ACST435-8BTR

Triac, 800 V, 4 A, TO-252 (DPAK), 1.1 V, 30 A, 25 mA

⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.

Manufacturer: STMICROELECTRONICS
Product type:
MSL: MSL 1 - Unlimited
SVHC: No SVHC (25-Jun-2025)
No. of Pins: 3Pins
Product Range: ACST4
Triac Case Style: TO-252 (DPAK)
Thyristor Mounting: Surface Mount
Holding Current Max: 25mA
On State RMS Current: 4A
Peak On State Voltage: 1.7V
Gate Trigger Voltage Max: 1.1V
Operating Temperature Max: 125°C
Peak Non Repetitive Surge Current: 30A
Peak Repetitive Off State Voltage: 800V

Delivery and price
Units per pack	1000
Price	0.325 €
Current stock	100+
Lead time	30 days

Datasheet

## **ACST4** 

## Overvoltage protected AC switch 

## **Datasheet** - **production data** 

## **Description** 

**==> picture [200 x 81] intentionally omitted <==**

**----- Start of picture text -----**<br>
OUT<br>G<br>COM<br>OUT<br>G COM<br>DPAK TO-220FPAB<br>**----- End of picture text -----**<br>


## **Features** 

The ACST4 series belongs to the ACS / ACST power switch family. This high performance device is suited to home appliances or industrial systems and drives loads up to 4 A. 

This ACST4 switch embeds a Triac structure with a high voltage clamping device to absorb the inductive turn-off energy and withstand line transients such as those described in the IEC 61000-4-5 standards. The ACST410 needs a low gate current to be activated (IGT < 10 mA) and still shows a high electrical noise immunity complying with IEC standards such as IEC 61000-4-4 (fast transient burst test). 

- Triac with overvoltage protection 

- Low IGT (<10 mA) or high immunity (IGT < 35 mA) version 

- High noise immunity: static dV/dt > 1000 V/µs 

- TO-220FPAB insulated package: 

   - complies with UL standards (File ref : E81734) 

   - insulation voltage: 2000 VRMS 

## **Benefits** 

## **Figure 1. Functional diagram** 

**==> picture [73 x 112] intentionally omitted <==**

**----- Start of picture text -----**<br>
OUT<br>G<br>COM<br>**----- End of picture text -----**<br>


- Enables equipment to meet IEC 61000-4-5 

- High off-state reliability with planar technology 

- Needs no external overvoltage protection 

- Reduces the power passive component count 

- High immunity against fast transients described in IEC 61000-4-4 standards 

## **Applications** 

**Table 1. Device summary** 

|**Symbol**|**Value**|**Unit**|
|---|---|---|
|IT(RMS)|4|A|
|VDRM/VRRM|800|V|
|IGT(ACST410)|10|mA|
|IGT(ACST435)|35|mA|



- AC mains static switching in appliance and industrial control systems 

- Drive of medium power AC loads such as: 

   - Universal motor of washing machine drum 

   - Compressor for fridge or air conditioner 

May 2017 

DocID8766 Rev 8 

1/14 

This is information on a product in full production. 

_www.st.com_ 

**Characteristics** 

**ACST4** 

## **1 Characteristics** 

**Table 2. Absolute maximum ratings (limiting values)** 

||**Table 2. Absolute maximum ratings (limiting values)**|**Table 2. Absolute maximum ratings (limiting values)**|**Table 2. Absolute maximum ratings (limiting values)**|||
|---|---|---|---|---|---|
|**Symbol**|**Parameter**|||**Value**|**Unit**|
|IT(RMS)|On-state rms current (full sine wave)|TO-220FPAB|Tc= 102 °C|4|A|
|||DPAK|Tc= 112 °C|||
|||DPAK with 0.5<br>cm² copper|Tamb= 60 °C|1||
|ITSM|Non repetitive surge peak on-state current<br>(full cycle sine wave, TJinitial = 25 °C)|F = 60 Hz|tp= 16.7 ms|32|A|
|||F = 50 Hz|tp= 20 ms|30|A|
|I²t|I²t Value for fusing||tp= 10 ms|6|A²s|
|dI/dt|Critical rate of rise of on-state current<br>IG= 2 x IGT, tr= 100 ns|F = 120 Hz|Tj= 125 °C|100|A/µs|
|VPP (1)|Non repetitive line peak mains voltage(1)||Tj= 25 °C|2|kV|
|PG(AV)|Average gate power dissipation||Tj= 125 °C|0.1|W|
|PGM|Peak gate power dissipation (tp= 20 µs)||Tj= 125 °C|10|W|
|IGM|Peak gate current (tp= 20 µs)||Tj= 125 °C|1.6|A|
|Tstg<br>Tj|Storage junction temperature range<br>Operating junction temperature range|||-40 to +150<br>-40 to +125|°C|
|Tl|Maximum lead soldering temperature during 10 s (at 3 mm from plastic case)|||260|°C|
|VINS(RMS)|Insulation RMS voltage (60 seconds)||T0-220FPAB|2000|V|



