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Microchip Technology SMAJ90CAE3/TR13
- Part No.:
- SMAJ90CAE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ90CAE3/TR13.pdf
- Description:
- TVS DIODE 90VWM 146VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,004
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Product details
Overview
SMAJ90CAE3/TR13 from Microsemi is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in DO-214AC (SMA) package, rated for 500 W peak pulse power at 10/1000 µs, with 90 V standoff voltage (VWM), 100 V minimum breakdown voltage (VBR), and 160 V maximum clamping voltage (VC) at 3.1 A peak pulse current - deployed for ESD/EFT protection in industrial power supplies and telecom interface circuits.
For engineers reviewing the SMAJ90CAE3/TR13 datasheet, SMAJ90CAE3/TR13 pinout, SMAJ90CAE3/TR13 application, or SMAJ90CAE3/TR13 equivalent, key selection criteria include bidirectional clamping behavior, IEC61000-4-2/4-4/4-5 compliance, RoHS-compliant matte-tin plating, and compatibility with standard SMA footprint on FR4 PCBs with 1 oz copper.
Technical Context
This device operates as a symmetrical avalanche diode, delivering sub-5 ns response time for bidirectional transients without polarity dependence. Its clamping action begins at VBR ≥ 100 V under 1 mA test current and sustains ≤ 160 V across 3.1 A IPP, enabling robust secondary lightning protection per IEC61000-4-5 with 42 Ω source impedance (Class 1).
Thermal performance is defined by 15 °C/W junction-to-lead resistance and 80 °C/W junction-to-ambient when mounted on recommended FR4 footprint; steady-state dissipation is 1.56 W at 25 °C ambient or 5 W at 75 °C lead temperature - supporting continuous operation in high-reliability embedded power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe working range for 90 V DC bus protection. |
| VBR min @ IBR | 100 V @ 1 mA - Minimum avalanche breakdown threshold; ensures predictable turn-on margin above VWM. |
| VC @ IPP | 160 V @ 3.1 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to <160 V under worst-case transient. |
| PPP | 500 W - Peak pulse power handling capability; supports high-energy surges common in industrial power input stages. |
| IPP | 3.1 A - Peak pulse current corresponding to VC = 160 V; used to size series impedance for IEC61000-4-5 Class 1 compliance. |
| ID @ VWM | 3.1 µA - Reverse leakage at 90 V; negligible loading on 90 V bias networks, preserving signal integrity and efficiency. |
| Operating Temp | −65 °C to +150 °C - Full military-grade temperature range; validated for automotive under-hood and industrial control cabinet use. |
Pinout & Package
DO-214AC (SMA) surface-mount package with void-free thermosetting epoxy body (UL94V-0), C-bend leads, matte-tin RoHS-compliant plating, and cathode band omitted (bidirectional symmetry). Weight: 0.064 g. Moisture sensitivity level: Level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient path | No polarity marking; either terminal serves as input or return path - simplifies layout in AC-coupled or floating interfaces. |
| Case / Body | Thermal conduction path | Direct thermal coupling to PCB copper pour via wide leads; enables 15 °C/W junction-to-lead dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses (e.g., RS-485), or floating power domains without polarity constraints. |
| IEC61000-4-5 Class 1 compliance | Validated for secondary lightning surges with 42 Ω source impedance up to 90 V VWM, eliminating need for external series impedance in many designs. |
| RoHS-compliant "e3" termination | Matte-tin plating meets J-STD-020B Level 1 moisture sensitivity and MIL-STD-750 solderability requirements - no pre-bake needed. |
| Fast response time | <5 ns clamping onset for bidirectional transients - faster than most microcontroller GPIO protection thresholds and analog front-end recovery windows. |
| 500 W peak pulse rating | Supports high-energy switching noise (e.g., relay coil flyback, motor drive commutation) without degradation over >10,000 cycles. |
Applications
| Industrial Power Input Protection | Telecom Interface Surge Suppression |
|---|---|
Use Scenario: 90 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and inductive kickback. IC Role / Device Role / Timing Role: Primary clamping element limiting transient voltage seen by upstream DC-DC controller and downstream LDOs. Use Value: Clamps 500 W surges to ≤160 V, preventing latch-up or gate oxide damage in 100 V-rated MOSFETs and controllers. |
Use Scenario: RS-485 transceiver bus lines in outdoor base station equipment subjected to ESD and induced RF coupling. IC Role / Device Role / Timing Role: Bidirectional line protector placed directly at connector, shunting transients before reaching PHY IC pins. Use Value: Sub-5 ns response ensures clamping occurs before transceiver ESD diodes activate, reducing cumulative stress on integrated protection. |
| Automotive Body Control Module | Medical Equipment Signal Isolation Barrier |
Use Scenario: 12 V–90 V auxiliary power rail in BCM exposed to ISO 7637-2 pulse 1/2a/3a transients during vehicle cranking and alternator load dump. IC Role / Device Role / Timing Role: Secondary TVS staged after primary LC filter, absorbing residual energy that passes filtering. Use Value: Withstands −65 °C to +150 °C operation and 100% temperature cycling per avionics screening option (MA prefix), meeting AEC-Q200 stress requirements. |
Use Scenario: Isolated CAN or SPI data lines crossing patient-connected medical device boundaries, requiring reinforced insulation and low leakage. IC Role / Device Role / Timing Role: Bidirectional transient limiter on isolated side of digital isolator, protecting downstream ADC or MCU inputs. Use Value: 3.1 µA standby current at 90 V avoids loading isolation barrier leakage paths, maintaining creepage/clearance safety margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90CA | Same electrical specs and DO-214AC package, but non-RoHS tin-lead plating; no "e3" suffix. | Not suitable for RoHS-compliant production; requires leaded solder process and fails IPC-J-STD-020B Level 1 moisture classification. | Select SMAJ90CA only for legacy repair or non-RoHS prototyping where tin-lead assembly is mandated. |
| SMBJ90CA-E3/52 | Higher 600 W rating, SMB (DO-214AA) package (smaller footprint), 160 V VC @ 3.4 A, same VWM/VBR. | Lower thermal mass and 80 °C/W junction-to-ambient vs. 15 °C/W junction-to-lead - less effective in sustained surge scenarios without copper pour. | Choose SMBJ90CA-E3/52 only when board space is constrained and peak pulse duty cycle remains <0.01%; verify thermal relief on SMB pads. |
Compared with SMAJ90CA and SMBJ90CA-E3/52, SMAJ90CAE3/TR13 delivers superior thermal conduction via DO-214AC leads and guaranteed RoHS compliance, making it optimal for high-reliability industrial power rails where long-term surge endurance and regulatory alignment are critical.
