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Vishay General Semiconductor - Diodes Division SMAJ110CAHE3/61
- Part No.:
- SMAJ110CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ110CAHE3/61.pdf
- Description:
- TVS DIODE 110VWM 177VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,469
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Product details
Overview
SMAJ110CAHE3/61 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 110 V standoff voltage (VWM), 122–135 V breakdown voltage (VBR) at 1 mA, clamps transients to ≤177 V at 1.7 A peak pulse current (IPPM), and delivers 400 W peak pulse power (10/1000 μs waveform). It is AEC-Q101 qualified and used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power systems.
For engineers reviewing the SMAJ110CAHE3/61 datasheet, SMAJ110CAHE3/61 pinout, SMAJ110CAHE3/61 application, or SMAJ110CAHE3/61 equivalent, this page provides verified electrical parameters, bidirectional clamping behavior, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), and direct replacement guidance for automotive-grade TVS selection.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, VWM, and IPPM specifications in forward and reverse directions. Its glass-passivated junction ensures stable avalanche performance and low leakage (<1.0 μA at VWM), while the low incremental surge resistance enables precise clamping under fast transients.
The device is rated for 400 W peak pulse power up to 78 V and derates to 300 W above that threshold. It meets MSL Level 1 per J-STD-020, supports lead-free reflow up to 260 °C peak, and is qualified to AEC-Q101 for automotive underhood and powertrain applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 110 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 12 V/24 V/48 V bus systems. |
| VBR (min/max) | 122 V / 135 V at 1 mA - Confirmed bidirectional breakdown range; ensures reliable triggering during ESD or load-dump events. |
| VC @ IPPM | ≤177 V at 1.7 A - Clamped voltage under 10/1000 μs surge; limits stress on downstream MOSFETs or microcontrollers. |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - Peak pulse power handling; supports repetitive surge immunity in automotive CAN/LIN lines. |
| IFSM | 40 A - Non-repetitive forward surge rating (8.3 ms half-sine); validates robustness against battery reverse-connection faults. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in engine control units and power inverters without derating. |
| RθJA | 120 °C/W - Thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; informs heatsinking requirements for sustained surge duty. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Accepts surge current from either polarity; connects to protected line (e.g., CAN_H or LIN bus). |
| Cathode | Transient current exit (bidirectional) | Completes low-impedance path to ground or reference rail; requires low-inductance PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive powertrain and body electronics; supports PPAP documentation and long-term reliability in 150 °C environments. |
| 400 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surges without degradation when mounted per recommended pad layout. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage overshoot during fast transients; protects 120 V-rated gate drivers and isolated ADC front-ends. |
| MSL Level 1, 260 °C reflow compatible | Enables single-pass SMT assembly with standard lead-free profiles; eliminates moisture sensitivity concerns pre-reflow. |
| Glass passivated junction | Ensures stable VBR tolerance (±5 % typical), low leakage (<1 μA), and repeatable clamping over 1000+ surge cycles. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V supply rails in engine control modules (ECMs) against load dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional clamping device placed between battery input and DC-DC converter input stage. Use Value: Limits voltage to ≤177 V during 100 V/300 ms load dump events, preventing damage to 200 V-rated buck controllers. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Low-capacitance TVS on 0–10 V or 4–20 mA signal lines exposed to relay switching noise. Use Value: Clamps 1 kV ESD (IEC 61000-4-2) and 400 V ring wave (IEC 61000-4-12) transients within <1 ns, preserving signal integrity. |
| Telecom DC Power Feeding | Motor Drive Gate Driver Protection |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras, access points) receiving 48 V DC over twisted-pair cabling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on PSE-side DC feed line before isolation transformer or DC-DC stage. Use Value: Absorbs 400 W surges induced by cable coupling or lightning-induced common-mode spikes without latch-up. |
Use Scenario: Protecting high-side/low-side gate drivers in BLDC motor inverters from shoot-through-induced voltage spikes. IC Role / Device Role / Timing Role: Bidirectional clamp across gate-source terminals of 600 V SiC MOSFETs. Use Value: Suppresses >100 V ringing transients (dV/dt > 50 V/ns) during hard switching, preventing false turn-on and gate oxide failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ110CA-M3/61 | Halogen-free, RoHS-compliant, commercial grade (non-AEC-Q101) | Lacks automotive qualification; suitable for industrial/commercial power supplies where AEC-Q101 is not mandated | Select when cost-sensitive non-automotive designs require same clamping performance without automotive certification overhead |
| SMCJ110CAHE3/61 | Same VWM/VBR, but SMC (DO-214AB) package; 1500 W PPPM, higher IPPM (13.7 A), RθJA = 40 °C/W | Higher surge capacity and better thermal dissipation; requires larger PCB footprint (7.11 mm × 6.22 mm vs. SMA's 4.5 mm × 2.79 mm) | Choose for high-reliability 12 V/24 V battery systems needing >10× surge margin, accepting larger board area |
Compared with SMAJ110CAHE3/61, SMAJ110CA-M3/61 offers identical electrical specs but no AEC-Q101 validation, while SMCJ110CAHE3/61 trades compact size for 3.75× higher surge power and superior thermal performance-enabling longer surge endurance in space-constrained automotive modules.
