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Microchip Technology SMAJ36E3/TR13
- Part No.:
- SMAJ36E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ36E3/TR13.pdf
- Description:
- TVS DIODE 36VWM 64.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,745
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Product details
Overview
SMAJ36E3/TR13 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 500 W peak pulse power at 10/1000 µs, with 36 V standoff voltage (VWM), 40.0 V minimum breakdown voltage (VBR), and 58.1 V maximum clamping voltage (VC) at 8.6 A peak pulse current - deployed for ESD/EFT protection in industrial power supplies and telecom interface circuits.
For engineers reviewing the SMAJ36E3/TR13 datasheet, SMAJ36E3/TR13 pinout, SMAJ36E3/TR13 application, or SMAJ36E3/TR13 equivalent, key selection criteria include clamping voltage margin vs. protected IC's absolute maximum rating, IEC61000-4-2/4-4 compliance verification, thermal derating on FR4 PCBs, and RoHS-compliant matte-tin terminal plating compatibility with lead-free reflow profiles.
Technical Context
This unidirectional TVS operates as a fast-acting shunt clamp, triggering at ≥40.0 V (VBR min @ 1 mA) and limiting transients to ≤58.1 V (VC) during 8.6 A 10/1000 µs surges. Its <100 ps theoretical response time enables effective suppression of electrostatic discharge events per IEC61000-4-2 Level 4 (±15 kV contact).
Designed for surface-mount assembly on standard FR4 boards with recommended footprint, it delivers 5 W steady-state power dissipation at 75 °C lead temperature and exhibits 15 °C/W junction-to-lead thermal resistance - requiring attention to pad copper area and adjacent ground plane for sustained surge handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 36 V - Maximum continuous reverse operating voltage before conduction begins; must exceed circuit's normal DC rail by ≥10%. |
| VBR (Min) | 40.0 V @ 1 mA - Guaranteed breakdown threshold; defines earliest clamping onset under surge conditions. |
| VC @ IPP | 58.1 V @ 8.6 A - Clamped voltage during 10/1000 µs surge; determines maximum stress on downstream ICs. |
| PPP | 500 W @ 10/1000 µs - Peak transient energy absorption capability; validated per Figure 1 derating curve. |
| ID @ VWM | 1 μA max - Leakage current at 36 V; ensures negligible standby power loss in high-impedance signal paths. |
| TJ Range | −65 °C to +150 °C - Full operational junction temperature range; supports automotive under-hood and industrial ambient use. |
Pinout & Package
DO-214AC (SMA) package: molded thermosetting epoxy body (UL94V-0), C-bend leads with RoHS-compliant annealed matte-tin plating, cathode indicated by band. Weight: 0.064 g. Moisture sensitivity level: Level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path | Connected to system ground or low-impedance reference; carries full surge current during clamping. |
| Cathode | Protected line input | Connected to I/O line or power rail being safeguarded; polarity band identifies this terminal. |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant "e3" suffix | Matte-tin terminal plating meets J-STD-020B Level 1 moisture classification and lead-free reflow compatibility. |
| 500 W peak pulse rating | Validated at 10/1000 µs waveform per Figure 1; supports secondary lightning protection per IEC61000-4-5 Class 3 (42 Ω source). |
| Fast response time | <100 ps theoretical turn-on enables reliable suppression of ESD events per IEC61000-4-2 ±15 kV contact discharge. |
| Low thermal resistance | 15 °C/W junction-to-lead allows efficient heat transfer to PCB copper; requires adherence to recommended pad layout (Page 5). |
Applications
| Industrial Power Input Protection | Telecom Data Line Surge Suppression |
|---|---|
Use Scenario: 24–48 V DC input stage of programmable logic controllers exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between input rail and chassis ground to clamp positive-going surges above 36 V. Use Value: Limits transient voltage to ≤58.1 V, protecting upstream DC-DC controller ICs rated for 60 V absolute maximum input. | Use Scenario: RS-485 transceiver bus lines in outdoor base stations subjected to induced RF and EFT bursts. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (one per line) referenced to common ground, clamping differential and common-mode transients. Use Value: Maintains signal integrity by suppressing EFT per IEC61000-4-4 (4 kV fast transient) without adding capacitance that degrades 10 Mbps data rates. |
| Automotive Body Control Module I/O | Medical Equipment Sensor Interface |
Use Scenario: LIN bus or switched 12 V sensor inputs in vehicle body control units operating across −40 °C to +125 °C ambient. IC Role / Device Role / Timing Role: Unidirectional TVS on each input line, with cathode tied to supply rail and anode to ground, guarding against battery reverse connection and jump-start spikes. Use Value: Withstands 40 A forward surge (8.3 ms half-sine) and operates reliably over full automotive temperature range per AEC-Q101 guidance. | Use Scenario: Analog front-end of patient-connected ECG monitor interfacing with external electrodes prone to ESD during handling. IC Role / Device Role / Timing Role: Low-leakage (≤1 μA) unidirectional TVS on signal path between electrode connector and instrumentation amplifier input. Use Value: Prevents amplifier latch-up during ±15 kV IEC61000-4-2 contact discharge while introducing negligible offset error due to sub-μA 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 |
