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Vishay General Semiconductor - Diodes Division SMAJ36CAHE3/5A
- Part No.:
- SMAJ36CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ36CAHE3/5A.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,744
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Product details
Overview
SMAJ36CAHE3/5A 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 signal lines in automotive and industrial control systems.
For engineers reviewing the SMAJ36CAHE3/5A datasheet, SMAJ36CAHE3/5A pinout, SMAJ36CAHE3/5A application, or SMAJ36CAHE3/5A equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low incremental surge resistance, thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT assembly on standard PCB copper pad layouts.
Technical Context
This device operates as a voltage-clamping protector: under normal conditions it presents high impedance (>1 μA leakage at 36 V), but conducts rapidly when transient voltage exceeds VBR, limiting downstream voltage to ≤58.1 V. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns).
The SMAJ36CAHE3/5A is rated for repetitive 10/1000 μs surges at 0.01% duty cycle (400 W up to 78 V; derated to 300 W above), with maximum junction temperature of +150 °C and storage range from –55 °C to +150 °C. It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold. |
| VBR min/max | 40.0 V / 44.2 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 58.1 V at 6.9 A - Clamped voltage seen by protected circuit during 10/1000 μs surge; determines residual stress on downstream components. |
| PPPM | 400 W - Peak pulse power handling capacity with 10/1000 μs waveform; defines transient energy absorption limit. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports robustness against inductive switch-off events. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; guides PCB thermal design for reliability. |
| TJ max | +150 °C - Maximum allowable junction temperature; sets upper boundary for ambient + self-heating in continuous operation. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.50 mm × 2.79 mm × 2.29 mm (L × W × H), matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node in bidirectional operation | Connected to line being protected; forms symmetrical clamping path with cathode during either polarity transient. |
| Cathode | Current exit terminal in forward bias; common node in bidirectional operation | Paired with anode to provide identical clamping behavior for positive and negative transients; no band marking. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock per JEDEC standards. |
| 400 W peak pulse power (10/1000 μs) | Enables protection against high-energy transients such as ISO 7637-2 Pulse 1/2a/5a without derating in most board-level implementations. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on protected ICs - critical for 3.3 V or 5 V logic interfaces near sensitive analog front-ends. |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow soldering without moisture-related popcorning or delamination risks. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage stability across temperature and lifetime stress conditions. |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input Protection |
|---|---|
|
Use Scenario: Protecting microcontroller GPIOs and CAN transceiver pins from load dump and inductive kickback in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to shunt transients before reaching ESD-sensitive ICs. Use Value: Maintains system uptime by preventing latch-up or permanent damage during ISO 16750-2 load dump events (up to 35 V, 100 ms) and ISO 7637-2 pulses. |
Use Scenario: Shielding 24 V DC digital input channels in programmable logic controllers from relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Primary transient suppressor mounted adjacent to terminal block to absorb >1 kV/100 Ω ring wave and 10/700 μs telecom surges. Use Value: Eliminates need for external series impedance or RC snubbers while meeting IEC 61000-4-5 Level 3 (2 kV) immunity requirements. |
| Consumer Appliance Motor Drive Interface | Telecom Power Supply Input Stage |
|
Use Scenario: Safeguarding MCU-based motor control signals (e.g., PWM enable, direction) in washing machine or HVAC blower modules. IC Role / Device Role / Timing Role: Fast-response TVS placed between optocoupler output and gate driver input to prevent false triggering during brush-commutator noise bursts. Use Value: Reduces field return rates by blocking sub-100 ns EFT bursts (IEC 61000-4-4) that would otherwise corrupt logic states or reset microcontrollers. |
Use Scenario: Front-end protection for AC/DC adapter inputs subjected to lightning-induced surges on PoE or DSL line-powered equipment. IC Role / Device Role / Timing Role: Secondary-stage clamping device after MOV or GDT, providing precise low-VC holdover for downstream rectifier and controller ICs. Use Value: Limits peak voltage to 58.1 V during 10/1000 μs surges, enabling use of lower-voltage-rated bulk capacitors and reducing BOM cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CA-M3/5A | Same electrical specs and AEC-Q101 qualification; halogen-free molding compound instead of standard RoHS-compliant compound. | Required where halogen-free compliance is mandated (e.g., EU WEEE, specific OEM specs); identical thermal and clamping performance. | Select SMAJ36CA-M3/5A if halogen-free material content is required; otherwise SMAJ36CAHE3/5A offers full automotive qualification with standard RoHS compliance. |
| SMBJ36CAHE3/5A | Same VWM, VBR, and VC, but SMB (DO-214AA) package - 5.3 mm × 4.1 mm footprint, higher PPPM (600 W), RθJA = 80 °C/W. | Better thermal performance and surge margin; requires larger PCB area; not drop-in compatible due to different pad layout and body size. | Choose SMBJ36CAHE3/5A when higher surge endurance or improved thermal dissipation is needed; SMAJ36CAHE3/5A remains optimal for space-constrained automotive modules. |
Compared with SMAJ36CA-M3/5A, the SMAJ36CAHE3/5A uses standard RoHS-compliant packaging without halogen restrictions; compared with SMBJ36CAHE3/5A, it trades 200 W pulse power and 40 °C/W lower thermal resistance for 30% smaller PCB footprint - making it ideal for dense automotive ECUs where volume and weight are constrained.
