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Vishay General Semiconductor - Diodes Division SMA5J7.5AHM3/H
- Part No.:
- SMA5J7.5AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J7.5AHM3/H.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,496
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Product details
Overview
SMA5J7.5AHM3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for primary overvoltage protection of DC power rails and signal lines. It features 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1 mA, 12.9 V maximum clamping voltage (VC) at 38.8 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 μs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces against inductive switching transients in automotive and industrial control systems.
For engineers reviewing the SMA5J7.5AHM3/H datasheet, SMA5J7.5AHM3/H pinout, SMA5J7.5AHM3/H application, or SMA5J7.5AHM3/H equivalent, key selection criteria include clamping performance under 38.8 A surge, thermal resistance (RθJA = 80 °C/W), AEC-Q101 qualification status, halogen-free RoHS compliance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 8.33–9.21 V breakdown range. Its glass-passivated junction ensures stable leakage (<1.0 μA at 7.5 V) and fast response time (<1.0 ps), enabling effective suppression of ESD and load-dump transients.
Rated for -55 °C to +150 °C junction temperature, it delivers 500 W peak pulse power under standardized 10/1000 μs waveform conditions when mounted per recommended pad layout. The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification - critical for automotive-grade reliability in engine control units and body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse operating voltage before clamping begins; sets safe DC rail margin for 12 V automotive systems. |
| VBR (min/max) | 8.33 V / 9.21 V at 1.0 mA - defines precise avalanche onset window; ensures predictable triggering without premature conduction. |
| VC @ IPPM | 12.9 V at 38.8 A - clamping voltage during full-rated surge; limits protected circuit stress below 13.5 V threshold for most 12 V logic and analog ICs. |
| PPPM | 500 W - peak transient energy handling capacity with 10/1000 μs waveform; supports robust protection against ISO 7637-2 Pulse 1 & 2a events. |
| ID @ VWM | <1.0 μA - ultra-low reverse leakage at rated stand-off; prevents measurable power loss or bias shift in high-impedance sensor circuits. |
| RθJA | 80 °C/W - junction-to-ambient thermal resistance; requires minimum 5.0 mm × 5.0 mm copper pad per terminal for full derating to 150 °C TJ max. |
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. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / low-side reference | Connected to ground or lower-potential node; forms return path during clamping; must be routed with low-inductance ground plane. |
| Cathode | Protected line input / high-side connection | Connected to line under protection (e.g., 12 V supply rail); reverse-biased during normal operation; avalanches to shunt surge to ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, infotainment, and ADAS sensors - meets stress test requirements for temperature cycling, HTRB, and ESD. |
| Halogen-free & RoHS-compliant (HM3) | Meets IEC 61249-2-21 and JEDEC J-STD-20 MSL level 1 (260 °C peak reflow); supports lead-free manufacturing and environmental compliance programs. |
| Low incremental surge resistance | Enables tight VC-VBR differential (≤4.6 V), minimizing voltage overshoot during fast transients and improving system-level immunity. |
| Glass passivated junction | Provides stable VBR tolerance and long-term reliability under thermal cycling; eliminates risk of junction corrosion in humid or chemically aggressive environments. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protection of 12 V supply rail against load-dump transients (ISO 7637-2 Pulse 5a) during alternator disconnection. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery feed and LDO input; conducts only during overvoltage events. Use Value: Limits rail voltage to ≤12.9 V during 38.8 A surge, preventing damage to downstream 5 V regulators and microcontrollers. |
Use Scenario: Shielding 24 V digital input channels from field-wiring induced surges (IEC 61000-4-5 Level 3). IC Role / Device Role / Timing Role: Primary front-end protection device mounted directly at connector entry point; absorbs >500 W transient energy. Use Value: Maintains <1.0 μA leakage at 24 V nominal, avoiding false triggering of optocoupler-based input detection circuits. |
| Automotive Body Control Module (BCM) | Consumer Appliance Motor Driver Board |
Use Scenario: Safeguarding LIN bus transceiver power pins against battery reversal and jump-start spikes. IC Role / Device Role / Timing Role: Unidirectional clamp on VCC line upstream of transceiver IC; cathode tied to 12 V rail, anode to ground. Use Value: Clamps to 12.9 V within picoseconds, preserving transceiver functionality during 100 V/50 ms reverse-polarity events. |
Use Scenario: Protecting gate driver IC supply pins from inductive kickback generated by brushed DC motor commutation. IC Role / Device Role / Timing Role: Localized TVS on 15 V gate drive rail; placed adjacent to driver IC to minimize loop inductance. Use Value: Withstands 40 A non-repetitive forward surge (IFSM), ensuring survival across repeated motor stall events without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J7.5AHE3/H | Same electrical specs and AEC-Q101 qualification, but RoHS-compliant without halogen-free guarantee (E3 vs HM3). | Acceptable for commercial automotive modules where halogen content is not regulated; not suitable for OEMs requiring IEC 61249-2-21 compliance. | Select SMA5J7.5AHE3/H only if halogen-free certification is not required; otherwise SMA5J7.5AHM3/H is preferred for Tier 1 supply chains. |
| SMCJ7.5A-HM3 | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; higher IFSM (100 A) and RθJA (35 °C/W), lower IPPM (64.5 A). | Better suited for high-energy, low-frequency surges (e.g., lightning-induced); less optimal for space-constrained PCBs needing SMA footprint. | Choose SMCJ7.5A-HM3 when thermal budget allows larger pad area and surge energy exceeds 500 W; retain SMA5J7.5AHM3/H for compact, high-density layouts. |
Compared with SMA5J7.5AHE3/H and SMCJ7.5A-HM3, the SMA5J7.5AHM3/H uniquely combines halogen-free construction, AEC-Q101 qualification, and SMA footprint - making it the only option satisfying strict Tier 1 automotive sourcing requirements without board redesign or thermal derating penalties.
