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Vishay General Semiconductor - Diodes Division SMAJ16AHM3_A/H
- Part No.:
- SMAJ16AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ16AHM3_A/H.pdf
- Description:
- TVS DIODE 16VWM 26VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,200
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Product details
Overview
SMAJ16AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 16 V standoff voltage (VWM), 17.8–19.7 V breakdown voltage (VBR) at 1 mA, 26.0 V maximum clamping voltage (VC) at 15.4 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform), suitable for protecting MOSFETs and ICs in automotive power supplies.
For engineers reviewing the SMAJ16AHM3_A/H datasheet, SMAJ16AHM3_A/H pinout, SMAJ16AHM3_A/H application, or SMAJ16AHM3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), and compliance with UL 497B surge protector classification under file E136766.
Technical Context
This TVS diode operates as a fast-acting shunt-clamping device triggered by overvoltage events exceeding its reverse standoff voltage (VWM = 16 V). Its glass-passivated junction enables sub-nanosecond response time and low incremental surge resistance, critical for suppressing ESD and inductive switching spikes.
The device is rated for repetitive 10/1000 μs surges at 400 W up to 78 V and derates to 300 W above that threshold. It supports operating junction temperatures from –55 °C to +150 °C and meets J-STD-020 MSL Level 1 with 260 °C reflow peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min/max | 17.8 V / 19.7 V at 1 mA - Confirmed breakdown range ensures reliable turn-on within specification across process variation. |
| VC @ IPPM | 26.0 V at 15.4 A - Clamping voltage during 10/1000 μs transient; determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - Peak pulse power handling capability with standardized waveform; defines transient energy absorption limit. |
| ID @ VWM | 1.0 μA - Reverse leakage current at standoff voltage; low value minimizes standby power loss and avoids false triggering. |
| TJ max | +150 °C - Maximum junction temperature rating; enables use in under-hood automotive environments and high-ambient industrial settings. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs PCB thermal design requirements. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surge (e.g., accidental reverse bias). |
| Cathode | Reverse-biased clamping terminal | Connected to higher-potential side; initiates avalanche breakdown when transient exceeds VWM, shunting current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test conditions. |
| Halogen-free & RoHS-compliant | HM3 suffix denotes halogen-free molding compound and full RoHS compliance, meeting automotive and industrial environmental mandates. |
| 400 W peak pulse power | Withstands 10/1000 μs transients up to 400 W on circuits ≤78 V, enabling robust protection without external heat sinking. |
| UL 497B recognized | Underwriters Laboratory file E136766 confirms suitability as a classified surge protector for telecom and data line applications. |
| MSL Level 1 | Zero moisture sensitivity; supports standard SMT reflow without baking or special handling (peak 260 °C). |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Suppressing load-dump and jump-start transients on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp spikes above 16 V. Use Value: Limits voltage seen by downstream DC-DC converters and microcontrollers to ≤26.0 V, preventing latch-up or permanent damage. |
Use Scenario: Protecting analog outputs of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (cathode grounded) clamps both positive and negative transients on 4–20 mA loop lines. Use Value: Withstands >15 A surge current while maintaining <26.0 V clamping, preserving sensor accuracy and ADC input integrity. |
| Consumer USB Power Input Protection | Telecom Ethernet PHY Interface Protection |
|
Use Scenario: Guarding 5 V USB VBUS lines against ESD and hot-plug overshoot in portable docking stations. IC Role / Device Role / Timing Role: Fast-response unidirectional TVS placed between VBUS and GND, leveraging sub-ns turn-on to suppress ±8 kV contact ESD. Use Value: Low 1.0 μA leakage avoids battery drain; 26.0 V clamping prevents overvoltage stress on USB switch ICs and PMICs. |
Use Scenario: Shielding 10/100BASE-TX transformer-coupled PHY pins from lightning-induced surges and induced noise. IC Role / Device Role / Timing Role: TVS array component used per differential pair (e.g., TX+/TX–), configured with cathodes tied to local ground plane. Use Value: 400 W pulse rating handles IEC 61000-4-5 Level 4 surges; UL recognition supports safety-certified telecom equipment designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ16AHE3_A/H | Same electrical specs but RoHS-compliant commercial grade (non-halogen-free); lacks halogen-free certification. | Approved for non-automotive industrial and consumer use where halogen-free mandate does not apply. | Select SMAJ16AHE3_A/H when halogen-free requirement is absent and cost optimization is prioritized. |
| SMAJ16AHE3_A/I | Identical electrical and material specs; differs only in packaging-13" tape-and-reel (7500 pcs) vs. 7" reel (1800 pcs) for SMAJ16AHM3_A/H. | No functional difference; suited for high-volume SMT lines requiring larger reels to reduce changeover frequency. | Choose SMAJ16AHE3_A/I for automated production runs exceeding 5,000 units per batch. |
Compared with SMAJ16AHE3_A/H and SMAJ16AHE3_A/I, the SMAJ16AHM3_A/H uniquely combines halogen-free construction, AEC-Q101 qualification, and 7" tape-and-reel packaging-making it the only option certified for automotive under-hood deployment with full environmental compliance and optimized for mid-volume assembly.