1. According to test described in IEC 61000-4-5 standard and _Figure 18_ 

**Table 3. Electrical characteristics (Tj = 25 °C, unless otherwise specified)** 

|**Symbol**|**Test conditions**|**Quadrant**||**ACST410**|**ACST435**|**Unit**|
|---|---|---|---|---|---|---|
|IGT<br>(1)|VOUT= 12 V, RL= 33Ω|I - II - III|MAX|10|35|mA|
|VGT|VOUT= 12 V, RL= 33Ω|I - II - III|MAX|1.0|1.1|V|
|VGD|VOUT= VDRM, RL= 3.3 kΩ,Tj= 125 °C|I - II - III|MIN|0.2||V|
|IH (2)|IOUT= 500 mA||MAX|20|25|mA|
|IL|IG= 1.2 x IGT|I - II-III|MAX|40|60|mA|
|dV/dt(2)|VOUT= 67% VDRMgate open, Tj= 125 °C||MIN|500|1000|V/µs|
|(dI/dt)c(2)|without snubber, Tj= 125 °C||MIN||5|A/ms|
|(dI/dt)c(2)|(dV/dt)c = 15 V/µs, Tj= 125 °C||MIN|2||A/ms|
|VCL|ICL= 0.1 mA, tp= 1 ms||MIN|850||V|



1. Minimum IGT is guaranteed at 5% of IGT max 

2. For both polarities of OUT pin referenced to COM pin 

2/14 

DocID8766 Rev 8 

**ACST4** 

**Characteristics** 

**Table 4. Static electrical characteristics** 

|**Symbol**|**Test conditions**|||**Value**<br>|**Unit**|
|---|---|---|---|---|---|
|VTM<br>(1)|ITM= 5.6 A, tp= 500 µs|Tj= 25 °C|MAX|1.7|V|
|VTO<br>(1)|Threshold voltage|Tj= 125 °C|MAX|0.9|V|
|RD<br>(1)|Dynamic resistance|Tj= 125 °C|MAX|110<br>|mΩ|
|IDRM<br>IRRM|VOUT= VDRM/ VRRM|Tj= 25 °C|MAX|20|µA|
|||Tj= 125 °C||0.5|mA|



1. For both polarities of OUT pin referenced to COM pin 

**Table 5. Thermal resistances** 

||**Table 5. Thermal resistances**|**Table 5. Thermal resistances**||||
|---|---|---|---|---|---|
|**Symbol**|**Parameter**|||**Value**|**Unit**|
|Rth(j-c)|Junction to case for full cycle sine wave conduction||DPAK|2.6|°C/W|
||||TO-220FPAB|4.6||
|Rth(j-a)|Junction to ambient|SCU (1)= 0.5 cm²|TO-220FPAB|60||
||||DPAK|70||



1. SCU = copper surface under tab 

**Figure 2. Maximum power dissipation versus on-state RMS current** 

**Figure 3. On-state RMS current versus case temperature (full cycle)** 

**==> picture [462 x 160] intentionally omitted <==**

**----- Start of picture text -----**<br>
6 P(W) IT(RMS)(A)<br>α  = 180° 180° 5<br>α=180°<br>5 DPAK<br>4<br>TO220FPAB<br>4<br>3<br>3<br>2<br>2<br>1<br>1<br>TC (°C)<br>IT(RMS)(A)<br>0 0<br>0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0 25 50 75 100 125<br>**----- End of picture text -----**<br>