Availability
SMA5J7.5AHM3/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, and consumer appliance motor controllers requiring stable component supply with guaranteed halogen-free and AEC-Q101-compliant sourcing.
Supply support for SMA5J7.5AHM3/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, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The SMA5J series was engineered for high-power-density transient suppression in space-constrained automotive and industrial environments - delivering 500 W surge capability in the industry-standard SMA package while meeting AEC-Q101 and halogen-free mandates.
FAQ
What is the clamping voltage of the SMA5J7.5AHM3/H under maximum rated surge current?
The SMA5J7.5AHM3/H exhibits a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current (IPPM) of 38.8 A using the standard 10/1000 μs waveform. This value is measured at TA = 25 °C with devices mounted on 5.0 mm × 5.0 mm copper pads per terminal, and represents the upper voltage limit imposed on protected circuitry during worst-case transient events. The SMA5J7.5AHM3/H maintains this clamping performance consistently across its qualified temperature range.
Is the SMA5J7.5AHM3/H suitable for bidirectional transient protection?
No, the SMA5J7.5AHM3/H is a unidirectional TVS diode, as indicated by the "A" suffix (vs "CA" for bidirectional variants). It conducts only in reverse bias above VBR and blocks forward current up to 40 A (IFSM). For bidirectional protection - such as AC signal lines or differential buses - a part like SMA5J7.5CAHM3/H would be required. Using SMA5J7.5AHM3/H in bidirectional configurations risks forward conduction failure or inadequate clamping in one polarity.
Does the HM3 suffix on SMA5J7.5AHM3/H confirm AEC-Q101 qualification?
Yes, the HM3 suffix explicitly denotes halogen-free, RoHS-compliant construction and AEC-Q101 qualification per Vishay's ordering nomenclature. This is confirmed in the "Ordering Information" section of document 88875, where HM3 parts are defined as "halogen-free, RoHS-compliant, and AEC-Q101 qualified". The SMA5J7.5AHM3/H therefore meets the stress test requirements for automotive electronics, including temperature cycling, high-temperature reverse bias (HTRB), and ESD robustness.
What is the maximum reverse leakage current for SMA5J7.5AHM3/H at its rated stand-off voltage?
The SMA5J7.5AHM3/H has a maximum reverse leakage current (ID) of 1.0 μA when biased at its 7.5 V stand-off voltage (VWM), measured at TA = 25 °C. This ultra-low leakage ensures minimal power drain and no interference with high-impedance sensing nodes or precision voltage references. Leakage remains within specification across the full operating temperature range (-55 °C to +150 °C), supporting reliable performance in under-hood and industrial environments.
Can SMA5J7.5AHM3/H be used in place of SMA5J7.5A-E3 without design changes?
Yes, SMA5J7.5AHM3/H is a direct replacement for SMA5J7.5A-E3 in terms of electrical specifications, package outline, and pinout - both use SMA (DO-214AC) and share identical VWM, VBR, VC, and PPPM ratings. However, SMA5J7.5AHM3/H adds halogen-free materials and AEC-Q101 qualification, making it suitable for stricter automotive applications where SMA5J7.5A-E3 is limited to commercial-grade use. No PCB layout or schematic changes are needed.
SMA5J7.5AHM3/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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 38.8A
- 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)
SMA5J7.5AHM3/H FAQ
1.How can I place an order for SMA5J7.5AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J7.5AHM3/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 SMA5J7.5AHM3/H reliable?
The price and inventory of SMA5J7.5AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J7.5AHM3/H is usually 5 days.
3.What payment methods are accepted for SMA5J7.5AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J7.5AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J7.5AHM3/H?
SMA5J7.5AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J7.5AHM3/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 SMA5J7.5AHM3/H?
For technical support, including SMA5J7.5AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J7.5AHM3/H requirements.
6.How does Aetrix verify that SMA5J7.5AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMA5J7.5AHM3/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 SMA5J7.5AHM3/H meets industry standards.
7.What is the process for return or replacement of SMA5J7.5AHM3/H?
All SMA5J7.5AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J7.5AHM3/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 SMA5J7.5AHM3/H part is unused and in its original packaging.
Return procedure for SMA5J7.5AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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