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Vishay General Semiconductor - Diodes Division 1.5KE36CA-E3/54
- Part No.:
- 1.5KE36CA-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE36CA-E3/54.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,626
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Product details
Overview
1.5KE36CA-E3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 34.2 V to 37.8 V breakdown voltage (VBR) at 1 mA, 30.8 V maximum standoff voltage (VWM), 49.9 V clamping voltage (VC) at 30.1 A peak pulse current, 1500 W peak pulse power rating with 10/1000 µs waveform, and operates across –55 °C to +175 °C junction temperature range - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5KE36CA-E3/54 datasheet, 1.5KE36CA-E3/54 pinout, 1.5KE36CA-E3/54 application, or 1.5KE36CA-E3/54 equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal derating curves, RoHS-compliant packaging details, and direct alternative part comparisons for ESD and lightning surge protection design validation.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for sub-nanosecond response (<1 ns) and low incremental surge resistance. Its bidirectional architecture enables symmetrical clamping in AC-coupled or floating signal paths without polarity constraints, supporting both differential and common-mode transient suppression.
The device complies with JEDEC standards for surge testing (8.3 ms half-sine, 10/1000 µs waveform), delivers 1500 W peak pulse power at TA = 25 °C, and exhibits a temperature coefficient of VBR of +0.099 %/°C - enabling predictable voltage drift under thermal stress in engine control units and telecom line cards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 34.2 V / 37.8 V at 1 mA - defines reliable conduction onset threshold for bidirectional overvoltage events |
| VWM | 30.8 V - maximum continuous working voltage before leakage exceeds 1 µA, ensuring no false triggering |
| VC @ IPPM | 49.9 V at 30.1 A - clamped voltage during 10/1000 µs surge, limiting downstream IC stress to safe levels |
| PPPM | 1500 W - peak transient energy absorption capacity, sufficient for IEC 61000-4-5 Level 4 surges |
| TJ Range | –55 °C to +175 °C - supports under-hood automotive and industrial ambient environments without derating loss |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with matte tin-plated leads, UL 94 V-0 molded epoxy body |
| RoHS Status | E3 suffix - RoHS-compliant, JESD 201 Class 1A whisker-tested, commercial-grade qualification |
Pinout & Package
1.5KE36CA-E3/54 uses a two-terminal axial-leaded DO-201AD (Case Style 1.5KE) package. Bidirectional construction means neither terminal is designated anode or cathode; no polarity marking is present on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Transient current path | Provides symmetrical conduction in either direction - connects across protected line and return (e.g., RS-485 A/B, CAN H/L, or AC power rails) |
| Leads (matte tin) | Thermal and electrical interface | Supports 275 °C solder dip (10 s max), J-STD-002 solderability, and 15.4 °C/W junction-to-lead thermal resistance |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC or floating DC lines without external polarity management |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 4 kV/2 Ω surge test waveforms without degradation |
| Sub-nanosecond response time | Clamps transients within 1 ns - faster than MOVs or polymer-based protectors, preserving signal integrity |
| Glass-passivated junction | Ensures stable VBR and low leakage (<1 µA at VWM) over 10+ year field life in humid environments |
| UL 94 V-0 flammability rating | Molded epoxy body self-extinguishes under flame exposure - required for automotive and industrial safety certifications |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
Use Scenario: Protecting wheel speed, crankshaft, or oxygen sensor signal lines from load dump and inductive switching transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Standoff-mode TVS placed between sensor output and microcontroller ADC input, clamping spikes before they reach analog front-end circuitry. Use Value: Maintains signal fidelity below 30.8 V operating window while suppressing >49.9 V transients - preventing ADC saturation and MCU reset events. | Use Scenario: Safeguarding differential data lines in factory automation PLCs exposed to motor drive noise and ground bounce. IC Role / Device Role / Timing Role: Bidirectional shunt protector across RS-485 A/B terminals, absorbing common-mode surges induced by nearby VFDs or relay switching. Use Value: Symmetrical 34.2–37.8 V breakdown ensures equal clamping on both polarities - eliminating need for dual unidirectional devices and reducing BOM count. |
| Telecom Line Card | Consumer Power Adapter |
Use Scenario: Shielding Ethernet PHY or DSL line drivers from lightning-induced surges on outdoor copper pairs per ITU-T K.20/K.21. IC Role / Device Role / Timing Role: Primary-level TVS mounted at connector entry point, coordinated with secondary GDT or MOV stages for staged energy handling. Use Value: 1500 W rating handles first-wave surge energy; 49.9 V clamping preserves PHY compliance with IEEE 802.3af voltage tolerance limits. | Use Scenario: Secondary-side overvoltage clamp in AC/DC adapters for smart home hubs, guarding against transformer regulation failure or rectifier short. IC Role / Device Role / Timing Role: Fast-acting crowbar across DC output rail, triggered before downstream LDOs or USB controllers experience overvoltage damage. Use Value: 175 °C max junction temperature allows operation in sealed enclosures; RoHS/E3 compliance meets global regulatory requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | DO-214AA (SMB) surface-mount package; same VBR range (34.2–37.8 V), identical 1500 W PPPM, but lower IPPM (24.6 A) and higher VC (58.1 V) | Requires PCB re-layout for SMT placement; less suitable for through-hole prototyping or high-vibration mechanical mounting | Select when board space is constrained and automated assembly is used - verify clamping margin against downstream IC absolute maximum ratings. |
| 1.5KE36A-E3/54 | Unidirectional variant; same package, VBR, and PPPM, but includes cathode band marking and forward voltage (VF = 3.5 V @ 100 A) | Only usable in DC-biased circuits with known polarity; cannot protect AC or floating signals without series blocking capacitor | Choose only for fixed-polarity DC rails where reverse conduction must be blocked - e.g., 24 V PLC input protection with grounded return. |
Compared with 1.5KE36CA-E3/54, SMBJ36CA trades axial-leaded robustness and lower clamping for compact SMT integration, while 1.5KE36A-E3/54 sacrifices bidirectionality for unidirectional blocking - making the original the optimal choice for general-purpose AC-coupled or polarity-agnostic surge protection where mechanical reliability and symmetrical clamping are critical.
