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Microchip Technology SMAJ30CE3/TR13
- Part No.:
- SMAJ30CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ30CE3/TR13.pdf
- Description:
- TVS DIODE 30VWM 53.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,041
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Product details
Overview
SMAJ30CE3/TR13 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for robust ESD, EFT, and secondary lightning surge protection in DC power rails and signal lines. It features a 30 V reverse standoff voltage (VWM), 500 W peak pulse power rating at 10/1000 µs, clamping voltage of 48.4 V at 10.3 A peak pulse current, and operates across –65 °C to +150 °C. It is widely deployed in industrial power supplies and telecom interface circuits.
For engineers reviewing the SMAJ30CE3/TR13 datasheet, SMAJ30CE3/TR13 pinout, SMAJ30CE3/TR13 application, or SMAJ30CE3/TR13 equivalent, key selection criteria include bidirectional clamping behavior, IEC61000-4-2/4-4/4-5 compliance, DO-214AC package compatibility, RoHS-compliant matte-tin plating, and tape-and-reel packaging (TR13 = 2500/reel).
Technical Context
This bidirectional TVS diode operates symmetrically-clamping both positive and negative transients without polarity dependence-making it suitable for AC-coupled or floating signal paths. Its <100 ps theoretical response time ensures sub-nanosecond suppression onset, critical for protecting high-speed logic and analog front-ends against fast-rising ESD events.
The device uses silicon avalanche junction technology with a thermoset epoxy body (UL94V-0), C-bend leads, and is rated for 500 W peak pulse power at 25 °C with 0.01% duty cycle. Thermal resistance is 15 °C/W junction-to-lead when mounted per recommended FR4 footprint, enabling reliable power dissipation in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working range on protected line. |
| VBR min @ IBR | 33.3 V @ 1 mA - Minimum breakdown voltage threshold; ensures consistent turn-on across temperature and unit variation. |
| VC @ IPP | 48.4 V @ 10.3 A - Clamping voltage during 10/1000 µs surge; determines maximum voltage seen by downstream ICs. |
| PPP | 500 W - Peak pulse power handling capability; supports high-energy surges without failure under standard test waveform. |
| ID @ VWM | 1 µA - Reverse leakage current at standoff voltage; negligible loading on 30 V rail, preserving system efficiency. |
| Operating Temp | –65 °C to +150 °C - Full industrial and extended automotive ambient range; validated for harsh-environment deployment. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, void-free thermoset epoxy case with matte-tin-plated C-bend leads. Cathode band omitted (bidirectional); marking reads "30CE3".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as input or return; no polarity sensitivity-enables flexible placement across differential or AC lines. |
| Case / Body | Thermal & mechanical interface | Non-conductive UL94V-0 epoxy body; thermal path to PCB copper via leadframe; requires recommended pad layout (2.57–2.79 mm width) for optimal heat transfer. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Equal positive/negative breakdown (±33.3 V) and clamping (±48.4 V), eliminating need for polarity-aware routing in balanced interfaces. |
| IEC61000-4-5 compliance | Validated for secondary lightning protection up to Class 1 (42 Ω source) and Class 2 (12 Ω source) per specification limits. |
| RoHS-compliant plating | Matte-tin annealed finish meets J-STD-020B Level 1 moisture sensitivity; no dry-pack required prior to reflow. |
| Fast transient response | <5 ns response for bidirectional mode-ensures protection against ESD events faster than typical CMOS gate propagation delays. |
Applications
| Industrial Power Input Protection | Telecom Data Line Surge Suppression |
|---|---|
Use Scenario: 24–36 V DC input stage of programmable logic controllers (PLCs) exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input rails to clamp both polarity surges before they reach DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤48.4 V, preventing latch-up or oxide damage in 3.3 V/5 V logic powered from same rail. | Use Scenario: RS-485 transceiver bus lines in outdoor base stations subject to induced lightning surges and EFT bursts. IC Role / Device Role / Timing Role: Paired SMAJ30CE3/TR13 devices (line-to-ground) provide symmetrical clamping on A/B differential pair. Use Value: Maintains signal integrity by suppressing >10 A surges within 5 ns while adding <0.5 pF capacitance per line (per Figure 4). |
| Automotive Body Control Module (BCM) | Medical Sensor Interface Protection |
Use Scenario: 12 V auxiliary power rail in BCM modules where battery transients (ISO 7637-2 Pulse 1/2a/3a) coexist with ESD from user-accessible connectors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on fused 12 V supply feeding CAN transceivers and LIN drivers. Use Value: Withstands 500 W pulses without degradation, ensuring long-term reliability under repeated surge stress per AEC-Q101 recommendations. | Use Scenario: Analog front-end of patient-connected ECG or EEG sensors requiring low-leakage, low-capacitance protection on biopotential inputs. IC Role / Device Role / Timing Role: Low-ID (1 µA) bidirectional clamp between differential sensor inputs and ground to prevent ESD-induced amplifier saturation. Use Value: Enables direct connection to high-impedance electrodes without DC offset shift or noise injection due to standby current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30CAHE3/A | Same VWM, VBR, VC, and package; differs only in tape-and-reel packaging (750/reel vs. 2500/reel) and minor marking format. | No functional difference; suited for lower-volume prototyping or dual-sourcing where reel size affects SMT line setup. | Select SMAJ30CE3/TR13 for high-volume production with automated pick-and-place requiring 13-inch reels. |
