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Vishay General Semiconductor - Diodes Division SMA5J24CAHM3/H
- Part No.:
- SMA5J24CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J24CAHM3/H.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,395
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Product details
Overview
SMA5J24CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on signal and power lines. It features a 24 V standoff voltage (VWM), 38.9 V clamping voltage (VC) at 12.9 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect automotive sensor interfaces, industrial I/O ports, and telecom line drivers against ESD and load dump transients.
For engineers reviewing the SMA5J24CAHM3/H datasheet, SMA5J24CAHM3/H pinout, SMA5J24CAHM3/H application, or SMA5J24CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, and thermal resistance (RθJA = 80 °C/W) for surface-mount PCB designs requiring robust transient immunity without polarity constraints.
Technical Context
This device operates as a voltage-clamped shunt protector: during overvoltage events exceeding its breakdown threshold (VBR = 26.7–29.5 V), it transitions from high-impedance to low-impedance state within <1 ns, diverting surge current away from downstream circuitry. Its bidirectional symmetry ensures identical clamping behavior for positive and negative transients.
Designed for surface-mount assembly on standard 0.2" × 0.2" copper pads, the SMA5J24CAHM3/H leverages glass-passivated junction technology and meets MSL Level 1 (260 °C reflow peak), enabling compatibility with automated placement and lead-free soldering processes while maintaining stable leakage (<1 μA at VWM) across -55 °C to +150 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 26.7 V / 29.5 V - Breakdown occurs within this band at 1 mA test current; ensures predictable turn-on under surge conditions. |
| VC @ IPPM | 38.9 V - Clamped voltage at 12.9 A peak pulse current; limits stress on protected ICs during 500 W transient events. |
| PPPM | 500 W - Peak pulse power handling with 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surge immunity testing. |
| IPPM | 12.9 A - Maximum non-repetitive surge current the device can safely clamp; derived from PPPM/VC ratio. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures. |
| RθJA | 80 °C/W - Junction-to-ambient thermal resistance; informs PCB copper pad sizing and airflow requirements for sustained surge duty cycles. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional - no polarity marking; symmetrical two-terminal construction with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both terminals function identically; bidirectional conduction allows single-device protection of AC-coupled or floating lines without orientation concern. |
| Case (body) | Thermal and mechanical interface | Plastic molded case provides UL 94 V-0 flammability rating and transfers heat to PCB copper pads; no electrical connection. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential pairs, AC signal lines, or ungrounded buses without polarity constraints. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules, ADAS sensors, and body electronics subject to harsh thermal and vibration profiles. |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and eliminates corrosive halogen emissions during PCB rework or end-of-life incineration. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 pulses), improving protection margin for sensitive analog front-ends. |
| MSL Level 1 moisture sensitivity | Allows indefinite floor life before reflow; eliminates baking requirement and simplifies SMT line logistics. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and temperature/pressure sensor outputs in engine compartments exposed to load dump and jump-start surges. IC Role / Device Role: Bidirectional shunt TVS placed between signal line and ground to clamp transients up to ±500 W without polarity reversal. Use Value: Maintains signal integrity under ISO 16750-2 Pulse 5a (load dump) and IEC 61000-4-5 4 kV surge tests while meeting AEC-Q101 reliability requirements. | Use Scenario: Safeguarding PLC digital input channels connected to 24 V DC field wiring subject to inductive switching spikes and lightning-induced surges. IC Role / Device Role: Primary overvoltage clamp on each input channel, mounted directly at connector entry point to minimize inductance. Use Value: Limits transient voltage to ≤38.9 V during 12.9 A surges, preventing damage to optocoupler inputs and microcontroller GPIOs rated for 36 V absolute maximum. |
| Telecom Line Driver Protection | Consumer USB Port ESD Suppression |
Use Scenario: Shielding RS-485 transceivers in base station backhaul equipment from induced surges on long outdoor cable runs. IC Role / Device Role: Bidirectional TVS across differential pair (A/B lines) and to ground, providing common-mode and differential-mode suppression. Use Value: Withstands repeated 500 W surges per IEC 61000-4-5 while maintaining <1 μA leakage at 24 V, preserving signal-to-noise ratio in high-speed data links. | Use Scenario: Adding secondary-level surge protection to USB 2.0 VBUS and D+/D− lines in smart home hubs exposed to user-handling ESD and AC adapter transients. IC Role / Device Role: Low-capacitance bidirectional clamp on each line, placed after primary ESD diodes to handle higher-energy events. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) and 1 kV line surge (IEC 61000-4-5) without degrading 480 Mbps data integrity due to symmetrical low-VC response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J24CAHE3/H | Same electrical specs and package; uses RoHS-compliant (non-halogen-free) molding compound; not AEC-Q101 qualified. | Suitable for commercial/industrial use where halogen-free mandate or automotive qualification is not required. | Select SMA5J24CAHE3/H when cost optimization is prioritized and AEC-Q101/halogen-free compliance is unnecessary. |
| SMA6J24CA-M3 | 600 W PPPM, same VWM/VC; larger SMA package variant with higher surge rating but identical footprint and pinout. | Used where higher single-event energy tolerance (e.g., >500 W) is mandated by system-level surge standards. | Choose SMA6J24CA-M3 only if design requires ≥600 W peak pulse power; otherwise SMA5J24CAHM3/H offers optimal cost-performance balance. |
Compared with SMA5J24CAHE3/H, the SMA5J24CAHM3/H adds halogen-free construction and AEC-Q101 qualification without sacrificing clamping performance or board space; versus SMA6J24CA-M3, it trades 100 W lower PPPM for tighter thermal profile and lower unit cost in volume production.
