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Vishay General Semiconductor - Diodes Division SMAJ90CA-E3/61
- Part No.:
- SMAJ90CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ90CA-E3/61.pdf
- Description:
- TVS DIODE 90VWM 146VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,284
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Product details
Overview
SMAJ90CA-E3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection of sensitive electronics. It features a 90 V standoff voltage (VWM), 100–111 V breakdown range (VBR), and clamps transients to ≤146 V at 2.1 A peak pulse current (IPPM), with 400 W peak pulse power (10/1000 μs waveform). It is widely deployed in automotive sensor signal lines, industrial I/O interfaces, and telecom power rails.
For engineers reviewing the SMAJ90CA-E3/61 datasheet, SMAJ90CA-E3/61 pinout, SMAJ90CA-E3/61 application, or SMAJ90CA-E3/61 equivalent, key selection criteria include bidirectional clamping behavior, SMA (DO-214AC) package compatibility, AEC-Q101 qualification status, and thermal resistance (RθJA = 120 °C/W) for board-level thermal design.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 μA leakage at 90 V), but triggers into low-impedance conduction when reverse (or forward, in bidirectional mode) voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and fast response (<1 ns).
The SMAJ90CA-E3/61 is rated for repetitive 10/1000 μs surge events at 0.01% duty cycle, delivering 400 W peak pulse power up to 78 V and 300 W above - confirmed by Fig. 1 derating curve. Its unidirectional counterpart SMAJ90A shares identical VWM, VBR, and IPPM specs but differs in polarity marking and circuit integration requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold |
| VBR min/max | 100 V / 111 V at 1 mA - Confirmed breakdown range ensuring reliable triggering across process variation and temperature |
| VC @ IPPM | ≤146 V at 2.1 A - Clamping voltage during 10/1000 μs surge; determines maximum stress imposed on protected IC or MOSFET |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - Peak surge energy handling capacity; defines survivability against lightning-induced or inductive-switching transients |
| IFSM | 40 A - Single half-sine surge rating (8.3 ms); supports short-duration fault currents without bond-wire fusing |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; critical for steady-state power dissipation (PD = 3.3 W) |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or industrial ambient environments |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Case meets UL 94 V-0 flammability rating; matte tin-plated leads comply with J-STD-002 solderability and JESD 22-B102 whisker testing (Class 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node for bidirectional clamping path | Connected to line being protected; forms symmetrical conduction path with cathode during either polarity surge |
| Cathode | Current exit terminal in forward bias; second terminal of bidirectional clamping structure | Typically tied to ground or reference rail; completes low-impedance shunt path during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| 400 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) when properly laid out on PCB |
| AEC-Q101 qualified option (HE3/HM3 suffix) | SMAJ90CA-E3/61 itself is commercial-grade; HE3 variant provides validated reliability for automotive ECUs and ADAS sensors |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD >15 kV contact discharge) |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Sensor Protection | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and MEMS pressure sensor outputs from load-dump and jump-start transients in engine control modules. IC Role / Device Role / Timing Role: Shunt TVS diode placed between signal line and chassis ground, clamping spikes within nanoseconds. Use Value: Limits induced voltage to ≤146 V, preventing latch-up or gate oxide damage in 5 V or 3.3 V interface ICs per ISO 7637-2 Pulse 5a/b. |
Use Scenario: Safeguarding 4–20 mA current-loop inputs in programmable logic controllers exposed to field wiring faults and relay coil flyback. IC Role / Device Role / Timing Role: Bidirectional clamp across input terminals, absorbing ±1 kV/500 A surge per IEC 61000-4-5. Use Value: Maintains analog front-end integrity by holding differential voltage below ADC input absolute maximum ratings during surge events. |
| Telecom Power Rail Protection | Consumer USB Port ESD Suppression |
Use Scenario: Guarding -48 V DC telecom power distribution boards against lightning-induced surges entering via long cable runs. IC Role / Device Role / Timing Role: Primary shunt protector on bulk supply rail, coordinated with upstream MOVs and downstream polymer PTCs. Use Value: Absorbs 300 W surge energy at 78–188 V range while maintaining <1 μA leakage at nominal -48 V operation. |
Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D− lines in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Low-capacitance (CJ ≈ 100 pF at 0 V) bidirectional clamp placed adjacent to connector. Use Value: Clamps ±15 kV HBM ESD pulses to <20 V peak while adding <0.5 dB insertion loss at 480 MHz - preserving signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90A-E3/61 | Unidirectional; cathode band marked; same VWM/VBR/VC/PPPM specs | Requires correct polarity orientation; suitable only for DC-biased or ground-referenced lines | Select when protecting single-polarity rails (e.g., +12 V supply) where reverse conduction is not required |
| SMBJ90CA-E3/52 | Same electrical specs but SMB (DO-214AA) package; 1.5× larger pad area; RθJA = 85 °C/W | Higher surge current rating (IPPM = 3.3 A); better thermal performance; occupies more PCB area | Choose for higher-reliability industrial designs needing >2.1 A surge margin or improved thermal headroom |
Compared with SMAJ90CA-E3/61, the unidirectional SMAJ90A-E3/61 requires careful layout alignment but offers identical clamping performance on polarized lines, while the SMBJ90CA-E3/52 trades compactness for enhanced surge handling and thermal derating capability - making it preferable in high-temperature or high-energy environments.
