SMAJ36CA-Q

SMAJ36CA-Q is an automotive-grade transient voltage suppressor (TVS) diode in a SMA (DO-214AC) package. It’s used to protect electronics from voltage transients on 24–28 V automotive/industrial rails (load dumps, inductive spikes, ESD).
Key points:
- Rating: standoff voltage around 33–36 V; clamps higher with current (typical clamp in the tens of volts range at low currents, higher at surge); high peak pulse power capability (varies by pulse width).
- Qualification: The -Q suffix denotes automotive/AEC-qualified status (robust, suitable for harsher environments).
- Package: compact SMA surface-mount diode, easy to place on boards.
- Applications: protects DC power rails, CAN/LIN, data lines, USB, and other interfaces in 12–28 V systems.
Choosing:
- Match V_RWM (working reverse voltage) to your system’s nominal voltage.
- Check V_CL (clamping) and I_PP (peak pulse current) for the expected transients.
- Use -Q parts for automotive designs.

SMAJ36CA-Q features (concise):
- 36V bidirectional TVS diode (CA suffix indicates bidirectional)
- Automotive qualified with Q suffix (AEC-Q101 compliant) for reliability in vehicles
- DO-214AC (SMA) surface-mount package
- Ultra-fast transient protection for power and signal lines
- Wide operating temperature range suitable for automotive environments
- High surge/peak pulse capability and low clamping for protection
- RoHS compliant and designed for rugged, long-term reliability in harsh conditions
Note: Provides robust protection against inductive spikes, load dumps, ESD, and other transients on 36V rails.

- Pin count: 2 (two-terminal device in DO-214AC SMA package)
- Function: Automotive-grade transient voltage suppressor (TVS) diode used to clamp voltage transients/surges on a line (ESD/surge protection) with a 36 V rating in the SMAJ36CA-Q variant.

- Manufacturer: Littelfuse, Inc.
- What kind of company: A global American electronics firm specializing in circuit protection products, including fuses, TVS diodes, surge protectors, and related protection devices.

SMAJ36CA-Q is an automotive-qualified 36V TVS diode. Common application areas:
- Automotive 12/24V power rails: suppress load-dump, inductive kick, and surges on the main supply
- Automotive ECUs, sensors, telematics, infotainment, battery-management systems
- Protection of I/O and data lines (CAN/LIN, PWM, SPI, GPIO) from voltage spikes
- Harsh-environment automotive and industrial equipment with 24V/48V DC networks
- External connectors protection and ESD/surge protection for rugged interfaces
Note: “Q” indicates AEC-Q-qualified automotive reliability.

SMAJ36CA-Q uses the SMA package (DO-214AC), a surface-mount transient-voltage-suppressor package.