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Vishay General Semiconductor - Diodes Division SMPC24ANHM3/I
- Part No.:
- SMPC24ANHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC24ANHM3/I.pdf
- Description:
- TVS DIODE 24VWM 38.9VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:8,868
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Product details
Overview
SMPC24ANHM3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the TRANSZORB® family, designed for high-energy surge protection on DC power rails and signal lines. It features a 24.0 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR), 38.6 A peak pulse current (IPPM), 38.9 V clamping voltage (VC) at IPPM, and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces and MOSFET gate protection.
For engineers reviewing the SMPC24ANHM3/I datasheet, SMPC24ANHM3/I pinout, SMPC24ANHM3/I application, or SMPC24ANHM3/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, TO-277A package dimensions, thermal resistance data, and direct alternatives for automotive-grade overvoltage protection design.
Technical Context
This device operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified VBR range (26.7–29.5 V). Its low incremental surge resistance and fast response time enable effective clamping of transients induced by inductive load switching or ESD events.
Designed for surface-mount placement on FR4 PCBs with 2 oz. copper, it delivers 1.25 W steady-state power dissipation at TA = 25 °C and supports junction temperatures from –55 °C to +150 °C. The cathode-band-marked SMPC (TO-277A) package ensures polarity-aware mounting per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24.0 V - maximum continuous reverse operating voltage before conduction begins |
| VBR @ IT = 1 mA | 26.7–29.5 V - guaranteed avalanche breakdown range defining turn-on threshold |
| VC @ IPPM | 38.9 V - clamped voltage during 38.6 A 10/1000 μs surge, limiting stress on downstream ICs |
| PPPM | 1500 W - peak transient power handling capability under standardized surge waveform |
| RθJA | 85–100 °C/W - thermal resistance from junction to ambient, critical for derating above 25 °C |
| TJ max. | +150 °C - maximum allowable junction temperature, enabling operation in under-hood automotive environments |
| Polarity | Unidirectional - protects against positive-going transients only; requires correct cathode orientation |
Pinout & Package
Package: SMPC (TO-277A), 3-terminal surface-mount case with matte tin-plated leads, 1.1 mm typical height, UL 94 V-0 molding compound, and AEC-Q101 qualification for automotive use. Cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 / Anode 2 | Parallel anode terminals | Internally tied anodes allow dual-path current sharing; both must connect to protected line |
| Cathode | Common cathode terminal | Connected to system ground or reference rail; clamping occurs between anodes and cathode |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (1.1 mm) | Enables use in space-constrained automotive ECUs and compact sensor modules without height interference |
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and body electronics |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for 3.3 V/5 V logic |
| Meets MSL Level 1 | Allows unlimited floor life and reflow up to 260 °C peak, compatible with standard SMT assembly processes |
| Halogen-free & RoHS-compliant | Fulfills environmental compliance requirements for global automotive and industrial OEM supply chains |
Applications
| Automotive Sensor Protection | MOSFET Gate Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output line and chassis ground to clamp transients before they reach precision amplifier inputs. Use Value: Limits clamped voltage to 38.9 V while absorbing 1500 W surges, preserving signal integrity and preventing latch-up in 5 V-tolerant receivers. | Use Scenario: Shielding N-channel MOSFET gates from voltage spikes caused by inductive flyback in motor driver half-bridges. IC Role / Device Role / Timing Role: Connected between gate and source, suppressing >24 V transients that could exceed gate oxide breakdown limits. Use Value: Fast response and low clamping voltage prevent unintended turn-on or gate oxide damage during PWM switching transitions. |
| Industrial Power Rail Protection | Telecom Interface Protection |
Use Scenario: Safeguarding 24 V DC input rails in PLC I/O modules exposed to field-wiring transients and relay contact bounce. IC Role / Device Role / Timing Role: Mounted at board edge on main power entry, shunting surge energy to ground before reaching DC/DC converters and microcontrollers. Use Value: 1500 W PPPM rating handles repetitive 10/1000 μs surges per IEC 61000-4-5 Level 3, ensuring long-term reliability in factory environments. | Use Scenario: Protecting RS-485 transceiver pins in base station backhaul equipment subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Placed differential-line-to-ground on A/B bus lines to suppress common-mode transients without distorting signal edges. Use Value: Unidirectional configuration avoids forward conduction during normal ±5 V differential signaling, maintaining data integrity at 10 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24AHE3/5BT | DO-214AC (SMA) package; 24 V VWM; 38.9 V VC; same 1500 W PPPM but higher RθJA (~150 °C/W) | Lacks AEC-Q101 qualification; not rated for automotive under-hood use | Select for cost-sensitive industrial designs where automotive qualification is unnecessary |
| SMCJ24AHM3/87A | SMC (DO-214AB) package; same VWM/VC/PPPM; AEC-Q101 qualified; larger footprint and 2.2 mm height | Better thermal performance (RθJA ~60 °C/W) but incompatible with ultra-low-profile layouts | Select when higher steady-state power handling or improved thermal margin is required in non-height-constrained boards |
Compared with SMPC24ANHM3/I, SMAJ24AHE3/5BT offers identical electrical protection but lacks automotive qualification and thermal efficiency, while SMCJ24AHM3/87A provides superior thermal robustness at the expense of board space - making SMPC24ANHM3/I optimal for AEC-Q101-compliant, low-profile automotive sensor nodes.
