My Inquiry
My Account
onsemi MC7824CT
- Part No.:
- MC7824CT
- Manufacturer:
- onsemi
- Package:
- TO-220-3
- Datasheet:
-
MC7824CT.pdf
- Description:
- IC REG LINEAR 24V 1A TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,324
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MC7824CT from onsemi is a fixed-output, 24 V, 1.0 A positive linear voltage regulator in TO-220 package with internal thermal shutdown, short-circuit current limiting, and safe-area compensation. It delivers stable 24 V output across 5 mA–1.0 A load range with ≤2.0 V dropout at full load, supporting local regulation in industrial power supplies and embedded control systems.
For engineers reviewing the MC7824CT datasheet, pinout, applications, or equivalent options, this page provides verified electrical specs, thermal behavior, real-world stability guidance (including input/output capacitor requirements), and validated drop-in alternatives for legacy 24 V rail designs requiring high reliability and automotive-grade variants.
Technical Context
The MC7824CT implements a monolithic series pass transistor architecture with built-in protection circuitry: thermal overload shutdown activates at +150°C junction temperature, short-circuit current limit holds peak output to 0.2 A under fault, and safe-area compensation dynamically reduces short-circuit current as VIN−VOUT increases - preventing secondary breakdown during overvoltage transients.
It operates with a minimum input-to-output differential of 2.0 V at 1.0 A, requires no external components for basic operation, and maintains ±2% output tolerance (23 V to 25 V) over temperature and load. Ripple rejection is 54 dB at 120 Hz with 28–38 V input, and output noise is 10 µV/V RMS (10 Hz–100 kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 24 V nominal, 23.2–25.8 V over 5 mA–1.0 A load and −40°C to +125°C (MC7824AC spec) |
| Output Current | 1.0 A continuous; 2.2 A peak (short duration, thermally limited) |
| Dropout Voltage | 2.0 V at 1.0 A and +25°C - dictates minimum input of 26 V for full-load 24 V output |
| Ripple Rejection | 54 dB at 120 Hz (28–38 V input) - suppresses ~99.7% of AC ripple amplitude |
| Quiescent Current | 3.6–6.0 mA - enables low-noise operation without excessive standby loss |
| Thermal Shutdown | Activates at +150°C junction temperature - protects against sustained overload or heatsink failure |
| Short-Circuit Limit | 0.2 A typical (at VIN = 35 V) - limits fault energy and PCB trace stress |
Pinout & Package
MC7824CT uses the standard TO-220 package (Case 221AB), with metal tab electrically connected to Pin 2 (Ground). Heatsinking is required for >500 mA continuous operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Input | Unregulated DC input; must be ≥26 V for 24 V/1.0 A output; bypass with ≥0.33 µF capacitor near pin |
| Pin 2 | Ground | Common reference for input and output; metal tab is internally connected - must be tied to system ground plane |
| Pin 3 | Output | Regulated +24 V output; optional 0.1–1.0 µF output capacitor improves transient response (not required for stability) |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 24 V output | Eliminates external resistor network - simplifies BOM and layout for dedicated 24 V rails |
| Internal thermal shutdown | Prevents permanent damage during overheating; auto-recovery after cooldown - no manual reset needed |
| Safe-area compensated pass transistor | Reduces short-circuit current as VIN−VOUT rises - avoids second breakdown during line surges |
| No external components required | Enables minimal footprint design; input capacitor only needed if >10 cm from bulk filter |
| Pb-free and RoHS-compliant | Meets environmental compliance for industrial and automotive production without special handling |
Applications
| Industrial PLC Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Provides clean 24 V bias for analog sensor interfaces and relay drivers in programmable logic controllers. IC Role / Device Role / Timing Role: Primary local regulator converting 28 V vehicle or 32 V industrial bus to stable 24 V for analog front-ends and digital I/O. Use Value: Maintains ±2% output accuracy across −40°C to +85°C ambient and rejects 54 dB of alternator ripple - ensuring ADC reference stability and relay coil timing integrity. |
Use Scenario: Powers microcontroller peripherals and CAN transceivers in body electronics modules. IC Role / Device Role / Timing Role: Secondary regulator deriving 24 V from main 12/24 V battery rail for high-side switch drivers and LIN interface ICs. Use Value: Internal short-circuit limiting (0.2 A) prevents fuse blowing during wiring faults; thermal shutdown protects against enclosure overheating in sealed modules. |
| Legacy Equipment Retrofit | Test & Measurement Instrumentation |
|
Use Scenario: Replaces obsolete 24 V regulators in field-deployed medical or lab equipment requiring long-term component availability. IC Role / Device Role / Timing Role: Drop-in replacement for aging 7824 variants in linear power stages where PCB layout cannot be modified. Use Value: Identical TO-220 pinout and electrical behavior (2.0 V dropout, 1.0 A rating) ensures zero redesign - critical for certified hardware maintenance. |
Use Scenario: Supplies precision op-amps and DACs in benchtop power analyzers and signal generators. IC Role / Device Role / Timing Role: Low-noise 24 V source for analog signal chains where PSRR and output impedance directly impact measurement accuracy. Use Value: 10 µV/V RMS noise (10 Hz–100 kHz) and 1.4 mΩ output resistance minimize voltage perturbation under dynamic loads - preserving SFDR in sensitive circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC7824CD2TR4G | Same 24 V/1.0 A spec, but in D2PAK-3 surface-mount package (no through-hole mounting or heatsink tab) | Used in space-constrained, automated SMT production; lacks mechanical heatsink interface | Select when board area is critical and thermal load < 0.5 W; verify PCB copper pour suffices for heat dissipation |
| NCV7824BD2TR4G | Automotive-grade variant: AEC-Q100 qualified, wider temp range (−40°C to +150°C), tighter initial tolerance (±2% vs ±4%) | Required for OEM automotive ECUs; supports extended junction temperature operation | Choose for safety-critical or high-ambient environments where NCV prefix compliance is mandated |
Compared with MC7824CT, MC7824CD2TR4G offers SMT compatibility at the cost of thermal performance, while NCV7824BD2TR4G adds automotive qualification and tighter tolerances - both require layout changes but preserve identical regulation behavior and protection features.
