
HI-SINCERITY
MICROELECTRONICS CORP.
HMX1225 
HMM1225
0.8A 300/380 VOLTAGE SCRS IGT<200uA
Description
The HMX1225/HMM1225 series silicon controlled rectifiers are high 
performance planner diffused PNPN devices. These parts are intended for 
low cost high volume applications.
Absolute Maximum Ratings (Ta=25°C)
Parameter Part No. Symbol Min. Max. Unit Test Conditions
Repetitive Peak Off State 
Voltage
On-State Current IT(rms) 0.8 - A 
Average On-State Current IT(AV) 0.5 - A 
Peak Reverse Gate Voltage VGRM 8 - V IGR=10uA 
Peak Gate Current IGM 1 - A 10us max 
Gate Dissipation PG(AV) 0.1 - W 20ms max 
Operating Temperature Tj -40 125 
Storage Temperature Tstg -40 125 
Soldering Temperature Tsld - 250
HMX1225
HMM1225
VDRM 
VDRM
380 
300
-
-
V
Tj=40°C to 125°C
V
(RGK=1K) 
TC=40°C 
Half Cycle=180°,TC=40°C
°C 
°C
1.6mm from case 10s max
°C
Spec. No. : Preliminary Data 
Issued Date : 2000.07.01 
Revised Date : 2001.09.06 
Page No. : 1/2
Classification Of IGT
Rank A C
HMX1225 10-23 uA 17-55 uA
HMM1225 10-23 uA 17-55 uA
Electrical Characteristics (Ta=25°C)
Parameter Symbol Min Max Unit Test Conditions 
Off-State Leakage Current IDRM - 0.1 mA 
Off-State Leakage Current IDRM - 5 uA
On-State Voltage VT 
On-St ate Threshold Voltage VT(TO) - 0.95 V
On-State Slops Resistance rT - 600 Ohm 
Gate Trigger Current IGT - 200 uA VD=7V 
Gate Trigger Voltage VGT - 0.8 V VD=7V 
Holding Current IH - 5 mA RGK=1K(ohm) 
Latching Current IL - 6 mA RGK=1K(ohm) 
Critical Rate of Voltage Rise dv/dt 25 - V/us 
Crtical Rate of Current Rise di/dt 30 - A/us 
Gate Controlled Delay Time tgd - 500 ns IG=10mA,diG/dt=0.1A/us
Commutated Turn-of f Time tg - 200 us 
Thermal Resistance junc.to case
Thermal Resistance junc. to amb
HMX1225 & HMM1225 HSMC Product Specification
Rθjc 
Rθja
-1.4V
-2.2V
100 - K/W 
200 - K/W
@VDRM (RGK=1K), Tj=125°C 
@VDRM (RGK=1K), Tj=25°C 
at IT=0.4A, Tj=25°C 
at IT=0.8A, Tj=25°C 
Tj=125°C 
Tj=125°C
VD=0.67*VDRM(RGK=1K), Tj=125°C 
IG=10mA,diG/dt=0.1A/us, Tj=125°C
Tc=85°C,VD=0.67*VDRM 
VR=35V,IT=IT(AV)

HI-SINCERITY
MICROELECTRONICS CORP.
SOT-89 Dimension
C
Spec. No. : Preliminary Data 
Issued Date : 2000.07.01 
Revised Date : 2001.09.06 
Page No. : 2/2
HMX1225 Marking:
H
Date Code
B
D
Laser Marking
H1MX
225
321
HMM1225 Marking:
E
F
G
A
3-Lead SOT-89 Pla stic Su rface Mounted Package
DIM
A 0.1732 0.1811 4.40 4.60 F 0.0583 0.0598 1.48 1.52 
B 0.1594 0.1673 4.05 4.25 G 0.1165 0.1197 2.96 3.04 
C 0.0591 0.0663 1.50 1.70 H 0.0551 0.0630 1.40 1.60 
D 0.0945 0.1024 2.40 2.60 I 0.0138 0.0161 0.35 0.41 
E 0.0141 0.0201 0.36 0.51
Notes: 1.Dimension and tolerance based on our Spec. dated May. 05,1996.
2.Controlling dimension: millimeters.
3.Maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material.
4.If there is any question with packing specification or packing method, please contact your local HSMC sales office.
Material:
• Lead: 42 Alloy ; solder plating
• Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0
Inches Millimeters Inches Millimeters
Min. Max. Min. Max.
I
Style: Pin 1.Gate 2.Anode 3.Cathode
HSMC Package Code: M
DIM
Min. Max. Min. Max.
Date Code
Laser Marking
H1MM
225
*: Typical
Important Notice:
• All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of HSMC.
• HSMC reserves the right to make changes to its products without notice.
• HSMC semiconductor products are not warranted to be suitable for use in Life-Support Applications, or systems.
• HSMC assumes no liability for any consequence of customer product design, infringement of patents, or application assistance.
Head Office And Factory:
• Head Office (Hi-Sincerity Microelectronics Corp.): 10F.,No. 61, Sec. 2, Chung-Shan N. Rd. Taipei Taiwan R.O.C. 
Tel: 886-2-25212056 Fax: 886-2-25632712, 25368454
• Factory 1: No. 38, Kuang Fu S. Rd., Fu-Kou Hsin-Chu Industrial Park Hsin-Chu Taiwan. R.O.C 
Tel: 886-3-5983621~5 Fax: 886-3-5982931
HMX1225 & HMM1225 HSMC Product Specification