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Vishay General Semiconductor - Diodes Division SMA5J22AHM3/H
- Part No.:
- SMA5J22AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J22AHM3/H.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,214
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Product details
Overview
SMA5J22AHM3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power and signal lines. It features a 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR at 1 mA), 35.5 V clamping voltage (VC) at 14.1 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform. It is halogen-free, RoHS-compliant, and qualified to AEC-Q101 for automotive applications.
For engineers reviewing the SMA5J22AHM3/H datasheet, SMA5J22AHM3/H pinout, SMA5J22AHM3/H application, or SMA5J22AHM3/H equivalent, key selection criteria include its unidirectional polarity, 150 °C maximum junction temperature, low incremental surge resistance, fast response time, and suitability for protecting MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive and industrial systems.
Technical Context
This TVS diode operates as a voltage-clamping device that remains high-impedance below VWM = 22 V and rapidly transitions to low-impedance conduction above VBR = 24.4–26.9 V to shunt surge energy. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
Designed for surface-mount assembly on 0.2" × 0.2" copper pads per terminal, it delivers 500 W peak pulse power dissipation with thermal resistance RθJA = 80 °C/W and RθJL = 25 °C/W, enabling effective heat transfer in compact PCB layouts without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - Confirmed breakdown threshold range ensuring consistent turn-on across production lots. |
| VC @ IPPM | 35.5 V at 14.1 A - Clamped voltage during 500 W 10/1000 µs surge; limits downstream component stress to safe levels. |
| PPPM | 500 W - Peak pulse power handling capability; supports robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| TJ max | +150 °C - Maximum junction temperature rating enabling operation in under-hood automotive environments. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with cathode band marking; compatible with automated pick-and-place. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C reflow peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to ground or lower-potential rail in unidirectional configuration; enables clamping when cathode-side voltage exceeds VBR. |
| Cathode (banded end) | Reverse-biased terminal | Connected to protected line (e.g., 24 V supply or sensor output); defines polarity and clamping direction. |
Key Features
| Feature | Design Value |
|---|---|
| Low profile SMA package | Enables placement in space-constrained automotive ECUs and industrial controllers without height interference. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term surge endurance over 1000+ pulses at rated conditions. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets automotive OEM material compliance requirements and supports environmentally regulated production programs. |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak without moisture sensitivity concerns. |
| Excellent clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage overshoot during fast transients, reducing risk of latch-up or gate oxide damage in protected ICs. |
Applications
| Automotive Power Supply Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 24 V power rails in engine control units (ECUs) and body control modules (BCMs) from load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and local regulator input to clamp transients before they reach LDOs or microcontrollers. Use Value: Withstands 500 W surges and clamps to ≤35.5 V, preventing regulator shutdown or MCU brownout during ISO 16750-2 load dump events. |
Use Scenario: Safeguarding analog outputs of pressure or temperature sensors connected to PLC I/O modules in factory automation. IC Role / Device Role / Timing Role: Bidirectional-capable protection element (though SMA5J22AHM3/H is unidirectional, used with series resistor for bidirectional-like behavior) on 0–10 V or 4–20 mA signal paths. Use Value: Fast response (<1 ns) and low leakage (<1 µA at 22 V) preserve signal integrity while suppressing EFT bursts per IEC 61000-4-4. |
| Telecom DC Power Interface | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Shielding PoE-powered devices (e.g., IP cameras) from surges entering via 48 V DC input ports. IC Role / Device Role / Timing Role: Primary overvoltage clamp on the DC input stage upstream of DC/DC converters and Ethernet PHYs. Use Value: 35.5 V clamping voltage ensures downstream 48 V-to-3.3 V converter input remains within absolute maximum ratings during lightning-induced surges. |
Use Scenario: Suppressing back-EMF spikes generated by brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to absorb inductive kickback energy during MOSFET commutation. Use Value: 500 W rating handles repetitive 10/1000 µs spikes up to 14.1 A, extending MOSFET lifetime and reducing EMI emissions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J22AHE3/H | Same electrical specs and package, but RoHS-compliant commercial grade (not AEC-Q101 qualified); uses E3 suffix instead of HM3. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select SMA5J22AHE3/H for cost-sensitive non-automotive applications requiring identical clamping performance. |
| SMCJ22A-H | Higher power rating (1500 W), larger SMC (DO-214AB) package, same VWM/VBR range; RθJA = 25 °C/W vs. 80 °C/W. | Better thermal performance and higher surge capacity; requires larger PCB footprint and different pad layout. | Choose SMCJ22A-H when system-level surge tests exceed 500 W or ambient temperatures exceed 105 °C. |
Compared with SMA5J22AHE3/H, SMA5J22AHM3/H adds halogen-free construction and AEC-Q101 qualification for automotive use; compared with SMCJ22A-H, it trades surge capacity and thermal efficiency for smaller size and lower profile-ideal for space-limited automotive modules.
