My Inquiry
My Account
Microchip Technology SMAJ15CAE3/TR13
- Part No.:
- SMAJ15CAE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ15CAE3/TR13.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,776
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ15CAE3/TR13 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust ESD, EFT, and secondary lightning surge protection in DC power rails and signal lines. It features a 15 V working peak standoff voltage (VWM), 16.7 V minimum breakdown voltage (VBR), 26.9 V maximum clamping voltage (VC) at 18.8 A peak pulse current, and 500 W peak pulse power rating per 10/1000 µs waveform.
For engineers reviewing the SMAJ15CAE3/TR13 datasheet, SMAJ15CAE3/TR13 pinout, SMAJ15CAE3/TR13 application, or SMAJ15CAE3/TR13 equivalent, key selection criteria include bidirectional clamping capability, RoHS-compliant matte-tin plating, DO-214AC package compatibility, IEC61000-4-2/4-4/4-5 compliance, and suitability for industrial power input and telecom interface protection.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its sub-5 ns clamping response time ensures effective suppression of fast transients including ESD events (±15 kV contact, ±25 kV air per IEC61000-4-2) and electrical fast transients (EFT).
The device is rated for secondary lightning surge immunity per IEC61000-4-5 with 42 Ω source impedance up to Class 4 (SMAJ12A/CA and lower), and supports 12 Ω source impedance up to Class 2 (SMAJ16A/CA and lower). Thermal resistance is 15 °C/W junction-to-lead when mounted per recommended footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail voltage margin. |
| VBR min | 16.7 V @ 1 mA - Minimum breakdown threshold; ensures reliable turn-on above normal operating voltage. |
| VC max | 26.9 V @ 18.8 A - Clamped voltage during 10/1000 µs surge; limits downstream component stress. |
| PPP | 500 W - Peak pulse power handling capacity; enables protection against high-energy surges. |
| IPP | 18.8 A - Peak pulse current supported at VC; determines survivability under standardized surge waveforms. |
| ID max | 1 µA @ VWM - Standby leakage current; negligible power loss and minimal impact on low-power circuits. |
| tCLAMP | < 5 ns - Bidirectional clamping response time; critical for suppressing nanosecond-scale ESD events. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, void-free thermosetting epoxy case meeting UL94V-0; cathode band omitted for bidirectional configuration; RoHS-compliant annealed matte-tin plating; weight 0.064 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as anode or cathode depending on transient polarity; no polarity marking required. |
| Case / Body | Thermal and mechanical interface | Provides thermal conduction path to PCB copper; requires recommended pad layout (A=1.70–2.26 mm, D=4.93–5.48 mm) for optimal heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals, differential buses, or ungrounded interfaces without polarity sensitivity. |
| IEC61000-4-5 Class 4 compliance | Validated for secondary lightning surges with 42 Ω source impedance up to 12 V VWM devices - SMAJ15CAE3/TR13 qualifies for Class 4 applications requiring ≤12 V standoff. |
| RoHS-compliant "e3" termination | Matte-tin plating meets JEDEC J-STD-020B Level 1 moisture sensitivity; no dry pack required; compatible with lead-free reflow. |
| DO-214AC footprint compatibility | Standardized land pattern allows drop-in replacement with other SMA-package TVS diodes; simplifies design reuse and sourcing flexibility. |
| 100% temperature cycling screening option | Available with MA prefix for avionics-grade reliability (-55°C to +125°C, 10 cycles); not included in SMAJ15CAE3/TR13 base part number. |
Applications
| Industrial Power Input Protection | Telecom Interface Protection |
|---|---|
Use Scenario: 24 V DC power entry point in programmable logic controllers exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Primary surge clamp limiting voltage excursion to <27 V during 500 W transients. Use Value: Prevents damage to upstream DC-DC converters and downstream microcontrollers by clamping surges within safe operating area defined by VC = 26.9 V. | Use Scenario: RS-485 data line pair in outdoor network equipment subject to induced lightning surges and ESD events. IC Role / Device Role / Timing Role: Bidirectional transient suppressor placed across differential pair to shunt common-mode surges to ground. Use Value: Maintains signal integrity by limiting differential voltage swing to <27 V while surviving >18 A peak pulses per IEC61000-4-5. |
| Automotive Body Control Module | Consumer USB Port Protection |
Use Scenario: LIN bus line in automotive body control module subjected to battery disconnect transients and ESD. IC Role / Device Role / Timing Role: Fast-response bidirectional TVS absorbing sub-5 ns ESD events and slower load-dump energy. Use Value: Ensures LIN transceiver reliability with <5 ns clamping response and 1 µA leakage at 15 V nominal supply. | Use Scenario: VBUS line in USB 2.0 host port exposed to human-body-model ESD and hot-plug voltage overshoot. IC Role / Device Role / Timing Role: Standoff-rated clamp protecting USB controller ICs from overvoltage beyond 15 V. Use Value: Provides certified IEC61000-4-2 ±15 kV contact discharge protection without affecting 5 V DC operation due to low leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15CAHE3/TR13 | Same electrical specs; "H" suffix indicates halogen-free construction per IEC61249-2-21. | No functional difference in surge performance; selected only when halogen-free compliance is mandated. | Choose SMAJ15CAHE3/TR13 if RoHS + halogen-free certification is required; otherwise SMAJ15CAE3/TR13 is standard. |
| SMBJ15CA-E3/52 | Same VWM, VBR, VC; SMB package (DO-214AA) has larger thermal mass but 20% higher RθJA (80 °C/W vs 70 °C/W). | Lower power density; suitable where board space permits larger footprint and higher surge repetition is not required. | Choose SMBJ15CA-E3/52 for higher thermal margin in low-duty-cycle applications; SMAJ15CAE3/TR13 preferred for space-constrained designs. |
Compared with SMAJ15CAHE3/TR13 and SMBJ15CA-E3/52, SMAJ15CAE3/TR13 offers identical surge ratings in the smallest DO-214AC footprint with standard RoHS compliance-making it optimal for high-density industrial and telecom PCBs where halogen-free certification is not mandatory.