|---|---|---|---|
| SMAJ36A | Same VWM, VBR, VC, and PPP; non-RoHS tin-lead plating; no "e3" suffix. | Lacks RoHS compliance; unsuitable for lead-free manufacturing or EU markets. | Select SMAJ36A only for legacy through-hole-compatible designs or non-RoHS production environments. |
| SMBJ36A | Same electrical specs but SMB (DO-214AA) package: 3.5 mm width vs. SMA's 4.5 mm; 400 W PPP rating. | Lower surge capacity and smaller thermal mass; less robust for repeated 500 W transients. | Choose SMBJ36A only when board space is constrained and peak surge duty cycle remains below 0.01%. |
Compared with SMAJ36A and SMBJ36A, SMAJ36E3/TR13 uniquely combines RoHS compliance, full 500 W surge rating, and DO-214AC mechanical robustness - making it optimal for new industrial and telecom designs requiring both regulatory alignment and high-energy transient immunity.
Availability
SMAJ36E3/TR13 is available at Aetrix Electronics and suitable for industrial power input protection, telecom data line surge suppression, automotive body control module I/O, and medical equipment sensor interface applications requiring stable component supply and traceable RoHS-compliant sourcing.
Supply support for SMAJ36E3/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, and industrial markets.
The SMAJ series was engineered for surface-mount transient suppression in harsh environments, emphasizing fast response, repeatable clamping, and robust thermal performance on standard PCBs.
FAQ
What does the "E3" suffix mean in SMAJ36E3/TR13?
The "E3" suffix in SMAJ36E3/TR13 indicates RoHS-compliant matte-tin terminal plating per IPC/JEDEC J-STD-020B Level 1 moisture classification. This ensures compatibility with lead-free reflow soldering profiles and meets environmental compliance requirements for global electronics manufacturing without requiring dry-pack handling.
Is SMAJ36E3/TR13 unidirectional or bidirectional?
SMAJ36E3/TR13 is a unidirectional TVS diode, as confirmed by its part number structure (no "C" or "CA" suffix) and specification table listing only one VBR value. It conducts in reverse bias above 40.0 V and blocks forward current up to 3.50 V, making it suitable for DC rail protection where polarity is fixed.
What is the clamping voltage of SMAJ36E3/TR13 at its rated peak pulse current?
The clamping voltage of SMAJ36E3/TR13 is 58.1 V at 8.6 A peak pulse current (IPP) under the standard 10/1000 µs waveform. This value is measured per Figure 2 in the datasheet and defines the maximum voltage imposed on protected circuitry during a full-rated surge event.
Can SMAJ36E3/TR13 be used for IEC61000-4-5 lightning surge protection?
Yes, SMAJ36E3/TR13 supports secondary lightning surge protection per IEC61000-4-5 with 42 Ω source impedance at Class 3 level (up to 1 kV test voltage), as explicitly stated in the Applications section. Its 500 W rating and 58.1 V clamping ensure safe operation when paired with appropriate series impedance on the protected line.
What is the thermal resistance and recommended mounting condition for SMAJ36E3/TR13?
SMAJ36E3/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 footprint (Page 5). To maintain reliability, designers must follow the specified pad layout and avoid excessive copper isolation around the device.
SMAJ36E3/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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 64.3V
- Current - Peak Pulse (10/1000µs):
- 9.8A
- 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)
SMAJ36E3/TR13 FAQ
1.How can I place an order for SMAJ36E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ36E3/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 SMAJ36E3/TR13 reliable?
The price and inventory of SMAJ36E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ36E3/TR13 is usually 5 days.
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SMAJ36E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ36E3/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 SMAJ36E3/TR13?
For technical support, including SMAJ36E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ36E3/TR13 requirements.
6.How does Aetrix verify that SMAJ36E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ36E3/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 SMAJ36E3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ36E3/TR13?
All SMAJ36E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ36E3/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 SMAJ36E3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ36E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ36E3/TR13 Tags
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