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Microchip Technology SMAJ54CE3/TR13
- Part No.:
- SMAJ54CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ54CE3/TR13.pdf
- Description:
- TVS DIODE 54VWM 96.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,809
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Product details
Overview
SMAJ54CE3/TR13 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in DC power rails and signal lines. It features a 54 V reverse standoff voltage (VWM), 60 V minimum breakdown voltage (VBR), clamps transients to ≤96.3 V at 5.2 A peak pulse current, and delivers 500 W peak pulse power per 10/1000 µs waveform - used in industrial power supplies and telecom interface protection.
For engineers reviewing the SMAJ54CE3/TR13 datasheet, SMAJ54CE3/TR13 pinout, SMAJ54CE3/TR13 application, or SMAJ54CE3/TR13 equivalent, key selection criteria include bidirectional clamping capability, IEC61000-4-2/4-4/4-5 compliance, DO-214AC package thermal performance, and RoHS-compliant matte-tin terminations with tape-and-reel delivery (TR13).
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its <100 ps theoretical response time (unidirectional) and <5 ns for bidirectional operation ensures effective suppression of ESD, EFT, and lightning-induced surges before sensitive downstream circuitry is damaged.
The device is rated for -65°C to +150°C operating temperature, exhibits 15°C/W junction-to-lead thermal resistance, and maintains ≤1 μA standby leakage at VWM. Its 500 W peak pulse rating is validated under standardized 10/1000 µs exponential waveform conditions with 0.01% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous DC or RMS voltage the device blocks without clamping; sets operating margin for 48 V nominal systems. |
| VBR (min) | 60 V @ 1 mA - Minimum voltage at which avalanche conduction begins; defines lower bound of clamping onset threshold. |
| VC @ IPP | 96.3 V @ 5.2 A - Maximum clamped voltage during 10/1000 µs surge; determines worst-case overvoltage seen by protected ICs. |
| PPP | 500 W - Peak transient power dissipation capability; enables robust protection against IEC61000-4-5 Class 3/4 lightning surges. |
| ID @ VWM | ≤1 μA - Ultra-low leakage current ensures minimal power loss and no interference in high-impedance sensing circuits. |
| Package | DO-214AC (SMA) - Industry-standard surface-mount outline with wide leads for low thermal resistance (15°C/W) and high surge current handling. |
| RoHS | e3 suffix - Matte-tin plating compliant with RoHS Directive 2011/65/EU; suitable for lead-free reflow soldering up to 260°C for 10 s. |
Pinout & Package
DO-214AC (SMA) package with two terminals: cathode-marked end (band) for unidirectional variants; no polarity marking on bidirectional SMAJ54CE3/TR13. Leads are C-bend (modified J-bend), tin-lead or annealed matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Both terminals function identically; surge current flows either direction through shared avalanche junction - no orientation required during placement. |
| Case / Body | Thermal and mechanical interface | Void-free UL94V-0 epoxy body provides electrical isolation and transfers heat to PCB copper; recommended footprint per Microsemi datasheet Page 5. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals, differential buses (e.g., RS-485), or floating nodes without external polarity management circuitry. |
| IEC61000-4-5 compliance | Validated for secondary lightning protection up to Class 4 (42 Ω source) with VWM = 54 V - covers 48 V telecom and industrial control applications. |
| Fast response time | <5 ns turn-on for bidirectional mode ensures suppression of sub-microsecond ESD events (IEC61000-4-2 ±8 kV contact) before latch-up or gate oxide damage. |
| Low thermal resistance | 15°C/W junction-to-lead enables sustained 5 W steady-state dissipation at 75°C lead temperature - supports high-reliability power rail protection. |
| Tape-and-reel packaging | TR13 suffix indicates 13-inch reel with 2500 units per reel per EIA-481-1-A - optimized for automated SMT assembly with standard pick-and-place feeders. |
Applications
| Industrial Power Supply Protection | Telecom Interface Protection |
|---|---|
Use Scenario: 48 V DC input stage of programmable logic controller (PLC) power module exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed directly across input terminals to shunt surge energy to ground before it reaches DC-DC converter ICs. Use Value: Clamps 500 W surges to ≤96.3 V, preventing damage to 60 V-rated input MOSFETs and ensuring >100,000 surge cycles per IEC61000-4-5. |
Use Scenario: RS-485 data line in outdoor base station equipment subject to induced lightning surges and ESD from field maintenance. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair (A/B) to clamp common-mode transients while preserving signal integrity. Use Value: Symmetrical clamping limits differential swing to <2×96.3 V, maintaining receiver common-mode range and meeting IEC61000-4-2 Level 4 (±15 kV air) requirements. |
| Automotive Body Control Module | Medical Equipment Sensor Interface |
Use Scenario: LIN bus line in automotive door module subjected to battery disconnect transients and ISO 7637-2 Pulse 1/2a. IC Role / Device Role / Timing Role: Transient suppressor mounted at connector entry point to divert surge current away from LIN transceiver IC. Use Value: 54 V VWM aligns with 12 V system derated for cold-crank; 96.3 V clamping prevents transceiver latch-up during 100 V/50 ms pulses. |
