My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ15HE3/61
- Part No.:
- SMAJ15HE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ15HE3/61.pdf
- Description:
- TVS DIODE 15VWM 26.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,101
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ15HE3/61 from Vishay General Semiconductor is a high-reliability, AEC-Q101-qualified unidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for automotive and industrial overvoltage protection. It features a 15 V stand-off voltage (VWM), 26.9 V maximum clamping voltage (VC) at 14.9 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the SMAJ15HE3/61 datasheet, SMAJ15HE3/61 pinout, SMAJ15HE3/61 application, or SMAJ15HE3/61 equivalent, this device serves as a robust, RoHS-compliant, high-whisker-resistance (JESD 201 Class 2) protection solution for 12 V automotive signal lines, MOSFET gate drivers, and sensor interfaces subject to ISO 7637-2 and IEC 61000-4-5 transients.
Technical Context
The SMAJ15HE3/61 employs a glass-passivated silicon junction optimized for fast response (<1 ps) to ESD and surge events, with low incremental surge resistance enabling precise clamping under repetitive 10/1000 µs pulses. Its thermal resistance (RθJA = 120 °C/W) and junction temperature range (–55 °C to +150 °C) support operation in under-hood automotive environments.
As an AEC-Q101 qualified part, it meets stringent reliability requirements including MSL Level 1 (260 °C reflow), solder dip tolerance (260 °C, 40 s), and whisker resistance per JESD 201 Class 2 - distinguishing it from commercial-grade E3-suffix variants. Polarity is marked by a cathode band on the unidirectional device.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; matches nominal 12 V automotive supply rails with margin. |
| VC @ IPPM | 26.9 V - Clamped voltage during 14.9 A 10/1000 µs surge; ensures protected ICs see <27 V stress during ISO 7637-2 Pulse 1/2a. |
| IPPM | 14.9 A - Peak surge current capability at rated clamping voltage; validated on 5.0 × 5.0 mm copper pads per JEDEC standards. |
| PPPM | 400 W - Peak pulse power handling with 10/1000 µs waveform; derates to 300 W above 78 V, but fully applicable at 15 V. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in engine control units and powertrain modules without derating. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance; defines required PCB copper area for thermal management in sealed enclosures. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD22-B102. Cathode indicated by a visible band on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (cathode-banded end is opposite) | Connected to ground or low-impedance return path; conducts surge current away from protected line during reverse-biased clamping. |
| Cathode | Marked terminal (band side) | Connected to protected signal or power line; reverse-biased during normal operation, avalanches at VBR ≥16.7 V to clamp transients. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood applications including temperature cycling, mechanical shock, and humidity testing per stress test standard. |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth under high-temperature/humidity bias, eliminating risk of latent short circuits in long-life automotive systems. |
| Glass-passivated chip junction | Ensures stable leakage current (<1 µA at VWM) and repeatable breakdown behavior across 15+ year service life. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard 260 °C reflow without popcorn cracking or delamination. |
| 400 W 10/1000 µs pulse rating | Provides margin against ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Combination Wave (1.2/50 µs + 8/20 µs) surges. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins connected to 12 V battery-supplied sensor harnesses exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp negative-going spikes and positive load dump overshoots. Use Value: Limits voltage seen by downstream 3.3 V or 5 V logic to ≤26.9 V, preventing latch-up or oxide damage during 100 V/50 ms load dump events. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA current loops) and digital inputs (e.g., proximity switches) in factory automation PLC modules. IC Role / Device Role / Timing Role: Standoff-connected TVS on field-side signal traces to absorb inductive kickback from solenoid valves and relay coils. Use Value: Maintains signal integrity by clamping transients within 1 ns while adding <0.5 pF capacitance - negligible for DC and low-frequency industrial signals. |
| Automotive Body Control Module (BCM) | DC-DC Converter Input Stage |
Use Scenario: Input protection for BCM power management ICs receiving switched 12 V from door modules, lighting controllers, and HVAC actuators. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main 12 V rail upstream of buck converters and LDOs. Use Value: Withstands repetitive 400 W surges at 0.01% duty cycle, enabling reliable operation during frequent ignition cycling and alternator regulation faults. |
Use Scenario: Input-side transient suppression for 24 V to 5 V isolated flyback converters powering infotainment head units and ADAS camera modules. IC Role / Device Role / Timing Role: First-line defense against conducted noise and coupling from adjacent high-current motor drives. Use Value: Low Rsurge and tight VC tolerance ensure converter input capacitors are not overstressed, reducing need for oversized bulk capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15AHE3/61 | Lower VBR (16.7–18.5 V vs. 16.7–20.4 V), tighter VWM tolerance (±0% vs. ±0%), lower VC (24.4 V vs. 26.9 V) at same IPPM. | Better suited for tighter-clamp designs where protected IC absolute maximum rating is <25 V. | Select SMAJ15AHE3/61 when clamping margin below 25 V is critical; SMAJ15HE3/61 offers higher VBR consistency for noisy 12 V rails. |
| SMBJ15HE3/61 | Same electrical specs but SMB (DO-214AA) package - 2.5 mm wider, 0.3 mm thicker, 2× higher PPPM derating margin due to larger thermal mass. | Preferred for high-temperature zones (>105 °C ambient) or where board space allows larger footprint. | Choose SMBJ15HE3/61 for enhanced thermal performance in engine bay modules; SMAJ15HE3/61 prioritizes compactness in space-constrained BCM layouts. |
Compared with SMAJ15AHE3/61, the SMAJ15HE3/61 provides higher breakdown voltage consistency for noisy 12 V systems, while compared with SMBJ15HE3/61, it delivers identical protection in a 30% smaller footprint - critical for dense automotive PCBs where thermal margin is managed via layout rather than package size.
