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Vishay General Semiconductor - Diodes Division 1.5KE36A/54
- Part No.:
- 1.5KE36A/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE36A/54.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,887
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Product details
Overview
1.5KE36A from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-side overvoltage protection in DC power rails 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, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5KE36A datasheet, 1.5KE36A pinout, 1.5KE36A application, or 1.5KE36A equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, and direct alternatives for circuit protection design-in and BOM optimization.
Technical Context
The 1.5KE36A operates as a silicon avalanche diode with glass-passivated junction, delivering sub-nanosecond response time (<1 ns) to transient events. Its unidirectional polarity uses a cathode band marking and exhibits 3.5 V forward voltage at 100 A, with thermal resistance of 15.4 °C/W (junction-to-lead) and 75 °C/W (junction-to-ambient).
It is rated for -55 °C to +175 °C operating junction temperature, supports 200 A non-repetitive forward surge current (8.3 ms half-sine), and complies with JEDEC standards for transient suppression. The device is RoHS-compliant (E3 suffix) and available in AEC-Q101-qualified variants (HE3 suffix) for automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 34.2 V / 37.8 V at 1 mA - defines reliable avalanche initiation threshold for overvoltage detection |
| VWM | 30.8 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 49.9 V at 30.1 A - clamped voltage during 1500 W transient, limiting stress on downstream components |
| PPPM | 1500 W (10/1000 µs) - peak surge energy handling capacity without failure |
| IFSM | 200 A (8.3 ms half-sine) - single-event surge current capability for inductive load switching |
| TJ max. | +175 °C - enables operation in high-temperature environments such as engine compartments or industrial power supplies |
| RθJL | 15.4 °C/W - low thermal resistance allows effective heat conduction through leads during repetitive surges |
Pinout & Package
Package: DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body meeting UL 94 V-0 flammability rating. Matte tin-plated leads 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 reference in unidirectional clamp configuration |
| Cathode | Avalanche conduction terminal / protected line connection | Marked with color band; connects to line being protected (e.g., 24 V rail, RS-485 bus) |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| 1500 W peak pulse power | Supports robust protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges without degradation |
| <1 ns response time | Clamps transients before sensitive logic or analog circuitry experiences damaging overvoltage |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD, relay bounce) |
| AEC-Q101 qualified option | Validated for automotive powertrain and body electronics per stress test requirements |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and feedback sensing circuits against voltage spikes from contactor switching and regenerative braking. IC Role / Device Role: Unidirectional TVS placed across DC bus input and isolated signal lines to clamp transients below MOSFET VDSS and op-amp absolute maximum ratings. Use Value: Prevents cumulative degradation of SiC/GaN driver ICs by limiting transient energy to <1500 W with 49.9 V clamping ceiling. | Use Scenario: Surge suppression on LIN bus lines and power inputs of door module ECUs exposed to load dump and jump-start conditions. IC Role / Device Role: Primary overvoltage clamp on 12 V supply rail and bidirectional data lines (with CA variant), leveraging low leakage (<1 µA at 30.8 V) to avoid sleep-mode current penalties. Use Value: Maintains system wake-up integrity by holding leakage below 1 µA while surviving 200 A surge pulses per ISO 7637-2 Pulse 5a. |
| Telecom Power Feeds | Consumer Appliance Control Boards |
Use Scenario: Input-stage protection for PoE-powered equipment and remote DSLAM power feeds subjected to induced lightning surges on outdoor copper pairs. IC Role / Device Role: First-line defense on primary DC input, coordinated with upstream fuses and downstream ceramic capacitors to absorb 10/1000 µs transients per ITU-T K.20/K.21. Use Value: Achieves 1500 W surge rating with 49.9 V clamping to keep downstream DC-DC converters within safe operating area during multi-kV events. | Use Scenario: Overvoltage hardening of microcontroller I/O pins and relay coil flyback paths in washing machine and HVAC control boards. IC Role / Device Role: Discrete TVS mounted directly at connector entry points and inductive load terminals to suppress 600 V/30 A transients from brushed motor commutation. Use Value: Eliminates field failures caused by >1000 V transients by clamping within 1 ns and dissipating full energy without parametric shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ36A | Same 36 V VWM, but lower PPPM = 400 W; DO-214AC package (SMA) vs. DO-201AD | Lower surge capacity limits use to consumer-grade, non-industrial applications | Select when board space is constrained and surge threat level is ≤IEC 61000-4-5 Level 2 |
| ON Semiconductor 1.5SMC36A | Identical VBR/VC specs and DO-214AB (SMC) package; 1500 W rating, but RθJL = 18.5 °C/W (higher thermal resistance) | Slightly reduced thermal performance may require derating above 75 °C ambient | Prefer for SMC-mount designs where lead-forming is impractical and thermal margin ≥10 °C exists |
Compared with 1.5KE36A, SMAJ36A offers smaller footprint but sacrifices 73 % peak power handling, while 1.5SMC36A matches power rating but trades higher thermal resistance for surface-mount compatibility - making 1.5KE36A optimal for high-reliability through-hole designs requiring maximum surge margin and thermal headroom.
