My Inquiry
My Account
Microchip Technology SMAJ15E3/TR13
- Part No.:
- SMAJ15E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ15E3/TR13.pdf
- Description:
- TVS DIODE 15VWM 26.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,569
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ15E3/TR13 from Microsemi is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for primary and secondary surge protection in DC power rails and signal lines. It features a 15 V reverse standoff voltage (VWM), 16.7 V minimum breakdown voltage (VBR), clamps transients to ≤26.9 V at 18.8 A peak pulse current (IPP), and delivers 500 W peak pulse power (10/1000 µs). It is widely deployed in industrial power supplies, automotive body electronics, and telecom interface circuits.
For engineers reviewing the SMAJ15E3/TR13 datasheet, SMAJ15E3/TR13 pinout, SMAJ15E3/TR13 application, or SMAJ15E3/TR13 equivalent, key selection criteria include clamping voltage margin vs. protected IC's absolute maximum rating, IEC 61000-4-5 Class 4 compliance (12 Ω source), RoHS-compliant matte-tin plating, and compatibility with standard DO-214AC footprint and reflow profiles.
Technical Context
This TVS operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 16.7 V breakdown threshold (IBR = 1 mA), entering low-impedance clamping mode within <100 ps. Its 500 W peak power rating is validated under standardized 10/1000 µs double-exponential surge waveforms per IEC 61000-4-5.
The device uses a void-free thermosetting epoxy case (UL94V-0), C-bend leads with annealed matte-tin plating, and is rated for -65°C to +150°C operation. Thermal resistance is 15°C/W junction-to-lead and 80°C/W junction-to-ambient on FR4 with recommended pad layout - critical for sustained surge duty cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 15 V - Maximum continuous reverse voltage before leakage exceeds 1 µA; sets upper limit for protected line operating voltage. |
| VBR min @ IBR | 16.7 V @ 1 mA - Minimum voltage at which avalanche conduction begins; ensures reliable triggering above normal operating range. |
| VC @ IPP | 26.9 V @ 18.8 A - Clamped voltage during 10/1000 µs surge; must remain below downstream IC's absolute max rating (e.g., 30 V logic). |
| PPP | 500 W - Peak transient power dissipation capability; defines survivability against lightning-induced surges per IEC 61000-4-5. |
| IPP | 18.8 A - Peak current handled at VC; used with PCB trace impedance to estimate voltage overshoot before clamping engages. |
| TJ Range | -65°C to +150°C - Full operational and storage temperature range; supports under-hood automotive and industrial ambient conditions. |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with 2.57–2.79 mm width (C dimension); compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: DO-214AC (SMA), molded thermosetting epoxy case, UL94V-0 rated, cathode indicated by band on body. Leads are C-bend (modified J-bend) with RoHS-compliant matte-tin plating, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or lowest potential point; completes clamping path for positive transients on cathode-connected lines. |
| Cathode | Protected line input | Connected to the line being protected (e.g., 12 V rail); conducts surge current to anode when VAK > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 500 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 secondary lightning surges up to Class 4 (12 Ω source) without derating. |
| Clamping time <100 ps | Ensures sub-nanosecond response to ESD events (IEC 61000-4-2 ±8 kV contact), preventing latch-up or gate oxide damage in CMOS ICs. |
| RoHS-compliant "e3" suffix | Confirms matte-tin plating meets JEDEC J-STD-020B Level 1 moisture sensitivity - no dry pack required prior to assembly. |
| Unidirectional configuration | Provides asymmetric protection ideal for DC power rails where only positive-going transients require suppression (e.g., automotive battery lines). |
| Thermal resistance: 15°C/W (junction-to-lead) | Supports high-reliability operation under repeated surge stress when mounted on copper-pour PCBs with thermal vias. |
Applications
| Automotive Body Control Module (BCM) | Industrial 24 V DC Power Supply Input |
|---|---|
Use Scenario: Protects microcontroller I/O and LIN bus transceivers from load-dump and jump-start induced transients on 12 V battery lines. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and ground, clamping positive spikes to ≤26.9 V before they reach 3.3 V/5 V logic rails. Use Value: Prevents permanent damage to MCU GPIOs and LIN PHYs during ISO 7637-2 Pulse 5a (load dump), maintaining functional safety integrity. |
Use Scenario: Shields PLC analog input front-end (e.g., 4–20 mA loop receiver) from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V supply rail upstream of LDO regulators and precision ADCs. Use Value: Limits transient overshoot to <27 V, preserving 30 V-rated op-amps and SAR ADCs while meeting IEC 61000-4-5 Class 3 (42 Ω source) requirements. |
| Telecom Ethernet PHY Interface | Smart Meter RS-485 Communication Port |
Use Scenario: Guards 10/100BASE-TX magnetics center taps and PHY bias rails against ESD and fast transients coupled from unshielded cables. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on MDI side of transformer, referenced to local ground plane. Use Value: Achieves <100 ps response and <27 V clamping to prevent PHY latch-up during IEC 61000-4-2 ±8 kV contact discharge without signal integrity degradation. |
