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Vishay General Semiconductor - Diodes Division SMAJ36CAHE3_A/H
- Part No.:
- SMAJ36CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ36CAHE3_A/H.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ36CAHE3_A/H 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 - deployed in automotive sensor protection and industrial I/O interface circuits.
For engineers reviewing the SMAJ36CAHE3_A/H datasheet, SMAJ36CAHE3_A/H pinout, SMAJ36CAHE3_A/H application, or SMAJ36CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMA package supports high thermal dissipation via low RθJL (30 °C/W).
The device meets MSL Level 1 per J-STD-020 with 260 °C reflow peak, and its 150 °C max junction temperature enables operation in under-hood automotive environments. Clamping performance is specified at 6.9 A IPPM, delivering 58.1 V VC - critical for safeguarding 3.3 V/5 V/12 V logic interfaces against ISO 7637-2 pulse 1/2a/5a transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - maximum continuous reverse operating voltage before clamping begins; sets upper limit for normal circuit operation. |
| VBR min/max | 40.0 V / 44.2 V at 1 mA - guaranteed breakdown range defining turn-on threshold under transient stress. |
| VC @ IPPM | 58.1 V at 6.9 A - clamped voltage seen by protected IC during 10/1000 μs surge; determines residual stress on downstream components. |
| PPPM | 400 W - peak pulse power handling with 10/1000 μs waveform; defines transient energy absorption capacity. |
| ID @ VWM | 1.0 μA - reverse leakage at 36 V; ensures minimal standby power loss and signal integrity in high-impedance nodes. |
| TJ max | +150 °C - maximum junction temperature; enables use in engine control units and industrial motor drives. |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
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, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of symmetrical PN junction; accepts surge current from either direction during overvoltage events. |
| Cathode | Transient current exit (bidirectional) | Second terminal of symmetrical PN junction; completes low-impedance path to ground or return rail during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals, differential buses (e.g., RS-485, CAN), and ungrounded interfaces without polarity constraints. |
| 400 W peak pulse power | Handles ISO 7637-2 Pulse 5a (500 V/2 Ω) surges on 12 V systems with margin, supporting robust front-end protection in automotive ECUs. |
| AEC-Q101 qualified | Validated for automotive applications including temperature cycling (-55 °C to +150 °C), HTRB, and mechanical shock per AEC standard. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during transients - critical for protecting 3.3 V and 5 V microcontrollers and transceivers. |
| MSL Level 1, 260 °C peak | Compatible with standard lead-free reflow profiles; eliminates pre-baking requirements and simplifies manufacturing. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
|
Use Scenario: Protecting Hall-effect and temperature sensor outputs in engine control modules exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across sensor supply and ground pins to shunt transients before they reach precision ADC inputs. Use Value: Limits voltage excursion to ≤58.1 V during 100 V/500 ms load dump events, preserving sensor accuracy and preventing latch-up in 5 V analog front-ends. |
Use Scenario: Safeguarding 4–20 mA current loop receivers in programmable logic controllers subjected to field wiring surges. IC Role / Device Role / Timing Role: Placed across input terminals to absorb 1 kV/500 Ω ring wave transients per IEC 61000-4-5 Level 3. Use Value: Clamps induced spikes within 1 ns, maintaining signal integrity and avoiding false triggering of analog-to-digital conversion stages. |
| USB Type-C Port Protection | Telecom Line Interface |
|
Use Scenario: Secondary-level ESD and surge protection on VBUS and CC lines of automotive infotainment USB-C ports. IC Role / Device Role / Timing Role: Back-to-back TVS configuration (with additional unidirectional devices) to handle ±15 kV contact ESD and 10/1000 μs surges. Use Value: Withstands 400 W pulses while adding <1 pF capacitance - avoids signal degradation on high-speed USB 2.0 data lanes. |
Use Scenario: Overvoltage protection on telephone line interface cards in VoIP gateways exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Mounted across tip/ring pair to clamp common-mode transients up to 600 V without disrupting DC bias. Use Value: Maintains 36 V standoff while clamping to 58.1 V - compatible with SLIC operating ranges and prevents transformer saturation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CA-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No difference in automotive or industrial use; selected when halogen-free compliance is mandated by OEM spec. | Choose SMAJ36CAHE3_A/H for standard AEC-Q101 automotive programs; select SMAJ36CA-M3/61 only if halogen-free material is contractually required. |
| SMBJ36CAHE3_A/H | Same VWM/VBR/VC specs but in SMB (DO-214AA) package - 27% larger footprint, 600 W PPPM rating. | Higher power handling suits 24 V industrial systems with stronger surge threats; not drop-in due to different pad layout. | Use SMBJ36CAHE3_A/H where 600 W surge margin is needed and PCB space allows larger package; SMAJ36CAHE3_A/H remains optimal for space-constrained 12 V automotive modules. |
Compared with SMAJ36CA-M3/61, SMAJ36CAHE3_A/H offers identical protection performance with standard RoHS compliance; versus SMBJ36CAHE3_A/H, it trades 200 W pulse power for 30% smaller board area - making it the preferred choice for compact, cost-sensitive AEC-Q101 designs.
