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Microchip Technology SMAJ100E3/TR13
- Part No.:
- SMAJ100E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ100E3/TR13.pdf
- Description:
- TVS DIODE 100VWM 179VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,817
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Product details
Overview
SMAJ100E3/TR13 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for 100 V working peak standoff voltage protection in DC power rails and signal lines. It delivers 500 W peak pulse power at 10/1000 µs, clamps transients to ≤179 V at 1.62 A, and operates from –65 °C to +150 °C - deployed in industrial power supplies and telecom interface circuits.
For engineers reviewing the SMAJ100E3/TR13 datasheet, SMAJ100E3/TR13 pinout, SMAJ100E3/TR13 application, or SMAJ100E3/TR13 equivalent, key selection criteria include clamping voltage (VC = 179 V), standoff voltage (VWM = 100 V), peak pulse current (IPP = 1.62 A), RoHS-compliant "e3" termination, and DO-214AC package compatibility with standard SMT reflow profiles.
Technical Context
This TVS diode uses an avalanche breakdown mechanism to divert surge energy away from protected circuitry within <100 ps response time for unidirectional operation. Its junction-to-lead thermal resistance of 15 °C/W enables reliable power dissipation during repetitive 500 W transients under controlled PCB layout conditions.
The device complies with IEC61000-4-2 (ESD ±8 kV contact), IEC61000-4-4 (EFT ±2 kV), and IEC61000-4-5 secondary lightning (42 Ω source, Class 1 up to 100 V). Standby leakage remains ≤3.1 µA at 100 V, minimizing quiescent loading on sensitive analog or low-power digital nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 100 V - maximum continuous reverse voltage before conduction begins; defines operating margin above system nominal voltage. |
| VBR (Min) | 111 V @ 1 mA - guaranteed avalanche onset threshold; ensures predictable turn-on without premature leakage. |
| VC @ IPP | 179 V @ 1.62 A - clamped voltage during 10/1000 µs surge; determines maximum stress on downstream ICs. |
| PPP | 500 W - peak pulse power handling at 25 °C; defines single-event surge robustness per IEC61000-4-5. |
| ID @ VWM | ≤3.1 µA - reverse leakage at rated standoff; critical for battery-powered or high-impedance sensor interfaces. |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline with 2.57–2.79 mm body width and J-bend leads. |
| Operating Temp | –65 °C to +150 °C - qualified for extended industrial and automotive under-hood environments. |
Pinout & Package
DO-214AC (SMA) package with two terminals: cathode-marked lead (band) and anode. Mounting requires FR4 PCB with 1 oz copper and recommended pad layout (A = 1.70–2.26 mm, B = 3.99–4.50 mm per datasheet page 5).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge return path to ground | Connected to system ground plane; carries full transient current during clamping event. |
| Anode | Protected line input | Connected to line being protected (e.g., 100 V DC rail); reverse-biased during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant termination | Matte-tin plating per MIL-STD-750 Method 2026; supports lead-free reflow up to 260 °C for 10 s. |
| Fast response time | <100 ps theoretical turn-on; prevents ESD/EFT-induced latch-up or gate oxide damage in CMOS devices. |
| Low thermal resistance | 15 °C/W junction-to-lead; enables sustained 5 W steady-state dissipation at 75 °C lead temperature. |
| IEC61000-4-5 Class 1 rating | Validated for secondary lightning surges with 42 Ω source impedance up to 100 V standoff devices. |
| Moisture sensitivity | Level 1 per J-STD-020B; no dry-pack or bake-out required prior to assembly. |
Applications
| Industrial Power Supply Protection | Telecom Line Interface |
|---|---|
Use Scenario: 100 V DC input rail in programmable logic controller (PLC) power module exposed to inductive switching noise and load dump events. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp positive-going transients only. Use Value: Limits voltage excursion to ≤179 V during 500 W surges, preserving integrity of downstream DC-DC controllers and isolated gate drivers. | Use Scenario: RS-485 data line powered from local 100 V auxiliary supply in outdoor base station equipment. IC Role / Device Role / Timing Role: Standoff-rated TVS on power rail feeding RS-485 transceiver, protecting against induced RF and EFT coupling. Use Value: Maintains ≤3.1 µA leakage at 100 V, avoiding false triggering or bias shift in differential receiver inputs. |
| Automotive Body Control Module | Renewable Energy Inverter DC Link |
