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Vishay General Semiconductor - Diodes Division SMP7.5A-M3/85A
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- Part No.:
- SMP7.5A-M3/85A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
SMP7.5A-M3/85A.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,870
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Product details
Overview
SMP7.5A-M3/85A from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor in the SMP (DO-220AA) package, featuring a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR), 400 W peak pulse power (10/1000 μs), 31.0 A peak pulse current (IPPM), and clamping voltage of 12.9 V at IPPM. It protects sensitive ICs and MOSFETs against inductive switching transients in industrial and telecom power rails.
For engineers reviewing the SMP7.5A-M3/85A datasheet, SMP7.5A-M3/85A pinout, SMP7.5A-M3/85A application, or SMP7.5A-M3/85A equivalent, key selection criteria include unidirectional polarity, 12.9 V clamping performance at 31.0 A, M3 halogen-free RoHS-compliant construction, 1.0 mm profile for space-constrained PCBs, and 13" tape-and-reel packaging (85A code).
Technical Context
This device operates as a unidirectional TVS diode with avalanche breakdown behavior, designed to clamp transient overvoltages before they damage downstream circuitry. Its low incremental surge resistance and fast response time ensure effective suppression of 10/1000 μs waveform surges up to 400 W without thermal runaway under defined PCB pad conditions.
The SMP7.5A-M3/85A is rated for junction temperatures from –55 °C to +150 °C and exhibits 2.5 V maximum forward voltage at 25 A. Its thermal resistance is 50 °C/W (junction-to-lead) and 250 °C/W (junction-to-ambient), requiring minimum 5.0 mm × 5.0 mm copper pads per terminal for full power derating compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum reverse working voltage before clamping begins; defines safe operating DC/AC bias range. |
| VBR min/max | 8.33 V / 9.21 V - Breakdown voltage range at 1.0 mA test current; ensures consistent turn-on threshold across production lots. |
| VC @ IPPM | 12.9 V - Clamping voltage at 31.0 A peak pulse current; determines maximum stress imposed on protected circuit during surge. |
| PPPM | 400 W - Peak pulse power handling capability with 10/1000 μs waveform; defines transient energy absorption capacity. |
| IFSM | 40 A - Non-repetitive forward surge current rating (10 ms half-sine); supports inrush or fault-current tolerance in power paths. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in high-ambient industrial environments with proper thermal design. |
| RθJL | 50 °C/W - Junction-to-lead thermal resistance; informs heatsinking requirements when mounted on standard PCB copper pads. |
Pinout & Package
Package: SMP (DO-220AA), surface-mount, unidirectional configuration with cathode indicated by color band. Dimensions: 3.61 mm × 2.18 mm × 1.0 mm (L × W × H), matte tin-plated leads, MSL Level 1, 260 °C reflow compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or transient clamping | Connected to lower-potential side of protected line; forms avalanche path during reverse overvoltage events. |
| Cathode | Current exit point during clamping; marked with color band | Connected to higher-potential side (e.g., VBUS or signal line); defines polarity-sensitive placement on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V power rails with margin. |
| 12.9 V clamping voltage at 31.0 A | Limits voltage overshoot below 13.5 V for 3.3 V/5 V logic interfaces and gate drivers during worst-case transients. |
| 1.0 mm typical height | Supports ultra-thin designs in portable telecom modules and stacked PCB assemblies where Z-height is constrained. |
| M3 suffix (halogen-free, RoHS, JESD 201 Class 2 whisker test) | Ensures long-term solder joint reliability and environmental compliance for automotive-qualified industrial production. |
| MSL Level 1, 260 °C peak reflow | Permits single-pass lead-free assembly without moisture sensitivity concerns or baking requirements. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of gate drivers and microcontrollers from flyback voltage spikes generated by relay or solenoid coil de-energization. IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC bus or control signal lines to clamp transients within 1 ns. Use Value: Prevents latch-up or permanent damage to 3.3 V logic inputs and 12 V gate drive circuits with <13 V clamping ceiling. |
Use Scenario: Input-stage surge suppression on 48 V telecom rectifier outputs exposed to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary clamping device on secondary-side DC distribution rail upstream of POL converters. Use Value: Absorbs 400 W transient energy while maintaining <13 V clamping to safeguard downstream 5 V/3.3 V management ICs. |
| Automotive Body Control Modules | Consumer Sensor Interface Boards |
Use Scenario: Protection of LIN bus transceivers and MCU I/O pins against load dump and jump-start transients in 12 V systems. IC Role / Device Role / Timing Role: Localized TVS on each protected signal line, placed adjacent to connector entry points. Use Value: Delivers 31.0 A peak current handling with 12.9 V clamping to meet ISO 7637-2 Pulse 1/2a immunity requirements. |
Use Scenario: ESD and EFT protection for analog sensor outputs (e.g., temperature, humidity) connected to ADC inputs in smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) unidirectional suppressor on signal lines between sensor and host MCU. Use Value: Maintains signal integrity with minimal loading while suppressing ±8 kV contact ESD per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMP7.5A-M3/84A | Same electrical specs; differs only in packaging-3000-unit 7" tape reel vs. 10,000-unit 13" reel. | Identical use cases; selected based on production volume and SMT line feeder compatibility. | Choose /84A for prototyping or low-volume builds; /85A for high-volume automated assembly. |
| SMAJ7.5A | Higher RθJA (350 °C/W), larger SMA (DO-214AC) package (4.5 mm × 2.7 mm × 2.2 mm), same VWM/VBR/VC ratings. | Less suitable for ultra-thin or high-density layouts; better thermal mass for lower-frequency surge repetition. | Select SMAJ7.5A only if board real estate allows larger footprint and thermal design accommodates higher ambient rise. |
Compared with SMP7.5A-M3/84A, the /85A variant offers identical protection performance with optimized logistics for high-volume manufacturing; versus SMAJ7.5A, SMP7.5A-M3/85A delivers 55 % smaller footprint and 1.2 mm lower profile-critical for modern compact power modules where Z-height and layout density constrain TVS placement.