Availability
SMAJ90CAE3/TR13 is available at Aetrix Electronics and suitable for industrial power input protection, telecom interface surge suppression, and automotive body control modules requiring stable component supply and full IEC61000-4-5 Class 1 compliance.
Supply support for SMAJ90CAE3/TR13 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
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The SMAJ series was designed specifically for surface-mount transient voltage suppression in harsh environments, emphasizing fast response, high pulse power, and extended temperature operation - targeting power supply inputs, communication ports, and sensor interfaces.
FAQ
What does the "CA" suffix indicate in SMAJ90CAE3/TR13?
The "CA" suffix denotes a bidirectional configuration - meaning SMAJ90CAE3/TR13 provides symmetrical clamping for both positive and negative transients without polarity dependence. Unlike unidirectional variants (e.g., SMAJ90A), it has no cathode marking and functions identically regardless of terminal orientation, making it ideal for AC-coupled or floating signal lines where voltage polarity is undefined.
Is SMAJ90CAE3/TR13 compliant with IEC61000-4-5 for lightning surge protection?
Yes, SMAJ90CAE3/TR13 is validated for secondary lightning protection per IEC61000-4-5 with 42 Ω source impedance up to Class 1 (VWM ≤ 90 V), and with 12 Ω source impedance up to Class 2 (VWM ≤ 30 V). Its 160 V clamping voltage at 3.1 A IPP ensures downstream circuitry remains within safe operating limits during standardized surge waveforms.
What is the thermal resistance specification for SMAJ90CAE3/TR13?
SMAJ90CAE3/TR13 has a junction-to-lead thermal resistance of 15 °C/W and a junction-to-ambient resistance of 80 °C/W when mounted on an FR4 PCB with 1 oz copper and the recommended footprint. This dual-path thermal model reflects its design: heat flows efficiently through leads to copper pours (15 °C/W), while ambient convection alone yields higher resistance (80 °C/W), underscoring the importance of proper pad layout for sustained power dissipation.
Does SMAJ90CAE3/TR13 require moisture preconditioning before reflow?
No - SMAJ90CAE3/TR13 is rated Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it may be stored indefinitely at ≤30 °C/60% RH without dry packing or baking. The "e3" RoHS-compliant matte-tin plating and void-free epoxy body eliminate moisture ingress risk, enabling direct placement into standard reflow profiles including peak temperatures up to 260 °C for 10 seconds.
How does the clamping voltage of SMAJ90CAE3/TR13 compare to its breakdown voltage?
SMAJ90CAE3/TR13 has a minimum breakdown voltage (VBR) of 100 V at 1 mA and a maximum clamping voltage (VC) of 160 V at 3.1 A IPP - resulting in a 60 V clamping margin. This margin ensures reliable turn-on well above the 90 V standoff voltage (VWM) while limiting transient overshoot to a controlled, predictable level essential for protecting 100 V-rated semiconductors downstream.
SMAJ90CAE3/TR13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- 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):
- 3.4A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ90CAE3/TR13 FAQ
1.How can I place an order for SMAJ90CAE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ90CAE3/TR13 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 SMAJ90CAE3/TR13 reliable?
The price and inventory of SMAJ90CAE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ90CAE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ90CAE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ90CAE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ90CAE3/TR13?
SMAJ90CAE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ90CAE3/TR13 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 SMAJ90CAE3/TR13?
For technical support, including SMAJ90CAE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ90CAE3/TR13 requirements.
6.How does Aetrix verify that SMAJ90CAE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ90CAE3/TR13 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 SMAJ90CAE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ90CAE3/TR13?
All SMAJ90CAE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ90CAE3/TR13, 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 SMAJ90CAE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ90CAE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ90CAE3/TR13 Tags
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