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Vishay General Semiconductor - Diodes Division SMAJ36CA-E3/5A
- Part No.:
- SMAJ36CA-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ36CA-E3/5A.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ36CA-E3/5A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features a 36 V standoff voltage (VWM), 40.0–44.2 V breakdown voltage (VBR) at 1 mA, 58.1 V maximum clamping voltage (VC) at 6.9 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMAJ36CA-E3/5A datasheet, SMAJ36CA-E3/5A pinout, SMAJ36CA-E3/5A application, or SMAJ36CA-E3/5A equivalent, key selection criteria include bidirectional clamping capability, 150 °C max junction temperature, MSL Level 1 moisture sensitivity, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS diode operates symmetrically in both polarities, with identical electrical characteristics forward and reverse. Its glass-passivated junction enables fast response time (<1 ps), low incremental surge resistance, and stable clamping under repetitive 10/1000 μs transients at 0.01% duty cycle.
The device is rated for 400 W peak pulse power up to 78 V; above that threshold, derated to 300 W. Thermal resistance is 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), requiring appropriate PCB copper area for sustained surge handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse operating voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR min/max | 40.0 V / 44.2 V at 1 mA - Confirmed breakdown range ensures reliable turn-on during overvoltage events without premature conduction |
| VC @ IPPM | 58.1 V at 6.9 A - Clamping voltage limits downstream component stress during 10/1000 μs surge; critical for IC-level protection |
| PPPM | 400 W - Peak pulse power handling with standard 10/1000 μs waveform; supports robust ESD and lightning-induced transient suppression |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates capability to survive inductive switch-off spikes |
| TJ max | +150 °C - Maximum junction temperature enables operation in under-hood automotive and high-temperature industrial environments |
| Package | SMA (DO-214AC) - Low-profile surface-mount outline compatible with standard SMT reflow profiles and automated pick-and-place |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; polarity unmarked for bidirectional types per datasheet note.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No polarity marking; terminals function identically in either direction - enables single-component protection of AC-coupled or floating signal lines |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables suppression of high-energy transients such as ISO 7637-2 Pulse 5a without thermal runaway when mounted on 5 mm × 5 mm copper pads |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during clamping - critical for protecting 3.3 V or 5 V logic interfaces downstream of the TVS |
| MSL Level 1, peak reflow 260 °C | Supports lead-free reflow soldering without preconditioning; eliminates moisture-related popcorning risk in production |
| Glass passivated junction | Ensures stable leakage current (<1.0 μA at VWM) and long-term reliability under thermal cycling and humidity exposure |
| AEC-Q101 qualified option available | HE3/HM3 variants meet automotive qualification - SMAJ36CA-E3/5A itself is commercial-grade but shares identical die and construction |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load dump and alternator ripple in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between power rail and ground, absorbing energy from >100 V transients within nanoseconds. Use Value: Limits voltage seen by downstream 5 V tolerant ICs to ≤58.1 V, preventing latch-up or gate oxide damage during ISO 16750-2 tests. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC analog input modules in factory automation. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor across signal line and reference ground, shunting induced surges from nearby motor drives. Use Value: Maintains signal integrity by clamping transients before they exceed ADC input absolute maximum ratings, avoiding measurement corruption or reset events. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
|
Use Scenario: Secondary-level protection on USB 2.0 VBUS and D+/D− lines in set-top boxes and smart displays against contact discharge per IEC 61000-4-2. IC Role / Device Role / Timing Role: Fast-response TVS placed after common-mode choke, clamping differential and common-mode ESD pulses simultaneously. Use Value: Achieves <±15 kV air / ±8 kV contact ESD immunity without degrading 480 Mbps signal integrity due to low junction capacitance (~200 pF at 0 V). |
Use Scenario: Front-end protection of ADSL/VDSL line interface circuits exposed to lightning-induced surges on outdoor copper pairs. IC Role / Device Role / Timing Role: Primary surge diverter installed before transformer coupling, rated for repeated 10/1000 μs transients per ITU-T K.20/K.21. Use Value: Withstands ≥328 A peak surge current (for SMAJ188A variant) - SMAJ36CA-E3/5A provides scalable protection for lower-voltage DSL PHY stages with tighter clamping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/5A | Unidirectional version; cathode band marked; same VWM, VBR, VC, and PPPM; forward conduction path only | Required where DC-biased lines need asymmetric clamping (e.g., +12 V supply rail to ground) | Select SMAJ36A-E3/5A only when circuit polarity is fixed and reverse conduction must be blocked |
| SMBJ36CA-E3/52 | Same electrical specs but in larger SMB (DO-214AA) package; 600 W PPPM rating; RθJA = 80 °C/W vs. 120 °C/W | Better thermal performance for high-duty-cycle or high-ambient-temperature deployments; occupies more board area | Choose SMBJ36CA-E3/52 when surge repetition rate exceeds 0.01% or ambient exceeds 85 °C with limited copper area |
Compared with SMAJ36CA-E3/5A, the unidirectional SMAJ36A-E3/5A adds polarity control but removes AC-line flexibility, while the SMBJ36CA-E3/52 trades footprint size for higher surge endurance and lower thermal resistance - making each suitable for distinct layout and reliability constraints.