Availability
SMAJ110CAHE3/61 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom power feeding, and motor drive gate protection requiring stable component supply with full AEC-Q101 traceability.
Supply support for SMAJ110CAHE3/61 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, efficiency, and automotive-grade qualification.
The SMAJ series is engineered specifically for high-speed, high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where consistent clamping, low leakage, and AEC-Q101 compliance are mandatory.
FAQ
What is the maximum clamping voltage of SMAJ110CAHE3/61 under a 10/1000 μs surge?
The SMAJ110CAHE3/61 clamps to a maximum of 177 V when subjected to its rated peak pulse current of 1.7 A using the standardized 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024, Document Number 88390. The clamping voltage directly determines the overvoltage stress imposed on downstream components like gate drivers or microcontrollers during surge events.
Is SMAJ110CAHE3/61 suitable for automotive applications?
Yes, SMAJ110CAHE3/61 is AEC-Q101 qualified, making it suitable for automotive applications including engine control units, body control modules, and ADAS power supplies. Its HE3 suffix explicitly denotes RoHS-compliant and AEC-Q101 qualified construction. The device operates from −55 °C to +150 °C and withstands automotive-specific transients such as ISO 7637-2 load dump and ISO 16750-2 supply voltage variations.
What is the standoff voltage (VWM) and why does it matter for SMAJ110CAHE3/61?
The standoff voltage (VWM) of SMAJ110CAHE3/61 is 110 V - the maximum continuous DC or RMS voltage the device can block without entering avalanche conduction. This parameter ensures the TVS remains inactive during normal operation (e.g., 95 V battery transients in 24 V systems), avoiding leakage-related power loss or false triggering. Exceeding VWM risks premature conduction and accelerated wear.
How does the bidirectional design of SMAJ110CAHE3/61 affect circuit placement?
The bidirectional design of SMAJ110CAHE3/61 means it has no polarity marking and functions identically in both directions - ideal for protecting AC-coupled lines, differential buses (e.g., CAN, RS-485), or ungrounded power rails. Unlike unidirectional TVS diodes, SMAJ110CAHE3/61 can be placed without regard to anode/cathode orientation, simplifying layout and reducing assembly errors in high-volume automotive PCBs.
What thermal considerations apply to SMAJ110CAHE3/61 in continuous operation?
SMAJ110CAHE3/61 has a junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" copper pads. Under continuous DC bias near VWM, power dissipation is minimal (<1 mW), but during surge events, transient self-heating must be managed via adequate copper area and spacing. For repeated surges, thermal cycling life is validated per AEC-Q101, and PCB layout must avoid thermal bottlenecks near the SMAJ110CAHE3/61 body.
SMAJ110CAHE3/61 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):
- 110V
- Voltage - Breakdown (Min):
- 122V
- Voltage - Clamping (Max) @ Ipp:
- 177V
- Current - Peak Pulse (10/1000µs):
- 1.7A
- Power - Peak Pulse:
- 300W
- 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)
SMAJ110CAHE3/61 FAQ
1.How can I place an order for SMAJ110CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ110CAHE3/61 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 SMAJ110CAHE3/61 reliable?
The price and inventory of SMAJ110CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ110CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ110CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ110CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ110CAHE3/61?
SMAJ110CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ110CAHE3/61 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 SMAJ110CAHE3/61?
For technical support, including SMAJ110CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ110CAHE3/61 requirements.
6.How does Aetrix verify that SMAJ110CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ110CAHE3/61 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 SMAJ110CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ110CAHE3/61?
All SMAJ110CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ110CAHE3/61, 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 SMAJ110CAHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ110CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ110CAHE3/61 Tags
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