DocID8766 Rev 8 

3/14 

**Characteristics** 

**ACST4** 

**Figure 4. On-state RMS current versus ambient temperature (free air convection, full cycle)** 

**Figure 5. Relative variation of thermal impedance versus pulse duration** 

**==> picture [462 x 357] intentionally omitted <==**

**----- Start of picture text -----**<br>
2.0 IT(RMS)(A) 1.0E+00 K = [Zth / Rth]<br>α=180° Zth(j-c)<br>TO-220FPAB DPAK Zth(j-a)<br>1.5<br>DPAK with copper<br>surface = 0.5 cm [2]<br>1.0 1.0E-01 TO-220FPAB<br>0.5<br>Ta(°C) Tp(s)<br>0.0 1.0E-02<br>0 25 50 75 100 125 1.0E-03 1.0E-02 1.0E-01 1.0E+00 1.0E+01 1.0E+02 1.0E+03<br>Figure 6. Relative variation of gate trigger  Figure 7. Relative variation of holding current<br>current (IGT) and voltage (VGT) versus junction  (IH) and latching current (IL) versus junction<br>temperature (typical values) temperature (typical values)<br>3.0 IGT , VGT [T j] / IGT , VGT [T j = 25 °C ] 2.5 IH, IL[T j] / IH, IL[T j = 25 °C ]<br>2.5 IGT Q3<br>2.0<br>2.0 IGT Q1-Q 2<br>1.5<br>1.5<br>1.0<br>1.0 V GT Q 1-Q2-Q 3<br>IL<br>0.5 0.5 IH<br>Tj(°C )<br>0.0 0.0 Tj(°C )<br>-50 -25 0 25 50 75 100 125 -50 -25 0 25 50 75 100 125<br>**----- End of picture text -----**<br>


**Figure 8. Surge peak on-state current versus number of cycles** 

**Figure 9. Non repetitive surge peak on-state current versus sinusoidal pulse width** 

**==> picture [462 x 160] intentionally omitted <==**

**----- Start of picture text -----**<br>
ITSM(A) ITSM (A), (A2s)<br>35 1000<br>dl /dt limitation: 100 A / μs Tj initial = 25 °C<br>30<br>t=20ms<br>25<br>Non repetitive One cycle 100<br>Tj initial=25 °C ITS M<br>20<br>15<br>10<br>10<br>Repetitive<br>5 TC=102°C<br>0 Number of cycles 1 tp (ms )<br>1 10 100 1000 0.01 0.10 1.00 10.00<br>**----- End of picture text -----**<br>


4/14 

DocID8766 Rev 8 

**ACST4** 

**Characteristics** 

**Figure 10. On-state characteristics (maximum values)** 

**==> picture [215 x 143] intentionally omitted <==**

**----- Start of picture text -----**<br>
ITM(A)<br>100<br>Tjmax:<br>Vto = 0.90 V<br>Rd = 110 m Ω<br>10<br>Tj = 125 °C<br>Tj = 25 °C VTM(V)<br>1<br>0 1 2 3 4 5<br>**----- End of picture text -----**<br>


**Figure 12. Relative variation of static dV/dt immunity versus junction temperature (gate open)** 

**==> picture [215 x 140] intentionally omitted <==**

**----- Start of picture text -----**<br>
6 dV/dt [Tj] / dV/dt [Tj = 125 °C]<br>VD = VR = 536 V<br>5<br>4<br>3<br>2<br>1<br>Tj(°C)<br>0<br>25 50 75 100 125<br>**----- End of picture text -----**<br>


**Figure 14. Relative variation of the clamping voltage (VCL) versus junction temperature (minimum values)** 

**==> picture [214 x 142] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.15 VCL[Tj] / VCL [Tj = 25 °C]<br>1.10<br>1.05<br>1.00<br>0.95<br>0.90<br>Tj(°C)<br>0.85<br>-50 -25 0 25 50 75 100 125<br>**----- End of picture text -----**<br>


