My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KE36CA-E3/51
- Part No.:
- 1.5KE36CA-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE36CA-E3/51.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,180
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE36CA-E3/51 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for clamping voltage transients on 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, and 1500 W peak pulse power rating with 10/1000 µs waveform - used in automotive sensor protection and industrial I/O interface surge hardening.
For engineers reviewing the 1.5KE36CA-E3/51 datasheet, 1.5KE36CA-E3/51 pinout, 1.5KE36CA-E3/51 application, or 1.5KE36CA-E3/51 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, bidirectional clamping behavior, thermal derating curves, and RoHS-compliant commercial-grade sourcing guidance.
Technical Context
This device operates as a silicon avalanche diode with glass-passivated junction, delivering symmetrical clamping in both polarities due to its bidirectional CA suffix configuration. Its 10/1000 µs waveform response enables sub-nanosecond transient suppression, and it maintains stable VBR temperature coefficient of 0.099 %/°C across -55 °C to +175 °C operating range.
The 1.5KE36CA-E3/51 exhibits low incremental surge resistance and excellent clamping ratio (VC/VBR ≈ 1.39), enabling reliable protection of downstream MOSFETs and ICs against inductive switching spikes and lightning-induced surges. It is rated for 6.5 W steady-state power dissipation at 75 °C lead temperature and supports 200 A non-repetitive forward surge (unidirectional only - not applicable here due to bidirectional polarity).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 34.2 V to 37.8 V at 1 mA - defines precise voltage threshold where avalanche conduction begins in either direction |
| VWM | 30.8 V maximum - ensures no conduction during normal operation up to rated working voltage |
| VC at IPPM | 49.9 V at 30.1 A - limits worst-case transient voltage seen by protected circuitry |
| PPPM | 1500 W - sustains high-energy transients per IEEE/ANSI C62.35 10/1000 µs standard |
| Junction Temp Range | -55 °C to +175 °C - supports under-hood automotive and industrial ambient conditions |
| Package | JEDEC DO-201AD (Case Style 1.5KE) - industry-standard axial-leaded through-hole package with 0.375" lead length |
| RoHS Compliance | E3 suffix - meets JESD 201 Class 1A whisker test and UL 94 V-0 flammability rating |
Pinout & Package
1.5KE36CA-E3/51 uses the JEDEC DO-201AD axial-leaded package (Case Style 1.5KE), with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Bidirectional construction means no polarity marking; both terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Either terminal serves as clamping node - no cathode band; identical behavior in both directions |
| Lead 1 / Lead 2 | Mounting & thermal path | Leads conduct heat to PCB copper; RθJL = 15.4 °C/W enables effective power dissipation into board traces |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable long-term VBR performance and humidity resistance in harsh environments |
| 1500 W peak pulse power | Handles high-energy transients such as ISO 7637-2 Pulse 5a without degradation |
| Bidirectional clamping | Protects AC-coupled or floating signal lines without polarity concerns - e.g., RS-485, CAN bus stubs |
| Sub-nanosecond response | Clamps transients within 1 ns, faster than MOVs or GDTs, preserving signal integrity in high-speed interfaces |
| UL 94 V-0 molding compound | Prevents flame propagation in safety-critical enclosures per industrial and automotive standards |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting wheel speed sensor outputs exposed to load dump and alternator ripple in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential sensor pair to clamp ±50 V transients before they reach analog front-end amplifier. Use Value: Prevents latch-up or gate oxide damage in downstream op-amps and ADCs while maintaining signal fidelity below 30.8 V nominal operation. | Use Scenario: Shielding 24 V DC digital input modules from relay coil flyback and ESD events in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff-connected TVS on each input channel to shunt >1 kV transients directly to common ground before reaching optocoupler input stage. Use Value: Enables >100,000 insertion cycles without degradation and eliminates need for external series impedance in cost-sensitive discrete I/O designs. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Safeguarding Ethernet PHY magnetics secondary side against induced surges from nearby AC wiring in PoE-powered devices. IC Role / Device Role / Timing Role: Bidirectional clamping device across transformer center-tap and ground to suppress common-mode transients on data pairs. Use Value: Maintains <1 pF parasitic capacitance impact on 100BASE-TX eye diagram while meeting IEC 61000-4-5 Level 3 immunity requirements. | Use Scenario: Suppressing commutation spikes from universal motor brushes in washing machine control boards. IC Role / Device Role / Timing Role: Across AC line inputs to snub 600 V+ inductive kickback generated during TRIAC zero-cross switching. Use Value: Extends MCU GPIO lifetime by limiting transient coupling into microcontroller power rails and reset circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | DO-214AA package, lower 600 W PPPM, 55.2 V VC at 10.9 A | Suitable for space-constrained PCBs but requires higher layout trace width for same energy handling | Select when board area is limited and peak transient energy is ≤600 W |
| 1.5SMC36CA | SMD DO-214AB package, same 1500 W rating, 55.2 V VC at 27.1 A | Enables automated assembly but has higher thermal resistance (RθJA ≈ 110 °C/W vs. 75 °C/W) | Choose for reflow-compatible designs where thermal management via heatsinking is impractical |
Compared with 1.5KE36CA-E3/51, SMBJ36CA trades peak power and clamping performance for compactness, while 1.5SMC36CA retains full 1500 W capability in SMD form but demands more careful thermal design due to reduced heat-spreading efficiency.