Availability
SMAJ15CAE3/TR13 is available at Aetrix Electronics and suitable for industrial power input protection, telecom interface protection, automotive body control modules, and consumer USB port protection requiring stable component supply and full traceability.
Supply support for SMAJ15CAE3/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 and mixed-signal components for aerospace, defense, industrial, and communications markets.
The SMAJ series was engineered for cost-effective, high-power surface-mount transient suppression in harsh environments-targeting applications demanding fast response, repeatable clamping, and compliance with IEC61000-4-x immunity standards.
FAQ
What does the "CA" suffix mean in SMAJ15CAE3/TR13?
The "CA" suffix in SMAJ15CAE3/TR13 denotes a bidirectional configuration, meaning the device provides symmetrical clamping for both positive and negative transients. Unlike unidirectional variants (e.g., SMAJ15A), SMAJ15CAE3/TR13 has no polarity marking and functions identically regardless of voltage polarity applied across its terminals.
Is SMAJ15CAE3/TR13 compliant with IEC61000-4-5 for lightning surge protection?
Yes, SMAJ15CAE3/TR13 is validated for secondary lightning surge immunity per IEC61000-4-5 with 42 Ω source impedance up to Class 4 (≤12 V VWM) and with 12 Ω source impedance up to Class 2 (≤16 V VWM). Its 26.9 V clamping voltage at 18.8 A ensures protected circuits remain within safe operating limits during standardized surge tests.
What is the thermal resistance of SMAJ15CAE3/TR13, and how does it affect PCB layout?
SMAJ15CAE3/TR13 has a junction-to-lead thermal resistance of 15 °C/W and junction-to-ambient resistance of 80 °C/W when mounted on FR4 with 1 oz copper and the recommended pad layout. To maintain reliability under repeated surges, designers must follow the specified footprint (A=1.70–2.26 mm, D=4.93–5.48 mm) to ensure adequate copper area for heat spreading.
Does SMAJ15CAE3/TR13 require moisture-sensitive handling or dry packing?
No, SMAJ15CAE3/TR13 has IPC/JEDEC J-STD-020B moisture sensitivity level (MSL) 1, meaning it is not moisture-sensitive and requires no dry pack or baking prior to reflow soldering. Its void-free epoxy encapsulation and matte-tin plating support standard lead-free reflow profiles up to 260 °C for 10 seconds.
How does the clamping response time of SMAJ15CAE3/TR13 compare between unidirectional and bidirectional modes?
SMAJ15CAE3/TR13 exhibits a clamping response time of less than 5 ns for bidirectional operation, as confirmed in the manufacturer's datasheet. This is slower than the <100 ps theoretical response of unidirectional variants (e.g., SMAJ15A) due to inherent carrier recombination dynamics in symmetrical avalanche structures-but still fully sufficient for ESD (IEC61000-4-2) and EFT (IEC61000-4-4) protection.
SMAJ15CAE3/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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 20.6A
- 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)
SMAJ15CAE3/TR13 FAQ
1.How can I place an order for SMAJ15CAE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ15CAE3/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 SMAJ15CAE3/TR13 reliable?
The price and inventory of SMAJ15CAE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ15CAE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ15CAE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ15CAE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ15CAE3/TR13?
SMAJ15CAE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ15CAE3/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 SMAJ15CAE3/TR13?
For technical support, including SMAJ15CAE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ15CAE3/TR13 requirements.
6.How does Aetrix verify that SMAJ15CAE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ15CAE3/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 SMAJ15CAE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ15CAE3/TR13?
All SMAJ15CAE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ15CAE3/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 SMAJ15CAE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ15CAE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ15CAE3/TR13 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