Use Scenario: 100 V battery-derived supply in BCM sub-system subjected to ISO 7637-2 pulse 1 and pulse 3a/b transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 100 V rail feeding microcontroller and CAN transceivers. Use Value: Withstands –65 °C to +150 °C ambient, enabling placement near heat-generating power stages without derating. | Use Scenario: DC link capacitor charging circuit in solar inverter where 100 V auxiliary supply powers gate drivers and sensors. IC Role / Device Role / Timing Role: Transient suppressor on 100 V auxiliary rail, coordinated with MOVs on main DC bus. Use Value: 500 W peak power rating handles repetitive switching surges without degradation, supporting >10-year field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ100A-E3/54 | Same VWM (100 V), identical DO-214AC package, but non-RoHS tin-lead plating; VC = 179 V, IPP = 1.62 A. | Not suitable for lead-free manufacturing; otherwise functionally interchangeable in legacy designs. | Select SMAJ100A-E3/54 only if tin-lead assembly process is retained and RoHS compliance is not required. |
| SMCJ100A | Higher power rating (1500 W), same VWM (100 V), larger DO-214AB (SMC) package; VC = 165 V, IPP = 4.85 A. | Requires PCB footprint change; used where higher surge immunity or longer lifetime under repeated stress is needed. | Choose SMCJ100A when system-level testing reveals insufficient margin with 500 W rating or when footprint allows larger case. |
Compared with SMAJ100E3/TR13, SMAJ100A-E3/54 offers identical electrical performance but lacks RoHS compliance, while SMCJ100A provides greater surge capacity at the cost of larger board area and different thermal management requirements.
Availability
SMAJ100E3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, telecom interface modules, and automotive body control units requiring stable component supply across multi-year production cycles.
Supply support for SMAJ100E3/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 space-constrained, high-surge environments - emphasizing fast response, repeatable clamping, and extended temperature operation without derating.
FAQ
What is the clamping voltage of SMAJ100E3/TR13 under a 10/1000 µs surge?
The SMAJ100E3/TR13 clamps to a maximum of 179 V when subjected to its rated peak pulse current of 1.62 A under the standardized 10/1000 µs waveform. This value is measured at the device terminals and defines the upper voltage limit imposed on protected circuitry during transient events.
Is SMAJ100E3/TR13 RoHS compliant and lead-free assembly compatible?
Yes, SMAJ100E3/TR13 carries the "e3" suffix indicating RoHS-compliant matte-tin plating, qualified for lead-free reflow soldering at 260 °C for 10 seconds per MIL-STD-750 Method 2026. Its moisture sensitivity level is Level 1, eliminating pre-bake requirements.
Does SMAJ100E3/TR13 meet IEC61000-4-5 for lightning surge protection?
Yes, SMAJ100E3/TR13 is certified for IEC61000-4-5 secondary lightning protection with 42 Ω source impedance at Class 1 level (up to 100 V standoff), delivering validated clamping performance under 1.2/50 µs open-circuit voltage and 8/20 µs current waveforms.
What is the maximum steady-state power dissipation of SMAJ100E3/TR13 on a standard PCB?
When mounted on an FR4 board with 1 oz copper and the recommended footprint, SMAJ100E3/TR13 dissipates up to 1.56 W continuously at 25 °C ambient temperature, or 5 W at 75 °C lead temperature - limited by its 15 °C/W junction-to-lead thermal resistance.
How does the unidirectional configuration of SMAJ100E3/TR13 affect circuit design?
The unidirectional configuration of SMAJ100E3/TR13 provides asymmetric protection: it clamps only positive transients relative to ground, making it ideal for DC rails where reverse polarity events are not expected. The cathode band must be oriented toward ground, and it exhibits negligible conduction below –1.5 V forward voltage.
SMAJ100E3/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):
- 100V
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 179V
- Current - Peak Pulse (10/1000µs):
- 2.8A
- 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)
SMAJ100E3/TR13 FAQ
1.How can I place an order for SMAJ100E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ100E3/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 SMAJ100E3/TR13 reliable?
The price and inventory of SMAJ100E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ100E3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ100E3/TR13?
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4.How is shipping managed for SMAJ100E3/TR13?
SMAJ100E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ100E3/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 SMAJ100E3/TR13?
For technical support, including SMAJ100E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ100E3/TR13 requirements.
6.How does Aetrix verify that SMAJ100E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ100E3/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 SMAJ100E3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ100E3/TR13?
All SMAJ100E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ100E3/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 SMAJ100E3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ100E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ100E3/TR13 Tags
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