rated peak pulse current of 30.1 A using the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and guarantees that downstream circuitry sees no more than 49.9 V during such transients - a critical parameter for protecting 3.3 V or 5 V logic interfaces powered from a 24 V rail via regulators. The 1.5KE36A-E3/54 maintains this clamping performance across its full operating temperature range.
Is the 1.5KE36A-E3/54 suitable for automotive applications?
Yes, the 1.5KE36A-E3/54 is widely deployed in automotive body electronics including door modules, lighting controls, and HVAC actuators. Its –55 °C to +175 °C junction temperature range, glass-passivated junction for long-term reliability, and RoHS-compliant E3 termination meet core requirements for under-hood and cabin-mounted ECUs. While not AEC-Q101 certified itself (only HE3 variants are), the 1.5KE36A-E3/54 shares identical die and construction with qualified versions and is routinely used in non-safety-critical automotive functions. The 1.5KE36A-E3/54 withstands load dump pulses and ISO 7637-2 transients when properly mounted with short traces.
How does the 1.5KE36A-E3/54 differ from the bidirectional 1.5KE36CA?
The 1.5KE36A-E3/54 is unidirectional, with a cathode band indicating polarity and optimized for DC rail protection where current flows in one direction. In contrast, the 1.5KE36CA lacks polarity marking and clamps symmetrically in both directions - required for AC signals or floating buses like RS-485. Both share identical VBR (34.2–37.8 V), PPPM (1500 W), and VC (49.9 V), but the 1.5KE36A-E3/54 offers lower leakage (<1.0 µA at 30.8 V) and simplified layout on grounded systems. Selecting the wrong polarity type risks ineffective clamping or catastrophic failure.
What is the thermal resistance of the 1.5KE36A-E3/54, and how does it affect PCB layout?
The 1.5KE36A-E3/54 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on a standard FR-4 PCB with minimum copper pad area. This means a 1 W power dissipation raises junction temperature by ~75 °C above ambient. For reliable operation at full 6.5 W steady-state rating, external heatsinking or large copper pours are required. In practice, most designs use the 1.5KE36A-E3/54 for transient-only duty (duty cycle <0.01 %), so thermal design focuses on minimizing trace inductance - keep leads short and ground connections direct to preserve sub-nanosecond response. The 1.5KE36A-E3/54's RθJL of 15.4 °C/W further supports efficient heat transfer to PCB copper via leads.
Can the 1.5KE36A-E3/54 be used in parallel to increase surge current handling?
No - the 1.5KE36A-E3/54 should not be paralleled without individual current-sharing resistors. Due to inherent VBR tolerances (±5 %), mismatched avalanche onset causes one device to conduct nearly all surge current, leading to thermal runaway and failure. Vishay explicitly advises against paralleling standard 1.5KE devices. If higher surge capacity is needed, select a single higher-rated part (e.g., 1.5KE43A) or use purpose-designed multi-chip TVS arrays. The 1.5KE36A-E3/54 is characterized and qualified as a standalone device; its 1500 W rating assumes proper PCB layout and thermal environment, not array operation.
1.5KE36A-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30.8V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 49.9V
- Current - Peak Pulse (10/1000µs):
- 30.1A
- 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
1.5KE36A-E3/54 FAQ
1.How can I place an order for 1.5KE36A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE36A-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 1.5KE36A-E3/54 reliable?
The price and inventory of 1.5KE36A-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 1.5KE36A-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE36A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE36A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE36A-E3/54?
1.5KE36A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE36A-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 1.5KE36A-E3/54?
For technical support, including 1.5KE36A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE36A-E3/54 requirements.
6.How does Aetrix verify that 1.5KE36A-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE36A-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 1.5KE36A-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE36A-E3/54?
All 1.5KE36A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE36A-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 1.5KE36A-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE36A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE36A-E3/54 Tags
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