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Vishay General Semiconductor - Diodes Division SMAJ36CAHM3_A/I
- Part No.:
- SMAJ36CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ36CAHM3_A/I.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,998
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Product details
Overview
SMAJ36CAHM3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection of sensitive electronics. It features a 36 V stand-off 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 on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMAJ36CAHM3_A/I datasheet, SMAJ36CAHM3_A/I pinout, SMAJ36CAHM3_A/I application, or SMAJ36CAHM3_A/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 μA leakage at 36 V), but triggers into low-impedance conduction when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and fast response (<1 ns), while the bidirectional structure eliminates polarity dependency in AC-coupled or floating signal paths.
The device complies with ANSI/IEEE C62.35 surge standards and delivers repeatable clamping performance across -55 °C to +150 °C junction temperature range. Its thermal resistance (RθJA = 120 °C/W) and 3.3 W steady-state power dissipation are defined for PCB mounting on minimum recommended pad layout per JEDEC MO-213.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - maximum continuous reverse operating voltage before significant leakage begins |
| VBR min/max | 40.0 V / 44.2 V at 1 mA - guaranteed breakdown window defining turn-on consistency |
| VC @ IPPM | 58.1 V at 6.9 A - clamping voltage limiting downstream component stress during 10/1000 μs transients |
| PPPM | 400 W - peak surge power handling capability with standard lightning/surge waveform |
| ID @ VWM | 1.0 μA - ultra-low reverse leakage preserving signal integrity and battery life |
| TJ max | +150 °C - extended junction temperature rating enabling under-hood automotive use |
| MSL Level | Level 1 (J-STD-020) - no floor life limitation; safe for reflow without baking |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, with matte tin-plated leads solderable per J-STD-002. Bidirectional construction means no polarity marking; both terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (negative half-cycle) | Conducts surge current toward ground during negative-going transients; identical behavior to Cathode terminal |
| Cathode | Transient current sink (positive half-cycle) | Conducts surge current toward ground during positive-going transients; identical behavior to Anode terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| 400 W peak pulse power | Withstands IEC 61000-4-5 surge events up to 4 kV (open-circuit) without degradation |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during clamping, reducing risk of downstream IC latch-up or damage |
| MSL Level 1 rating | Enables direct placement into high-volume SMT lines without moisture-sensitive handling protocols |
| Glass passivated junction | Ensures long-term parameter stability and resistance to humidity-induced parameter drift |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs in automotive body control modules against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between VBAT and GND, clamping surges within nanoseconds. Use Value: Limits voltage to ≤58.1 V during 400 W transients, preventing damage to MCU, CAN transceivers, and power management ICs. | Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA, 0–5 V) of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional clamp on differential or single-ended signal lines exposed to ESD and inductive switching noise. Use Value: Maintains signal fidelity with <1 μA leakage at 36 V while suppressing ±15 kV HBM ESD and 1 kV EFT bursts. |
| Telecom Interface Protection | Consumer USB Port Protection |
Use Scenario: Shielding RS-485 transceiver I/O pins in base station backhaul equipment from lightning-induced surges. IC Role / Device Role / Timing Role: Symmetrical TVS pair (one per line) referenced to common-mode ground, absorbing common-mode transients. Use Value: Clamps differential and common-mode surges to <60 V, preserving data integrity and preventing transceiver latch-up. | Use Scenario: Adding secondary-level surge immunity to USB 2.0 D+/D− lines in smart home hubs and docking stations. IC Role / Device Role / Timing Role: Bidirectional shunt protector placed after primary ESD array, handling higher-energy transients. Use Value: Withstands 400 W surges while adding <1 pF junction capacitance - negligible impact on 480 Mbps signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36CAHE3_A/I | Same electrical specs; RoHS-compliant but not halogen-free; lacks HM3 halogen-free certification | Approved for commercial-grade automotive and industrial use, but not for halogen-free compliance mandates | Select when halogen-free requirement is not enforced and cost optimization is prioritized |
| SMAJ36CAHM3_A/H | Identical electrical and mechanical specs; differs only in tape-and-reel packaging (1800 pcs vs. 7500 pcs per reel) | No functional difference; choice depends solely on production volume and feeder compatibility | Select for low-to-mid volume prototyping or small-batch assembly where 7" reels are preferred |
Compared with SMAJ36CAHM3_A/I, the HE3 variant omits halogen-free compliance but offers identical surge performance and AEC-Q101 qualification, while the HM3_A/H differs only in reel size - making SMAJ36CAHM3_A/I optimal for high-volume halogen-free automotive programs requiring traceability and large-reel efficiency.
Availability
SMAJ36CAHM3_A/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and telecom infrastructure surge hardening requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMAJ36CAHM3_A/I 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 and automotive-grade validation.
The SMAJ series is engineered specifically for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping, low leakage, and AEC-Q101 compliance are mandatory.
FAQ
What does the "HM3" suffix indicate in SMAJ36CAHM3_A/I?
The "HM3" suffix denotes halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance, and AEC-Q101 qualification. It distinguishes SMAJ36CAHM3_A/I from non-halogen-free variants like HE3, confirming compliance with strict environmental and automotive reliability standards required in modern vehicle platforms.
Is SMAJ36CAHM3_A/I suitable for bidirectional signal line protection?
Yes, SMAJ36CAHM3_A/I is explicitly designed for bidirectional operation - its CA suffix confirms symmetrical clamping in both polarities. This makes it ideal for protecting AC-coupled, differential, or floating signal paths such as RS-485, CAN FD, or sensor analog outputs where polarity cannot be assumed.
What is the maximum clamping voltage of SMAJ36CAHM3_A/I under surge conditions?
The maximum clamping voltage (VC) of SMAJ36CAHM3_A/I is 58.1 V at 6.9 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is guaranteed across temperature and lifetime, ensuring predictable overvoltage limiting for downstream components like microcontrollers and transceivers.
Does SMAJ36CAHM3_A/I require special PCB layout considerations?
Yes - Vishay specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 400 W pulse power. Smaller pads reduce thermal dissipation and may derate PPPM; thermal vias and ground plane connectivity are recommended for sustained surge duty cycles.
How does SMAJ36CAHM3_A/I differ from unidirectional SMAJ36A variants?
SMAJ36CAHM3_A/I provides symmetrical clamping for both positive and negative transients, whereas unidirectional SMAJ36AHM3_A/I clamps only in reverse bias and conducts forward current like a rectifier. The CA version eliminates need for polarity awareness in layout and supports AC or floating node protection without external diode pairing.
SMAJ36CAHM3_A/I 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ36CAHM3_A/I FAQ
1.How can I place an order for SMAJ36CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ36CAHM3_A/I 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 SMAJ36CAHM3_A/I reliable?
The price and inventory of SMAJ36CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ36CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ36CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ36CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ36CAHM3_A/I?
SMAJ36CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ36CAHM3_A/I 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 SMAJ36CAHM3_A/I?
For technical support, including SMAJ36CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ36CAHM3_A/I requirements.
6.How does Aetrix verify that SMAJ36CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ36CAHM3_A/I 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 SMAJ36CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ36CAHM3_A/I?
All SMAJ36CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ36CAHM3_A/I, 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 SMAJ36CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMAJ36CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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