Use Scenario: Secures half-duplex RS-485 transceiver (e.g., MAX13487) against induced surges on long outdoor metering bus runs. IC Role / Device Role / Timing Role: Bidirectional protection not applicable - SMAJ15E3/TR13 used on VCC rail only, complementing bidirectional TVS on data lines. Use Value: Maintains stable 5 V supply to transceiver during IEC 61000-4-5 1 kV surge tests, avoiding brownout resets and communication loss. |
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 SMAJ15A | Same VWM (15 V), identical DO-214AC package, but non-RoHS tin-lead plating; VC = 24.4 V @ 20.6 A (slightly lower clamping). | Approved for legacy industrial designs requiring Pb-based solder compatibility; not suitable for new RoHS-compliant production. | Select SMAJ15A only if Pb-containing assembly process is mandated and matte-tin plating causes dewetting risk. |
| Vishay SMAJ15A-E3/5A | Identical RoHS-compliant matte-tin plating and DO-214AC package; VC = 26.9 V @ 18.8 A matches SMAJ15E3/TR13 exactly per datasheet Table 1. | Drop-in replacement in tape-and-reel format (5A = 5,000 pcs/reel); same IEC 61000-4-2/4-4/4-5 compliance profile. | Preferred for dual-sourcing; verify reel size (TR13 = 2,500 pcs) vs. Vishay's 5A (5,000 pcs) to align with SMT line planning. |
Compared with SMAJ15A (Pb-based) and SMAJ15A-E3/5A (Vishay), SMAJ15E3/TR13 offers guaranteed RoHS compliance, verified 2,500-piece TR13 tape-and-reel packaging, and Microsemi's avionics-grade screening option (MA prefix), making it optimal for high-reliability industrial and automotive programs requiring full material traceability.
Availability
SMAJ15E3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and telecom interface circuits requiring stable component supply across multi-year production cycles.
Supply support for SMAJ15E3/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 engineered specifically for surface-mount transient suppression in harsh environments - emphasizing low clamping voltage, fast response, and robust thermal performance in compact DO-214AC packages.
FAQ
What is the clamping voltage of SMAJ15E3/TR13 at its rated peak pulse current?
The SMAJ15E3/TR13 clamps to a maximum of 26.9 V when subjected to its rated 18.8 A peak pulse current (IPP) under the standard 10/1000 µs waveform. This value is measured per Figure 2 in the Microsemi MSC0270A datasheet and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SMAJ15E3/TR13 unidirectional or bidirectional, and how is polarity marked?
SMAJ15E3/TR13 is a unidirectional TVS diode, with cathode identified by a visible band on the epoxy body. Bidirectional variants use a "C" or "CA" suffix (e.g., SMAJ15CA); the absence of "C" confirms unidirectional operation, making it suitable for DC rail protection where only positive transients occur.
Does SMAJ15E3/TR13 meet IEC 61000-4-5 Class 4 requirements?
Yes - SMAJ15E3/TR13 supports IEC 61000-4-5 Class 4 (12 Ω source impedance) for secondary lightning protection, covering devices with VWM ≤12 V per the datasheet's classification table. While SMAJ15E3/TR13 has VWM = 15 V, it remains compliant for Class 4 when applied to systems with appropriate upstream impedance limiting.
What is the moisture sensitivity level (MSL) and reflow profile compatibility of SMAJ15E3/TR13?
SMAJ15E3/TR13 is rated MSL Level 1 per IPC/JEDEC J-STD-020B, meaning it may be stored indefinitely at ≤30°C/60% RH without dry packing. Its matte-tin plating supports standard lead-free reflow profiles up to 260°C for 10 seconds, fully compatible with Type 3 and Type 4 solder pastes.
Can SMAJ15E3/TR13 be used in place of SMAJ15A in existing designs?
Yes - SMAJ15E3/TR13 is a direct RoHS-compliant replacement for SMAJ15A, sharing identical electrical specs (VWM, VBR, VC, IPP) and DO-214AC mechanical dimensions. The "e3" suffix denotes matte-tin plating, and "TR13" specifies 2,500-piece tape-and-reel packaging; no PCB layout changes are needed.
SMAJ15E3/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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 26.9V
- Current - Peak Pulse (10/1000µs):
- 18.8A
- 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)
SMAJ15E3/TR13 FAQ
1.How can I place an order for SMAJ15E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ15E3/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 SMAJ15E3/TR13 reliable?
The price and inventory of SMAJ15E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ15E3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ15E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ15E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ15E3/TR13?
SMAJ15E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ15E3/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 SMAJ15E3/TR13?
For technical support, including SMAJ15E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ15E3/TR13 requirements.
6.How does Aetrix verify that SMAJ15E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ15E3/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 SMAJ15E3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ15E3/TR13?
All SMAJ15E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ15E3/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 SMAJ15E3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ15E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ15E3/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…
