My Inquiry
My Account
Microchip Technology SMAJ75CE3/TR13
- Part No.:
- SMAJ75CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ75CE3/TR13.pdf
- Description:
- TVS DIODE 75VWM 134VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,002
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ75CE3/TR13 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in DC power lines and signal interfaces. It features a 75 V reverse standoff voltage (VWM), 134 A peak pulse current (IPP) at 10/1000 µs, 125 V maximum clamping voltage (VC), and 500 W peak pulse power dissipation - enabling robust IEC61000-4-5 secondary lightning and IEC61000-4-2 ESD protection in industrial power supplies and telecom interfaces.
For engineers reviewing the SMAJ75CE3/TR13 datasheet, SMAJ75CE3/TR13 pinout, SMAJ75CE3/TR13 application, or SMAJ75CE3/TR13 equivalent, this device is evaluated for bidirectional surge suppression in 24–48 V DC systems, PCB-level EFT hardening per IEC61000-4-4, and RoHS-compliant board-level protection where low standby leakage (<1 µA @ VWM) and fast response (<5 ns) are required.
Technical Context
The SMAJ75CE3/TR13 implements a silicon avalanche diode structure optimized for bidirectional clamping, with symmetrical breakdown behavior in both polarities. Its VBR min of 83.3 V @ IBR = 1 mA ensures precise voltage thresholding, while thermal resistance of 15 °C/W (junction-to-lead) supports reliable power derating up to 150 °C operating temperature.
Designed for DO-214AC (SMA) package mounting on FR4 with 1 oz Cu, it delivers 5 W steady-state power dissipation at TL = 75 °C and maintains <1 µA standby current at rated 75 V standoff - critical for low-power monitoring circuits and always-on interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bus voltage margin. |
| VBR min | 83.3 V @ 1 mA - Minimum breakdown voltage ensures predictable turn-on under surge conditions. |
| VC @ IPP | 125 V @ 134 A - Clamped voltage during 10/1000 µs surge; determines protected circuit's maximum stress level. |
| PPP | 500 W - Peak pulse power handling capability at 25 °C; validates compliance with IEC61000-4-5 Class 3 (42 Ω source). |
| IPP | 134 A - Peak surge current capacity at 10/1000 µs waveform; sets minimum surge withstand rating for 48 V systems. |
| ID @ VWM | <1 µA - Ultra-low leakage ensures minimal power loss and no interference with high-impedance sensing nodes. |
| tclamp | <5 ns - Bidirectional response time guarantees sub-nanosecond effective clamping for fast transients like EFT bursts. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bidirectional configuration with no polarity marking; void-free thermosetting epoxy body (UL94V-0), matte-tin RoHS-compliant plating, 0.064 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Both terminals function identically as clamping nodes; no cathode band marking; enables placement without orientation check. |
| Case / Body | Thermal conduction path | Leads serve as primary heat sink; 15 °C/W junction-to-lead thermal resistance requires adequate copper pour for sustained 5 W operation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection on AC-coupled or floating DC lines without polarity constraints. |
| 500 W 10/1000 µs rating | Validates compliance with IEC61000-4-5 Class 3 (42 Ω) and Class 2 (12 Ω) secondary lightning test levels. |
| RoHS-compliant "e3" suffix | Meets EU Directive 2011/65/EU with annealed matte-tin plating and lead-free assembly compatibility. |
| DO-214AC footprint | Standardized pad layout (JEDEC MS-013 variant) ensures drop-in replacement across TVS families and broad PCB design reuse. |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and bake-out prior to reflow; supports standard SMT manufacturing flow. |
Applications
| Industrial Power Supply Protection | Telecom DC Feeder Line 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 bidirectional clamping element placed directly at connector entry point to limit surge energy before upstream regulators. Use Value: Withstands 134 A surges while clamping to 125 V, preventing damage to 60 V-rated DC-DC controllers and maintaining system uptime per IEC61000-4-5 Class 3. | Use Scenario: -48 V DC feeding line in central office equipment subject to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Front-end TVS on power feed interface, coordinated with gas discharge tube (GDT) for staged protection. Use Value: 500 W peak power rating and 125 V clamping enable coordination with GDT let-through voltage, ensuring downstream DC/DC converters see <150 V stress during 10/1000 µs events. |
| Automotive Body Control Module (BCM) | RS-485 Data Line Protection |
