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Microchip Technology SMAJ70CE3/TR13
- Part No.:
- SMAJ70CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ70CE3/TR13.pdf
- Description:
- TVS DIODE 70VWM 125VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,643
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Product details
Overview
SMAJ70CE3/TR13 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for IEC 61000-4-2/4-4/4-5-compliant ESD, EFT, and secondary lightning protection. It features a 70 V standoff voltage (VWM), 125 V clamping voltage (VC) at 4.0 A peak pulse current, and 500 W peak pulse power rating at 10/1000 µs waveform - deployed in industrial power supplies and telecom interface circuits.
For engineers reviewing the SMAJ70CE3/TR13 datasheet, SMAJ70CE3/TR13 pinout, SMAJ70CE3/TR13 application, or SMAJ70CE3/TR13 equivalent, key selection criteria include bidirectional polarity, DO-214AC package compatibility, 125 V clamping performance under 4.0 A surge, RoHS-compliant matte-tin plating, and tape-and-reel packaging (TR13 = 2500/reel).
Technical Context
This bidirectional TVS operates symmetrically across both polarities with identical breakdown (VBR ≥ 77.8 V @ 1 mA) and clamping characteristics in either direction. Its <100 ps theoretical response time enables effective suppression of fast-rising ESD transients per IEC61000-4-2 Level 4 (±8 kV contact).
Rated for 500 W peak pulse power at 10/1000 µs, it delivers 4.0 A peak pulse current (IPP) while maintaining VC ≤ 125 V. Thermal resistance is 15 °C/W junction-to-lead and 80 °C/W junction-to-ambient on FR4 with recommended footprint, supporting reliable operation from –65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 70 V - maximum continuous reverse working voltage before conduction begins |
| VBR (Min) | 77.8 V @ 1 mA - guaranteed breakdown initiation threshold in both directions |
| VC @ IPP | 125 V @ 4.0 A - clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPP | 500 W - peak pulse power handling capability defines surge energy absorption limit |
| IPP | 4.0 A - maximum non-destructive surge current at specified waveform and VC |
| ID @ VWM | 1 µA - ultra-low leakage ensures minimal standby power loss in high-impedance circuits |
| Operating Temp | –65 °C to +150 °C - wide range supports automotive under-hood and industrial control environments |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, void-free thermosetting epoxy case meeting UL94V-0; terminals feature C-bend (modified J-bend) leads with RoHS-compliant annealed matte-tin plating solderable per MIL-STD-750 Method 2026; no polarity marking on bidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Bidirectional conduction - either terminal serves as input or return path during surge events |
| Case / Body | Thermal & mechanical interface | Provides primary heat dissipation path to PCB copper; requires recommended pad layout (Page 5) for thermal reliability |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional architecture | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 500 W peak pulse rating | Supports robust immunity to IEC61000-4-5 Class 3 (42 Ω source) secondary lightning surges |
| RoHS-compliant "e3" suffix | Meets EU Directive 2011/65/EU with matte-tin plating and halogen-free epoxy body |
| Tape-and-reel packaging (TR13) | 2500 units per 13-inch reel - optimized for automated SMT placement and inventory management |
| Moisture sensitivity Level 1 | No dry pack or baking required prior to reflow - reduces manufacturing overhead and floor life risk |
Applications
| Industrial Power Input Protection | Telecom Line Interface |
|---|---|
|
Use Scenario: 24–48 V DC power rail in programmable logic controllers exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input terminals to clamp positive/negative surges before they reach DC-DC converters and microcontrollers. Use Value: 125 V clamping limits stress on 36 V-rated input stages; 500 W rating handles repetitive 4.0 A surges without degradation. |
Use Scenario: RS-485 data lines in outdoor base stations subjected to ESD and induced RF coupling from nearby antennas. IC Role / Device Role / Timing Role: TVS connected between differential pair (A/B) and ground to shunt common-mode transients while preserving signal integrity. Use Value: Symmetric clamping ensures equal protection on both lines; low 1 µA leakage avoids bias current errors in high-impedance receivers. |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
|
Use Scenario: LIN bus communication line in door module operating in temperature-cycled cabin environment (–40 °C to +85 °C). IC Role / Device Role / Timing Role: Bidirectional TVS mounted directly at connector to absorb ESD events during service access and cable mating. Use Value: –65 °C to +150 °C rating ensures reliability across full automotive thermal range; DO-214AC footprint fits tight board space constraints. |
Use Scenario: H-bridge gate drive supply rail in washing machine motor controller exposed to back-EMF spikes during commutation. IC Role / Device Role / Timing Role: TVS placed across VDD and GND to protect level-shifters and gate drivers from inductive kickback. Use Value: 70 V standoff matches typical 60 V rail design margin; 125 V clamping prevents overvoltage latch-up in CMOS drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ70CA | Identical VWM (70 V), VC (125 V), and PPP (500 W); same DO-214AC package and bidirectional configuration | No functional deviation - validated for same IEC61000-4-2/4-4/4-5 test profiles | Drop-in alternative with identical electrical and mechanical specs; suitable when dual-sourcing is required |
| Vishay SMAJ70CAHE3_A/H | VWM = 70 V, VC = 125 V, PPP = 500 W; RoHS-compliant matte-tin plating; same DO-214AC outline but slightly tighter VBR min (77.8 V vs. 77.8 V typical) | Same application scope; minor VBR distribution variance does not affect system-level protection margin | Validated alternative with equivalent surge performance; preferred where Vishay's extended qualification (AEC-Q200 option) is specified |
Compared with SMAJ70CE3/TR13, Littelfuse SMAJ70CA offers identical electrical and mechanical interchangeability, while Vishay SMAJ70CAHE3_A/H provides matching surge ratings with optional automotive-grade screening - both enable seamless substitution without layout or firmware changes.