Availability
SMPC24ANHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, MOSFET gate safeguarding, and industrial 24 V power rail stabilization requiring stable component supply across production lifecycles.
Supply support for SMPC24ANHM3/I 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, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMPC series targets automotive and industrial transient suppression, engineered specifically for AEC-Q101 compliance, low-profile mounting, and high-energy surge absorption in harsh electromagnetic environments.
FAQ
What is the clamping voltage of SMPC24ANHM3/I at its rated peak pulse current?
The SMPC24ANHM3/I has a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current (IPPM) of 38.6 A under a 10/1000 μs waveform. This value is measured across the device terminals and defines the upper voltage limit imposed on protected circuitry during surge events. The SMPC24ANHM3/I maintains this clamping performance consistently due to its low incremental surge resistance and optimized silicon structure.
Is SMPC24ANHM3/I qualified for automotive applications?
Yes, SMPC24ANHM3/I is AEC-Q101 qualified, as confirmed by Vishay's documentation for the SMPC22AN through SMPC85AN series. The "HM3" suffix explicitly denotes AEC-Q101 qualification, halogen-free composition, and RoHS compliance. This makes SMPC24ANHM3/I suitable for automotive powertrain, chassis, and body electronics where reliability under thermal cycling, vibration, and voltage transients is mandatory.
What does the "I" suffix mean in SMPC24ANHM3/I?
The "I" suffix in SMPC24ANHM3/I indicates packaging in 13-inch diameter plastic tape and reel, with a base quantity of 6500 units per reel. This is distinct from the "H" suffix (7-inch reel, 1500 units). Both share identical electrical, thermal, and mechanical specifications - the "I" variant is optimized for high-volume SMT production lines requiring extended reel lengths and reduced changeover frequency.
How does the SMPC (TO-277A) package differ from standard SMA or SMC packages?
The SMPC (TO-277A) package used by SMPC24ANHM3/I measures 4.80 × 3.70 × 1.10 mm and features a 3-terminal configuration with two anodes and one cathode, enabling lower inductance and parallel current paths. Unlike SMA (DO-214AC) or SMC (DO-214AB), SMPC offers 1.1 mm typical height - ~50% lower than SMC - and meets MSL Level 1 for lead-free reflow. Its JEDEC-compliant outline ensures compatibility with automated pick-and-place systems calibrated for ultra-thin components.
Can SMPC24ANHM3/I be used in bidirectional protection circuits?
No, SMPC24ANHM3/I is strictly unidirectional and must be oriented with its cathode band toward the system ground or reference rail. It conducts only during positive transients relative to ground. For bidirectional protection (e.g., AC lines or differential buses), a separate bidirectional TVS such as SMBJ24CA or dedicated dual-diode configurations are required. Using SMPC24ANHM3/I in reverse-biased configurations will not provide clamping and may result in device failure.
SMPC24ANHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- TO-277, 3-PowerDFN
- Series:
- TransZorb®, eSMP™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 38.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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:
- TO-277A (SMPC)
SMPC24ANHM3/I FAQ
1.How can I place an order for SMPC24ANHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC24ANHM3/I 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 SMPC24ANHM3/I reliable?
The price and inventory of SMPC24ANHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC24ANHM3/I is usually 5 days.
3.What payment methods are accepted for SMPC24ANHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC24ANHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC24ANHM3/I?
SMPC24ANHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC24ANHM3/I 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 SMPC24ANHM3/I?
For technical support, including SMPC24ANHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC24ANHM3/I requirements.
6.How does Aetrix verify that SMPC24ANHM3/I is sourced from the original manufacturer or authorized distributors?
All SMPC24ANHM3/I 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 SMPC24ANHM3/I meets industry standards.
7.What is the process for return or replacement of SMPC24ANHM3/I?
All SMPC24ANHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMPC24ANHM3/I, 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 SMPC24ANHM3/I part is unused and in its original packaging.
Return procedure for SMPC24ANHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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