Use Scenario: 24 V supply rail in BCM exposed to ISO 7637-2 pulse 1, 2a, and 5a transients during vehicle operation. IC Role / Device Role / Timing Role: Secondary overvoltage clamp after primary LC filter, protecting microcontroller power pins and CAN transceivers. Use Value: 75 V VWM provides 3× margin above nominal 24 V, while <1 µA leakage avoids battery drain in sleep mode. | Use Scenario: Bi-directional RS-485 transceiver (e.g., MAX1487) in factory automation node connected to noisy field wiring. IC Role / Device Role / Timing Role: Common-mode surge suppressor across A/B differential pair, referenced to local ground plane. Use Value: Symmetrical clamping ensures equal protection for positive and negative ESD events (±15 kV contact per IEC61000-4-2), preserving signal integrity without polarity bias. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ75CA-E3/5B (Vishay) | Identical DO-214AC package, same 75 V VWM, 134 A IPP, and 125 V VC; minor VBR tolerance (83.3–92.2 V vs. 83.3–94.4 V). | No functional difference in IEC61000-4-5 Class 3 or ESD protection; identical thermal specs and moisture sensitivity. | Select for multi-source procurement where Vishay qualification is mandated; same footprint and electrical performance. |
| 1.5SMC75CA (ON Semiconductor) | Higher 1.5 kW rating but larger DO-214AB (SMC) package; 125 V VC at 134 A, but 75 V VWM and bidirectional construction retained. | Requires PCB layout change due to larger body (7.11 × 6.22 mm vs. 4.57 × 2.79 mm); suited for higher-energy environments where space allows. | Choose when surge energy exceeds 500 W limits or when legacy SMC footprint is standardized; not drop-in compatible. |
Compared with SMAJ75CE3/TR13, the Vishay SMAJ75CA-E3/5B offers identical electrical and mechanical specs for seamless second sourcing, while the ON Semiconductor 1.5SMC75CA delivers higher pulse power at the cost of larger board area and non-interchangeable packaging.
Availability
SMAJ75CE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, telecom DC feeder lines, and automotive body control modules requiring stable component supply, RoHS compliance, and IEC61000-4-5 Class 3 surge immunity.
Supply support for SMAJ75CE3/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 developed specifically for surface-mount transient voltage suppression in space-constrained, high-surge environments - emphasizing low clamping voltage, fast response, and robust thermal performance in DO-214AC packaging.
FAQ
What does the "C" and "E3" suffix mean in SMAJ75CE3/TR13?
The "C" denotes bidirectional configuration, meaning the SMAJ75CE3/TR13 clamps symmetrically for both positive and negative transients without polarity dependence. The "E3" indicates RoHS compliance with annealed matte-tin plating, verified per JEDEC J-STD-020B Level 1 moisture sensitivity - eliminating dry-pack requirements and supporting lead-free reflow.
Is SMAJ75CE3/TR13 suitable for IEC61000-4-5 Class 4 lightning protection?
No - SMAJ75CE3/TR13 is rated for IEC61000-4-5 Class 3 (42 Ω source) and Class 2 (12 Ω source) secondary lightning protection only. Its 134 A IPP and 125 V VC meet Class 3 requirements (1 kV open-circuit, 42 Ω source), but Class 4 (4 kV, 12 Ω) demands higher current handling beyond its 500 W rating.
What is the thermal resistance and maximum power dissipation of SMAJ75CE3/TR13?
SMAJ75CE3/TR13 has a junction-to-lead thermal resistance of 15 °C/W and delivers 5 W steady-state power dissipation at lead temperature (TL) = 75 °C. At ambient temperature (TA) = 25 °C on FR4 with recommended footprint, it sustains 1.56 W - values confirmed in Microsemi MSC0270A Rev L datasheet Figure 3 derating curve.
Does SMAJ75CE3/TR13 have polarity markings on the package?
No - SMAJ75CE3/TR13 is a bidirectional TVS and carries no cathode band or polarity marking, as both terminals perform identically. This eliminates orientation errors during automated placement and simplifies layout for AC-coupled or floating DC interfaces where polarity is undefined.
What is the clamping voltage of SMAJ75CE3/TR13 under a 10/1000 µs surge?
The maximum clamping voltage (VC) of SMAJ75CE3/TR13 is 125 V when subjected to its rated 134 A peak pulse current (IPP) under the standard 10/1000 µs double-exponential waveform - a value measured and guaranteed per Microsemi MSC0270A Rev L datasheet Table on Page 3.
SMAJ75CE3/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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 134V
- Current - Peak Pulse (10/1000µs):
- 3.7A
- 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)
SMAJ75CE3/TR13 FAQ
1.How can I place an order for SMAJ75CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ75CE3/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 SMAJ75CE3/TR13 reliable?
The price and inventory of SMAJ75CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ75CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ75CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ75CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ75CE3/TR13?
SMAJ75CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ75CE3/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 SMAJ75CE3/TR13?
For technical support, including SMAJ75CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ75CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ75CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ75CE3/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 SMAJ75CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ75CE3/TR13?
All SMAJ75CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ75CE3/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 SMAJ75CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ75CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ75CE3/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…