**Figure 11. Relative variation of critical rate of decrease of main current (dI/dt)c versus junction temperature** 

**==> picture [215 x 141] intentionally omitted <==**

**----- Start of picture text -----**<br>
(dI/dt)c [Tj] / (dl/dt)c [Tj = 125 °C]<br>8<br>7<br>6<br>5<br>4<br>3<br>2<br>1<br>0 Tj(°C)<br>25 50 75 100 125<br>**----- End of picture text -----**<br>


**Figure 13. Relative variation of leakage current versus junction temperature** 

**==> picture [202 x 136] intentionally omitted <==**

**----- Start of picture text -----**<br>
IDRM/IRRM [Tj; VDRM / VRRM] / IDRM/IRRM [Tj = 125 °C; 800 V]<br>1.0E+00<br>VDRM = VRRM = 800V<br>Different blocking voltages<br>1.0E-01<br>VDRM = VRRM = 600 V<br>1.0E-02<br>VDRM = VRRM = 200 V<br>Tj(°C)<br>1.0E-03<br>25 50 75 100 125<br>**----- End of picture text -----**<br>


**Figure 15. Thermal resistance junction to ambient versus copper surface under tab** 

**==> picture [220 x 145] intentionally omitted <==**

**----- Start of picture text -----**<br>
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DocID8766 Rev 8 

5/14 

**ACST4** 

**Application information** 

## **2 Application information** 

## **2.1 Typical application description** 

The ACST4 device has been designed to control medium power load, such as AC motors in home appliances. Thanks to its thermal and turn off commutation performances, the ACST4 switch is able to drive an inductive load up to 4 A with no turn off additional snubber. It also provides high thermal performances in static and transient modes such as the compressor inrush current or high torque operating conditions of an AC motor. Thanks to its low gate triggering current level, the ACST4 can be driven directly by an MCU through a simple gate resistor as shown _Figure 16_ and _Figure 17_ . 

## **Figure 16. Compressor control – typical diagrams** 

**==> picture [389 x 257] intentionally omitted <==**

**----- Start of picture text -----**<br>
Compressor Compressor<br>AC Mains<br>AC Mains<br>PTC<br>Electronic PTC<br>ACST<br>starter<br>1 logical circuitry ACST<br>Start<br>switch<br>ACST<br>Run<br>switch<br>Electronic<br>ACST thermostat<br>Rg<br>Rg Rg<br>Gate Gate<br>Power supply Driver Power supply Driver<br>Compressor with integrated e-starter Compressor with external electronic drive<br>2<br>3<br>**----- End of picture text -----**<br>


6/14 

DocID8766 Rev 8 

**ACST4** 

**Application information** 

## **Figure 17. Universal drum motor control – typical diagram** 

**==> picture [257 x 285] intentionally omitted <==**

**----- Start of picture text -----**<br>
Universal motor<br>Stator Rotor<br>12V<br>AC Mains<br>Motor direction<br>setting<br>MCU<br>Speed motor ACST Rg<br>regulation<br>Vcc<br>MCU<br>**----- End of picture text -----**<br>


## **2.2 AC line transient voltage ruggedness** 

In comparison with standard Triacs, which are not robust against surge voltage, the ACST4 is self-protected against over-voltage, specified by the new parameter VCL. The ACST4 switch can safely withstand AC line transient voltages either by clamping the low energy spikes, such as inductive spikes at switch off, or by switching to the on state (for less than 10 ms) to dissipate higher energy shocks through the load. This safety feature works even with high turn-on current ramp up. 

The test circuit of _Figure 18_ represents the ACST4 application, and is used to stress the ACST switch according to the IEC 61000-4-5 standard conditions. With the additional effect of the load which is limiting the current, the ACST switch withstands the voltage spikes up to 2 kV on top of the peak line voltage. The protection is based on an overvoltage crowbar technology. The ACST4 folds back safely to the on state as shown in _Figure 19_ . The ACST4 recovers its blocking voltage capability after the surge and the next zero current crossing. Such a non repetitive test can be done at least 10 times on each AC line voltage polarity. 