Availability
MC7824CT is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, legacy equipment repair, and test instrumentation requiring stable component supply and long-term obsolescence management.
Supply support for MC7824CT 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, and sensing solutions for automotive, industrial, and cloud infrastructure markets.
The MC7800 series - including MC7824CT - was designed as a robust, drop-in fixed-voltage linear regulator family for cost-sensitive, high-reliability applications where simplicity, thermal resilience, and proven protection architecture outweigh switching efficiency requirements.
FAQ
What is the minimum input voltage required for MC7824CT to regulate 24 V at 1.0 A?
The MC7824CT requires a minimum input-to-output differential of 2.0 V at 1.0 A and +25°C, so the absolute minimum input voltage is 26.0 V. For reliable operation across temperature and line variation, an input of ≥27.3 V is recommended per the MC7824AC specification sheet - ensuring regulation remains within 23.2–25.8 V across full load and −40°C to +125°C.
Does MC7824CT require input and output capacitors for stable operation?
MC7824CT does not require output capacitance for stability, but a 0.1–1.0 µF ceramic or tantalum capacitor at the output improves transient response. An input bypass capacitor (≥0.33 µF) is recommended if the regulator is located more than ~10 cm from the bulk filter - especially with long traces or high-impedance sources - to prevent oscillation and ensure high-frequency ripple suppression.
How does the safe-area compensation in MC7824CT protect the device during overload?
MC7824CT's safe-area compensation reduces short-circuit current as the voltage across its internal pass transistor increases. During a fault, instead of sustaining 0.2 A at high VIN−VOUT, the current drops progressively - preventing localized hot-spot formation and secondary breakdown. This allows safe operation even with 35 V input during output shorts, unlike uncompensated regulators that risk thermal runaway.
Can MC7824CT be used in automotive applications?
The standard MC7824CT is not AEC-Q100 qualified and is rated for 0°C to +125°C operating junction temperature. For automotive use, the NCV7824BD2TR4G variant is specified - it meets AEC-Q100 Grade 1 (−40°C to +125°C ambient), includes PPAP documentation, and features tighter initial output tolerance (±2%). MC7824CT may function in non-safety-critical aftermarket modules but lacks formal automotive qualification.
What thermal considerations apply when using MC7824CT at full 1.0 A load?
At 1.0 A output with 28 V input, MC7824CT dissipates ~4 W (PD = (28 V − 24 V) × 1.0 A). With RJA = 92°C/W (TO-220, no heatsink), junction temperature would exceed +150°C - triggering thermal shutdown. A minimum 20 cm² copper pour (2 oz) or small clip-on heatsink (RTH ≤ 20°C/W) is required to maintain TJ < 125°C. Derate output current above +70°C ambient.
MC7824CT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 24V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 2V @ 1A (Typ)
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 6.5 mA
- Current - Supply (Max):
- -
- PSRR:
- 61dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
MC7824CT FAQ
1.How can I place an order for MC7824CT through Aetrix?
Please submit a Request for Quotation (RFQ) for MC7824CT 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 MC7824CT reliable?
The price and inventory of MC7824CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC7824CT is usually 5 days.
3.What payment methods are accepted for MC7824CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC7824CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC7824CT?
MC7824CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC7824CT 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 MC7824CT?
For technical support, including MC7824CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC7824CT requirements.
6.How does Aetrix verify that MC7824CT is sourced from the original manufacturer or authorized distributors?
All MC7824CT 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 MC7824CT meets industry standards.
7.What is the process for return or replacement of MC7824CT?
All MC7824CT units undergo pre-shipment inspection (PSI). If there is an issue with MC7824CT, 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 MC7824CT part is unused and in its original packaging.
Return procedure for MC7824CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MC7824CT Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