Availability
1.5KE36CA-E3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, telecom line cards, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for 1.5KE36CA-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 ruggedized performance.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure due to voltage surges must be eliminated without compromising signal integrity or thermal stability.
FAQ
What is the clamping voltage of the 1.5KE36CA-E3/54 under a standard 10/1000 µs surge?
The 1.5KE36CA-E3/54 has a maximum clamping voltage (VC) of 49.9 V at 30.1 A peak pulse current under a 10/1000 µs waveform. This value is measured per JEDEC standards and ensures downstream components remain within safe operating voltage limits during transient events. The 1.5KE36CA-E3/54 achieves this with low incremental surge resistance and fast response, making it suitable for protecting sensitive analog and digital ICs in real-world surge conditions.
Is the 1.5KE36CA-E3/54 RoHS compliant and qualified for automotive use?
The 1.5KE36CA-E3/54 carries the E3 suffix, confirming RoHS compliance and JESD 201 Class 1A whisker testing. However, it is a commercial-grade part - not AEC-Q101 qualified. For automotive applications requiring AEC-Q101, the HE3 variant (e.g., 1.5KE36CAHE3_B) must be selected. The 1.5KE36CA-E3/54 remains widely used in non-safety-critical automotive subsystems where full qualification is not mandated, supported by its –55 °C to +175 °C operating range.
How does the bidirectional design of the 1.5KE36CA-E3/54 affect its circuit placement?
The 1.5KE36CA-E3/54 has no polarity marking and conducts identically in both directions, allowing placement across any two nodes subject to differential or common-mode transients - such as RS-485 A/B lines, CAN H/L, or AC power inputs. Unlike unidirectional TVS diodes, it eliminates concerns about orientation during assembly and supports floating or AC-coupled topologies without additional biasing. This simplifies layout and improves reliability in bidirectional signal paths.
What is the thermal resistance and power derating behavior of the 1.5KE36CA-E3/54?
The 1.5KE36CA-E3/54 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W and junction-to-ambient (RθJA) of 75 °C/W. Its 6.5 W steady-state power dissipation is rated at TL = 75 °C on infinite heatsink; above that, power must be linearly derated per Figure 5 in the datasheet. At 125 °C lead temperature, usable power drops to ~3.25 W. This behavior is critical when deploying the 1.5KE36CA-E3/54 in enclosed, high-ambient environments like engine control modules.
Can the 1.5KE36CA-E3/54 be used in parallel to increase surge handling capacity?
Yes - multiple 1.5KE36CA-E3/54 devices can be paralleled to distribute surge current and increase total peak pulse power handling, provided matched VBR tolerances (±5 %) and symmetric PCB layout minimize current imbalance. However, derating of 20–30 % per device is recommended due to minor parameter variation. For higher reliability, consider a single higher-rated device (e.g., 3.0KE36CA) instead of parallel 1.5KE36CA-E3/54 units unless board space or legacy design constraints require it.
1.5KE36CA-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:
- -
- Bidirectional Channels:
- 1
- 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
1.5KE36CA-E3/54 FAQ
1.How can I place an order for 1.5KE36CA-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE36CA-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 1.5KE36CA-E3/54 reliable?
The price and inventory of 1.5KE36CA-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 1.5KE36CA-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE36CA-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE36CA-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE36CA-E3/54?
1.5KE36CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE36CA-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 1.5KE36CA-E3/54?
For technical support, including 1.5KE36CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE36CA-E3/54 requirements.
6.How does Aetrix verify that 1.5KE36CA-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE36CA-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 1.5KE36CA-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE36CA-E3/54?
All 1.5KE36CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE36CA-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 1.5KE36CA-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE36CA-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE36CA-E3/54 Tags
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