DocID8766 Rev 8 

7/14 

**ACST4** 

**Application information** 

**Figure 18. Overvoltage ruggedness test circuit for resistive and inductive loads for IEC 61000-4-5 standards** 

**==> picture [384 x 216] intentionally omitted <==**

**----- Start of picture text -----**<br>
R = 23 Ω, L = 2 µH, Vsurge = 2 kV<br>Rg = 220 Ω (ACST410-8), 68 Ω (ACST435-8)<br>Surge generator<br>2kV surge<br>Rgene<br>Model of the load<br>Filtering unit<br>R L<br>ACST4<br>AC Mains<br>Rg<br>**----- End of picture text -----**<br>


**Figure 19. Typical current and voltage waveforms across the ACST4 during IEC 61000-4-5 standard test** 

**==> picture [220 x 177] intentionally omitted <==**

**----- Start of picture text -----**<br>
Vpeak= VCL<br>1.2/50 µs voltage surge<br>V<br>0<br>Ipeak = 90 A 8/20 µs current surge<br>I<br>0<br>dI/dt = 130 A/µs<br>**----- End of picture text -----**<br>


8/14 

DocID8766 Rev 8 

**ACST4** 

**Package information** 

## **3 Package information** 

- Epoxy meets UL94, V0 

- Cooling method: by conduction (C) 

- Recommended torque (TO-220FPAB): 0.4 to 0.6 N·m 

In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK[®] packages, depending on their level of environmental compliance. ECOPACK[®] specifications, grade definitions and product status are available at: www.st.com. ECOPACK[®] is an ST trademark. 

## **Figure 20. TO-220FPAB package outline** 

**==> picture [286 x 339] intentionally omitted <==**

**----- Start of picture text -----**<br>
A<br>H B<br>Dia<br>L6<br>L2 L7<br>L3<br>L5<br>D<br>F1<br>L4<br>F2<br>F<br>E<br>G1<br>G<br>**----- End of picture text -----**<br>


DocID8766 Rev 8 

9/14 

**ACST4** 

**Package information** 

**Table 6. TO-220FPAB package mechanical data** 

||**Table 6. TO-220FPABpackage mechanical data**|**Table 6. TO-220FPABpackage mechanical data**|**Table 6. TO-220FPABpackage mechanical data**|**Table 6. TO-220FPABpackage mechanical data**|**Table 6. TO-220FPABpackage mechanical data**|**Table 6. TO-220FPABpackage mechanical data**|
|---|---|---|---|---|---|---|
|**Ref.**|**Dimensions**||||||
||**Millimeters**|||**Inches**|||
||**Min.**|**Typ.**|**Max.**|**Min.**|**Typ.**|**Max.**|
|A|4.4||4.6|0.1732||0.1811|
|B|2.5||2.7|0.0984||0.1063|
|D|2.5||2.75|0.0984||0.1083|
|E|0.45||0.70|0.0177||0.0276|
|F|0.75||1|0.0295||0.0394|
|F1|1.15||1.70|0.0453||0.0669|
|F2|1.15||1.70|0.0453||0.0669|
|G|4.95||5.20|0.1949||0.2047|
|G1|2.4||2.7|0.0945||0.1063|
|H|10||10.4|0.3937||0.4094|
|L2||16|||0.6299||
|L3|28.6||30.6|1.1260||1.2047|
|L4|9.8||10.6|0.3858||0.4173|
|L5|2.9||3.6|0.1142||0.1417|
|L6|15.9||16.4|0.6260||0.6457|
|L7|9.00||9.30|0.3543||0.3661|
|Dia.|3.00||3.20|0.1181||0.1260|



10/14 

DocID8766 Rev 8 

**ACST4** 

**Package information** 

**Figure 21. DPAK package outline** 

_Note: This package drawing may slightly differ from the physical package. However, all the specified dimensions are guaranteed._ 