Availability
SMAJ16AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom infrastructure requiring stable component supply with AEC-Q101 validation and halogen-free compliance.
Supply support for SMAJ16AHM3_A/H 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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The SMAJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where robustness against ESD, lightning, and inductive switching is mission-critical.
FAQ
What is the clamping voltage of SMAJ16AHM3_A/H at its rated peak pulse current?
The SMAJ16AHM3_A/H has a maximum clamping voltage (VC) of 26.0 V at its specified peak pulse current (IPPM) of 15.4 A under the 10/1000 μs waveform condition. This value is measured per ANSI/IEEE C62.35 standards and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ16AHM3_A/H maintains this clamping performance across its qualified operating temperature range.
Is SMAJ16AHM3_A/H qualified for automotive applications?
Yes, SMAJ16AHM3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in the 88390 datasheet. This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, making SMAJ16AHM3_A/H suitable for under-hood and chassis-mounted automotive electronics where reliability under thermal and electrical stress is mandatory.
What does the 'HM3' suffix indicate in SMAJ16AHM3_A/H?
The 'HM3' suffix in SMAJ16AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from 'HE3' (RoHS-compliant, AEC-Q101, but not halogen-free) and 'E3'/'M3' (commercial-grade, non-automotive). The HM3 marking ensures compliance with automotive environmental standards such as ELV and JIG-STD-020.
Can SMAJ16AHM3_A/H be used in bidirectional protection circuits?
No-SMAJ16AHM3_A/H is a unidirectional TVS diode, identified by the 'A' (not 'CA') suffix and cathode band marking. For bidirectional operation, Vishay specifies parts with 'CA' suffixes (e.g., SMAJ16CA). Using SMAJ16AHM3_A/H in bidirectional configurations would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.
What is the thermal resistance and how does it affect PCB layout for SMAJ16AHM3_A/H?
SMAJ16AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures during repetitive surges, PCB layout must provide adequate copper area and minimize trace length to ground. Reducing RθJA via larger pads or internal ground planes directly improves surge endurance and long-term reliability of SMAJ16AHM3_A/H.
SMAJ16AHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 15.4A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ16AHM3_A/H FAQ
1.How can I place an order for SMAJ16AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ16AHM3_A/H 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 SMAJ16AHM3_A/H reliable?
The price and inventory of SMAJ16AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ16AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ16AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ16AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ16AHM3_A/H?
SMAJ16AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ16AHM3_A/H 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 SMAJ16AHM3_A/H?
For technical support, including SMAJ16AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ16AHM3_A/H requirements.
6.How does Aetrix verify that SMAJ16AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ16AHM3_A/H 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 SMAJ16AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ16AHM3_A/H?
All SMAJ16AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ16AHM3_A/H, 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 SMAJ16AHM3_A/H part is unused and in its original packaging.
Return procedure for SMAJ16AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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