Availability
SMAJ36CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC analog input conditioning, and telecom line interface applications requiring stable component supply and AEC-Q101 traceability.
Supply support for SMAJ36CAHE3_A/H 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The SMAJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where fast-response, bidirectional clamping and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMAJ36CAHE3_A/H at its rated peak pulse current?
The SMAJ36CAHE3_A/H has a maximum clamping voltage (VC) of 58.1 V at 6.9 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring compatibility with 3.3 V, 5 V, and 12 V system rails. The SMAJ36CAHE3_A/H maintains this clamping performance across its full operating temperature range.
Is SMAJ36CAHE3_A/H suitable for automotive applications?
Yes, SMAJ36CAHE3_A/H is AEC-Q101 qualified and specifically designed for automotive use. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and mechanical shock per AEC standards. Its 150 °C maximum junction temperature, MSL Level 1 reflow rating, and bidirectional clamping make it appropriate for engine control units, body electronics, and ADAS sensor interfaces - all validated in the official Vishay qualification report for SMAJ36CAHE3_A/H.
What is the standoff voltage (VWM) and why does it matter for SMAJ36CAHE3_A/H?
The standoff voltage (VWM) of SMAJ36CAHE3_A/H is 36 V - the maximum continuous reverse voltage the device can block without entering breakdown. This parameter ensures the TVS remains non-conductive during normal operation, minimizing leakage (<1.0 μA) and avoiding interference with signal integrity or power efficiency. Selecting a VWM correctly above the system's maximum operating voltage (e.g., 33 V for a 36 V nominal automotive bus) prevents false triggering while retaining headroom for transients - a key design rule applied to SMAJ36CAHE3_A/H deployments.
How does the SMA package of SMAJ36CAHE3_A/H impact thermal performance?
The SMA (DO-214AC) package of SMAJ36CAHE3_A/H provides a thermal resistance of 30 °C/W from junction to lead (RθJL), enabling efficient heat transfer to PCB copper pads. When mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per Vishay recommendation, it sustains repetitive surge events without exceeding 150 °C junction temperature. This thermal behavior is integral to the 400 W peak pulse rating of SMAJ36CAHE3_A/H and distinguishes it from smaller SOD-123 packages with higher thermal resistance.
Does SMAJ36CAHE3_A/H have polarity markings, and how is it connected in circuit?
No, SMAJ36CAHE3_A/H has no polarity marking because it is a bidirectional TVS diode - constructed as two oppositely oriented avalanche diodes in series. It connects symmetrically across the protected line and return path (e.g., between CAN_H and CAN_L, or VBUS and GND), with either terminal serving as anode or cathode depending on transient polarity. This eliminates orientation errors during automated placement and simplifies layout for differential or floating signal paths - a core design feature of SMAJ36CAHE3_A/H.
SMAJ36CAHE3_A/H 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:
- -
- 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_A/H FAQ
1.How can I place an order for SMAJ36CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ36CAHE3_A/H 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_A/H reliable?
The price and inventory of SMAJ36CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ36CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ36CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ36CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ36CAHE3_A/H?
SMAJ36CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ36CAHE3_A/H 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_A/H?
For technical support, including SMAJ36CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ36CAHE3_A/H requirements.
6.How does Aetrix verify that SMAJ36CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ36CAHE3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ36CAHE3_A/H?
All SMAJ36CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ36CAHE3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for SMAJ36CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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