DocID8766 Rev 8 11/14 ~~a~~ 

**ACST4** 

**Package information** 

**Table 7. DPAK package mechanical data** 

||**Table 7. DPAKpackage mechanical data**|**Table 7. DPAKpackage mechanical data**|**Table 7. DPAKpackage mechanical data**|**Table 7. DPAKpackage mechanical data**|**Table 7. DPAKpackage mechanical data**|**Table 7. DPAKpackage mechanical data**|
|---|---|---|---|---|---|---|
|**Ref.**|**Dimensions**||||||
||**Millimeters**|||**Inches**|||
||**Min.**|**Typ.**|**Max.**|**Min.**|**Typ.**|**Max.**|
|A|2.18||2.40|0.0858||0.0945|
|A1|0.90||1.10|0.0354||0.0433|
|A2|0.03||0.23|0.0012||0.0091|
|b|0.64||0.90|0.0252||0.0354|
|b4|4.95||5.46|0.1949||0.2150|
|c|0.46||0.61|0.0181||0.0240|
|c2|0.46||0.60|0.0181||0.0240|
|D|5.97||6.22|0.2350||0.2449|
|D1|4.95||5.60|0.1949||0.2205|
|E|6.35||6.73|0.2500||0.2650|
|E1|4.32||5.50|0.1701||0.2165|
|e||2.286|||0.0900||
|e1|4.40||4.70|0.1732||0.1850|
|H|9.35||10.40|0.3681||0.4094|
|L|1.00||1.78|0.0394||0.0701|
|L2|||1.27|||0.0500|
|L4|0.60||1.02|0.0236||0.0402|
|V2|-8°||8°|-8°||8°|



## **Figure 22. Footprint (dimensions in mm)** 

**==> picture [290 x 178] intentionally omitted <==**

**----- Start of picture text -----**<br>
6.7 3.0 3.0<br>A<br>5.094<br>6.7<br>B<br>1.6<br>The device must be positioned within<br>0.05 A B<br>**----- End of picture text -----**<br>


12/14 

DocID8766 Rev 8 

**ACST4** 

**Ordering information** 

## **4 Ordering information** 

## **Figure 23. Ordering information scheme** 

**ACS T   4  10  -  8     B TR AC switch Topology** T = Triac **On-state rms current** 4 = 4 A **Triggering gate current** 10 = 10 mA 35 = 35 mA **Repetitive peak off-state voltage** 8 = 800V **Package** B = DPAK FP = TO-220FPAB **Delivery mode** TR = Tape and reel Blank = Tube 

**Table 8. Ordering information** 

|**Order code**|**Marking**|**Package**|**Weight**|**Base Qty**|**Delivery mode**|
|---|---|---|---|---|---|
|ACST410-8B|ACST4108|DPAK|1.5 g|50|Tube|
|ACST410-8BTR||DPAK|1.5 g|1000|Tape and reel|
|ACST410-8FP||TO-220FPAB|2.4 g|50|Tube|
|ACST435-8B|ACST4358|DPAK|1.5 g|50|Tube|
|ACST435-8BTR||DPAK|1.5 g|1000|Tape and reel|
|ACST435-8FP||TO-220FPAB|2.4 g|50|Tube|



## **5 Revision history** 

**Table 9. Document revision history** 

|||**Table 9. Document revision history**|
|---|---|---|
|**Date**|**Revision**|**Changes**|
|Jan-2003|3A|Previous update.|
|04-Jul-2007|4|Reformatted to current standard. Added package.|
|18-Dec-2009|5|VDRM/VRRMupdated to 800 V. Order codes updated.|
|02-Jun-2014|6|Updated DPAK package information and reformatted to current standard.|
|21-Oct-2014|7|Updated_Table 2_,_Table 3_,_Table 4_,_Features_and_Description_.|
|18-May-2017|8|Updated_Features_in cover page,_Table 2_and_Figure 14_.|



DocID8766 Rev 8 

13/14 

**ACST4** 

## **IMPORTANT NOTICE – PLEASE READ CAREFULLY** 

STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement. 

Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products. 

No license, express or implied, to any intellectual property right is granted by ST herein. 

Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. 

ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. 

Information in this document supersedes and replaces information previously supplied in any prior versions of this document. 

© 2017 STMicroelectronics – All rights reserved 

14/14 DocID8766 Rev 8

Updated at June 10, 2026

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Compliant Alternatives

We identify pin-to-pin, electrically equivalent substitutes that meet the same certifications (RoHS, AEC-Q100, REACH) as your original specification — validated against datasheets, not just part numbers. Often at a lower cost.

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