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Diodes Incorporated SMAJ36AQ-13-F
- Part No.:
- SMAJ36AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ36AQ-13-F.pdf
- Description:
- TVS DIODE 36VWM 58.1VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:7,900
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Product details
Overview
SMAJ36AQ-13-F from Diodes Incorporated is a unidirectional 400W automotive transient voltage suppressor (TVS) diode with 36V reverse standoff voltage, 58.1V max clamping voltage at 6.9A peak pulse current, and AEC-Q101 qualification. It protects CAN bus, LIN, and body control modules against ISO7637-2 Pulse 1 (−100V), Pulse 2a (+50V), and ISO10605 ESD (±30kV contact/air discharge).
For engineers reviewing the SMAJ36AQ-13-F datasheet, SMAJ36AQ-13-F pinout, SMAJ36AQ-13-F application, or SMAJ36AQ-13-F equivalent, this device serves as a primary surge protection component in 12V/24V automotive power rails where precise clamping, low leakage (<0.5µA @ 36V), and IATF 16949 traceability are required.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp in series with automotive power inputs, activating only during negative transients exceeding its 36V VRWM and clamping to ≤58.1V within nanoseconds. Its glass-passivated die ensures stable breakdown and low capacitance for high-speed signal integrity.
Designed for ISO7637-2 compliance, it withstands −100V (Pulse 1), +50V (Pulse 2a), and −150V/+100V (Pulses 3a/3b) waveforms while maintaining <0.5µA reverse leakage at rated standoff. Thermal operation spans −55°C to +175°C junction temperature, supporting under-hood deployment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 10×1000µs surges without failure in automotive load-dump scenarios |
| Reverse Standoff Voltage (VRWM) | 36V - blocks normal 12V/24V system voltages while remaining fully inactive below threshold |
| Max Clamping Voltage (VC) | 58.1V @ IPP = 6.9A - limits downstream IC voltage stress during ISO7637-2 Pulse 1 (−100V) |
| Breakdown Voltage (VBR) | 40.0–44.2V @ IT = 1.0mA - ensures reliable, repeatable avalanche initiation with tight tolerance |
| Reverse Leakage (IR) | <0.5µA @ 36V - prevents parasitic drain in always-on vehicle modules (e.g., alarm, telematics) |
| Operating Temperature | −55°C to +175°C TJ - enables placement near engines, ECUs, and battery junction boxes |
| AEC-Q101 Qualified | Yes - validated for automotive use with PPAP documentation and IATF 16949 manufacturing control |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic UL 94V-0 housing; cathode band denotes anode-to-cathode polarity for unidirectional operation; moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input return path for transient energy | Connected to ground or low-impedance chassis return; completes clamping loop during negative surges |
| Cathode | Protected line connection | Connected to 12V/24V supply rail upstream of protected ICs; conducts avalanche current when VRWM exceeded |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Ensures stable VBR over lifetime and resistance to humidity-induced parameter shift in engine bay environments |
| Lead-free, halogen-free "Green" finish | Meets RoHS 3 (2015/863/EU) and automotive ELV Directive; <900ppm Br, <900ppm Cl, <1000ppm Sb |
| Low clamping ratio (VC/VBR ≈ 1.45) | Delivers tighter overvoltage protection than standard Zener-based TVS, reducing margin needed for downstream ICs |
| 5,000-piece tape-and-reel packaging | Enables high-throughput SMT assembly with verified reel integrity and ESD-safe carrier design |
Applications
| Body Control Module (BCM) | CAN FD Transceiver Protection |
|---|---|
|
Use Scenario: 12V power input to BCM managing door locks, lighting, and window motors. IC Role / Device Role / Timing Role: Unidirectional TVS placed between fuse output and DC-DC converter input. Use Value: Clamps ISO7637-2 Pulse 1 (−100V) to ≤58.1V, preventing latch-up or burnout of buck controller ICs. |
Use Scenario: Protection of high-speed CAN FD data lines (2 Mbps) in ADAS domain controllers. IC Role / Device Role / Timing Role: TVS on VCC rail feeding isolated CAN transceivers (e.g., TCAN1042HV). Use Value: Sub-1ns response preserves signal edge integrity while suppressing coupled power-rail transients from nearby solenoid switching. |
| Start-Stop Battery Monitoring | Electric Power Steering (EPS) ECU |
|
Use Scenario: Voltage monitoring circuit powered directly from lead-acid battery with frequent cranking events. IC Role / Device Role / Timing Role: Primary surge clamp on 3.3V LDO input derived from 12V rail. Use Value: Withstands repetitive 50V pulses (ISO7637-2 Pulse 2a) without degradation, ensuring ADC reference stability. |