Availability
SMP7.5A-M3/85A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and automotive body control modules requiring stable component supply, halogen-free compliance, and MSL Level 1 reflow readiness.
Supply support for SMP7.5A-M3/85A 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 optoelectronics with emphasis on reliability, power efficiency, and AEC-Q200 qualification.
The SMP series was engineered for high-density, low-profile transient protection in space-constrained power and signal lines across industrial, telecom, and automotive applications-prioritizing fast response, tight VBR tolerance, and robust surge handling in miniature packages.
FAQ
What is the clamping voltage of SMP7.5A-M3/85A at its rated peak pulse current?
The SMP7.5A-M3/85A has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current (IPPM) of 31.0 A using a 10/1000 μs waveform. This value is measured under standardized test conditions with 5.0 mm × 5.0 mm copper pads per terminal and defines the upper voltage limit imposed on protected circuitry during surge events. The SMP7.5A-M3/85A maintains this clamping performance consistently across its qualified operating temperature range.
Is SMP7.5A-M3/85A suitable for bidirectional transient protection?
No, SMP7.5A-M3/85A is a unidirectional TVS diode and is not suitable for bidirectional protection. Its electrical characteristics-including breakdown voltage, clamping behavior, and polarity marking-are specified only for reverse-biased operation. For bidirectional applications requiring symmetrical clamping above and below ground, a dedicated bidirectional part such as SMP7.5CA-M3/85A must be used instead of SMP7.5A-M3/85A.
What does the "M3/85A" suffix indicate in SMP7.5A-M3/85A?
The "M3" suffix denotes halogen-free, RoHS-compliant construction with matte tin-plated leads that pass JESD 201 Class 2 whisker testing, while "85A" specifies the packaging format: 10,000 units per 13-inch diameter plastic tape-and-reel. This distinguishes SMP7.5A-M3/85A from the /84A variant (3000 units on 7-inch reel), with no electrical or thermal differences between the two versions. Both share identical SMP7.5A-M3/85A device specifications.
Can SMP7.5A-M3/85A be used in place of a 5.0 V TVS like SMP5.0A?
No-SMP7.5A-M3/85A is not a drop-in replacement for SMP5.0A due to its higher 7.5 V stand-off voltage (VWM) and 8.33–9.21 V breakdown range. Using SMP7.5A-M3/85A on a 5.0 V rail risks insufficient clamping margin or failure to activate during 5 V system transients. The SMP7.5A-M3/85A is specifically intended for 7–8 V nominal circuits; selecting it over SMP5.0A requires redesigning the protected node's voltage budget and verifying clamping headroom.
What PCB layout guidance applies to SMP7.5A-M3/85A for full 400 W rating?
To achieve the full 400 W peak pulse power rating, SMP7.5A-M3/85A must be mounted on PCB pads of at least 5.0 mm × 5.0 mm copper area per terminal, as specified in the datasheet's derating curves. Smaller pads reduce thermal dissipation and require power derating per Figure 2. Trace inductance must also be minimized-short, wide traces directly connecting anode/cathode to protected nodes-to preserve sub-nanosecond response and avoid voltage overshoot beyond the rated VC of 12.9 V.
SMP7.5A-M3/85A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-220AA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 31A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-220AA (SMP)
SMP7.5A-M3/85A FAQ
1.How can I place an order for SMP7.5A-M3/85A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMP7.5A-M3/85A 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 SMP7.5A-M3/85A reliable?
The price and inventory of SMP7.5A-M3/85A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMP7.5A-M3/85A is usually 5 days.
3.What payment methods are accepted for SMP7.5A-M3/85A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMP7.5A-M3/85A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMP7.5A-M3/85A?
SMP7.5A-M3/85A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMP7.5A-M3/85A 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 SMP7.5A-M3/85A?
For technical support, including SMP7.5A-M3/85A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMP7.5A-M3/85A requirements.
6.How does Aetrix verify that SMP7.5A-M3/85A is sourced from the original manufacturer or authorized distributors?
All SMP7.5A-M3/85A 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 SMP7.5A-M3/85A meets industry standards.
7.What is the process for return or replacement of SMP7.5A-M3/85A?
All SMP7.5A-M3/85A units undergo pre-shipment inspection (PSI). If there is an issue with SMP7.5A-M3/85A, 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 SMP7.5A-M3/85A part is unused and in its original packaging.
Return procedure for SMP7.5A-M3/85A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMP7.5A-M3/85A Tags
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