Availability
SMAJ90CA-E3/61 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC analog inputs, and telecom power rail applications requiring stable component supply, RoHS-compliant sourcing, and consistent tape-and-reel delivery.
Supply support for SMAJ90CA-E3/61 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, precision, and application-specific optimization.
The SMAJ series was engineered for high-energy transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and communications systems where robustness and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of SMAJ90CA-E3/61 at its rated peak pulse current?
The SMAJ90CA-E3/61 clamps to a maximum of 146 V when subjected to its specified peak pulse current of 2.1 A (10/1000 μs waveform). This value is measured per Figure 1 and Table 1 in Vishay Document 88390 and represents the upper limit of voltage seen by downstream circuitry during a standardized surge event. The actual clamping voltage of SMAJ90CA-E3/61 may be lower depending on test conditions and PCB layout parasitics.
Is SMAJ90CA-E3/61 suitable for automotive applications?
SMAJ90CA-E3/61 is RoHS-compliant and manufactured in Vishay's commercial-grade line. While it shares the same electrical and mechanical specifications as AEC-Q101-qualified variants (e.g., SMAJ90CAHE3_A), the "E3" suffix indicates it is not certified for automotive use. For automotive applications, specify SMAJ90CAHE3_A or SMAJ90CAHM3_A - the SMAJ90CA-E3/61 itself is intended for industrial and telecom systems where AEC-Q101 is not mandated.
How does the bidirectional nature of SMAJ90CA-E3/61 affect its placement on the PCB?
The SMAJ90CA-E3/61 has no polarity marking and conducts symmetrically in both directions, allowing placement between any two nodes requiring bidirectional overvoltage protection - such as across differential signal pairs, AC-coupled lines, or floating power domains. Unlike unidirectional TVS diodes, SMAJ90CA-E3/61 eliminates orientation errors during automated assembly and simplifies layout for balanced protection schemes.
What is the maximum steady-state power dissipation for SMAJ90CA-E3/61?
The SMAJ90CA-E3/61 has a maximum steady-state power dissipation (PD) of 3.3 W at 50 °C ambient temperature with infinite heatsink conditions. In typical surface-mount applications using 0.2" × 0.2" copper pads per terminal, derating applies above 25 °C per Figure 2; at 70 °C ambient, usable PD drops to approximately 2.2 W. This rating governs continuous leakage-related heating, not transient surge energy - the SMAJ90CA-E3/61 handles far higher energy in short pulses.
Does SMAJ90CA-E3/61 meet any industry surge immunity standards?
The SMAJ90CA-E3/61 is designed to support compliance with IEC 61000-4-5 (surge immunity) and IEC 61000-4-2 (ESD immunity) when integrated into a system-level protection scheme. Its 400 W peak pulse power (10/1000 μs) aligns with Level 4 (4 kV line-earth) requirements under IEC 61000-4-5, provided PCB layout follows Vishay's recommended pad dimensions and grounding practices. The SMAJ90CA-E3/61 itself is not certified to these standards - validation occurs at the end-equipment level.
SMAJ90CA-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 146V
- Current - Peak Pulse (10/1000µs):
- 2.1A
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ90CA-E3/61 FAQ
1.How can I place an order for SMAJ90CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ90CA-E3/61 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 SMAJ90CA-E3/61 reliable?
The price and inventory of SMAJ90CA-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ90CA-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ90CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ90CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ90CA-E3/61?
SMAJ90CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ90CA-E3/61 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 SMAJ90CA-E3/61?
For technical support, including SMAJ90CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ90CA-E3/61 requirements.
6.How does Aetrix verify that SMAJ90CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ90CA-E3/61 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 SMAJ90CA-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ90CA-E3/61?
All SMAJ90CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ90CA-E3/61, 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 SMAJ90CA-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ90CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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