Availability
1.5KE36CA-E3/51 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and appliance motor control circuits requiring stable component supply, long-lifecycle support, and RoHS-compliant procurement.
Supply support for 1.5KE36CA-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, MOSFETs, and protection devices with emphasis on reliability and automotive qualification.
The 1.5KE family was engineered for high-energy transient suppression in demanding environments, targeting applications where robustness, repeatable clamping, and JEDEC-standard through-hole mounting are essential.
FAQ
What is the clamping voltage of the 1.5KE36CA-E3/51 under maximum rated surge current?
The 1.5KE36CA-E3/51 clamps to 49.9 V at its peak pulse current of 30.1 A, measured using the standardized 10/1000 µs waveform. This value is guaranteed per Vishay's datasheet Document Number 88301 and reflects worst-case voltage imposed on protected circuitry during transient events. The clamping ratio (VC/VBR) remains tightly controlled at ~1.39, ensuring predictable protection margins for downstream components interfacing with the 1.5KE36CA-E3/51.
Is the 1.5KE36CA-E3/51 suitable for automotive applications?
The 1.5KE36CA-E3/51 is rated for operation from -55 °C to +175 °C and meets UL 94 V-0 flammability requirements, making it suitable for under-hood and cabin automotive environments. While the base E3 suffix denotes commercial grade, AEC-Q101 qualified variants exist (e.g., 1.5KE36CAHE3_B); users requiring automotive qualification must specify the HE3 suffix. The 1.5KE36CA-E3/51 itself is widely deployed in non-safety-critical automotive subsystems like body control modules and sensor interfaces where robust transient immunity is required.
How does the bidirectional nature of the 1.5KE36CA-E3/51 affect its placement in circuit design?
The 1.5KE36CA-E3/51 has no polarity marking and conducts identically in both directions, allowing direct placement across AC-coupled lines, transformer windings, or differential pairs without orientation concerns. Unlike unidirectional TVS diodes, it eliminates risk of incorrect installation and simplifies layout for balanced interfaces such as RS-485, CAN, or Ethernet magnetics. Its symmetrical VBR and VC ensure equal protection against positive and negative transients - a key advantage when protecting floating or dual-rail signal paths with the 1.5KE36CA-E3/51.
What is the thermal resistance profile of the 1.5KE36CA-E3/51, and how does it impact PCB layout?
The 1.5KE36CA-E3/51 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W and junction-to-ambient (RθJA) of 75 °C/W. Effective thermal management requires maximizing copper area connected to both leads - minimum 0.375" (9.5 mm) lead length is specified for power derating curves. For continuous 6.5 W dissipation, PCB traces must act as heatsinks; reducing trace width or shortening leads increases junction temperature and reduces surge endurance. Layout best practice for the 1.5KE36CA-E3/51 is wide, short, double-sided copper pours tied to both terminals.
Can the 1.5KE36CA-E3/51 be used in parallel to increase surge current handling?
Yes, multiple 1.5KE36CA-E3/51 units can be paralleled to increase total peak pulse current capacity, but matching VBR tolerance (±5 %) is critical to ensure current sharing. Vishay recommends using devices from the same reel or lot code to minimize imbalance; mismatched units may cause one device to absorb disproportionate energy and fail prematurely. Parallel use also increases total junction capacitance, which must be evaluated for high-frequency signal integrity - especially relevant when deploying the 1.5KE36CA-E3/51 in data line protection schemes.
1.5KE36CA-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:
- -
- 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-E3/51 FAQ
1.How can I place an order for 1.5KE36CA-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE36CA-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 1.5KE36CA-E3/51 reliable?
The price and inventory of 1.5KE36CA-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 1.5KE36CA-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE36CA-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE36CA-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE36CA-E3/51?
1.5KE36CA-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE36CA-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 1.5KE36CA-E3/51?
For technical support, including 1.5KE36CA-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE36CA-E3/51 requirements.
6.How does Aetrix verify that 1.5KE36CA-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE36CA-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 1.5KE36CA-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE36CA-E3/51?
All 1.5KE36CA-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE36CA-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 1.5KE36CA-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE36CA-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE36CA-E3/51 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