Use Scenario: 24V auxiliary supply rail in EPS systems exposed to motor regeneration spikes. IC Role / Device Role / Timing Role: TVS on gate driver supply input upstream of MOSFET half-bridge. Use Value: Limits voltage overshoot to <60V during 100V Pulse 3b events, preventing unintended MOSFET turn-on or gate oxide stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-13-F | No AEC-Q101 qualification; RoHS-compliant but not PPAP-capable; same electrical specs | Acceptable for non-safety-critical consumer or industrial 12V systems; not approved for OEM automotive BOMs | Select only if AEC-Q101 documentation and IATF 16949 traceability are not required |
| SMBJ36AQ-13-F | Same VRWM and VC, but 600W PPK rating in SMB package; higher thermal mass and lower RθJA | Better suited for high-duty-cycle surge environments (e.g., alternator load dump with >10 pulses/min) | Choose when board layout allows SMB footprint and thermal derating margins are constrained |
Compared with SMAJ36A-13-F, the AQ variant adds mandatory automotive change control and full PPAP support; versus SMBJ36AQ-13-F, it trades 200W peak power headroom for smaller SMA footprint and lower profile-ideal for space-constrained ECUs.
Availability
SMAJ36AQ-13-F is available at Aetrix Electronics and suitable for automotive body electronics, infotainment power supplies, and ADAS sensor interface circuits requiring stable component supply with full AEC-Q101 traceability and zero-lot-risk sourcing.
Supply support for SMAJ36AQ-13-F 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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions, with core expertise in protection, power management, and signal integrity devices.
The SMAJ(AQ) series is part of Diodes' Automotive TVS portfolio, engineered specifically for ISO7637-2 and ISO10605 compliance in harsh-temperature vehicle subsystems-from lighting modules to zonal ECUs.
FAQ
What is the maximum peak pulse current (IPP) for SMAJ36AQ-13-F?
The maximum peak pulse current is 6.9A under the standardized 10×1000µs waveform (per Figure 4 in DS40739 Rev. 17-2). This value is measured at clamping voltage VC = 58.1V and defines the highest transient energy the device can safely divert without parametric shift or failure.
Is SMAJ36AQ-13-F bidirectional or unidirectional?
SMAJ36AQ-13-F is unidirectional, indicated by the absence of the "C" suffix in its marking code (JP) and the presence of a cathode band on the SMA package. It clamps only negative transients relative to its cathode terminal and must be oriented with cathode toward the protected supply rail.
Does this TVS diode require a heatsink in typical automotive applications?
No heatsink is required. At TA = +25°C, its steady-state power dissipation is limited to 1.0W, and its thermal resistance (RθJA) is sufficient for PCB copper pour alone. Derating curves (Figure 6) confirm safe operation up to TL = +75°C with standard 1 oz. copper land patterns.
How does SMAJ36AQ-13-F differ from industrial-grade SMAJ36A-13-F?
The "AQ" suffix denotes full AEC-Q101 qualification, IATF 16949 manufacturing, PPAP documentation, and controlled change management-required for Tier 1 automotive BOMs. The industrial "A" version lacks these certifications and is not approved for safety-critical vehicle functions.
SMAJ36AQ-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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:
- SMA
SMAJ36AQ-13-F FAQ
1.How can I place an order for SMAJ36AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ36AQ-13-F 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 SMAJ36AQ-13-F reliable?
The price and inventory of SMAJ36AQ-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ36AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ36AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ36AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ36AQ-13-F?
SMAJ36AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ36AQ-13-F 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 SMAJ36AQ-13-F?
For technical support, including SMAJ36AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ36AQ-13-F requirements.
6.How does Aetrix verify that SMAJ36AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ36AQ-13-F 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 SMAJ36AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ36AQ-13-F?
All SMAJ36AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ36AQ-13-F, 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 SMAJ36AQ-13-F part is unused and in its original packaging.
Return procedure for SMAJ36AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ36AQ-13-F Tags
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