Availability
SMAJ36CA-E3/5A is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, consumer USB power delivery circuits, and telecom line card designs requiring stable component supply and consistent surge performance across production batches.
Supply support for SMAJ36CA-E3/5A 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, precision, and application-specific optimization.
The SMAJ series is engineered for high-reliability transient suppression in space-constrained surface-mount applications - targeting automotive, industrial, and communications systems where robustness against ESD, EFT, and surge events is mandatory.
FAQ
What is the standoff voltage rating of the SMAJ36CA-E3/5A?
The SMAJ36CA-E3/5A has a maximum reverse standoff voltage (VWM) of 36 V. This value represents the highest continuous DC or RMS voltage the device can block without entering breakdown - ensuring no significant leakage current flows during normal operation while maintaining margin below its 40.0–44.2 V breakdown range. The SMAJ36CA-E3/5A is therefore suited for 24 V and 32 V nominal systems where transient headroom is required.
Does the SMAJ36CA-E3/5A have polarity markings on the package?
No, the SMAJ36CA-E3/5A does not feature polarity markings because it is a bidirectional TVS diode. As confirmed in the Vishay datasheet, bidirectional types like SMAJ36CA-E3/5A have symmetrical electrical behavior in both directions and no cathode band or other orientation indicators. This allows flexible placement on PCBs for AC-coupled or floating signal paths without concern for orientation - unlike unidirectional variants such as SMAJ36A-E3/5A, which include a visible cathode band.
What is the maximum clamping voltage of the SMAJ36CA-E3/5A under surge conditions?
The SMAJ36CA-E3/5A exhibits a maximum clamping voltage (VC) of 58.1 V at its rated peak pulse current (IPPM) of 6.9 A, measured using the standardized 10/1000 μs double-exponential waveform. This clamping level is guaranteed across temperature and production lot, and defines the upper voltage limit imposed on protected circuitry during transient events - making the SMAJ36CA-E3/5A appropriate for safeguarding 3.3 V, 5 V, and 24 V logic and power rails where overvoltage must remain below IC absolute maximum ratings.
Is the SMAJ36CA-E3/5A suitable for automotive applications?
The SMAJ36CA-E3/5A is RoHS-compliant and built on the same die and construction as AEC-Q101-qualified variants (e.g., SMAJ36CAHE3_A/I), but the -E3/5A suffix denotes commercial-grade qualification only. While widely deployed in automotive subsystems such as body control modules and infotainment power supplies, formal automotive use requires verification of qualification status per ordering code - the SMAJ36CAHE3_A/I or SMAJ36CAHM3_A/I versions are explicitly AEC-Q101 certified, whereas SMAJ36CA-E3/5A is not.
What is the thermal resistance of the SMAJ36CA-E3/5A, and how does it affect layout?
The SMAJ36CA-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value directly impacts sustained surge capability: higher ambient temperatures or insufficient copper area increase junction temperature rise, potentially derating peak pulse power. To maintain full 400 W rating, designers must adhere to the specified pad layout and avoid excessive trace length or isolation - the SMAJ36CA-E3/5A's thermal performance is optimized for standard SMT land patterns.
SMAJ36CA-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 6.9A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ36CA-E3/5A FAQ
1.How can I place an order for SMAJ36CA-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ36CA-E3/5A 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 SMAJ36CA-E3/5A reliable?
The price and inventory of SMAJ36CA-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ36CA-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ36CA-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ36CA-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ36CA-E3/5A?
SMAJ36CA-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ36CA-E3/5A 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 SMAJ36CA-E3/5A?
For technical support, including SMAJ36CA-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ36CA-E3/5A requirements.
6.How does Aetrix verify that SMAJ36CA-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ36CA-E3/5A 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 SMAJ36CA-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ36CA-E3/5A?
All SMAJ36CA-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ36CA-E3/5A, 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 SMAJ36CA-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ36CA-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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