Availability
SMAJ15HE3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and DC-DC converter input protection requiring stable component supply, AEC-Q101 compliance, and long-term lifecycle continuity.
Supply support for SMAJ15HE3/61 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMAJ series is engineered specifically for automotive-grade transient suppression, combining AEC-Q101 qualification, high-temperature operation, and precise clamping to protect sensitive electronics in harsh vehicular environments.
FAQ
What is the clamping voltage of SMAJ15HE3/61 at its rated peak pulse current?
The SMAJ15HE3/61 has a maximum clamping voltage (VC) of 26.9 V at 14.9 A peak pulse current (IPPM) with a 10/1000 µs waveform, measured on standard 5.0 × 5.0 mm copper pads. This value ensures protected circuitry remains below critical voltage thresholds during standardized surge events such as ISO 7637-2 Pulse 1 and Pulse 5a. The SMAJ15HE3/61 maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C).
Is SMAJ15HE3/61 suitable for automotive applications requiring AEC-Q101 qualification?
Yes, SMAJ15HE3/61 is explicitly AEC-Q101 qualified and designated as high-reliability/automotive grade (HE3 suffix). It undergoes rigorous stress testing including temperature cycling, high-temperature operating life, and mechanical shock per AEC-Q101 Rev D. The SMAJ15HE3/61 also meets JESD 201 Class 2 whisker resistance and MSL Level 1 reflow compatibility - all documented in Vishay's official qualification report for the SMAJ family.
How does the HE3 suffix differ from the E3 suffix in SMAJ15HE3/61?
The HE3 suffix in SMAJ15HE3/61 denotes high-reliability/automotive grade with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance, whereas E3 indicates commercial-grade RoHS compliance only. SMAJ15HE3/61 is screened for extended temperature operation (–55 °C to +150 °C), subjected to additional reliability testing, and manufactured under stricter process controls. The SMAJ15HE3/61 is not interchangeable with SMAJ15E3/61 in safety-critical automotive designs.
What is the standoff voltage (VWM) and why is it important for SMAJ15HE3/61?
The standoff voltage (VWM) of SMAJ15HE3/61 is 15 V - the maximum DC or continuous reverse voltage the device can withstand without entering avalanche breakdown. This parameter ensures the SMAJ15HE3/61 remains non-conductive during normal 12 V automotive system operation while providing sufficient margin above nominal rail voltage. Selecting a VWM too close to the supply risks leakage-induced heating; 15 V is optimal for 12 V systems per industry practice and AEC-Q101 recommendations.
Can SMAJ15HE3/61 be used in bi-directional protection configurations?
No, SMAJ15HE3/61 is a unidirectional TVS diode, identifiable by its cathode band marking. For bi-directional transient suppression, Vishay specifies CA-suffixed parts (e.g., SMAJ15CAHE3/61). Using SMAJ15HE3/61 in bi-directional applications would leave the forward-biased polarity unprotected, risking permanent failure during positive transients. Always match device polarity - unidirectional SMAJ15HE3/61 for DC-biased lines, bi-directional variants for AC or floating signal paths.
SMAJ15HE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 14.9A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ15HE3/61 FAQ
1.How can I place an order for SMAJ15HE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ15HE3/61 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 SMAJ15HE3/61 reliable?
The price and inventory of SMAJ15HE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ15HE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ15HE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ15HE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ15HE3/61?
SMAJ15HE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ15HE3/61 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 SMAJ15HE3/61?
For technical support, including SMAJ15HE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ15HE3/61 requirements.
6.How does Aetrix verify that SMAJ15HE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ15HE3/61 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 SMAJ15HE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ15HE3/61?
All SMAJ15HE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ15HE3/61, 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 SMAJ15HE3/61 part is unused and in its original packaging.
Return procedure for SMAJ15HE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ15HE3/61 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
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
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…