Availability
SMA5J22AHM3/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power supply designs requiring stable component supply with full traceability and lifecycle management.
Supply support for SMA5J22AHM3/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, power density, and automotive-grade qualification.
The SMA5J series is engineered for high-power-density transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where compact size, AEC-Q101 compliance, and repeatable clamping performance are critical.
FAQ
What is the polarity configuration of the SMA5J22AHM3/H?
The SMA5J22AHM3/H is a unidirectional transient voltage suppressor diode. Its cathode is marked by a band on the SMA (DO-214AC) package body. When installed with the banded end toward the protected line and anode grounded, it conducts only during positive transients relative to ground-making it ideal for DC rail protection where polarity is fixed. This differs from bidirectional variants like SMA5J22CA, which suppress surges in both directions.
Does the SMA5J22AHM3/H meet automotive qualification standards?
Yes, the SMA5J22AHM3/H is fully qualified to AEC-Q101 for stress testing including HTGB, HTRB, TCT, and ESD. The "HM3" suffix explicitly denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. This qualification is verified per Vishay document 88875 (Rev. 09-Jan-2024) and applies to the exact SMA5J22AHM3/H ordering code-not inferred from family data.
What is the maximum clamping voltage of the SMA5J22AHM3/H under surge conditions?
The SMA5J22AHM3/H has a maximum clamping voltage (VC) of 35.5 V at 14.1 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in the Electrical Characteristics table of Vishay's datasheet 88875. It represents the upper limit of voltage seen by downstream components during worst-case surge events.
How does the SMA5J22AHM3/H compare to SMA5J22AHE3/H in terms of compliance and use cases?
The SMA5J22AHM3/H and SMA5J22AHE3/H share identical electrical parameters and SMA package, but differ in compliance: HM3 indicates halogen-free + RoHS + AEC-Q101, while HE3 indicates RoHS + AEC-Q101 without halogen-free assurance. Therefore, SMA5J22AHM3/H is required for automotive Tier 1 suppliers mandating halogen-free materials, whereas SMA5J22AHE3/H suffices for non-halogen-restricted AEC-Q101 applications.
What is the thermal resistance specification for the SMA5J22AHM3/H?
The SMA5J22AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W and junction-to-lead resistance (RθJL) of 25 °C/W, measured on 0.2" × 0.2" copper pads per terminal. These values are defined in the Thermal Characteristics section of Vishay's datasheet 88875 and directly impact power derating above 25 °C ambient-critical for under-hood automotive deployment where ambient may reach 125 °C.
SMA5J22AHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 14.1A
- Power - Peak Pulse:
- 500W
- 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)
SMA5J22AHM3/H FAQ
1.How can I place an order for SMA5J22AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J22AHM3/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 SMA5J22AHM3/H reliable?
The price and inventory of SMA5J22AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J22AHM3/H is usually 5 days.
3.What payment methods are accepted for SMA5J22AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J22AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J22AHM3/H?
SMA5J22AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J22AHM3/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 SMA5J22AHM3/H?
For technical support, including SMA5J22AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J22AHM3/H requirements.
6.How does Aetrix verify that SMA5J22AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMA5J22AHM3/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 SMA5J22AHM3/H meets industry standards.
7.What is the process for return or replacement of SMA5J22AHM3/H?
All SMA5J22AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J22AHM3/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 SMA5J22AHM3/H part is unused and in its original packaging.
Return procedure for SMA5J22AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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