Availability
1.5KE36A is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and consumer appliance control boards requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE36A 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 qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments, targeting applications demanding 1500 W surge capability, wide temperature operation (-55 °C to +175 °C), and AEC-Q101 compliance for automotive electronics.
FAQ
What is the clamping voltage of the 1.5KE36A under maximum rated surge current?
The 1.5KE36A clamps to 49.9 V at its peak pulse current of 30.1 A (10/1000 µs waveform). This value is measured per JEDEC standard and ensures downstream components see no more than 49.9 V during a full 1500 W transient event. The clamping ratio (VC/VBR) is approximately 1.38, confirming tight voltage control essential for protecting 3.3 V or 5 V logic interfaces when used with appropriate series impedance.
Is the 1.5KE36A suitable for automotive applications?
Yes - the 1.5KE36A is available in an AEC-Q101-qualified version designated 1.5KE36AHE3_B. This variant undergoes stress testing per automotive reliability standards including temperature cycling, humidity bias HAST, and surge endurance. Standard 1.5KE36A-E3 units are commercial grade; only HE3-suffixed parts are certified for automotive under-hood or body electronics use.
How does the 1.5KE36A differ from bidirectional TVS diodes like 1.5KE36CA?
The 1.5KE36A is unidirectional and features a cathode band marking, intended for DC line protection where polarity is fixed. In contrast, 1.5KE36CA is bidirectional with symmetrical clamping in both directions and no polarity marking - used for AC lines or differential buses like RS-485. Their VBR, VC, and PPPM are identical, but 1.5KE36CA cannot replace 1.5KE36A in polarized circuits without risking forward conduction.
What is the maximum allowable junction temperature for continuous operation of the 1.5KE36A?
The 1.5KE36A has a maximum junction temperature (TJ) rating of +175 °C, verified per JEDEC test conditions. For continuous DC operation, thermal design must ensure junction temperature remains below this limit using the specified RθJA = 75 °C/W and RθJL = 15.4 °C/W values. Derating begins above 25 °C ambient, with power dissipation dropping linearly to zero at 175 °C per Figure 5 in the Vishay datasheet 88301.
Can the 1.5KE36A be used in parallel to increase surge current handling?
No - the 1.5KE36A should not be paralleled without external current-sharing resistors or matched VBR bins. Due to manufacturing tolerances (±5 % on VBR), paralleling bare devices causes uneven current distribution, risking thermal runaway in the unit with lowest breakdown voltage. For higher surge capacity, select a higher-rated part (e.g., 3.0KE36A) or use a TVS array with integrated matching.
1.5KE36A/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:
- 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/54 FAQ
1.How can I place an order for 1.5KE36A/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE36A/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/54 reliable?
The price and inventory of 1.5KE36A/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/54 is usually 5 days.
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Once your 1.5KE36A/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/54?
For technical support, including 1.5KE36A/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE36A/54 requirements.
6.How does Aetrix verify that 1.5KE36A/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE36A/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/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE36A/54?
All 1.5KE36A/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE36A/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/54 part is unused and in its original packaging.
Return procedure for 1.5KE36A/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE36A/54 Tags
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