Availability
SMA5J24CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O protection, and telecom line driver applications requiring stable component supply with guaranteed halogen-free and AEC-Q101-compliant sourcing.
Supply support for SMA5J24CAHM3/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 space-constrained surface-mount designs, targeting automotive, industrial, and telecom systems where robustness against repetitive surge events is critical.
FAQ
What is the clamping voltage of the SMA5J24CAHM3/H under a 10/1000 µs surge?
The SMA5J24CAHM3/H has a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current of 12.9 A using a 10/1000 µs waveform. This value is measured per JEDEC standards and ensures downstream components see limited overvoltage stress during standardized surge events. The SMA5J24CAHM3/H maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is the SMA5J24CAHM3/H suitable for automotive applications?
Yes, the SMA5J24CAHM3/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction validated for automotive use. It is specified for under-hood and cabin applications including engine control units, ADAS sensor interfaces, and body electronics where reliability under thermal cycling, vibration, and high-energy transients is mandatory. The SMA5J24CAHM3/H meets all stress-test requirements defined in the AEC-Q101 standard.
Does the SMA5J24CAHM3/H have polarity markings?
No, the SMA5J24CAHM3/H is a bidirectional TVS diode and carries no polarity marking on its SMA (DO-214AC) package. Its symmetrical internal structure allows installation in either orientation on the PCB, simplifying layout and eliminating risk of reverse placement. This feature is intrinsic to all CA-suffix devices in the SMA5J family, including the SMA5J24CAHM3/H.
What is the maximum junction temperature rating for the SMA5J24CAHM3/H?
The SMA5J24CAHM3/H has a maximum junction temperature (TJ) rating of +150 °C, enabling reliable operation in high-temperature environments such as automotive engine bays, industrial motor drives, and enclosed telecom equipment. This rating is supported by its glass-passivated chip junction and thermal resistance of 80 °C/W (junction-to-ambient, on recommended 0.2" × 0.2" copper pads), allowing thermal design validation for continuous or intermittent surge duty cycles.
How does the HM3 suffix differ from the HE3 suffix in the SMA5J24CA series?
The HM3 suffix on the SMA5J24CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification, whereas the HE3 suffix indicates RoHS compliance and AEC-Q101 qualification but without halogen-free material content. Both share identical electrical characteristics and package dimensions, but the SMA5J24CAHM3/H satisfies stricter environmental mandates applicable to automotive Tier 1 suppliers and green electronics initiatives.
SMA5J24CAHM3/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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 12.9A
- 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)
SMA5J24CAHM3/H FAQ
1.How can I place an order for SMA5J24CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J24CAHM3/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 SMA5J24CAHM3/H reliable?
The price and inventory of SMA5J24CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J24CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMA5J24CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J24CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J24CAHM3/H?
SMA5J24CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J24CAHM3/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 SMA5J24CAHM3/H?
For technical support, including SMA5J24CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J24CAHM3/H requirements.
6.How does Aetrix verify that SMA5J24CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMA5J24CAHM3/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 SMA5J24CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMA5J24CAHM3/H?
All SMA5J24CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J24CAHM3/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 SMA5J24CAHM3/H part is unused and in its original packaging.
Return procedure for SMA5J24CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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