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Vishay General Semiconductor - Diodes Division 1.5KE36A-E3/51
- Part No.:
- 1.5KE36A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE36A-E3/51.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,279
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Product details
Overview
1.5KE36A-E3/51 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a 34.2 V minimum breakdown voltage (VBR), 30.8 V maximum working peak reverse voltage (VWM), 49.9 V clamping voltage (VC) at 30.1 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and operates across –55 °C to +175 °C junction temperature range - deployed in automotive power supply inputs and industrial sensor interface protection.
For engineers reviewing the 1.5KE36A-E3/51 datasheet, 1.5KE36A-E3/51 pinout, 1.5KE36A-E3/51 application, or 1.5KE36A-E3/51 equivalent, this page delivers verified electrical parameters, JEDEC-standard 1.5KE package dimensions, polarity marking convention, clamping performance under surge conditions, and direct alternatives with documented parameter divergence - all validated against Vishay Document #88301 (Rev. 09-Aug-2022).
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time (<1 ns) and low incremental surge resistance, enabling effective suppression of fast-rising transients from inductive switching or ESD events. Its 1500 W peak pulse power rating is defined per 10/1000 µs waveform with 0.01 % duty cycle, and it maintains stable clamping performance up to 175 °C junction temperature.
The device exhibits a 0.099 %/°C temperature coefficient of VBR, ensuring predictable voltage threshold drift across operating temperature. With 1.0 mA test current (IT) and 1.0 µA maximum reverse leakage at VWM, it supports low-power standby circuits while delivering robust transient immunity in 24 V industrial control systems and automotive body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 34.2 V / 37.8 V at 1.0 mA - defines precise voltage threshold where clamping initiates; critical for matching system overvoltage tolerance margins. |
| VWM | 30.8 V - maximum continuous reverse voltage before leakage exceeds 1.0 µA; sets safe operating limit for 24 V nominal rail protection. |
| VC @ IPPM | 49.9 V at 30.1 A - clamped voltage during 1500 W transient; determines maximum stress imposed on downstream ICs during surge. |
| PPPM | 1500 W (10/1000 µs) - peak surge energy handling capacity; enables protection against ISO 7637-2 Pulse 1/2a/5a in automotive environments. |
| IFSM | 200 A (8.3 ms half-sine) - non-repetitive forward surge rating; supports single-event load dump survival in 12 V/24 V vehicle systems. |
| TJ Range | –55 °C to +175 °C - extended thermal capability allows placement near heat sources (e.g., power MOSFETs) without derating loss. |
| Package | JEDEC DO-201AD (Case Style 1.5KE) - axial-leaded, epoxy-molded package with UL 94 V-0 flammability rating and matte tin-plated leads. |
Pinout & Package
1.5KE36A-E3/51 is housed in a DO-201AD (Case Style 1.5KE) axial-leaded package. The cathode is marked by a color band on the body; no marking is present on bidirectional variants. 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 conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge events like load dump. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 24 V rail); avalanche breakdown occurs here when VWM is exceeded, shunting surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repetitive surge stress. |
| 1500 W peak pulse power (10/1000 µs) | Supports high-energy transient suppression without degradation - meets ISO 16750-2 and SAE J1113-11 requirements. |
| Sub-nanosecond response time | Clamps transients within <1 ns, preventing voltage overshoot from reaching sensitive logic or analog circuitry. |
| Low incremental surge resistance | Minimizes VC – VBR differential, reducing let-through energy and improving protection margin for 3.3 V/5 V ICs. |
| AEC-Q101 qualification option (HE3 suffix) | Available in automotive-grade variant (1.5KE36AHE3_B); this E3/51 version is commercial grade per JESD201 Class 1A whisker testing. |
Applications
| Automotive Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting 24 V power input stage of body control module against load dump and jump-start transients per ISO 7637-2. IC Role / Device Role / Timing Role: Primary clamping element placed between battery rail and upstream DC/DC converter input. Use Value: Limits peak voltage to ≤49.9 V during 30.1 A surge, preventing damage to 36 V-rated input capacitors and controller ICs. |
Use Scenario: Shielding 24 V digital input channels of programmable logic controllers from field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Unidirectional shunt protector mounted at connector entry point, upstream of optocoupler or level-shifter. Use Value: Clamps transients before they reach isolation barrier, preserving signal integrity and extending optocoupler lifetime. |
| Telecom Line Interface Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding RS-485 transceivers and PHY components on remote terminal units connected to long outdoor cabling. IC Role / Device Role / Timing Role: Secondary protection device following gas discharge tube (GDT), absorbing residual energy after GDT fires. Use Value: Provides low-clamping-voltage follow-on protection with 49.9 V ceiling, compatible with ±12 V transceiver common-mode range. |