| SMBJ30CA | Same electrical specs but SMB (DO-214AA) package-0.216" width vs. SMA's 0.110", resulting in higher thermal resistance (25 °C/W vs. 15 °C/W). | Lower power density handling; not recommended for sustained 500 W surges without derating or enhanced heatsinking. | Choose SMBJ30CA only if board space allows larger footprint and thermal margin is verified per application duty cycle. |
Compared with SMAJ30CAHE3/A, SMAJ30CE3/TR13 offers identical protection performance with optimized logistics for volume manufacturing; versus SMBJ30CA, it delivers superior thermal performance in the same functional role due to lower junction-to-lead resistance and tighter package footprint.
Availability
SMAJ30CE3/TR13 is available at Aetrix Electronics and suitable for industrial power input protection, telecom data line surge suppression, and automotive body control module designs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMAJ30CE3/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, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The SMAJ series was engineered for cost-effective, high-power surface-mount surge protection in space-constrained environments-prioritizing fast response, repeatable clamping, and rugged packaging for mission-critical infrastructure.
FAQ
What does the 'C' suffix in SMAJ30CE3/TR13 indicate?
The 'C' suffix denotes bidirectional construction-meaning SMAJ30CE3/TR13 clamps transients of either polarity symmetrically, unlike unidirectional variants (e.g., SMAJ30A). This eliminates polarity concerns during placement and enables use on AC-coupled or floating nodes where voltage excursions occur in both directions relative to ground.
Is SMAJ30CE3/TR13 compliant with IEC61000-4-5 for lightning surge protection?
Yes, SMAJ30CE3/TR13 is explicitly rated for secondary lightning protection per IEC61000-4-5: it supports Class 1 (42 Ω source impedance) and Class 2 (12 Ω source impedance) testing up to its 500 W rating. The clamping voltage of 48.4 V at 10.3 A ensures downstream circuitry remains within safe operating limits during standardized surge waveforms.
What is the meaning of 'TR13' in the part number SMAJ30CE3/TR13?
'TR13' specifies tape-and-reel packaging: 13-inch reels containing 2500 units each, conforming to EIA-481-1-A standards. This format is optimized for high-speed SMT assembly lines and ensures consistent feeding, orientation, and traceability-critical for automated manufacturing of industrial and telecom equipment using SMAJ30CE3/TR13.
How does the RoHS-compliant 'e3' suffix affect the soldering process for SMAJ30CE3/TR13?
The 'e3' suffix indicates matte-tin plating compliant with RoHS Directive 2011/65/EU, with solderability validated per MIL-STD-750 Method 2026. SMAJ30CE3/TR13 supports standard Pb-free reflow profiles (peak 260 °C for 10 s max) and requires no special pre-bake-its moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1, eliminating dry-pack requirements.
Can SMAJ30CE3/TR13 replace SMAJ30A in an existing design?
No-SMAJ30CE3/TR13 is bidirectional while SMAJ30A is unidirectional. Substituting them without circuit review risks improper clamping during negative transients, potentially damaging downstream components. SMAJ30CE3/TR13 requires symmetric placement (no cathode band), whereas SMAJ30A must be oriented with cathode toward the protected side of the rail.
SMAJ30CE3/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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 53.5V
- Current - Peak Pulse (10/1000µs):
- 9.3A
- 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)
SMAJ30CE3/TR13 FAQ
1.How can I place an order for SMAJ30CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ30CE3/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 SMAJ30CE3/TR13 reliable?
The price and inventory of SMAJ30CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ30CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ30CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ30CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ30CE3/TR13?
SMAJ30CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ30CE3/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 SMAJ30CE3/TR13?
For technical support, including SMAJ30CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ30CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ30CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ30CE3/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 SMAJ30CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ30CE3/TR13?
All SMAJ30CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ30CE3/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 SMAJ30CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ30CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ30CE3/TR13 Tags
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