Use Scenario: Analog front-end of patient monitoring device with isolated pressure sensor inputs vulnerable to ESD during clinical handling. IC Role / Device Role / Timing Role: Low-leakage (<1 μA) bidirectional TVS on sensor excitation and return lines to protect precision op-amps and ADC inputs. Use Value: Near-zero standby current avoids offset drift in microvolt-level measurements; fast <5 ns response prevents ESD-induced ADC saturation or reset. |
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 SMAJ54CA | Identical VWM (54 V), VBR (60 V min), VC (96.3 V), and DO-214AC package; same 500 W rating but specified per 10/1000 µs waveform per JEDEC standards. | No functional difference in clamping behavior or surge handling; identical IEC61000-4-5 Class 4 capability and thermal specs. | Select when dual-sourcing from Littelfuse-distributed channels is required; fully interchangeable in layout and BOM. |
| ON Semiconductor SMAJ54A | Unidirectional variant (no 'C' suffix); requires correct polarity orientation and cannot protect AC or floating nodes without additional components. | Not suitable for bidirectional signal lines (e.g., RS-485, CAN); limited to DC rail protection where polarity is fixed and known. | Choose only if system design mandates unidirectional clamping and polarity is strictly controlled; otherwise SMAJ54CE3/TR13 is preferred. |
Compared with SMAJ54A (unidirectional) and SMAJ54CA (Littelfuse), SMAJ54CE3/TR13 offers guaranteed bidirectional operation with RoHS-compliant matte-tin plating and TR13 tape-and-reel packaging - critical for automated manufacturing and AC-coupled interface protection where polarity independence is mandatory.
Availability
SMAJ54CE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, telecom interface protection, automotive body electronics, medical sensor interfaces, and RS-485/RS-422 data links requiring stable component supply and long-term obsolescence management.
Supply support for SMAJ54CE3/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 developed for surface-mount transient suppression in harsh environments - emphasizing robust surge handling, low thermal resistance, and compliance with IEC61000-4-x immunity standards for mission-critical systems.
FAQ
What does the 'C' in SMAJ54CE3/TR13 indicate?
The 'C' suffix denotes bidirectional construction, meaning SMAJ54CE3/TR13 clamps transients equally in both directions - essential for protecting AC-coupled or floating signal lines like RS-485, CAN, or audio interfaces without polarity constraints. Unlike unidirectional variants (e.g., SMAJ54A), SMAJ54CE3/TR13 has no cathode band marking and functions identically on both terminals.
Is SMAJ54CE3/TR13 compatible with lead-free reflow processes?
Yes, SMAJ54CE3/TR13 carries the 'e3' RoHS suffix, indicating annealed matte-tin plating qualified for lead-free reflow soldering at 260°C for up to 10 seconds per IPC/JEDEC J-STD-020B Level 1 moisture sensitivity - no dry-pack baking required. Its DO-214AC package withstands thermal cycling from -65°C to +150°C without degradation.
How does SMAJ54CE3/TR13 meet IEC61000-4-5 lightning surge requirements?
SMAJ54CE3/TR13 is rated for secondary lightning protection per IEC61000-4-5 with 42 Ω source impedance up to Class 4 (VWM ≤ 12 V) and Class 3 (VWM ≤ 24 V); its 54 V VWM qualifies it for Class 2 (≤ 30 V) and Class 1 (≤ 100 V) configurations. The 500 W peak pulse power and 96.3 V clamping ensure protected circuits remain within safe operating limits during 1.2/50 µs open-circuit voltage surges.
What is the thermal performance of SMAJ54CE3/TR13 on a standard PCB?
When mounted on FR4 with 1 oz copper and Microsemi's recommended footprint, SMAJ54CE3/TR13 achieves 15°C/W junction-to-lead and 80°C/W junction-to-ambient thermal resistance. This allows 5 W steady-state power dissipation at 75°C lead temperature or 1.56 W at 25°C ambient - sufficient for continuous protection in 48 V industrial power rails with adequate copper pour.
Can SMAJ54CE3/TR13 replace SMAJ54A in an existing design?
No - SMAJ54A is unidirectional and requires correct polarity orientation, whereas SMAJ54CE3/TR13 is bidirectional with no polarity marking. Substituting SMAJ54CE3/TR13 for SMAJ54A may cause improper clamping on DC rails if the original layout assumes cathode-anode directionality. For bidirectional signal lines, SMAJ54CE3/TR13 is the correct choice; for fixed-polarity DC rails, verify layout compatibility before replacement.
SMAJ54CE3/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):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 96.3V
- Current - Peak Pulse (10/1000µs):
- 5.2A
- 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)
SMAJ54CE3/TR13 FAQ
1.How can I place an order for SMAJ54CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ54CE3/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 SMAJ54CE3/TR13 reliable?
The price and inventory of SMAJ54CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ54CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ54CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ54CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ54CE3/TR13?
SMAJ54CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ54CE3/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 SMAJ54CE3/TR13?
For technical support, including SMAJ54CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ54CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ54CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ54CE3/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 SMAJ54CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ54CE3/TR13?
All SMAJ54CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ54CE3/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 SMAJ54CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ54CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ54CE3/TR13 Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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