Use Scenario: Suppressing back-EMF spikes generated by brushed DC motors in washing machine control boards during commutation. IC Role / Device Role / Timing Role: Mounted across motor terminals to clamp inductive kickback before it couples into MCU GPIO or driver ICs. Use Value: Absorbs 1500 W pulses without failure, eliminating need for snubber RC networks and reducing BOM count. |
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), 600 W PPPM, 58.1 V VC @ 10.3 A - lower power rating and higher clamping voltage than 1.5KE36A-E3/51. | Preferred for space-constrained PCBs where 1500 W is not required; unsuitable for ISO 7637-2 Pulse 5a compliance. | Select SMBJ36A only if board layout prohibits axial-leaded devices and surge energy remains below 600 W. |
| 1.5KE36CA | Bidirectional variant (same VBR/VC specs), symmetric clamping for AC-coupled or floating signal lines; lacks cathode band marking. | Required for protecting differential bus lines (e.g., CAN, RS-485) where polarity reversal may occur; not usable on DC rails with defined ground reference. | Choose 1.5KE36CA only when protecting bidirectional signals; 1.5KE36A-E3/51 remains optimal for unidirectional DC rail protection. |
Compared with SMBJ36A, 1.5KE36A-E3/51 delivers 2.5× higher surge power handling and 8.2 V lower clamping voltage - critical for protecting 36 V-rated front-end regulators. Against 1.5KE36CA, it offers superior DC rail compatibility via explicit polarity marking and optimized unidirectional leakage behavior.
Availability
1.5KE36A-E3/51 is available at Aetrix Electronics and suitable for automotive power input protection, industrial PLC digital I/O hardening, and telecom line interface safeguarding requiring stable component supply and full traceability.
Supply support for 1.5KE36A-E3/51 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, TVS devices, and power MOSFETs with emphasis on reliability and ruggedness.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where sustained surge immunity and thermal stability are mandatory.
FAQ
What is the clamping voltage of the 1.5KE36A-E3/51 under maximum rated surge current?
The 1.5KE36A-E3/51 clamps to 49.9 V at its rated peak pulse current of 30.1 A (10/1000 µs waveform). This value is measured per JEDEC standard test conditions and represents the maximum voltage seen across the device during a full 1500 W transient event - directly determining the stress level imposed on downstream components in the protected circuit.
Is the 1.5KE36A-E3/51 RoHS compliant and lead-free?
Yes, the 1.5KE36A-E3/51 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and exemption 7a. Its matte tin-plated leads meet J-STD-002 solderability requirements and pass JESD 201 Class 1A whisker testing, confirming suitability for lead-free reflow and wave soldering processes.
Does the 1.5KE36A-E3/51 have AEC-Q101 qualification?
No, the 1.5KE36A-E3/51 is a commercial-grade part. AEC-Q101 qualified versions carry the "HE3" suffix (e.g., 1.5KE36AHE3_B). While the 1.5KE36A-E3/51 shares identical electrical specifications and construction, it has not undergone the extended stress testing required for automotive qualification.
How is polarity identified on the 1.5KE36A-E3/51 package?
The 1.5KE36A-E3/51 uses a color band (typically black or dark gray) on the cathode end of the DO-201AD axial package. This band must be oriented toward the positive side of the protected line (e.g., 24 V rail), with the anode connected to ground or return path - reversing polarity prevents clamping action and risks device failure.
What is the thermal resistance from junction to ambient for the 1.5KE36A-E3/51?
The typical junction-to-ambient thermal resistance (RθJA) of the 1.5KE36A-E3/51 is 75 °C/W under standard mounting conditions (lead length = 0.375", free air). This value assumes no heatsinking; actual thermal performance improves significantly when leads are soldered to copper pour or when used with PCB thermal vias.
1.5KE36A-E3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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-E3/51 FAQ
1.How can I place an order for 1.5KE36A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE36A-E3/51 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-E3/51 reliable?
The price and inventory of 1.5KE36A-E3/51 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-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE36A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE36A-E3/51 transactions.
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1.5KE36A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE36A-E3/51 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-E3/51?
For technical support, including 1.5KE36A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE36A-E3/51 requirements.
6.How does Aetrix verify that 1.5KE36A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE36A-E3/51 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-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE36A-E3/51?
All 1.5KE36A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE36A-E3/51, 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-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE36A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE36A-E3/51 Tags
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