Availability
SMAJ70CE3/TR13 is available at Aetrix Electronics and suitable for industrial power input protection, telecom line interface, automotive body control modules, and consumer appliance motor drives requiring stable component supply and long-term lifecycle support.
Supply support for SMAJ70CE3/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 ICs, RF solutions, and discrete protection devices for aerospace, defense, and industrial markets.
The SMAJ series was engineered specifically for surface-mount transient voltage suppression in harsh environments - delivering 500 W surge capability in the compact DO-214AC package for space-constrained, high-immunity designs.
FAQ
What is the clamping voltage of SMAJ70CE3/TR13 under a 10/1000 µs surge?
The SMAJ70CE3/TR13 has a maximum clamping voltage (VC) of 125 V at 4.0 A peak pulse current (IPP) under the standardized 10/1000 µs double-exponential surge waveform. This value is measured across the device terminals during surge testing and defines the upper voltage limit imposed on protected circuitry - critical for ensuring downstream components remain within their absolute maximum ratings.
Is SMAJ70CE3/TR13 unidirectional or bidirectional?
SMAJ70CE3/TR13 is a bidirectional transient voltage suppressor, indicated by the "C" suffix in the part number. It provides symmetrical clamping behavior in both forward and reverse directions, making it suitable for protecting AC-coupled signals, differential buses (e.g., RS-485), or any circuit where polarity reversal or common-mode transients may occur - unlike unidirectional variants (e.g., SMAJ70A) which conduct only in one direction.
What does the "e3" and "TR13" suffix mean in SMAJ70CE3/TR13?
The "e3" suffix denotes RoHS compliance with annealed matte-tin plating and halogen-free epoxy encapsulation per EU Directive 2011/65/EU. The "TR13" indicates tape-and-reel packaging: 2500 units per 13-inch reel, conforming to EIA-481-1-A standards - enabling direct use in automated SMT assembly lines without repackaging or manual handling.
What is the standoff voltage (VWM) and why is it important for SMAJ70CE3/TR13?
The standoff voltage (VWM) of SMAJ70CE3/TR13 is 70 V - the maximum continuous reverse voltage the device can withstand without entering avalanche conduction. This parameter ensures the TVS remains non-conductive during normal operation, minimizing leakage current (<1 µA) and avoiding interference with circuit functionality, while still triggering reliably during overvoltage events exceeding this threshold.
Can SMAJ70CE3/TR13 be used for IEC61000-4-5 secondary lightning protection?
Yes, SMAJ70CE3/TR13 is rated for secondary lightning protection per IEC61000-4-5 with 42 Ω source impedance up to Class 3 (VC ≤ 125 V at 4.0 A supports the required surge current levels). Its 500 W peak pulse power rating and fast response (<5 ns for bidirectional mode) ensure effective energy diversion during induced surges in industrial and telecom infrastructure applications.
SMAJ70CE3/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):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 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)
SMAJ70CE3/TR13 FAQ
1.How can I place an order for SMAJ70CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ70CE3/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 SMAJ70CE3/TR13 reliable?
The price and inventory of SMAJ70CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ70CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ70CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ70CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ70CE3/TR13?
SMAJ70CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ70CE3/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 SMAJ70CE3/TR13?
For technical support, including SMAJ70CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ70CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ70CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ70CE3/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 SMAJ70CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ70CE3/TR13?
All SMAJ70CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ70CE3/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 SMAJ70CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ70CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ70CE3/TR13 Tags
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