Availability
SMAJ36CAHE3/5A is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, and consumer appliance motor control requiring stable component supply with AEC-Q101 traceability and 13" tape-and-reel delivery.
Supply support for SMAJ36CAHE3/5A 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, TVS devices, and optoelectronics with emphasis on reliability, precision, and automotive-grade validation.
The SMAJ series was developed specifically for high-reliability transient suppression in space-constrained automotive and industrial environments, balancing low-profile packaging, AEC-Q101 compliance, and consistent clamping performance across temperature and lifetime.
FAQ
What is the clamping voltage of the SMAJ36CAHE3/5A under a 10/1000 μs surge?
The SMAJ36CAHE3/5A has a maximum clamping voltage (VC) of 58.1 V at 6.9 A peak pulse current with a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 and defines the highest voltage imposed on protected circuitry during standardized surge testing. The SMAJ36CAHE3/5A maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C) and lifetime.
Is SMAJ36CAHE3/5A suitable for automotive applications?
Yes, SMAJ36CAHE3/5A is AEC-Q101 qualified and explicitly rated for automotive use, including body control modules, infotainment interfaces, and powertrain sensors. Its construction - glass-passivated junction, MSL Level 1 reflow compatibility, and guaranteed operation from –55 °C to +150 °C - meets stringent automotive environmental and reliability requirements. The "HE3" suffix confirms AEC-Q101 qualification per Vishay's ordering nomenclature.
What does the "CA" suffix mean in SMAJ36CAHE3/5A?
The "CA" suffix in SMAJ36CAHE3/5A denotes a bidirectional configuration: the device provides symmetrical transient suppression for both positive and negative voltage excursions, with identical VBR, VC, and leakage characteristics in either polarity. Unlike unidirectional "A" variants, SMAJ36CAHE3/5A has no cathode band marking and is used where AC-coupled or dual-polarity signal lines require protection without polarity constraints.
How does SMAJ36CAHE3/5A compare to SMAJ36AHE3/5A?
SMAJ36CAHE3/5A is bidirectional, while SMAJ36AHE3/5A is unidirectional - meaning the latter only clamps positive transients (anode-to-cathode) and conducts forward current up to 40 A (IFSM). SMAJ36CAHE3/5A supports clamping in both directions with no polarity marking, making it suitable for AC signal lines or differential buses. Both share identical VWM (36 V), VBR, VC, and package (SMA), but differ in conduction behavior and marking.
What PCB pad layout is recommended for SMAJ36CAHE3/5A?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad area per terminal for SMAJ36CAHE3/5A to achieve rated 400 W peak pulse power and thermal resistance (RθJA = 120 °C/W). The pad layout must follow DO-214AC outline dimensions: 4.50 mm length, 2.79 mm width, with 2.29 mm height clearance. Thermal vias under pads are recommended for high-reliability automotive designs to reduce steady-state junction temperature.
SMAJ36CAHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ36CAHE3/5A FAQ
1.How can I place an order for SMAJ36CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ36CAHE3/5A 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 SMAJ36CAHE3/5A reliable?
The price and inventory of SMAJ36CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ36CAHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ36CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ36CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ36CAHE3/5A?
SMAJ36CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ36CAHE3/5A 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 SMAJ36CAHE3/5A?
For technical support, including SMAJ36CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ36CAHE3/5A requirements.
6.How does Aetrix verify that SMAJ36CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ36CAHE3/5A 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 SMAJ36CAHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ36CAHE3/5A?
All SMAJ36CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ36CAHE3/5A, 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 SMAJ36CAHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ36CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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